Text

Response to NRC Request for Additional Information, Dated May 22, 2015 Regarding License Renewal Application, Environmental Review, MA-01 on Meteorology, Air Quality & Noise
	ML15195A344
Person / Time
Site:	LaSalle
Issue date:	07/02/2015
From:	; Exelon Generation Co
To:	; Office of Nuclear Reactor Regulation
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LaSalle Environmental Audit Response to Request for Additional Information Index #: 001 RAI #: MA-01 Category: Meteorology, Air Quality & Noise Statement of Question: Provide the following meteorological information from the data recorded at the LaSalle County Station, Units 1 and 2 (LSCS) meteorological facility for the most recent 5 years for which data is available:

a. mean monthly and annual temperatures;

b. mean monthly precipitation and annual precipitation; and c. seasonal and annual summary wind statistics in the form of wind direction, wind roses, annual average wind speed and peak wind gust.Response: a. Mean monthly temperature data are presented in Section 7 of the LSCS Meteorological Monitoring Program monthly monitoring reports. These monthly reports provide the basis for the LSCS Meteorological Monitoring Program annual reports. The average of the monthly mean temperatures and the average annual temperatures (based upon the monthly mean temperatures) for the years 2010 through 2014 are presented in Table 1 below.Table I LaSalle County Station Mean Monthly Temperatures at 33 feet (OF)2010 -2014 AVERAGE Mean 2010 2011 2012 2013 2014 (for month)January 19.1 20.5 30.2 26.8 16.0 22.5 February 25.0 26.8 33.0 27.0 15.4 25.4 March 42.9 38.3 53.2 32.2 31.7 39.7 April 57.2 49.9 52.4 47.7 49.8 51.4 May 62.7 61.2 66.5 63.6 62.5 63.3 June 72.1 71.7 72.8 69.8 71.3 71.5 July 75.9 79.0 80.1 72.5 69.3 75.4 August 75.3 73.3 72.3 72.1 71.7 72.9 September 65.7 61.6 63.6 66.7 63.2 64.2 October 56.3 54.6 50.6 53.7 52.5 53.5 November 41.9 43.9 39.8 37.2 33.6 39.3 December 20.8 35.0 35.4 23.9 31.5 29.3 AVERAGE Mean 51.2 51.3 54.2 49.4 47.4 (for year) I SOURCE: Monthly Reports on Meteorological Monitoring Program at the LaSalle County Nuclear Station (2010 to 2014)1

b. Monthly and annual total precipitation data are presented each year in the LSCS Meteorological Monitoring Program annual report, Table 12. The mean monthly and annual total precipitation amounts during 2010 through 2014 are summarized in Table 2 below. Copies of the annual reports are being provided.Table 2 LaSalle County Station Monthly and Annual Precipitation Totals and Averages (inches)*2010 -2014 Average 2010 2011 2012 2013 2014 (for month)January 0.40 0.10 0.37 2.40 1.36 0.93 February 0.05 0.96 0.87 1.08 1.34 0.86 March 1.70 1.55 1.83 0.86 0.85 1.36 April 2.06 4.15 1.15 6.29 3.08 3.35 May 4.08 4.40 5.92 6.56 3.75 4.94 June 7.85 5.88 2.23 5.44 8.04 5.89 July 1.95 0.90 0.58 1.15 2.21 1.36 August 1.31 1.69 4.14 3.43 8.25 3.76 September 2.84 3.20 2.88 0.57 3.54 2.61 October 1.33 0.91 3.72 3.67 2.40 2.41 November 1.37 3.40 0.86 2.00 1.38 1.80 December 1.45 2.04 0.75 0.61 1.03 1.18 Annual 26.39 29.18 25.3 34.06 37.23 Total* Some data were missing -actual precipitation may be underreported.

SOURCE: Table 12, LSCS Meteorological Monitoring Program annual reports (2010 to 2014)c. Seasonal and annual summary wind statistics in the form of wind direction and speed frequency distribution tables and wind roses are provided by season and for the year in each LSCS Meteorological Monitoring Program annual report, Tables 7 through 11.Copies of the annual reports for the years 2010 through 2014 are attached.Table 3 below presents the predominant quarterly and annual wind speeds and directions at the 375-fQot level for years 2010 through 2014. The predominant wind direction at the LSCS site was west-northwest (WNW) during three of the five years from 2010 through 2014 and south-southwest (SSW) during the remaining two years. Wind speed at the 375-foot level was between 7.6 and 24.5 mph approximately 73 % of the time during 2010 through 2014, and was greater than 12.5 mph approximately 70% of the time.Each LSCS Meteorological Monitoring Program monthly report contains the mean and maximum recorded wind speeds for the month. Table 4 (below) summarizes these data 2 at the meteorological tower 33-ft elevation and indicates the average of the monthly mean wind speeds at that elevation for each year from 2010 through 2014. Table 4 also shows the maximum wind speed recorded at the meteorological tower 33-ft elevation during each year from 2010 through 2014. At that elevation, the highest recorded wind speed during that period occurred in February 2011 and was 37.2 mph.Table 3 LaSalle County Station Quarterly and Annual Wind Speed and Direction at 375 feet 2010 -2014 2010 Speed % Direction

%(mph)1st Qtr 12.6 to 18.5 33.6 NW 14.00 2nd Qtr 12.6 to 18.5 28.48 SSW 8.76 3rd Qtr 12.6 to 18.5 32.07 SSW 14.23 4th Qtr 12.6 to 18.5 28.48 WNW 11.15 Annual 12.6 to 18.5 30.61 WNW 9.40 2011 2012 Speed % % Speed % Direction

%(mph) (mph)1st Qtr 12.6 to 18.5 30.1 NW 12.58 > 24.5 28.07 WNW 13.16 2nd Qtr 12.6 to 18.5 28.17 SSW 8.99 12.6 to 18.5 33.27 SSW 11.69 3rd Qtr 7.6 to 12.5 31.2 SW 8.07 12.6 to 18.5 34.99 SSW 9.32 4th Qtr 12.6 to 18.5 29.95 SSW 16.22 12.6 to 18.5 30.49 SSW 13.98 Annual 12.6 to 18.5 29.27 SSW 9.63 12.6 to 18.5 31.01 SSW 11.26 2013 2014 Speed % Direction

% Speed % Direction

%(mph) (mph)lstQtr 12.6 to 18.5 27.21 WNW 16.64 12.6 to 18.5 27.91 WNW 14.09 2nd Qtr 12.6 to 18.5 31.99 SSW 10.34 12.6 to 18.5 32.37 S 9.80 3rd Qtr 12.6 to 18.5 35.85 SW 13.49 12.6 to 18.5 31.60 SSW 9.73 4th Qtr 12.6 to 18.5 35.58 WNW 12.18 12.6 to 18.5 29.63 WNW 15.66 Annual 12.6 to 18.5 32.72 -WNW 9.84 12.6 to 18.5 30.39 WNW 11.06 SOURCE: LSCS Meteorological Monitoring Program annual reports (2010 to 2014)3 Table 4 LaSalle County Station Monthly Maximum and Mean Wind Speeds (mph) at 33 feet 2010 -2014 2010 2011 2012 2013 2014 Max Mean Max Mean Max Mean Max Mean Max Mean January 25.9 11.4 25.0 10.8 34.0 12.7 30.9 12.9 35.1 14.9 February 24.4 9.9 37.2 12.4 29.8 11.5 30.5 12.8 35.4 15.4 March 21.9 9.4 26.4 11.3 33.2 13.0 29.8 11.6 31.7 11.9 April 32.4 12.1 34.5 13.8 32.5 12.6 29.6 12.7 30.1 12.9 May 29.9 10.6 28.6 10.7 32.4 10.7 26.2 10.5 28.2 11.0 June 24.3 8.5 23.6 10.0 20.3 9.4 21.5 8.8 28.9 9.6 July 22.8 7.5 21.8 7.3 18.0 7.9 17.0 7.4 24.0 8.1 August 17.6 7.0 20.4 7.0 17.2 7.1 17.0 6.9 17.2 7.2 September 26.6 9.9 26.2 8.7 22.1 8.7 17.9 8.1 20.7 7.5 October 35.4 10.6 26.3 9.4 35.2 11.6 20.7 9.3 28.6 9.7 November 29.6 11.8 33.1 13.1 31.2 9.1 33.0 12.2 29.0 13.0 December 30.2 11.2 28.7 10.6 35.5 11.3 22.9 11.1 22.9 10.0 Average Mean Wind Speed (mph) 10.0 10.4 10.5 10.4 10.9 (for year)Max Recorded Wind Speed (mph) 35.4 37.2 35.5 33.0 35.4 (for year)Source: Monthly Reports on Meteorological Monitoring Program at the LaSalle County Nuclear Station (2010 to 2014)List of Attachments:

1. 2010 Annual Report on the Meteorological Monitoring Program at the LaSalle County Nuclear Power Station 2. 2011 Annual Report on the Meteorological Monitoring Program at the LaSalle County Nuclear Power Station 3. 2012 Annual Report on the Meteorological Monitoring Program at the LaSalle County Nuclear Power Station 4. 2013 Annual Report on the Meteorological Monitoring Program at the LaSalle County Nuclear Power Station 5. 2014 Annual Report on the Meteorological Monitoring Program at the LaSalle County Nuclear Power Station 4 RAI # MA-01 ATTACHMENT 1

I"I Annual Report on the Meteorological Monitoring Program at the LaSalle County Nuclear Power Station 2010 prepared for Exelon Nuclear Warrenville, IL 60555 by Murray and Trettel, Incorporated 600 First Bank Drive, Suite A Palatine, IL 60067 (847) 963-9000 e-mail: mta)weathercommand.com For Exelon Us qnly Reviewed By: Date: 20 C.Murray & 7)rettel, Inc.600 First Bank Driue, Suite A Palatine, Illinois 60067 (847) 963-9000 i Table of Contents Section Description Page List of Tables .....................................................................................

ii I Introduction

.............................................................................................

1 2 Sum m ary .............................................................................................

2 3 Data Acquisition

................................................................................

3 4 Data Analysis .....................................................................................

5 5 Results ............................................................................................

10 Site Calibration logs ...................................................................

Appendix Murray & Trettel, Inc. 6oo FirstBank Drive, SuiteA Palatine, Illinois 6o067 (847) 963-9000 ii List of Tables Number Description Page 1 Instrument Locations

..........................................................................

4 2 Data Loggers .....................................................................................

4 3 W ind Direction Classes .........................................................................

7 4 W ind Speed Classes .........................................................................

7 5 Atmospheric Stability Classes ..........................................................

8 6 Data Recovery Summary ...............................................................

11 7 W ind Rose, January-March 2010 ..................................................

14 8 W ind Rose, April-June 2010 ............................................................

16 9 W ind Rose, July-September 2010 ..................................................

18 10 W ind Rose, October-December 2010 ............................................

20 11 W ind Rose, January-December 2010 .............................................

22 12 Precipitation Totals .........................................................................

24 13 Maximum Doses Resulting From Airborne Releases ....................

25 Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 Introduction The purpose of the meteorological program being conducted at the LaSalle County Station site is to provide information sufficient to assess the local weather conditions and to determine the degree of atmospheric dispersion of airborne radioactive effluent from the station.The meteorological tower is 400 ft. high and is instrumented at three levels. Wind speed and direction are measured at 33 ft., 200 ft., and 375 ft. Ambient temperature is measured at 33 ft. Differential temperatures, referenced to 33 ft., are measured at 200 ft.and 375 ft. Precipitation is measured at approximately 10 ft.Joint frequency stability wind rose tables of wind direction, wind speed, and stability are routinely tabulated from hourly measurements.

The quarterly and annual tables are included in this report.Descriptions of the instruments and digital recorder are given in Section 3 (Data Acquisition) of this report. Data reduction and processing are described in Section 4 (Data Analysis).

The results given in Section 5 of this report include modeled maximum whole body doses, skin doses, organ doses based upon airborne releases, and site meteorology.

0 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 2. Summary The LaSalle Station meteorological monitoring program produced 78,407 hours0.00471 days 0.113 hours 6.729497e-4 weeks 1.548635e-4 months of valid data out of a possible 78,840 parameter hours during 2010 (355 days x 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months s/day x 9 measured priority parameters), which represents an overall data recovery rate of 99.5%. Priority parameters are all parameters except precipitation.

The stability wind rose tables included in this report have been generated using the 375 ft. wind data with the 375-33 ft. differential temperature data.The maximum annual calculated cumulative doses resulting from airborne releases were as follows.LaSalle County Generating Station: gamma air dose beta air dose whole body dose skin dose organ (infant thyroid)3.660 x 10-3 mrad 1.340 x 10 3 mrad 1.169 x 10 2 mrem 3.910 x 10.3 mrem 6.567 x 10"' mrem Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 3. Data Acquisition Wind speed and direction are measured with Climatronics F460 wind sensors. The wind speed sensors have a starting speed of 0.5 mph (0.22 mps), a range of 0 to 100 mph (0 to 44.7 mps), and a system accuracy of +/-1.0 mph at 100 mph (+/-0.45 mps at 44.7 mps). The wind direction sensors have a threshold speed of 0.5 mph (0.22 mps), a range of 0 to 5400, and a system accuracy of +/-50.Ambient and differential temperature are measured with the Climatronics 100093 system.Ambient temperature is measured within the range of -22 to 1226F (-30 to 500C) with an accuracy of +/-0.5 0 F (-+0.30C).

Differential temperature is measured within the range of-10 to 10°F (-5.6 to 5.6 0 C) with an accuracy of +/-0.18 0 F (+/-0.10°C).

Precipitation is measured with a Climatronics 100097 tipping bucket rain gauge and is measured in increments of one one-hundredth of an inch with a system accuracy of +/-1%for rain rates of 1-3"lhr and +/-3% for rain rates of 3-6"lhr.Instrument types and locations are summarized in Table 1.The meteorological data are collected and stored by a Microtel 4.0 data acquisition system. The Microtel measures the analog voltages of the instruments and records the digital equivalent within the range of 0 to +5 volts. The Microtel has the capability of storing 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months of minute data and one week of hourly data. Data are obtained from the Microtel by a direct dial telephone hookup to an in-house computer system. Data are sampled every second.As a backup to the Microtel, data are also recorded with a Johnson Yokogawa Corp. digital recorder (JYC DA100 data acquisition unit and Contec IPC-PT/M300(PC)WOU PC). Data are sampled every 10 seconds.Data loggers are summarized in Table 2.Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Irlinois 60067 (847)963-9ooo Table I Instrument Locations Measurement Wind Speed Wind Direction Differential Temperature Wind Speed Wind Direction Differential Temperature Wind Speed Wind Direction Ambient Temperature Sensor Type Climatronics 100075 F460 Climatronics 100076 F460 Climatronics 100093 Climatronics 100075 F460 Climatronics 100076 F460 Climatronics 100093 Climatronics 100075 F460 Climatronics 100076 F460 Climatronics 100093 Climatronics 100097-1 Tipping Bucket Rain Gage Location Tower Tower Tower Tower Tower Tower Tower Tower Tower Elevation 375 ft.375 ft.375 ft.200 ft.200 ft.200 ft.33 ft.33 ft.33 ft.Precipitation Meteorological shelter roof 10 ft.Table 2 Data Loggers Sampling Measurement Logger Tyoe Frequency Winds, Temperatures, Microtel 4.0 data acquisition system 1 sec.and Precipitation Winds, Temperatures, Johnson Yokogawa Corp. Digital Recorder 10 sec.and Precipitation (JYC DA100 and Contec IPC-PT/M300(PC)WOU) digital recorder Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9ooo 4. Data Analysis The LaSalle Microtel is routinely interrogated to obtain hourly average data, The data are then stored in the meteorological data base and listings of the data are generated.

The data listings are examined by qualified personnel and any apparent problems are brought to the attention of the Project Manager or Meteorological Technician and the Instrument Maintenance staff.Hourly values of wind speed, wind direction, ambient temperature, differential temperature, and precipitation are obtained through measurements taken at the site.The standard deviation of wind direction (sigma) is derived. The wind direction variation is described in terms of the standard deviation of the direction about the mean direction.

The Microtel computes an hourly value of wind sigma by taking the Root-Mean-Square (RMS) of the four quarter-hour wind sigma values. The Microtel quarter-hour wind sigma values are calculated directly from the one second wind direction samples during the 15 minute period.The data base files are edited approximately once a week. Missing Microtel values are replaced with digital recorder values, when available.

Invalid data are deleted from the data base.Murray & Trettel, Inc. 6oo First Bank Driue, Suite A Palatine, Illinois 60067 (847)963-90oo When an hourly value is missing or invalid, the numeral 999 is entered into the computer data file in the appropriate location.

When the wind direction changes substantially relative to its short term fluctuations, the numeral 888 can be entered into the wind sigma location to indicate shifting winds. When the wind blows with velocities near the sensing threshold of the instrument, the numeral 777 can be entered into the wind direction, wind speed, and wind sigma locations to indicate light and variable winds.A professional meteorologist reviews the data, calibration findings, equipment maintenance reports, and other information and determines which data are valid. Only the valid data are retained in the data base.As a quality control measure, a monthly comparison is made of Microtel and digital recorder data. An investigation is made into the reasons for any significant differences between the sets of values.Joint frequency stability wind rose tables of hourly data measured at the site are generated.

These tables indicate the prevailing wind direction, wind speed, and stability classes measured during the period of observation as well as the joint frequencies of occurrence of the wind direction, wind speed, and stability classes. The values are also used as input to the atmospheric transport and diffusion models. Wind direction, wind speed, and stability classes are given in Tables 3, 4, and 5.Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9ooo Table 3 0 Wind Direction Classes IF IF IF IF IF IF IF IF IF IF IF IF IF IF IF IF 348.750 < WD <11.250 < WD <33.750 < WD <56.250 < WD <78.750 < WD <101.250 < WD <123.750 < WD <146.250 < WD <168.750 < WD <191.250 < WD <213.750 < WD <236.250 < WD <258.750 < WD <281.256 < WD <303.750 < WD <326.250 < WD <11.250 THEN Class is 33.750 THEN Class is 56.25° THEN Class is 78.750 THEN Class is 101.250 THEN Class is 123.750 THEN Class is 146.250 THEN Class is 168.750 THEN Class is 191.250 THEN Class is 213.750 THEN Class is 236.250 THEN Class is 258.750 THEN Class is 281.250 THEN Class is 303.750 THEN Class is 326.250 THEN Class is 348.750 THEN Class is N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Table 4 Wind Speed Classes IF 0.0 mph < WS < 0.5 mph THEN Class is IF 0.5 mph < WS < 3.5 mph THEN Class is IF 3.5 mph < WS < 7.5 mph THEN Class is IF 7.5 mph < WS < 12.5 mph THEN Class is IF 12.5mph < WS < 18.5mph THEN Classis IF 18.5 mph < WS < 24.5 mph THEN Class is IF 24.5 mph < WS THEN Class is 1 2 3 4 5 6 7 Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9000 Table 5 Atmospheric Stability Classes Differential Temperature Interval Class (in 0 C/100m) (1)Differential Temperature Interval (in OF over the 200-33ft ranae1 (2)Differential Temperature Interval (in OF over the 375-33ft.

ran-ge) (2)Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable AT-1.9 < AT-1.7 < AT-1.5 < AT-0.5 < AT 1.5 < AT 4.0 < AT ,< -1.9< -1.7< -1.5_ -0.5* 1.5< 4.0-1.8<-1.6<-1.4 <-0.5 <1.3<3.6<AT <AT <AT <AT <AT <AT <AT-1.8-1.6-1.4-0.5 1.3 3.6-3.6 <-3.2 <-2.9 <-1.0 <2.8 <7.5 <AT AT AT AT AT AT AT-3.6-3.2-2.9-1.0 2.8 7.5 (1J from ANSI/ANS 2.5 (!from ANSI/ANS 2.5 (2j ANSI/ANS 2.5 intervals scaled for instrument heights on the LaSalle meteorological tower Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 6oo67 (847) 963-9000 The following two programs were used to calculate doses resulting from radioactive releases: 1. XOQDOQ: Computer Program for the Meteorological Evaluation of Routine Effluent Releases at Nuclear Power Stations (NUREG/CR-2919).

The program is based on the theory that material released to the atmosphere will be normally distributed (Gaussian) about the plume centerline.

A straight-line trajectory is assumed between the point of release and all receptors.

The program implements the assumptions outlined in Section C of NRC Regulatory Guide 1.111. In evaluating routine releases from nuclear power plants, it primarily is designed to calculate annual relative effluent concentrations, XlQ values and annual average relative deposition, D/Q values.Output from the XOQDOQ program is used as input to the GASPAR program.2. GASPAR II: A Code System for Evaluation of Radiological Impacts Due to the Release of Radioactive Material to the Atmosphere During Normal Operation of Light Water Reactors (NUREG-0597).

GASPAR is a program written for the evaluation of radiological impacts due to the release of radioactive material to the atmosphere during normal operation of reactors.

The GASPAR code implements the radiological impact models of NRC Regulatory Guide 1.109, Revision 1, for atmospheric releases.

The program is used to estimate the maximum individual doses at selected locations in the vicinity of the plant.Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine,1.flinois 60067 (847)963-9000 5. Results 5.1 Instrument Maintenance The maintenance program followed during 2010 was composed of routinely scheduled visits, preventative maintenance procedures, and equipment repairs.Routine monthly visits were made to inspect the sensing and recording systems for proper operation.

In addition, routine maintenance and calibration checks of all tower-mounted and ground level equipment were performed every four months. A description of the calibration and field procedures is found in the Murray and Trettel, Inc. "P1009 Procedures Manual" (July 2010).In January, there was some 200 ft. and 375 ft. wind speed data loss due to icing.Falling ice damaged the 200 ft. wind speed cups. The cups and sensor were replaced.In February, 2 bad current cards found during the calibration were repaired and replaced.In April, the annual tower inspection was performed.

In October, the 375 ft. heat lamp assembly was replaced.In November, a failed 33 ft. temperature aspirator motor was replaced.

The failure led to some data loss, including delta-T data.No other significant problems were encountered with the equipment, and at the end of the annual period, no problems were evident at the site.Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9000 5.2 Data Recovery The record of data recovery for the year is summarized in Table 6.Table 6 LaSalle Site Data Recovery Summary 2010 Recovered Elevation Hours Measurement Wind Speed Wind Speed Wind Speed Wind Direction Wind Direction Wind Direction Ambient Temperature Differential Temperature Differential Temperature Precipitation 33 ft.200 ft.375 ft.33 ft.200 ft.375 ft.33 ft.200-33 ft.375-33 ft.lOft.8745 8613 8621 8753 8753 8753 8723 8723 8723 8626 Recovered Percent 99.8 98.3 98.4 99.9 99.9 99.9 99.6 99.6 99.6 98.5 Lost Hours 15 147 139 7 7 7 37 37 37 134 Percent Changed 0.2 1.6 1.5 0.8 0.4 2.4 0.4 0.7 1.8 1.6 AVERAGE*99.6* average of priority parameters (all except precipitation)

Valid Recovered Hours Percent Lost Hours 45 177 169 Lower Level Joint Frequency

%Middle Level Joint Frequency

%Upper Level Joint Frequency

%8715 8583 8591 99.5 98.0 98.1 Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9000 @ 5.3 Summary of Billings for Equipment Repairs, Replacement Parts, and Other Work not Included in Fixed-Cost Maintenance Agreement

-2010 Description

-LaSalle Januar Meteorological equipment maintenance Meteorological parts, materials, and contractor services February Meteorological equipment maintenance Meteorological parts, materials, and contractor services March Meteorological equipment maintenance Meteorological parts, materials, and contractor services Special Request Meteorological parts, materials, and contractor services May Special Request June Meteorological equipment maintenance Meteorological parts, materials, and contractor services JUlN Meteorological parts, materials, and contractor services August-none-.Cost$ 2,824.35 786.82 976.65 342.77 0.00 37.76 120.00 398.56 600.00 302.50 0.00 32.34 0.00 158.16 80.00 September Meteorological parts, materials, and contractor services Special Request October Meteorological equipment maintenance November Meteorological equipment maintenance December-none-536.25 800.25 0.00 Annual Total: $ 7,996.41 Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 5.4 Stability Wind Rose Data The quarterly and annual stability wind roses are given in Tables 7 through 11. Wind speed classes have been altered to reflect the sensor threshold.

For the year, winds measured at 375 ft. mostfrequently came from the West-Northwest (9.41%) and fell into the 12.6-18.5 mph wind speed class (30.61%).

Calms (wind speeds at or below the sensor threshold) were measured 0.00% of the time and speeds greater than 24.5 mph were measured 13.69% of the time.Stability based on the 375-33 ft. differential temperature most frequently fell into the neutral classification (47.79%).Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9ooo TABLE 7-14-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction January-March.

2010 375Ft-33Ft Oeita-T (F)Number of Observations

-2036 Values are Percent Occurrence SPEED----------------------------------

WIND DIRECTION CLASSES---------

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU MU C SU A N L SS MMS ES EU MK 1 SU-N 3 SS MS ES EU SU N 7 SS MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.29 0.10 0.00 0.05 0.00 0.00 0.00 1.96 0.29 0.00 0.34 0.00 0.05 0.15 1.72 0.08 0.25 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.69 0.20 0.00 0.05 0.00 0.00 (1.00 2.26 0.69 0.05 0.05 0.00 0.00 0.10 2.55 0.44 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.15 0.15 0.15 0.00 0.00 0.00 0.00 0.25 0.20 0.00 0.10 0.00 0.00 0.25 1.28 0.44 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.34 0.05 0.05 0.05 0.00 0.00 0.00 0.25 0. 20 0.00 0.00 0.00 0.00 0.00 0.83 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.10 0.05 0.00 0.00 0.00 0.00 0.00 0.49 0.10 0.00 0.05 0.00 0.00 0.00 0.69 0.69 0.00 0.00 0.00 0.00 0.00 0.74 0.49 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.34 0.15 Coo 0.00 0.00 0.00 0.00 0.74 0.25 0.00 0.00 0.00 0.00 0.00 0.83 0.05 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0. 15 0.05 0.05 0.00 0.00 0.00 0.05 0.98 0.15 0.05 0.00 0.00 0.00 0.05 0.93 0.39 0.29 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0. 05 0.15 0.00 0.00 0.00 0.00 0.00 0.59 0.44 0.00 0.00 0.00 0.00 0.00 0,29 0.25 01.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.15 0.00 0.00 0.00 0.00 0,00 0.00 0.44 0.25 0.00 0.00 0.00 0.00 0.00 0.25 0.10 0.05 0.00 0.00 0.00 0.00 0.29 0.20 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.15 0.05 0.00 0.00 0.00 0.00 0.00 0.10 0.15 0.00 0.00 0.00 0.00 0.00 0.25 0.15 0.00 0.00 0.00 0.00 0.00 0.25 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.20 0.15 0.00 0.00 0.00 0.00 0.00 0.29 0.25 0.00 0.00 0.00 0.00 0.00 0.64 0.10 0,05 0.00 0.00 0.00 0.00 0.10 0.20 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.10 0.05 0.00 0.00 0.00 0.00 0.00 0.25 0.15 0.00 fl. 00 0.00 0.00 0.00 0.39 0.00 0.00 0.00 0.00 0.00 0.00 1.08 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.39 0.15 0.05 0.00 0.00 0.00 0.00 0.69 0.29 0.05 0.00 0.00 0.00 0.00 1.38 0.34 0.10 0.20 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.29 0.10 0.05 0.00 0.00 0.00 0.00 1.47 0.49 0.29 0.00 0.00 0.00 0.00 3.63 1.96 0.54 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.25 0.44 0.05 0.00 0.00 0.00 0.00 1.33 0.54 0.44 0.05 0.00 0.00 0.00 1.96 1.33 0.93 0.64 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.00 0.05 0.00 0.00 0.00 0.25 0.10 0.10 0.00 0.00 0.00 0.00 0.64 0.05 0.15 0.15 0.00 0.00 0.00 1.57 1.08 0.39 0.83 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.83 0.54 0.05 0.05 0.00 0.00 0.00 0.05 4.76 2.50 0.49 0.20 0.00 0.00 0.00 0.05 13.36 4.62 1 13 0.69 0.00 0.00 0.05 0.54 19.45 8.30 3.09 2.16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.83 0.54 0.05 0.05 1.52 0.00 0.00 0.05 4.76 2.50 0.49 0.20 8.01 EU MU 8 SU-N 1 SS 2MS ES EU I MU 3 SU-N 1 SS 8MS 0.00 0.05 13.36 4.62 1.13 0.69 19.84 0.05 0.54 19.45 8.30 3.o9 ES 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.10 0.20 2.16 33 60 Murray & Tretrte, Inc. 600 First Bank Drve, Suite A Palatine, Illinois 60067 (847) 963.9000 TABLE 7 continued LaSalle County Generating Statlo 375 ft. Wind Speed and Direction-15-January-March.

2010 375Ft-33Ft Delta-T (F)SPEED --------------.-------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

EU Iii SU N SS MS ES TOTAL CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU I MU 9 SU-N 2 SS 4MKS ES EU G MU T SU N 2 SS 4MS ES 0.00 0,00 0.00 0.10 0.29 0.34 0.34 0.00 0.00 0.00 0.20 0.00 0.10 0.00 0.00 0.00 0.10 3.00 0.05 0.00 0.00 0.00 0.00 0.00 0.59 0.15 0.00 0.00 0.00 0.05 0.15 1.62 0.15 0.05 0.00 0.00 0.05 0.15 0.49 0.15 0.00 0.00 0.00 0.00 0.00 1.03 0.00 0.00 0.00 0.00 0.00 0.00 0.15 0.00 0.00 0.00 0.00 0.05 0.00 0.49 0.59 0.20 0.00 0.10 0.05 0.05 0.10 0.20 0.00 0.00 0.00 0.00 0.00 0.54 0.00 0.20 0.05 0.00 0.00 0.00 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.44 0.29 0.44 0.05 0.00 0.00 0.00 0.15 0.88 0.25 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.10 0.00 0.00 0.00 0.00 0.34 0.25 0.10 0.00 0.00 0.15 0.25 0.10 0.05 0.29 0.00 0.00 0.00 0.00 0.59 0.00 0.00 0.00 0.00 0.15 0.10 0.15 0.05 0.05 0.00 0.00 0.10 0.20 0.54 0.29 0.00 0.00 0.00 0.00 0.15 0.39 0.10 0.00 0.00 0.00 0.00 0.20 0.64 0.63 0.00 0.00 0.00 0.10 0.49 0.20 0.39 0.10 0.00 0.00 0.05 0.10 0.00 0.05 0.00 0.00 0.00 0.25 1.23 0.34 0.15 0.15 0.00 0.00 0.00 0.64 0.49 0.05 0.00 0.00 0.00 0.00 1.08 0.83 0.15 0.00 0.00 0.00 0.00 0.39 0.25 0.00 0.00 0.00 0.00 0.00 2.70 1.52 0.69 0.10 0.00 0.00 0.00 0.54 0.39 0.00 0.00 0.00 0.00 0.00 0.34 1.08 0.49 0.05 0.00 0.00 0.00 0.74 0.20 0.00 0.05 0.00 0.00 0.10 0.88 13.56 6.04 3.29 1.28 0.10 0.10 0.10 0.34 4.47 4.91 1.82 0.15 0.10 0.88 13.56 6.04 3.29 1.28 25.15 0.10 0.34 4.47 4.91 1.82 0.15 11.89 TOT 7.61 10.95 5.80 3.09 5.35 3.39 5.70 2.90 3.54 2.70 4.37 3.63 6.97 11.69 14.00 8.30 100.00 0.10 0.25 1.92 56.43 26.92 9.87 4.52 100.00 Wind Direction by Stability N NNE NE rNE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.05 0.15 4.27 1.62 0.69 0.83 0.00 0.00 0 20 9.09 1.52 0.05 0.10 0.00 0.10 0.54 3.78 1.08 0.20 0.10 0,00 0,00 0,00 2.65 0.34 0.05 0,05 0.10 0.10 0.05 2.60 2.11 0.34 0.05 0.00 0.00 0.00 2.50 0.54 0.29 0.05 0.00 0.00 0 15 2.65 1.77 1.08 0.05 0.00 0.00 0.00 0.98 1.28 0.34 0.29 0.00 0.00 0.20 1.38 1.23 0.25 0.49 0.00 0.00 0.25 1.03 1.03 0.34 0.05 0.00 0.00 0.00 1.57 1.72 1.08 0.00 0.00 0.00 0.15 2.41 0.54 0.44 0.10 0.00 0.00 0.25 4.32 1.67 0.39 0.34 0.00 0.00 0.00 6.8B 3.68 1.03 0.10 0.00 0.00 0.00 6.78 4.27 2.16 0.79 0.00 0.00 0.00 3.54 2.50 1.13 1.13 0.10 0.25 1.92 56.43 26.92 9.87 4.52-STABILITY CLASSES-Extranely UnsLable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extrenaely Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.05 0.44 2.60 3.1.4 1.08 0.29 0.00 0.00 0.93 3.05 3.09 3.14 0.74 0.00 0.00 0.44 0.54 1.96 2.01 0.83 0.00 0.05 0.49 0.44 0.93 1.03 0.15 0.00 0.15 0.64 1.38 1.38 1.33 0.49 0.00 0.05 0.49 0.98 0.98 0.79 0.10 0.00 0.00 0.29 1 23 1.67 1.23 1.28 0.00 0.10 0.20 1.03 0.74 0.15 0.69 0.00 0.20 0.69 0.39 0.83 0.83 0.59 0.00 0.20 0.25 0.39 0.25 0.49 1.13 0.00 0.34 0.54 0.79 0.39 0.64 1.67 0.00 0.15 0.39 0.39 1.23 1.28 0.20 0.00 0.05 0.59 1.03 2.01 2.11 1.18 0.00 0.05 0.44 2.26 6.24 2.06 0.64 0.00 0.10 0 74 2.36 4.86 5.01 0.93 0.00 0.05 0.44 0.98 3.88 1.96 0.98 0.00 1.52 8.01 19.84 33.60 25.15 11.89-WIND SPEED CLASSES-CAL LM< 3.5 mph 3.6 -7,5 ,ph 7,6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph Mu1Tal & Trettel, Inc. 600 First Bank Drie, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 8-16-LaSalle County Generating Statio 375 ft. Wind Speed and Direction April-June.

2010 375F-33Ft Delta-T (F)Number of Observations

-2184 Values are Percent Occurrence SPEED----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NA NNW TOTAL EU MU SU N SS MS ES TOTAL EU MU C SU A N L SS MMS ES EU MU I SU-N 3 SS MS ES EU~HU SU 7 S5 MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.64 0.14 0.14 0.00 0.00 0 00 0.00 0.69 0.09 0.32 0.00 0.00 0.00 0.00 0.41 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.60 0.18 0.05 0.00 0.00 0.00 0.00 1.60 0.14 0.18 0.00 0.00 0.00 0 05 0.69 0.82 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.69 0.37 0.05 0.00 0.00 0 00 0.00 1.05 0.78 0.09 0.00 0.00 0.05 0.05 1.60 0.73 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 O.M0 0.00 0.00 0.00 0.00 0.55 0.46 0.00 0.00 0.00 0.00 0.00 0.96 0.87 0.00 0.00 0.00 0.00 0.00 1.37 1.01 0.05 0.00 0.00 0,00 0,00 0,00 0.00 Q000 0.00 0.00 0.00 0.00 0,00 0,05 0.00 0.00 0.00 0.00 0.00 0.41 0.18 0.05 0.00 0.00 0.00 0.00 0.92 0.73 0.09 0.00 0.00 0.00 0.00 0.60 1.01 0.05 0.00 0.00 0.00 0.00 0.00 O.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.78 0.09 0.05 0.00 0.00 0.00 0.00 0.50 0,27 0.18 0.00 0.00 0.00 0.00 0.46 0.69 0.18 1. 00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.09 0.00 0.00 0.00 0.00 0.00 0.23 0.14 0.14 0.00 0.00 0.00 0.00 0.64 0.41 0.32 0.00 0.00 0.00 0.00 0.00 O.M0 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0,09 0.00 0.09 0.00 0.00 0.00 0.00 0.87 0.14 0.09 0.00 0.00 0.00 0.00 0.46 0.23 0.32 0.14 0.00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.05 0.00 0.00 0.00 0.00 0.32 0.14 0.09 0.00 0.00 0.00 0.00 0.87 0.14 0.09 0.05 0.00 0.00 0.00 0.78 0.60 0.69 0,14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.00 0.00 0.00 0.00 0.32 0.00 0.05 0.00 0.00 0.00 0.00 0.92 0.18 0.05 0.05 0.00 0.00 0.05 0 73 0.60 0.41 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.32 0.09 0.09 0.09 0.00 0.00 0.00 1.37 0.50 0.14 0.05 0.00 0.00 0.05 0.78 0.64 0.32 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.46 0.09 0.05 0,00 0.00 0.00 0.00 0.55 0,50 0.14 0.00 0.00 0.00 0.00 0.96 1.10 0.14 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.05 0.00 0.00 0.00 0.00 0.41 0.18 0.23 0.00 0.00 0 00 0.00 0,87 0.41 0.37 0.09 0.00 0.00 0.00 1.05 0.96 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.23 0.09 0.00 0.00 0.00 0.00 0.00 1.01 0.23 0.09 0.00 0.00 0.00 0.05 1.01 0.55 0.32 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 (0.00 0.32 0.14 0.00 0.00 0.00 0.00 0.00 0.50 0.55 0.00 0 00 0.00 0.00 0.00 0.02 0.55 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.14 0.00 0.00 0.00 0.00 0.55 0.32 0.00 0.00 0.00 0.00 0.00 0.78 0. 05 0.05 0.00 0.00 0.00 0.00 0.50 0.50 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.55 0.46 0.41 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.55 0.46 0.41 0.00 1.42 0,00 0.00 0.00 0,00 6.96 2.56 0.92 0.09 0.00 0.00 0.00 6.96 2.56 0.92 0.09 10.53 EU MU 8 SU-N I SS 2 MS ES EU I MU 3 SOl-N 1 SS 8 MS ES 0.00 0.00 0.00 0.00 13.69 5.72 2.01 0.23 0.00 0.00 0.05 0.23 12.87 10.90 3,89 0.55 0.00 0.00 13.69 5.72 2.01 0.23 21.66 0.05 0.23 12.87 10.90 3.89 0.55 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963.9000 TABLE 8 continued LaSalle County Generating Statlo 375 ft. Wind Speed and Direction-17-April-June.

2010 375Ft-33Ft Delta-T (F)SPEED ----------------------------------

WIND DIRECT[ON CLASSES --------------------.-------------

.........

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU I MU 9 SU-N 2 SS 4MS ES EU G MU T SU N 2 SS 4M5 ES 0.00 0.00 0.00 0.64 0.05 0.00 0.00 0.00 0.00 0,00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0,37 0.27 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.87 0.05 0.00 0.00 0.00 0.00 0.00 0.27 0.00 0.00 0.00 0.00 0.00 0.00 1.28 0.46 0.00 0.00 0.00 0,00 0.00 0.46 0.00 0.00 0.00 0.00 0.00 0.00 0.87 0.46 0.09 0.00 0.00 0.00 0.00 0.32 0.37 0.05 0.00 0.00 0.00 0.00 0.82 0.64 0.37 0.00 0.00 0.00 0.00 1.14 0.50 0.05 0.00 0.00 0.00 0.00 0.60 0.37 0.37 0.00 0.00 0.00 0.00 0.64 0.32 0.27 0.00 0.00 0.00 0.00 0,05 0.05 0.23 0.09 0.00 0.00 0.00 0.09 0.27 0.18 0.00 0.00 0.00 0.00 0.23 0.37 0.46 0.18 0.05 0.18 0.18 0.46 1.01 0.00 0.05 0.00 0.05 0.14 0.46 0.46 0.32 0.14 0.00 0.14 0.27 1.05 1.79 0.14 0.32 0.00 0.00 0.09 0.92 1.33 0,05 0.00 0.00 0.05 0.23 0.41 0.50 0.27 0.10 0.00 0.00 0.00 0.78 0.37 0.23 0.00 0.00 0.00 0.09 0.18 0.09 0.09 0.00 0.00 0.00 0.00 0.73 1.10 0.14 0.00 0.00 0.00 0.00 0.32 0.18 0.00 0.00 0.00 0.00 0.00 1.37 0.64 0.09 0.00 0.00 0.00 0.00 0.14 1.01 0.00 0.00 0.00 0.00 0.00 1.05 0.73 0.09 0.00 0.00 0.00 0.00 0.60 0.00 0.00 0.00 0.00 0.00 0.00 0.92 0.14 0.00 0.00 0,00 0.00 0.00 0.09 0.05 0.00 0.00 0.00 0.00 0.09 0.32 11.95 7.46 2.52 0.41 0.05 0.05 0.37 0.78 6.23 6.14 1.05 0.55 0.09 0.32 11.95 7.46 2.52 0.41 22.76 0.37 0.78 6.23 6.14 1.05 0.55 15.16 TOT 3.75 5.22 6.91 7.46 6.23 6.78 4.85 3.53 7.19 8.75 8.61 6.04 7.69 6.91 5.63 4.44 100.00 0.05 0.50 1.33 52.24 33.24 10.81 1.83 100.00 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TO[AL 0.00 0.00 0.00 2.43 0.87 0.46 0.00 0.00 0.00 0.05 3.34 1.42 0.41 0.00 0.00 0.09 0.14 4.49 1.92 0.27 0.00 0 00 0.00 0.00 4.62 2.79 0.05 0 00 0.00 0.00 0.00 3.11 2.79 0.32 0.00 0.00 0.00 0.00 3.75 2.20 0.82 0.00 0.00 0.00 0.00 2.43 1.33 1.10 0.00 0.00 0.00 0.00 1.69 0.69 0.92 0.23 0.05 0.18 0.18 2.70 2.29 1.37 0.41 0.00 0.18 0.46 3.48 3.07 1.05 0.50 0.00 0.05 0.37 3.80 3.11 0.92 0.37 0.00 0.00 0.09 2.98 2.15 0.64 0.18 0.00 0.00 0.00 3.39 2.93 1.28 0.09 0.00 0.00 0.05 3.75 2.56 0.50 0.05 0.00 0.00 0.00 3.39 1.97 0.27 0.00 0.00 0.00 0.00 2.88 L.14 0.41 0.00 0.05 0.50 1.33 52.24 33.24 10.81 1.83-STABILII'Y CLASSES-Extrenmely UnsLable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable Wind Direction by WInd Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.05 0.92 1.10 0.92 0.69 0.09 0.00 0.09 0.82 1.92 1.65 0.73 0.00 0.00 0.05 1.10 1.92 2.52 1.05 0.27 0.00 0.00 1.01 1.83 2.43 1.74 0.46 0.00 0.05 0.64 1.74 1.65 1.42 0.73 0.00 0.05 0.92 0.96 1.33 1.83.1.69 0.00 0,05 0.37 0.50 1.37 1.33 1.24 0.00 0.14 0.18 1.10 1.14 0.41 0.55 0.00 0.14 0.55 1.14 2.20 1.24 1.92 0.00 0.14 0.37 1.19 1.79 1.56 3.71 0.00 0.09 0.60 2.06 1.83 2.38 1.65 0.00 0.00 0.05 0.14 0.60 0.82 1.19 1.74 2.38 2.52 1.37 1.97 0.46 0.50 0.00 0.05 0.32 1.33 1.97 2.11 1.14 0.00 0.09 0.46 1.05 1.56 1.88 0.60 0.00 0.27 0.87 0.87 1.24 1.05 0.14 0.00 1.42 10.53 21.66 28.48 22.76 15.16-WIND SPEED CLASSES-CALM< 3.Smph 3.6- 7.5 mph 7.6 .12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 (rph Murray & Tretrel, Inc. 600 FiRt Bank _rive, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 9-18-LaSalle County Generatlng Statlo 375 ft. Wind Speed and Direction July-September.

2010 375Ft-33Ft Delta-T (F)Number of Observations

-2208 Values are Percent Occurrence SPEED----------------------------------

WIND DIRECTION CLASSES---------

STABILITY CLASSES ..........

CLASS N NNE NE ENE E ESE SE SSE S SSW Sw WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU MU C SU A N L SS MMS ES EU MU 1 SU.H 3 SS MS ES EU 4SU-N 7 SS MS FS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.45 0.27 0.05 0.00 0.00 0.00 0.00 0.91 0.27 0.05 0.00 0.00 0.00 0 00 0.59 0.68 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.05 0.00 0.00 0.00 0.00 0.17 0.09 0.00 0.00 0.00 0.00 0.00 1.09 0.54 0.09 0.00 0.00 0.00 0.00 0.32 0.68 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 O.18 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.14 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 EU MU 8 SU-N I SS 2 MS ES EU I M.1 3 SLI-N i SS 8MS ES 0.18 0.14 0.00 0 00 0.00 0.00 0.00 1.36 0.68 0.14 0.00 0.00 0.00 0.00 0.63 0.86 0.36 0.00 0.41 0.36 0.00 0.00 0.00 0.00 0.00 0.50 0.63 0.00 0.00 0.00 0.00 0.00 0.59 0.72 0.00 0.00 0.45 0.14 0.05 0.00 0.00 0.00 0.00 0.72 0.59 0.09 0.00 0.00 0.00 0.00 0.27 0.59 0.27 0.00 0,54 0.32 0.05 0.00 0.00 0.00 0.00 0.41 0.32 0.05 0.00 0.00 0.00 0.00 0.54 0.09 0.68 0.00 0,45 0.54 0.05 0.00 0.00 0.00 0.00 0.41 0.50 0.36 0.00 0.00 0.00 0.00 0.23 0.41 0.63 0.00 0.32 0.23 0.23 0.D0 0.00 0.00 0.00 0.41 0.63 0.32 0.00 0.00 0.00 0,00 0.14 0.36 0.91 0.27 0.50 0.09 0.05 0.00 0.00 0.00 0.00 1.54 0.54 0.41 0.14 0.00 0.00 0.00 1.59 0.77 0.86 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.05 0.14 0.00 0.00 0.00 0.00 0.54 0.23 0.09 0.05 0.00 0.00 0.05 1.54 0.45 0.36 0.23 0.00 0.00 0.18 1.45 1.09 0.91 0.27 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.54 0.32 0.18 0.05 0.00 0.00 0.05 1.86 0.63 0.41 0.23 0.00 0.00 0.09 0.91 0.95 0.95 0.05 0.45 0.18 0.05 0.00 0.00 0.00 0.05 0.59 0.50 0.45 0.00 0.00 0.05 0.14 0.54 0.63 0.59 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.68 0.23 0.09 0.05 0.00 0.00 0.18 0.82 0.23 0.27 0.05 0.00 0.00 0.09 0.45 0.23 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.82 0.45 0.09 0.00 0.00 0.00 0.09 1.49 0.45 0.09 0.00 0.00 0.00 0.18 0.91 0.54 0.32 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.50 0.32 0.09 0.00 0.00 0.00 0.00 1.59 0.77 0.27 0.05 0.00 0.00 0.09 1.10 0.36 0.95 0.27 0.59 0.09 0.05 0.00 0.00 0.00 0.00 1.18 0.18 0.18 0.00 0.00 0.00 0.09 0.95 0.68 0.59 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.04 0.63 0.41 0.05 0.00 0.00 0.00 0.00 8.20 3.99 1.09 0.14 0.00 0.00 0.00 0.41 16.39 7.93 3.53 0.68 0.00 0.00 0.05 0.86 11.28 9.65 8.51 1.72 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.04 0.63 0.41 0.05 Z.13 0.00 0.00 0.00 8.20 3.99 1.09 0.14 13.41 0.00 0.00 0.41 16.39 7.93 3.53 0.68 28.94 0.05 0.86 11.28 9.65 8.51 1.72 32.07 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963.9000 TABLE 9 continued LaSalle County Generating Statlo 375 ft. Wind Speed and Direction-19-July-September.

2010 375Ft-33Ft Delta-T (F)SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

1 CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW N NNW TOTAL EU MU SU N SS MS ES TOTAL EU 0.00 I MU 0.00 9 SU' 0.05 N 0.18 2 SS 0.41 4 MS 0.00 ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.36 0.10 0.00 0.00 0.00 0.00 0.00 0.14 0.05 0.00 0.00 0.00 0.00 0.00 0.14 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.63 1.00 0.54 0.36 0.00 0.00 0.00 0.18 0.23 0.00 0.05 0.00 0.05 0.18 0.77 2.04 1.04 0.00 0.00 0.00 0.00 0.45 1.63 0.32 0.00 0.00 0.00 0.00 0.82 0.82 0.18 0.00 0.00 0.00 0.05 0.45 0.36 0.18 0.00 0.00 0.00 0.00 0.50 0.32 0.05 0.00 0.00 0.05 0.18 0.09 0.27 0.05 0.00 0.00 0.00 0.00 0.36 0.50 0.45 0.00 0.00 0.00 0.00 0.18 0.59 0.05 0.00 0.00 0.00 0.00 0.68 0.95 0.09 0.00 0.00 0.00 0.00 0.18 0.41 0.00 0.00 0.00 0.00 0.00 0.59 0.63 0.27 0.00 0.00 0.00 0.00 0.09 0.09 0.00 0.00 0.00 0.00 0.00 0.41 0.14 0.14 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.05 0.27 5.07 7.74 3.40 0.36 0.00 0.00 0.05 0.23 1.63 3.89 0.72 0.05 0.05 0.27 5.07 7.74 3.40 0.36 16.89 EU GMU T SU N 2 SS 4 MS ES 0.00 0.00 0.00 0.00 0.09 0.09 0.00 0.05 0.23 1.6.3 3.89 0.72 0.05 6.57 TOT 4.21 3.89 4.35 3.53 4.03 3.40 4.17 4.26 10.14 14.22 10.14 6.11 5.80 8.06 8.20 5.48 100.00 0.00 0.14 1.77 43.61 33.83 17.66 2.99 100.00 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW' NW NNW TOTAL 0.00 0.00 0.05 2.13 1.72 0.32 0.00 0.00 0.00 0.00 2.26 1.31 0.32 0.00 0.00 0.00 0.00 2.17 1.68 0.50 0 Oil 0.00 0.00 0 00 1.59 1.90 0.05 0.00 0.00 0.00 0.00 1.54 1.86 0.63 0.00 0.00 0.00 0.00 1.54 0.86 1.00 0.00 0.00 0.00 0.00 1.27 1.68 1.22 0.00 0.00 0.00 0.00 0.95 1.49 1.54 0.27 0.00 0.00 0.05 4.53 2.63 1.90 1.04 0.00 0.05 0.41 4.89 5.48 2.85 0.54 0.00 0.00 0.18 4.57 3.12 1.95 0.32 0.00 0.09 0.36 2.40 1.90 1.18 0.18 0.00 0.00 0.27 2.58 1.77 1.09 0.09 0.00 0.00 0.27 4.08 2.90 0.59 0.23 0.00 0.00 0.09 3.99 2.22 1.59 0.32 0.00 0.00 0.09.3.12 1.31 0.95 0.00 0.00 0.14 1.77 43.61 33.83 17.66 2.99-STABILITY CLASSES-Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable Wind Oirectien by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WN'v NW NNW TO'IAL 0.00 O.Ob 0.77 1 22 1.36 0.63 0.18 0.00 0.14 0.86 1.72 I.IB 0.00 0.00 0.00 0.00 0.32 2.17 1.86 0.00 0.00 0.00 0.06 0.77 1.13 1.31 0.27 0.00 0.00 0.09 0.63 1.40 1.13 0.59 0.18 0.00 0.05 0.91 0.77 1.31 0.36 0.00 0.00 0.27 1.04 1.27 1.27 0.32 0.00 0.00 0.27 0.77 1.16 1.68 0.18 0.00 0.00 0.14 0.63 2.63 3.71 2.58 0.45 0.00 0.32 0.91 2.63 3.89 4.08 2.40 0.00 0.09 1.09 3.17 2.94 1.81 1.04 0.00 0.27 0.68 1.59 2.08 0.86 0.63 0.00 0.09 1.04 1.54 1.00 1.31 0.82 0.00 0.09 1.36 2.13 2.17 1.72 0.59 0.00 0.09 0.91 2.67 2.85 1.49 0.18 0.00 0.14 0.72 1.54 2.31 0.68 0.09 0.00 2.13 13.41.28.94 32.07 16.09 6.57-WIND SPEED CLASSES-CALM< 3.5 mfph 3.6 -7.5 mph 7.6 -12.5 itph 12.5 -18.5 mph 18.6 -24.5 mph> 24.5 mph Muiray & Trectel, 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963.9000 TABLE 10-20-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction October-Deceuber.

2010 375Ft-33Ft Delta-T (F)Number of Observations

-2163 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

EU MU SU N SS MS ES TOTAL CLASS N NNE NE EU MU C SU A N L SS MMS ES EU MU I SU-N 3 SS MS ES EU SU.N 7 SS MS ES EU NJ 8 SU-N I SS KS ES EU 1 MU 3 SU-N 1, SS 8 MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.51 0.55 0.32 0.42 0.14 0.14 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.32 0.46 0.14 0.46 0.14 0.05 0.14 0.09 0.00 0.00 0.00 0.00 0.00 0.00 1.25 0.79 0.32 0.60 0.09 0.23 0.09 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.09 0.00 0.00 0.00 0.00 0.23 0.23 0.05 0.00 0.00 0.00 0.00 0.65 0.83 0.14 0.00 ENE 0.00 0.00 0.00 0.00 0.00 0.00 0.0o 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.14 0.05 0.18 0.00 0.00 0.00 0.00 0.37 0.51 0.09 0.00 0.00 0.00 0.00 0.51 0.51 0.00 0.00 E ESE SE SSE S SSW SW WSW W NW NNW TOTAL 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.14 0.18 0.00 0.18 0.09 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.32 0.32 0.37 0.23 0.09 0.09 0.00 0.09 0.00 0.00 0.00 0.00 0,00 0.00 0.60 0.42 0.79 0.46 0.09 0.28 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.09 0.18 0.09 0.00 0.00 0.00 0.00 0.14 0.09 0.18 0.18 0.00 0.00 0.00 0.05 0.23 0.18 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.18 0.05 0.05 0.00 0.00 0.00 0.05 0.05 0.32 0.09 0.00 0.00 0.00 0.23 0.14 0.28 0.1.4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.05 0.00 0.00 0.00 0.00 0.14 0.23 0.23 0.05 0.00 0.00 0.00 0.60 0.05 0.69 0.60 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.05 0.05 0.05 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.69 0.09 0.28 0.14 0.14 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.51 0.42 0.55 0.42 0.55 0.23 0.65 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.18 0.05 0.09 0.00 0.00 0.00 0.00 0.23 0.51 0.28 0.09 0.00 0.00 0.00 1.02 0.51 0.46 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.00 0.00 0.00 0.00 0.23 0.05 0.05 0.09 0.00 0.00 0.00 0.97 0.37 0.14 0.14 0.00 0.00 0.00 1.06 0.65 0.42 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.14 0.14 0.09 0.00 0.00 0.00 0.00 0.92 0.32 0.51 0.05 0.00 0.00 0.00 1.76 0.97 0.46 0.65 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.09 0.00 0.00 0.00 0.00 0.23 0.09 0.14 0.00 0.00 0.00 0.00 1.34 0.23 0.32 0.18 0.00 0.00 0.00 0.97 0.69 0.60 0.32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.28 0.05 0.05 0.05 0.00 0.00 0.00 0.32 0.51 0.23 0.00 0.00 0.00 0.00 0.60 0.46 0.32 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.28 0.23 0.37 0.00 0.00 0.00 0.00 0.00 2.73 2.13 1.57 0.32 0.00 0.00 0.00 0.00 7.07 4.62 3.01 1.20 0.00 0.00 0.00 0.00 11.60 8.18 5.22 3.47 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.28 0.23 0.37 0.00 0.88 0.00 0.00 2.73 2.13 1.57 0.32 0.00 0.00 7.07 4.62 3.01 1.20 15.90 0.00 0.00 11.60 8.10 5.22 3.47 28.48 Murray & Trettel, Inc. 600 First Bank D~ive, Suite A Palatine, Illinois 60067 (847) 963.9000 TABLE 10 continued LaSalle County Generating Statio 375 ft. Wind Speed and Direction-21-October-December.

2010 375Ft-33Ft Delta-T (F)0 SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

EU MU SU N SS MS ES TOTAL CLASS N NNE HE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU I MU 9 SU-N 2 SS 4MS ES EU G MU T SU N 2 SS 4MS ES 0.00 0.00 0.00 1.25 0,65 0.55 0.05 0.00 0.00 0.00 0.23 0.05 0.09 0.05 0.00 0.00 0.00 0.05 0.42 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.28 0.42 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.28 0.18 0.09 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.00 0.00 0.00 0.00 0.18 0.23 0.14 0.00 0.00 0.00 0.00 0.23 0.18 0.00 0.00 0.00 0.00 0.00 0.23 0.18 0,18 0.00 0.00 0.00 0.00 0.18 0.42 0.14 0.00 0.00 0.00 0.00 0.32 0.51 0.23 0.00 0.00 0.00 0.00 0.05 1.66 0.09 0.00 0.00 0.00 0.00 0.55 0.55 0.60 0.42 0.00 0.00 0.00 0.42 1.62 1.16 0.05 0.00 0.00 0.05 0.18 0.28 0.92 0.37 0.00 0.00 0.00 0.74 1.06 1.53 0.00 0.00 0.00 0.09 0.55 0.51 0.28 0.32 0.00 0.00 0.00 0.51 0.97 0.42 0.00 0.00 0.00 0.00 0.88 0.32 0.55 0.32 0.00 0.00 0.00 1.62 0.23 0.51 0.09 0.00 0.00 0.00 1.20 1.11 1.06 0.42 0.00 0.00 0.00 1.11 1.11 0.32 0.00 0.00 0.00 0.00 1.66 0.74 0.42 0.14 0.00 0.00 0.00 0.65 1.43 0.05 0.00 0.00 0.00 0.00 1.48 0.79 0.37 0.09 0.00 0.00 0.00 0.28 0.51 0.00 0.00 0.00 0.00 0.00 1.85 0.69 0.46 0.05 0.00 0.00 0.00 0.74 0.60 0.00 0.00 0.00 0.00 0.00 0.14 10.96 7.63 5.92 2.17 0.00 0.00 0.00 0.00 6.80 9.85 4.35 0.18 0.00 0.14 10.96 7.63 5.92 2.17 26.81 0.00 0.00 6.80 9.85 4.35 0.18 21.17 TOT 6.38 4.72 2.54 3.14 3.42 3.14 2.87 4.48 8.14 7.44 7.40 8.18 10.82 11.14 8.78 7.40 100.00 0.00 0.00 0.14 39.44 32.64 20.43 7.35 100.00 Wind Direction by Stability N NNE NE ENE I ESE SE SSE S SSW SW WSW W WNW NW NNW ['TAL (1.00 0.00 0.00 3.56 1.48 1.02 0.32 0.00 0.00 1.85 1.90 0.65 0.32 0.00 0.00 0.00 0.88 1.39 0.28 0.(00 0.00 0.00 (.00 1.34 1.5.3 0.28 0.00 0.00 0.00 0.00 1.29 1.53 0.51 0.09 0.00 0.00 0.00 1.34 1.11 0.60 0.09 0.00 0.00 0.00 0.69 1.16 0.79 0.23 0,00 0.00 0.00 0.69 2.54 0.97 0.2B 0.00 0.00 0.00 1.16 2.54 2.73 1.11 0.00 0.00 0.05 1.80 1.90 3.05 0.65 0.00 0.00 0.09 2.40 2.40 1.48 1.02 0.00 0.00 0.00 3.93 1.66 1.90 0.69 0.00 0.00 0.00 4.62 3.28 2.03 0.88 0.00 0.00 0.000 5.1.3 3.61 1.57 0.83 0.00 0.00 0.00 4.35 2.31 1.53 0.60 0.00 0.00 0.00 3.79 2.31 1.06 0.23 0.00 0.00 0.14 39.44 32.64 20.43 7.35-StABIL1I"Y CLASSES-Extremely Unstable Moderately UInstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable Wind Direction by Wind Speed N NNF NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW T{YFAL 0.00 0.00 0.97 0.74 1.76 2.50 0 42 0.00 0.18 1.20 1.06 1.76 0.51 0.00 0.00 0.05 0.32 0.51 1.62 0.05 0.00 0.00 0.09 0.37 0.97 1.02 0.69 0.00 0.00 0,00 0.46 0.79 1.53 0.55 0.09 0.00 0.05 0.23 0.74 1.16 0.55 0.42 0.00 0.05 0.37 0.60 0.51 0.60 0.74 0.00 0.00 0.32 0.51 0.79 1.06 1.80 0.00 0.00 0.18 0.65 1.94 2.13 3.24 0.00 0.05 0.09 0.51 1.66 1.80 3.33 0.00 0.09 0 23 1.16 2.27 1.76 1.90 0.00 0.05 0.32 1.11 2.17 2.08 2.45 0.00 0.09 0.42 1.62 2,36 3.79 2.54 0.00 0.05 0.37 1.80 3.84 2.96 2.13 0.00 0.14 0.46 2.08 2.59 2.73 0.79 0.00 0.00 0.42 1.06 1.53 3.05 1.34 0.00 0.88 6.75 15.90 28.48 26.81 21.17-WIND SPEED CLASSES-CALM-c 3 5 mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18.6

24.5 mph> 24 5 mph Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 11-22-LaSalle County Generating Statio 375 ft. Wind Speed and Direction January-December.

2010 375Ft-33Ft Delta-T (F)Number of Observations

-8591 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ..........

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU MU C SU A N L SS mMS ES EU MU I SU-N 3 SS MS ES EU SU N 7 SS MS F:. '0.00 0.00 0.00 0.00 0.00 O.00 0.00 0.00 0.00 0.00 0.00 0.02 0.01 0.00 0.00 0.00 0.00 0.48 0.21 0.08 0.01 0.00 0.00 0.00 0.95 0.20 0.13 0.12 0.00 0.01 0.03 0.98 0.59 0.10 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.06 0.00 0.00 0.00 0.00 0.65 0.22 0.05 0.03 0.00 0 00 0.00 1.34 0.45 0.09 0.03 0.00 0.00 0.03 1.06 0.64 0.13 0.03 0.00 0.00 0.00 0.00 0.00 O.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.00 0.00 0.26 0.22 0.07 0.00 0.00 0.00 0.00 0.73 0.48 0.07 0.02 0.00 0.01 0.07 1.04 0.72 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.01 0.01 0.00 0.00 0.00 0.00 0.36 0.23 0.06 0.01 0.00 0.00 0.00 0.52 0.56 0.02 0.00 0.00 0.00 0.00 0.83 0.59 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.03 0.00 0.00 0.00 0.00 0.00 0.35 0.15 0.07 0.02 0.00 0.00 0.00 0.66 0.59 0 07 0.00 0 00 0 00 0.00 0.55 0.72 0.14 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.45 0.14 0.05 0.00 0.00 0.00 0.00 0.49 0.27 0.08 0.02 0.00 0.00 0.00 0.56 0.33 0.31 0.00 0.00 0.00 0.00 0.00 0.00.O0 0.00 0.00 0.00 0.00 0.06 0.03 0.00 0.00 0.00 0.00 0.01 0.24 0.22 0.05 0.00 0.00 0.00 0.01 0.43 0.22 0.19 0.05 0.00 0.00 0.01 0.45 0.36 0.36 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.07 0.05 0.01 0.00 0.00 0.00 0.00 0.13 0.14 0.09 0.01 0.00 0.00 0.00 0.48 0.31 0.19 0.02 0.00 0.00 0.00 0.28 0.24 0.41 0.16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.07 O.01 0.02 0.00 0.00 0.00 0.00 0.33 0.14 0 05 0.00 0.00 0.00 0.00 0.71 0.26 0.20 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.08 0.03 0.06 0.00 0.00 0.00 0.00 0.24 0.10 0.05 0.01 0.00 0.00 0.01 0.74 0.22 0.14 0.08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.07 0.02 0.00 0.00 0.00 0.00 0.31 0.17 0.09 0.03 0 00 0.00 0.01 1.16 0.38 0.19 0.08 0.00 0.00 0.00 0.00 0.00 0.o0 0.00 0.00 0.00 0.00 0.09 0.02 0.00 0.01 0.00 0.00 0.00 0.34 0.12 0.05 0.00 0.00 0.00 0.01 0.44 0.38 0.22 0.02 0.00 0.01 0.03 0.90 0.61 0.30 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.03 0.02 0.00 0.00 0.00 0.00 0.43 0.15 0.10 0.03 0.00 0.00 0.105 0.84 0.33 0.21 0.07 0.00 0.00 0.02 0.98 0.55 0.31 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.01 0.00 0.00 0.00 0.00 0.37 0.20 0.06 0.00 0.00 0.00 0.02 1.22 0.37 0.24 0.01 0.00 0.00 0.06 1.79 0.99 0.41 0.26 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.02 0.03 0.00 0.00 0.00 0.00 0.33 0.24 0.07 0.00 0.00 0.00 0.00 1.19 0.52 0.26 0.07 0.00 0.00 0.02 1.22 0.72 0.66 0.30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.06 0.03 0.01 0.00 0.00 0.00 0.42 0.14 0.05 0.01 0.00 0.00 0.00 0.73 0.20 0.15 0.03 0.00 0.00 0.02 0.90 0.68 0.38 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.68 0.47 0.31 0.02 0,00 0.00 0.00 0.01 5.69 2.81 1.02 0.19 0.00 0.00 0.00 0.12 12.64 5.75 2.44 0.70 0.00 0.00 0.03 0.41 13.70 9.28 5.23 1.97 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.68 0.47 0.31 0.02 1.49 0.00 0.00 0.01 5.69 2-81 1.02 0.19 9 72 EU MU 8 SU.N I SS 2 MS ES EU I MU 3 73-N 1 SS 8 MS ES 0.00 0.12 12.64 5.75 2.44 0.10 21.65 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.03 0.83 0.77 0.58 0.41 0.54 0.59 0.61 0.44 0.49 0.36 0.13 0.19 0.03 0.41 13.70 9.28 5.23 1.9!30.61 Murray & Trette4 Inc. 600 First Bank Drue, Sire A Palatine, Illinois 60067 (847) 963.9000 TABLE 11 continued LaSalle County Generating Statio 375 ft. Wind Speed and Direction-23-January-Decenber, 2010 375Ft-33Ft Delta-T (F)SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NU NNW TOTAL EU MU SU N SS MS ES TOTAL EU 1 MU 9 SU-N 2 SS 4MS ES EU G MU T SU N 2 SS 4MS ES 0.00 0.00 0.01 0.55 0.35 0.22 0.09 0,00 0.00 0.00 0.12 0.05 0.07 0.01 0.00 0.00 0.02 0.81 0.19 0.03 0.00 0.00 0.00 0.00 0.14 0.03 0.00 0.00 0.00 0.02 0.06 0.61 0.06 0.01 0.00 0.00 0.01 0.03 0.19 0.03 0.00 0.00 0.00 0.00 0.00 0.66 0.27 0.00 0.00 0.00 0.00 0.00 0.15 0.00 0.00 0.00 0.00 0.01 0.00 0.42 0.40 0.14 0.00 0.02 0.01 0.01 0.12 D.17 0.03 0.00 0.00 0.00 0.00 0.38 0.26 0.23 0.01 0.00 0.00 0.00 0.35 0.20 0.01 0.00 0.00 0.00 0.00 0.31 0.24 0.29 0.01 0.00 0.00 0.00 0.24 0.40 0.16 0.00 0.00 0.00 0.00 0.09 0.19 0.13 0.05 0.00 0.00 0.00 0,03 0.57 0.13 0.02 0.00 0.00 0.05 0.42 0.51 0.42 0.31 0.01 0.05 0.05 0.27 0.86 0.29 0.03 0.00 0.02 0.13 0.38 0.74 0.59 0.14 0.00 0.03 0.09 0.62 1.27 0.57 0.08 0.00 0.00 0.05 0.62 0.77 0.15 0.08 0.00 0.01 0.07 0.40 0.62 0.42 0.05 0.00 0.00 0.02 0.66 0.30 0.30 0.10 0.00 0.01 0.08 0.50 0.15 0.17 0.02 0.00 0.00 0.06 0.87 0.77 0.45 0.14 0.00 0.00 0.00 0.56 0.59 0.10 0.00 0.00 0.00 0.00 1.20 0.79 0.19 0.03 0.00 0.00 0.00 0.34 0.78 0.01 0.00 0.00 0.00 0.00 1.43 0.91 0.35 0.05 0.00 0.00 0.00 0.37 0.24 0.00 0.00 0.00 0.00 0.00 0.88 0.50 0.27 0.02 0.00 0.00 0.00 0.38 0.23 0.00 0.01 0.00 0.00 0.06 0.40 ,10.31 7.24 3.78 1.05 0.03 0.03 0.13 0.34 4.77 6.20 1.98 0.23 0.06 0.40 10.31 7.24 3.78 1.05 22.84 0.13 0.34 4.77 6.20 1.98 0.23 13.69 TOT 5.45 6.11 4.89 4.33 4.75 4.19 4.38 3.81 7.32 8.39 7.69 6.03 7.82 9.41 9.07 6.37 100.00 0.03 0.22 1.28 47.79 31.74 14.77 4.16 100.00 Wind Direction by Stability N NNE NF ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.01 0.05 3.07 1.42 0.62 0.28 0.00 0.00 0.06 4.05 1.54 0.36 0.10 0.00 0.05 0.16 2.82 1.52 0.31 0.02 0.00 0.00 0.00 2.55 1.66 0.10 0.01 0.02 0.02 0.01 2.13 2.07 0.45 0.03 0.00 0.00 0.00 2.28 1.19 0.69 0.03 0.00 0.00 0.03 1.75 1.48 1.05 0.07 0.00 0.00 0.001 1.08 1.50 0.95 0.27 0.01 0.05 0.10 2.62 2. 19 1.58 0.77 0.00 0.06 0.29 2.84 2.91 1.85 0.44 0.00 0.01 0.16 3.12 2.61 1.36 0.43 0.00 0.02 0.15 2.93 1.58 1.05 0.29 0.00 0.00 0.13 3.71 2.42 1.21 0.35 0.00 0.00 0.08 4.92 3.18 0.92 0.30 0.00 0.0 0.02 4.59 2.67 1.37 0.42 0.00 0.00 0.02 3.33 1.80 0.88 0.33 0.03 0.22 1.28 47.79 31.74 14.77 4.16-STABILITY CLASSES-Extremely Unstable Moderately Unstable SlighLly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0,03 0.78 1.40 1.77 1.22 0.00 0.10 0.95 1.92 1.90 1.06 0.00 0.02 0.55 1.30 1.99 0,76 0.00 0.05 0.66 1.11 1.43 0.93 0.00 0.07 0.59 1.33 1.42 0.97 0.00 0.05 0.64 0.86 1.20 0.88 0.00 0.09 0.52 0 90 1.20 0.86 0.00 0.13 0.37 1.00 1.09 0.45 0.00 0.1.2 0.51 1.22 2.20 1.71 0.00 0.17 0.41 1.20 1.93 2.01 0.00 0.15 0.62 1.02 1.89 1.66 0.00 0.13 0.50 1.08 1.98 1.40 0.00 0.09 0.72 1.49 1.97 2.29 0.00 0.06 0.63 1.87 3.50 2.21 0.00 0.10 0.64 2.04 2.93 2.74 0.00 0.12 0.62 1.12 2.21 1.68 0.00 1.49 9,72 21.65 30.61 22.84-WIND SPEED CLASSES-CALM* 3.5 mph 3.6- 7.5 h 7.6 -12.5 mph 12.6 -18.5 mrph 18.6 -24.5 mph> 24.5 mph 0.24 0.17 0.27 0.15 0.37 0.56 0.80 0.76 1.56 2.67 1.56 0.94 1.26 1.13 0.62 0.63 13.69 Murray & 7Tettel, Inc. 600 First Bank Drive, Suite A Paatine, ll1irwis 60067 (847) 963.9000 5.5 Precipitation Monthly totals and the maximum 24-hour and maximum 1-hour precipitation amounts are summarized below. The month with the most measured precipitation was June*. The month with the least measured precipitation was February*.

The maximum 24-hour total was 1.73" (June*) and the maximum 1-hour total was 1.30" (June*).Table 12 Precipitation Totals (inches) -2010 LaSalle Site Maximum Maximum Month Total 24-hour 1-hour January 0.40* 0.29* 0.08*February 0.05* 0.03* 0.02*March 1.70* 0.57* 0.21*April 2.06* 0.46* 0.34*May 4.08 1.13 0.39 June 7.85* 1.73' 1.30*July 1.95* 1.05" 0.59*August 1.31 0.46 0.24 September 2.84 1.04 0.41 October 1.33' 0.55* 0.31*November 1.37 0.57 0.23 December 1.45* 0.65* 0.15*TOTAL: 26.39** some data are missing -actual precipitation may be under-reported Murray & Trettel, Inc. 6o0 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 5.6 Doses Resulting from Airborne Releases The following are the maximum annual calculated cumulative offsite doses resulting from LaSalle County Station airborne releases.LaSalle County Generating Station: Dose gamma air 41)beta air (2)whole body (3)skin (4)organ (5 (infant-thyroid)

Maximum Value 3.660 x 10-3 mrad 1.340 x 10.3 mrad 1.169 x 10-2 mrem 3.910 x 10.3 mrem 6.567 x 10" mrem Sector Affected East-Southeast East-Southeast East-Southeast East-Southeast East-Southeast I Compliance Status 10 CFR 50 Appendix I Yearly Objective% of Appendix I gamma air beta air whole body skin organ 10.0 20.0 5.0 15.0 15.0 mrad mrad mrem mrem m rem 0.04 0.01 0.23 0.03 4.38 (1)(2)(4)(5)Gamma Air Dose -GASPAR II, NUREG-0597 Beta Air Dose -GASPAR II, NUREG-0597 Whole Body Dose -GASPAR II, NUREG-0597 Skin Dose -GASPAR II, NUREG-0597 Inhalation and Food Pathways Dose -GASPAR II, NUREG-0597 Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9000 APPENDIX Murray & Trettel, Inc. 6o0 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 Exelon Contract Number 80633 D4 7109 R-27 Page 1 of 6 LaSalle Meteorological Calibration Date: Ll (d POWER SUPPLIES i-12.OOOV

+/- 0.120V -12.OOOV +/-0.120V A: + iZ -0 5--V A: -i 2 0 -V B________-L4V B3:- 1 r-" V Signal conditioners and Digital Recorder:t'.nnditinn~r VnI~nmw Ai it AF AL AL EQUIV PRCP LO

c;) V PRCP HI 5')00_ V WS ZERO., D2'6 V WS SPAN2.50 V WD ZERO, O 0 oV WD SPAN 3 -i V ERO ..V TSPAN ______V 10 ft."- V ,00 ,,* " V /40 .35 ft.-V O,50 mphmph_ V 0* -vI1.( 0 Diqital recorder AF AL 0. HO."- ,.d .-- ,, mph mph 5"D. 0 mph mph Signal Cond.0.000V +/- 0.050V 5.000V +/- 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V 0.000V +/- 0.100V 3.333V 1 0.100V 0.000V +/- 0.050V 5.OOOV +/- 0.050V Soecifications

'3(c. e) .-0 0 WS ZERO : it V WS WDZERO 00Z.- V WD SPAN AT, ZERO. 0o0 V AT, SPAN.i5,-" V AT 2 ZERO C!. aVV AT 2 SPAN 1, _ V WS ZERO. Uý-S V WS SPANIC.L!

V WD ZERO 100O V WO SPAN3 .3' V V AT, ZERO, 06 i V AT, SPAN L1q06V 2 ZERO OC, V AT 2 SPAN .7---f- V 200 f t .___V 6--75L mph-..'V " 0 mph-v,) f 0q__V-V 375 ft.-- V 5c.,-- mph-V __.__mph" _V 0-v 6-7-_.- v ,9L-- V"- V.mph' mphI mph_-- mph c:) ° -o-9,9o -9 S5 .mph mph , (mph -mph 3()0 -0 3(~C o-0.025V + 0.025V 2.500V +/- 0.025V 0.OOOV +/- 0.100V 3.333V +/- 0.100V 0.OOOV +/- 0.050V 5.OOOV +/- 0.050V 0.000V + 0.050V 5.000V +/- 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V o.000V +/- 0.100V 3.333V +/- 0.100V O.O00V +/-0.050V 5.000V + O.050V 0.OOOV + 0.050V 5.OOOV + 0,050V A--3-NL Recorder AL EQUIV +/- 0.01" AL EQUIV +/- 0.01" AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 1 0 AL EQUIV + 1'AL EQUIV + .1°F AL EQUIV +.1°F AL EQUIV + ,1mph AL EQUIV +- .1mph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV + .1°F AL EQUIV + .1 0 F AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV + V1 AL EQUIV + .1lF AL EQUIV +.1OF Murray & Trettel, Inc. -6oo First Bank Drive, Suite A .Palatine, Illinois.

600672 (847) 963-9000 Exelon Contract Number 80633 LaSalle Meteorological Calibration D5 7/09 R-27 Page 2 of 6 Date: )-4Lf-)TOWER MEASUREMENTS Z] r] Ice Bath Temperatures 33 ft. Amb. 200 ft. 1 A AF AL AF AL 3L,0OOoF O- F -1,30 oF -oF.S" OF O- F -_ ___F -F , 05°F -OF O.OO OF °F;0.5oF +0.18OF Measured Recorded Difference Specification 375 ft. AT 1 AF AL-Z, ZS"F "-__°F.' oF -18FF O F+/-0.08 OF O 33 ft.AF AL WSstaII )K mph0-5 _mph Forw. WD 3 L Revr. WD ?(Tracking/wear 0j Y Winds 200 ft.AF AL b)L, mph -mph 3 0P. 0 375 ft.AF AL._ mph ____mph 0 -o OK-.Specification 0.5mph +/- 0.45mph 00/3600 t 50 1800/5400

+/- 50 Comments: Murray & Trettel, Inc. , 6oo First Bank Drive, SuiteA .Palatine, Illinois.

60067 2 (847) 963-9000 LaSalle Meteorological Calibration D6 7/09 R-27 Page 3 of 6 Date: 0 Dates of Last Wind Sensor Bearing Replacements:

(6 mos.) Wind Speed: (12 mos.) Wind Direction:

33 ft.2-"1~200 ft.I -zz -10 q_14_0?375 ft.z --Z9 ?*061 10-7-01)4 33 ft. 200 ft. 375 ft.Aspirators:

C) -- _ K 0 _ __Operation of De-ice Heat Lamp System (Aug-Mar):

Operation of Rain Gauge: OJ-Debris screen: In 00 Installed Removed Tower Lightinq Good Fair Poor Tower Condition Good Fair Poor Beacon Side lights Wiring Flasher oC1 : 11 1o Paint Guy wire tension Shelter condition[I F1 Note: AF =AL =As Found As Left no change (AF=AL)Calibration Instruments:

Psychrometer

-S/N -/1 'i+/-l O Lde 10 Digital multimeter-SIN

-T34/.O 63 j)3e -10 Digital multimeter

-SIN --o Techn FS = Full Scale licians: jv 4 N,, ents: i" "',./"/,-3

&-.le; v Comm h Z'i) ,67L4$~-£ J~MD j-)C.4 Lqr'1 P~~e Jc ~cV;A~- 1") OK Y6ke ' L-OLA3 Lo' ,YHLJ ý 007 37, 1.'~~~ II ,4A A~7L~Signature w Murray & Trettel, Inc.

6oo First Bank Drive, Suite A .Palatine, Illinois.

60067 3 (847) 963-9ooo

..... OD7 7/09 R-2T Page 4 of 6 Date: System Response Check Site: LaSalle System: Microtel Low Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 20.0 +/-0.4 20.0 0.4 20.0 +/-0.4 108 +/-2 108 +/-2 108 +/-2 6.80+/-0.7 -6.00 +/-0.18 -6.00 +/-0.18 Response As Found Response IL),C , ---- " As Left _.Response Am2 3-1-1o Murray & Trettel, Inc. -6oo First Bank Drive, Suite A -Palatine, Illinois .60067 9 (847) 963-9000 D8 7/09 R-27 Page 5 of 6 System Response Check Date: a- -j -Site: LaSalle System: Process Computer Mid Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 324 +/-2 324 +/-2 60.0 +/-0.4 60.0 +/-0.4 8.00 +/-0.18 60.0 +/-0.4 324 +/-2 64.40 +/-0.7 8.00+/-0.18 0.60 +/-0.01 Response _As Found.Response 3,AVJ, 3-- 5qi, = , LO ') 3Ui t , ', .,)AsLeft ....-.Response

.....Full Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 432 +/-2 432 +/-2 80.0 +/-0.4 80.0+/-0.4 14.00+/-0.18 80.0 +/-0.4 432 +/-2 93.20+/-0.7 14.00+/-0.18 0.80 +/-0.01 Response As Found Response L323Z.-L- -'11-5 Lj, C.c.i jq 1 9,9 q'., As Left -* /" -Response I I_ , I- _______,__

Murray & Trettel, Inc.

60o First Bank Drive, Suite A .Palatine, Illinois.

60067 W (847) 963-9000 0 0 D9 7/09 R-27 Page 6 of 6 System Response Check Date: 2""L / .'Site: LaSalle System: Control Room Indicators Low Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 20.0 +/-1.0 20.0 +/-1.0 108 +/-5.4 108 +/-5.4 -4.00 +/-0.3 Response ...As Found Response -.L- I 23 -- ) A As Left ... ..Response Mid Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 60.0 +/-11.0 60.0 +/-1.0 324 15.4 324 +/-5.4 8.00 +/-0.3 Response _______________

As Found Response t ;-. "_ _ _ _ _ _ .52_ __- ____ _ _ _ _. _ _As Left Response Full Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 80.0 +/-1.0 80.0 +1.0 432 -5.4 432 +/-5.4 14.00 +/-0.3 Response .04.As Found Response H0,. "L-.As Left Response A--Y- 3-wO -Murray & Trettel, Inc.

6oo First Bank Drive, Suite A .Palatine, llinois -6o067 2 (847) 963-9ooo LaSalle Meteorological Calibration Exelon Contract Number 80633 D4 7/09 R-27 Page 1 of 6 Date: (o-H-It POWER SUPPLIES+12.OOOV +/- 0.120V -1 2.000V +/- 0. 120V A:+ i Z.0QZ7 V A: -12 c5-335 V B:+/12.0SZ, V B:- 12 02- V Signal conditioners and Digital Recorder: Signal Conditioner Voltage Out Digital recorder Specifications AF AL AL EQUIV AF AL PRCP LO ,0oo0 V PRCP HI ,006 V WS ZERO 6- 0 2 3 V WS SPAN__ Vf WDZERO,00Z7 V'AJD SPAN 3 3 3 3_ V.ZERO 3.-000 V TSPAN E-.000 V 10 ft." V b.o ,,-V ,o0 " 35 ft.-- V -.mph___V 5". mph-V .ZIG__°-- V 31.0-V--vz- o00 O0 -~mph mph.__O mph mph O ° -o-jP36 o -o WSZERO ,)Z q V WSSPAN2,LPq3 V WDZERO, 0 0 1 V WD SPAN 3 3 3 3 V AT, ZERO- 00 V AT, SPAN -6 000 V ATZERO, 100 V AT 2 SPAN.i, DO I V WSZERO,0 7- V WS SPAN 2. VY3 V WD ZERO, 000 V WD SPAN" 5-ý'3 I V AT, ZERO'.O007 V'T, SPAN v aT 2 ZERO b60 V AT 2 SPANI, (O V 200 ft.V 6_mph ,O V 9-.0 _mph-vS9.7____V -Vl0,0O_ °_ V-- V 375 ft.-v ._2_,_oo V 5-,b mph'- V C)-o ,000 V ..10,bo o S, 6a0 v) V10-06 o-" V______V<0, 5"omph --mphD .mph -- mph* S__mph_- mph , mph -mph 0 -0",o. mph -mpho -0 Signal Cond.O.OOOV +/- 0.050V 5.OOOV +/- 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V O.O00V +/- 0.100V 3.333V +/- 0.100V 0.OOOV +/- 0.050V 5.OOOV +/- 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V 0.000V +/- 0.100V 3.333V +/- 0.100V 0.O00V +/- 0.050V 5.OOOV +/- 0.050V 0.OOOV +/- 0.050V 5.OOOV +/- 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V 0.000V +/- 0.100V 3.333V +/- 0.100V O.OOOV +/- 0.050V 5.000V +/- 0.050V 0.000V +/- 0.050V 5.000V +/- 0.050V Recorder AL EQUIV +/- 0.01" AL EQUIV +/- 0.01" AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV + 1I AL EQUIV + .1 0 F AL EQUIV + .1 0 F AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV +.1 0 F AL EQUIV +.1 0 F AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV + .1 0 F AL EQUIV + .1 0 F__ _ 7-KeC' -e/q //0 Murray & Trette[, Inc. 600 Firs Bankl Drive, Suite A. Palatine, Illinois 60067 2 (847) 963.9000 Exelon Contract Number 80633 LaSalle Meteorological Calibration 05 7/09 R-27 Page 2 of 6 Date: J.L-(TOWER MEASUREMENTS Ambient [I Ice Bath Temperatures 33 ft. Amb. 200 ft. AT 375 ft. diTj AF AL AF AL AF AL 7.5 OF -OF 1.-15 oF _ F -OF -OF-OF -F _____'F -O F -.-1L°F O- F Q-15 OF O°F Ld,OoA°F -F 00 °'F -F+/-0.5 0 F i0.18°F +/-0.18 F Measured Recorded Difference Specification 33 ft.AF AL WS stall (L5 mph Forw. WD a °-. 05 °Revr. WD °Tracking/wear Winds 200 ft.AF AL (0 1 mph _( mph 3 ° 0 0--375 ft.AF AL 0.5-mph _mph I-O Specification 0.5mph +/- 0.45mph 00/3600 +/- 50 1800/5400

+/- 50 Comments: MTO 191 I nri4x1[ MTOI o5) n54ol'ec-byi~ W 1 1 G O K, 9ALJA 6 MuTfay& Tier~el, Inc.. 600 First Bank Drive, Suite A.- Palatine, Illinois.-

60067 3 (847) 963-9000 LaSalle Meteorological Calibration D6 7/09 R-27 Page 3 of 6 Date: /O Dates of Last Wind Sensor Bearing Replacements:

33 ft. 200 ft. 375 ft.(6 mos.) Wind Speed: G_ ( "4 (- "I" 0 " _ "9q ID (12 mos.) Wind Direction: 7-2 q'O 33 ft. 200 ft. 375 ft.Aspirators:

.\LK 'L)Operation of De-ice Heat Lamp System (Aug-Mar):

e Operation of Rain Gauge: ______Debris screen: /'f% Out Installed Removed Tower Lightingq Good Fair Poor Tower Condition Good Fair Poor Beacon p El0 E Paint l E] 0 Side lights IL 0 0 Guy wire tension [i El 0 Wiring II El ]Flasher I'I El E Shelter condition 13 El El Note: Calibration Instruments:

AF = As Found Psychrometer-S/N -, I Due 6eT"&0 AL = As Left Digital multimeter-S/N -43i ZOzo 01)L:-= no change (AF=AL) Digital mqltimeter

-SIN -/1PP, L Ul I FS = Full Scale Technicians:

Af-oq LoT _ , "C- /,Zl,_,_, Comments:-VýK6 2;/4j/,10 Mu-fa' Trectet, Inc. , 600 FiTst Bank DTive, Suite A- Palatine, Illinois.

60067 2 (847) 963.9000 Exelon Contract Number 80633 D7 7/09 R-27 Page 4 of 6 Date.-" i System Response Check Site: LaSalle System: Microtel Mid Scale 3'W Check 33'WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' ,nT 375' AT Expected 60.0 +/-0.4 60.0 +/-0.4 60.0 +/-0.4 324:+/-2 324+/-t2 324 +/-2 64.40 +/-0.7 2.00 +/-0.18 2.00 +/-0.18 Response As Found Response qq .0g.DO .. -2 ..As Left --" ." -Response I ....Full Scale Check 33' WS 200" WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Expected 80.0 +/-0.4 80.0 +/-0.4 80.0 +/-0.4 432 +/-2 432 +/-2 432 +/-2 93.20 +/-0.7 6.00 +/-0.18 6.00 +/-0.18 Response ....As Found-Response -jq,9. ý, 9__ _ L3'11 '3.)o _ _ __ _ _ _As Left _ -Response~-~o ~/q/io Murray & Tr,,tte Inc. .600 First Bank Drive. Sathe A -Pa~linu Ii[Ui *as 60067 W (847) 963-9000 Exelon Contract Number 80633 D8 7109 R-27 Page 5 of 6 System Response Check Date: & -" )0 Site: LaSalle System: Process Computer Low Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 108:+/-2 108 +/-2 20.0 +/-0.4 20.0+/-0.4 4,00=+0.18 20.0+/-0.4 108 +/-2 6.80 +/-0.7 -4.00+/-0.18 0.20*0.01 Response +/-0.As Found Response 0. ) '.O ,O1.- G.O , -3F ,oA , ,. L.0 o .-" As Left Response _.Mid Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS. 33' WD 33' T 200' AT Precipitation Expected 324 +/-2 324*+2 60.0 +/-0.4 60.0 +0.4 8.00 E+.18 60.0 +/-0.4 324 +/-2 64.40 +/-0.7 8.00+/-0.18 0.60 +/-0.01 Response .0..... ..As Found Response 3ZS* -5 2-S SA. 9 S.C 1 59 3Z-5. 5- (V /. L( -" As Left .--_-.Response Murray & Trettel, Inc. .600 First Bank Drive, Suite A. Par,,ine, Illinois 60067 W' (847) 963-9000 0 0 Exelon Contract Number 80633 0 D9 7/09 R-27 Page 6 of 6 System Response Check Dae:(o- -)6 Site: LaSalle System: Control Room Indicators Low Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 20.0 +/-1.0 20.0 +/-1.0 108 +/-5.4 108 +/-5.4 -4.00 +/-0.3 Response .....As Found Response ZO IO Jz)O -Io0 As Left Response ....Mid Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 60.0 +/-1.0 60.0 +/-1.0 324 +/-5.4 324 +/-5.4 8.00 +/-0.3 Response .. ..As Found Response (cO 3a, As Left Response _Full Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 80.0 +/-1.0 80.0 +/-1.0 432 +/-5.4 432 +/-5.4 14.00 +/-0.3 Response As Found Response 90 ' 0 Lf 3-o 430 L1, 4)As Left Response*~~SA ~/q ,'Murray &r rette, Inc. .600 First Bank Drive, SuiteA -Palatine, Illinois .60067 2 (847) 963.9000 Exelon Contract Number 455465 D4 7110 R-28 Page 1 of 6 LaSalle Meteorological Calibratior Date: /0_-___1 __POWER SUPPLIES+12.OOOV 1 0.120V -12.OOOV + 0.120V A: + /,, & v A:- J1.2-0 -V B:+ 1Z,2 1L( V B:- 12--0 3 V Signal conditioners and Digital Recorder: Signal Conditioner Voltaqe Out AF AL AL EQUIV Digital recorder Specifications PRCP LO 000 V PRCP HI 5T, 000 V WSZERO0 Z-5 V WS SPAN). 1-Q0 V WDZERO, O0- V SPAN 3-3 3 3 , v.ZERO ;006 V TSPAN _ 0____ V WS ZERO OZ6V WS SPAN 2,5" V WD ZERO, CX V WD SPAN 3,333 V AT, ZERO 0o6L) V AT 1 SPAN5.CO I V AT 2 ZERO.. 00O V AT 2 O 0 0 V WS ZERO. Z-'3 V WSSPAN V WDZERO ,000 V 1,V4 WD SPAN +/-*ATI ZERO, o 1_ V T, SPAN50O0o6 V 2 ZERO-, bD I V AT 2 SPAN L-00. V 10 ft.-- V 0.0o ,, 35 ft,-VO. 2,,500 V 5Z..0 mph-V 6 o-- V Jzz. o0" V ,boo 200 f t.V _ _"mph 2, v D", mph") V 0 m-- V L,) o C V- -.00 0V-JO.oO="-- V 5--.00D V 375 ft.-V 0, _mph____ V !OO mph-V 0 _ _3 -33S3 v _____-V q, q 5.go 0 V ____ ,__f,-10.00___Vc'0 V AF AL 0. ,, -- , 1.0O0 ,, -,,-.-> mph mph z) Mph_ mph 0 o o-0&-', -.mph -mph.7). 0 mph_- mph o-_'-ID.O o -o O ""mph -- mph 0 0 mph mph (7 -0 Signal Cond.0.OOOV

0.050V 5.000V

0.050V 0.025V

0.025V 2.500V +/- 0.025V 0.000V + 0.100V 3.333V +/- 0.1OOV 0.OOOV +/- 0.050V 5.OOOV +/- 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V 0.OOOV +/- 0.100V 3.333V +/- 0.100V 0.000V + 0.050V 5.000V +/- 0.050V 0.000V t 0.050V 5.OO0V +/- 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V 0.000V +/- 0.100V 3.333V +/- 0.1OOV 0.OOOV +/- 0.050V 5.000V

0,050V 0.000V t 0.050V 5.000V -0.050V Recorder AL EQUIV +/- 0.01" AL EQUIV +/- 0.01" AL EQUIV + .lmph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV + 1 0 AL EQUIV + .1 0 F AL EQUIV + .1"F AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 1O AL EQUIV + 1 0 AL EQUIV + .1 0 F AL EQUIV + .1 0 F AL EQUIV + .lmph AL EQUIV + .1mph AL EQUIV + 1j AL EQUIV + 10 AL EQUIV + .1 0 F AL EQUIV + .1 0 F S Murray & TretteL, Inc. .600 First Bank Drive, Suite A. Paltine, Illinois.

60067 2 (847) 963-9000 Exelon Contract Number 455465 LaSalle Meteorological Calibration D5 7/10 R-28 Page 2 of 6 Date: -(1 TOWER MEASUREMENTS , Ambient [] Ice Bath Measured Recorded Difference Specification 33 ft. Amb.AF AL i2s,5F OF 6 ._°F "__°F 0,\5 IF °F+0.50F Temperatures 200 ft. A T 1., AF AL* I. °F -' " F-1,5 OF _____IF 0,0 OF -F+/-0.18°F 375 ft. A T, AF AL-IJ F -" -F" I F I Fl F ____ F+/-0.180F WS stall Forw. WD Revr. WD 33 ft.AF AL_.___ mph 0' _'I-i_ -s 0-/ o ._mph Winds 200 ft.AF AL 0,-] mph 0Q-]Jmph K 121.2 oK 375 ft.AF AL 0,&mph ..)L. mph 35 _ 0 0_19 L- 13i Specification 0.5mph +/- 0.45mph 00/3600 t 50 180015400

+/- 50 0 Tracking/wear-QK-OK.Comments:

f20 w P,'ryf R/ j ATDogSl' himwg6t vz~irt3o Murray &Trettekinc.

-600 Fiiic Bank Drive, SuiteA -PaLatine, 111inois -60067 2 (847) 963-9000 1g11 J1A-.LLA.L1

%..UJAL.Lou.L JULDVL 2juw0.L D6 7/10 R-28 Page 3 of 6 LaSalle Meteorological Calibration Date: -I 10 Dates of Last Wind Sensor Bearing Replacements:

33 ft. 200 ft.(6rmos.) Wind Speed: I1-[t. 10 -10. t- 0 (12 mos.) Wind Direction:

6. q. I ) I 0 *-10 375 ft,/v / 3 to -/- ID 33 ft. 200 ft. 375 ft.Aspirators:

0t4 0- OK Operation of De-ice Heat Lamp System (Aug-Mar):

D!5 Operation of Rain Gauge: 6 Tips Poured ,65 Tips Recorded ,oS UPS CHECK: 01-Debris screen: (fn Out Installed Removed Tower Liqhtincq Good Fair Poor Tower Condition Good Fair Poor Beacon E 11 Ml Paint l 3 0-Side lights El -' I Wiring El -r Flasher -El -' Shelter condition 0 0 El Note: Calibration Instruments:

Next Cal Due AF = As Found Psychrometer

-SIN- V / W.1)e D13 __iO AL = As Left Digital multimeter

-SIN -0o0,3 gu .cx-ezi a-= no change (AF=AL) Digital multimeter

-SIN -FS = Full Scale Technicians:

VlVto u , , it I Ae Comments: Mura & Trettel, Inc.

600 irst Bank Drive, Suite A. Palatine, Illinois

60067 (847) 963.9000 w V Exelon Contract Number 45546G D7 7/10 R-2E System Response Check Page 4 of.6 Date: __________

Site: LaSalle System: Microtel Murray & Trettel, Inc. , 600 Fi 1 1 Bank Drive, Suite A Palatne. Illinois .60067 2 (847) 963-9000 Exelon Contract Number 455461 D 7/1 R-2 System Response Check Page 5 of Date: (01.16 Site: LaSalle System: Process Computer Low Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 108 +/-2 108 +/-2 20.0 +0.4 20.0 +/-0.4 -4.00+/-0.18 20.0+/-0.4 108 +/-2 6.80 +/-0.7 -4.00+/--0.18 0.20 +/-0.01 Response .......__ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ __ _ _ _ _ __ _ _ _ _ _As Found Response 161.q 10.0 ,.O. 0 ).O,O -.qq m, st-eo tO -1 *ob i6.Asete- ..- -__ -Lef t Response Mid Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WO 200" WD 375' WS 200' WS 375'&AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 324 +/-2 324 +/-2 60.0 +/-0.4 60.0 +/-0.4 8.00 +/-0.18 60.0 +/-0.4 324:+/-2 64.40 +/-0.7 8.00+/-0.18 0.60 +/-0.01 Response As Found Response 325.0 0 20 .O_ 5.61- &.0 "7,v S le 32 ,J INO. 1A1 O,5" As Left ... -. .-Response Murrnay & Trettel, Inc. -600 First Bank Drii. Suite A .Palatine, Illinois.

60067 W (847) 963.9000 0 4 V Exelon Contract Number 4554610 ,D 7/1 R-2 Page 6 of System Response Check Site: LaSalle Date: 10- lC)System: Control Room Indicators Mid Scale Check 200' WS 375' WS 200' WD 375' WD 375' A'T Expected 60.0 +/-1.0 60.0 +/-1.0 324 +/-5.4 324 +/-5.4 8.00 +/-0.3 Response As Found Response to 0 3:S Z3 5.As Left .....-Response WL (Pkg-wL MAurray & Tratel, Inc. -600 Fiint Ba A Drive, Suite A -Maraine, Illinois -6006? 7 9 84 7) 963-9000 RAI # MA-01 ATTACHMENT 2

Annual Report on the Meteorological Monitoring Program at the LaSalle County Nuclear Power Station 2011 prepared for Exelon Nuclear Warrenville, IL 60555 by Murray and Trettel, Incorporated 600 First Bank Drive, Suite A Palatine, IL 60067 (847) 963-9000 e-mail: mt(Mweathercommand.com Fo xlnUse Oni ReiwdBy---

Murray & Trettel, Inc.600 First Bank Drive, Suite A Palatine, Minois 6o067 (847)963-9ooo i Table of Contents Sectign Description Paae List of Tables ......................................................................................

ii 1 Introduction

.......................................................................................

1 2 Summ ary .............................................................................................

2 3 Data Acquisition

................................................................................

3 4 Data Analysis .....................................................................................

5 5 Results ............................................................................................

10 Site Calibration logs ...................................................................

Appendix Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Ilinois 6o067 (847) 963-9ooo List of Tables Number Description Pae 1 Instrument Locations

.........................................................................

4 2 Data Loggers ....................................................................................

4 3 Wind Direction Classes ...................................................................

7 4 Wind Speed Classes .........................................................................

7 5 Atmospheric Stability Classes ...............................................................

8 6 Data Recovery Summary .................................................................

11 7 Wind Rose, January-March 2011 ....................................................

14 8 Wind Rose, April-June 2011 ...........................................................

16 9 Wind Rose, July-September 2011 .......................

18 10 Wind Rose, October-December 2011 ...........................

20 11 Wind Rose, January-December 2011 ............................................

22 12 Precipitation Totals .........................................................................

24 13 Maximum Doses Resulting From Airborne Releases .....................

25 Murray & Trettel, Inc. 6o0 First Bank Drive, Su'teA Palatine, Illinois 60067 (847) 963-9000 1. Introduction 0 The purpose of the meteorological program being conducted at the LaSalle County Station site is to provide information sufficient to assess the local weather conditions and to determine the degree of atmospheric dispersion of airborne radioactive effluent from the station.The meteorological tower is 400 ft. high and is instrumented at three levels. Wind speed and direction are measured at 33 ft., 200 ft., and 375 ft. Ambient temperature is measured at 33 ft. Differential temperatures, referenced to 33 ft., are measured at 200 ft.and 375 ft. Precipitation is measured at approximately 10 ft.Joint frequency stability wind rose tables of wind direction, wind speed, and stability are routinely tabulated from hourly measurements.

The quarterly and annual tables are included in this report.Descriptions of the instruments and digital recorder are given in Section 3 (Data 0 Acquisition) of this report. Data reduction and processing are described in Section 4 (Data Analysis).

The results given in Section 5 of this report include modeled maximum whole body doses, skin doses, organ doses based upon airborne releases, and site meteorology.

Murray & Trettel, Inc. 6oo First Bank Drive, Siute A Paltne, Illinois 60067 (847)963-gooo 2. Summary The LaSalle Station meteorological monitoring program produced 78,690 hours0.00799 days 0.192 hours 0.00114 weeks 2.62545e-4 months of valid data out of a possible 78,840 parameter hours during 2011 (365 days x 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months s/day x 9 measured priority parameters), which represents an overall data recovery rate of 99.8%. Priority parameters are all parameters except precipitation.

The stability wind rose tables included in this report have been generated using the 375 ft. wind data with the 375-33 ft. differential temperature data.The maximum annual calculated cumulative doses resulting from airborne releases were as follows.LaSalle County Generating Station: gamma air dose beta air dose whole body dose skin dose organ (infant thyroid)4.160 x 10"3 mrad 1.380 x 103 mrad 1.816 x 10-2 mrem 4.240 x 103 mrem 7.473 x 10"1 mrem Murray& Trettel, Inc. 6oo rst Bank Drive, SuiteA PalatineIlMnois 60067 (847))963-90oo 3. Data Acauisition Wind speed and direction are measured with Climatronics F460 wind sensors. The wind speed sensors have a starting speed of 0.5 mph (0.22 mps), a range of 0 to 100 mph (0 to 44.7 mps), and a system accuracy of +/-1.0 mph at 100 mph (+/-0.45 mps at 44.7 mps). The wind direction sensors have a threshold speed of 0.5 mph (0.22 mps), a range of 0 to 5400, and a system accuracy of +/-50.Ambient and differential temperature are measured with the Climatronics 100093 system.Ambient temperature is measured within the range of -22 to 122 0 F (-30 to 50 0 C) with an accuracy of +/-O.50F (+/-0.3 0 C). Differential temperature is measured within the range of-10 to 10°F (-5.6 to 5.6 0 C) with an accuracy of +/-0.18 0 F (+/--0.10C).

Precipitation is measured with a Climatronics 100097 tipping bucket rain gauge and is measured in increments of one one-hundredth of an inch with a system accuracy of +/-1%for rain rates of 1-3"ihr and +/-3% for rain rates of 3-6"/hr.Instrument types and locations are summarized in Table 1.The meteorological data are collected and stored by a Microtel 4.0 data acquisition system. The Microtel measures the analog voltages of the instruments and records the digital equivalent within the range of 0 to +5 volts. The Microtel has the capability of storing 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months of minute data and one week of hourly data. Data are obtained from the Microtel by a direct dial telephone hookup to an in-house computer system. Data are sampled every second.As a backup to the Microtel, data are also recorded with a Johnson Yokogawa Corp. digital recorder (JYC DA100 data acquisition unit and Contec IPC-PT/M300(PC)WOU PC). Data are sampled every 10 seconds.Data loggers are summarized in Table 2.Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, filiniq 6o067 (847)963-9o00 Table 1 Instrument Locations Measurement Wind Speed Wind Direction Differential Temperature Wind Speed Wind Direction Differential Temperature Wind Speed Wind Direction Ambient Temperature Sensor Type Climatronics 100075 F460 Climatronics 100076 F460 Climatronics 100093 Climatronics 100075 F460 Climatronics 100076 F460 Climatronics 100093 Climatronics 100075 F460 Climatronics 100076 F460 Climatronics 100093 Climatronics 100097-1 Tipping Bucket Rain Gage Location Tower Tower Tower Tower Tower Tower Tower Tower Tower Elevation 375 ft.375 ft.375 ft.200 ft.200 ft.200 ft.33 ft.33 ft.33 ft.Precipitation Meteorological shelter roof loft.Table 2 Sampling Measurement Locigier Tvye Frequency Winds, Temperatures, Microtel 4.0 data acquisition system 1 sec.and Precipitation Winds, Temperatures, Johnson Yokogawa Corp. Digital Recorder 10 sec.and Precipitation (JYC DAIOO and Contec IPC-PT/M300(PC)WOU) digital recorder Murray & Trettel, Inc.6oo First Bank Drive, SuiteA Palatine, Illinois 60067 (847) 930-gooo 4. Data Analysis The LaSalle Microtel is routinely interrogated to obtain hourly average data. The data are then stored in the meteorological data base and listings of the data are generated.

The data listings are examined by qualified personnel and any apparent problems are brought to the attention of the Project Manager or Meteorological Technician and the Instrument Maintenance staff.Hourly values of wind speed, wind direction, ambient temperature, differential temperature, and precipitation are obtained through measurements taken at the site.The standard deviation of wind direction (sigma) is derived. The wind direction variation is described in terms of the standard deviation of the direction about the mean direction.

The Microtel computes an hourly value of wind sigma by taking the Root-Mean-Square (RMS) of the four quarter-hour wind sigma values. The Microtel quarter-hour wind sigma values are calculated directly from the one second wind direction samples during the 15 minute period.The data base files are edited approximately once a week. Missing Microtel values are replaced with digital recorder values, when available.

Invalid data are deleted from the data base.Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9000 When an hourly value is missing or invalid, the numeral 999 is entered into the computer data file in the appropriate location.

When the wind direction changes substantially relative to its short term fluctuations, the numeral 888 can be entered into the wind sigma location to indicate shifting winds. When the wind blows with velocities near the sensing threshold of the instrument, the numeral 777 can be entered into the wind direction, wind speed, and wind sigma locations to indicate light and variable winds.A professional meteorologist reviews the data, calibration findings, equipment maintenance reports, and other information and determines which data are valid. Only the valid data are retained in the data base.As a quality control measure, a monthly comparison is made of Microtel and digital recorder data. An investigation is made into the reasons for any significant differences between the sets of values.Joint frequency stability wind rose tables of hourly data measured at the site are generated.

These tables indicate the prevailing wind direction, wind speed, and stability classes measured during the period of observation as well as the joint frequencies of occurrence of the wind direction, wind speed, and stability classes. The values are also used as input to the atmospheric transport and diffusion models. Wind direction, wind speed, and stability classes are given in Tables 3, 4, and 5.Murray & Trettel, Inc. 60o Wrst Bank Drive, Suite A Palatine, Illinois 6oo67 (847)963-9oo0 Table 3 Wind Direction Classes IF IF IF IF IF IF IF IF IF IF IF IF IF IF IF IF 348.750 <11.250 <33.750 <56.250 <78.750 <101.250 <123.750 <146.250 <168.75c <191.250 <213.750 <236.250 <258.750 <281.250 <303.750 <326.250 <WD <WD <WD <WD <WD <WD <WD <WD <WD <WD <WD <WD <WD <WD <WD <WD <11.250 33.750 56.250 78.750 101.250 123.750 146.250 168.750 191.250 213.750 236.250 258.750 281.250 303.750 326.250 348.750 THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class Is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Table 4 Wind Speed Classes IF 0.0 mph < WS < 0.5 mph THEN Class is IF 0.5 mph < WS < 3.5 mph THEN Class is IF 3.5 mph < WS < 7.5 mph THEN Class is IF 7.5 mph < WS < 12.5 mph THEN Class is IF 12.5 mph < WS :S 18.5 mph THEN Class is IF 18.5 mph < WS < 24.5 mph THEN Class is IF 24.5 mph < WS THEN Class is 1 2 3 4 5 6 7 Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 6oo67 (847)963-9000 Table 5 Atmospheric Stability Classes Differential Temperature Interval Class (in 0 CI100m) (1'Differential Temperature Interval (in OF over the 200-33ft ranaa) (2)Differential Temperature Interval (in OF over the 375-33ft rann (2)Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable AT <-1.9-1.9 < AT < -1.7-1.7 < AT < -1.5-1.5 < AT < -0.5-0.5 < AT < 1.5 1.5 < AT < 4.0 4.0 < AT AT <-1.8 < AT <-1.6 < AT <-1.4 < AT <-0.5 < AT <1.3< AT <3.6< AT-1.8-1.6-1.4-0.5 1.3 3.6-3.6 <-3.2 <-2.9 <-1.0 <2.8 <7.5 <AT AT AT AT AT AT AT-3.6-3.2-2.9-1.0 2.8 7.5 (1 from ANSI/ANS 2.5 (2) ANSIIANS 2.5 intervals scaled for instrument heights on the LaSalle meteorological tower Murray & Trettel, Inc. 6o0 First Bank Drive, Suite A Palatine, illinois 60067 (847) 963-9000 The following two programs were used to calculate doses resulting from radioactive releases: 1. XOQDOQ: Computer Program for the Meteorological lEvaluation of Routine Effluent Releases at Nuclear Power Stations (NUREG/CR-2919).

The program is based on the theory that material released to the atmosphere will be normally distributed (Gaussian) about the plume centerline.

A straight-line trajectory is assumed between the point of release and all receptors.

The program implements the assumptions outlined in Section C of NRC Regulatory Guide 1.111. In evaluating routine releases from nuclear power plants, it primarily is designed to calculate annual relative effluent concentrations, X1Q values and annual average relative deposition, DIQ values.Output from the XOQDOQ program is used as input to the GASPAR program.2. GASPAR Ih: A Code System for Evaluation of Radiological Impacts Due to the Release of Radioactive Material to the Atmosphere During Normal Operation of Light Water Reactors (NUREG-0597).

GASPAR is a program written for the evaluation of radiological impacts due to the release of radioactive material to the atmosphere during normal operation of reactors.

The GASPAR code implements the radiological impact models of NRC Regulatory Guide 1.109, Revision 1, for atmospheric releases.

The program is used to estimate the maximum individual doses at selected locations in the vicinity of the plant.Murray & Trettel, Inc. 60o Pirst Bank Drive, Suite A Palatine, illinois 60067 (847) 963-9000 Mw-ray & 71rettel,.Tne.

6oo Mrst Bank Drive, sidteA Palatine, Illinois 6oo67 (847)963-gooo 5. Results 5.1 Instrument Maintenance The maintenance program followed during 2011 was composed of routinely scheduled visits, preventative maintenance procedures, and equipment repairs.Routine monthly visits were made to inspect the sensing and recording systems for proper operation.

In addition, routine maintenance and calibration checks of all tower-mounted and ground level equipment were performed every four months. A description of the calibration and field procedures is found in the Murray and Trettel, Inc. "P1009 Procedures Manual" (July 2010).In January, the 375 ft. wind speed sensor was replaced due to ice build-up on the cups.In May, the annual tower inspection was performed.

In August, a problem with the digital recorder phone line was repaired.In October, 2 bad heat lamps were replaced during a calibration.

In November, 6 side lights were replaced.

Also in November, the 33' wind direction sensor was replaced due to spiking.In December, the digital recorder was unreachable by modem. The unit was rebooted to restore proper operation.

On that same day, the UPS was replaced.No other significant problems were encountered with the equipment, and at the end of the annual period, no problems were evident at the site.Murray & Trettel, Inc. 6oo First Bank Driue, Suite A Palatine, Ilinois 60067 (847) 963-9000 5.2 Data Recovery The record of data recovery for the year is summarized in Table 6.Table 6 LaSalle Site Data Recovery Summary 2011 Recovered Elevation Hours Measurement Wind Speed Wind Speed Wind Speed Wind Direction Wind Direction Wind Direction Ambient Temperature Differential Temperature Differential Temperature Precipitation 33 ft.200 ft.375 ft.33 ft.200 ft.375 ft.33 ft.200-33 ft.375-33 ft.10ft.8754 8757 8648 8746 8757 8757 8757 8757 8757 8638 Recovered Percent 99.9 100.0 98.7 99.8 100.0 100.0 100.0 100.0 100.0 98.6 Lost Hours 6 3 112 14 3 3 3 3 3 Percent Changed 0.1 0.1 1.3 0.9 0.4 0.4 0.1 0.3 0.8 122 1.6 AVERAGE*99.8* average of prority parameters (all except precipitation)

Valid Recovered Hours Percent Lost Hours 17 3 112 Lower Level Joint Frequency

%Middle Level Joint Frequency

%Upper Level Joint Frequency

%8743 8757 8648 99.8 100.0 98.7 Murray & Trettel, Inc. 6oo First Bank Drive, SuiteA PalatMe, Illinois 60067 (847) 963-90oo 5.3 Summary of Billings for Equipment Repairs, Replacement Parts, and Other Work not Included in Fixed-Cost Maintenance Agreement

-2011 Description

-LaSalle Cost January Meteorological equipment maintenance

$ 2,264.12 Meteorological parts, materials, and contractor services 122.40 February Meteorological equipment maintenance 210.00 Special Request 170.00 March Meteorological equipment maintenance 0.00 Meteorological parts, materials, and contractor services 287.61 Anif Meteorological equipment maintenance 460.20 Special Request 127.50 Meteorological parts, materials, and contractor services 228.28 June Meteorological equipment maintenance 240.00 Meteorological parts, materials, and contractor services 0.00 JuWV-none- 0.00 Augs Meteorological equipment maintenance 334.40 September Meteorological parts, materials, and contractor services 196.36 October Meteorological equipment maintenance 480.00 Meteorological parts, materials, and contractor services 491.69 November Meteorological equipment maintenance 1,420.14 Meteorological parts, materials, and contractor services 848.84 December Meteorological equipment maintenance 425.20 Annual Total: $ 8,306.74 Murray & 7'etteI, InC. 60o FirstBank Drive, SuiteA Palatine, iM is 60o67 (847) 963-90O0 5.4 Stability Wind Rose Data The quarterly and annual stability wind roses are given in Tables 7 through 11. Wind speed classes have been altered to reflect the sensor threshold.

For the year, winds measured at 375 ft. most frequently came from the South-Southwest (9.63%) and fell into the 12.6-18.5 mph wind speed class (29.27%).

Calms (wind speeds at or below the sensor threshold) were measured 0.00% of the time and speeds greater than 24.5 mph were measured 15.48% of the time.Stability based on the 375-33 ft. differential temperature most frequently fell into the neutral classification (53.61%).Murray & Trettel, Inc. 6oo FI-tBank Driue, SuiteA Palatine, Illrwis 6oo67 (847) 963-gooo TABLE 7-14-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction January-March.

2011 375Ft-33Ft Delta-T (F)Number of Observations

-2050 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SSE S 5SW SW WSW W WNW NW N TOTAI EU M SU N 5. MS ES TTAL EU MU C SU A N L SS M S ES EU MU 1 SU-N 3 SS 15 ES OEMU SU-N 7 SS MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.10 0.00 0.00 0.00 0.00 0.00 0.49 0.10 0.00 0.00 0.00 0.00 0.00 1.02 0.00 0.10 0.00 0.00 0.00 0.00 1.61 0.29 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.83 0.00 0.00 0.00 0.00 0.00 0.00 0.73 0.15 0.00 0.00 0.00 0.00 0.00 0.44 0.59 0.15 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.54 0.10 0.10 0.00 0.00 0.00 0.00 1.32 0.34 0.15 0.00 0.00 0.00 0.05 2.10 0.49 0.00 0.00 0.00 0.00 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.78 0.24 0.05 0.15 0.00 0.00 0.00 0.00 0.00 0,00 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.10 0.10 0.00 0.00 0.00 0.00 0.00 0.78 0.24 0.05 0.00 0.00 0.00 0.00 0.83 0.39 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.15 0.20 0.00 0.00 0.00 0.00 0.00 0.34 0.20 0.00 0.00 0.00 0.00 0.00 0.44 0.24 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.59 0.20 0.10 0.00 0.00 0.00 0.00 0.54 0.34 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.68 0.15 0.10 0.00 0.00 0.00 0.00 1.02 0.24 0.29 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.20 0.00 0.05 0.00 0.00 0.00 0.05 0.73 0.10 0.05 0.00 0.00 0.00 0.00 0.59 0.59 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.73 0.54 0.00 0.00 0.00 0.00 0.00 1.27 0.93 0.24 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.20 0.00 0.00 0.00 0.00 0.00 0.54 0.05 0.00 0.05 0.00 0.00 0.00 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.29 0.05 0.00 0.00'0.00 0.00 0.00 0.63 0.15 0.15 0.05 0.00 0.00 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.49 0.15 0.00 0.00 0.00 0.00 0.00 0.93 0.34 0.00 0.00 0.00 0.00 0.00 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.49 0.15 0.00 0.00 0.00 0.00 0.00 1.85 0.59 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.20 0.10 0.00 0.00 0.00 0.00 0.00 1.02 0.10 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.63 0.49 0.00 0.00 0.00 0.00 0.00 0.00 5.32 1.37 0.15 0.00 0.00 0.00 0.00 0.05 13.41 3.61 0.83 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.63 0.49 0.00 0.00 1.12 0.00 0.00 0.00 0.00 5.32 1.37 0.15 0.00 6.83 EU NJ 8aSU-H 1 SS 2MS ES EUI 1 K)3 SU-N 1SS 8MS ES 0.00 0.00 0.00 0.78 0.10 0.00 0.00 0.00 0.00 0.00 2.29 0.44 0.00 0.00 0.00 0.00 0.00 0.73 0.39 0.00 0.00 0.00 0.00 0.00 1.32 0.54 0.10 0.00 0.00 0.05 13.41 3.61 0.83 0.10 18.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.93 0.63 0.24 0.00 0.00 0.83 0.44 0.29 0.05 0.00 1.07 0.98 0.39 0.10 0.00 2.34 1.37 0.15 0.10 0.05 0.98 0.39 0.05 0.00 0,10 18.59 8.88 2.24 0.29 0.10 18.59 8.88 2.24 0.29 30.10 Murray & Trettel, Inc. 6oo First Bank Drive, Si'teA Palatine, Illinois 6o067 (847)963-9ooo

TABLE 7 continued-15-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction January-March.

2011 375Ft-33Ft Delta-T (F)SPEED ----------------------------------

W IND DIRECTION CLASSES ----------------------------------

.........

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SE SSE 5 SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU 1IU 9 SU-N 2 SS 4MS ES EU G KJ T SU N 2 SS 4145 ES 0.00 0.00 0.00 1.71 0.20 0.00 0.00 0.00 0.00 0.00 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.44 0.15 0.10 0.00 0.00 0.00 0.00 0.34 0.00 0.00 0.00 0.00 0.00 0.00 1.32 0.10 0.00 0.00 0.00 0.00 0.00 0.68 0.00 0.00 0.00 0.00 0.00 0.00 3.12 0.20 0.00 0.00 0.00 0.00 0.00 0.68 0.00 0.00 0.00 0.00 0.00 0.00 1.32 0.49 0.00 0.00 0.00 0.00 0.00 0.49 0.05 0.00 O.00 0.00 0.00 0.00 0.20 0.63 0.05 0.00 0.00 0.00 0.00 0.15 0.29 0.00 0.00 0.00 0.00 0.00 0.73 0.73 0.10 0.00 0.00 0.00 0.00 0.15 0.59 0.00 0.00 0.00 0.00 0.00 0.34 0.24 0.15 0.05 0.00 0.00 0.00 0.29 0.15 0.05 0.00 0.00 0.00 0.00 0.20 0.44 0.15 0.15 0.00 0.00 0.00 0.29 0.73 0.20 0.00 0.00 0.00 0.00 0.39 0.59 0.05 0.00 0.00 0.00 0.05 0.24 1.12 0.39 0.00 0.00 0.00 0.00 0.24 1.22 0.54 0.00 0.00 0.00 0.05 0.15 1.32 0.88 0.00 0.00 0.00 0.00 0.10 0.24 0.39 0.00 0.00 0.00 0.00 0.44 0.83 0.73 0.00 0.00 0.00 0.00 0.83 0.29 0.15 0.00 0.00 0.00 0.00 0.44 0.78 0.29 0.00 0.00 0.00 0.00 1.56 1.90 0.15 0.00 0.00 0.00 0.00 0.63 1.37 0.10 0.00 0.00 0.00 0.00 3.12 1.56 0.10 0.05 0.00 0.00 0.00 0.39 0.24 0.00 0.00 0.m0 0.00 O.00 0.59 0.29 0.00 0.00 0.00 0.00 0.00 0.63 0.00 0.00 0.00 0.00 0.00 0.00 0.00 16.20 9.27 1.90 0.24 0.00 0.00 0.00 0.10 6.15 7.46 2.63 0.00 0.00 0.00 16.20 9.27 1.90 0.24 27.61 0.00 0.10 6.15 7.46 2.63 0.00 16.34 TOT 5.05 3.95 7.32 8.54 5.85 4.00 4.05 3.27 4.78 5.27 8.54 5.41 5.60 10.24 12.59 4.54 100.00 0.00 0.00 0.24 60.29 31.07 7.76 0.63 100.00 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW Nf NNW TOTAL 0.00 0.00 0.00 5.02 0.68 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.05 2.83 6.00 0.88 1.02 0.24 0.24 0.00 0.00 0.00 0.00 0.00 7.76 0.78 0.00 0.00 0.00 0.00 0.00 4.10 1.66 0.10 0.00 0.00 0.00 0.00 2.15 1.66 0.20 0.00 0.00 0.00 0.00 1.90 1.95 0.20 0.00 0.00 0.00 0.00 1.76 1.07 0.34 0.10 0.00 0.00 0.00 2.34 1.56 0.73 0.15 0.00 0.00 0.10 2.15 2.44 0.59 0.00 0.00 0.00 0.05 2.83 4.00 1.66 0.00 0.00 0.00 0.00 2.05 1.95 1.37 0.05 0.00 0.00 0.00 3.02 1.80 0.88 0.10 0.00 0.00 0.00 4.78 4.73 0.63 0.10 0.00 0.00 0.00 8.20 4.00 0.24 0.15 0.00 0.00 0.05 3.41 0.88 0.20 0.00 0.00 0.00 0.24 60.29 31.07 7.76 0.63-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW W NNW TDTAL 0.00 0.15 0.59 1.12 1.95 1.90 0.15 0.00 0.05 0.83 0.88 1.17 0.68 0.34 0.00 0.05 0.73 1.80 2.63 1.41 0.68 0.00 0.10 0.83 0.88 2.73 3.32 0.68 0.00 0.05 0.39 1.12 1.95 1.80 0.54 0.00 0.10 0.20 1.07 1.32 0.88 0.44 0.00 0.10 0.34 0.54 0.78 1.56 0.73 0.00 0.10 0.05 0.88 0.98 0.78 0.49 0.00 0.00 0.15 0.93 1.56 0.93 1.22 0.00 0.05 0.24 0.93 1.22 1.02 1.80 0.00 0.05 0.39 1.27 2.44 2.00 2.39 0.00 0.05 0.20 0.53 1.00 0.73 2.00 0.00 0.10 0.34 0.98 1.61 1.27 1.51 o.00 0.10 0.63 1.27 2.54 3.61 2.10 0.00 0.10 0.63 2.44 3.95 4.83 0.63 0.00 0.00 0.29 1.27 1.46 0.88 0.63 0.00 1.12 6.83 18.00 30.10 27.61 16.34-WIND SPEED CLASSES-CALM< 3.5 mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatihe, Illinois 6o067 (847) 963-9ooo TABLE 8-16-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction April-June, 2011 375Ft-33Ft Delta-T (F)Number of Observations

-2183 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

EU MU SU N SS MS ES TOTAL CLASS N NNE NE ENE E ESE SE SSE 5 SSW SW WSW W WNW NW NNW TOTAL EU KU C SU A N L SS 4MS ES EU KU 1 SU-N 3 SS MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.18 0.18 0.14 0.05 0.00 0.00 0.05 0.87 0.09 0.05 0.00 0.00 0.05 0.46 0.37 0.23 0.00 0.00 0,00 0.00 0.00 0,00 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0U00 0.00 0.00 0.00 0,00 0.00 0.00 0,05 0.00 0.05 0,00 0.00 0.00 0.00 0.46 0.27 0.09 0.00 0.00 0.00 0.14 0.78 0.23 0.09 0.00 0.05 0.14 0.27 0.96 0.82 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.32 0.05 0.05 0.00 0.00 0.00 0.05 0.78 0.19 0.09 0.00 0.00 0.00 0.00 1.79 0.27 0.09 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.55 0.23 0.05 0.00 0.00 0.00 0.00 1.37 0.18 0.05 0.00 0.00 0.00 0.14 1.33 0.37 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.32 0.14 0.05 0.00 0.00 0.00 0.09 0.69 0.23 0.14 0.00 0.00 0.00 0.27 0.82 0.41 0.27 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.09 0.09 0.00 0.00 0.05 0.05 0.69 0.27 0.18 0.00 0.00 0.00 0.09 1.33 0.60 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.37 0.18 0.05 0.00 0.00 0.00 0.00 0.41 0.14 0.14 0.00 0.00 0.00 0.05 0.41 0.41 0.27 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.37 0.05 0.00 0.00 0.00 0.00 0.00 1.15 0.23 0.32 0.05 0.00 0.05 0.00 0.55 0.37 0.37 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.37 0.05 0.00 0.00 0.00 0.00 0.00 0.55 0.14 0.05 0.05 0.00 0.00 0.09 1.19 0.41 0.27 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.14 0.05 0.00 0.00 0.00 0.05 0.55 0.55 0.18 0.00 0.05 0.09 0.05 1.15 0.32 0.55 0.00"0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.37 0.05 0.09 0.00 0.00 0.00 0.09 0.32 0.10 0.23 0.00 0.00 0.00 0.09 0.50 0.46 0.23 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.41 0.05 0.05 0.00 0.00 0.00 0.00 0.41 0.05 0.32 0.00 0.00 0.00 0.00 0.78 0.64 0.14 0.00 0.00 0.00 0.00 0.09 0.00 0.05 0.00 0.00 0.00 0.00 0.27 0.14 0.05 0.00 0.00 0.00 0.00 0.32 0.27 0.32 0.00 0.00 0.00 0.05 1.88 0.41 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.09 0.05 0.00 0.00 0.00 0.00 0.00 0.78 0.41 0.32 0.00 0.00 0.00 0.00 1.69 0.59 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.05 0.32 0.14 0.00 0.00 0.00 0.00 0.09 0.64 0.41 0.23 0.00 0.00 0.00 0.05 1.10 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.23.0.05 0.05 0.00 0.00 0.00 0.14 0.50 0.14 0.05 0.00 0.00 0.00 0.05 0.69 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.55 0.00 0.18 0.00 0.00 0.00 0.00 0.05 5.08 1.83 0.78 0.05 0.00 0.00 0.05 0.73 10.81 3.71 2.75 0.09 0.09 0.09 0.32 1.65 16.54 6.69 2.75 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.56 0.00 0.18 0.00 0.73 0.00 0.05 5.08 1.83 0.78 0.05 7.79 EU MU 8 5U-N 3 SS 2HS ES EU 1 KJ 3 SU-N 1SS 8HS ES 0.05 0.73 10.81 3.71 2.75 0.09 18.14 0.32 1.65 16.54 6.69 2.75 0.14 28.17 Murray & Trettel, Inc. 6oo FirstBank Driue, teA Palatine, Illinois 60067 (847)96"-gooo

'TABLE 8 continued-17-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction April-June.

2011 375Ft-33Ft Delta-T (F)SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SE SSE S SSW Sw wSw w w Nw NR "TOTAL EU Kil Su N SS 1H ES TOTAL EU 1MU 9 SU-N 2 SS-4MS ES EU G HU T SU N 2 SS 4MS ES 0.00 0.05 0.18 0.14 0.00 0.00 0.00 a.a0 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.46 0.41 1.05 0.32 0.00 0.00 0.00 0.05 0.00 0.32 0.00 0.00 0.00 0.00 0.00 0.18 2.02 0.09 0.00 0.00 0.00 0.09 0.05 0.73 0.00 0.00 0.00 0.00 0.00 0.18 1.14 0.18 0.00 0.00 0.00 0.00 0.00 1.65 0.00 0.00 0.00 0.00 0.DO 0.00 0.73 0.27 0.00 0.00 0.00 0.00 0.05 1.24 0.18 0.00 0.00 0.00 0.00 0.00 0.78 0.46 0.23 0.00 0.00 0.00 0.00 0.73 0.32 0.05 0.00 0.00 0.00 0.00 0.55 0.87 0.09 0.00 0.00 0.00 0.00 1.05 0.87 0.05 0.00 0.00 0.00 0.00 0.41 0.37 0.14 0.00 0.00 0.00 0.00 0.27 0.32 0.00 0.00 0.00 0.00 0.05 0.64 0.32 0.09 0.00 0.00 0.09 0.00 0.64 0.69 0.18 0.00 0.00 0.00 0.00 1.19 0.55 0.37 0.00 0.00 0.09 0.09 1.05 1.60 0:00 0.00 0.00 0.00 0.14 1.37 0.96 0.14 0.00 0.00 0.00 0.09 0.96 0.60 0.00 0.00 0.00 0.00 0.00 1.37 0.92 0.00 0.00 0.00 0.00 0.05 0.41 0.09 0.00 0.00 0.00 0.00 0.05 1.74 0.78 0.09 0.00 0.00 0.00 0.00 0.87 0.23 0.09 0.00 0.00 0.00 0.00 1.69 1.42 0.14 0.00 0.00 0.00 0.00 0.60 0.41 0.00 0.00 0.00 0.00 0.00 1.05 0.32 0.05 0.00 0.00 0.00 0.00 0.37 0.14 0.00 0.00 0.00 0.00 0.00 0.32 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.09 0.50 1.19 16.81 7.88 1.33 0.00 0.00 0.00 0.32 0.32 10.90 5.45 0.37 0.00 0.50 1.19 16.81 7.88 1.33 0.00 27.81 0.32 0.32 10.90 5.45 0.37 0.00 17.36 TOT 3.11 7.19 6.83 8.15 5.91 6.18 6.00 5.13 5.91 8.98 6.92 5.82 7.83 8.47 5.08 2.47 100.00 0.18 1.19 3.94 60.70 25.56 8.15 0.27 100.00 Wind Direction by Stability N EIE HE ENE E ESE SE SSE S SSW SW WSW IW NW KW NNW TOTAL.0.00 0.09 0.69 1.56 0.50 0.23 0.05 0.14 0.64 0.82 3.62 1.65 0.32 0.00 0.00 0.09 0.27 5.63 0.60 0.23 0.00 0.00 0.00 0.32 6.64 0.96 0.23 0.00 0.00 0.00 0.41 3.80 1.24 0.46 0.00 0.00 0.05 0.14 3.71 1.74 0.55 0.00 0.00 0.00 0.05 2.84 2.47 0.60 0.05 0.00 0.05 0.00 2.79 1.33 0.82 0.14 0.00 0.09 0.14 3.44 1.60 0.60 0.05 0.05 0.18 0.18 4.26 3.16 1.15 0.00 0.00 0.00 0.41 3.57 2.24 0.69 0.00 0.00 0.00 0.05 3.53 1.74 0.50 0.00 0.00 0.00 0.09 5.18 1.83 0.73 0.00 0.00 0.00 0.00 4.86 2.98 0.64 0.00 0.00 0.00 0.18 3.53 1.05 0.32 0.00 0.00 0.00 0.18 1.74 0.46 0.09 0.00 0.18 1.19 3.94 60.70 25.56 8.15 0.27-STABILITY CLASSES-Extramely Unstable Moderately Unstable Sl ightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable Wind Direction by Wind Speed N NE ENE E ESE SE SSE S SSW S WSW W WNW N NNW TOTAL 0.00 0.05 0.55 1.05 1.10 0.37 0.00 0.00 0.09 0.82 1.24 2.34 2.34 0.37 0.00 0.00 0.41 1.10 2.15 2.29 0.87 0.00 0.00 0.82 1.60 1.97 2.11 1.65 0.00 0.00 0.50 1.15 1.79 1.01 1.47 0.00 0.00 0.37 1.24 2.02 1.47 1.10 0.00 0.05 0.60 0.69 1.19 1.51 1.97 0.00 0.05 0.41 1.74 1.42 0.92 0.60 0.00 0.05 0.41 0.78 1.97 1.10 1.60 0.00 0.05 0.46 1.33 2.20 2.11 2.84 0.00 0.05 0.50 0.82 1.28 2.61 1.65 0.00 0.14 0.50 0.78 1.56 2.29 0.55 0.00 0.14 0.46 0.92 2.47 2.66 1.19 0.00 0.05 0.14 1.51 2.52 3.25 1.01 0.00 0.05 0.50 1.37 1.24 1.42 0.50 0.00 0.00 0.32 0.82 0.96 0.37 0.00 0.00 0.73 7.79 18.14 28.17 27.81 17.36-WINO SPEED CLASSES-CALM< 3.5 aph 3.6 -7.5 aph 7.6 -12.5 WPh 12.6 -18.5 aph 18.6 -24.5 Wph 3 24.5 mph Murray & Trettel, Inc. 6oo First Bank Drive, Sufte A Platane, Illinois 60067 (847)963-9000 TABLE9-18-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction July-September.

2011 375Ft-33Ft Delta-T (F)uibTer of Observations

-2208 Values are Percent Occurrence SPEED ----------------------------------

W IND DIRECTION CLASSES -------------------------

..................-

STABILITY CLASSES ----------

NW NNW TOTAL EU MU SU N 55 MS ES TOTAL CLASS H NNE NE ENE E ESE SE SSE S SSW S W SW W WNW EU KU C SU A N LSS H15 ES EU Mi 1 SU-N 3 55 HS ES 0Ell.EU 4 SU-N 7SS 1E ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.05 0.00 0.00 0.00 0.00 1.00 0.27 0.14 0.00 0.00 0.00 0.09 1.49 0.50 0.09 0.00 0.00 0.00 0.09 1.40 0.68 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.00 0.00 0.00 0.00 0.00 0.05 0.72 0.59 0.18 0.00 0.00 0.00 0,14 0.91 0.72 0.23 0.00 0.00 0.00 0.32 1.09 1.36 0.36 0.00 0.00 0.00 6,00 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.91 0.18 0.09 0.05 0.00 0.00 0.05 0.95 1.18 0.27 0.00 0.00 0.00 0.23 0.95 0.45 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.09 0.00 0.00 0.00 0.00 0.00 0.91 0.72 0.23 0.00 0.00 0.00 0.00 0.50 0.91 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.86 0.32 0.14 0.00 0.00 0.00 0.00 0.72 1.13 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.54 0.27 0.05 0.00 0.00 0.00 0.00 0.86 0.82 0.27 0.00 0.00 0.65 0.05 0.14 0.50 0.69 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.45 0.14 0.00 0.00 0.00 0.00 0,00 0.59 0.36 0.45 0.00 0.00 0.00 0.09 0.63 0.27 0.36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.95 0.09 0,27 0.00 0.00 0.00 0.00 0.45 0.14 0.50 0.09 0.00 0.00 0.00 0.18 0.14 0.23 0.14 0.00 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0.09 0.05 0.00 0.00 0.00 0.00 0.05 0.36 0.32 0.41 0.00 0.00 0.00 0.00 0.82 0.32 0.72 0,05 0.00 0.00 0.05 0.68 0.41 0.63 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.09 0.00 0.00 0.00 0.00 0.05 0.63 0.27 0.27 0.00 0.00 0.00 0.14 0.72 0.23 0.50 0.09 0.00 0.00 0.14 0.59 0.59 0.77 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.05 0.05 0.00 0.00 0.00 0.05 0.77 0.09 0.09 0.00 0.00 0.00 0.27 0.82 0.45 0.54 0.00 0.00 0.09 0.09 0.91 0.82 0.41 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.05 0.14 0.00 0,00 0.00 0.00 0.05 0.72 0.32 0.27 0.00 0.00 0.05 0.27 0.95 0.23 0.50 0.00 0.00 0.18 0.32 0.59 0.18 0.32 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.00 0.00 0.00 0.00 0.50 0.23 0.14 0.00 0.00 0.00 0.10 1.00 0.23 0.50 0.05 0.00 0.05 0.18 0.68 0.41 0.19 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.00 0.00 0.00 0.00 0.00 0.50 0.45 0.09 0.00 0.00 0.00 0.14 0.82 0.45 0.23 0.05 0.00 0.05 0.00 0.50 0.68 0.27 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.50 0.27 0.09 0.00 0.00 0.00 0.00 1.59 0.32 0.59 0.05 0.00 0.00 0.05 0.86 0.82 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.72 0.14 0.00 0.00 0.00 0.00 0.23 1.95 0.32 0.23 0.00 0.00 0.05 0.00 1.36 0.45 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.86 0.72 0.18 0.00 0.00 0.00 0.00 0.23 11.05 4.66 2.45 0.05 0.00 0.00 0.05 1.49 15.13 8.29 5.89 0.36 0.00 0.00 0.45 1.68 11.64 9.56 4.98 0.59 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.86 0.72 0.18 0.00 1.77 0.00 0.00 0.23 11.05 4.66 2.45 0.05 18.43 EU MU 8 SU-N 1SS 2MS ES EU 3 SU-N 1SS 81S ES 0.05 1.49 15.13 8.29 5.89 0.36 31.20 0.00 0.00 0.09 0.82 0.68 0.05 0.00 0.00 0.00 0.00 0.27 1.13 0.27 0.00 0.45 1.68 11.64 9.56 4.98 0.59 28.89 Murray & Trettel, Inc. 6oo First Bank Drive, S'teA Palatine, Illinois 6oo67 (847)963-9o00 TABLE 9 continued LaSalle County Generating Statlo 375 ft. Wind Speed and Direction SPEED ----------------------------------

WIND DIRECTION CLASSES CLASS N NNE NE ENE E ESE SE SSE S SSW-19-July-September.

2011 375Ft-33Ft Oelta-T (F)----------------------------------...

STA3ILITY CLASSES ----------

SW WSW W WNW NW NNW TOTAL EU Mu SU N 55 MS ES TOTAL EU I1U 9 SU-N 2SS 4 MS ES EU G MU T SU N 2SS 4 HS ES 0.00 0.05 0.09 0.63 0.59 0.05 0.00 0.00 0.00 0.00 0.00 0.05 0.14 0.00 0.00 0.00 0.05 0.14 0.54 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.41 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.27 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.45 0.27 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.32 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.14 0.09 0.14 0.00 0.00 0.00 0.09 0.05 0.00 0.00 0.00 0.00 0.00 0.32 0.41 0.05 0.00 0.00 0.00 0.05 0.41 0.32 0.00 0.00 0.00 0.00 0.05 0.63 0.50 0.54 0.09 0.00 0.00 0.00 0.09 0.45 0.00 0.00 0.00 0.00 0.00 0.27 0.82 0.50 0.00 0.00 0.00 0.00 0.00 0.59 0.32 0.00 0.00 0.00 0.14 0.45 1.27 0.18 0.00 0.00 0.00 0.00 0.00 0.18 0.05 0.00 0.00 0.00 0.00 0.32 0.32 0.27 0.09 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0,00 0.00 0.41 0.27 0.05 0.00 0.00 0.00 0.00 0.14 0.23 0.00 0.00 0.00 0.00 0.00 0.09 0.23 0.18 0.00 0.00 0.00 0.00 0.36 0.18 0.00 0.00 0.00 0.05 0.00 0.68 0.59 0.00 0.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 0.09-0.32 4.76 7.29 2.63 0.32 0.00 0.00 0.00 0.05 1.68 2.08 0.50 0.00 0.09 0.32 4.76 7.29 2.63 0.32 15.40 0.00 0.05 1.68 2.08 0.50 0.00 4.30 TOT 7.61 7.47 6.16 5.71 5.43 5.16 4.17 3.80 6.61 7.74 8.06 7.47 5.48 5.43 6.20 7.47 100.00 0.00 0.59 3.76 45.11 32.61 16.62 1.31 100.00 Wind Direction by Stability 0 N NNE NE ENE E ESE SE 5SE S 551 SW WSW W WNW01 M4NNIA TOTAL 0.00 0.05 0.27 4.57 2.13 0.59 0.00 0.00 0.00 0.54 2.90 3.22 0.82 0.00 0.00 0.00 0.27 3.08 2.22 0.54 0.05 0O00 0.00 0.09 2.54 2.67 0.41 0.00 0.00 0.00 0.00 1.90 2.76 0.77 0.00 0.00 0.05 0.05 1.59 2.17 1.27 0.05 0.00 0.00 0.09 1.99 1.09 1.00 0.00 0.00 0.00 0.00 1.81 0.54 1.09 0.36 0.00 0.00 0.14 2.67 1.81 1.81 0.18 0.00 0.00 0.36 2.81 2.13 2.08 0.36 0.00 0.09 0.41 2.85 2.81 1.90 0.00 0.00 0.23 0.77 2.76 2.31 1.31 0.09 0.00 0.05 0.36 2.58 1.22 1.13 0.14 0.00 0.05 0.14 2.40 2.17 0.63 0.05 0.00 0.00 0.05 3.40 1.81 0.91 0.05 0.00 0.09 0.23 5.25 1.54 0.36 0.00 0.00 0.59 3.76 45.11 32.61 16.62 1.31-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremly Stable Wind Direction by Wind Speed N NNE HE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.14 1.40 2.17 2.31 1.40 0.18 0.00 0.05 1.54 1.99 3.12 0.77 0.00 0.00 0.09 1.22 2.45 1.81 0.54 0.05 0.00 0.18 1.86 1.54 1.63 0.50 0.00 0.00 0.05 1.31 1.99 1.68 0.41 0.00 0.00 0.14 0.85 1.95 1.45 0.77 0.00 0.00 0.05 0.59 1.40 1.36 0.77 0.00 0.00 0.00 1.31 1.18 0.68 0.50 0.14 0.00 0.14 1.13 1.90 1.90 0.77 0.77 0.00 0.23 1.22 1.68 2.26 1.81 0.54 0.00 0.10 1.00 2.08 2.31 1.59 0.91 0.00 0.18 1.36 1.99 1.68 2.04 0.23 0.00 0.09 0.86 1.95 1.49 1.00 0.09 0.00 0.14 1.04 1.68 1.49 0.72 0.36 0.00 0.05 0.86 2.54 1.72 0.50 0.54 0.00 0.09 0.85 2.72 1.99 1.31 0.50 0.00 1.77 18.43 31.20 28.89 15.40 4.30-WIND SPEED CLASSES-CALM< 3.5 mph 3.6 -7.5nph 7.6 -12.5 qph 12.6 -]8.5 oph 18.6 -24.5 mph> 24.5 mph 0 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, finois 6o067 (847)963-90o0 TABLE 10-20-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction October-Decorber.

2011 375Ft-33Ft Delta-T (F)Number of Observations

-2207 Values are Percent Occurrence SPEED----------------------------------

WIND DIREMCTON CLASSES---------

STABILITY CLASSES ----------

CLASS H RNE HE ENE E ESE SE SSE S SSW SW SW W WNW NWN M TOTAL EU MU SU N SS MS ES TOTAL EU MU C SU A N L SS SHMS ES EU MU 1 SU-N 3 SS MS ES OEUM SU-N 7 SS MS ES EU MU 8 SU-N 1 55 2 M ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.09 0.00 0.00 0.00 0.00 0.14 1.09 0.14 0.18 0.00 0.00 0.00 0.05 2.85 0.05 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.05 0.00 0.00 0.00 0.00 0.05 0.05 0.05 0.00 0.00 0.00 0.05 0.86 0.23 0.14 0.00 0.00 0.00 0.00 1.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.68 0.18 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.15 0.09 0.00 0.00 0.00 O.O0 0.00 0.32 0.09 0.05 0.00 0.00 0.00 0.00 1.72 0.23 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.15 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.18 0.14 0.09 0.00 0.00 0.00 0.00 0.54 0.09 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.00 0.00 0.00 0.00 0.00 0.09 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.14 0.09 0.14 0.09 0.00 0.00 0.00 0.23 0.00 0.14 0.15 0.00 0.00 0.09 0.32 0.09 0.27 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.-18 0.00 0.14 0.00 0.00 0.00 0.00 0.68 0.14 0.05 0.05 0.00 0.05 0.00 0.54 0.23 0.09 0.36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.23 0.14 0.00 0.00 0.00 0.00 0.05 0.82 0.32 0.14 0.05 0.00 0.00 0.05 0.91 0.36 0.18 0.41 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.00 0.05 0.18 0.09 0.00 0,00 0.00 0.00 0.05 0.91 0.27 0.14 0.32 0.00 0.00 O.O0 1.45 0.36 0.82 0.63 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.05 0.00 0.00 0.00 0.00 0.00 0.54 0.72 0.09 0.05 0.00 0.00 0.05 1.31 0.91 1.04 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.05 0.00 0.00 0.00 0.36 0.05 0.14 0.05 0.00 0.00 0.00 0.68 0.54 0.14 0.32 0.00 0.09 0.18-0.54 0.50 0.14 0.41 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.36 0.09 0.09 0.00 0.00 0.00 0.00 1.04 0.72 0.14 0.09 0.00 0.05 0.09 0.32 0.86 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.41 0.09 0.05 0.00 0.00 0.00 0.00 1.22 0.54 0.14 0.00 0.00 0.00 0.00 1.09 1.09 0.54 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00-0.00 0.00 0.00 0.23 0.05 0.00 0.00 0.00 0.00 0.00 1.18 0.23 0.09 0.00 0.00 0.00 0.05 1.18 0.77 0.63 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.32 0.09 0.00 0.00 0.00 0.00 0.05 1.00 0.27 0.05 0.00 0.00 0.00 0.00 1.86 0.27 0.27 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.59 0.45 0.05 0.09 0.00 0.00 0.00 0.05 3.04 1.09 0.77 0.14 0.00 0.00 0.00 0.32 10.74 4.49 1.72 1.04 0.00 0.00 0.18 0.54 16.31 6.12 4.53 2.27 0.00 0.00 0.00 0.00 0.00 0.00 0.59 0.45 0.05 0.09 1.18 0.00 0.00 0.00 0.00 0.05 3.04 1.09 0.77 0.14 5.07 0.00 0.32 10.74 4.49 1.72 1.04 18.31 EU I KU 3 SO-N 1SS 8MS ES 0.15 0.54 16.31 6.12 4.53 2.27 29.95 Murruy & Trettel, Inc. 6oo Fr'st Bank Driue, SuiteA Palatine, Ilinois 6o067 (847)963-9ooo

' TASLE 10 continued-21-LaSalle Ccunty Generating Statlo 375 ft. Wind Speed and Direction October-December.

2011 375Ft-33Ft Delta-T (F)SPEED----------------------------------

WIND DIRECTION CLASSES ----------------------------------

.........

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NN TOTAL EU MU SU N SS MS ES TOTAL EU 1HU 9 SU-.N 2SS 4MS ES EU G MU T SU N 2 SS 4MS ES 0.00 0.00 0.09 0.77 0.18 0.00 0.00 0.00 0.00 0.00 1.00 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.36 0.00 0.00 0.00 0.00 0.00 0.32 0.00 0.00 0.00 0.00 0.00 0.00 0.82 0.05 0.00 0.00 0.00 0.00 0.00 0.36 0.00 0.00 0.00 0.00 0.00 0.00 0.50 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.14 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 O.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.05 0.23 0.09 0.00 0.00 0.00 0.00 0.09 0.00 0.32 0.00 0.00 0.00 0.14 0.23 0.14 0.27 0.27 0.00 0.00 0.00 0.32 0.27 0.45 0.18 0.00 0.00 0.09 0.82 0.59 0.54 0.32 0.00 0.00 0.00 1.09 1.72 0.91 0.27 0.00 0.00 0.00 1.00 1.36 0.59 0.50 0.00 0.00 0.00 2.04 3.85 1.18 0.45 0.00 0.00 0.00 0.45 0.77 0.18 0.05 0.00 0.00 0.00 0.50 0.77 0.27 0.00 0.00 0.00 0.05 0.41 0.27 0.36 0.00 0.00 0.00 0.00 0.18 0.50 0.09 0.05 0.00 0.05 0.05 0.77 1.68 0.50 0.00 0.00 0.00 0.00 0.41 1.54 0.50 0.00 0.00 0.00 0.05 1.13 0.68 0.09 0.00 0.00 0.00 0.00 0.59 1.45 0.18 0.00 0.05 0.00 0.14 1.27 0.32 0.05 0.00 0.00 0-09 0.05 0.91 0.27 0.00 0.23 0.05 0.05 0.14 0.63 9.47 7.11 2.72 1.36 0.14 0.63 9.47 7.11 2.72 1.36 21.48 0.00 0.0D 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.95 0.91 8.74 0.14 0.00 10.24 0.00 0.00 4.03 0.00 0.00 0.95 0.05 0.00 8.74 10.24 4.03 0.95 24.01 TOT 6.98 3.49 2.49 3.49 1.81 0.82 2.72 4.80 10.01 16.22 8.02 6.16 9.39 9.42 7.34 6.84 100.00 0.05 0.36 1.54 48.89 29.50 13.82 5.85 100.00 Wind Direction by Stability NNE HE ENE E ESE SE SSE S SSW S1 WS 1W WN4 W W NNW TOTAL 0.00 0.00 0.27 5.98 0.45 0.18 0.09 0.00 0.00 0.05 2.58 0.68 0.18 0.00 0.00 0.00 0.00 1.95 0.45 0.09 0.00 0.00 0.00 0.00 2.76 0.50 0.23 0.00 0.00 0.00 0.00 1.00 0.41 0.41 0.00 0.00 0.00 0.00 0.05 0.27 0.50 0.00 0.00 0.00 0.09 0.86 0.45 0.95 0.36 0.00 0.05 0.14 1.95 0.82 1.00 0.85 0.00 0.00 0.18 3.85 3.17 1.77 1.04 0.00 0.00 0.09 5.57 5.94 2.72 1.90 0.00 0.00 0.05 2.99 3.22 1.59 0.18 0.00 0.09 0.23 2.17 1.95 0.86 0.86 0.00 0.09 0.14 2.90 4.89 1.27 0.09 0.00 0.00 0.05 4.49 3.85 1.00 0.05 0.05 0.00 0.18 4.80 1.54 0.77 0.00 0.00 0.14 0.09 4.98 0.91 0.32 0.41 0.05 0.36 1.54 48.89 29.50 13.82 5.85-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.09 0.27 1.54 3.04 1.04 1.00 0.00 0.09 0.14 1.27 1.04 0.63 0.32 0.00 0.14 0.09 0.14 0.91 0.86 0.35 0.00 0.05 0.27 0.45 2.13 0.59 0.00 0.00 0.23 0.14 0.41 0.68 0.27 0.09 0.00 0.14 0.14 0.18 0.32 0.00 0.05 0.00 0.09 0.45 0.54 0.86 0.36 0.41 0.00 0.05 0.32 0.91 1.27 1.04 1.22 0.00 0.05 0.36 1.36 1.90 2.36 3.99 0.00 0.00 0.32 1.68 3.26 3.44 7.52 0.00 0.00 0.23 1.40 3.40 1.45 1.54 0.00 0.14 0.59 1.68 1.86 1.09 0.82 0.00 0.00 0.54 1.99 1.36 3.04 2.45 0.00 0.05 0.54 1.90 2.76 1.95 2.22 0.00 0.05 0.27 1.50 2.63 1.81 1.09 0.00 0.05 0.41 1.36 2.54 1.54 0.95 0.00 1.18 5.07 18.31 29.95 21.48 24.01-WIND SPEED CLASSES-CALM< 3.5 nph 3.6 -7.5 inph 7.6 -12.5 aph 12.6 -18.5 aph 18.6 -24.5 mph> 24.5 mph Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 6oo67 (847)963-9000 TABLE 11-22-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction January-December.

2011 375Ft-33Ft Delta-T (F)Number of (Observatlons

-8648 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES.........

STABILITY CLASSES ----------

EU MU SU N SS MS ES TOTAL CLASS H NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU M)C SU A N L SS HMS ES EU K)I SU-N 35S F6 ES.EU MU 4 SU-N 7 SS MS ES EU HU 8 SU-N 1SS ES EU 3 SU-N ISS 8a3S ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.03 0.02 0.00 0.00 0.00 0.00 0.46 0.16 0.07 0.01 0.00 0.00 0.07 1.12 0.19 0.10 0.00 0.00 0.01 0.15 1.56 0.31 0.05 0.02 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.06 0.00 0.01 0.00 0.00 0.00 0.01 0.51 0.23 0.08 0.00 0.00 0.00 0.08 0.82 0.34 0.12 0.00 0.01 0.03 0.15 0.88 0.71 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.00 0.01 0.00 0.00 0.00 0.00 0.44 0.10 0.06 0.01 0.00 0.00 0.02 0.75 0.46 0.13 0.00 0.00 0.00 0.07 1.36 0.35 0.08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.02 0.00 0.00 0.00 0.00 0.00 0.60 0.28 0.07 0.00 0.00 0.00 0.00 0.74 0.32 0.06 0.00 0.00 0.00 0.06 1.53 0,43 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.02 0.00 0.00 0.00 0.00 0.00 0.36 0.15 0.08 0.00 0.00 0.00 0.02 0.58 0.47 0.09 0.00 0.00 0.00 0.07 0.73 0.54 0.17 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.07 0.00 0.00 0.00 0.00 0.00 0.22 0.13 0.05 0.00 0.00 0.01 0.01 0.59 0.34 0.17 0.00 0.00 0.01 0.03 0.57 0.39 0.25 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.01 0.00 0.00 0.00 0.00 0.00 0.28 0.15 0.05 0.02 0.00 0.00 0.00 0.39 0.17 0.19 0.05 0.00 0.00 0.06 0.45 0.25 0.25 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00.0.00 0.00 0.00 0.01 0.03 0.00 0.00 0.00 0.00 0.00 0.38 0.05 0.10 0.00 0.00 0.00 0.00 0.72 0.17 0.24 0.05 0.00 0.02 0.00 0.45 0.27 0.19 0.16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.02 0.00 0.00 0.00 0.00 0.01 0.28 0.13 0.10 0.00 0.00 0.00 0.01 0.72 0.23 0.25 0.03 0.00 0.00 0.05 0.95 0.36 0.35 0.14 0.00 0.00 0.00 0.G0 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.03 0.00 0.00 0.00 0.00 0.02 0.32 0.13 0.09 0.00 0.00 0.00 0.07 0.73 0.29 0.22 0.10 0.01 0.02 0.05 0.95 0.46 0.56 0.21 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.01 0.01 0.00 0.00 0.00 0.01 0.43 0.05 0.05 0.00 0.00 0.00 0.09 0.60 0.47 0.22 0.01 0.00 0.02 0.06 0.99 0.77 0.49 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.06 0.00 0.01 0.00 0.00 0.01 0.38 0.15 0.12 0.01 0.00 0.01 0.07 0.65 0.22 0.24 0.09 0.00 0.07 0.13 0.71 0.49 0.21 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0. D0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.02 0.02 0.00 0.00 0.00 0.00 0.36 0.13 0.07 0.00 0.00 0.00 0.05 0.75 0.35 0.28 0.05 0.00 0.02 0.08 0.93 0.53 0.16 0.01 0.00 0.00 0.05 0.02 0.01 0,00 0.00 0.00 0.00 0.37 0.19 0.03 0.00 0,00 0.00 0.03 0.94 0.44 0.17 0.01 0.00 0.01 0.00 1.09 0.86 0.34 0.03 0.00 0.00 0.01 0.03 0.01 0.00 0.00 0.00 0.01 0.39 0.15 0.02 0.00 0.00 0.00 0.02 1.31 0.38 0.23 0.01 0.60 0.00 0.03 1.35 0.74 0.21 0.02 0.00 0.00 0.01 0.01 0.00 0.01 0.00 0.00 0.00 0.37 0.09 0.01 0.00 0.00 0.00 0.10 1.12 0.21 0.12 0.00 0.00 0.01 0.02 1.23 0.34 0.12 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.66 0.42 0.10 0.02 0.00 0.00 0.00 0.08 6.14 2.25 1.05 0.06 0.00 0.00 0.02 0.66 12.51 5.05 2.83 0.40 0.02 0.02 0.24 1.01 15.71 7.79 3.65 0.83 0.00 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0.66 0.42 0.10 0.02 1.20 0.00 0.00 0.08 6.14 2.25 1.05 0.06 9.59 0.02 0.66 12.51 5.05 2.83 0.40 21.48 0.24 1.01 15.71 7.79 3.65 0.83 29.27 Murrqy & Trettel, Inc. 6oo First Bank Drive, SuiteA Palatine, ll~nis 6oo67 (847) 963-9o00 TABLE 11 continued-23-LaSalle County Generating Statio 375 ft. Wind Speed and Direction SPEED ----------------------------------

WIND DIRECTION CLASSES CLASS 0 NNE NE ENE E ESE SE SSE S 5SW January-Deceiiber.

2011 375Ft-33Ft Delta-T (F)------------.-.-------

STABILITY CLASSES ----------

SW WSW W WNW NWl NNW TOTAL EU Nil SU N 55 MS ES TOTAL EU 1 MU 9 SU-N 2 SS 4 MS ES EU G MJ T SU N 2 SS 4 MS ES 0.00 0.02 0.09 0.80 0.24 0.01 0.00 0.00 0.00 0.00 0.29 0.01 0.03 0.00 0.02 0.12 0.12 0.47 0.35 0.03 0.00 0.00 0.01 0.00 0.24 0.00 0.00 0.00 0.00 0.00 0.05 1.06 0.16 0.00 0.00 0.00 0.02 0.01 0.45 0.00 0.00 0.00 0.00 0.00 0.05 1.35 0.19 0.00 0.00 0.00 0.00 0.00 0.58 0.00 0.00 0.00 0.00 0.00 0.00 0.52 0.27 0.07 0.00 0.00 0.00 0.01 0.43 0.06 0.02 0.00 0.00 0.00 0.00 0.25 0.38 0.14 0.00 0.00 0.00 0.00 0.22 0.15 0.02 0.00 0.00 0.00 0.00 0.39 0.53 0.12 0.00 0.00 0.00 0.00 0.32 0.36 0.09 0.00 0.00 0.00 0.03 0.28 0.22 0.16 0.12 0.00 0.00 0.00 0.24 0.20 0.13 0.05 0.00 0.00 0.03 0.50 0.44 0.21 0.12 0.00 0.02 0.01 0.61 0.87 0.32 0.07 0.00 0.00 0.01 0.81 0.75 0.39 0.15 0.00 0.02 0.03 0.87 1.77 0.39 0.12 0.00 0.00 0.03 0.59 0.94 0.34 0.01 0.00 0.00 0.03 0.40 0.81 0.36 0.00 0.00 0.00 0.05 0.59 0.68 0.23 0.00 0.00 0.00 0.01 0.25 0.39 0.21 0.01 0.00 0.01 0.02 0.91 0.77 0.25 0.02 0.00 0.00 0.00 0.44 0.55 0.22 0.00 0.00 0.00 0.01 1.19 1.05 0.10 0.00 0.00 0.00 0.00 0.49 0.86 0.07 0.00 0.01 0.00 0.03 1.35 0.59 0.09 0.01 0.00 0.00 0.00 0.52 0.17 0.00 0.00 0.00 0.03 0.01 0.62 0.30 0.00 0.06 0.00 0.01 0.00 0.51 0.00 0.00 0.00 0.03 0.03 0.19 0.54 11.71 7.86 2.15 0.49 0.00 0.00 0.09 0.12 6.87 6.29 1.87 0.24 0.19 0.54 11.71 7.86 2.15 0.49 22.98 0.09 0.12 6.87 6.29 1.87 0.24 15.48 TOT 5.90 5.55 5.67 6.43 4.73 4.04 4.23 4.27 6.87 9.63 7.87 6.23 7.15 8.36 7.72 5.35 100.00 0.06 0.54 2.41 53.61 29.67 11.67 2.05 100.00 Wind Direction by Stability U NNE NE ENE E ESE SE SSE S 5SW SW WSW W WNWM N NNW TOTAL 0.00 0.03 0.31 4.28 0.95 0.29 0.03 0.03 0.16 0.36 2.98 1.62 0.39 0.00 0.00 0.02 0.15 4.13 1.08 0.28 0.01 0.00 0.00 0.10 4.87 1.24 0.22 0.00 0.00 0.00 0.10 2.67 1.51 0.44 0.00 0.00 0.02 0.05 1.86 1.46 0.64 0.01 0.00 0.00 0.06 1.90 1.48 0.69 0.10 0.00 0.02 0.03 2.08 0.94 0.82 0.37 0.00 0.02 0.12 3.09 2.05 1.24 0.36 0.01 0.05 0.19 3.72 3.43 1.65 0.58 0.00 0.02 0.23 3.D6 3.05 1.46 0.05 0.00 0.08 0.27 2.64 1.99 1.01 0.25 0.00 0.03 0.15 3.42 2.45 1.01 0.08 0.00 0.01 0.05 4.12 3.41 0.73 0.05 0.01 0.00 0.10 4.93 0.00 0.06 0.14 3.86 0.06 0.54 2.41 53.61-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremly Stable 2.07 0.95 29.67 0.57 0.24 11.67 0.05 0.10 2.05 Wind Direction by Wind Speed N NNE HE ENE E ESE SE SSE S SSW SW WSW W WNW W NNW TOTAL 0.00 0.10 0.71 1.48 2.10 1.17 0.34 0.00 0.07 0.83 1.35 1.93 1.11 0.25 0.00 0.07 0.61 1.36 1.86 1.27 0.49 0.00 0.08 0.95 1.12 2.10 1.60 0.58 0.00 0.08 0.59 1.17 1.51 0.86 0.52 0.00 0.09 0.39 1.11 1.27 0.77 0.39 0.00 0.07 0.50 0.80 1.05 1.04 0.77 0.00 0.05 0.53 1.18 1.09 0.81 0.61 0.00 0.06 0.52 1.25 1.84 1.30 1.91 0.00 0.08 0.57 1.41 2.25 2.12 3.20 0.00 0.07 0.53 1.40 2.36 1.91 1.61 0.00 0.13 0.67 1.28 1.72 1.55 0.89 0.00 0.08 0.56 1.47 1.73 2.00 1.31 0.00 0.08 0.59 1.60 2.32 2.36 1.41 0.00 0.06 0.57 1.95 2.36 2.09 0.69 0.00 0.03 0.47 1.55 1.75 1.03 0.62 0.00 1.20 9.59 21.48 29.27 22.98 15.48-WIND SPEED CLASSES-CALM c 3.5 wph 3.6 -7.5 mph 7.6 -12.5 mPh 12.6 -18.5 aph 18.6 -24.5 rph: 24.5 mph Murray & Trettel, Inc. 6oo First Bank Drive, Si dteA Palatine, Zinois 60067 (847)963-9ooo 5.5 Preclpitation Monthly totals and the maximum 24-hour and maximum 1-hour precipitation amounts are summarized below. The month with the most measured precipitation was June*. The month with the least measured precipitation was January*.

The maximum 24-hour total was 1.86" (September) and the maximum 1-hour total was 0.80" (May*).Table 12 Precipitation Totals (Inches) -2011 LaSalle Site Month January February March April May June July August September October November December TOTAL: Total 0.10" 0.96*1.55*4.15 4.40'5.88*0.90*1.69 3.20 0.91" 3.40 2.04*Maximum 24-hour 0.07*0.55*1.03'0.93 1.85'1.64'0.42*0.90 1.86 0.47*1.18 1.37*Maximum 1-hour 0.02*0.19'0.45'0.31 0.80*0.72*0.13'0.35 0.27 0.19'0.41 0.31'29.18'* some data are missing -actual precipitation may be under-reported Murray & Trettel, lnc. 6oo First Bank Drive, SuiteA Palatine, Illinois 6o067 (847)963-9ooo 5.6 Doses Resulting from Airborne Releases The following are the maximum annual calculated cumulative offsite doses resulting from LaSalle County Station airborne releases.LaSalle County Generating Station: Dose gamma air (1)beta air (2)whole body (3)skin (4)organ (a) (infant-thyroid)

Maximum Value 4.160 x 10 mrad 1.380 x 10- mrad 1.816 x 10-2 mrem 4.240 x 10" mrem 7.473 x 1041 mrem Sector Affected South South South South South Compliance Status 10 CFR 50 Appendix I Yearly Objective% of Appendix I gamma air beta air whole body skin organ 10.0 20.0 5.0 15.0 15.0 mrad mrad mrem mrem mrem 0.04 0.01 0.36 0.03 4.98 (1)(2)(3)(4)(a)Gamma Air Dose -GASPAR II. NUREG-0597 Beta Air Dose -GASPAR II. NUREG-0597 Whole Body Dose -GASPAR II, NUREG-0597 Skin Dose -GASPAR 11, NUREG-0597 Inhalation and Food Pathways Dose -GASPAR II, NUREG-0597 Murray & Trettel, Inc. 6oo FirstBank Drive, SuiteA Palatine, illinois 60o67 (847)963-9000 APPENDIX Murray & Trettel, Inc. 6oo 1Frst Bank Drive, Suite A Palatine, Illinois 6o067 (847) 963-9o00 Exelon Contract Number 455465 D4 7110 I R-28 Page 1 of 6 LaSalle Meteorological Calibratior 0 Date: 2.- 5-II POWER SUPPLIES+12.000V

0.120V -12.OOOV +/- 0.120V A:+i2.- S V A:- (Z.o' y, V B:+ V B:-_ I__. 05"v Signal conditioners and Digital Recorder: Qinl d'..innrfifinnor Vnlfon flut AF AL AL EQUIV PRCP LO. -.!.0 V PRCPHI _06 V WS ZERO g, 1.'L-1 V WS SPANL, 5'0 0 .V WD ZERO, 000 V SPAN 35'V.ZERO 0,000 V T SPAN 'j-, )L'Vl V WSZERO ,Z 5"V WS SPAN V WDZEROLS0-0V WD AT, ZERO-LO-_

V AT, SPAN 5, C',x) V AT 2 ZERO. 0_. V AT, SPAN-j. -00,-) V 10 f t,-V W o 35 ft.-V -q6 mph SV %.O- mph-V 310 °.-zz.do .200 f f-- V -O. mph-- .V .S",O mph-0.a-.VIO, OV-V__._v 375 ft.Di3qital recorder AF AL 0.0 DO -1,00O , -._L- _!' mph -_ mph SbL), mph "-_mph°"5 0 *- °O. mph mphmph-- mph-10.0c) -0 9,qq 0 q -a Slanal Cond.0.000V + 0.050V 5.OOOV d: 0.050V 0.025V + 0.025V 2.500V + 0.025V 0.000v

0.100V 3.333Vi 0.100V 0.000V + 0.050V 5.OOOV

0.050V 0.025V + 0.025V 2.500V

0.025V 0.000V + 0.100V 3.333V +/- 0.1OOV 0.000Vao 0.050V 5.OO0V

0.050V 0.000V

0.050V 5.OOOV +/- 0.050V 0.025V. 0.025V 2.500V

0.025V 0.000V

0.100V 3.333V ,0.100V 0.OOV

0.050V 5.000V

0.050V 0.000V

0.050V 5.000V

0.050V Specifications Recorder AL EQUIV

0.01 AL EQUIV + 0.01k AL EQUIV + .Imph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV+ .AF AL EQUIV+ .1 0 F ALEQUIV+ ,mph AL EQUIV +.1mph AL EQUIV + 10 AL EQUIV + 1" AL EQUIV + .IF AL EQUIV +.1 0 F 0 WS ZERO-LC -fV" WS SPAN V.'1 WD ZERO.. 0L..V WD SPANILJLLV AT, ZERO...!2-L-V

'T, SPAN Yjiq7 v.2 ,ZERO-IOOl V AT 2 SPANJ:, OC3V Sv' 57-. mph-"V S.. mph____ v °--" :_V O,-___mph

_e_ mph-t J. .mph " mph 0 0 0 9, 9 -a AL EQUIV+ .1mph ALEQUIV+ .1mph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV +.10F AL EQUIV +.IF Ab- 144-11 Mwrray Tntel, Inc. -600 RFa Bank Dfiw, Sult A .Paailne, Iflinah .60067 3 (847) 963.9000 Exelon Contract Number 455465 LaSalle Meteorological Calibration D5 7/10 R-28 Page 2 of 6 Date: 2- ' -375 ft ii I TOWER MEASUREMENTS Ambiemble Ice Bath Measured Recorded Difference Specification 33 ft. Amb.AF AL I1,OOoF --- F S.qq °F -F 6, Q I °F -F*0.5 0 F Temneratures 200 ft. 4T 1 _AF AL-.F --°F O.o5 -F -oF 0.18OF 375 ft. .T4 AF AL b38F -F-,3°'F '- F 010 '. F -- F+/-0.180F WS stall Forw. WD Revr. WD TrackingA/ea 33 ft.AF AL mph .,+/- mph 15-11 ---WEnds 200 ft.AF AL..__ mph O, mph aQ -ISO 0-375 ft.AF AL Lmph -__mph%~c. ý --a Specification 0.5mph t 0.45mph 0013600 + 50 1800/540°

+/- 50 09 w-m 0 O/K Comments:

?3 V XSYtV W~oos37 ,'1 i-IVA MTi-Oa j 4.~MuwaM & Tnttetr Inan 600 Flist Bam& Dtive, Suite A Pahtfine, Minots 60067 R (847) 963-9000 Exelon Contract Number 455465 D6 7/10 R-28 Page 3 of 6 LaSalle Meteorological Calibration Date: Z -5"-I/Dates of Last Wind Sensor Bearing Replacements:

33 ft. 2001L 375ft.(6 mos.) Wind Speed: ;-!&- II -'o I I (12 mos.) Wind'Direction:

)0 1 -/ 1 10-1/ lU--/f)33 ft 200 375 ft.Aspirators:

____Operation of De-ice Heat Lamp System (Aug-Mar):

Operation of Rain Gauge: .QY Tips Poured -5 Tips Recorded UPS CHECK: 05 Debris screen: In Out Installed Removed Tower Lightinq Good Fair Poor Tower Condition Good Fair Poor Beacon IV3 El E1 Paint 0 r- El Side lights rZ El 0 Wiring RZ] n 0 Flasher 0Z En 0 .Shelter conditlon r- 0 n Note: Calibration Instruments:

Next Cal Due*AF = As Found -Psychrometer-S/N-tR I ZOOi, zol AL = As Left Digital multimeter-S/N-7 30 O6 .e- , 40--= no change (AF=AL) Digital multimeter-S/N -FS = Full Scale Technicians:

ij LorZ.. , t'.,,) /,4x Comments: )ams I Signature:

Muwam & Tmetw4 Inc. -600 Fiat Beank Driw, Suite A.- Pakting, illinobs .60067 2 (847) 963-9000 Exelon Contract Number 45546,.D7 7/10 R-28 Page 4 of 6 System Response Check Date: 2-/ /Site: LaSalle System: Microtel Low Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 20.0 +/-0.4 20.0 +/-0.4 20.0 +/-0.4 1085t2 108 +/-2 108 .2 6.80 +/-0.7 -6.00 :0.18 46.00 +/-0.18 Response As Found 1 0 05 10e) OL R esponse A 20 .0 2 0 .0 __ I S i o B _,,_ -C ,,._ _,_7 0 As Left L .-,- -Response ... I 3VU Scale 3 WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT ChecA .,__Expected 60.0 +/-0.4 60.0 +/-0.4 60.0 +/-0.4 324:+/-2 324:+/-2 324 +/-2 64.40 +/-0.7 2.00 +/-0.18 2.00 +/-0.18 Response As Found As Left .......Response Full Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT EP~ecte Expected 80.0 *0.4 80.0 +/-0.4 80.0 +/-0.4 432+/-2 432 +/-2 432 +/-2 93.20 +/-0.7 6.00 +/-0.18 6.00 +/--0.18 Response As Found Response L-iq. ____. _ 143) -13Z. " ,,L4 ___, __As Left --.- --Response Mwmjy & Trecu, Im-

600 FiRt Bad Diiw, Suim A. Palir.e Mllinois .60067 W (847) 963.9000 Exelon Contract Number 455461.D8 711 C R-28 Page 5 of e System Response Check Date: I-- '- -f Site: LaSalle System: Process Computer Low Scale A847 A848 A849 AB50 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 108.t2 108+/-k2 20.0 +/-0.4 20.0 :0.4 -4.00+/-0.18 20.0*0.4 108 .2 6.80 +0.7 -4.00*0.18 02.0 +/-0.01 Response__________

As Found Response i1 i54 AO.O A0 .0 -4.O " , OlO L),S O-- o.o .-As Left .. _ I ....Response A .1 Mid Scale A847 A548 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS -33' WD 33' T 200' AT Precipitation Expected 324 a2 324 :t2 60.0 +/-0.4 60.0 +/-0.4 8.00 +/-0.18 60.0 +/-0.4 324 +/-2 64.40 +/-0.7 8.00+/-0.18 0.60 +/-0.01 Response As Found Response 3Z~ i5 3'L .S 5 ,e qq CO° , I ,.3 .... ,0,oO As Left 60. -,0 -.-Response ....Full Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 432 +/-2 432 +/-2 80.0 +/-0.4 80.0+/-0.4 14.00+/-0.18 80.0+/-0.4 432 +/-2 93.2010.7 14.00+/-0.18 0.80 +/-0.01 Response As Found Response 78 .... 9 6'As Left ---" " ..-Response 1 Mwraya & Tremel, Inc-.. 600 Firsz Bank Dnue. Szdte A -Pal alma Illiias -60067 12 (847) 963-9000 Exelon Contract Number 45546!IDS 7/1C R-2E Page 6 of e System Response Check Dateý 9- 1 t Site: LaSalle System: Control Room Indicators Low Scale Check 200' WS 375' WS 200' WD 375' WD 375' &T Expected 20.0 +/-1.0 20.0 +/-1.0 108 *5.4 108*5.4 -4.00 +/-0.3 Response ....As Found Response 1L0 10 (O 00-AsLe ft ....Response Mid Scale Check '200' WS 375' WS 200' WD 375' WD 375 AT Expected 60.0 *1.0 60.0;1.0 324 +5.4 324 +/-5.4 8.00*0.3 Response As Found Response (00 6_ 3z g. 0 gC As Left -Response .....Full Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 80.0 +/-1.0 80.0 +/-1.0 432 +/-5.4 432 +/-5.4 14.00 +/-0.3 Response ....As Found Response 80 _ _ -__ _- 1L___ ( 'j.o0 As Left -.Response ...Ai5L~ q-I, Mumz'y & Tiemel, Inn. -600 Rust Bg~k Dnwe, Suite A -Pa~ine, lflinois -60067 W (84 7) 963-9000 Exelon Contract Number 455465 D4 7/10 R-28 Page 1 of 6 LaSalle Meteorological Calibrat-or Date: G4-k (1 POWER SUPPLIES+12.OOOV

0.120V -12.OOOV *0.120V A:+A2 Z -V A.- i7 0-3 V 13_+)7-___-Y8_V 30 v____Signal conditioners and Digital Recorder:-Q; nal frnrtifinnor Venlfn a ni AF A.....L...

AL EQUIV 10 ft.Dialtal recorder AF AL o D -a Specifications PRCP LOiOOV PRCPH1i.b Z V-~L V 0.0 WSZERO,6o7?-'

V WS SPANR.-$_

V WD ZERO O. O,-l V SPAN 5,-313 V ZERO , OOo V TSPAN S-,060 V WS ZERO A 02 5" V WSSPAN.;'q_

V WD ZEROOL.0-b V WD SPAN__ 333 V AT, ZERO 6.0 00 V AT, SPAN'1, _?q V AT 2 ZERO. cCL- V AT 2 SPAN_,ý 0O V 35 ft.V o.'mph ,O~V ý mph__v 0~-V1(6-V-~ZZOO a 200 f t.-- V O.- S mph_.___ V 570.0 mph-V 0 *1-V-v-_:_._v-=.v L-LL mph _- mphmph mph 0 s 0 124.Vj2,0

-*""mph.#OO .mph 3oO o -°o a_____a_____

Signal Cond.0.OOOV

0.050V 5.OOOV

0.050V 0.025Vk 0 .025V 2.500V

0.025V o.00OVit 0.100V 3.333V 1 0.I1OOV 0.OOOV + 0.050V 5.ODOV +/- 0.050V 0.025V

0.025V 2.500V

0.026V 0.000v

0. 1 00V 3.333VtO.10.IV 0.000V

0.050V 5.OOOVk * .050V 0.00OV

0.050V 5.O00V i 0.050V 0.025Vk 0 .025V 2.500V

0.02WV o.000vi*o.100V 3.333V 10.1IOOV 0.000V i 0.050V 5.OOOV +/- 0.050V O.OOOV

0.050V 5.000V i 0.050V Recorder AL EQUIV 1 0.01" AL EQUIV 1 0.01" AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 1I AL EQUIV + 1o AL EQUIV + .aF AL EQUIV + .1 0 F AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 1 0 AL EQUIV + 10 AL EQUIV + .1F AL EQUIV + .1F WS ZERO,, -o25 V WS SPAN _.___ V WD ZERO- 0o'b V WD SPAN 3-zi:35 V AT 1 ZERO' O0.' V AT, SPAN, f 5 V 2.ZERO oCýt V AT 2 SPAN(Sr 0 V 375 ft._- __V -.5,.=mph 2"Sb V -' -mph-av 3 6 f" v "-,I O,.CK 0________V I6,...?.o-V-' V O9 _T mph_-__mph 1ýý" -._mph_-_-mph

5. .0 -.AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV +.1OF AL EQUIV +.1 0 F/91 1-12-11 MwM& UTyeuw~cl

n. .600 Fint Bank Dvrwe, Suite A -Pakasfn, Iliiris -60067 2(947) 963-9000 Exelon Contract Number 455465 LaSalle Meteorological Calibration D5 7/10 R-28 Page 2 of 6 Date:'4.L-C

(. 1 TOWER MEASUREMENTS Ambient 3 ice Bat Temperatures 33 ft. Amb. 200 ft. A T,_AF AL AF AL 7L9.0 oF " F -- F .F 7!i.'25OF O- F F "-I. °F --- OF O, 1.5 °F -" F Q.10F -F iO.5 0 F 0O.18 0 F Measured Recorded Difference Specification 375 ft, ATI AF AL-- o.OoF OF"" 9-"OF OF=0 OF "-F+/--0.180F 33 ft, AF AL WSstall 0.__ mph 2. mph Forw.wD WD__Revr. WD 1-7 0 Tracking/wear OK Winds 200 ft.AF AL o,5 mph 7,mph L -375 ft.AF AL'ýý* mph O. 6 mph 0-K Specification 0.5mph + 0.45mph 00/3600 +/- 50 1800/540o

+/- 50 Comments: 33' W$b. W5' v 3-7 5-/ W-5 M9T 00%~7 f eaviMT 0~- O1Ot (evnoal MWoli64 rey-nd8, MT 0 10O5 1 Id rf J6-1MI, M 0009ii3)IF A&L 7iI MwtM & Tiu4 I=tc -600 Pint Bank Diiv; SuiteA -Jj~Pjdw l12irma -60067 11 (847) 963.9000 Exelon Contract Number 455465 D6 7/10 R-28 Page 3 of 6 LaSalle Meteorological Calibration Date: G,-(,-I/Dates of Last Wind Sensor Bearing Replacements:

33 ft~(6 mos.) Wind Speed: 200 ft.I 375 ft.i'(o il (12 mos.) Wind Direction:

l01-tO 33 ft. 200ft, 375 If.Aspirators:

P.K% OK 0-k Operation of De-Ice Heat Lamp System (Aug-Mar):

V,0 Operation of Rain Gauge: Tips Poured Tips Recorded____

UPS CHECK: Debris screen: -g)Out Installed Removed Tower Lighting Good Fair Poor Tower Condition Good Fair Poor Beacon 17 1 0 0 Paint 1 E 0 Side lights r 01 E 3 Wiring Z1 E] 0 Flasher [1 0 0 Shelter condition rf ] E Note: Calibration Instruments:

Next Cal Due AF = As Found Psychrometer-SIN-S/ -be I D- ZO I AL = As Left Digital multimeter-SIN -.9 T98O2Z(,4'j 1 0-A,0)-= no change (AF=AL) Digital multimeter

-SIN -FS = Full Scale Technicians:

I Y.-5 Vi ____ ,. ,,,__,, Comments:

-)vJLe"t m 1-__. (,e. o _ .O ) oW\Signature:._________________________________

Muffay & Twete4 Inc..- 600 Fi ank Uwvh Dn Swui A -Palatne llUnab -6006732 (847) 963-9000 Exelori Contract !Rumber 45546!D7 7110 R-28 Page 4 of 6 System Response Check Date: &'L" , )Site: LaSalle System: Mlcrotel Low Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 20.0 *0.4 20.0 +/-0.4 20.0 +0.4 108 +/-2 108 +/-2 108 +/-2 6.80 -0.7 -6.00 *0.18 -6.00 +/-0.18 Response As Found 07 10')Response ' __' __ jqq (0)07 As Left -.-Response ..Mid Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Expected 60.0 *0.4 60.0 +/-0.4 60.0 +/-0.4 324+/-t2 324 +/-2 324 +/-2 64.40 +/-0.7 2.00 +/-0.18 2.00 +/-0.18 Response As Found 5q R e s p o n s e ... .v 5 .As Left -.--_ .. -Response F, ulScale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200T AT 375' AT Expected 80.0 *0.4 80.0 +/-0.4 80.0 +/-0.4 432 +/-2 432+/-2 432 *2 93.20+/-0.7 6.00 +/-0.18 6.00 *0.18-Response As Found Response __ ___ _ 32__ _ __ _ __ _ __ _ (g)As Left --Response MurTLL &~ Trcttrk Inr- -600 Phut Banik Dritv Suite A -Pallne, IMincis -.60067 V (847) 963-9000 Exelon Contract Number 45546!D8 7/lC R-2Z Page 5 of E System Response Check Date: Site: LaSalle System: Process Computer Low Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 108 +/-2 108+/-2 20.0 +/-0.4 20.0 +/-0.4 -4.00+/-0.18 20.0+/-0.4 108 +/-2 6.80 +/-0.7 -4.00+/-0.18 0.20 +/-0.01 Response .....As Found Response 6_ _ (M.-6 10 7."20. 1 .I A tilt As Left --- -Response .t Mid Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 324 +/-2 324 +/-2 60.0 +/-0.4 60.0 +/-0.4 8.00 +/-0.18 60.0 +/-0.4 324 +/-2 64.40 +/-0.7 8.00+/-0.18 0.60:+/-0.01 Response As Found Response 2,2 ' 32J, 9, , o,) 5"0p -I"Lt"L 7. O.. o'As Left ----.-Response Full Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 432 +/-2 432 t2 80.0+/-0.4 80.0+/-0.4 14.00+/-0.18 80.00.4 432:12 93.20+/-0.7 14.00.18 0.0+/-0.0 Response 4241 8.0 43 2 As Found Response L , 7"-,4J C 0.(L0 ) L53 "]3.. P4.O .>As Left _-. -- .Response __ __ _ _"-NSL 7~,6J11 Mwriya& Ta*td Inc. -600 Pirse Bank Drim, Siate A -Pataztn, Mlinis.& i6067 W (847) 963.9000 0 Exelon Contract Number 45546: DS 7/1C R-28 Page 6 of E System Response Check Date: C,--e,- I I Site: LaSalle System: Control Room Indicators Low Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 20.0 +1.0 20.0 t1.0 108 t5.4 108 +/-5.4 -4.00 +/-0.3 Response As Found Response 2. ( ,O _______As'Left -_Response Mid Scale Check '200' WS 375' WS 200' WD 375' WD 375' AT Expected 60.0 +/-1.0 60.0 +/-1.0 324 +/-5.4 324 +5.4 8.00 +/-0.3 Response 60.0 _ ___ _0.0 __34__2454___

As Found Response I "2-As Left Response Full Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 80.0 +1.0 80.0 +/-1.0 432 +/-5.4 432 +/-5.4 14.00 +/-0.3 Response ,, As Found Response 1q.0 As Left --- -Response _ _'__ _ ______, __,- __ _ret_________

A P _, _______.9 Mimay SP Tire~el, Inc. -600 Fint Bank Ddve, Sufte A.- Palatine, lflirnois

-60067 W (847) 963-9000 Exelon Contract Number 455465 D4 7/10 1 R-28 Page I of 6 LaSalle Meteorological Calibratior Date: 10 -!T- I+12.000V *0.12 A: + 12 0'B:+ X4 S POWER SUPPLIES 0ov -12.o0oV 120V V A:- 02. .L'%5.V V B:-iPL'Ot-V v a: -6L-1-v Signal conditioners and Digital Recorder: 0; 1n r'.Ueflifinno Vlf aIit~n (I f ,, UP=a :,,".;-, xyL"F " -'" ALF AL AL EOUIV 10 ft.PRCPLO ,0o0 V PRCP HI , !O V-ýý V.OC00 1L O0 V 1,V 00_ 35 f t WSZERO. 02.! V WS SPAN Z,'6 Z' V WDZERO*.OO_

V*SPAN, 3-'J V TSPAN g0Ob V WS ZERO. QV4 .V WS SPANz, 2-_ V WD ZEROL1O. V WD SPAN!'3 I'"" V ATZERO-,COoZ V AT, SPANLMVI AT 2 ZERO". _001 V&T 2 SPAN V WS ZERO, 0 Z < V WS SPAN -0"14 .V WD ZERO ,A oO V WD SPAN- v AT, ZEROQ. 0 0 .V AT, SPANSpm7 V.2 ZERO'. 0 _ V AT 2 SPAN2 5_-66 V-V ,4(l mph"" V 5 mph-V 3(00 0-VI'Z- .o a 200 f t.-V.'I- _ -_mph'0 V _____mph-V C ,D~v -(0.60 0 5, 06cp V -10,o PCoV

V-000o v 375 ft.-- V L.' ý"Omph 21S7D& V _5__ mph 1000o V 0 °-v IfOo°____V ______ao ,5",vo V 1o,Do o ,5 20D V Digital recorder AF AL L,.L"mph -mph0 mph k- mph 0 o 0 -ý a" aG o -- °o.ý mph -mph mph _ mph C>a -- 0_, -_mph -_ mph 0"bmph mph-0 E)'I I 0 -I Signal Cond.0.0O0Vt 0 .050V 5.OOOVk 0 .050V 0.025V j: 0.025V 2,500V1 0 .025V o.OoOV * .100V 3.333Vto.10.IO G0.OV +/- 0.050V 5.OOOVi 0 .050V 0.025V

0.025V 2.500V +/- 0.025V 0.o00Vt* .l00o/3.333V +/- 0.10OV 0.OOOV

0.05OV 5.00OOVk 0 .050V 0.00OV

0.050V 5.00OV

0.050V 0.025Vt 0 .025V 2.500V

0.025V 0.000vt

0.IOV 3.333V*+/-0.IOOV 0.0OOVk 0 .050V 5.OOOV +/- 0.050V 0.OOOV

0.050V 5.OOOV

0.050V Recorder AL EQUIV t 0.01" AL EQUIV* 0.01" AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV + 1 0 AL EQUIV + .1 0 F AL EQUIV + .1 0 F AL EQUIV + .1mph AL EQUIV + .lmph AL EQUIV + 10 AL EQUi + 10 AL EQUIV + .1 0 F AL EQUIV + .1 0 F AL EQUIV + .1mph AL. EQUIV+ .1mph AL EQUIV 1+AL EQUIV + 1 a AL EQUIV +.1 0 F AL EQUIV+ .1 0 F Specifications MwM & Treml, Inc. .600 Flat Bank Driw, A. Pak]dni Illinois

60067 3 (847) 471 It-4u-lI Exelon Contract Number 455465 LaSalle Meteorological Calibration D5 7/10 R-28 Page 2 of 6 Date: 10,-I TOWER MEASUREMENTS 0Ambient []Ice Bath 33 ft. Amb.AF AL Measured Recorded Difference Specification 1 3 OF+/-0.50F OF Temperatures 200 ft. drTf_.AF AL L-1 I OF -F I -(06 OF °F.O 5" F OF i0.18OF 375 ft, AT 1 1 AF AL.I "5 -__0 F F OF8 WS stall Forw. WD Revr. WD 33 ft.AF AL ,_.mph 0-Lmph Winds 200 ft.AF AL M)' 5'_mph _ mrnph V00 -10o,, 375 ff.AF AL Omph O. .mph 311 0 Ila Specification 0.5mph t 0.45mph 00/3600 +/- 5 180015400 50 Tracking/wear Comments:.33 , 1 " W~6 JA/ -,Q-rd WS Il AA-rc, q Pr9? d 18 P AXL-iI~Muwrny & Thtcl, Inc. -600 Rfut Bank Drfw, SufteA -Palazin Illinoi -60067 V (847) 963.9000 Exelon Contract Number 455465 D6 7/10 LaSalie Meteorological Calibration R-28 Page 3 of 6 Date: /c- -- / 'Dates of Last Wind Sensor Bearing Replacements:

33ft. 200 ft (6 mos.) WindSpeed:

0- ib.S .____-__-__

(12 mos.) Wind Direction:

/0_______

Jj-5 II __- _'- II 33 ft. 200 ft. 375 ft.Aspirators:

oy- o X ____Operation ofDe-Ice Heat Lamp System (Aug-Mar):

OK' OA to Ar , " (Operation of Rain Gauge: 01& Tips Poured CP Tips Recorded (0 UPS CHECK: OK Debris screen: L. Out Installed Removed Tower Lightino Good Fair Poor Tower Condition Good Fair Poor Beacon 0 r0 Paint Z O O Side lights Vi 0l 0 Wring V0 0 0 Flasher El 0 0 Shelter condition 1 0 0 Note: Calibration Instruments:

Next Cal Due AF = As Found Psychrometer-S/N-MIT 01 a..cr.zo( I AL = AsLeft Digitalmultimeter-S/N- .t-=. no change (AF=AL) Digital multimeter

-SIN -FS = Full Scale Technicians: , a/l,4 A , 'M, ii"/4e. _Comments: MunuM&T~wre*Inc..-

60W FirstBank Dwfw 1 sSwtA -Paladue, I~Nhwb -60067 2 (847) 963-9000 knl 11-4,ii Exelon Contract Number 45546r D7 7110 R-28 Page 4 of 6 System Response Check Date: ( & 5--//Site: LaSalle System: Microtel Low Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 20.0 t0.4 20.0 +/-0.4 20.0 +/-0.4 108+/-2 108 +/-2 108+/-t2 6.80 +/-0.7 -6.00 .0.18 -6.00 +/-0.18 Response As Found Response 20._ o _____ ______ , .-,.O -(,,0 As Left -- , -Response -Mid Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 60.0 10.4 60.0:+/-0.4 60.0 +/-0.4 324 +/-2 324 +/-2 324 *2 64.40 +/-0.7 2.00 +/-0.18 2.00 +/-0.18 Response As Found Response _____ D___ 32-Y 32.L __ __ 3Z-L~As Left --_ -Response _-_,_....Full Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 80.0 +/-0.4 80.0 +/-0.4 80.0+/-0.4 432+/-2 432 +/-2 432 +/-2 93.20 +/-0.7 6.00 +/-0.18 6.00 *0.18-Response As Found Response 7qq 7q.9 ______ 43 '13Z. Y3 9 0 _,___. _.__.As Left Response I A3L it-aa-ii Mwuiiy & Trael, Inc.

600 FIAt Bank DwA Suite A. PatimM

6006?' (847) 963-9000 Exelon Contract Number 45546!Di 711C R-2e Page 5 of e System Response Check Date: ( 6 -/ t Site: LaSalle System: Process Computer Low Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 108:2 108 +/-2 20.0 +/-0.4 20.0 -0.4 -4.00+/-0.18 20.0+/-0.4 108 +/-2 6.80 +/-0.7 -4.00*0.18 0.20 +/-0.01 Response As Found Response 106.0 .-20.0 2,-i -(PA 20,.. ,t AS Left " Response Mid Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Che 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 324 +/-2 324 +/-2 60.0 +/-0.4 60.0 -0.4 8.00 +/-0.18 60.0 +/-0.4 324?2 64.40 +0.7 8.00+0.18 0.60 +/-0.01 Response__

As Found Response 22.',) 3Z3.B S9.' (0.0 , (.oO 3,5--7 ..O-': As Left Response Full Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 432 t2 432 +/-2 80.0 +/-0.4 80.0+/-0.4 14.00+/-0.18 80.0 -0,4 432 t2 93.20+/-0.7 14.00+/-0.18 0.80 +/-0.01 Response As Found L O ~ ~ ~ q ~O i~q.L.1 Response '19-1 4 115. 9- -,Co 0,_7_1_As Left -- ---- --Response .....Muwrm & Tretkl, Inc.

600 Fiut Bank Die., SutA. Pa ainz, -60067 9 (847) 963-9000 Exelon Contract Number 45546.Ds 7/1C;R-28 Page 6 of e System Response Check Date: -Site: LaSalle System: Control Room Indicators Low Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 20.0 +/-1.0 20.0 +/-1.0 108 +5.4 108 +/-5.4 -4.00 *0.3 Response .. ..As Found Response 1/0 11) 0 4 L)As Left --Response Mid Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 60.0 +/-1.0 60.0 +/-1.0 324 +/-5.4 324 15.4 8.00 *0.3 Response , _.As Found Response (,O CO As Left .Response Full Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 80.0 +1.0 80.0 +1.0 432 t5.4 432.t5.4 14.000.3 Response As Found "3 Response 430___ _____ so_-__As Left -_- -Response ._.& Tuetl, Inc.

600 FAti Bank Dvivp Suite A. Pakwtw, Iflnais .60067 9 (847) 963.9000 RAI # MA-01 ATTACHMENT 3

Annual Report on the Meteorological Monitoring Program at the LaSalle County Nuclear Power Station 2012 prepared for Exelon Nuclear Warrenville, IL 60555 by Murray and Trettel, Incorporated 600 First Bank Drive, Suite A Palatine, IL 60067 (847) 963-9000 e-mail: mtOweathercommand .com ReviewedB 90ýDate:~~Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 I Table of Contents i I Section Description Paae* List of Tables ...................................................

ii 1 Introduction

.....................................................................................

I 2 Summary .........................................................................................

2* 3 Data Acquisition

..............................................................................

3 4 Data Analysis ...................................................................................

5 5 Results ..........................................................................................

10* Site Calibration logs ...................................................................

Appendix I I I I I I I Murray & Trecte4, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (8472 963-9000 iiList of Tables I Number Description Paae 1 Instrument Locations

.......................................................................

4 2 Data Loggers ..................................................................................

4 1 3 Wind Direction Classes ..................................................................

7 4 Wind Speed Classes .......................................................................

7 5 Atmospheric Stability Classes ........................................................

8 1 6 Data Recovery Summary 1.............................

7 Wind Rose, January-March 2012 .................................................

14 I 8 Wind Rose, April-June 2012 ........................................................

16 9 Wind Rose, July-September 2012 ..............................................

18 10 Wind Rose, October-December 2012 ...........................................

20 I 11 Wind Rose, January-December 2012 ..........................................

22 12 Precipitation Totals .......................................................................

24 13 Maximum Doses Resulting From Airborne Releases ..................

25 I Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 Introduction The purpose of the meteorological program being conducted at the LaSalle County Station site is to provide information sufficient to assess the local weather conditions and to determine the degree of atmospheric dispersion of airborne radioactive effluent from the station.The meteorological tower is 400 ft. high and is instrumented at three levels. Wind speed and direction are measured at 33 ft., 200 ft., and 375 ft. Ambient temperature is measured at 33 ft. Differential temperatures, referenced to 33 ft., are measured at 200 ft.and 375 ft. Precipitation is measured at approximately 10 ft.Joint frequency stability wind rose tables of wind direction, wind speed, and stability are routinely tabulated from hourly measurements.

The quarterly and annual tables are included in this report.Descriptions of the instruments and digital recorder are given in Section 3 (Data Acquisition) of this report. Data reduction and processing are described in Section 4 (Data Analysis).

The results given in Section 5 of this report include modeled maximum whole body doses, skin doses, organ doses based upon airborne releases, and site meteorology.

Murray & Trectel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 2. Summary The LaSalle Station meteorological monitoring program produced 78,907 hours0.0105 days 0.252 hours 0.0015 weeks 3.451135e-4 months of valid data out of a possible 79,056 parameter hours during 2012 (366 days x 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months s/day x 9 measured priority parameters), which represents an overall data recovery rate of 99.8%. Priority parameters are all parameters except precipitation.

The stability wind rose tables included in this report have been generated using the 375 ft. wind data with the 375-33 ft. differential temperature data.The maximum annual calculated cumulative doses resulting from airborne releases were as follows.LaSalle County Generating Station: gamma air dose beta air dose whole body dose skin dose organ (infant thyroid)4.970 x 10-3 mrad 1.780 x 10-3 mrad 1.857 x 10-2 mrem 5.090 x 10-3 mrem 1.356 x 10÷0 mrem I I Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 3. Data Acquisition M Wind speed and direction are measured with Climatronics F460 wind sensors. The wind speed sensors have a starting speed of 0.5 mph (0.22 mps), a range of 0 to 100 mph (0 to 44.7 mps), and a system accuracy of +/-1.0 mph at 100 mph (+/-0.45 mps at 44.7 mps). The wind direction sensors have a threshold speed of 0.5 mph (0.22 mps), a range of 0 to 5400, and a system accuracy of +/-50.Ambient and differential temperature are measured with the Climatronics 100093 system.Ambient temperature is measured within the range of -22 to 122 0 F (-30 to 50 0 C) with an accuracy of +/-0.5 0 F (+/-0.30C).

Differential temperature is measured within the range of-10 to 10F (-5.6 to 5.6 0 C) with an accuracy of +/-0.18 0 F (+/-0.10 0 C).I Precipitation is measured with a Climatronics 100097 tipping bucket rain gauge and is measured in increments of one one-hundredth of an inch with a system accuracy of +/-1%for rain rates of 1-3"/hr and +/-3% for rain rates of 3-6"/hr.Instrument types and locations are summarized in Table 1.The meteorological data are collected and stored by a Microtel 4.0 data acquisition system. The Microtel measures the analog voltages of the instruments and records the digital equivalent within the range of 0 to +5 volts. The Microtel has the capability of storing 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months of minute data and one week of hourly data. Data are obtained from the Microtel by a direct dial telephone hookup to an in-house computer system. Data are sampled every second.As a backup to the Microtel, data are also recorded with a Johnson Yokogawa Corp. digital recorder (JYC DA1 00 data acquisition unit and Contec IPC-PT/M300(PC)WOU PC). Data are sampled every 10 seconds.Data loggers are summarized in Table 2.I Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 Table I Instrument Locations Measurement Wind Speed Wind Direction Differential Temperature Wind Speed Wind Direction Differential Temperature Wind Speed Wind Direction Ambient Temperature Sensor Tyne Climatronics 100075 F460 Climatronics 100076 F460 Climatronics 100093 Climatronics 100075 F460 Climatronics 100076 F460 Climatronics 100093 Climatronics 100075 F460 Climatronics 100076 F460 Climatronics 100093 Climatronics 100097-1 Tipping Bucket Rain Gage Location Tower Tower Tower Tower Tower Tower Tower Tower Tower Elevation 375 ft.375 ft.375 ft.200 ft.200 ft.200 ft.33 ft.33ft.33 ft.Precipitation Meteorological shelter roof 10ft.Table 2 Data Lo-wers Sampling Measurement Lopper Type Frequency Winds, Temperatures, Microtel 4.0 data acquisition system 1 sec.and Precipitation Winds, Temperatures, Johnson Yokogawa Corp. Digital Recorder 10 sec.and Precipitation (JYC DA100 and Contec IPC-PT/M300(PC)WOU) digital recorder Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 4. Data Analysis The LaSalle Microtel is routinely interrogated to obtain hourly average data. The data are then stored in the meteorological data base and listings of the data are generated.

The data listings are examined by qualified personnel and any apparent problems are brought to the attention of the Project Manager or Meteorological Technician and the Instrument Maintenance staff.I Hourly values of wind speed, wind direction, ambient temperature, differential temperature, and precipitation are obtained through measurements taken at the site.The standard deviation of wind direction (sigma) is derived. The wind direction variation is described in terms of the standard deviation of the direction about the mean direction.

The Microtel computes an hourly value of wind sigma by taking the Root-Mean-Square I (RMS) of the four quarter-hour wind sigma values. The Microtel quarter-hour wind sigma values are calculated directly from the one second wind direction samples during the 15* minute period.IThe data base files are edited approximately once a week. Missing Microtel values are replaced with digital recorder values, when available.

Invalid data are deleted from the I data base.M I I I U I I Murray 6? Trettel, Inc. 600 First Bank Drive, Suit A Palaine, Illinois 60067 (847) 963.9000 When an hourly value is missing or invalid, the numeral 999 is entered into the computer data file in the appropriate location.

When the wind direction changes substantially relative to its short term fluctuations, the numeral 888 can be entered into the wind sigma location to indicate shifting winds. When the wind blows with velocities near the sensing threshold of the instrument, the numeral 777 can be entered into the wind direction, wind speed, and wind sigma locations to indicate light and variable winds.A professional meteorologist reviews the data, calibration findings, equipment maintenance reports, and other information and determines which data are valid. Only the valid data are retained in the data base.As a quality control measure, a monthly comparison is made of Microtel and digital recorder data. An investigation is made into the reasons for any significant differences between the sets of values.Joint frequency stability wind rose tables of hourly data measured at the site are generated.

These tables indicate the prevailing wind direction, wind speed, and stability classes measured during the period of observation as well as the joint frequencies of occurrence of the wind direction, wind speed, and stability classes. The values are also used as input to the atmospheric transport and diffusion models. Wind direction, wind speed, and stability classes are given in Tables 3, 4, and 5.Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 I I I I I I I a I I I i I I-7-Table 3 Wind Direction Classes IF IF IF IF IF IF IF IF IF IF IF IF IF IF IF IF 348.750 < WD <1-1.250 < WD <33.750 < WD <56.250 < WD <78.750 < WD <101.250 < WD <123.750 < WD <146.250 < WD <168.750 < WD <191.250 < WD <213.750 < WD <236.250 < WD <258.750 < WD <281.250 < WD <303.750 < WD <326.250 < WD <11.25°33.750 56.250 78.750 101.250 123.750 146.250 168.750 191.250 213.750 236.250 258.750 281.250 303.750 326.250 348.750 THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is THEN Class is N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Table 4 Wind Speed Classes IF 0.0 mph < WS < 0.5 mph THEN Class is IF 0.5 mph < WS < 3.5 mph THEN Class is IF 3.5 mph < WS < 7.5 mph THEN Class is IF 7.5 mph < WS < 12.5 mph THEN Class is IF 12.5 mph < WS < 18.5 mph THEN Class is IF 18.5 mph < WS < 24.5 mph THEN Class is IF 24.5 mph < WS THEN Class is 1 2 3 4 5 6 7 Murray & Tretrel, Inc. 600 First Bank Drive, Suite A Palatine, llinois 60067 (847) 963-9000 Table 5 Atmospheric Stability Classes Differential Temperature Interval fin 0 C11lOOm% (1)Differential Temperature Interval (in OF over the 200l-33ft.

rnanoe (2)Differential Temperature Interval (in OF over the 375-33ft.

range) (2)cra~Class tin OC/1 00m) (') 200-33ft noel (2).I I U I I I I Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable-1.9 <-1.7 <-1.5 <-0.5 <1.5 <4.0 <AT < -1.9 AT <-1.7 AT < -1.5 AT <-0.5 AT< 1.5 AT < 4.0 AT-1.8<-1.6<-1.4<-0.5 <1.3<3.6<AT <AT <AT <AT <AT <AT _S AT-1.8-1.6-1.4-0.5 1.3 3.6-3.6 <-3.2 <-2.9 <-1.0 <2.8 <7.5 <AT AT AT AT AT AT AT-3.6-3.2-2.9-1.0 2.8 7.5 from ANSIIANS 2.5"Il from ANSI/ANS 2.5 (2) ANSI/ANS 2.5 intervals scaled for instrument heights on the LaSalle meteorological tower Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963.9000 I The following two programs were used to calculate doses resulting from radioactive releases: 1. XOQDOQ: Computer Program for the Meteorological Evaluation of Routine Effluent Releases at Nuclear Power Stations (NUREG/CR-2919).

The program is based on the theory that material released to the atmosphere will be normally distributed (Gaussian) about the plume centerline.

A straight-line trajectory is assumed between the point of release and all receptors.

The program implements the assumptions outlined in Section C of NRC Regulatory Guide 1.111. In evaluating routine releases from nuclear power plants, it primarily is designed to calculate annual relative effluent concentrations, X/Q values and annual average relative deposition, D/Q values.Output from the XOQDOQ program is used as input to the GASPAR program.2. GASPAR I1: A Code System for Evaluation of Radiological Impacts Due to the Release of Radioactive Material to the Atmosphere During Normal Operation of Light Water Reactors (NUREG-0597).

GASPAR is a program written for the evaluation of radiological impacts due to the release of radioactive material to the atmosphere during normal operation of reactors.

The GASPAR code implements the radiological impact models of NRC Regulatory Guide 1.109, Revision 1, for atmospheric releases.

The program is used to estimate the maximum individual doses at selected locations in the vicinity of the plant.Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963.9000 5. Results 5.1 Instrument Maintenance The maintenance program followed during 2012 was composed of routinely scheduled visits, preventative maintenance procedures, and equipment repairs.Routine monthly visits were made to inspect the sensing and recording systems for proper operation.

In addition, routine maintenance and calibration checks of all tower-mounted and ground level equipment were performed every four months. A description of the calibration and field procedures is found in the Murray and Trettel, Inc. "P1009 Procedures Manual" (July 2010).In April, the annual tower inspection was performed.

In June, the digital recorder failed. A replacement unit was programmed and bench tested. It was installed in July. Also in June, the 33 ft. wind speed sensor was replaced due to low readings.In July, the bi-weekly generator test was causing the digital recorder to trip off. The recorder was plugged into a UPS to resolve the problem.In October, the 375 ft. wind speed sensor was replaced due to broken cups and low readings.In December, the digital recorder was unreachable by modem. The unit was found powered off. The unit was powered up to restore communication.

No other significant problems were encountered with the equipment, and at the end of the annual period, no problems were evident at the site.Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 5.2 Data Recovery The record of data recovery for the year is summarized in Table 6.Table 6 LaSalle Site Data Recovery Summary 2012 Recovered Recovered Lost Elevation Hours Percent Hours Percent Changed Measurement I I I il II I I I!I Wind Speed Wind Speed Wind Speed Wind Direction Wind Direction Wind Direction Ambient Temperature Differential Temperature Differential Temperature Precipitation 33 ft.200 ft.375 ft.33 ft..200 ft.375 ft.33 ft.200-33 ft.375-33 ft.10ft.8752 8772 8851 8772 8772 8772 8772 8772 8772 8722 99.6 99.9 99.6 99.9 99.9 99.9 99.9 99.9 99.9 99.3 32 12 33 12 12 12 12 12 12 62 0.3 0.1 0.3 0.6 0.4 0.2 0.1 0.3 0.9 0.9 AVERAGE*99.8* average of priority parameters (all except precipitation)

Valid Recovered Hours Percent Lost Hours 32 12 33 Lower Level Joint Frequency

%Middle Level Joint Frequency

%Upper Level Joint Frequency

%8752 8772 8751 99.6 99.9 99.6 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 5.3 Summary of Billings for Equipment Repairs, Replacement Parts, and Other Work not Included in Fixed-Cost Maintenance Agreement-2012 Description

-LaSalle Cost Januar Meteorological equipment maintenance

$ 155.20 Meteorological parts, materials, and contractor services 807.41 February Meteorological equipment maintenance 1,162.20 Meteorological parts, materials, and contractor services 681.63 Special Request 170.00 March Meteorological parts, materials, and contractor services 35.59 Meteorological parts, materials, and contractor services 194.04 May Meteorological equipment maintenance 139.80 June Meteorological equipment maintenance 1,529.30 Meteorological parts, materials, and contractor services 3,161.87 Ju/V Meteorological equipment maintenance 424.10 Meteorological parts, materials, and contractor services 4,003.07 Aumust-none- 0.00 September Special Request 297.50 October Meteorological equipment maintenance 360.00 Meteorological parts, materials, and contractor services 253.22 November Meteorological equipment maintenance (from 10/27/12) 1,870.70 Meteorological parts, materials, and contractor services 345.52 December Meteorological equipment maintenance 401.10 Annual Total:$ 15,992.25 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 5.4 Stability Wind Rose Data The quarterly and annual stability wind roses are given in Tables 7 through 11. Wind speed classes have been altered to reflect the sensor threshold.

For the year, winds measured at 375 ft. most frequently came from the South-Southwest (11.25%) and fell into the 12.6-18.5 mph wind speed class (31.01%).

Calms (wind speeds at or below the sensor threshold) were measured 0.01% of the time and speeds greater than 24.5 mph were measured 15.90% of the time.Stability based on the 375-33 ft. differential temperature most frequently fell into the neutral classification (48.40%).Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 7-14-LaSalle County Generating Statio 375 ft. Wind Speed and Direction January-March.

2012 375Ft-33Ft Oelta-T (F)Number of Observations

-2180 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

m CLASS N---------

STABILITY CLASSES ----------

EU MU SU N SS MS ES TOTAL EU KU C SU ,A N IL SS M MS ES EU 1 SU-N 3 SS ES 6MU 7 SS MS MU 8 SU 1 SS MS IE EU-N MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.37 0.00 0.05 0.00 NNE 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.28 0.18 0.05 0.00 NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.14 0.18 0.09 0.00 0.00 0.00 0.00 0.64 0.18 0.05 0.05 0.00 0.05 0.14 0.60 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.14 0.00 0.00 0.00 0.00 0.00 0.50 0.14 0.14 0.00 0.00 0.00 0.00 0.37 0.37 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.05 0.00 0.00 0.00 0.00 0.23 0.18 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.14 0.18 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.32 0.05 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.05 0.09 0.00 0.05 0.00 0.00 0.00 0.00 0.46 0.37 0.14 0.00 0.00 0.00 0.05 1.06 0.32 0.23 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.05 0.00 0.00 0.00 0.00 0.09 0.32 0.14 0.09 0.00 0.00 0.00 0.05 0.32 0.37 0.37 0.05 0.00 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.28 0.05 0.09 0.00 0.00 0.00 0.18 0.55 0.37 0.14 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.18 0.37 0.05 0.00 0.00 0.05 0.05 0.69 0.46 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.23 0.00 0.00 0.00 0.00 0.00 0.50 0.46 0.05 0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.41 0.18 0.00 0.00 0.00 0.00 0.00 1.15 0.46 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.09 0.09 0.09 0.00 0.00 0.00 0.00 0.00 0.60 0.18 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.23 0.50 0.14 0.00 0.00 0.00 0.00 0.23 3.12 2.02 0.64 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.23 0.50 0.14 0.00 0.92 0.00 0.23 3.12 2.02 0.64 0.00 6.01 0.00 0.00 0.14 1.01 0.32 0.18 0.00 0.00 0.00 0.00 0.78 0.18 0.05 0.00 0.00 0.09 0.00 0.78 0.32 0.05 0.00 0.00 0.05 0.00 0.73 0.09 0.00 0.00 0.05 0.05 0.05 0.87 0.23 0.09 0.00 0.00 0.00 0.18 1.38 0.28 0.00 0.00 0.00 0.00 0.00 0.55 0.37 0.05 0.00 0.00 0.00 0.14 0.41 0.55 0.05 0.00 0.00 0.00 0.00 0.14 0.14 0.05 0.00 0.00 0.00 0.00 0.32 0.18 0.09 0.00 0.00 0.00 0.18 1.28 0.32 0.14 0.14 0.05 0.05 0.18 0.46 9.31 4.72 1.65 0.18 0.05 0.05 0.32 1.15 16.24 5.00 2.25 0.23 0.18 0.46 9.31 4.72 1.65 0.18 16.56 0.00 0.00 0.00 0.50 0.46 0.37 0.05 0.00 0.00 0.00 0.60 0.18 0.05 0.00 0.00 0.00 0.09 0.78 0.28 0.50 0.00 0.00 0.00 0.05 1.38 0.09 0.18 0.00 0.00 0.05 0.14 1.79 0.64 0.37 0.00 0.05 0.09 0.09 1.83 0.46 0.05 0.00 0.00 0.09 0.09 1.15 0.55 0.18 0.00 0.00 0.00 0.00 1.61 0.05 0.00 0.00 0.32 1.15 16.24 5.00 2.25 0.23 25.23 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 I TABLE 7 continued-15-LaSalle County Generating Statio 375 ft. Wind Speed and Direction January-March.

2012 375Ft-33Ft Delta-T (F)I SPEED ----------------------------------

WIND DIRECTION CLASSES ------------------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W E EU I MU 9 SU 2 SS 4 M E ES EU TSU N ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.64 0.00 0.00 0.00 0.00 0.00 0.00 0.37 0.00 0.00 0.00 0.00 0.09 0.46 1.47 0.00 0.00 0.00 0.00 0.05 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.28 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0,14 0.09 0.00 0.00 0.00 0.00 0.18 0.28 0.14 0.00 0.00 0.00 0.00 0.46 0.50 0.05 0.00 0.00 0.00 0.00 0.50 0.50 0.09 0.00 0.00 0.00 0.00 0.41 0.46 0.32 0.41 0.00 0.00 0.00 0.41 1.47 0.32 0.14 0.00 0.00 0.00 1.24 0.92 0.55 0.14 0.00 0.00 0.09 0.92 1.88 0.60 0.09 0.00 0.00 0.05 0.64 0.64 0.46 0.09 0.00 0.00 0.09 1.33 2.66 0.96 0.23 0.00 0.00 0.00 0.78 0.78 0.09 0.00 0.00 0.00 0.09 0.78 1.01 0.28 0.00 0.00 0.00 0.00 0.55 0.87 0.05 0.00 0.00 0.05 0.05 0.28 0.46 0.37 0.37 0.00 0.00 0.05 0.92 0.96 0.37 0.00 0.00 0.00 0.00 1.15 1.83 0.18 0.00 WNW NW NNW TOTAL 0.05 0.00 0.00 0.05 0 0.09 0.00 0.00 0.18 0.00 0.09 0.05 0.73 2.29 1.01 0.37 11.15 1.51 0.83 0.00 7.89 1.50 0.09 0.00 2.57 1.00 0.00 0.00 0.64---------

STABILITY CLASSES ----------

EU MU SU N SS MS ES TOTAL 0.18 0.73 11.15 7.89 2.57 0.64 23.21 0.00 0.05 0.09 1.79 2.61 0.18 0.00 0.14 0.14 0.18 1.19 0.18 0.00 0.00 0.05 0.09 0.00 0.83 0.00 0.00 0.00 0.18 0.18 0.37 0.60 10.09 12.89 3.12 0.83 0.37 0.60 10.09 12.89 3.12 0.83 28.07 TOT 3.35 2.75 3.44 5.46 2.80 2.84 4.17 5.55 9.59 10.05 7.39 6.51 10.50 13.17 8.26 4.17 100.00 0.32 1.10 3.17 50.14 33.03 10.37 1.88 100.00 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.00 0.14 2.39 0.50 0.32 0.00 0.00 0.14 0.00 1.93 0.60 0.09 0.00 0.00 0.05 0.18 2.43 0.60 0.14 0.05 0.05 0.18 0.69 3.90 0.50 0.14 0.00 0.00 0.00 0.14 1.15 1.42 0.09 0.00 0.00 0.00 0.00 1.33 1.06 0.46 0.00 0.00 0.00 0.00 1.83 1.70 0.60 0.05 0.00 0.00 0.00 1.70 2.52 0.78 0.55 0.00 0.00 0.28 4.08 3.39 1.47 0.37 0.00 0.00 0.23 3.58 4.04 1.83 0.37 0.00 0.00 0.32 3.07 2.61 1.33 0.05 0.00 0.05 0.28 3.03 1.88 0.87 0.41 0.00 0.14 0.23 4.72 4.31 1.10 0.00 0.09 0.23 0.18 6.61 5.28 0.78 0.00 0.14 0.23 0.37 4.91 2.25 0.32 0.05 0.05 0.09 0.14 3.49 0.37 0.05 0.00 0.32 1.10 3.17 50.14 33.03 10.37 1.88-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable IWind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL-WIND SPEED CLASSES-I 0.00 0.05 0.41 1.65 1.01 0.00 0.23 0.00 0.09 0.50 1.24 0.87 0.05 0.00 0.00 0.09 0.41 0.92 0.96 0.69 0.37 0.00 0.05 0.05 1.33 1.83 2.02 0.18 0.00 0.00 0.23 0.96 1.15 0.46 0.00 0.00 0.00 0.28 0.78 0.83 0.37 0.60 0.00 0.05 0.18 0.46 1.38 1.01 1.10 0.00 0.09 0.37 0.32 0.83 1.61 2.34 0.00 0.05 0.46 0.60 2.06 2.84 3.58 0.00 0.05 0.18 0.96 1.70 1.88 5.28 0.00 0.14 0.64 1.15 1.65 1.65 2.16 0.00 0.09 0.41 1.28 1.70 1.47 1.56 0.00 0.09 0.60 1.38 2.98 2.29 3.17 0.00 0.00 0.41 1.01 2.57 4.45 4.72 0.00 0.05 0.60 1.70 2.06 2.02 1.83 0.00 0.05 0.28 0.83 1.65 0.41 0.96 0.00 0.92 6.01 16.56 25.23 23.21 28.07 CALM< 3.5 mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph I Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 8-16-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction April-June, 2012 375Ft-33Ft Delta-T (F)Number of Observations

-2182 Values are Percent Occurrence I SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W W1W N14 NNW TOTAL---------

STABILITY CLASSES ----------

EU MU SU N SS MS ES TOTAL EU MU C SU L SS Mms I ES u.SU 7 SS ES 8 SU N SS 2 MS IES EU MU SU N SS MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.46 0.09 0.00 0.00 0.00 0.00 0.00 0.55 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.09 0.00 0.00 0.00 0.00 0.46 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.05 0.00 0.00 0.00 0.00 0.32 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.00 0.05 0.00 0.00 0.00 0.00 0.87 0.46 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.23 0.09 0.00 0.00 0.00 0.00 0.00 0.82 0.18 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.14 0.18 0.00 0.00 0.00 0.05 0.32 0.23 0.14 0.00 0.00 0.00 0.00 0.69 0.55 0.64 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.18 0.05 0.00 0.00 0.00 0.00 0.00 0.23 0.32 0.09 0.00 0.00 0.00 0.00 0.60 0.41 1.10 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.32 0.05 0.14 0.09 0.00 0.00 0.27 0.50 0.41 0.32 0.69 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.09 0.09 0.00 0.00 0.00 0.00 0.82 0.23 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.37 0.18 0.00 0.00 0.00 0.00 0.05 0.50 0.14 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.32 0.00 0.00 0.00 0.00 0.00 0.00, 0.69 0.18 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.18 0.09 0.05 0.00 0.00 0.00 0.00 0.82 0.32 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.00 0.37 0.00 0.00 0.00 0.00 0.00 3.9-4 0.87 0.69 0.00 0.00 0.00 0.00 0.18 10.04 4.08 1.83 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.00 0.37 0.00 0.64 0.00 0.00 0.00 0.00 0.27 0.00 0.05 0.00 0.00 0.00 0.00 0.78 0.23 0.05 0.05 0.00 0.00 0.00 0.96 0.27 0.09 0.00 0.00 0.00 0.00 0.96 0.37 0.05 0.00 0.00 0.00 0.00 2.20 1.01 0.05 0.00 0.00 0.00 0.00 0.37 0.27 0.18 0.00 0.00 0.00 0.00 0.87 0.27 0.46 0.05 0.00 0.00 0.05 0.23 0.23 0.18 0.00 0.00 0.00 0.37 1.79 0.37 0.32 0.00 0.00 0.00 0.00 0.32 0.05 0.05 0.00 0.00 0.00 0.00 0.78 0.37 0.37 0.09 0.00 0.05 0.09 0.92 0.46 0.37 0.00 0.69 0.00 5.50 0.00 0.00 3.94 0.87 0.00 0.18 10.04 4.08 1.83 0.23 16.36 0.00 0.00 0.05 1.19 0.50 0.09 0.00 0.00 0.00 0.00 0.78 0.64 0.18 0.00 0.00 0.00 0.05 1.65 1.33 0.00 0.00 0.00 0.00 0.00 0.96 0.18 0.00 0.00 0.00 0.18 0.96 0.41 0.32 0.14 0.00 0.05 0.18 0.78 0.32 0.27 0.00 0.00 0.05 0.05 1.28 0.96 0.27 0.00 0.00 0.05 0.23 0.96 0.37 0.09 0.00 0.00 0.00 0.00 0.55 0.55 0.00 0.00 0.00 0.00 0.18 1.47 16.45 9.53 4.67 0.96 0.18 1.47 16.45 9.53 4.67 0.96 33.27 Murray & Trettel, Inc. 600 First Bank Drive, Suitw A Palatine, Illinois 60067 (847) 963-9000 TABLE 8 continued-17-LaSalle County Generating Statio 375 ft. Wind Speed and Direction April-June.

2012 375Ft-33Ft Delta-T (F)SPEED CLASS----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL I EU 1 MU 9 SU 2 SS 4 M rnES EU G MU T SU N ES 0.00 0.05 0.14 0.55 0.37 0.09 0.00 0.00 0.00 0.00 0.00 0.18 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.46 2.84 0.14 0.32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2.02 0.23 0.00 0.00 0.00 0.00 0.00 0.46 0.05 0.00 0.00 0.00 0.00 0.00 0.96 0.73 0.09 0.00 0.00 0.00 0.00 0.78 0.00 0.00 0.00 0.00 0.00 0.00 0.55 0.41 0.14 0.00 0.00 0.00 0.00 0.41 0.00 0.09 0.00 0.00 0.00 0.00 0.37 0.27 0.64 0.14 0.00 0.00 0.00 0.09 0.18 0.09 0.00 0.00 0.00 0.00 0.50 0.27 0.50 0.41 0.00 0.00 0.00 0.05 0.09 0.00 0.00 0.00 0.14 0.09 0.41 1.01 0.64 0.27 0.18 0.18 0.09 0.73 0.55 0.60 0.18 0.00 0.09 0.41 1.60 1.19 0.92 0.00 0.00 0.05 0.18 0.96 2.06 0.46 0.00 0.00 0.09 0.23 1.10 1.05 0.05 0.05 0,00 0.27 0.23 0.27 0.41 0.00 0.00 0.00 0.05 0.09 0.41 0.14 0.09 0.27 0.00 0.00.0.00 0.14 0.00 0.00 0.00 0.00 0.05 0.23 0.27 0.32 0.46 0.05 0.00 0.00 0.00 0.18 0.18 0.14 0.00 0.00 0.00 0.00 0.50 0.55 0.00 0.00 0.00 0.00 0.00 0.37 0.14 0.00 0.00 0.00 0.00 0.00 0.64 0.82 0.32 0.00 0.00 0.00 0.00 0.69 0.18 0.00 0.00 0.00 0.00 0.14 1.28 0.92 0.09 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.46 1.56 14.48 8.75 4.03 1.19 0.18 0.18 0.50 0.55 6.74 4.12 1.47 0.18 0.46 1.56 14.48 8.75 4.03 1.19 30.48 0.00 0.00 0.05 0.23 0.00 0.00 0.00 0.00 0.00 0.00 1.33 0.05 0.00 0.00 0.50 0.55 6.74 4.12 1.47 0.18 13.75 TOT 4.63 4.45 9.99 7.42 5.87 4.72 4.90 4.67 7.65 11.69 7.38 4.22 5.77 5.64 5.82 5.18 100.00 0.18 1.15 3.76 51.92 27.36 13.06 2.57 100.00 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.05 0.18 2.75 1.37 0.27 0.00 0.00 0.00 0.05 2.93 1.10 0.37 0.00 0.00 0.00 0.23 7.79 1.79 0.18 0.00 0.00 0.00 0.05 5.27 2.06 0.05 0.00 0.00 0.00 0.00 3.53 1.97 0.37 0.00 0.00 0.00 0.05 2.15 1.33 1.19 0.00 0.00 0.00 0.00 1.47 1.24 1.97 0.23 0.00 0.00 0.32 1.37 0.82 0.96 1.19 0.18 0.32 0.18 2.47 2.11 1.88 0.50 0.00 0.14 1.01 4.63 3.85 2.06 0.00 0.00 0.37 0.64 3.48 2.20 0.50 0.18 0.00 0.09 0.27 2.38 0.69 0.46 0.32 0.00 0.09 0.32 2.47 1.37 1.37 0.14 0.00 0.05 0.09 3.02 1.97 0.50 0.00 0.00 0.05 0.23 3.30 1.56 0.69 0.00 0.00 0.00 0.14 2.89 1.92 0.23 0.00 0.18 1.15 3.76 51.92 27.36 13.06 2.57-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL-WIND SPEED CLASSES-0.00 0.00 0.55 0.78 1.83 1.19 0.27 0.00 0.14 0.50 1.33 1.60 0.60 0.27 0.00 0.18 0.41 1.37 3.25 3,39 1.37 0.00 0.00 0.32 1.33 3.02 2.25 0.50 0.00 0.05 0.32 1.05 1.88 1.79 0.78 0.00 0.05 0.46 0.73 1.88 1.10 0.50 0,00 0.00 0.05 0.00 0.23 0.00 0.64 0.64 2.20 2.20 1.42 1.70 0.37 0.14 0.00 0.00 0.09 0.82 1.65 2.57 2.52 0.00 0.00 0.23 0.69 2.84 4.22 3.71 0.00 0.05 0.46 1.10 2.02 2.57 1.19 0.00 0.00 0.32 1.10 1.60 1.05 0.14 0.00 0.00 0.41 1.60 1.88 1.37 0.50 0.00 0.00 0.55 0.92 2.61 1.05 0.50 0.00 0.09 0.32 1.05 1.70 1.79 0.87 0.00 0.05 0.32 1.19 1.10 2.43 0.09 0.00 0.64 5.50 16.36 33.27 30.48 13.75 CALM< 3.5 mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph I I I Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 9-18-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction July-September, 2012 375Ft-33Ft Delta-T (F)Number of Observations

-2209 Values are Percent Occurrence SPEED CLASS----------------------------------

WIND DIRECTION CLASSES---------

STABILITY CLASSES ----------

N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU MU C SU LSS M MS ES EU EU 1 SU-N 13 SSM ES 7 SS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.45 0.23 0.09 0.00 0.00 0.00 0.00 0.86 0.54 0.05 0.00 0.00 0.00 0.05 i.90 0.81 0.27 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.05 0.00 0.00 0.00 0.00 0.27 0.23 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.59 0.23 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.77 0.00 0.23 0.00 0.00 0.00 0.00 0.41 0.50 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0,00 0,00 0,00 0,05 0,00 0,14 0,00 0,00 0.00 0,00 0,36 0.23 0.27 0.05 0.00 0.00 0.00 0.18 0.41 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.05 0.00 0.00 0.05 0.50 0.23 0.05 0.00 0.00 0.00 0.00 0.41 0.45 0.50 0.00 0.00 0.05 0.00 0.09 0.27 0.81 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.50 0.14 0.09 0.00 0.00 0.09 0.14 0.45 0.27 0.41 0.09 0.00 0.18 0.09 0,09 0.14 0.95 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.05 0.72 0.05 0.14 0.00 0.00 0.00 0.05 0.54 0.18 0.45 0.05 0.00 0.05 0.05 0.18 0.05 0.63 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.05 0.00 0.00 0.00 0.95 0.23 0.23 0.00 0.00 0.00 0.14 0.77 0.32 0.63 0.00 0.05 0.00 0.14 0.63 0.27 0.41 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.77 0.09 0.18 0.18 0.00 0,05 0.09 0.77 0.27 0.72 0.18 0.00 0.00 0.00 0.68 0.41 1.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.05 0.81 0.18 0.18 0.05 0.00 0.18 0.18 1.09 0.27 0.68 0.36 0.00 0.00 0.05 0.91 0.41 1.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.09 0.00 0.00 0.00 0.00 0.50 0.05 0.05 0.05 0.00 0.00 0.27 1.31 0.32 0.45 0.32 0.00 0.14 0.32 0.72 0.54 1.27 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.05 0.00 0.00 0.05 0.91 0.18 0.00 0.00 0.00 0.00 0.77 1.99 0.32 0.68 0.36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.05 0.00 0.00 0.00 0.00 0.32 0.23 0.14 0.05 0.00 0.00 0.00 1.09 0.45 0.50 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.14 0.00 0.00 0.00 0.00 0.32 0.50 0.14 0.00 0.00 0.05 0.00 1.13 0.36 0.41 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.05 0.0g 0.00 0.00 0.00 0.00 0.91 0.45 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.45 0.36 0.95 0.18 0.00 0.00 0.00 0.18 9.01 2.81 1.99 0.41 0.00 0.00 0.36 1.72 13.35 5.75 6.38 1.54 0.05 0.05 0.72 1.40 12.36 8.65 9.14 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.00 0.00 0.45 0.36 0.95 0.18 1.95 0.00 0.18 9.01 2.81 1.99, 0.41 14.40 I EU MU 8 SU 1 SS 2 MS I ES EU MU SU 1 SS ES 0.00 0.00 0.09 0.45 0.23 0.14 0.00 0.00 0.05 0.05 0.68 0.72 0.09 0.00 0.00 0.00 1.00 0.41 0.00 0.00 0.00 0.05 0.14 1.22 1.13 0.09 0.36 1.72 13.35 5.75 6.38 1.54 29.11 0.00 0.00 0.00!.00 0.91 0.00 0.00 0.00 0.00 0.23 0.86 0.41 0.00 0.09 0.23 0.81 0.63 0.72 0.00 0.09 0.09 0.77 0.36 0.81 0.00 0.05 0.09 1.40 0.86 0.32 0.00 0.00 0.14 1.04 0.27 0.27 0.72 1.40 12.36 8.65 9.14 0.00 0.00 0.00 0.00 0.00 0.00 0.32 0.36 0.36 0.00 0.50 0.41 0.41 0.27 0.05 0.00 2.67 2.67 34.99 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 9 continued-19-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction July-September, 2012 375Ft-33Ft Delta-T (F)SPEED ----------------------------------

CLASS N NNE NE ENE E ESE WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU KU SU N SS MS ES TOTAL I EU 1 MU 9 SU ,2 SS 4 M*ES EU TSU N ES 0.00 0.00 0.09 1.00 0.32 0.18 0.05 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0,09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.95 0.54 0.05 0.00 0.00 0.00 0.00 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.81 0.14 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.36 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.14 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.18 0.27 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.18 0.45 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.09 0.09 0.14 0.72 0.32 0.00 0.00 0.00 0.00 0.05 0.00 0.14 0.00 0.00 0.23 0.23 0.32 0.72 0.59 0.00 0.14 0.09 0.09 0.63 0.50 0.27 0.00 0.00 0.05 0.23 0.54 0.54 0.09 0.00 0.00 0.00 0.05 0.54 0.18 0.05 0.00 0.05 0.00 0.23 0.41 0.54 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.32 0.14 0.32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.09 0.09 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.41 0.18 0.05 0.00 0.00 0.00 0.00 0.27 0.00 0.00 0.00 0.00 0.00 0.00 0.91 0.41 0.09 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.09 0.63 5.66 3.94 4.03 1.58 0.00 0.00 0.14 0.09 0.81 1.31 0.72 0.45 0.09 0.63 5.66 3.94 4.03 1.58 15.93 0.14 0.09 0.81 1.31 0.72 0.45 3.53 TOT 7.02 3.40 6.79 5.02 4.03 3.98 4.53 4.35 6.79 9.33 9.23 8.15 9.05 5.79 6.88 5.57 99.95 0.05 1.31 4.03 41-65 22.82 23.27 6.84 99.95 Wind Direction by Stability U a N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL I I 0.00 0.00 0.14 4.30 1.95 0.59 0.05 0.00 0.05 0.14 1.54 1.22 0.41 0.05 0.00 0.05 0.18 4.03 2.31 0.23 0.00 0.00 0.00 0.00 3.08 1.54 0.36 0.05 0.00 0.00 0.00 1.00 1.86 1.13 0.05 0.00 0.05 0.05 1.09 1.09 1.67 0.05 0.00 0.27 0.23 1.09 0.72 1.77 0.45 0.00 0.05 0.14 1.49 0.36 1.45 0.86 0.05 0.00 0.36 2.44 1.04 2.04 0.86 0.00 0.18 0.41 2.54 1.72 3.26 1.22 0.00 0.18 0.32 3.12 1.95 2.63 1.04 0.00 0.18 0.59 2.81 1.40 2.40 0.77 0.00 0.09 1.04 4.07 1.27 1.77 0.81 0.00 0.14 0.18 2.26 1.22 1.54 0.45 0.00 0.09 0.14 3.53 1.95 1.04 0.14 0.00 0.00 0.14 3.26 1.22 0.95 0.00 0.05 1.31 4.03 41.65 22.82 23.27 6.84 I Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable-WIND SPEED CLASSES-CALM-3.5 mph 3.6 -7.5 ph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph M U I I 0.00 0.05 0.77 1.45 3.03 1.63 0.09 0.00 0.14 0.59 0.91 1.58 0.18 0.00 0.00 0.09 0.91 1.40 2.63 1.58 0.18 0.00 0.09 1.00 1.00 1.90 0.95 0.09 0.00 0.18 0.91 0.77 1.49 0.68 0.00 0.00 0.27 0.81 1.36 1.22 0.32 0.00 0.00 0.05 0.72 1.45 1.77 0.54 0.00 0.00 0.09 0.95 1.27 1.31 0.68 0.05 0.00 0.14 1.40 1.86 1.86 1.36 0.18 0.00 0.09 1.22 2.08 2.13 2.08 1.72 0.00 0.05 1.27 2.76 2.90 1.45 0.81 0.00 0.18 0.63 2.67 3.40 1.22 0.05 0.00 0.14 1.13 4.12 2.90 0.77 0.00 0.00 0.14 0.72 2.13 2.40 0.41 0.00 0.00 0.18 0.95 2.04 2.76 0.68 0.27 0.00 0.09 0.41 1.86 1.72 1.40 0.09 0.05 1.95 14.40 29.11 34.99 15.93 3.53 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 10-20-LaSalle County Generating Statio 375 ft. Wind Speed and Direction October-December.

2012 375Ft-33Ft Delta-T (F)Number of Observations

-2181 Values are Percent Occurrence SPEED ----------------------------------

CLASS N NNE NE ENE E ESE WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL I EU MU C SU M MS ES EU 1 5U-N 3 SS I -MS 8 SU1 liSS 2M5 ES AU EU.N 7SS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.00 0.00 0.00 0.00 0.41 0.05 0.09 0.00 0.00 0.00 0.00 1.15 0.46 0.09 0.00 0.00 0.00 0.00 1.47 0.73 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.28 0.09 0.05 0.00 0.00 0.00 0.00 1.28 0.28 0.09 0.00 0.00 0.00 0.05 1.33 1.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.87 0.41 0.00 0.00 0.00 0.00 0.05 0.69 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.00 0.00 0.05 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.60 0.32 0.00 0.09 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.92 0.28 0.55 0.41 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.00 0.00 0.00 0.00 0.09 0.05 0.05 0.09 0.00 0.00 0.00 0.50 0.23 0.14 0.00 0.00 0.00 0.00 0.09 0.14 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.18 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 1.01 0.09 0.28 0.41 0.09 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.46 0.55 0.28 0.37 0.32 0.92 0.09 0.64 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.32 0.05 0.14 0.00 0.00 0.00 0.00 0.73 0.14 0.23 0.18 0.00 0.00 0.00 1.10 1.05 0.73 0.78 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.05 0.00 0.00 0.00 0.32 0.14 0.00 0.00 0.00 0.00 0.00 0.41 0.28 0.41 0.18 0.00 0.00 0.05 1.42 0.64 0.60 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.05 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.28 0.28 0.14 0.05 0.05 0.05 0.14 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.69 0.83 0.64 0.37 0.60 0.14 0.32 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.28 0.14 0.83 0.87 0.23 0.05 0.32 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.46 0.14 0.00 0.00 0.00 0.00 0.00 1.19 0.28 0.09 0.00 0.00 0.00 0.00 1.19 0.69 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0,00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.28 0.46 0.09 0.28 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.19 1.38 0.55 0.46 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.56 2.34 0.87 0.60 0.23 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.55 0.09 0.05 0.00 0.00 0.00 0.00 1.19 0.09 0.00 0.00 0.00 0.00 0.00 1.24 0.14 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.32 0.14 0.18 0.09 0.00 0.00 0.00 0.00 4.26 1.28 0.64 0.28 0.00 0.00 0.00 0.00 13.48 4.63 2.43 0.92 0.00 0.00 0.00 0.14 15.04 9.67 3.48 2.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.32 0.14 0.18 0.09 0.73 0.00 0.00 4.26 1.28 0.64 0.28 6.46 0.00 0.00 13.48 4.63 2.43 0.92 21.46 0.00 0.14 15.04 9.67 3.48 2.15 30.49 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 10 continued-21-LaSalle County Generating Statio 375 ft. Wind Speed and Direction October-December.

2012 375Ft-33Ft Oelta-T (F)------------.-.-------

STABILITY CLASSES ----------

I SPEED CLASS----------------------------------

WIND DIRECTION CLASSES N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU 1 MU g SU 2 SS 4MS IES EU IG MU TSU N 2 SS 4 MS ES 0.00 0.00 0.00 0.64 1.05 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.46 0.28 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.55 0.23 0.00 0.00 0.00 0.00 0.00 0.32 0.05 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.14 0.00 0.00 0.00 0.00 0.09 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.14 0.14 0.00 0.00 0.00 0.14 0.23 0.00 0.00 0.00 0.00 0.00 0.14 0.60 0.41 0.09 0.00 0.00 0.00 0.28 0.00 0.14 0.00 0.00 0.00 0.00 0.37 1.15 0.78 0.41 0.00 0.00 0.00 0.96 2.06 0.37 0.23 0.00 0.00 0.05 0.87 1.47 0.60 0.18 0.00 0.00 0.05 1.88 2.52 1.05 0.55 0.00 0.00 0.05 0.69 0.83 0.87 0.05 0.00 0.00 0.05 0.50 0.60 0.37 0.05 0.00 0.00 0.00 0.41 0.55 0.05 0.00 0.00 0.00 0.00 0.18 0.37 0.05 0.00 0.00 0.00 0.00 0.96 0.46 0.00 0.00 0.00 0.00 0.00 0.46 0.32 0.00 0.00 0.00 0.00 0.05 1.51 1.19 0.18 0.00 0.00 0.00 0.00 1.70 0.55 0.00 0.00 0.00 0.00 0.00 1.24 0.60 0.46 0.05 0.00 0.00 0.00 1.05 0.05 0.09 0.05 0.00 0.00 0.00 0:41 0.41 0.00 0.00 0.00 0.00 0.00 0.69 0.23 0.00 0.00 0.00 0.00 0.00'0.14 8.62 9.12 3.62 0.92 0.00 0.00 0.00 0.09 8.25 7.15 2.06 0.87 0.00 0.14 8.62 9.12 3.62 0.92 22.42 0.00 0.09 8.25 7.15 2.06 0.87 I I I I I 18.43 TOT 6.33 5.18 2.89 2.38 2.61 2.02 2.84 5.82 11.78 13.98 8.53 4.81 6.28 10.13 9.22 5.18 100.00 0.00 0.00 0.37 49.98 32.00 12.43 5.23 100.00 Wind Direction by Stability 4 N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.00 0.00 3.71 2.38 0.23 0.00 0.00 0.00 0.05 3.35 1.65 0.14 0.00 0.00 0.00 0.05 1.74 1.10 0.00 0.00 0.00 0.00 0.00 1.74 0.55 0.09 0.00 0.00 0.00 0.00 1.56 0.78 0.28 0.00 0.00 0.00 0.00 0.87 0.50 0.55 0.09 0.00 0.00 0.00 0.92 0.83 0.87 0.23 0.00 0.00 0.00 2.20 1.28 1.56 0.78 0.00 0.00 0.00 3.48 4.45 2.25 1.60 0.00 0.00 0.14 4.91 5.14 2.66 1.15 0.00 0.00 0.09 2.43 3.03 2.11 0.87 0.00 0.00 0.00 1.88 2.20 0.37 0.37 0.00 0.00 0.00 4.31 1.88 0.09 0.00 0.00 0.00 0.05 6.24 3.30 0.55 0.00 0.00 0.00 0.00 6.51 1.97 0.60 0.14 0.00 0.00 4.13 0.96 0.09 0.00 0.00 0.00 0.37 49.98 32.00 12.43 5.23-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable Wind Direction by Wind Speed I I I I I N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.09 0.55 1.70 2.20 1.70 0.09 0.00 0.00 0.41 1.65 2.38 0.73 0.00 0.00 0.00 0.09 1.28 1.24 0.28 0.00 0.00 0.05 0.09 0.60 1.47 0.18 0.00 0.00 0.00 0.18 0.46 0.83 0.78 0.37 0.00 0.09 0.28 0.87 0.41 0.18 0.18 0.00 0.00 0.23 0.64 1.15 0.46 0.37 0.00 0.05 0.23 1.42 2.48 1.24 0.41 0.00 0.00 0.50 1.28 3.67 2.71 3.62 0.00 0.14 0.46 1.28 2.89 3.16 6.05 0.00 0.00 0.60 2.25 1.65 2.48 1.56 0.00 0.09 0.41 1.51 1.19 1.01 0.60 0.00 0.05 0.60 1.56 1.88 1.42 0.78 0.00 0.05 0.41 1.83 2.66 2.93 2.25 0.00 0.09 0.73 1.83 2.98 2.34 1.24 0.00 0.05 0.69 1.28 1.42 0.83 0.92 0.00 0.73 6.46 21.46 30.49 22.42 18.43-WIND SPEED CLASSES-CALM< 3.5 mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 11-22-LaSalle County Generating Statio 375 ft. Wind Speed and Direction January-December.

2012 375Ft-33Ft Delta-T (F)Number of Observations

= 8752 Values are Percent Occurrence SPEED-- -------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

U CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL I EU MU C SU A NS MMS ES I EU 1 SU-N 03 SS ES 7 SS EMS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.02 0.00 0.00 0.00 0.00 0.42 0.09 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.01 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.07 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.01 0.00 0.00 0.00 0.29 0.00 0.08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.05 0.00 0.00 0.00 0.00 0.17 0.14 0.09 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.07 0.01 0.00 0.00 0.01 0.22 0.14 0.07 0.02 0.00 0.00 0.01 0.43 0.26 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.00 0.00 0.00 0.00 0.25 0.06 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.03 0.00 0.00 0.00 0.00 0.01 0.26 0.07 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.01 0.01 0.00 0.00 0.00 0.42 0.08 0.11 0.00 0.00 0.00 0.03 0.55 0.23 0.29 0.05 0.00 0.00 0.*00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.02 0.01 0.00 0.00 0.01 0.31 0.06 0.10 0.05 0.00 0.01 0.03 0.47 0.29 0.37 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.01 0.00 0.00 0.00 0.00 0.03 0.42 0.14 0.10 0.05 0.00 0.05 0.06 0.73 0.38 0.42 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.02 0.05 0.00 0.00 0.00 0.00 0.33 0.03 0.06 0.02 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.02 0.01 0.01 0.01 0.00 0,00 0.01 0.47 0.18 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.01 0.00 0.00 0.00 0.00 0.29 0.18 0.05 0.01 0.00 0.00 0.01 0.82 0.40 0.22 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.06 0.01 0.00 0.00 0.00 0.38 0.24 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.01 0.01 0.00 0.00 0.00 0.02 0.27 0.08 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.01 0.00 0.32 0.25 0.41 0.07 0.00 0.00 0.00 0.10 5.10 1.75 0.99 0.17 0.01 0.01 0.14 0.59 11.55 4.80 3.09 0.72 0.00 0.00 0.00 0.00 0.01 0.00 0.01 0.01 0.00 0.32 0.25 0.41 0.07 1.06 0.00 0.00.0.00 0.32 0.14 0.03 0.01 I EU MU 8 SU 2 MS D ES EU SU N MS ES 0.00 0.00 0.03 0.89 0.39 0.08 0.00 0.00 0.00 0.02 1.34 0.56 0.10 0.00 0.00 0.02 0.02 0.87 0.27 0.09 0.00 0.00 0.02 0.02 0.88 0.62 0.07 0.00 0.00 0.00 0.00 0.27 0.13 0.06 0.00 0.00 0.00 0.00 0.87 0.34 0.02 0.01 0.00 0.02 0.08 1.18 0.71 0.03 0.00 0.99 0.17 8.11 0.00 0.10 5.10 1.75 0.01 0.01 0.01 0.69 0.30 0.05 0.00 0.00 0.00 0.06 1.23 0.77 0.00 0.00 0.00 0.00 0.00 0.47 0.26 0.08 0.00 0.00 0.00 0.03 0.41 0.70 0.19 0.00 0.00 0.02 0.03 0.26 0.22 0.24 0.02 0.00 0.00 0.02 0.50 0.16 0.18 0.05 0.00 0.01 0.08 0.46 0.25 0.48 0.42 0.00 0.00 0.11 0.87 0.32 0.19 0.15 0.00 0.05 0.14 0.75 0.46 0.45 0.14 0.00 0.01 0.21 1.17 0.35 0.32 0.11 0.00 0.05 0.11 1.18 0.61 0.37 0.10 0.00 0.01 0.00 1.09 0.37 0.16 0.03 0.00 0.00 0.00 0.88 0.26 0.15 0.00 0.00 0.00 0.03 1.11 0.25 0.08 0.00 0.14 0.59 11.55 4.80 3.09 0.72 20.90 0.00 0.01 0.00 0.31 0.33 0.43 0.00 0.00 0.05 0.02 0.41 0.32 0.69 0.14 0.01 0.00 0.08 0.97 0.48 0.43 0.33 0.00 0.00 0.11 1.23 0.43 0.55 0.06 0.00 0.00 0.08 0.73 0.48 0.53 0.24 0.01 0.06 0.06 1.36 0.66 0.34 0.07 0.00 0.05 0.10 1.46 0.59 0.16 0.01 0.02 0.02 0.31 1.04 15.01 8.22 4.90 1.51 0.31 1.04 15.01 8.22 4.90 1.51 31.01 Murray & Tretrel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 11 continued-23-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction January-December.

2012 375Ft-33Ft Delta-T (F)I SPEED CLASS----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU -MU SU N SS MS ES TOTAL I EU I MU 9 SU 2 SS 4 M IES EU TSU N ES 0.00 0.01 0.06 0.55 0.43 0.07 0.01 0.00 0.00 0.00 0.08 0.07 0.02 o.0o 0.00 0.00 0.00 0.26 0.10 0.02 0.00 0.00 0.00 0.01 0.06 0.00 0.00 0.00 0.00 0.00 0.08 1.14 0.25 0.01 0.00 0.00 0.00 0.00 0.47 0.01 0.00 0.00 0.00 0.02 0.11 1.12 0.09 0.00 0.00 0.00 0.01 0.00 0.17 0.01 0.00 0.00 0.00 0.00 0.00 0.47 0.40 0.06 0,00 0.00 0.00 0.00 0.27 0.01 0.00 0.00 0.00 0.00 0.00 0.21 0.17 0.11 0.00 0.00 0.00 0.00 0.17 0.09 0.06 0.00 0.00 0.00 0.00 0.22 0.29 0.27 0.08 0.00 0.00 0.00 0.18 0.23 0.05 0.00 0.00 0.00 0.00 0.26 0.34 0.35 0.34 0.00 0.00 0.00 0.18 0.39 0.13 0.03 0.00 0.03 0.05 0.53 0.80 0.67 0.29 0.05 0.05 0.05 0.65 1.13 0.39 0.16 0.00 0.02 0.18 0.83 0.90 0.67 0.22 0.00 0.05 0.10 1.06 1.97 0.74 0.26 0.00 0.02 0.08 0.70 0.80 0.39 0.05 0.00 0.07 0.09 0.40 0.64 0.21 0.02 0.00 0.02 0.02 0.40 0.49 0.18 0.07 0.00 0.01 0.01 0.15 0.22 0.10 0.09 0.00 0.01 0.07 0.62 0.47 0.29 0.01 0.00 0.00 0.00 0.45 0.58 0.08 0.00 0.01 0.03 0.03 1.10 0.83 0.18 0.01 0.00 0.01 0.02 0.96 0.82 0.05 0.00 0.00 0.00 0.03 0.82 0.61 0.23 0.01 0.03 0.03 0.05 0.80 0.10 0.02 0.01 0.00 0.00 0.05 0.74 0.43 0.05 0.00 0.01 0.02 0.00 0.40 0.08 0.00 0.00 0.01 0.01 0.18 0.77 9.96 7.42 3.56 1.09 0.09 0.09 0.25 0.33 6.46 6.35 1.84 0.58 0.18 0.77 9.96 7.42 3.56 1.09 22.99 0.25 0.33 6.46 6.35 1.84 0.58 15.90 TOT 5.34 3.94 5.78 5.07 3.83 3.39 4.11 5.10 8.95 11.25 8.14 5.93 7.91 8.67 7.54 5.03 99.99 0.14 0.89 2.83 48.40 28.78 14.81 4.14 99.99 Wind Direction by Stability 4 N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.01 0.11 3.29 1.55 0.35 0.01 0.00 0.05 0.06 2.43 1.14 0.25 0.01 0.00 0.02 0.16 4.00 1.45 0.14 0.01 0.01 0.05 0.18 3.50 1.17 0.16 0.01 0.00 0.00 0.03 1.81 1.51 0.47 0.01 0.00 0.01 0.02 1.36 0.99 0.97 0.03 0.00 0.07 0.06 1.33 1.12 1.30 0.24 0.00 0.01 0.11 1.69 1.25 1.19 0.85 0.06 0.08 0.21 3.12 2.74 1.91 0.83 0.00 0.08 0.45 3.91 3.68 2.46 0.69 0.00 0.14 0.34 3.03 2.45 1.65 0.54 0.00 0.08 0.29 2.53 1.54 1.03 0.47 0.00 0.08 0.40 3.90 2.21 1.09 0.24 0.02 0.10D 0.13 4.52 2.94 0.85 0.11 0.03 0.09 0.18 4.56 1.93 0.66 0.08 0.01 0.02 0.10 3.44 1.12 0.33 0.00 0.14 0.89 2.83 48.40 28.78 14.81 4.14-STABILITY CLASSES.Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable I Wind Direction by Wind Speed I I I I I N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.05 0.57 1.39 2.02 1.13 0.17 0.00 0.09 0.50 1.28 1.61 0.39 0.07 0.00 0.09 0.46 1.25 2.02 1.49 0.48 0.00 0.05 0.37 1.06 2.06 1.35 0.19 0.00 0.06 0.41 0.81 1.34 0.93 0.29 0.00 0.10 0.46 0.94 1.09 0.49 0.32 0.00 0.03 0.34 0.80 1.62 0.86 0.46 0.00 0.06 0.39 0.91 1.70 1.30 0.73 0.00 0.05 0.62 1.14 2.31 2.37 2.47 0.00 0.07 0.53 1.26 2.39 2.83 4.18 0.00 0.06 0.74 1.82 2.06 2.03 1.43 0.00 0.09 0.45 1.65 1.98 1.19 0.58 0.00 0.07 0.69 2.17 2.41 1.46 1.11 0.00 0.05 0.53 1.47 2.56 2.21 1.86 0.00 0.10 0.65 1.66 2.38 1.70 1.05 0.00 0.06 0.42 1.29 1.47 1.27 0.51 0.01 1.06 8.11 20.90 31.01 22.99 15.90-WIND SPEED CLASSES-CALM< 3.5mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 5.5 Precipitation Monthly totals and the maximum 24-hour and maximum 1-hour precipitation amounts are summarized below. The month with the most measured precipitation was May. The month with the least measured precipitation was January*.

The maximum 24-hour total was 1.76" (May) and the maximum 1-hour total was 1.56" (May).Table 12 Precipitation Totals (Inches) -2012 LaSalle Site Maximum Maximum Month Total 24-hour 1-hour January 0.37* 0.14* 0.12*February 0.87* 0.23* 0.10*March 1.83 0.79 0.52 April 1.15 0.34 0.14 May 5.92 1.76 1.56 June 2.23* 1.06* 0.51*July 0.58* 0.38* 0.15*August 4.14 1.49 1.04 September 2.88 1.26 0.54 October 3.72 0.94 0.61 November 0.86 0.72 0.23 December 0.75* 0.36* 0.12*TOTAL: 25.30*some data are missing -actual precipitation may be under-reported Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 5.6 Doses Resultinq from Airborne Releases The following are the maximum annual calculated cumulative offsite doses resulting from LaSalle County Station airborne releases.LaSalle County Generating Station: Dose gamma air (1)beta air (2)whole body (3)skin (4)organ (i) (infant-thyroid)

Maximum Value 4.970 x 103 mrad 1.780 x 10-3 mrad 1.857 x 10.2 mrem 5.090 x 10.3 mrem 1.356 x 10+0 mrem Sector Affected North-Northeast North-Northeast North-Northeast North-Northeast North-Northeast Compliance Status 10 CFR 50 Appendix I Yearly Objective% of Appendix I gamma air beta air whole body skin organ 10.0 20.0 5.0 15.0.15.0 mrad mrad mrem mrem mrem 0.05 0.01 0.37 0.03 9.04 (1)(23 131 (4)15)Gamma Air Dose -GASPAR II, NUREG-0597 Beta Air Dose -GASPAR II, NUREG-0597 Whole Body Dose -GASPAR II, NUREG-0597 Skin Dose -GASPAR II, NUREG-0597 Inhalation and Food Pathways Dose -GASPAR II, NUREG-0597 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 I I I APPENDIX I b I I I I I I I Murray &' Traw~l, Tnc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 Exelon Contract Number 455465 D4 7/10 R-28 Page 1 of 6 LaSalle Meteorological Calibratior I Date: 2--7-i 2-a- -11L POWER SUPPLIES+12.OOOV

0.120V -12.OOOV

0.120V A:_+ 2 ____V A:. 1Z7- S5 V 13:_+ 2-O049_V B:-UZ, 0'Y' V 1 Signal conditioners and Digital Recorder: Siginal Conditioner Voltage Out IP AL A IFO UIV AF AL AL EQUIV LCP LO , 000 V r CP HI 0 0 0 V I SZERO-.Z'2>

V SSPAN-L,5 05 V NVDZERO. bOZ V ISPAN' V I I-ItRO -0oo0 V r PAN 50 6 v VS ZERO , O Z V I SPAN Z .TOc) V IVD ZERO., 0 1_5 V SPAN 3.3 3 .V ZERO, -ce V SPAN. L/, q IqV ZERO, LOO0. V 7,SPANS 066OO V ZERO SPAN,2'Lt)

' "V ZERO, 00 (V VDSPAN 7" V IZERO -00 0 V T.SPANS, 0O'90 V)ZEROý- o-00t V SPAN-- -" [;o03 V 10 ft-VV 0.00-v/,a0O__, 35 ft.0,Z5 V 0 -mph Z,500 V n'- mph* V ? °"-- V 'so)-vZZ. Do o-- V 1U&Z.060 200 f t.-V D--_ mph-V , mph ,0o0 V 0 o--- V-l'O'ao o______ v l.ao°-- V-V 375 ft.___V 0.5 mph;x, 50_0 V --Z) mph-o V 0-V 1/b, O-D-V )0,00 ,000 V 5", V Digital recorder AF AL I- , -,,/, 40 ,, -, 0.5" mph .. mph' mph mph 0 -0 00 Ob mph : mph S~-2)- mph_ mph oa 0 3(00 0 a Ib.0c') 0 -I/, D 6 .-o.S -mph ._. mph , ) L mph_- mph o~ 0o0 *o O. '-mh- 0p_____ -p ~ p Siqnal Cond.0.000V f 0.050V 5.OOOV + 0.050V 0.025V:1 0.025V 2.50OV :! 0.025V 0.000V +/- 0.1OOV 3.333V : 0.1 OOV O.OOOV +/- 0.050V 5.OOOV +/- 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V 0.000V + 0.1OOV 3.333V +/- 0.1OOV 0.OOOV +/- 0.050V 5.OOOV +/- 0.050V 0.OO0V +/- 0.050V 5.OOOV +/- 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V 0.OOOV +/- 0.1OOV 3.333V +/- 0.1 OOV 0.000V +/- 0.050V 5.OOOV +/- 0.050V O.OOOV +/- 0.050V 5.OOOV +/- 0.050V Recorder AL EQUIV +/- 0.01" AL EQUIV +/- 0.01" AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV + .OF AL EQUIV +.1°F AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV +.OF AL EQUIV +O .IF AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 1V AL EQUIV + 10 AL EQUIV + .1°F AL EQUIV +.,F Specifications E A32,-.7,a-a I Murray & Trettel, Inc. .600 Firnt Bank Drive, Suite A .Palatine, llilnois .60067 2 (847) 963.9000 Exelon Contract Number 455465 LaSalle Meteorological Calibration D5 7/10 R-28-, "- 1 7 Page 2 of 6 Date: 2 -" -J, TOWER MEASUREMENTS 0 Ambient Ice Bath Temperatures 33 ft. Amb. 200 ft. AT 1_AF AL AF AL Z19-4 OF --_OF- 1107oF -OF_-97 G. OF OF -, (,I OF -oF S2 OF -- OF ,0 HOF -oF+/-0.5°F +/-0.18 0 F Measured Recorded Difference Specification 375 ft. ,T 1 AF AL ,501 OF -F-8F+0.18°F 33 ft.AF AL WS stall 0, T" mph 65 mph Forw. WD -0 Revr. WD i-..o -Winds 200 ft.AF AL__ __mph O. 'mph 36g 0 __-PC 375 ft.AF AL mph 49, & mph 1-)K Specification 0.5mph +/- 0.45mph 00/3600 +/- 50 1800/5400

+/- 50 Tracking/wear oI-e-Comments:

TXA)C.( o~ ZTh12.. CArt~. /~i4~l( ~,-9IZd U i~ ~ Q*A~LVs~I I Murray & Trettel, Inc.

600 First Bank Drive, Suite A. Palatir, Illinois .60067 2 (847) 963.9000 Exelon Contract Number 455465 D6 7/10 R-28 Page 3 of 6 LaSalle Meteorological Calibration Dates of Last Wind Sensor Bearing Replacements:

Date: , 2 2-A- tl.33 ft.(6 mos.) Wind Speed: (12 mos.) Wind Direction:

200 ft.10.5 11 375 ft.?-=f- r-L 33 ft. 200 ft. 375 ft.Aspirators:

OK 5 K.Operation of De-ice Heat Lamp System (Aug-Mar):

OiL- X a3, QAO L. ,q -L P ' 3:3'Operation of Rain Gauge: 0 Tips Poured _Tips Recorded -I UPS CHECK: 0 V-Debris screen: In n Installed Removed Tower Lighting Good Fair Poor Tower Condition Good Fair Poor* Beacon 0 0- 0 Paint El 0 0 1 Sidelights 0 0 0l!) Wiring 0 0I 0. 0 Flasher IZI 0 0 Shelter condition E0 0* Note: Calibration Instruments:

Next Cal Due AF = As Found Psychrometer-S/N -14 l / 1 L-6) Z I AL = As Left Digital multimeter-S/N -S0202(10 20/?-= no change (AF=AL) Digital multimeter

-S/N -FS = Full Scaletkkik(e I omments: -3 TT UJS YINLS-htIO i N- )(D~G ( oc4 J,'J S -t It6 1) ftvrFQo /3 I -1 j ýj cje- r 'J'-/3 er 0165 WS fZ--%.0 j e- 1' A1MTO0UO9W 0 SJA FE TO e L )r--,% 8 0 1Z--I-1-2z

LX)SIY~ST~IE(3 MT-6IO 1 Di~b.O ~ .7.I (T-D 0(q0 r~ , AýýSignature:_

$, 1-, 3 , Morray & Tremtt, Inc.

600 First Bank Drive, Suite A , Palatine, Illinois .60067 W (847) 963-9000

-D7 7110 R-28 System Response Check Page 4 of 6 Site: LaSalle Date: Z--" -'1 System: Microtel Low Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 20.0 +/-0.4 20.0 +/-0.4 20.0 +/-0.4 108+/-2 108 +/-2 108 +/-2 6.80 +/-0.7 -6.00 +/-0.18 -6.00 +/-0.18 Response______

As Found Response .9I L/, 9 _____. /0 0 /06 /6-7 (. 1 -6.o -(11, As Left -Response Mid Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 60.0 +/-0.4 60.0 +/-0.4 60.0 +/-0.4 324:+/-2 324 +/-2 324:+/-2 64.40 +/-0.7 2.00 +/-0.18 2.00 +/-0.18 Response 31onse _ _ _ S -. ~32z'- )2: .0. ZC s Left .-..Response Full Scale che 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 80.0 +/-0.4 80.0 +/-0.4 80.0 +/-0.4 432 +/-2 432 +/-2 432 +/-:2 93.20 +/-0.7 6.00 +/-0.18 6.00 +/-0.18 Response As Found q, Response _ _.q ,(-, .LIf 'F( 93,( (.. L,.O As Left .....Response Murray & Trettek 1,u, .600 Finec Bankc BDive, Suite A -Pca~aine, IWintis.-

6006 7 9 (84 7) 963.9000

" D8 7/10 R-28 System Response Check Page 5 of 6 Date: Z--7 -I ?-Site: LaSalle System: Process Computer Low Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 108 +/-2 108 +/-2 20.0 +/-0.4 20.0 +/-0.4 -4.00+/-0.18 20.0+/-0.4 108 +/-2 6.80 +/-0.7 -4.00+/-0.18 0.20 +/-0.01 Response As Found V .Response (O0.Z. ._O, 0 --3O 7. IO6.% ,.-.A s Left ---..Response I I I I I I I I I I Mid Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 324 +/-2 324 +/-2 60.0 +/-0.4 60.0 +/-0.4 8.00 +/-0.18 60.0 +/-0.4 324+/-t2 64.40 +/-0.7 8.00+/-0.18 0.60 +/-0.01 Response As Found 'oa.I "Z-(J O O (.0O Response 325'O ' 'L'As Left -----_ ---Response__

Full Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WO 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 432 +/-2 432 +/-2 80.0 +/-0.4 80.0+/-0.4 14.00+/-0.18 80.0 +/-0.4 432 +2 93.20+/-0.7 14.00+/-0.18 0.80 +/-0.01 Response As Found Response --9,2_ '0,. fq(,) ' 4{Z.I 0-f3.O V((o o.'sO As Left --Response A32- 3-13-1e.MuTray & Taztek, Inc.

600 Fint Bank Drivi, Suite A. Polatine, Mlnois -60067 9 (847) 963.9000 7/10 R-28 System Response Check Page 6 of 6 Site: LaSalle Date: System: Control Room Indicators Low Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 20.0 +/-1.0 20.0 +/-1.0 108 +/-5.4 108 +/-5.4 -4.00 +/-0.3 Response As Found Response 2.1 2 (io As Left Response Mid Scale Check '200' WS 375' WS 200' WD 375' WD 375' AT Expected 60.0 +/-1.0 60.0 +/-1.0 324 +/-5.4 324 +/-5.4 8.00 +/-0.3 Response , Found Wf s Left ..-- --Response Full Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 80.0 +/-1.0 80.0 +/-1.0 432 +/-5.4 432 +/-5.4 14.00 +/-0.3 Response As Found Response

______ ____. _ 4__As Left t-.Response Murray & Trte4 Inc. .600 Pinm Bar Dnd, Suiu A .Pa.lai- ln irs

60067 2 (847) 963.9000 Exelon Contract Number 455465 D4 7110 R-28 Page 1 of 6 LaSalle Meteorological Calibratior I Date: -S- { 2 i +12.OOOV +/- 0.11 A:+ i B:+_______O Signal conditioners and Digital Recorder: Signal Conditioner Voltaqe Out AF AL AL EQUIV POWER SUPPLIES 20V -12.OOOV*0O.120V-V A:- l-Z.0If -V-V B:- 17 10- V Digital recorder AF AL Specifications LCPLO.. b 67- V iCPHIS.-_-ZV ZER H- C. 7,5 V SSSPAN Z ':5b'? V WVD ZERO '000 V I)PAN 3.3'3'3-V I LERO -V 3PAN 5D°L V NSZERO. 07-(- V IS SPAN Z, 0 V 3 SPAN-'"5 V ZERO.' o 0 o,-V SPANq/, '55 V ZERO.OO -V fTT SPAN V I ZERO,O2_ V SPAN2-_b6 V ZERO,- 00 1 V VD SPAN3'33-5"_V I ZERO .6) V r, SPAN, 'iq ?, V)ZERO, oO_ V SPAN_. _ V!!10 ft.35 ft.VO .mphV mph-V t-V-Z~,v0o 200 f t.V O. mph-V V'951' mph.D06 V e)-V-V 375 f t.___V 0.- -0 mph Y _ VS'B, 0 mph z V c °,- V adOO-V j-5" mph__-_mphmph 0 -0 12 1. 0, mph-- mph M-0 mph mph 0 -0 O.a -f 0 0.8 -0 O. -mph -mph*mph " mph a -0 Sional Cond.0.000V

0.050V 5.000V* 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V 0.000V + 0.100V 3.333V +/- 0.1OOV 0.00OV +/- 0.050V 5.OOOV +/- 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V 0.000V +/- 0.100V 3.333V +/- 0.100V O.OOOV +/- 0.050V 5.OOOV +/- 0.050V 0.OOOV +/- 0.050V 5.OOOV +/- 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V 0.OOOV +/- 0.1OOV 3.333V +/- 0.1OOV O.OOOV +/- 0.050V 5.OOOV +/- 0.050V 0.OOOV +/- 0.050V 5.OOOV +/- 0.050V Recorder AL EQUIV 1 0.01" AL EQUIV +/- 0.01" AL EQUIV + .lmph ALEQUIV+ .lmph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV + ,O 0 F AL EQUIV + .1F AL EQUIV + .lmph AL EQUIV + .lmph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV + .1 0 F AL EQUIV +.1OF AL EQUIV + .1mph AL EQUIV + .lmph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV + .I°F AL EQUIV +A.F Nn -ý-t HI Murray & Trettel, Inc.

600 First Bank Drive, Suite A. Palatine, Illinois.

60067 2 (847) 963.9000 Exelon Contract Number 455465 LaSalle Meteorological Calibration D5 7/10 R-28 Page 2 of 6 I Date: t "-. I I TOWER MEASUREMENTS VI Ambient El Ice Bath Temperatures 33 ft. Amb. 200 ft. A T 1 AF AL AF AL (q3V 7 o-F O __F -- OF u-.OO OF -F- F OF ,3Z OF ___F 0QO°F _ OF+0.5 0 F i-0.18OF Measured Recorded Difference Specification 375 ft. ZTf AF AL Z OF r-- OF-Z.3'0OF OF.,8 O0F -OF+/-0.18 0 F 33 ft.AF AL WSstall 0. mph Q-5 mph Forw. WD 0 Revr.WD I 1 q 0 -Tracking/wear 0 Winds 200 ft.AF AL 0 ...mph ' .mph 3S-8 0 -o 1I7 ? °a-375 ft.AF AL O- ý mph .-Q- -.0mph MI --°.0 'A 0 Specification 0.5mph +/- 0.45mph 0013600 +/- 50 1800/5400

+/- 50 Otc.Comments:

2a w Z.o&' W5 "or 5 4,5 I I LAi &1- -_ ,- oC-,a MI 01(5 &-T /3 1 t?- -odl- r -) 0 I A5Z Murray & Trettel, Inc. 600 First Bankc Drive, Suite A. Palatine, Illinois 60067 ' (847) 963.9000 Exelon Contract Number 455465 D6 7/10 R-28 Page 3 of 6 LaSalle Meteorological Calibration Date: G'- -Dates of Last Wind Sensor Bearing Replacements:

(6 mos.) Wind Speed: (12 mos.) Wind Direction:

33 ft.! -./I 200 ft.(P-' L..It 375 ft.so-5.33 ft. 200 ft. 375 ft.Aspirators:

ON- O\L-Operation of De-ice Heat Lamp System (Aug-Mar):

_80 E Operation of Rain Gauge: 01-- Tips Poured 7 Tips Recorded _5 UPS CHECK: ____Debris screen: 61 ) Out Installed Removed Tower Lightina Good Fair Poor Tower Condition Good Fair Poor 3 Beacon 0 D E- Paint E E] El Side lights r7i D E I) Wiring D E Flasher I El D Shelter condition 0 D rl I Note: Calibration Instruments:

"," -Next Cal Due AF = As Found Psychrometer

-S/N -0.- 'Id AL = As Left Digital multimeter-S/N -__4-,__b__

a _cN_,)d_ _-= no change (AF=AL) Digitalwti;Wer-SIN-p0vr ol:3.FS = Full Scale technicians:

0/ta(. E N M/,ýE RAXX I omments: II I I I j£ 4 Signature:

I Munray & Trettel, Inc.

600 First Bank Suite A. Palatine, Illinois .60067 v (847) 963.9000 D7 7/1 0 R-28 System Response Check Page 4 of 6 Date: (- -z-Site: LaSalle System: Microtel Low Scale che 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected Response 20.0 +/-0.4 20.0 +/-0.4 20.0 +/-0.4 108+/-2 108 +/-2 108 +/-2 6.80 +/-0.7 -6.00 +/-0.18 -6.00 +/-0.18 As Found 2W.,0" Ja /0Y l.0 Response 20.0 2i9- O / .-As Left _ ..- -Response L Mid Sca 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 60.0 +/-0.4 60.0 +/-0.4 60.0 +/-0.4 324 +/-2 324 +/-2 324 +/-2 64.40 +/-0.7 2.00 +/-0.18 2.00 +/-0.18 Response _____ _____1 __________

__________

____ ____.q 511 S" _-, 3Z9i '-3z./ tZoy C. -,.As Left { r. -----Response L_Full Scale che 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 80.0 +/-0.4 80.0 +/-0.4 80.0 +/-0.4 432 +/-2 432 +/-2 432 +/-2 93.20 +/-0.7 6.00 +/-0.18 6.00 +/-0.18 Response As Found Response _)As Left ....Response Muiay & Tierrel, Inc. .600 Finr Bank Driw.. Suite A .PalatinE, lihmis .60067 9 (847) 963.9000 EM 1M 1M Eic-WK.AP NUMP 45ME D8 7110 R-28 System Response Check Page 5 of 6 Date: &. / -.,-Site: LaSalle System: Process Computer Low Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 108 +/-2 108 +/-2 20.0 +/-0.4 20.0 +/-0.4 -4.00+/-0.18 20.0+/-0.4 108 +/-2 6.80 +/-0.7 -4.00+/-0.18 0.20 +/-0.01 Response _.As Found Response 10.7 -.' 101.9 , 9.qq .20.03 -,O L. IDg, S LG's -LJ', 7-,0 As Left Response _ I _ I _ I- I F 1 :_ _Mid Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 324 +/-2 324 +/-2 60.0 +/-0.4 60.0 +/-0.4 8.00 +/-0.18 60.0 +/-0.4 324 +/-2 64.40 +/-0.7 8.00+/-0.18 0.60 +/-0.01 Response As Found 3 Vq 37 .(7 Response 313- &__0 , ,.. -.1 5_______ _- _ 0_ L__.. -"_ ._5- _ -_ _o As Left --.... -Response I Full Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 432 +/-2 432 +/-2 80.0 +/-0.4 80.0+/-0.4 14.00+/-0.18 80.0 +/-0.4 432 +/-2 93.20+/-0.7 14.00+/-0.18 0.80 +/-0.01 Response As Found Response '-3j 1 31,'-,' 1- *5/ -.O ?q.9 .0 79,' 9,-*'/ /5.5Y3 1-As Left ----Response Murray & Trettu, Inc. .600 Firnt Bank Drine, Suite A .Palatine, Illinois .60067 2 (847) 963.9000

--. D9 7110 R-28 System Response Check Page 6 of 6 Site: LaSalle Date: -, System: Control Room Indicators Low Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected Response 20.0 +/-1.0 20.0 +/-1.0 108 +/-5.4 108 +/-5.4 -4.00 +/-0.3 As Found Response q- ./10 (10 -L -As Left Response .______Mid Scale Check 200' WS 375' WS 200' WO 375' WD 375' AT Expected 60.0 +/-1.0 60.0 +/-1.0 324 +/-5.4 324 +/-5.4 8.00 +/-0.3 Response -.._____ ______________

______A s Found Response __..Full Scale Check 200' WS 375' WS 200' WD 375' WD 375' ,T Expected Response 80.0 +/-1.0 80.0 +/-1.0 432 +/-5.4 432 +/-5.4 14.00 +/-0.3 As Found Response L'.".cJ As Left Response AY2- >ll-IX I Murnay & Trettel, Inc. -600 Fia Bank Drive, Suita A- Palatine, Iflinois.

60067 W (847) 963.9000 Exelon Contract Number 455465 D4 7110 R-28 Page 1 of 6 LaSalle Meteorological Calibratior Date: 1______0 1 " to _.POWER SUPPLIES+12.OOOV

0.120V -12.OOOV +/- 0.120V A:.+ IZ, 0o3V A:- ) Z, 0L- V I B: + +1 , 6L Signal conditioners and Digital Recorder: Signal Conditioner Voltage Out AF AL AL EQUIV V B: -) 2' -61 V Digital recorder AF AL Specifications LcP LO V fCP HI 5", 001 V S ZERO- C 0 V S SPAN V ND ZERO, -..P_.LV 3 )SPAN 3 .333 V i t-ERO ,ODO V;PAN ý. 6003 V NS ZERO, 40.`2 V F SPAN Z, -jV NVDZERO_,0bL4 V SPAN 3 V ZERO , ot,-7 V SSPAN.2" V ZERO

V T, SPAN5",OG_

V I ZERO .037 V I SPAN 2.5"03 V ZERO,. _00Z V V(D SPAN 3,'33 V I ZERO, _,OV",SPAN Y, 9 V)ZERO 6o0 _ V SPAN!5, !t; .V 10 ft.,Qo~c:: V 0, Do!;,Lo V 0 35 ft.V LL.__mph 22V V5ZýIJ mph-V ;LI3 -__v 3', 0-:: -V- zzb 0-V/zz22 O 0 2 n O fl ft 0.66 ____if I,Zo(.b , -- of O. U mph -mph... .. mph mph 0 -0 Z?_. 03 o -121._ ° -K°,b:630 V-V-V V~d. V V,~i O.! mph.SZ. mph L/3 0 0 6. o6D0'" a~b OIL G mph -__mph:E- -,mph mph C-) 0 0 3G o -0 o -0 Signal Cond.0.OOOV + 0.050V 5.OOOV + 0.050V 0.025V t 0.025V 2.500V +/- 0.025V 0.000V i 0.100V 3.333V 1 0.1OOV O.OOOV +/--0.050V 5.OOOV i 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V 0.000V +/- 0.100V 3.333V+/- 0.100V 0.OOOV + 0.050V 5.000V + 0.050V 0.OOOV + 0.050V 5.000V +/- 0.050V 0.025V +/- 0.025V 2.500V +/- 0.025V 0.000V +/- 0.100V 3.333V +/- 0.1OOV 0.000V +/- 0.050V 5.OOOV +/- 0.050V O.OOOV +/- 0.050V 5.OOOV +/- 0.050V Recorder AL EQUIV + 0.01" AL EQUIV 0.01" AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV+ 10 AL EQUIV+ .1 0 F AL EQUIV +.1 0 F AL EQUIV + .lmph AL EQUIV + .lmph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV +.I°F AL EQUIV +.l°F AL EQUIV + .1mph AL EQUIV + .lmph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV+ .1OF AL EQUIV +.I°F 0 375 ft.0 o V O.( mph 0-L( mph _- mph 2,50b V .mph SZ. -mph -- mph"- V .Zi( 0 0 0"- V 0 0-5ý.o&L3 V I/o .-; oe> o T -- o 0,43c) V 5D, V 0 0 w I Murray & Trettel, Inc. .600 First Bank Drve, Suite A. Palatine, Illinois .60067 2 (847) 963.9000 LaSalle Meteorological Calibration Exelon Contract Number 455465 D5 7110 R-28 Page 2 of 6 Date: i O- I ?L TOWER MEASUREMENTS aAmbient E] Ice Bath Measured Recorded Difference Specification 33 ft. Amb.AF AL 5.O 0 F -OF'9 -.1 ' o._ F -OF ,ll0 OF -OF+/-0.5 0 F Temperatures 200 ft. A T,_AF AL'-).3'9-I OF -F.-J.3'oF --. .0 F-:5'1 F ___F 0--IT OF OF+/-0.1 80F 375 ft. AT" AF AL Z.5 t, 3 F --__ F-1TO1° -OF 1Z oF -F+/-0.18 0 F 33 ft.AF AL WS stall O. 5" mph O- 5 mph Forw. WD0 °Lo Revr. WD Vjji 0 119 Tracking/wear Winds 200 ft.AF AL O.5 mph ____mph 37& S-8 0 375 ft.AF AL D-_-mph OS-mph 356 -.-il 0 Jlc l Specification 0.5mph +/- 0.45mph 00/3600 +/- 50 1800/5400

+/- 50 Is Commentst LA W2eo41-0 U 3$17SAlG TO L,034I 9ke-ta r oE) ITOI U0 1i9,m6v-, mli-oe- wj3 ,ntu-1DiC N M, f Hd -1), Murray & Trettel, Inc.

600 Fir=s Bank Drive, Suite A. Palatine, Illinois .60067 2 (847) 963.9000 Exelon Contract Number 455465 D6 7/10 R-28 Page 3 of 6 LaSalle Meteorological Calibration Date: D Wn n B n p Dates of Last Wind Sensor Bearing Replacements:

33 ft.i10. ý-t'VU 200 ft.375 ft./0 .J'(. I-z (6 mos.) Wind Speed: (12 mos.) Wind Direction:

0. I,0 Z ., to- HItz 33ft. 200 ft. 375ft.I Aspirators:

0C e- .D"Ic Operation of De-ice Heat Lamp System (Aug-Mar):

or.- A I4 -k -T L,,-, "l', " t- , I Operation of Rain Gauge: 0 Tips Poured 5 -Tips Recorded 5 UPS CHECK: VY--Debris screen: (n Out Installed Removed Tower Lightingq Good Fair Poor Tower Condition Good Fair Poor I Beacon E 0 E0 Paint [ 00 Side lights E 0 E i--I) Wiring 2:J 01 0 Flasher 0 0 0 Shelter condition 21 0 0'U Note: Calibration Instruments:

Next Cal Due AF = As Found Psychrometer

-S/N -AL = As Left Digital multimeter

-S/N --= no change (AF=AL) Digital multimeter-S/N -FS = Full Scale technicians: -W,& " r'oa,,5 , 6(0iA {/A.AX I omments: 31 0 fAA 0 Signature:

&ý' 11'o'll Murray & Tretel, Inc. -600 First Bank Drive, Suite A .Palatine, Illinois.

60067 2 (847) 963-9000 I m D7 7/10 R-28 System Response Check Page 4 of 6 Date: [L" Site: LaSalle System: Microtel Low Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 20.0 +/-0.4 20.0 +/-0.4 20.0 +/-0.4 108 t2 108 +/-2 108 +/-2 6.80 +/-0.7 -6.00 +/-0.18 -6.00 +/-0.18 Response As Foundq R e s p o n s e l q .c k IR 1 9 .O I Q -j o " 0 , 7L , .,, .As Left _- -- Response I Mid Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT ,Check Expected 60.0 +/-0.4 60.0 +/-0.4 60.0 +/-0.4 324 +/-2 324 +/-2 324 +/-2 64.40 +/-0.7 2.00 +/-0.18 2.00 +/-0.18 As Left -----Response Full Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 80.0 +/-0.4 80.0 +/-0.4 80.0 +/-0.4 432 +/-2 432 +/-2 432 +/-2 93.20 +/-0.7 6.00 +/-0.18 6.00 +/-0.18 Response As Found Response '60.0 ,7.q -7q.1 L_(_ _ L(57- 43Z ' I t..-As Left -----Response Murray & Tirztt4 Inc. -600 First Baink Drive. Suite A.- PalatinE.

Ilwis -60067 2 (847) 963-9000 0-D8 7110 R-28 System Response Check Page 5 of 6 Date: 10 -% \ ,"7J Site: LaSalle System: Process Computer Low Scale A847 A848 A849 X, A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 108 +/-2 108 +/-2 20.0 +/-0.4 20.0 +/-0.4 -4.00+/-0.18 20.0+/-0.4 108:+/-2 6.80 +/-0.7 -4.00+/-0.18 0.20 +/-0.01 Response As Found Response 0-].i iO7 , .,0.0 .O. Z- LL.00 Lo.- .7 101.o i.%O --,to o0I, As Left O -...Response I Mid Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 324 +/-2 324 +/-2 60.0 +/-0.4 60.0 +/-0.4 8.00 +/-0.18 60.0 +/-0.4 324 +/-2 64.40 +/-0.7 8.00+/-0.18 0.60 +/-0.01 Response As Found Response 3 qi *-- -L SI 3 '-I & -Ct' "o, "L , , q t. 0 ,-5-(As Left Response _ __ ____. _ _......Full Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 432 &2 432 +/-2 80.0 +/-0.4 I 80.0+/-0.4 14.00+/-0.18 80.0 +/-0.4 432 +/-2 93.20+/-0.7 14.00+/-0.18 0.80 +/-0.01 Response As Found Response qk( , -c L V. "9. 6.,0.(0 L{"5(, j q3. O 13.94 '-7 0" As Left .. .. .q.-..Response _ I A '350'.v."E A1SI) .35Y me-r)- t?-,. ,fs'Cs Murray & Trettel, Inc. .600 First Bank Drive, Suite A .Patafine_

IlinUis .60067 i (847) 963.9000 Dg 7110 R-28 System Response Check Page 6 of 6 Date: (D --."2-Site: LaSalle System: Control Room Indicators Low Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 20.0 +/-1.0 20.0 +/-1.0 108 +/-5.4 108 +/-5.4 -4.00 +/-0.3 Response As Found Response ( O1-As Left -Response _ _ "-___-Mid Scale Check 200 WS 375' WS 200' WD 375' WD 375' AT Expected 60.0 +/-1.0 60.0 +/-1.0 324 +/-5.4 324 +/-5.4 8.00 +/-0.3 Response aiFound ponse (0 GJ too zo _0 -Response Full Scale Check 200' WS 375-WS 200' WD 375' WD 375' AT Expected 80.0 +/-1.0 80.0 +/-1.0 432 +/-5.4 432 +/-5.4 14.00 +/-0.3 Response As Found Response __- ___ __ _ __0 _ _ ___ __As Left ....Response Mf'fay & Trettel, Inc.

600 Firt Bank Drive, Suite A .Palatinre Hlinois -60067 9 (847) 963.9000 RAI # MA-01 ATTACHMENT 4

Annual Report on the Meteorological Monitoring Program at the LaSalle County Nuclear Power Station 2013 prepared for Exelon Nuclear Warrenville, IL 60555 by Murray and Trettel, Incorporated 600 First Bank Drive, Suite A Palatine, IL 60067 (847) 963-9000 e-mail: mtO.weathercommand.com For Exelon Use Onl RevieWed By : 6 Date_ 51-,14-Murray & Trettel, Inc. 6oo Pirst Banc Drive, SuiteA Paltine, IlinoLs 60067 (847)963-9000 Table of Contents Section Description Paae List of Tables .......................................................................................

ii I Introduction

........................................................................................

1 2 Sum m ary ...........................................................................................

2 3 Data Acquisition

..................................................................................

3 4 Data Analysis .....................................................................................

5 5 Results ..............................................................................................

10 Site Calibration logs ...................................................................

Appendix Murray & Trettel, Inc. 6oo irst Bank Drive, WuiteA Palatine, Illinois 6oo67 (847) 963-9ooo List of Tables Numbe Description Page-1 Instrument Locations

...................................

4 2 Data Loggers ...................................................................................

4 3 Wind Direction Classes ....................................................................

7 4 Wind Speed Classes .......................................................................

7 5 Atmospheric Stability Classes ..........................................................

8 6 Data Recovery Summary ...............................................................

11 7 Wind Rose, January-March 2013 ...................................................

14 8 Wind Rose, April-June 2013 ..........................................................

16 9 Wind Rose, July-September 2013 ..................................................

18 10 Wind Rose, October-December 2013 ...........................................

20 11 Wind Rose, January-December 2013 ...........................................

22 12 Precipitation Totals .........................................................................

24 13 Maximum Doses Resulting From Airborne Releases .....................

25 Murray &T'ettel, Inc. 6oo First Bank Drive, SuiteA PdOati&eRlfiNis 6oo67 (847)963-900o Introduction The purpose of the meteorological program being conducted at the LaSalle County Station site is to provide information sufficient to assess the local weather conditions and to determine the degree of atmospheric dispersion of airborne radioactive effluent from the station- .The meteorological tower is 400 ft. high and is instrumented at three levels. Wind speed and direction are measured at 33 ft., 200 ft., and 375 ft. Ambient temperature is measured at 33 ft. Differential temperatures, referenced to 33 ft., are measured at 200ft.and 375 ft. Precipitation is measured at approximately 10 ft.Joint frequency stability wind rose tables of wind direction, wind speed, and stability are routinely tabulated from hourly measurements.

The quarterly and annual tables are included in this report.Descriptions of the instruments and digital recorder are given in Section 3 (Data Acquisition) of this report. Data reduction and processing are described In Section 4 (Data Analysis).

The results given in Section 5 of this report include modeled maximum whole body doses, skin doses, organ doses based upon airborne releases, and site meteorology.

Murray & Trettel, Inc. 6oo First Bank Drive, S'iteA Palatine,1wlinois 60067 (847) 963-9ooo 2. Summary The LaSalle Station meteorological monitoring program produced 78,612 hours0.00708 days 0.17 hours 0.00101 weeks 2.32866e-4 months of valid data out of a possible 78,840 parameter hours during 2013 (365 days x 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months s/day x 9 measured priority parameters), which represents an overall data recovery rate of 99.7%. Priority parameters are-all parameters except precipitation;-

.. ....The stability wind rose tables included In this report have been generated using the 375 ft. wind data with the 375-33 ft. differential temperature data.The maximum annual calculated cumulative doses resulting from airborne releases were as follows.LaSalle County Generating Station: gamma air dose beta air dose whole body dose skin dose organ (infant thyroid)2.470 x 103 mrmd 6.960 x 10"4 mrad 1.696 x 10.2 mrem 2.420 x 10-3 mrem 1.462 x 100 mrem Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Iliois 6oo67 (847)963-9oo0 3. Data Acquisition Wind speed and direction are measured with Climatronics F460 wind sensors. The wind speed sensors have a starting speed of 0.5 mph (0.22 mps), a range of 0 to 100 mph (0 to 44.7 mps), and a system accuracy of +/-1.0 mph at 100 mph (+/-0.45 mps at 44.7 mps):- The wind direction sensors have a threshold speed of 0.5 mph (0.22-mps),-

a range of 0 to 5400, and a system accuracy of +/-50.Ambient and differential temperature are measured with the Climatronics 100093 system.Ambient temperature is measured within the range of -22 to 122 0 F (-30 to 50 0 C) with an accuracy of +/-0.5°F (+/-0.3°C).

Differential temperature is measured within the range of-10 to 10°F (-5.6 to 5.60C) with an accuracy of +/-0.18 0 F (+/--0.100C).

Precipitation is measured with a Climatronics 100097 tipping bucket rain gauge and is measured in increments of one one-hundredth of an inch with a system accuracy of +/-1%for rain rates of 1-3"Jhr and +/-3% for rain rates of 3-6"/hr.Instrument types and locations are summarized in Table 1.The meteorological data are collected and stored by a Microtel 4.0 data acquisition system. The Microtel measures the analog voltages of the instruments and records the digital equivalent within the range of 0 to +5 volts. The Microtel has the capability of storing 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months of minute data and one week of hourly data. Data are obtained from the Microtel by a direct dial telephone hookup to an in-house computer system. Data are sampled every second.As a backup to the Microtel, data are also recorded with a Johnson Yokogawa Corp. digital recorder (JYC DA100 data acquisition unit and Contec IPC-PT/M300(PC)WOU PC). Data are sampled every 10 seconds.Data loggers are summarized in Table 2.Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 6oo67 (847)963-9ooo Table I Instrument Locations Measurement Wind Speed- .......Wind Direction Differential Temperature Wind Speed Wind Direction Differential Temperature Wind Speed Wind Direction Ambient Temperature Sensor Tyne Climatronics.

100075-F460-

_ -_Climatronics 100076 F460 Climatronics 100093 Clfmatronics 100075 F460 Climatronics 100076 F460 Climatronics 100093 Climatronics 100075 F460 Climatronics 100076 F460 Climatronlcs 100093 Climatronics 100097-1 Tipping Bucket Rain Gage Location..Tower.-Tower Tower Tower Tower Tower Tower Tower Tower Elevation 375 ft.375 ft.375 ft.200 ft.200 ft.200 ft.33 ft.33 ft.33 ft.Precipitation Meteorological shelter roof 10ft.Table 2 Data Looaers Sampling Measurement Logaer Thoe Freauencv Winds, Temperatures, Microtel 4.0 data acquisition system 1 sec.and Precipitation Winds, Temperatures, Johnson Yokogawa Corp. Digital Recorder 10 sec.and Precipitation (JYC DAIOO and Contec IPC-PTIM300(PC)WOU) digital recorder Murray & 7)-ette4 Inc.6oo Bank Drive, SufteA Palatine Illinais 6oo67 (847)963-.9ooo 4. Data Analysis The LaSalle Microtel is routinely interrogated to obtain hourly average data. The data are then stored in the meteorological data base and listings of the data are generated.

The data listings are examined by qualified personnel and any apparent problems are brought-to the attention of the-Project-Manager-or Meteorological-Technician and the Instrument~

....Maintenance staff.Hourly values of wind speed, wind direction, ambient temperature, differential temperature, and precipitation are obtained through measurements taken at the site.The standard deviation of wind direction (sigma) is derived. The wind direction variation is described in terms of the standard deviation of the direction about the mean direction.

The Microtel computes an hourly value of wind sigma by taking the Root-Mean-Square (RMS) of the four quarter-hour wind sigma values. The Microtel quarter-hour wind sigma values are calculated directly from the one second wind direction samples during the 15 minute period.The data base files are edited approximately once a week. Missing Microtel values are replaced with digital recorder values, when available.

Invalid data are deleted from the data base.Murray & Inc. 600 Pirst Bank Drive, Suite A Palatine, flinoiz 6o067 (847) 963-9o00 When an hourly value is missing or invalid, the numeral 999 is entered into the computer data file in the appropriate location.

When the wind direction changes substantially relative to its short term fluctuations, the numeral 888 can be entered into the wind sigma location to indicate shifting winds. When the wind blows with velocities near the sensing threshold of the instrument, the numeral 777 can be entered into the wind direction, wind-speed, and-wind-sigma-locations to-indicate light and varablewinds, -A professional meteorologist reviews the data, calibration findings, equipment maintenance reports, and other information and determines which data are valid. Only the valid data are retained in the data base.As a quality control measure, a monthly comparison is made of Microtel and digital recorder data. An investigation is made into the reasons for any significant differences between the sets of values.Joint frequency stability wind rose tables of hourly data measured at the site are generated.

These tables indicate the prevailing wind direction, wind speed, and stability classes measured during the period of observation as well as the joint frequencies of occurrence of the wind direction, wind speed, and stability classes. The values are also used as input to the atmospheric transport and diffusion models. Wind direction, wind speed, and stability classes are given in Tables 3, 4, and 5.Murray & Trettel, Inc. 6oo FirstBank Drive, SuiteA Palatine, Illinois 60o67 (847)963-90o0 Table 3 Wind Direction Classes IF IF IF IF IF IF IF IF IF IF IF IF IF IF IF IF 348.750 < WD <11.250 < WD <33.750 < WD <56;25k-- <- WD-- <-78.750 < WD <101.250 < WD <123.750 < WD <146.250 < WD <168.750 < WD <191.25° < WD <213.750 < WD <236.250 < WD <258.750 < WD <281.250 < WD <303.750 < WD <326.250 < WD <11.250 THEN Class is N 33.750 THEN Class is NNE 56.250 THEN Class is NE 78;750 -THEN- Class is-- ENE--101.250 THEN Class is E 123.750 THEN Class is ESE 146.250 THEN Class is SE 168.750 THEN Class is SSE 191.250 THEN Class is S 213.750 THEN Class Is SSW 236.250 THEN Class is SW 258.750 THEN Class is WSW 281.250 THEN Class is W 303.750 THEN Class is WNW 326.250 THEN Class is NW 348.750 THEN Class is NNW 0 Table 4 Wind Speed Classes IF 0.0 mph < WS 1 0.5 mph THEN Class is IF 0.5 mph < WS < 3.5 mph THEN Class is IF 3.5 mph < WS < 7.5 mph THEN Class is IF 7.5 mph < WS < 12.5 mph THEN Class is IF 12.5 mph < WS < 18.5 mph THEN Class is IF 18.5 mph < WS < 24.5 mph THEN Class is IF 24.5 mph < WS THEN Class is 1 2 3 4 5 6 7 0& T7ettel, Inc. 6oo FirstBank Driwu, ireA Palatine, lififi 6oo67 (847)963-9000 Table 5 Atmospheric Stability Classes Class Differentfal Differential Temperature

-Temperature Interval-

-- Interval-(In-F-over the-(in OCi100m) (1) 200-33ft.

ranae) (2)Differential Temperature

-Interval (irn-F over-the---.....

375-33ft.

range) (2)Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable AT < -1.9-1.9 < AT <-1.7-1.7 < AT <-1.5-1.5 < AT <-0.5-0.5 < AT < 1.5 1.5 < AT _< 4.0 4.0 < AT AT <-1.8 < AT <-1.6< AT <-1.4 < AT <-0.5 < AT <1.3< AT<3.6< AT-1.8-1.6-1.4-0.5 1.3 3.6-3.6 <-3.2 <-2.9 <-1.0 <2.8 <7.5 <AT AT AT AT AT AT AT Ic-3.6-3.2-2.9-1.0 2.8 7.5 (1)M2)from ANSI/ANS 2.5 ANSI/ANS 2.5 intervals scaled for instrument heights on the LaSalle meteorological tower Murray & Trettel, rnc. 6oo First Bank DTie, Suite A Palatine, Illnois 60o67 (847)963-9ooo The following two programs were used to calculate doses resulting from radioactive releases: 1. XOQDOQ: Computer Program for the Meteorological Evaluation of Routine Effluent Releases at Nuclear Power Stations (NUREG/CR-2919).

The program is based on the theory that material released to the atmosphere will be normally distributed (Gaussian) about the plume centedine.

A straight-line trajectory is. assumed. between--the point of release and all receptors.

The program implements the assumptions outlined in Section C of NRC Regulatory Guide 1.111. In evaluating routine releases from nuclear power plants, it primarily is designed to calculate annual relative effluent concentrations, X/Q values and annual average relative deposition, DiQ values.Output from the XOQDOQ program Is used as input to the GASPAR program.2. GASPAR I1: A Code System for Evaluation of Radiological Impacts Due to the Release of Radioactive Material to the Atmosphere During Normal Operation of Light Water Reactors (NUREG-0597).

GASPAR is a program written for the evaluation of radiological impacts due to the release of radioactive material to the atmosphere during normal operation of reactors.

The GASPAR code implements the radiological impact models of NRC Regulatory Guide 1.109, Revision 1, for atmospheric releases.

The program is used to estimate the maximum individual doses at selected locations in the vicinity of the plant.Murray & Trettel, Inc. 6oo First Bank Drive, SuzteA Palatine, Illinois 6o067 (847)963-90oo

5. Results 5.1 Inatrument Maintenance The maintenance program followed during 2013 was composed of routinely scheduled visits, preventative maintenance procedures, and equipment repairs.Routine monthly visits were made-to inspect-the sensing-and recording systems for -proper operation.

In addition, routine maintenance and calibration checks of all tower-mounted and ground level equipment were performed every four months. A description of the calibration and field procedures is found in the Murray and Trettel, Inc. "P1009 Procedures Manual" (October 2013).In February, there was some 375 ft. wind speed data loss due to sensor icing.In March, the 375 ft. wind direction sensor was replaced due to bad readings.

This caused some data loss.In April, the modem for the Microtel was found to be damaged. The unit was replaced.In May, the annual tower inspection was performed.

In November, a damaged 375 ft. wind direction sensor was replaced.

Later in the month, damage to the 375 ft. temperature assembly was discovered.

A broken mounting bracket was replaced.In December, a rain gauge with a new heating system was installed due to heating issues with the previous gauge. Later in the month, questionable temperature readings were investigated.

They were verified to be correct.No other significant problems were encountered with the equipment, and at the end of the annual period, no problems were evident at the site.Murray & 7rettel, Inc. 6oo First Batk Driv, Suite A Palatine, Illinois 60067 (847) 963-.ooo 5.2 Data Recovery The record of data recovery for the year is summarized in Table 6.Table 6 LaSalle Site Data Recoverv Summary 2013 Recovered Elevation Hours Measurement Wind Speed Wind Speed Wind Speed Wind Direction Wind Direction Wind Direction Ambient Temperature Differential Temperature Differential Temperature Precipitation 33ft.200 ft.375 ft.33 ft.200 ft.375 ft.33 ft.200-33 ft.375-33 ft.10ft.8753 8747 8716 8742 8753 8642 8753 8753 8753 8633 Recovered Percent 99.9 99.9 99.5 99.8 99.9 98.7 99.9 99.9 99.9 98.6 Lost Hours 7 13 44 18 7 118.7 7 7 127 Percent Changed 0.1 0.1 0.5 0.7 0.4 1.6 0.0 0.2 0.6 1.6 AVERAGE*99.7"average of priority parameters (all except precipitation)

Valid Recovered Hours Percent Lower Level Joint Frequency

% 8742 99.8 Middle Level Joint Frequency

% 8747 99.9 Upper Level Joint Frequency

% 8605 98.2 Lost Hours 18 13 155 Murray & Trttel, Inc. 600 First Bank Drive, Suite A Palatime, lffinois 6o067 (847)963-90oo 5.3 Summary of Billings for Equipment Repairs, Replacement Parts, and Other Work not Included In Fixed-Cost Maintenance Agreement

-2013 Description

-LaSalle Cost Januarfy Meteorological parts, materials, and contractor services 22.18-. February.

.. .. ...Meteorological parts, materials, and contractor services .55.49 Marh Meteorological equipment maintenance 1,176.90 Meteorological parts, materials, and contractor services 359.21 Meteorological parts, materials, and contractor services 210.01 Microtel equipment maintenance 245.84 May Meteorological equipment maintenance 289.80 Meteorological parts, materials, and contractor services 33.14 June Meteorological equipment maintenance 210.00 Meteorological parts, materials, and contractor services 33.79 Special Requests 552.50 Special Requests 450.00 Aucust Special Requests 85.00 September-none- 0.00 October Meteorological equipment maintenance 300.00 Meteorological parts, materials, and contractor services 437.91 November Meteorological equipment maintenance 2,901.14 Meteorological parts, materials, and contractor services 417.80 December Meteorological equipment maintenance 1.321.54 Meteorological parts, materials, and contractor services 494.40 Annual Total: $ 9,696.46 Murray & 7rettel, Inc. 6oo First Bank Driue, A Palatine, Iinois 6oo67 (847)963-9ooo 5.4 Stability Wind Rose Data The quarterly and annual stability wind roses are given in Tables 7 through 11. Wind speed classes have been altered to reflect the sensor threshold.

-For the year,.winds measured-at375.ft-most-frequentlycame from-the West-Northwst-(9.84%) and fell into the 12.6-18.5 mph wind speed class (32.72%).

Calms (wind speeds at or below the sensor threshold) were measured 0.06% of the time and speeds greater than 24.5 mph were measured 13.90% of the time.Stability based on the 375-33 ft. differential temperature most frequently fell into the neutral classification (53.51%).MurrMa & Trettel, Inc. 6oo .Rrst Bank Dve, t'teA Palatine, Illinoiw 60o67 (847)963.90oo TABLE 7-14-LaSalle County Generating Statlo 375 ft. Wind Speed and Olrectlfo January-March.

2013 375Ft-33Ft Delta-T (F)Nuiler of Observations

-2080 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ..........

CLASS N NNE NE ENE E ESE SE SSE S SSW SW SW W WNW NW NNW TOTAL EU MI SU N SS MS ES TOTAL EU 0.00 0.00 0.00 0.00 0.00 0.00 ,U- 0.0o-.0 0.00 0.6o.O.7-oo

.00 C SU A N LSS mMHS ES EU mU 1 SU-N 3 SS MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 O.00 0.00 0.00 0.00 0.10 0.00 0.Q0 0.00 0.00 0.00 0.00 0.00 a.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.10 0.00 0.00 0,00 0.00 0.00 0.19 0.19 0.00 0.00 0.00 0.00 0.00 0.0- 0:00- 0:00-0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0:00- 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0. 00- -0:00o-0.00 0.00 0.00 0.00 0.00 0.o0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0-00-0.00--0..00-

--. 0.00. .... .0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 EU 4 SU-N 7 SS HS ES 0.00 0.00 0.00 0.19 0.24 0.00 0.00 0.00 0.00 0.00 0.34 0.34 0.10 0.00 0.00 0.00 0.00 0.19 0.53 0.00 0.00 0.00 0.00 0.00 0.34 0.19 0.05 0.00 0.00 0.00 0.00 0.14 0.24 0.05 0.00 0.00 0.00 0.00 0.29 0.48 0.05 0.00 0.00 0.00 0.00 0.05 0.24 0.05 0.00 0.00 0.00 0.00 0.48 0.43 0.00 0.00 0.00 0.00 0.00 0.10 0.05 0.05 0.00 0.00 0.00 0.00 0.53 0.29 0.14 0.00 0.00 0.00 0.00 0.29 0.24 0.10 0.00 0.00 0.00 0.00 0.10 0.10 0.34 0.05 0.00 0.00 0,00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.24 0.24 0.05 0.00 0.00 0.00 0.00 0.38 0.14 0.05 0.05 0.00 0.00 0.00 0.05 0.00 0,00 0.00 0.00 0.00 0.00 0.29 0.10 0.05 0.00 0.00 0.00 0.00 0.34 0.24 0.00 0.00 0.00 0.00 0.00 0.24 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.29 0.24 0.00 0.00 0.00 0.00 0.00 0.58 0.19 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.24 0.14 0.00 0.00 0.00 0.00 0.00 0.43 0.10 0.14 0.00 0.00 0.00 0.05 0.05 0.05 0.00 0.00 0.00 0.00 0.24 0.34 0.00 0.00 0.00 0.00 0.00 0.34 0,19 0.24 0.00 0.00 0.00 0.00 1.20 0.53 0.43 0.05 0.00 0.00 0.00 0.38 0.00 0.00 0.00 0.00 0.00 0.24 0.10 0.05 0.05 0.00 0.00 0.00 0.82 0.29 0.29 0.00 0.00 0.00 0.00 1.30 0.48 0.10 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.43 0.24 0.00 0.00 0.00 0.00 0.00 1.44 0.38 0.05 0.00 0.00 0.00 0.00 3.61 1.44 0.24 0.00 0.00 0.00 0.10 0.00 0.00 0.05 0.00 0.00 0.00 0.50 0.24 0.00 0.00 0.00 0.00 O.0O 1.08 0.29 0.14 0.10 0.00 0.00 0.00 2.55 0.96 0.14 0.05 0.00 0.00 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.58 0.05 0.00 0.00 0.00 0.00 0.00 1.15 0.29 0.24 0.00 0.00 0.00 0.00 1.88 0.24 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.67 0.82 0.10 0.05 0.00 0.00 0.00 0.00 4.28 3.41 0.38 0.05 0.00 0.00 0.67 0.82 0.10 0.05 1.63 0.00 0.00 4.28 3.41 0.38 0.05 8.12 EU MU a SU-N 1SS 2MS ES EU 1HMU 3 SU 1SS 8mS ES 0.00 0.00 0.00 0.10 0.10 0.10 0.00 0.00 0.00 0.00 0.77 0.62 0.24 0.10 0.00 0.00 0.00 0.00 9.52 4.04 1.92 0.19 0.00 0.00 0.00 0.00 11.98 6.78 1.88 0.58 O.OD 0.00 9.52 4.04 1.92 0.19 15.67 0.00 0.00 0.00 2.45 0.10 0.05 0.00 0.00 0.00 0.00 0.29 0.14 0.00 0.00 0.00 0.00 0.00 0.43 0.05 0.00 0.00 0.00 0.00 0.00 0.58 0.19 0.00 0.00 0.00 0100 0.00 0.29 0.14 0.00 0.00 0.00 0.00 0.00 0.34 0.72 0.24 0.14 0.00 0.00 0.00 0.62 0.29 0.10 0.10 0.00 0.00 0.00 0.67 0.24 0.10 0.05 0.00 0,00 0.00 0.77 0.58 0.19 0.10 0.00 0.00 17.98 6.78 1.88 0.58 27.21 Mumay & Tijerte Inc. 600C int Bad Drive, Std-e A Pa.It.injinuis 60067 (847)963.9000 TABLE 7 continued LaSalle County Generating Statlo 375 ft. Wind Speed and Direction-15-January-March.

2013 375Ft-33Ft Delta-T (F)0 SPEED----------------------------------

WIND nIRECTIGN CLASSES ----------------------------------

STABILITY CLASSES ..........

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W M NW NNW TOTAL EU KU SU N SS PM ES TOTAL EU 9 Su-N_ .2SS.4 M ES EU G U TSU N 2 SS 4M45 ES 0.00 0.00 0.00 1.15 0.05.0.00 0.00 0.00 0.00 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.34 1.01 0.87 0.00- 0.05-0.19-0.00-0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.67 0.29-0.10 0.00 0.00 0.00 0.00 0.10 0.24 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.19 0.29 0.67- 1.20 0.10 0.14 0.00 0.00 0.00 0.00 0.05 0.19 0.24 0.00 0.00 0.00 0.00 0.00 0.00 0.38 0.48-0.58- 0-19-0.00 0.00 0.00 0.00 0.05 0.05 1.06 1.73 0: 67-1. 01-0.05 0.00 0.05 0.00 0.00 0.10 2.74 2.88 0.24- 0.24 0.00 0.05 0.05 0.00 0.05 0.00 0.14 1.39 15.53 0.34- 5.96 0.05 0.24 15.53 5.96 -1.39 0.10 0.14 0.43 0.05 0.24 0.10 0.00 0.00 1.39 0.00 0.00 0.05 0.14 0.00 0.00 0.00 0.00 0.19 0.19 23.41 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.77 0.05 0.00 0.00 0.00 0.00 0.00 0.72 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.48 0.10 0.00 0.00 0.00 0.00 0.00 1.06 0.24 0.00 0.00 0.00 0.00 0.05 1.20 0.34 0.00 0.00 0.00 0.00 1.15 2.26 0.05 0.00 0.00 0.00 0.00 0.43 1.54 0.29 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.67 1.49 1.11 1.68 0.29 0.10 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 3.41 0.72 2.12 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.72 0.00 0.00 0.00 0.00 0.00 0.05 0.00 10.58 11.78 1.39 0.05 0.05 0.00 10.58 11.78 1.39 0.05 233.5 99.95 TOT 5.10 2.02 2.26 4.09 3.41 4.13 4.09 5.24 3.56 7.02 6.15 7.74 10.38 16.63 11.11 6.97 99.95 0.05 0.10 0,24 58.61 32.79 7.07 1.11 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW '- SW WSW W WNW NW M4 TOTAL -STABILITY CLASSES.-0.00 0.00 0.00 4.23 0.72 0.14 0.00 0.00 0.00 0.00 1.11 0.87 0.05 0.00 0.00 0.00 0.00 1.35 0.82 0.10 0.00 0.00 0.00 0.00 2.93 1.11 0.05 0.00 0.00 0.00 0.00 2.64 0.53 0.24 0.00 0.00 0.00 0.00 1.59 1.59 0.77 0.19 0.00 0.00 0.00 1.30 2.16 0.53 0.10 0.00 0.00 0.00 1.59 2.93 0.58 0.14 0.00 0.00 0.05 1.15 1.83 0.53 0.00 0.00 0.00 0.00 3.08 3.61 0.29 0.05 0.00 0.00 0.00 2.36 2.55 1.06 0.19 0.00 0.00 0.05 3.56 2.88 1.06 0.19 0.00 0.05 0.00 0.05 0.05 0.00 5.58 11.68 3.94 4.47 0.77 0.38 0.05 0.00 0.00 0.05 0.10 8.70 1.78 0.29 0.19 0.00 0.00 0.00 5.72 1.01 0.24 0.00 0.05 0.10 0.24 58.61 32.79 7.07 1.11 Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extresely Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S 5SW S14 WW W WNW 1 NNWM TOTAL 0.00 0.00 0.43 0.77 2.60 1.20 0.10 0.00 0.10 0.72 0.58 0.43 0.14 0.05 0.00 0.00 0.43 0.82 0.48 0.38 0.14 0.00 0.05 0.34 0.91 0.77 1.20 0.82 0.00 0.24 0.19 0.96 0.43 0.87 0.72 0.00 0.10 0.62 0.58 1.44 1.06 0.34 0.00 0.10 0.38 0.29 1.73 0.96 0.62 0.00 0.05 0.53 0.62 1.11 1.63 1.30 0.00 0.05 0.43 0.58 0.34 0.58 1.59 0.00 0.10 0.53 0.77 1.06 1.11 3.46 0.00 0.00 0.38 0.67 1.63 1.15 2.31 0,00 0.14 0.58 0.77 2.21 1.97 2.07 0.00 0.38 0.43 1.39 1.87 3.03 3.27 0.00 0.10 0.67 1.88 5.29 3.17 5.53 0.00 0.14 0.82 2.40 3.70 3.22 0.82 0.00 0.10 0.62 1.68 2.12 1.73 0.72 0.05 1.63 8.12 15.67 27.21 23.41 23.85-WIND SPEED CLASSES-CALM< 3.5noh 3,6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 ipOl 18.6 -24.5 mph N 24.5 mph Mumay & Treze Inc. 600 Fft Bank Dri, Suire A 60067 (847)963-9000 TABLE 8-1.-LaSalle County Generating Static 375 ft. Wind Speed and Direction Apr11-June.

2013 375Ft-33Ft Oelta-T (F)Number of Observat1ons

-2185 Values are Percent Occurrence SPEED ----------------------------------

WINO DIRECTION CLASSES ----------------------------------

.........

STABILITY CLASSES ----------

CLASS N NHE HE ENE E ESE SE SSE S SSW SW WSW W WNW KW NN TOTAL EU K) SU N SS HS ES TOTAL EU 0.00 0.00 KU 0.00 0.00 C SU 0.00 0.00 A N 0.00 0.00 L SS 0.00 0.00 M MS 0.00 0.00 ES 0.00 0.00 EU MU 1 SU-N 3 SS ES EU 4 SU-N 7 SS MS ES EU MU 8 SU-N 1 SS 2 M ES EU 3 SU-N 1 SS 8MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.27 0.37 0.00 0.09 0.05 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.05 0.14 1.05 1.56 0.27 0.41 0.05 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.14 0.14 1.01 1.24 0.27 0.73 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.50 0.05 0.05 0,00 0.00 0.00 0.00 1.56 0.14 0.05 0.00 0.00 0.09 0.23 2.11 0.69 0.09 0.00 0.00 0.00.00 0 .0O 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.59 0.32 0.05 0.23 0.06 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.0o 0.00 0.78 0.82 0.27 0.32 0.18 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.96 0.64 0.55 0.82 0.05 0.14 0.00 0.00 0.00 b.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0. 27 0.05 0.00 0.00 0.00 0.00 0.05 0.87 0.41 0.14 0.00 0.00 0.00 0.09 0.69 0.50 0.46 0.00 0.00 0.00 0.06-0-.00o 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.37 0.18 0.00 0.00 0.00 0.00 0.05 0.41 0.09 0.23 0.00 0.00 0.00 0.23 0.78 0.41 0.46 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.32 0.00 0.00 0.00 0.00 0.00 0.54 0.09 0.14 0.05 0.00 0.00 0.00 0.82 0.27 0.37 0.14 0.00 0.00 0.00 0. (0 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.05 0.00 0.00 0.00 0.00 0.00 0.92 0.18 0.14 0.05 0.00 0.00 0.09 0.73 0.59 0.59 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 o.18 0.14 0.06 0.00 0.00 0.00 0.05 0.69 0.50 0.27 0.09 0.00 0.00 0.09 0.82 0.78 0.50 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.05 0.00 0.00 0.00 0.00 0.09 0.37 0.37 0.14 0.00 0.00 0.00 0.14 1.05 0.92 0.32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.18 0.05 0.00 0.00 0.00 0.00 0.64 0.18 0.05 0.00 0.00 0.00 0.05 1.24 0.55 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.o0 (.00 0.00 0.00 0.00 0.00 0.00 0.00 0.37 0.46 0.05 0.14 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 1.01 1.10 0.27 0.37 0.05 0.27 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.18 1.65 L.24 0.37 0.41 0.00 0.41 0.00 D.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.32 0.09 0.05 0.05 0.00 0.00 0.00 0.55 0.09 0.23 0.00 0.00.o00 0.00 1.19 0.87 0.05 0.00 0.00 0.00 0.00 0.09 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.00 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 4.94 0.05 1.69 0.00 0.37 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.05 0.46 0.59 13.55 0.14 4.12 0.00 1.97 0.00 0.23 0.10 0.00 0.00 0.00 0.14 0.00 1.46 1.37 17.53 0.14 8.88 0.05 3.66 0.00 0.32 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.00 D.00 0.00 0.00 0.00 0: o.00-a- o0--o0.0o-o.o-o.oo-0.00- 0.00- 0.00 0.00. -0.00 0.09 0.05 0.00 0.00 0.27 0.23 0.00 0.00 0.50 0.00 0.05 4.94 1.69 0.37 0.14 7.19 0.00 0.46 13.55 4.12 1.97 0.23 20.32 0.14 1.46 17.53 8.88 3.66 0.32 31.99 Murra & Treak Inc. 600 Fint Bank Drive, Suite A Patinllnoni 60067 (847)963.9000 TABLE 8 continued LaSalle County Generating Statlo 375 ft. Wind Speed and Direction-17-April-June.

2013 375Ft-33Ft Delta-T (F)SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNWTOTAL EU Mil SU N SS MS ES TOTAL EU 0.00 0.00 0.00 1 MU 0.00 0.00 0.05 9 SU.. 0.05 0.05 0.09.N 0.46 0.37 1.97_2. SS 0.37 _0.18- 0.09-4 16 0.09 0.05 0.09 ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.05 0.23 0.05 1.42 0.73 0.37 0.69 0.27 0.27.-1.10-0.41 _0.A41._0.18-0.00 0.27 0.18 0.32 0.46 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.14 1.01 0.82-0.32 0.06 0.00 0.00 0.05 1.56 1.51 0.14 0.09 0.00 0.00 0.05 0.05 0.50 0.05 1.42 1.42 0.96- 0.46.0.18 0.18 0.00 0.00 0.00 0.00 0.00 1.05 0.37-0.00 0.00 0.00 0.00 0.09 0.55 0.32 0.00 0.00 0.00 0.00 0.05 1.33 0.32 0.00 0.00 0.00 0.00 0.05 1.24 0.55 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.18 0.50 0.96 0.27-0.59-0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.23 0.00 1.56 0.37 14.32 0.14- 6.96-- --0.00 2.29 0.00 0.14 0.00 0.00 0.00 0.00 0.14 0.14 0.00 0.50 0.00 6.91 0.00 5.95 0.00 0.64 0.00 0.09 1.56 14.32 6.96 --. .-. .2.29 0.14 25.49 EU GNU T SU N 2 SS 4MS ES 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.05 0.00 0.00 0.00 0.00 0.00 0.37 0.09 0.00 0.00 0.00 0.00 0.00 0.41 O.14 0.05 0.00 0.00 0.00 0.00 0.05 0.09 0.14 0.00 0.00 0.00 0.00 0.00 0.27 0.18 0.00 0.00 0.00 0.05 0.14 0.46 0.05 0.00 0.00 0,09 0.18 1.33 1.28 0.09 0.00 0.00 0.05 0.09 0.50 0.37 0.00 0.00 0.00 0.00 0.00 0.14 0.59 0.00 0.00 0.00 0.00 0.00 0.32 0.23 0.00 0.00 0.50 6.91 5.95 0.64 0.09 14.23 TOT 4.35 5.58 8.01 5.72 6.22 4.90 5.40 4.67 9.52 10.34 6.86 5.68 7.32 6.27 5.90 2.88 99.86 0.00 0.50 4.03 57.62 27.87 8.92 0.92 99.86 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSWE SW WSW W WNW NW NNW TOTAL 0.00 0.06 0.23 2.84 1.05 0.18 0.00 0.00 0,00 0.37 3.56 1.46 0.14 0.05 0.00 0.14 0.32 6.27 1.01 0.27 0.00 0.00 0.00 0.05 4.12 1.24 0.27 0.05 0.00 0.00 0.05 2.93 2.65 0.59 0.00 0.00 0.05 0.18 2.29 1.46 0.92 0.00 0.00 0.05 0.50 2.24 1.37 1.19 0.05 0.00 0.00 0.09 2.01 1.33 1.01 0.23 0.00 0.00 0.27 4.58 3.16 1.19 0.32 0.00 0.14 0.82 4.49 3.66 1.10 0.14 0.00 0.09 0.37 3.62 2.15 0.64 0.00 0.00 0.00 0.14 3.75 1.60 0.18 0.00 0.00 0.00 0.09 5.63 1.56 0.05 0.00 0.00 0.00 0.32 3.43 1.78 0.69 0.05 0.00 0.00 0.18 3.34 1.88 0.46 0.05 0.00 0.00 0.05 2.33 0.46 0.05 0.00 0.00 0.50 4.03 57.62 27.87 8.92 0.92-STABILITY CLASSES.Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable ExtrenEly Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WW NRW NNW TOTAL 0.00 0.14 0.32 1.42 1.46 0.96 0.05 0.00 0.05 0.55 2.11 2.20 0.64 0.14 0.00 0.00 0.59 1.74 3.20 2.29 0.18 0.00 0.00 0.00 0.00 0.05 0.05 0.69 1.28 1.60 1.69 0.46 0.64 1.19 1.65 2.11 0.59 0.32 1.46 1.74 1.05 0.27 0.00 0.00 0.55 0.78 1.88 1.74 0.46 0.00 0.00 0.46 0.92 1.60 1.01 0.69 0.00 0.09 0.32 1.28 2.15 2.33 3.34 0.00 0.05 0.37 1.60 2.24 3.11 2.97 0.00 0.00 0.32 0.96 2.43 2.15 1.01 0.00 0.05 0.46 0.87 1.92 1.42 0.96 0.00 0.05 0.41 1.33 2.01 1.69 1.83 0.00 0.00 0.64 1.74 2.24 0.92 0.73 0.00 0.00 0.50 0.87 2.11 1.88 0.55 0.00 0.00 0.05 0.78 1.56 0.50 0.00 0.14 0.50 7.19 20.32 31.99 25.49 14.23-WIND SPEED CLASSES-CALM< 3.5 mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph" Murmy & Treatl Inc. 600 Rfn Bank DNw, Palatfe. llnofs 60067 (847)963.9000 TABLE 9-A&-LaSalle County Generating Statlo 376 ft. Wind Speed and Direction July-September.

2013 375Ft-33Ft Delta-T (F)Number of Observations

-2209 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SE SSE S 5SW SW WSW W WNW NW NNW TOTAL EU KI SU N SS MS ES TOTAL EU HU C SU A N LSS K MS ES EU MU 1 SU-N 3 SS MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.45 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.77 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.54 0.18 0.14 0.00 0.00 0.00 0.05 1.13 0.68 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.81 0.27 0.18 0.00 0.00 0.00 0.05 0.59 0.86 0.18 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0,00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 O, 00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.00 0.00 0.00 0.00 0.72 0.36 0.05 0.00 0.00 0.00 0.00 0.54 0.59 0.50 0.05 0.00 0.00" 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00-0.00-M-.0" 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0. 00 0 0-.00 -0.00-. 0.00-.MU 4 SU-N 7SS MS ES 0.00 0.00 0.00 0,45 0.18 0.00 0.00 0.00 0,00 0.05 1.77 0.54 0.14 0.00 EU KU B SU-N 1 SS 2 M Es EU 3SU-N 1SS 8MS ES 0.00 0.00 0.05 1.36 0.14 0.14 0.00 0.00 0.00 0.00 0.68 0.91 0.05 0.00 0.00 0.00 0.09 1.27 0.32 0.18 0.00 0.00 0.00 0.05 0.86 0.86 0.09 0.00 0.00 0.00 0.00'0.63 0.09 0.05 0.00 0.00 0.00 0.05 1.58 0.50 0.36 0.00 0.00 0.00 0.00 0.50 0.77 0.59 0.00 0.00 0.00 0.00 0.09 0.23 0.05 0.00 0.00 0.00 0.00 0.32 0.05 0.09 0.00 0.00 0.00 0.00 0.95 0.45 0.36 0.23 0.00 0.00 0.00 0.05 0.14 0.00 0.00 0.00 0.00 0.00 0.50 0.00 0.23 0.00 0.00 0.00 0.05 0.81 0.50 0.32 0.00 0.00 0.00 0.09 0.45 0.45 0.63 0.00 0.00 0.00 0.05 0.05 0.05 0.00 0.00 0.00 0.05 0.59 0.14 0.23 0.00 0.00 0.09 0.63 1.27 0.36 0.54 0.14 0.00 0.09 0.05 0.54 0.68 1.22 0.18 0.00 0.00 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.05 0.68 0.14 0.05 0.05 0.00 0.05 0.59 1.13 0.59 0.63 0.00 0.00 0.09 0.27 1.72 1.72 1.54 0.54 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.23 0.00 0.00 0.00 0.14 0.86 0.09 0.09 0.00 0.00 0.00 0.23 1.22 0.59 0.23 0.05 0.00 0.09 0.23 1.31 1.00 0.36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.05 0.09 0.05.0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.50 0.59 0.09 0.27 0.09 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.09 1.00 0.45 0.32 0.45 0.09 0.18 0.00 0.00 0.00 0.00 0.00 0.09 0.09 0.09 0.63 0.45 0.63 0.63 0.18 0.41 0.18 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.09 0.05 0.05 0.00 0.00 0.00 0.QO 0.00 0.00 0.00 0.00 0.36 0.54 0.14 0.05 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.91 0.54 0.41 0.23 0.05 0.32 0.05 0.00 0.00 0.00 0.00 0.00 0.18 0.14 0.72 1.18 0.41 0.45 0.09 0.09 0.05 0.00 0.00 0.00 0.00 0.00 0.50 0.91 0.63 0.00 0.00 0.00 0.00 0.32 9.33 2.26 1.31 0.05 0.00 0.00 0.14 2.17 16.52 7.51 4.39 0.50 0.00 0.00 0.41 1.31 13.31 12.45 6.75 1.63 0.00 0.00 0.50 0.91 0.63 0.00 2.04 0.00 0.00 0.00 -0.00 _0.00 0.00 0.05 0.00 0.00 0.00 0.05 0.00 0.00 0.32 9.33-2.26 1.31 0.05 13.26 0.00 0.00 0.05 0.14 2.17 16.52 7.51 4.39 0.50 31.24 0.00 0.00 0.05 1.36 1.00 0.06 0.00 0.00 0.00 0.05 1.58 1.09 0.00 0.00 0.00 0.05 0.00 0.45 1.31 0.36 0.00 0.00 0.00 0.00 0.41 0.36 0.54 0.41 0.00 0.00 0.05 0.45 0.18 0.54 0.18 0.41 1.31 13.31 12.45 6.75 1.63 35.85 Murray 6 Terett, Inc. 600 Fnt Bank Drv Sufte A Palad'n, im bnois 60067 (847)963.9000 TABLE 9 continued LaSalle County Generating Statlo 375 ft. Wind Speed and Direction-19-July-Septerber.

2013 375Ft-33Ft Delta-4 (F)SPEED ---------CLASS N NNE--------------------

WIND DIRECTION CLASSES---------

STABILITY CLASSES ----------

NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU 9 SU-N 2 SS_4IH ES EU GJHU T SU N 2 SS 416 ES 0.00 0.00 0.00 0.09 0.27 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.OO 0.00 0.00 0.00 0.00 0.00 0.32 0.18 0.27 0.36 0.45-0.14 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.68 0.32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.41 0.09 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 O.00 0.05-0.36 0.14 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.00-0.05 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.05 0.05 0.23 0.23- 0o91-0.36 0.72 0.45 0.14 0.00 0.05 0.05 0.45 1.58 0.77 0.23 0.00 0.00 0.00 0.05 0.23 0.18 0.00 0.00 0.00 0.09 0.54 1-, 00-0.14 0.00 0.00 0.00 0.00 0.05 0.18 0.23 0.00 0.00 0.00 0.00 0.00 0.09 0.14 0.00 0.18 0.05 0.09 0.27 0.18 0-.36-0:18-0:45-0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.50 0.18-0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.32 0.32 0.45 3.17 6.97-3.17 1.22 0.45 3.17 6.97 3.17 1.22 15.30 0.00 0.00 0.00 0.14 0.05 0.00 0.00 0.00 0.00 0.00 0.09 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0,05 0.09 0.05 0.14 0.00 0.00 0.00 0.00 0.05 0.23 0.00 0.00 0.00 0.00 0.o0 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.05 0.50 0.81 0.77 0.00 0.09 0.05 0.50 0.81 0.77 0.00 2.22 99.95 TOT 4.26 5.57 6.25 6.16 6.34 5.79 5.34 4.44 5.34 9.37 13.49 8.96 5.02 4.71 4.30 4.57 99.95 0.00 0.95 4.30 43.37 30.92 17.02 3.40 Wind Direction by Stability N MNE NE ENE E ESE SE SSE S SSW SWWSW W WNW M NNWM TOTAL 0.00 0.00 0.05 2.67 1.36 0.18 0.00 0.00 0.00 0.14 3.35 1.81 0.27 0.00 0.00 0.00 0.09 3.35 2.44 0.36 0.00 0.00 0.00 0.09 3.26 2.40 0.41 0.00 0.00 0.05 0.05 2.72 2.72 0.81 0.00 0.00 0.00 0.05 2.72 1.49 1.45 0.09 0.00 0.00 0.00 1.67 1.40 1.67 0.59 0.00 0.00 0.05 1.81 0.91 1.09 0.59 0.00 0.05 0.14 1.66 1.31 1.54 0.45 0.00 0.27 0.81 2.76 2.17 2.90 0.45 0.00 0.18 0.95 4.07 4.30 3.17 0.81 0.00 0.09 0.68 4,03 2.85 1.27 0,05 0.00 0.00 0.36 2.26 1.77 0.45 0.18 0.00 0.18 0.36 1.77 1.58 0.72 0.09 0.00 0.14 0.27 2.17 1.40 0.23 0.09 0.00 0.00 0.23 2.85 1.00 0.50 0.00 0.00 0.95 4.30 43.37 30.92 17.02 3.40-STABILITY CLASSES-Extreely Unstable Moderately Unstable Slightly Unstable Neutra I Slightly Stable Moderately Stable Extrmely Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SWWSW W WNW NW NNW TOTAL 0.00 0.05 0.50 1.67 1.63 0.36 0.05 0.00 0.05 0.95 1.86 1.86 0.68 0.18 0.00 0.09 0.86 2.04 2.44 0.63 0.18 0.00 0.05 1.27 1.67 2.72 0.45 0.00 0.00 0.05 0.63 2.49 2.17 1.00 0.00 0.00 0.00 0.77 2.49 1.86 0.63 0,05 0.00 0.14 1.13 1.67 1.72 0.54 0.14 0.00 0.36 0.45 1.99 1.40 0.23 0.00 0.00 0.18 0.72 1.67 1.63 1.13 0.00 0.00 0.14 1.00 3.03 2.76 2.04 0.41 0.00 0.09 0.95 2.99 5.89 3.12 0.45 0.00 0.27 1.18 2.31 2.99 1.77 0.45 0.00 0.23 0.77 1.58 1.72 0.45 0.27 0.00 0.09 0.91 1.18 1.77 0.72 0.05 0.00 0.05 0.54 1.45 0.00 0.23 0.63 1.13 0.05 2.04 13.26 31.24-WIND SPEED CLASSES-CALM c 3.5 mph 3.6 -7.5 eph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 nph 1.45 1.86 35.85 0.81 0.72 15.30 0.00 0.50 2.22 0 Mumrzy & ToteaI, Inc. 600 Fim Bank Drhm Suite A Pal atzinIns 60067 (847)963.9000 TABLE 10-20-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction October-Oecember.

2013 375Ft-33Ft Delta-T (F)Nunter of Observations

-2136 Values are Percent Occurrence SPEED ----------------------------------

W IND DIRECTION CLASSES ----------------------------------

.........

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WS W WM N NNW TOTAL EU MU SU N SS HS ES TOTAL EU C SU A N L SS ES EU WI 1 SU-N 3 SS MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00-0.00- 0:00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0;00- 0.00.0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0:00- 0. 00-0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00-0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0-00-0.00-0 0.00-0.

0.0O- 0.0-0.GO-0..C-0.00- --0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.00 0.00 0.00 ELU 4 SU-N 7 SS MS ES 0.00 0.00 0.00 0.28 0.05 0.00 0.00 0.00 0.00 0.00 0.28 0.33 0.14 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.00 0.00 0.00 0.00 0.28 0.19 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.51 0.19 0.19 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.00 0.00 0.00 0.00 0.00 0.42 0.23 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.00 o.0o 0.00 0.00 0.00 0.80 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.100 0.00 0.00 0.00 0.00 0.00 0.23 0.09 0.00 0.00 0.00 0.00 0.00 0.66 0.14 0.09 0.05 0.00 0.00 0.00 0.47 0.56 0.19 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.47 0.33 0.05 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.o0 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.28 0.05 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.84 0.84 0.23 0.19 0.05 0.09 0.23 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.19 0,14 0.00 0.00 0.00 0.00 0.75 0.42 0.28 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.42 0.14 0.00 0.00 0.o0 0.00 0.10 0.56 0.33 0.28 0.19 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.00 0.00 0.00 0.00 0.51 0.00 0.O0 0.00 0.00 0.00 0.00 0.98 0.33 0.14 0.14 0.00 0.00 0.110 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.33 0.09 0.05 0.00 0.00 0.00 0.00 0.80 0.23 0.19 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.00 0.05 0.00 0.00 0.00 0.00 1.22 0.56 0.19 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.05 0.75 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.00 0.05 0.00 0.00 0.00 0.00 0.00 3.18 0.94 0.33 0.00 0.00 0.00 0.00 0.05 10.72 4.40 1.92 1.08 0.00 0.00 0.23 0.00 0.05 0.00 0.28 0.00 0.00 0.00 0.00 0.00 0.00 .-....0.00 0.00 0.00 0.00 0.001 0.00 0.00 3.18 0.94 0.33 0.00 4.45 EU MU 8 SU-N 1 SS 2 HS ES EU I mU 3SU-N 1 SS 8 M ES 0.00 0.00 0.00 0.47 0.51 0.05 0.00 0.00 0.00 0.09 0.42 0.00 0.14 0.00 0.00 0.05 10.72 4.40 1.92 1.08 18.16 0.00 0.00 0.09 0.23 0.19 0.05 0.00 0.00 0.00 0.00 0.98 0.05 0.09 0.00 0.00 0.00 0.00 0.75 0.09 0.05 0.00 0.00 0.00 0.00 0.75 0.47 0.05 0.00 0.00 0.00 0.00 0.56 0.42 0.14 0.00 0.00 0.00 0.00 0.80 0.89 0.00 0.09 0.00 0.00 0.00 0.94 0.61 0.09 0.05 0.00 0.00 0.00 1.08 1.17 0.14 0.00 0.01 0.00 0.09 1.50 1.03 0.51 0.05 0.00 0.00 0.00 2.20 1.26 0.28 0.51 0.00 0.05 0.09 2.81 0.98 0.33 0.09 0.00 0.00 0.05 2.76 1.03 0.51 0.14 0.00 0.00 0.00 2.81 0.98 0.23 0.05 0.00 0.00 0.05 1.50 0.56 0.19 0.00 0.00 0.00 0.05 0.47 20.55 10.30 3.09 1.12 0.05 0.47 20.55 10.30 3.09 1.12 35.58& Irt. 600 Frst Bank Drive, SuimA Paladne, inos 60067 (847) 963.9000 TABLE 10 continued-21-LaSalle County Generating Statio 375 ft. Wind Speed and Direction Oktober.Decenber.

2013 375Ft-33Fl:

Oelta-T (F)SPEED ----------------------------------

WINO DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SE SSE 5 SSW SW WSW 14 LEG K NW NI TOTAL EU MU SU N SS KS ES TOTAL EU 0.00 I MU 0.00 9 SU 0.00-N 0.14-2-SS--0:

00-4l? 0.05 ES 0.00 0.00 0.00 0.00 0.14 0.00--0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.47 0.42 0:00-0.00-0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.42 0.14-0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00-.000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.33 0.23 0.89 0.09- 0.14--0.33-0.05 0.66 0.33 0.00 0.05 0.05 0.00 0.00 0.00 0.75 0.70 0.37 0.42 0.00 0.00 0.00 1.08 0.80 0.33 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.00 0.98 1.36 1.12 1.69--4.08-0,70-0.33 0.28 0.28 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.19 0.00 0.00 0.00 0.33 2.20 1.50 1.64 1.45 14.04 0.66-1.26-0775- 0,05- 7.58- --0.19 0.33 0.00 0.05 2.90 0.09 0.00 0.00 0.00 0.70 0.00 0.33 14.04 7.58 -2.90 0.70 25.56 EU G6MU TSU N 2S5 4MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0.05 0.00-0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.37 0.14 0.09 0.00 0.00 0.00 0.19 0.47 0.19 0.00 0.00 0.00 0.00 1.12 1.12 0.47 0.00 0.00 0.00 0.00 0.23 2.29 0.28 0.00 0.00 0.00 0.00 0.42 0.42 0.05 0.00 0.00 0.05 0.00 1.31 0.66 0.05 0.05 0.00 0.00 0.23 1.08 1.31 0.09 0.00 0.00 0.00 0.09 0.28 0.14 0.00 0.00 0.00 0.00 0.00 0.33 0.00 0.00 0.00 0.00 0.00 0.05 0.33 6.09 7.68 1.59 0.23 0.05 0.33 6.09 7.68 1.59 0.23 15.96 TOT 1.87 2.06 2.25 2.48 2.72 2.67 4.35 5.43 7.72 9.69 10.77 9.32 11.99 12.17 9.27 5.24 100.00 0.00 0.09 1.17 54.82 30.90 9.88 3.14 100.00 Wind Direction by Stability N NNE NE ENE- E ESE SE SSE S SSW SW WSW W Wf NW NNW TOTAL -STABILITY CLASSES-0.00 0.00 0.09 0.94 0.56 0.00 0.00 0.09 1.26 0.51 0.00 0.00 0.00 1.78 0.23 0.00 0.00 0.00 1.78 0.47 0.00 0.00 0.00 0.00 0.00 0.00 1.64 1.73 0.98 0.75 0,09 0.19 0.00 0.00 0.00 0.00 0.00 1.64 1.31 1.08 0.33 0.00 0.00 0.00 2.62 2.01 0.56 0.23 0.00 0.00 0.00 3.65 2.39 0.89 0.80 0.00 0.00 0.05 4.35 4.17 1.03 0.09 0.00 0.00 0.19 3.93 5.01 1.50 0.14 0.00 0.00 0.00 4.78 2.86 0.89 0.80 0.00 0.09 0.28 7.87 2.62 0.75 0.37 0.00 0.00 0.28 6.46 3.93 1.26 0.23 0.00 0.00 0.09 6.18 2.43 0.47 0.09 0.00 0.00 0.09 4.21 0.66 0.28 0.00 0.00 0.09 1.17 54.82 30.90 9.88 3.14 Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable 0.23 0,19 0.23 0.23 0.05 0.00 0.00 0.00 Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W4 WNW Id NNW TOTAL 0.00 0.00 0.33 0.80 0.56 0.19 0.00 0.00 0.00 0.23 1.03 0.66 0.14 0.00 0.00 0.00 0.09 0.56 1.12 0.47 0.00 0.00 0.00 0.14 0.98 0.89 0.42 0.05 0.00 0.00 0.14 0.70 1.26 0.56 0.05 0.00 0.G0 0.14 0.94 1.12 0.47 0.00 0.00 0.00 0.33 0.94 1.36 1.08 0.66 0.00 0.05 0.23 0.94 1.78 1.59 0.84 0.00 0.00 0.14 1.36 1.69 2.25 2.29 0.00 0.05 0.28 1.22 2.39 3.04 2.72 0.00 0.00 0.42 1.54 3.18 2.81 2.81 0.00 0.05 0.56 1.36 4.26 2.20 0.89 0.00 0.09 0.51 1.59 4.35 3.32 2.11 0.00 0.00 0.47 1.31 4.59 3.09 2,72 0.00 0.00 0.28 2.01 4.07 2.39 0.51 0.00 0.05 0.14 0.89 2.29 1,54 0.33 0.00 0.28 4.45 18.16 35.58 25.56 15.96-WINO SPEED CLASSES-CALN-3.5 mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph Mu-m, & Trettk, Inc. 600 Fine Ba' Die, SWoaeA Pa6lan, lUino 60067 (847)963.9000 TABLE 11-22-LaSalle County Generating Statlo 375 ft. Wind Speed and Direction January-Deceiber.

2013 375Ft-33Ft Delta-T (F)Number of Observations

-8610 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

STABILITY CLASSES ----------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU 0.00 0.00 0.00 0.00 MU 0.00 0.00 0.00 0.06 C SU 0.00 0.00 0,00 0.00 A N 0.00 0.00 0.00 0.00 L SS 0.00 0.00 0.00 0.00 H mS 0.00 0.00 0.00 0.00 ES 0.00 0.00 0,00 0.00 EU MU 1 SU-N 3 SS MS ES EU 4 SU-N 7 SS 8S ES EU MU 8 SU-N 1 SS 2 M ES EU 3 SU-N I SS 8 MS ES 0.00 0.00 0.00 0.01 0.03 0.00 0.00 0.00 0.00 0.00 0.30 0.08 0.01 0.00 0.00 0.00 0.02 0.77 0.27 0.10 0.01 0.00 0.01 0.06 1.08 0.37 0.03 0.00 0.00 0.00 0.00 0.02 0.02 0.00 0.00 0.00 0.00 0.01 0.39 0.20 0.00 0.01 0.00 0.00 0.06 0.92 0.36 0.07 0.00 0.00 0.00 0.07 0.71 0.44 0.08 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.31 0.12 0.07 0.00 0.00 0.00 0.01 0.82 0.37 0.09 0.00 0.00 0.02 0.07 1.23 0.45 0,06 0.00 0,00 0.00 0.00 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.37 0.17 0.07 0.00 0.00 0.00 0.01 0.62 0.44 0.14 0.01 0.00 0.00 0.02 0.98 0.49 0.02 0.00 0.00 0.00 0.00 0.00 0.00 o.m0 0.00 0.00 0.00 0.00 0.05 0.02 0.01 0.00 0.00 0.00 0.00 0.23 0.14 0.03 0.00 0.00 0.00 0.01 0.89 0.35 0.09 0.00 0.00 0.01 0.01 0.53 0.70 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.31 0.12 0.03 0.00 0.00 0.00 0.02 0.85 0.29 0.21 0.01 0.00 0.00 0.02 0.52 0.60 0.36 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.02 0.00 0.00 0.00 0.00 0.38 0.21 0.01 0.00 0.00 0.00 0.01 0.43 0.23 0.23 0.02 0.00 0.00 0.06 0.60 0.49 0.36 0.16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.06 0.01 0.00 0.00 0.00 0.00 0.23 0.15 0.03 0.00 0.00 0.00 0.00 0.62 0.26 0.15 0.10 0.00 0.00 0.01 0.67 0.41 0.26 0.13 0.00 0.:00-0.00 0.00 0.00 0.0 0.00 0.00 0.00 0.00 0.05 0.03 0.00 0.00 0.00 0.00 0.00 0.28 0.05 0.08 0.00 0.00 0.00 0.01 0.73 0.29 0.13 0.07 0.00 0.00 0.05 0.59 0.43 0.35 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.03 0.01 0.00 0.00 0.00 0.01 0.34 0.13 0.07 0.00 0.00 0.02 0.17 0.85 0.31 0.23 0.08 0.00 0.02 0.03 0.78 0.72 0.50 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.00 0.00 0.01 0.33 0.13 0.05 0,01 0.00 0.01 0.17 0.67 0.37 0.30 0.02 0.00 0.02 0.13 1.27 1.07 0.65 0.17 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.05 0.01 0.07 0.00 0.00 0.00 0.03 0.44 0.19 0.03 0.00 0.00 0.00 0.06 0.70 0.33 0.20 0.06 0.00 0.02 0.07 1.49 0.84 0.29 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.13 0.03 0.00 0.00 0.00 0.02 0.41 0.06 0.03 0.01 0.00 0.00 0.05 0.95 0.30 0.14 0.03 0.00 0.01 0.05 1.59 0.62 0.15 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.01 0.00 0.00 0.00 0.00 0.45 0.19 0.02 0.01 0.00 0.00 0.02 0.94 0.36 0.17 0.02 0.00 0.02 0.08 1.99 0.87 0.42 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.01 0.01 0.00 0.00 0.00 0.37 0.12 0.03 0.01 0.00 0.00 0.01 1.13 0.34 0.16 0.05 0.00 0.00 0.05 1.80 0.80 0.13 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.05 0.01 0.00 0.00 0.00 0.00 0.31 0.03 0.01 0.00 0.00 0.00 0.03 0.75 0.17 0.15 0.00 0.00 0.00 0.05 1.48 0.35 0.08 0.00 0.00 0.05 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.42 0.49 0.20 0.01 0.00 0.00 0.00 0.09 5.47 2.07 0.60 0.06 0.00 0.00 0.03 0.69 12.64 5.04 2.57 0.50 0.00 0.00 0.15 0.82 17.31 9.64 3.88 0.92 0.06 0.00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.00- 0:00-0;00-0.00-0.00-0.00- 0.00- 0-.00-- -... 0,00.. .0.00 0.05 0.01 0.00 0.00 0.00 0.00 0.42 0.49 0.20 0.01 1.11 0.00 0.09 5.47 2.07 0.60 0.06 8.29 0.03 0.69 12.64 5.04 2.57 0.50 21.46 0.15 0.82 17.31 9.64 3.88 0.92 32.72& Trette Inc.600 Fiit Bank Dnitw, Sute A Paklateie, [mUns 60067 (847)963.9000 TABLE 11 continued LaSalle County Generating Statlo 375 ft. Wind Speed and Direction-23-January-Decemter.

2013 375Ft-33Ft Delta-T (F)SPEED ----------------------------------

WINO DIRECTION CLASSES ----------------------------------

.........

STABILITY CLASSES ..........

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU IMU 9 SU-N 2 SS 41M ES EU GNMU T SU N 2SS 416 ES 0.00 0.00 0.00 0.00 0.01 0.01 0.45 0.24 0.17. 0.14 0.03 0.01 0.00 0.00 0.00 0.01 0.02 0.74 0.15 0.02 0.00 0.00 0.00 0.00 0.09 0.03 0.00 0.00 0.00 0.00 0.00 0.78 0.15 0.01 0.00 0.00 0.00 0.00 0.28 0.05 0.00 0.00 0.00 0.00 0.00 0.50 0A9 0.15 0.00 0.00 0.00 0.00 0.28 0.05 0.01 0.00 0.00 0.01 0.01 0.34 0.23 0.19 0.02 0.00 0.00 0.00 0.03 0.08 0.05 0.00 0.00 0.00 0.01 0.00 0.06 0.01 0.28 0.36.0.31- 0.42-0.36 0.24 0.06 0.07 0.00 0.01 0.05 0.50 0.50 0.29 0.23 0.00 0.00 0.01 0.67 0.87 0.20 0.05 0.00 0.01 0.15 0.75-1.03 0.35 0.03 0.00 0.05 0.06 0.92 1.16 0.19 0.00 0.00 0.02 0.05 0.93-0.84-0.42 0.07 0.00 0.01 0.02 0.30 1.09 0.19 0.01 0.00 0.00 0.01 0.00 0.00 0.03 0.03 0.07 0.06 0.94 1.32 1.23 0.69--0.59-0.49-0.12 0.10 0.10 0.06 0.02 0.00 0.00 0.00 0.01 0.01 0.03 0.00 0.15 0.15 0.08 0.01 0.65 0.65 1.39 0.92 11.68 11.68 0.51- 1.7- 5;80 -....... .08-0.03 0.01 2.45 2.45 0.00 0.00 0.57 0.57 22.39 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.08 0.01 0.00 0.00 0.00 0.00 0.00 0.02 0.28 0.14 0.02 0.00 0.00 0.01 0.08 0.49 0.12 0.00 0.00 0.00 0.02 0.42 0.50 0.14 0.00 0.00 0.01 0.01 1.01 0.77 0.03 0.01 0.00 0.00 0.06 1.13 0,99 0.03 0.00 0.00 0.01 0.02 0.33 0.10 0.00 0.00 0.00 0.00 0.00 0.26 0.00 0.00 0.00 0.00 0.00 0.08 0.22 5.95 6.47 1.09 0.09 0.08 0.22 5.95 6.47 1,09 0.09 13.90 99.94 TOT 3,89 3.07 4.74 4.63 4.70 4.39 4.81 4.94 6.56 9.13 9.36 7.92 8.63 9.84 7.58 4.89 99.94 0.01 0.42 2.47 53.51 30.59 10.79 2.15 Wind Direction by Stability N NNE NE ENE E -ESE SE SSE S SSW SW WS4W W WNW NW NNJ TOTAL 0.00 0.01 0.09 2.66 0.93 0.19 0.01 0.00 0.00 0.15 2.37 1.17 0.16 0.01 0.00 0.03 0.10 3.22 1.14 0.24 0.00 0,00 0.00 0.03 3.03 1.31 0.24 0.01 0.00 0.01 0.02 2.49 1.74 0.44 0.00 0.00 0.01 0.06 2.09 1.32 0.84 0.07 0.00 0.01 0.13 1.72 1.55 1.13 0.27 0.00 0.00 0.03 2.01 1.78 0.81 0.30 0.00 0.01 0.12 2.82 2.17 1.05 0.39 0.00 0.10 0.43 3.67 3.39 1.35 0.19 0.00 0.00 0.07 0.02 0.38 0.22 3.51 4.03 3.51 2.54 1.60 0.85 0.29 0.26 0.00 0.02 0.20 5.31 2.45 0.50 0.15 0.01 0.06 0.24 6.75 2.92 0.77 0.09 0.00 0.05 0.16 5.04 1.87 0.36 0.10 0.00 0.00 0.09 3.75 0.76 0.27 0.00 0.01 0.42 2.47 53.51 30.59 10.79 2.15-STABILITY CLASSES- -Extremly Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extrwely Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW N WNW FNNW TOTAL 0.00 0.05 0.39 1.17 1.56 0.67 0.05 0.00 0.05 0.62 1.41 1.30 0.41 0.09 0.00 0.02 0.50 1.30 1.84 0.95 0.13 0.00 0.02 0.62 1.22 1.51 0.94 0.33 0.00 0.08 0.41 1.35 1.39 1.14 0.34 0.00 0.03 0.46 1.38 1.54 0.80 0.16 0.00 0.06 0.60 0.93 1.67 1.08 0.46 0.00 0.12 0.42 1.13 1.48 1.10 0.70 0.00 0.08 0.41 1.23 1.46 1.58 1.80 0.00 0.08 0.55 1.67 2.13 2.33 2.37 0.00 0.02 0.52 1.56 3.31 2.32 1.63 0.00 0.13 0.70 1.34 2.85 1.84 1.08 0.00 0.19 0.53 1.48 2.49 2.10 1.85 0.00 0.05 0.67 1.52 3.44 1.95 2.21 0.00 0.05 0.53 1.67 2.81 2.06 0.46 0.00 0.09 0.36 1.11 1.95 1.11 0.26 0.06 1.11 8.29 21.46 32.72 22.39 13.90-WINO SPEED CLASSES-CALM< 3.5 nph 3.6 -7.5 nh 7.6 -12.5 iph 12.6 -18.5 ,ph 18.6 -24.5 Wph> 24.5 Tph Muteay & Tvettel, Inc. 600 Finie Bank DB iw Sui,,. A Paladncf, fioe 60067 (847) 963.9000 5.5 Precipitation Monthly totals and the maximum 24-hour and maximum 1-hour precipitation amounts are summarized below. The month with the most measured precipitation was May. The month with the least measured precipitation was September*.

The maximum 24-hour t6tal Was 2:50'"(Apnil) and themaximum-1r-hour totalwas4.17!' (June)-- -.Table 12 Precipitation Totals (Inches) -2013 LaSalle Site Month January February March April May June July August September October November December TOTAL: Total 2.40'1.08*0.86'6.29 6.56 5.44 1.15'3.43 0.57'3.67 2.00*0.61'Maximum 24-hour 1.21'0.69*0.66*2.50 1.31 1.33 0.41'1.42 0.33'1.27 0.72*0.27'Maximum 1 -hour 0.29*0.13'0.13'1.04 0.62 1.17 0.25*1.08 0.23'0.54 0.38*0.08'34.06'* some data are missing -actual precipitation may be under-reported Murray & Trettel, Inc. 6oo First Bank Driue, SuiteA Paline, lfobs 6o067 (847)963-gooo 0 5.6 Doses Resultina from Airborne Releases The following are the maximum annual calculated cumulative offsite doses resulting from LaSalle County Station airborne releases.-LaSalle County Generating.

Station:-

...Dose gamma air beta air (2)whole body (3)skin (4)organ (s) (infant-thyroid)

Maximum Value 2.470 6.960 1.696 2.420 1.462 x x x x x 103 mrad 104 mrad 10.2 mrem 10 mrem Sector Affected East East East East Southeast Compliance Status 10 CFR 50 Appendix I Yearly Objective% of Appendix I gamma air beta air whole body skin organ 10.0 20.0 5.0 15.0 15.0 mrad mrad mrem miem mrem 0.02 0.00 0.34 0.02 9.75 (1)(21 (3)(4)(a)Gamma Air Dose -GASPAR II, NUREG-0597 Beta Air Dose -GASPAR II, NUREG-0597 Whole Body Dose -GASPAR II, NUREG-0597 Skin Dose -GASPAR II, NUREG-0597 Inhalation and Food Pathways Dose -GASPAR II, NUREG-0597 0 Murry & 7'rettel, Inc. 6oo FMrst Bank Drive, SuiteA Palatine, Illnois 6oo67 (847) 963-9ooo APPENDIX Murray & Trettel, Inc. 6o0 First Bank Drive, Suifte A Palatine, Illinois 6o067 (847) 963-9o00 Exelon Contract Number 455465 04 7/10 R-28 Page 1 of 6 LaSalle Meteorological Calibration Date: Z.'(, 13 POWER SUPPUES+12.00OV

0.120v -12.0001 V 0.120V A:+ I- MOW V A: -T ,Z-OV,5, V B: + 12 ~- 212- _V B: -( z d3,0-v Signal conditioners and Digital Recorder.Signal Conditioner Voitage Out .Djgjl rrer AF A!..AL- AL EQ.UfV -- AF AL Specifications Signal Cond.PRCP LO..+/-.e.+/-01V PRCP HI5;,CADbV Q10 ft-. V _ 0._,_ " I 25 ft.WS ZERO , Q.OV WS SPAN!Z'qf

_V WD ZEO V)5PANI 3 3 3 3 v LitRO izOL v-TSPAN O V WS ZEROO ~V WS SPAN! 97-V WD ZERO-0,C)

V WD SPANI+/-3_3 V AT, ZERIOý I -1'Nv A~T, SPAN+/- -Mlv Ar 2 SPAN.L 5O 0 V WVSZERQ.LýGV N'D ZERO- Ao' V-VD SPANL 3 1-LV%T 1 ZERO_'0-_V kERO' 4 -:3V%T 2 SPANIf.9 1? V ,oz 5' V _o'a, mph___ V S".C) mph-0 200 f t 4Q-6PZ fV L, ý"mph._____P4 V mph ,-- .V 0 5- v .a 0.400 V -J0,Oc, L, 22ý" V &;). DOh"-- V O-.~v 7o 375 ft, K.dZý-V _____-4'mph

___v (___mp.._V ,_, ___v (0' 6.0 OLfo V L. E mph _mph mph -mph 4c 0 z.. bz. o_z/. _ TO a.ýL. mph " mph 2- -_.mph -- mph 0 -0° 0 jL. _"mph_ -mph-mph. mph* a 3 0~ a-12,Oi a -- 0 0 0 0.000V

0.050V 5.000v1 0.050V 0.02511*0.025V 2.500V , 0.025V 0.000V 0.1 00V 3.333Vt 0.100V 0.000VA 0.050V 5.000V1 0.050V 0.0251V

0.025V 2.500V1 0.025V 0.000V t 0.100V 3.333V + 0.100V 0.000V1 0.050V 5.000V1 0.050V 0.000V1 0.050V 5.0001 V 0.050V 0.025"V t0.025V 2.500V 1 0.025V 0.000V

0.100V 3.333V t 0.100V 0.000V1 0.050V 5.000V & 0.050V 0.000V1 0.050V 5.000V

0.050V AL EQUIV

0.01" AL EQUIV i0.01" AL EQUIV+ .1mph AL EQUIV+ .Imph AL EQUIV + 1 AL EQUIV + 10 AL EQUIV+ .1OF AL EQUIV + .1OF AL EOUIV + .1mph AL EQUIV + .1mph AL EQUIV + 1a AL EQUIV + 10 AL EQUIV + .1F AL EQUIV +.I OF AL EQUIV + .1mph AL EQUIV+ .1mph AL EQUIV + 1*AL EQUIV + 10 AL EQUIV + .1 OF AL EQUIV+ .IF M rwm& Tren4 lr=

600 Fhst Bank Dfe, A .PaIde, IMinds .60067 3I (847) 963.9000 Exelon Contract Number 455465 LaSalle Meteorological Calibration D5 7/10 R-28 Page 2 of 6 Date: 2--......TOWERMEASUREMENTS

.. ... ..Ambient [:] Ice Bath Temperatures 33 ft. Amb,. 200 ft. A T, 375 ft. A It AF AL AF AL AF AL".___ %I -°F -,Z80F __F -2.0 1 F F--t,3. -9F OF F --,1 "F OF- Z. 0 OF F.arF OF .-0: oF -F .F -OF+/-0.5 0 F -0.18°F ,0.1BOF Measured Recorded Difference Specification WS stall Forw. WD Revr. WD Tracking/wear 33 ft, AF AL I' mph O.mph r OIL wEnds 200 ft.AF AL L, _5" mph L. -1590 IZ. --,375 ft.AF AL mph 7 0 -1 j7~ 0 -0 Specificatiob 0.5mph + 0.45mph 00/300° +/- 50 180015400 150 jA W%~ topolb.JeO krou.(O It41 i #j s-m i e ar(~Comments: LL4 1is-t101ICD rolT Z0q*31orr Ws% MW&h(ID 'rO M AY- 93 Mwnuy & Tiwttd, Inc. -60D Flit Bank Droe Suit A.- PakVPw. Illnois -60067 9 (847) 963.9000 Exelon Contract Number 455465 DS 7/10 R-28 Page 3 of 6 LaSalle Meteorological Calibration Date: Dates of Last Wind Sensor Bearing Replacements:

(6 mos.) Wind Speed: (12 mos.) Wind Direction:

33 ff--Z 200 3-9 .it/0Io --JIz.Aspirators:

_0_f- 09.-, ___Operation of De-ice Heat Lamp System (Aug-Mar):

0&*Operation of Rain Gauge: _6)-- Tips Poured 5" Tips Recorded -UPS CHECK: aL Debris screen: In ( ) Installed Removed Tower Lightinn Good Fair Poor Tower Condition Good Fair Poor Beacon 1D E] Paint 13 [1 Side El E" Wiring I 0 0 Flasher r7 0 0 Shelter condition I 0 0-Note: Calibration Instruments:

Next Cal Due AF = As Found Psychrometer--S/N-

" AL = As Left Digital multimeter.

S/N- q+/-'Wt-o6 VAIL2Oi5--= no change (AF=AL) Digital multimeter

-S/N -O(tIlm' Thcf-rftr c/d /nrot3-7 al or &Di 33 FS = Full Scale Technicians:

_______________-

149 Comments. )i Z 14q- LAIW5 ewT W-f5 26OF T __ /,4,ec d At~ZLL Signature--- I.-M &na &TreTaL Inc.

600 Fm BhmkDrnie, SwiteA. Po~iwne lUlinnf .600673 (847) 963-9000 Exelon Contract Number 455465 D7 7/10 R-28 Page 4 of 6 System Response Check Date:'2 -&L/I-Site: LaSalle System: Microtel Low Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WI 33' T 200' AT 375' AT Check__..__

Expected 20.0 10.4 20.0 +/-0.4 20.0,0.4 108 +/-2 108 +/-2 108 +/-2 6.80 +/-0.7 -6.00 +/-0.18 -6.00 +/-0.1I Response _As Found -,.Response 1___ .1 '.S I/.00 _ _ I _ /lo0 &.-- -,,O I As Left ..- -*- -Response .,.MMd SPale 33' WS 200" WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT FJ5cted 60.0 +/-0.4 60.0 +/-0.4 60.0 +/-0.4 324 +/-2 324 +/-2 324 12 64.40 +/-0.7 2.00 +/-0.18 2.00 +/-0.18 Response I Fo3nd 3 -3 3 Z -.O 1-As Left Response Full Sca 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 80.0 +/-0.4 80.0 +/-0.4 80.0 +/-0.4 432 .2 432 +/-2 432 +/-2 93.20+/-0.7 6.00 +/-0.10 6.00:+/-0.18 Response As Lefto Response Ayj -5 %1 M una Tmtt4 Ina.. 600 Fint Bantk Dvrtxt Sutgt A. -alatiie. Ilivnoi, 60067 9 (847) 963-9000 1 0 Exelon Contract Number 455465 D8 7110 R-28 Page 5 of 6 System Response Check Data 7Z-f.-j-6 Site: LaSalle System: Process Computer Mid A847 A848 A849 ABSO A851 A852 A853 A854 A55 A856 Check 375' WD 200' WO 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' t.T Precipitation Reposed 324+/-t2 324 +/-2 60.0 +/-0.4 60.0+/-,0.4 8.00+/-0.15 60.0+/--0.4 324:+/-2 64.40 +/-0.7 8.00+/-0.18 0.60+/--0.01 Response __ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ __ _ _ _Au Found Response " _ _ _ _ " q .1 l S .(:)'C 1 9 , O. 7 , A(.. " (o0 .1,A o.S" As Left s9.-, -Response Fud Lcat A847 A848 A849 ýAS850 A851 A852 A853 A854 A855 AB55 ghea 375' WD 200' WO 375' WS 200' WS 375' AT 33' WS 33' WO 33' T 200' AT Precipitaton Repected 432 12 432 .2 80.0+/-0.4 80.010.4 14.0010.18 80.0+/-0.4 432 +/-2 93.20-0.7 14.00t+/-0.18 0.80t+/-0.01 Response ____ ____ ____As Found _ -79n Z. , -.1 .-6 As Left --- q ReMspon0e M -MY, T re-1 ivw. 600 Fret BaAk d e S -iw A .Palan¢,/ 1/ft

60067 (847) 963.9000 Exelon Contract Number 455465 D9 7110 R-28 Page 6 of 6 System Response Check Date: Z- G -'3 Site: LaSalle System: Control Room Indicators Mid Scale Chl "200 WS 375' WS 200' WO 375' WD 375' AT Expected 60.0 +/-1.0 60.0 +/-1.0 324 +5.4 324+/-5.4 8.00 +0.3 Response I AAs Found f( 0 LODD I 4 1 1 I MW As Left j I I L MwMy & Temel, Ipt.. -600 Rat Bank DiWv, S~wi A -Pal dne. Iliiiai .60067 9 (547) 963.9000 Exelon Contract Number 455465 D4 7/10 R-28 Page 1 of 6 LaSalle Meteorological CalibrationD Date: (P 1týPOWER SUPPLIES*12.000V*k0.120V

-1 2.0OOV*t 0. 120V1 A-.+ 11,oi OL V A-.- 12 -3~ v3-B:* vOZ V :-32C1(a Signal conditioners and Digital Recorder.rNnndiflnrnrlr Vdit~n flo11 AF~~ AL -ALEQU-IV 10 -ft,-DIalla recrder AF AL'cDn 2)Specifications Slanal Cond.PRCP LO 0. -OWV PRCP HI j,)2Ev_-__V 0,a 0-ZV /. DO d 35 ft.WS ZERO.. OZQ.V WS SPANI, _-0SV WD ZERO, 0 0 _V.* SPAN_. S_15_V ZERO j0Q V T SPAN ;o 0Ob V WS ZERO. 02S. V WS V WD ZERO,401, _V WD SPAN! AT 1 ZERO.LV V AT, SPAC6 0&V AT 2 ZERO ". oo00 V AT 2 V WS ZERO .027' _V WS SPAN!-5?J 8 V WD ZERO- 00 V WD SPAN2'2-'>

V AT 1 ZERO.-oO3 V.-T, SPAN 2 ZERd-,(_ V AT 2 SPAN, ,V--.- Lc, -_mpt,-1100 200 f 1,-0 V Cmp-V 3&DO*4~V 1-10. 00.000 11 375 ft._____0V -:a -empt ,OdV I O.E- mph -: mph O_____mph_

"" mph a,6a --.0 0"" mph I "0mph -.mph w7 a -0'1 0 0 0/a.e a 61 0 , .- mph_2 rmph---/0,0/ o -a* -. 0 0.000V : 0.050V 5.000V

0.050V 0.025V

0.025V 2.500V .0.025V 0.000V 10.100V 3.333V 10.1001V 0.000V +0.050V 5.000V + 0.050V0.025V 2.500V + O.025V 0.000V1*0.100V 3.333V t 0.100V 0.000V + 0.050V 5.0001V t 0.050V 0.000V + 0.050V 5.000V + 0.050V AL EQUIV + 0.01" AL EQUIV

0.01" AL EQUIV + .1mph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV +A.F AL EQUIV + .101: AL EOUIV+ .lmph ALEQUIV+ .1mph AL EQUIV + 10 AL EQUIV + 1a AL EQUIV+ .1F AL EQUIV +.1 OF 0.025V i 0.025V AL EQU 2.500V t 0.025V AL EQU O.000V t 0.1001V AL E 3.333V1+0.100V ALE 0.000V

0.050V AL EQ 5.000V1 +/-0.050V AL EQ 0.000V t 0.050V 5.000V +/- 0.050V a~- ? "/0q1 IV+ .1mph IV + .1mph EQUIV + 10 EQUIV + 1 a IUIV+.1IF IUIV+.1 0 F MwMz~&Tru4 Iwftc. 60 daOPnt Bank Dd,*i, SidleA Pa~tn. Il~rto -60067 3 (847) 963.9000 Exelon Contract Number 455465 LaSalle Meteorological Calibration D6 7/10 R-28 Page 2 of 6 Date: I'f- 23 TOWER MEASUREMENTS

,1 O~lnt[10Bi Measured Recorded Difference specifscton 33 ft. Amb.AF AL 1- s 5 0 F ' eO+/-040°F F 0.50F-1, 00... "F-I. ao O-I.DOT°i,-.18"F oF-OF' --- OF Temperature 200 ft. -AT AF AL-375 ft, A L AF AL 40 OF F 0.18OF 33 ft.AF AL WSstalB .5 mph 0-5 mph Forw. WD 1 3o -°Rea. WD I Wlnds 200 ft.AF AL 0,5mph L_5 mph a 3 75 ft.AF AL 2, 5. mph O, 5_mph 36J0 0 5 A a Svecificaton 0.5mph i 0.45mph 0013600 165 180015400.

50 Tracking/wear Comments: acoAs 3-76 JS HT Q Q 5~124*4 U k.34?1Oe.

LALU KT G7 -0&td Muua& & Tuet, In,

600 Fint Bank Drie SidteA. P,&da,,A e, Ighn/ .600671 '(847) 96,9000 Exelon Contract LaSalle Meteorological Calibration Number 455465 D6 7/10 R-28 Page 3 of 8 13 Date: .1(Dates of Last Wind Sensor Bearing Replacements:

(6 mos.) Wind Speed: (12 mos.) Wind Direction:

33 ft.200 ft. ft.33ft. go ft. 375f ft Aspirators:

t2 k Operation of De-ice Heat Lamp System (Aug-Mar):

V11I Operation of Rain Gauge: 0 V._ Tips Poured j_ Tips Recorded 5 UPS CHECK: O ...Debris scree 7 2-n Out Installed Removed Tower Lightn Good Fair Poor Tower Condition Good Fair Poor Beacon 1:1 10 Paint 20 0 0-Side lights Ef 03 0: Wirng 0 0 0 Flasher z 0-3 0 Shelter g .n P 0l 0 Note: -Calibration Instruments:

Next Cal Due AF = AsiFound Psychrometer-S/N ar= 49 -3 AL = As Left Digital multimeter

-SIN -.? D-'-T6-= no change (AF=AL) Digital multimeter

-S/N -FS = Full Cale Technicians:

-CA., ,-.Comments:-I- ., MoMa & TyeaAL Inc. .600 Fiat Bunk Dftw Suite A.- Palune, I~Wbn .60067 V(847) 963.9000 Exelen Contract Number 45546!D7 7110 R-28 Page 4 of 6 System Response Check Dats: L'1I-13 Site: LaSalle System: Microtel Low c 33' WS 200' WS 375' WS 33' WD 200' WD 375 WD 33' T 200' AT 375' AT Expected 20.0 +/-0.4 20.0 +/-0.4 20.0-0.4 108 +/-2 108 +/-2 108 +/-2 6.80+/-:0.7

-6.00+/-0.18

-6.00+/-0.18 Response As Found[a3to0 As Left -j --Response ___Scale 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Expected 60.0 +/-0.4 60.0 +/-0.4 60.0-0.4 324 +/-2 324 +/-2 324+/-t2 64.40 +/-0.7 2.00 +/-0.18 2.00 +/-0.18 Fponde __.__,,_.

___. -" .__ ,___ _ __. I _________As Left .... -. -I -Response Full Sea 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Check _________

_________

_______ __Expected 80.0 +/-0.4 80.0 +/-0.4 80.0 +/-0.4 432 +/-2 432+/-2 432 .2 93.20 +/-0.7 6.00 +/-0.18 6.00 +/-0.18 Response --AS Found Response 79 u "--z ("o. ,(.( , J'. .As Left -. ,. .----Response MwMy & Tuzr4 Ina.. 600 IEh Dank Dr(Ae Suie A -Palatinr 111hin~s 60067 9(847) 963.9000 Exelon Contract Number 45546.D8 7/10 R-28 Page 5 of e System Response Check Date: __-_" ___Site: LaSalle System: Process Computer Low A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' V T Precpitation Expected 108t2 108 *2 20.0 +0.4 20.0 +0.4 -4.00-0.18 20.0+/-0.4 108 +2 6.80 +/-0.7 -4.00*0,18 0.20 +/-0.01 Response ., As Found_/____

I__._ _ _._. ______.._Response 16,7.' /, J iO.O jq.'- ,O IIZO. _ la ,.AsLfft -__ -; -ResponseI Md sl A847 A848 AM849' A850 A851 A852 A853 A854 A855 A856 Me 375' WD 200' WD 375' WS 200( WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Reponsed 324+/-2 324 :t2 60.0 +/-0.4 60.0 -0.4 8.00+/-0.18 60.0 +0.4 324 *2 64.40 *0.7 8.00+/-0.18 0.60 +/-0.01 Response 3Zi3 _ _ _ _ _ -&$,4- , ol 3..' 1-~r ._ _As Found Ado R e s p o n , " 14' .U 3 .0 15 0 .J,

7 -7 .' o fo0 .1 (3. .- 1 ,, -) * .-7 .9 0 .4 0 O As Left .... --Response Full Scale A847 A648 A849 A850 A851 A852 A853 A854 A855 A856 Chec 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected 432 *2 432 t2 80.0:+/-0.4.

80.010.4 14.00-t0.18 80.010.4 432 t2 93.20-0.7w 14.00"10.18 0.80+/-0.01 Response As Found : 7-_ _7_ ,.36 q_Response if5Zl. "3.- 479, 3q. 93.0 As Left -I --Response MuwMe & TwU4 Intc..- 600 Pnmt Bank Thiw. Suite A -Pakdze Nf~fm .60067 9(847) 963-9000 Exelon Contract Number 45546.DE 711C R-28 Page 6 of 6 System Response Check Date: (f -f -1 Site: LaSalle System: Control Room Indicators Low Scale Cheo(; 200' WS 375' WS 200' Wa 375' WD 375' AT Expected 20.0 t1.0 20.0+/-1.0 10815.4 108 +/-5.4 -4.00 +/-0.3 Response As Found Response 0 2,..C) (( 0 Ito _ L.As Left Response I Mid Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 60.0 +/-1.0 60.0 +/-1.0 324 +/-5.4 324 +/-5.4 8.00 +/-0.3 Response ._, As Found Response (_ 0_______ _____' _ __, _-AS Left Resoonse M-7wa & Tyeze Inc. -6W0 Fft Bank Dn~w 5.ui A.- Po,6nr,. lImnaiu 600O V (847) 963.9000 Exelon Contract Number 455465 D4 7/10 R-28 Page I of a LaSalle Meteorological Calibratior Date: Jo "I" 3 POWER SUPPLIES+12.000V + 0.120V -12.OOOV

0.120V A:+ 12 -0I R _V A.h. --V 8: +l 11 -DA .. .,:.I ... --- v--Signal conditionem and Digital Recorder.Inn~l _nnribnar nlM f' nm Af M --if AF. AL AL EQ.UIV 10 ft.Digital recorder AF AL 0.0 -"---PRCP LO O. ObOV PRCP HI 5" C00 V_____v O.oA WS ZER02QI-4iV WS SPANA 1L 40 V WD ZERoDI- -0y WD SPA~I43.fL..V TZERO QD.OOOV T SPANJ V WS ZERjQQ..Qj-V WS SPANJ. q4IDO v WD ZERO-O -O00 V wD spAN-2l-3Lv AT, ZERO.2-P02V AT, SPANj _.0OD V AT, ZEROý _WCc'V AT 2 SPAN..--Q-2Y WS ZEROD;.1V WS SPAN2--1A -DV WD ZEROD -bD V WD SPANI3LWV fT 1 ZERO..Q--QbD AT, SPAN+/-a451YV AT, ZERO!, _M0V AT 2 SPAN-.jL Qb 35 ft._-___V 0Q.-5 mph L- 100 V Qj2.mph-- V3(0 0_____v -fl, b 200 ft.,____V _0.&_mph--500 V mph-v -ID0 o--V v -O :o-=_V 375 ft."-- V Dimph_____" V ..mph vO.O_:._O:_v 1o. *----" V-__ V 05 mph k- mph A0. 0 mph " mph 0_3(,O, o __" _I6L..a __---a L.Omph -mph"b0 mph- mph.0 mph mph't0,O * -- ../0.0 .--- 0-Signal Cond.0.000V

0-050V 5-0OOV

0.050V 0.025V i 0.025V 2.500V

0.025V 0.OOOVi*O.IOOV 3.333V *0.IOOV O.OOOV i 0.060V 5.00OV 0 .050V 0.025V

0.025V 2.500V t 0.025V a.000aov .1 oov 3.333V

0. 100V o.00OVh 0 .05oV 5.000W I 0.050V 0OOOoV i 0.050V 5.000V i 0.060V 0.025V*k0.025V 2.500V

0.025V O.O0voV 0.1 Gw 3.333V* 0 .1OO 0.000V *0.OSOV 5-00W

0.050V 0.000V +/-0.050V 5.00W V 0.05WV AL EQUIV 10.01" AL EQUIV, 0.01" AL EQUiV +.lmph AL EQUIV + .1mph AL EQUIV + 10 AL EQUIV + 10 AL EQUIV + .1F ALEQUIV+.1 0 F AL EQUIV + .1mph AL EQUIV+ .1mph AL EQUIV + 1I AL EQUIV + 1 AL EQUIV + .1OF AL EQUIV+ .1 0 F AL EQUIV + .1mph AL EQUIV + .1mph AL EQUNV + I1a ALEQUIV+1 0 AL EQUIV +.1OF AL EQUIV + .A°F Pa. I Iz- a-MwrMa & T7r4 Inc.

600 Fiat Ba4 Dri;e, Stdt A. lMlhnob .6006731 (847) 963-9000 m Exelon Contract Number 455465 LaSalle Meteorological Calibration D5 710 7/10 R-28 Page 2 of 6 Date: l --TOWER MEASUREMENTS W-.Amblen ic Bat Measured Recorded Difference Specification 33 ft. Amb.AF AL (4,11-F -°F.oPo 'F -°F+0.5 0 F Temperatures

.200 ft. A l T_AF AL-F -F-I°F7Qe --°F-.0 OF -F+/-0.180F 375 ft. A , AF AL)-1 _ _-F ,°F a0,1 F -F"+/--0.18OF 33 ft.AF AL WS stall r. .n__.mph Forw. WDO Ravr. WD 121 " J0 Trackdng/wear b[.200 ft, AF AL k.z.-_mph

'_ mph 36I4 1002L 375 ft.AF AL 0.5 mph k...mph ,1- 7 Snecification 0.5mph +/- 0.45mph 00/3600 +/- 50 180015400

+/- 50 Comments: T~~ld D S 'tTx3 e~~4W5 K2~4 Wo. Cr geauyt WS Ifp gzk I4t3 6A Erat 5'3- LtJ VW(OPTO 16O614 Munssy &Tc Tret, eI.c.

600 Fiat Bank Dviuei Suit A .Palane, llibr .600671 (847) 963.9000 Exelon Contract Number 455465 DS 7/10 R-28 Page 3 of 6 LaSalle Meteorological Calibration 0 Date: !Q -13 Dates of Last Wind Sensor Bearing Replacements:

(6 mos.) Wind Speed: (12 mos.) Wind Direction:

33-4.10-4-Ps-10-44b __.2008. 33f. k 375fk Aspirators:

QV Operation of De-ice Heat Lamp System (Aug-Mar):

.Operationof Rain Gauge: BYL- Tips Poured..." .Tips Recorded-UPS CHECK: M\C_Debris screen: fnJ Out Installed Removed Tower Liotn Good Fair Poor Tower Condition Good Fair Poor Beacon 'E lPaint O 0 Side lights , Wiring 0" 0 El Flasher [2 0 E Shelter condition 0 0 -Note: Calibration Instruments:

Next Cal Due AF = As Found Psychronmeter-SIN- "c 2 (-1 -AL = As Left Digital mulitmeter-S/N -_,Mb, Now DI.3-= no change (AF=AL) Digital multimeter

-S/N -FS = Full Scale Technicians:

J A A. .4. _Comments:

^. j).AJ Ct& eA POLO A St* M A 1 I t',ýL .L14 Signature lQ.iia.r.Mumu & Tremei, Inc. -600 Fim Bank Drit, Suite A.- Paktine, illinois .6006732 (847) 96.3.9-000 Exelon Contract Humber 45546!07 7110 R-28 Page 4 of 6 System Response Check Date:_/_-

L_ / 3 Site: LaSalle System: Microtel Low Sca 33' WS 200' WS 375' WS 33 WD 200' WD 375' WD 33' T 200' AT 375' AT Check Expected 20.0 +/-0.4 20.0 +/-0.4 20.0 +/-0.4 108 +/-2 108+/-2 108I 2 6.80 +/-0.7 -6.00 +/-0.18 -6.00 +/-0.18 Response I As Found 7 ( (.,.Repouse Ic. cr, 017 , As Left -- -..---Response Mid Sca 33' WS 200' WS 375' WS 33' WD 200' WD 375' WD 33' T 200' AT 375' AT Esponte 60.0 -0.4 60.0+/-0.4 60.0 *0.4 324:12 324 +/-2 324 *2 64.40 +/-0.7 2.00 0.18 2.00 +/-0.18 As Left -Response 33' WS 200' WS 375' WS 33' WO 200' WD 375' WD 33' T 200' AT 375' AT Expected 80.0 +/-0.4 80.0 +/-0.4 80.0 +/-0.4 432+/-.2 432+/-2 432 +/-2 93.20 +/-0.7 6.00 +/-0.18 6.00+/-0.18 Response ____ ________ ________ ___ ___ ___ ___As Found 0 e" Responee1q 9 7q.~ <1 q I-z -'S.C As Left Response F. I Munm~ & Tie*v Inc -600 Finte Bank D0.ir S~di A -Pakazinc.

JWisj. 600673V (841) 96J-9000 I Exelon Contract Number 45546.D8 7110 R-28 Page 5 of e System Response Check Data: (0- 1-(-t3 Site: LaSalle System: Process Computer Low Scale A847 A848 A849 A850 A851 A852 A853 A854 A855 A856 ChecA 375" WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200 WAT Precipitation Expected 108 +/-2 108+/-2 20.01+/-0.4 20.0 +/-0.4 -4.00-+/-.18 20.01-0.4 108 +/-2 6.80+/-0.7 4.00+/-.18 0.20 +/-0.01 As Found0 Response ioe. 3 As Left --_. ,--- -,-- , , I Response Mid A847 A848 A84 " A850 A851 A852 A853 A854 A855 A856 Ch 375' WO 200' WD 375' WS 200P WS 375' AT 33' WS 33' WD 33' T 200' 4T Precipitation Expected 324+/-2 324 t2 60.0 +/-0.4 60.0+/-0.4 8.00+/-0.18 60.0+/-+0.4 324 +/-2 64.40 +/-0.7 8.00+/-0. 18 0.60+/-0.01 Response --_As Found 3-z.-.. G -(P.D. .7F -4 1 P-) (P-1Q Response As Left Response Full Sce A847 A848 A849 ABSO A851 A852 A853 A854 A855, A858 Check 375' WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected esponse 432 +/-2 432 +/-2 80.0+/-0.4 14.00+/-0.18 80.0+/-0.4 432 +/-2 93.20.0.7 14.0010.18 0.80 +/-0.01 Response _________AS Fo und O3 3.o 15'") 4 --. I' .. JL I,5 7 'O ./ ? , -) q .V O R~esponse As Left --Response ___AR- 11. 15 Mwurm& Twut4 Ir.m -60 PntBoR D Suee A -Palaiim, lIrMnaf -60067 W 847) 963-9000 Exelon Contract Number 45546.DSC 711C R-21!Page 6 of E Date:__________

System Response Check Site; LaSalle System: Control Room Indicators Low Scale Check 200' WS 375' WS 200' WD 375' WD 375' AT Expected 20.0 +/-1.0 20.0 +/-i.0 108+/-5.4 108 +/-5.4 -4.00*0.3 Response, As Found Response _____ _____ 1 _ ___As Left ,.. .Response I Mid Scale Check 200' WS 375' WS 200' WD 375" WD 375' AT Expected 60.0 +1.0 60.0 +1.0 324 15.4 324 +/-5.4 8.00 +/-0.3 Response _Response W As Left r.numn...a .L L .1.Mumvy& Tnctul. Inc. -6 0 0 Rat Bank Dri-, Sw.iA -Padw Illnob -6W6? W (847) 963-9000 RAI # MA-01 ATTACHMENT 5

Annual Report on the.Meteorological Monitoring Program at the LaSalle CoUnty Nuclear Power Station 2014 prepared for Fxeaon Nuclear Warrenville, IL 60555 by Murray and Trettol, .Incorporated 600 First Bank Drive, Suite A Palatine, IL 60067 (847) 963-9000 e-mail: mt.weathercommand.com For Exlorn Use Only Reviewed 0.7 -Murray & Trettd, Inc. 6o First:RankDriveSuiteA Palatine.Iffwis 60067-(847)953-9000:

i Table of Contentw section Description Pg List of Tables ...... .........

...... .**.......-,.......*...*,,..

Sunirnary, .........

... 2 3- Data A..u.iti..

......................

~. .....*..... 3, 4, -Data ......l .........

...............

5 Re u t ....... ........ .................

Site Calibration logs............~.......

........ .......... .. .Appendix Murray&nTette4 Inch 6oo FirstBdnk Drve,&SdteA Palatine, finfois 60067 (847)963-9000 ti List of Tables Number Description Pae 1Instrument L c to s , ,. .o. ..... ....... ....................

,.................

4 2 Data Loggers ...... 4..............

........................

.4:3 Wind Direction Classes., ..........

............

..........................

7 4 Wind Speed Classes ......................................

....... .7 5 Atmospheric Stability Classes .........

......... ..........

......8 6 Data Recovery Summary .............

................

1 7 Wind Rose, January-March 2014 .........

.............................

.........

4 a8 W ind Rose,,Apdl-June 20,14 .................

....*...................................

16 9 Wind Rose, July-September 2014 .............

.... 18 10 Wind Rose, October-December 2014 ........ .... ......................

20 11 WindRose, January-December 2014:.. i ... ....................

22 12 Precipitation Totals ..............

.... ......................

24 13 Maximum Doses Resulting From Airborne Releases ...................

...... 25 Murray & Trettel, Inc. 6co First ank Drive, SuieA Ilinois 60o67 (847)963.9ooo 11 Introduction The purpose of the meteorological program being conducted at the LaSalle County Station site is to provide information sufficient to assess the local weather conditions and to determine the degree of atmospheric dispersion of airborne radioactive effluent from the station.The meteorological tower is 400 ft. high and is instrumented at three levels. Wind speed and direction are measured at 33 ft., 200 ftC, and 375 ft. Ambient temperature is measured.at 33 ft Differential temperatures, referenced to 33 ft., are measured at 200 ft.and 375 ft. Predcpitation is measured at- approximately 10 Lft Joint frequency stability wind rose tables of wind direction,.

wind speed, and stability are routinely tabulated from hourly measurements.

The quarterly and annual tables are included In this report..Descriptions of the instruments and digital recorder are, given in Section 3 (Data Acquisition) of this report. Data reduction and processing are described in Section 4 (Data Analysis).

The results given in Section 5 of this report include modeled maximum whole body doses, sklin doses, organ doses based upon airborne releases, and site meteorology., Murray &1vettel, Inc- 6oo First BankDrie SukeA "Palkfne, llinais 60o67 (f47) 963"9000 2. Summary The LaSalle Station meteorological monitoring program produced 78,722 hours0.00836 days 0.201 hours 0.00119 weeks 2.74721e-4 months of valid data out of a possible 78,840 parameter hours during 2014 (385 days x 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months s/day x3 9 measured priority parameters), which represents an overall data recovery rate of 99.9%. Priority parameters are all parameters except precipitation.

The stability wind rose tables included in this report have been generated using the 375 ft. wind data with the 375-33 It. differential temperature data.The maximum annual calculated cumulative doses resulting from airborne releases were as follows.LaSalle County Generating Station: gamma air dose beta air dose whole body dose skin dose organ (infant thyroid)5.380 x 10"W mrad 1.930 x 104 mrad 2.220 x 1 0 mrem 5.570 x 10"3 mrem 4,170 x I0" 0 mrem Murray & Trette4 Inc. 6ooa PakatineglI'nois 60067 (847)963-9000 3, Data Acquisitlon.

Wind speed and direction are measured with Climatronics F460 wind sensors. Theawind speed sensors have a starting speIed of 0.5 mph (0,22 mps), a range of 0 to 100 mph (0 to 44,7 mps), and a system accuracy of +/-1:.0 mph at .100 mph (+/-0.45 mps at 44.7 mps),. The wind direction sensors have a threshold speed of 0.5 mph (0.22 raps), a range of 0 to 5400, and a system accuracy of +/-5,0.Ambient and differential temperature are measured with the Climatronics 100093 system.Ambient temperature is measured within the range of -22 to 122TF+(-30 to 500C) with an accuracy of +/-0.6 0 F (+/-0.30C).

Differential temperature is measured within the range of-10to 10 0 F .(-5.68to 560C) with an accuracy of +/--O.18F (+/-0.1011), Precipitation is measured with a Climatronics 100097 tipping bucket rain gauge and is measured in increments of one one-hundredth of an Inch with a system accuracy of +/-1%for rain rates of' !-3'/hr and +/-3% for rain rates of 3-64hr.Instrument types and locations are summarized in Table! .1 The meteorological data are collected'and stored by a MiCrotel 4.0 data acquisition system. The. Microtel measures the analog voltages ofthe instruments and records the digital equivalent within the range of 0 to +5 volts. TheMicrotel hasthe capability of storing 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months of minute data and one week of hourly data. Data are obtained from the Microtel by a direct dial telephone hookup to an in-house computer system. Data are sampled every second.As a backup to the Microtel, data are also recorded with a JohnsonYokogawa Corp..digital recorder (JYC DA100 data: acquisition unit and ,Contec;IPC-PT/M300(PC)WOU PC). Data are sampled every 10 seconds".Data loggers are summarized in Table 2.M-arraM &TRette4 na. 6oo First BaakDrive, SuiteA Palatine, linois 60067 (847) 963-9000, Tabl.u 1 Table II Inst~rumqnt Locations-Measurement Wind Speed Wind Direction Differential Temperature Wind Speed Wind Direction Differential Temperature Wind Speed Wind Direction Ambient Temperature Sensor Type Climatronics 1000756 460: Clirnatronics 100076 F460 Climatronics 100093 Climatronics 1.00075 F460 Climatronics 100076 F460 Climatronics 100093 Climatronics 100075 F460 Climatranics 100076 F460 Climatronics.

100093 Climatronics 100097-1 Tipping Bucket Rain Gage Location Tower Tower Tower Tower Tower Tower Tower Tower Tower Elevation 375 375 ft;1'375 ft.200 ft-200 ft.200 ft.33fit 33 ft 33 ft, Precipitation Meteorological shelter roof!0 ft.Table-2 Data Locces Sampling Measurement, Logaer Tve Freauencv, Winds, Temperatures, Microtel 4.0 data acquisition system I sec.and Precipitation Winds, Temperatures, Johnson Yokogawa Corp. Digital Recorder 10 sec.and Precipitation (JYC DAt00 and Contec IPC-PT/M300(PC)WOU) digital recorder Murrayg& Trýettel, Inc. 6OooFirst BcnkDrive, &dteA Palatine,1lhbis 600,67,(847) 639000a 4i Data Analysis The LaSalle Microtel is routinely interrogated to obtain hourly average data. The data are then stored in the meteorological data base and listings of the data are generated.

The data listings are examined by qualified personnel and any apparent problems are-brought to the attention of the Project Manager or Meteorological Technician and the Instrument Maintenance staff.Hourly values of wind speed, wind direction, ambient temperature, differential temperature, and precipitation are obtained through measurements taken at the site., The standard deviation of wind direction (sigma) is derived. The wind direction variation, Is described in terms of the standard deviation of the direction about the mean direction., The Microtel computes an hourly value of wind sigma by taking the, Root-Mean-Square (RMS) of the four quarter'-hour wind sigma values. The Microtel quarter-hour wind sigma values are calculated directly from the one second, wind direction samples during the 15 minute period., The data base files: are edited approximately once a wek Missing MicrotelvalUes are.replaced with digital recorder values, when available.

Invalid data are.deleted from the data base;Murraj & TrettelInc.

6oo frst~ankDrivc,&SdfeA Palatiiw f.lnois 60067 (847).96~3-9000 When an hourly valUe is missing or invalid, the-numera1 999 is entered into the computer data file in the appropriate location.

When the wind direction changes substantially relative to its short term fluctuations, the numeral 888 can be entered into the wind sigma location to indicate shifting winds. When the wind blows with velocities near the sensing threshold of the instrument, the numeral 777 can be entered into the wind direction, wind speed, and wind sigma locations to indicate light and variable winds.A professional meteorologist reviews the data, calibration findings, equipment maintenance reports, and other information and determines which data are valid. Only the valid data are retained in the data base.As a quality control measure, a monthly comparison is made of Microtel and digital recorder data. An investigation is made into the reasons for any significant differences between the sets of values..Joint frequency stability wind rose tables of hourly data measured.at the site are generated:

These tables indicate the prevailihg wind direction, wind speed, and stability classes measured during the period of observation as well as the joint frequenciesof occurrence of the wind direction, wind speed, and stability classes.:

The values are also used as input, to the atmospheric transport and diffusion models. Wind direction, wind speed, and stability classes are given in Tables 3t 4, and 5.Murray & Trote4 Inc.

Palatne, finois 60067 (47) 963-_oo0

-I-.Table 3 Wind:Direction Classes IF IF IF IF IF IF IF IF IF IF IF IF IF IF IF IF 348,750 <11.250 <33,750 <56,250 <78.75- <101.250 <123.75' <146.250 <I68.75° <*191.250 <213.756 <236.250 <258,750 <281.25° <303.75. <326.25c, <WD. <WD~WD <WD<WD _WD <WD <WD<WD~WD <WD e- <WD <WD <11f.250 THEN Class is 33.750 THEN Classis 56.250 THEN Class is 78.75' THEN Class is 101.25* THEN Class is 123.75' THEN Class is 146.250 THEN Class is 168.751 THEN Class is 191.25' THEN Class is 213,750 THEN* Class is, 236.250 THEN ;Class Is 258,750 THEN Class is 281.25? THEN Class is 303,750 THEN Class is 326.250 THEN Class is 348.750 THEN Class is N NNE NE ENE E ESE SE SSE S SSW Ssw WSW W WNW NW NNW Table 4 Wind Sgeed Classes.IF 0.0 mph < WS < 0.5mph THEN Class is IF 0. mph < WS. <, 3.5mph THEN Class Is IF 3.5 mph < WM < 7.5 mph THEN Class is IF 7.5 mph < WS 1 12.5 mph THEN Class is, IF 12.5 mph < WS 18.5 mph THEN Class is IF 17 .5&mph < WS _ 24.5 mph THEN Class is IF 24.5 mph < WS, THEN Class is~1 2 3 4 5 6 7 Murray Inc. 60 ft BankDrv, &zteA Palatinelltinois 6oo67 (847)963-9ooo

-a-Table 6 Atmospheria Stabiliiy Classes Differential Temperature Interval Class (in -C/10O0m (1)Differential Temperature Interval (in OF over the 200-33ft rantt (2)0 Differential Temperature Interval (in OF over the.375-33f. rangqe) (2)Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable.Moderately Stable Extremely Stable AT < -4.9-1.9 < AT <--1,7-.37 < AT < -1.5-1.5 < AT <-0.5-0.5 < AT< 1.5 1.5 < AT < 4.0 4,0 < AT AT < -1.8-1.8A< AT. A-16-1.6 < AT-5< -1.4-1.4 < AT< 0. 5-0.5< AT < 1.ý3 1.3< AT< 3,6 3.6 < AT:-3.6&3.2 <-2.9 <4I:0 4 2.8 <7.5 <AT AT AT AT AT AT AT, 5 -3.6 4 -3.2<_ -2.9 4-1.9< 2.6 E. 7.5.LIIor AIS..... 2..41 from At+SIANS 2.5 0) AmSIIANS 2.5 intervals scaled for Instrument heIg!t on the LaSalle meteorological tower& rette4 Inc, 6oo First Bank Dri, SumteA PtalInfe, l.inos 6o67 (847) 963-9oo0 The following two programs were used to calculate doses resulting from radioactive releases: 1.. XOQDOQ: Computer Program for the Meteorological Evaluation of Routine Effluent Releases at Nuclear Power Stations (NUREGICR-291 9), The program is based on the theory that material released to the atmosphere will be normally distributed (Gaussian) about the plume centerline.

A straight-line trajectory is: assumed between the point of release and all receptors.

The program implements the assumptions outlined in Section. C of NRC'Regulatory Guide.1.111. In evaluating routine releases from nuclear power plants, it primariy is designed to, calculate annual relative effluent concentrations, X/Q values and annual average relative deposition, DIQ values.Output from the XOQDOQ program is used as input to the GASPAR program.2. GASPAR 1I:1 A Code System for Evaluation of Radiological Impacts Due to the Release of Radioactive Material to the Atmosphere During Normal Operation of Light Water Reactors(NUREG-0597).

GASPAR. is a program written for the evaluation of radiological impacts due to the release of radioactive material to the atmosphere during normal operation of reactors..

The GASPAR code Implements the radiological impactmodels of NRC Regulatory Guide 1.109, Revision 1, atmospheric releases.

The program is used to estimate the maximum individual doses at selected locations in the vicinity of the plant.0 MUrrLZJ & Trette4 Inc. 600 First Banktrie.

Suige, Palatine, Illitna"'

60067 *(847)* 963-9000 5. Results 5.1 Instrument Maintenance The maintenance program followed during 2014 was composed of routinely scheduled visits, preventative maintenance procedures, and equipment repairs.Routine monthly visits were made to inspect the sensing and recording, systems for;proper operation.

In addition, routine maintenance and calibration checks of all tower-mounted and ground ievel equipment were performed every four months. A description of the calibration and field procedures is found in the Murray and Trettel, Inc. "P1009 Procedures Manual"' (October 20i 3).In May, the annual tower inspection was performed.

In June, the rain gauge was inspected due to lower than expected.

readings.

The gauge was found to be in proper working order.In July, the 33 ft wind direction was replaced due to badreadings.

In October, M&T technicians were on-site in support of an audit by the NRC In November, the uninterruptible power supply failed. A new unit was installed.

Also in November, the digital recorder was unreachable by modem. The unit was rebooted to restore communication, In December, the digital recorder was found with a frozen screen. The unit was rebooted to restore operation.

No other significant problems were encountered wfth the equipment, and at the-end of the annual period, no problems were evident at the site.Murray & Tretel, Inc. 6o First Bank Drhie SuiteA Palatine, liiinois 6 7067 (847)963-9000: 5.2 Data Recovery The record of data recovery for the year is summarized in Table 6.Table 6, LaSalle Site ,Data Raecove umma..2014 Recovered Elevation Hours Measurement.

Wind Speed Wind Speed Wind Speed Wind Direction Wind Direction Wind Direction Ambient Temperature Differential Temperature Differential Temperature Precipitation 33ft.200 ft.375 ft,.33 ft ,200 ft.375 ft.33 ft.200-33 ft.375-33 ft.10 ft, 8750 8750 8745 8722 8751 8751 8751 8751 8751 8687 Recovered Percent 99.9 99.9 99.8 99.8",9.9 99.9.99.9 99.9 99,9 99.2, Lost Hours 10 10, jis 15 38 9 9 9 9 73 Percent Changed 0.0 0.0 0.1 0.9 0.4 0.2 0.3 0.7;1.0 AVERAGE*99.9 4 average of priority parameters (all except precipitation)

Valid Hours Lower Level Joint Frequency

% 8721 Middle Level Joint Frequency

% 8750 Upper Level Joint Frequency

% 8745 Recovered Percent 99.6: 99,9 99.8 Lost.Hours 39 10 15 Murray & Trettel, Inc.

SSUi.eA Jlois 6oo67 (847)963-9ooo 5.3 Summary of Billings for Eguipment Repairs, Replacement Parts, and Other Work not Included in Fixed-Cost Maintenance Aoreement

-2014 Description

-LaSalle Janua '-none- 0.00 February Meteorological equipment maintenance 60.00 Meteorological parts, materials, and contractor services 40.59 March Meteorological parts, materials, and contractor services 35.38 Meteorological parts, materials, and contractor services 358.49 201372014 Heat Lamp Activation 118.80 Meteorological equipment maintenance; 150.00 June Meteorological equipment maintenance 309.44 Meteorological parts, materials, and contractor services 54,67: Meteorological equipment maintenance 955.70 Meteorological parts, materials, and contractor services 61.09 Meteorological parts, materials, and contractor services 38.96 September Meteorological parts, materials, and contractor services 936.16 October Meteorological equipment maintenance 330.00 Meteorological parts, materials, and contractor services 34.03 Special Request 2,185.06 November Meteorological equipment maintenance 528.20 Meteorological parts, materials, and contractor services 194.82 December-none- 0.600 Annual Total: $ 6,451.34 Murray & Trettel, Inc. 6oo First Bank Drive, SudteA Palatine, Illinois 60067 (847) 963-900o0

5.4 Stability

Wind Rose Date The quarterly and annual stability wind roses are given in Tables 7 through 1 Wind.,speed classes have been altered to reflect the sensor threshold.

For the year, vwinds measured at 375 ft. most frequently came from the West-Northwest (1'.06%) and fell into the 12.6-18.5 mph wind:speed class (30.39%)0.

Calms (wind speeds at or below the sensor threshold)

Wer.e.measured 0.02%of the time and speeds: greater than 24.5 mph were measured:

16.29% of the time., Stability based on the 375-33 ft. differential temperature most frequently fell into the neutral classification (52.43%)., Murray* Trette4 Ina,. 6oolirstRankrDrive, PahIcene, Ilinois' 60067 (847)9163-9000o TABLE7 I v-14..LaSalle Cou4nty' 4MI10 5ut~ tatl 0 3'5ý ft. 141 Speed a~itd Dlrectibm January-lareh 2914 375ft-!33ft el~ta-TI F)Vles are. iPercentt 0c~urrerce SPEED -- ------..----.-

~-Wim) ol[LCEmog 0.55....STAOIU'P~

CLASSES ---Eo Nd j N SS MS. ES ýTOTAL CLASS NC;I6 NE CEN f ESE. SE~ 5SE.S 5514 SW 011 4 UW~l flNNW -701.'TAL EU C ~U, 3.52.Ii t~EU Nd t SU N.3jS 0.00 0410 0.00 0410 0.00 0.00 0.o10 0.00 0.00 0.09 04150.009 0. o0 0.0 ,ojo 0.02 0,o00 0,00*.,00 oo Do 0,00 , Oý,1.0.00 0.0 0.09: 0.09 0.0o.o.19041W 0.00 ,0*0 0.00 0100 0' 6 o..00 0,00,:0,00 0.o..05 O100 O.JO 0.40, A410 0 .4 0.05 01.05 0410 O'Go 0.42 ,0.05.0.05 0,00 0,05 019 0.00 0100 (01 00 0410 040 tgo.Do.0 0.00 0,00 0,00 0.00 0.00.0,00 04 00 0.00 0.00 0.00:0. ad: 0.00, 0.00'o.Oo0.*0 00 1.00 as,O 0.09 0.00, 0,0.040 0.0a 0.09 11.05:0.05 0200*0..00 0.00 0,05: 0.32 0.J4 0.1o 0, 011 0. 0 0,M0 0800 0.00 0,00 0.00 0.00 0.00 0,00 0.00 0.00 0,00 0.08 0.00: 0,05:0 0.09 0, OD 0.09 0.05*0.00: 0.00: 0.19+o.05 0.00 0,00 OA,0 ol00 0;00 kouo 0.00 00 0 05 0.00 0.090 0,00 0,00 0,00'0.00o 0.900 0'000 040o 0,05 0O09 0.05 0,05 0,00 0.00 0.09.0,00 11.00 0059 0,o23.0,00 040 0,00 0, 0o 0.00 0n.00 0.10*0.00:0.00 Moio 0,00 0.00: OMOp M00 0.09'0.09 0.00 0.00 0.00 0.00 0.003 0.00 0.00 OXG0 0-40o 0 00 0,00 0. 00.0.00=0.00 0,00 0.00:0 05 0.14 0.D14 0: 05 10,00 0.00 0.09 0.'79.0.37 0.00 0490 0..14 1.07 0.24l 0, 00 0.00 0;OQ: 0.091 0.00 6340 0.05 w,:o 0400;0.00 0,09 0.00 0.74 0.05 0.14 0.09 0.00*0.14 0.09: 0.04 0.00 0.00 0.00 0,00B 04[10 0,00 ooO 0 00 0.00 0o.00 10.5 0.00 0O.: 0.050 0.00 0,00 0.05 0.000.4 0,19 0,,00 0.100 06.00 0. 00 000- 0,00 0.00 DAD0 044O 0..05.0.09 0.14, 0.06 0.00 0,00 0.00 0.37 11.2a0.5.O.00 0. 0 0,0 0.00 0.00 0.00 11,9 0411 0,32 0.019 0100 01.00, 0,o0 4050 0,00 0.00 0.00 0,05 0.00 0.00 0,00 O.00 0.00 0.00 0.00 0..0 011,00 0.00 1.90.1.10 0.,19.'0.05 0o00 0.00 0,0.0,00.09, 0.00'0.00 11,0* 00o. 0.00 Me00 0'.00 0,00 0 01 0.00 0,00o 009 005.Ole00 000 EU I SU 2 ss ES.EU 1, NO 3 S ES 0,0O 0 00 0.00 O,2.8 0.00 0.00 0.00 0.00.0, 00 0.00 0,22 0.05 0,00 0.00 0.00 L18 1.020.00 0.00 0.446 0,00 0.00..0o00 0.00 0.00 0.00'3.25'107 0,145 0.05.0.00 0.00 0.00 0.OIj 0.00 0,00 0,00 0.00 0,05.0'.06 0.00 0 .00 0.00:0,003 0,00'0.00.0.00.'0.00 1,21 O0X0:90 001.0:0,00'.0.00 0.00 0.00 0.00 0410 0.500 0.oo 60.5 0.00,:0.00 o~0 3.7.0,009 1.46 0 00 o0oo 0 00 0,32 0.56 11.00 1.11 Mo00l ar0.0 1 0.00 0.00 2,41 Iii. 6 0o.68 6.2.5i29-0.00.-0,00 0.14 541 0,07 0.60,6,91.227 1,44 Muira fir Trertuk. Inc. 600 Flo Bank iv. ,Suite A. Pd~i,&ue Il~wini 60067 (84?) 963,9000 TABLE 7 continued-15-3 -5 ft. Unhd Speed ard gfrectloq Sow)D ---.-.. -.---. ---------.---

WINd flkwc( ru0 L-SSES danuary-MiircN.

20M 375frt-31Ft Dalra-T (V).... STAILITY CLAS.~b IM ftOIAL CO M11l SO N S2 MS FS TOTAL 0 00 0.a0 0.00 3.110 6 00 0.06 0.19 0-16 CtlASS N fili NE EK"E ES E SEý SSE,-S SSW SW WS~W Wl 1WI Elf I MU 2 SS ES T SO 14 2 55 4 rS ES 0.00 D.37'0,05 0.00 1.00 mo3 0.00 0.83 0.00 0.00 0.00 0.00 0.14 0.65 0.60 0,05 0.04 mo o 0.00 0,.10 0,00 0.00 0.60 9104.0,05 0,00 0.00 0100 0.00 0.00 1.02 0.00 0.00 0.00 0100: 0..00.0.00 0.00 0,09 0,00 0,97 0Mg 0M05 0.09 0 00 0.05 0,00 0,09 mo~0,00 0,19 0, 08 D.09 0.09 9 00 0.00 0,0 0,19 0M5 0,00 0,00 0,00 0,00 M6 o 19 0,09 0 00 0;00 0.,00 0.00 0.47 0.19 0.00 0Lao.ý00 0,00 0,G0 0.51:0.09 0.00 0,32: 0.05 0.00 60,00 0, 00 0.00 0.51 0.56 0. 4 0.14 0,160 0.00 0,05 L.34.Z.B4 2,50 1),37 0,09 Olga 0;000.317 0,00 0..14 0,09: 0 14 0,00 0.00., 0,00: 0.88 1.44 0.00 0,00 0,00 0,?0 0 14: 0,09 0.00 0,00: 0,00 1.30 0,51 0.00 0 11 0 80 0.90 0, 4z'0.3Z 0;00 0-00 0,0(0,93 0.93 0.00 0,00 0,00.0,05 0,%7 0.00'0,00 0,00 0.00 1.02 0.23.0,00 0 00 0,00 0,0-5 2,123 6ý09 0,00 0.00 M.00 1.53 0,06 0. 00: 0.00 1.21 0.113 0,65 0,00 0A0 D, 09 1.30 0.70 0.00 0.00 0.00 1,76 0.28.0,00 0.00 0.31 8.00 oPo 0.00 6001 0.28 12,93 7.00 2,78 0,51 0.00 0.0.00 0.19 11.60 13.07 2.01 0,09 12.93 0.00 O.00 0,09 0.00 0.00.0,000.00 0.05 0.00 Mu0 0,00 119i 0.09 27~3.TOT 6.35 3.43: -1.9 3,94 1.,81 2,48 3.01 MO99, 9.92 O.6. 7,14 5.80 9.321.261.02 6,2.510.000 0400 OX 0.7 S1.65 34.21 10o11 2.7 100.M, Wihd Direction by Stabit11t6y N MlE" NE E ESE SE SSE S SSW S14 KIW W 6WW0 NW IMW TOTAL 0.00 0.00 4.73 0,93 0,42 0120 0.00 0,A4 0,09 0-30 0.32 0.09 0.00 0.05 0.14 2.97.6.14 0.05 0.00.0.00 0,09 0.93 (1.14 0.00 0.00 0.00 0,00 0,70'0.74..0,12*0.05 0,00 11.00 0.00 1.21 0.-93 0.28" 0,05 0.00 0.00 0.05 1. 44 0.93 0.42 0.19 0.00 0,00 0.00 1-9 1-21 0.32 0,.51 0.00 0.00 3.76.3185 1.10 0.74 0.00*0.14: 2.: 2A5 1.21 0.37 0,00 0.00 0.00 2,.83 1.11 0.28 0.00 0,00 0.00 2.4L 0,97 0.00.0.00 0.00 0.05 4.31 3M0 1,11 0,05*0.00 0400.0.05 7.51 Q.0 0.00 D-00: 0.09 3 11.0,90 0,05, 0.00" 0.100 0.00 4.36 1L11 0.19 0.00'0. 19 51.65 340 1!-ST~A81L1T CL.ASSES-Extrewley Unstable lWderately Unstable Sligh Itly Unstable lReutral Sllohtly $table lfoderately Stable Extiwly Stable Wind Direction by Wi .Speed nNN~E- NE ENE, E 9E SE S$E. S SSW SW WS(J P I WA NNO' TOTAL.0.09 0.56 0.74 1.99 2.13 0.63 0.00 0.09 0.46 0.93 q,31 t193 0.19 0.00 0-00 0,23 0.741 0,97 0.97 1,0:1 0,09.0,4.0.09 601°0 0,04 0.23.0.42.0,65: 0.42 M.05 0.000.2;0.70 0.56 0.40 0.00'0.05 0.23 0.70 0170 0.74 0.60 0,00.0.14 0,19 0,93 1.16 0m00 0.05 017 1. 39 2.41 4A63 0.00 00 9 6.29 0.74 1.148 0,3, 3.20'0.00 0.19 0M28 0,79.1,76 0.93 3120 0,00 0.32 0,60 1,25 1-.25 2-32 0.00 0.05 0.14 0.83-3.43, 2.236 2.64, 0. 9 0.53 3.01 5.Sd 0.00 a.05 0.60 1,90 4.60 7.69: 0.00: 0M5 0.42 1.44 1L.75 2.23.0.ý37;0.00 1,11 5.29 14,23 27,91 23,78'27,68-WiWO SPEED OLASSES-: CALM 3.6 7 ,5 186 24.85 24.5 41uh Mum* a& Tiette Inc. 600 F! it Ban Mve, SuiteA Maadne. IU~naol 60067 (87963.9000<

TABLE 8-18-LaSaille Cou ty Geeratt~ng Statfu 375 ft. Wind Spud~ 6wd Olroctjcrw.Aprll-JUne.

201.4'375Ft lIFt 0eIt~.-T ~F~)"er(1t'of Onser'vatfons

-28 VaNue 60.e Percet Occurrence SPEED -----. ... --.-- WIN[)OIF.Ecll0oN CLASSES STMUP1T CLASS a CUASS' 4 -ME NE ENE E ESE SE SSE, S $Su Sw: WSW IO (0TAL 0) MU SU" R1 SS 1s1.5 ES TOTA'Ev C Su A 11 HIS ES'M S 0.00 o,00: 0.00.0,00 CI 00 0.00 o on*0.27 0.05 0.00 0.00 0,00 0.07.0.:32-0,00 0.00 o:.no 0,00 OXO0 0.00, 0,30 0; 00 0,00'0.00 0.000,00 1.00 0.23 0.09.0.00.0,68 0.00 0.00 0.09 0.00'1.01'0.0k.0.00 0.00 0.00. 0.00 0.00 6.00:0,00. 0.,00 0,0 0 0.00 0.00o:0.00 o.o0 0.00I 0.41 0.09 0.00.0.00 0.50 0.90 0.33'0.05 04,00: PAO0.0,00.0,o0 0.60 0.04 0,00 QO0o0,o 0.00 0,00 t0,,.00 0 ,00 0.00 0 00 0: 00'0.41 M.5 0,; 05 1.14 0.00 0.00-'0,0o 0.82 0 00 0.00 0400 0,00 0.00 0,.00 0.00: 0.05 0 00 0,'08 0.00 0,68 0 110 0.004 0,00 0.00 0...00 0m23 0.14 0.00'0,0. o.131 0 41 0,00 0,00: 0,00*0,.00 0.00*0.00 710 0.00 40.00 0.00 0.00 0.3 0.0o 0.00: 0,.00 0.0 70 0,14: AG0 doI'): 90.00 0,00 0.00 0.00 0.00 Do00 R0.0.00 0.00 0.o0 0.60'0.06 0-00 0,00 0.00: 0.160 0.00t0,0o U.'37 0.00 0.00 0is'0.00*0.00'0.00 0,00 0.00 0.00 0.00 .9.00o 0.00 0.00 0100 0.O0;0.0 0.00 0.00 0.00 0.00 0.00 0.00 0,00 a.00 0.00 0.00 0.00 80.0 G 0.00 0.00 0,oo 0,00 0:,00 0.00 0.00 0..00 0.100 0.18 0.19 0.0 0.0o a0,1 0.0 o0 0,00'0.00 0.06 0,050 0.041 0.0.0..00.00o 0.00 0,00 0.o5 0;ý?3 034 0.o0 0.00 0.:00 1.51 0.73 0.23 0A0.0.00 0.00 0.0o 0.00 0,00 0.00 0,00.0.30 0,00 0,00 0'.00 0,00.0,65 0.00 0.00 0.00 0;00 0.00 0,00 0.05 o'1.83 o0o5S o0.00 0.08o 0.00 0100 0-00 0.00 ,0.00 0.00 6.00 0,050 0.00 M.08 0041 0.00 0.,00.0.00 0.08 0,127 0.05.I..oo1 0.57.0o.00 0. 0 0.00 0.09 0.00 0.80.0.00 0.00 0400 0.00 0.00:0.00 0.00 0.o0 0.00 O0, 0. M0: 0. t 0.00.0,o0 0.T0 0110 0.00 0. 8 0,00 0,07 0.00 0.00 0;o3 o0.0 o.00 0..05 0..00 0.00 0232 0;,3 0,.00 0.00 0.00 0.07 0.07'0.00 105'0.00 0m0a 0.00o OA0.0o no 0,00 0600 D0.00 0.00 0.00 6.00:0 00 0.00 0.21 0.00'0.00 0.00:0.00;0..07.0.o 0.10 0,.00 0.09 0.000..00 0.05.0.00 0.00'COO 0.00 0.i00: 0,14 0.00 to,0 0.0o.0.00 0.37 0.09 6,00 0.65.0.00.404 1(.7 0.37 O 0.09 moo 0,00 ME14 0. 09.Z 0,00 441;005 0.00: 4140' .1.74 0237.OD 03 0.04 EU NJ.8 Su HMS ES, ES 0,14 0,00.0.0 04.0 0,00 0.00 0,00 0.65 0.0900 0.00.,0,o0,oo 0 1o 0.55 0", 69 190oo 3.48 32,37'Mwwzy 6 Treztel, Lrn2~. 500 FJ%,z B.mk D~1ve~ SuLreA Pa1atin~, Illinois 60065 *(84~9 963.9000 munay 6? Trdrtet'lnrý 660BvtBxANoqSulrzA Pakfimlllinois 60067 (647)963-9000 TABLE 8 continued-17-LaSalle County fieneratir.)

Statlo 3755 ft. Wind Speed ard Dlirection.

AgriIl -Juhe., 2D14'375Rt33lft, Celta-4, (F)0---- ---------

WIND 0IREI IJCl0 CLASSES ....TABILIT; CLASSES ----------

Fl U W I NO 56 S$ ES, IOTA CLASS N NNE NE ENE~t ESE SE s~E 5ST5 SW WSW: W WNW N1 M*W TOMA EU 9 SO 2 SS ES iT 50 2 St o DO 0,00 0.03)0.55.0,18 0.09 8. GO 0.100 0,0 .0 0,00 0.00.0. 55 0,00 0,00 0.00 0.00 V 18.0.05 0.00 0,00 O 310 0.00 0.09 oQoa.9,00 0.00 D, 0.0 0,00 0.14 0. 0 U12, 0,32, 0,00 0.00D 0.00 0,00 0,14 0, M0.0.00 01.05 0.,00 224: 0, 02: 0. 00, 0.05 0 ..14 0.87~MO~z 0.00 0.00 0,00 0,00 0..0i 0.55 0.690. 00'0.05 0,05 0.96 0.00 0.00;0.00 0.00 0. 18 0.09: 0.00 0.00 0,00 0.27.0,09 0,00 0,00 0,00 0.23 o.031 0,00 0.00,:0,10 0,14 0.23 0.00: oý 00.0,00 0,.75-0.00 03.14 11,73 0,18 0.05 0.,00 0.03 0. GS 0&00 0. O 1,69 0,00 0.00 0,00'0,0W 0.82, 1,60 0;23 D0OS.0,00 0.05 0.1115 0,00.0,78 1.14 0.27 0.09 0,051 0,14, 1,05 1.05 0160 01.14 0.00f 0; 05 0.96 0.27 DIOS: 0,00 0.00 0,3;0.41.0i 05 0,05.0.110 0,05 0,14 I .10 0187 0100 0,05 0,00 0,09 0 46 0.00 0.00 0,00 0,00 0,50 0,05 000P 0. o9 0,00:0,21 0.61 0.37 0Q 00 0,00 01,00 0,00 0,00 0.05 0.00 0.00 0.00 0.41 0.14 0.00 0,00.0.00 0.00 0,00 0.64 0.00 aJ. O 0,00 0,00 0,05 0, 00 OO0 0,00 4.00 0.00{O0M 0.00'1.24 0.50 0.14 0.001 OmO 0,00 0.,0 0.09 0:00 0165 0.05 0,23 0,37'12,41 9,25.2.06 0,1 0,2- 0.27 0.23 L65 5.77 i-92 0.2v 0.23:037%.25 0.38 24,54 0. 23'0,73, 1 92.0.22 2.6: 05 TOT, 3,34 3.07 4.%5 9,66 7.88 4.26: 4,U1 6,0: 9.80 8.88 7.05 6.87 6.32: 6,04 5,36 5,63 ý9,95 0-12 0,60 1 60 55;7 3fl7 , 9.7 1.42 M9.95 WIMd I1vr'petion by Stability' Il N348 HE ENE E ESE SW SSE S -M3. 54.Z~W Vl WNW NW NW T61AL.0.00 0.00*0'. 2.24 0.07.0100 0.00 0,00', 0.00 2,Z9 0.69 0.14 0,00 ,0.14 0.00.3,30 0.09 0.00 0.09 0.23 6.73 224 0.05 0.00 0.09 0.,9.0'.14, 3:.34'0,21 0.001 0.00 0.00`0.00 1.79 1.,42.1,05 0,00 0.00 0,00-1.680,9OZ.0'14 0 00'0.00 0.14 2.84 1.47 0T18 D.00 3000 6A¢0.14 4.08 3, 3, 1,79 0,27 0.00 0U09 0,18 4.12 3.16 1.05 0'. 2?0,00 0,0 4,03 2,15 0.2!0,64.0.05 0.05 0,27 1.21 0.14 0.18 0.09 0.3Z f.17 I.,60'0.14 0,00 OM 0 0.00 3.53 1.60 0.55 0.00 0.00-U .00" 1.69i 0.69 0.00 0.00 0.00 0,05 3.80 O,,-0 0,00.0,32 0.60 55.72:30A 9A.7-STA81L17Y CLASSES-Extrmeli :nstable;KoderatelY.

Unstable Slightly Unstable Neutral Slightly Stable Moderately stable Stable-Wwd Direction by WIrn Speed N WN NE ENE E LEE SE SSE 5. .55 SW at5 4 MIN' Wd 3314 TOITAL 0.00 0.00 1,;M v.87 0. 05 0.00 0.06, o0o0, o.92 1:'14 0.23 0.09 0.00 0.05 01,55 1.ý05 1,08 1l.28 OM1 0.00 0.00 0.6);1.08 2.10 3.36.1.10 0.00 0.00 06.55 1.97 134 1.51 2..]]0.0 0,14 0.73.1.74 0,60.1-01.0,00 0 100.0.41 0.78 2.01 0.35 Mýa 0400 0,10 11.19 1L60.1J.2 2-29 0.00 0.00 0.37 2.44 2.34 2.75 0.00 0.00 0.32'0. 37 2.34 2.34 3.02 0.00 0" 05 fOM 0.95 9.52 2.15 0.87 0,00 O.00 1.06 0.64.o 00 0,05..4,41 11.01 1.83 1-65 1,37 0.00 0.05 0,27 J1.14 2.060.00 0.00 0.00 0.18.01.6 0118.1.42 D.;3 2. 29 1.38 1.3.4 1.85 0.045 O.!'7 Q.05 0.41 6,64 M909 32.31 16J65 441IN0 SPEED CLASSES-CALM.~3.5g 7..6 M.- 12,5 12.6 10.5 18.6 -24.5 24,5mp Munrty e Trettk Inc.. 600 Fin; Bank Dnva, SuirceA P4Iadne, lfihnos 60067~ (847) 96.3-9000, TABLE 9-18-.37iý ft. Wind' Spe~ wd ad Wettlon 375FG13t aetaer, 5014 Ntkjitr:,of 0Uservaionws

-220j.Values ame Pautet Odcurrer~ce

-. ~ WINO. OIRECT.104 cLA5S~ES ~---CMý~ N UNE RE Sill STAB1L1Tr.CLASýSES Eb 1(0 so N SS E4 TOTAL t O~E St SSE 5 SSW V,4JSI ws w 0 1V, -If 01AL L.SS Es.0,.00 0.00 0.00,'0.00..0,o 06.00 0.00 00 0.00 0.00 m.0.0,00 0100 0.00 0.00 OAGO 0; 00 0,00 0.oo 0.00 0,00 0.00.0160 0,00 M.00 0.00 0.00 0 C0 0.00 0,0o 0.00'0.00.0.00 0.85 0,05.Ma0 0Ma 0,001 ala0 O.QM 0,00 0.005O 0,A0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00: 0,00 0.0 0.0o, 0a.0o 0.00 0.,0 0.00 0o00 0.00 0130 0.00 0.00.0.00.0,00 t do0 0.00 0,00.0.00 0.00.00 0.00: 0,00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 ma0 0,00 13.00 0, D0 oi, GO 0,00 0.00, 0,00 0.00 0.00 0o8o 0.00 0 00 0,00 mo~0.00 0.600 o. O 0400 0.00 0 00 0.00 0,00*E 0.00,.1 2(1. 0.00 0.05 15 0.09, ES 0.011 4 So 0.00 N .127: 7 SS 0.13 E5 0.0 ES 0.00 mu 0,00 AMU 0.00 H 1.27 Is 0.0Do.0,00 013 0.00 030A 0.00 0.00 Aovo .t0od 014: 0,05 0.05 0.05.00q 0.0:0o m~a ~Om 0m0o 0.00. 0.00 o.4o0 0.00 0A0 0, 54 0.0o1 0.2o 0.05 0,00.0.O0 0.00 0.00 0.00 0.00 0.00 0.0OD 0. 05'0.63: 091 0;27 0.41 0.14 60.01 0.010 0.00 Q, DO 0,00.0105 0.00, 0.00 0.00 0;.00.0.00 0.ý14, 4.05 0.00 0.00 0.05ý0.00W um. 0.00 0,0p1 MO, 0.00 0,001 0.05l 0.00 0.0 0.0A 0.00 0.00 0.00 0.23 0.27 0*.00 0 0,00 0.00 0 10 0100.00 0.00;0.59 0 i13 1.50:0a,23, .0.18 .0.800 0105 d14 0.00 0.D0 0,00 0.00: 0.00 0,81 0.18 0,05 ff, 00 00 0,54 0. 21 0, 5ý1 0,00 0:00i 0.46 0.14 0-00 0.00 O.o0-6023, 0.50.0o, 0.14 0,00 0.00 0.105.0;.41 0 68, 0,63 0.00.000: 0.00: 0,50 0,23 0,00 0.00 0,95 M.3 0,60 0,32 0.00 0.00o 0.00 0.23: 0,o0 0k72 0.54, 0.o00 0,00 0.0 0.06 k,72 0,.68 0,14 O.09 40,50 0. 2 0.05 0.,09 0,00 t00 o.011 0.14 01.35 i-oo 0.50 L,63 1.18 0.60 Q,,14 0.10 0.00 0.00 0100 0.05 0.00 0..05 0.00 0.00 0.0(3 016 0.0?0.05 1,04 0,68 0; 36 0.14 0.0a 0.015.0.91 0.00 0;00'0'00 0.00 0.09.0.05 0.05 0.00 6.00 O.Mt 0100 0,539 0,08 0 14-0.00 0,86 0.32 0.60 0.0X o mo 0,00 0.;00 0.95 0.63 0,14.0,00. oo0 0.00q 0.00 0,09 0,05, 0.05 0.00 0.05 1.00 0,00 .0.0o, 0.00 0.00 0~s,0o0 00 O.81 0.45 0.,1 0.41 0,05 0,04 0,00 .0o 0.18 0,a 0,95 Z.06 0.64. 0.41 0150 0,36.0.1 0,805.o0p0 0.00 9000, 0.00 0.00 0.00 0.54 0.14 0.0b 0.09-0.00 0.00 0.09 0.05 0.00 0,00 0,00: 0.27 0.09-4. t0 0,00' 0.00V 0.00 0,00, 1.09 1,04.0.54-0.14 0,00 C.oo o,.0o 3.17 2.,67 0.63. 0 00 0.00 1.09 0. 0q 0.05 10.05 3A7a 2:67.0.63 OA 0*0.0,0 0.0 Io 1 00'0,00 0.,0 0.00 0.00 0.00 0.63,.1 04 0.54 0 .o0 0.63 14 67, 0.01 6.23 0.05 EU IESf o.00 0,00 0.0 :, 0.05 1.49 D'S5 0.50 0,45 000 0.00 0.00 0.00 1,49 ,64~O3.0 0. o M.4 1.00ý0.00 0,00 0.00 0z 63 U0.00 9ý O0 0,00 0,00 0.005 0.77 Q.2K 0.600 0.,00 0.05 0,59-0.127 0,00: 0.32 0.59 0,12 0.00 0.05, 0.00 0.45. 00A:oso, o.,'0.14 -0.72 0.00 Q.0.0 oA4'0.32 0.14 0,4 Odie 0.00 0.60 0.31 1V.d5 0.09.14,67 6134 1.50 1.5a 0.00 o 0.00 1I27 13.603 u.10 5.93a 5.9l 29.56 6..34 0,05 t v 1'4 6,7 8.70 1L95 Mwy&Trayet la, 1=60 mt Btk Mv, vSuit. A ?afadnu,Mllnwi 6OS7d (847963.9000 TABLE 9 continued~.19.osoille county (-;eneratlngStatlo 37ift, wind Speed ar'd pirect1m)july~-sootater.

2014 SPEEDJ ------- -------- WI. 0 DMEC16CIC CLASSES'-

--w-- e-------STABILITY CLASSES CLASS 4 NNE NE ENE E ISE, SC ShF S S$4 SW: V3W W NNWH W NNWJUTTAL EU M) SU l S5 M F5 TOTAL IEU 9 SU 2,5 ES UMJ 2 SS 4 HS ES 0.00 0.09 0,09 0, 27 0.00 0.00.0.00 0,.00 0, 0o 0,00 o0.0 0,09 0.14ýI.oo 0.00 0.00 0.00 0.00 0,00 0,00 0,00 0.27 0.05 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0,00 01.00 0.27 0.00 0,00 0.00.o,00 0.00 0,00 0,00 0;00 0.00 0 0M 0 72 0.00 0.06 0.00 0.00 0.14 M.O0 0,00 0.011 0Y.00 0.73 o0.2 0,00 0,00 0.00 0.00 0,00 O.ý0 0,09 0.00 0.0 0.00 0.05 0.,00 11 00 0,0 0.00 0. 011 0.05 0.23 o,23 0,00 0,00 0.00 0,010 0:05 0.00 0, DO 0.00 0.00 0.05 0.45 0'.00 0,00 0.10 o010 0 14 0. 0Q 0130 0.05 0.27'6,23 11.00 0.00 0.00 0.09 0,3.0.66 0,00 0.00 D.,77 1,00 0.00 0,04 0.00 0.00 0.14 0,27 ULS 0,.00 0.00 0.0d 0.41 0377 0o.05 OMO 0.00 0.00 0,00 0.14.o0.0 0,00 G.aa.0.00 012 0.14 0.00 0.00 0,10 0.00 0.00 0.00 0.00 0.09 0.8 0,36.0.090 0.00, 0.00 0.32 0.14 0.00 00A0 0.00 0,00 0,16 1 .22 0.18 0.00 0.00 0,00 0.00, 0,o00 o,;00 0O00 0.00 0,00 0.71 0,05 0.14 0.00 0.14 0.00~0.00 01o10. 0,60 0.99 0,50 6,.61ý3.03: 0,18 0,00 0,00 0,00: 0.011.1.45 1.27.0.59 0,00 0 09, als0 6161, M6.07 0,.0 0.00 1.46*L~7 0.00 0.00 TOT ,07 3.716 4.B9 4,80 5.16 3,44. 5.02 5.89 8.92 9.731 B.42 679 WIZ4 8.47 7.74 4.48 99.95 0,00 0.14. 2.44 46 5. 2? 21 9.I0 4,48 99.95 Wifd afrection by Stobilii}:

N ONE HIE ENE E ESE -SE' SSE S SSW1 5W QW W WNW MONNW TOTAL 0.00.0119.4.35 1.13 0.32 mo.0 0,00 2.26 L09 0.36 0.00 0,00 0.00.0,09 3.40 1 131 0.09 0.00 0.00 ,0.00 0.80 0.00 0-.14 0.00 IM94 2,17 1.6j 1.771.22 0.0o 0.0o o,06, 0,00 0.00 1.,27, 0.77 1.27 0.14 0.00 0.00 10.05 1.11J 1.22 1,58 0.86 0.00 0.00 0.00 1.72 1.36.t.95 0.861 0.00 0.00 0.09 2.40 13.0 0 ,69 0.00.0.00 0.27 3.40 3.17 2.31 0.54:, 0.00 0.00 0. 09 2.67 1.72 0,41 0.00 0.00 0.00 2.50 2.31 0,41;'0.00 0,00 0,54 2.90 1.63 0'.23 0.00 0.o5 0.72 4.44 1.81 1.40 M.O0 0.00 0.00 0. 23 4.10 1.95 1,13 O.14 0.00 0.00 0.00 2.85 1.00 0.41 0.23 0.00 0.14 2.44.46.58 21.21 19-10 4.48-STAIJ1LMT CLSES-Exttieoly 7 U st~ble'l'oderately UnstaIble Slightly Unstable Nleutral Slightly Stable ModeratellY Stablo Extr~ewy 6table, Wind DirectJion by, Wi1nd Speed N NINE NE M. E ESE SE~ SSE S 55W SRJ WS W MI~ NW NNW TOTAL-WINDl SPEEB CLASSES-0.00 0.00 0,,00 0.00 0.00: 0.18 0.23 0. ? 0.05 0.09 1.5.1 1.00 0G81 6.7Z 0,816r ,0 4 1;36 15 7 1,0,+-!2.26, 1.22 2.13 1.9f 1.72.O.50 0.27 o0.312 127 L~0.00 0.00 0.0 0.00 0.14 0.00 0.00 0.00 0.0, B 0.0o, 00 ._.tl 11.R 0 0 00 0.00 0.05 0.09:0.36 1,31 1.18 6,50, 0.00 0.32 0.05 01M 1.00 1. 2,17 2.08 2.13 0.05, 1150 0.05 d. 05 0,05 0.54, 0.09 0.18 1.40 2.81 3.50 1.22'2.72 3M0 1 31 0.61M 1.45 2.26 1.77 0.45 1.36 217.1-71 V,22 0.14 0.36'1.22 2.31, 0A2 0:32 0.09 1.81.212?0.45.0.09 0377 2,67 2,17 0,41 0.14 0,80.0o6, 1:13 1.27 M.4 2.81 16,57 29MSG 31.60 16,07 3.zD CAL H< 3.53ýi Z36 ; 7.~p 7.6i 12.5 12 6 -518.65 18.6 24M. 5 24A5 Mmy Twerte4 Ine- 600 Fiat Bank. Ow~, Suite A Poada~ne, Ilw15 60067 (8471 963.9000 TABLE 10-20-LaSalle County Cerieratino S~atio.3.5 ftrc.S widspe nd oleactim Octte-Dtceriter.

201A 3751`-OOft Pelt0i-T (F)Ntift1~r of Observat1ions

-2191 Values are Percent Occurrence SPEED -------- ------ -WIND DIRECTIO9 CLASSES UMASS N NNE HE ENE E ESE SE OSE S SSN N NW Nt 1,5W W tM W P1Nw 10TAL-STAOIL]IT CLASSES-------

EU. w 1 N SS: HS ES BO 000, 00 o EU V. su IS EU-NMl 1 so-4 3 S5 NS5 ES 0,00 0.o0 0.00 0.00 MO.0 0.00 0,00.0.110 0.00 0.00 0f.U0 0,00 0 O0 0.00 0 00 0,00 0.00 OMD 0.00 0.00 0.00 a.0.00 0.00 0,00 0,00 0,00 O3D0.o0o0 0.00 0,04 0,00 0.00 0.00: 0,00 0.00 11,00 0,00 0.600 0,00 OM O.Do 0,00 v. 00 0.00 0 G0 0 00 0 n0 0,00 0M3 0.00 OO. 0.00 0o10 0,00 0.05 M0.0,00 0, Dr, 0,05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 00 0, o,0 0.09 U.J9.0,00 0.00 0..A 0.60 0,0O 0.00 0,00 0.00 0.00 0.00 0,05 0,00 0.00 0.00 0*,G0 0.00 0.00a o,00 0.00 0.00 0,00 0,00 00 0. 0,00 6414 0.18 0,14. 0.00 0,95 0A35 0.00 0.00 0,00 0.00*0.00 0,00 0 60 0.o0 0.00 0.00 0.00 0.18 0.10 0.05 0.00 0,00 0,.00.000 0,05 0,00 0,00 0-00 0.32 0,05 0,60 0,0.0 0.00 9210 0.00 0 00.0.09 0.00 0.00 0.00 0,09 0.00 U,0, 0,00 0.00 0,18 o.o0 0.05 0,00 0,00 0.00 0 00 0.100 0.00 0,00 0.00 moo 0.00 0,00 0,130 0.00 0,00 0.00 0.00 0,00 0,00 0 00 0.100 0,00 0,00 0.00 0.ai 0.00 0 a10 0.00 0 00 0.00*0,00.0,006 0.00 0.ý00 0.18 0.14 0.05 0.00 0,00 0.00 0,00 0.,00 a 00 0.00 0,00 0.00 0,00 0,09 0,00 0O.0 0.00 0,130 0,14 0.00: 0.00.0.00 0.00 0,o0 0,09 0.00 0800 0,00 0,41 0.23 0.00 U-00.0.90 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.217 0D.2 0.O0 0,00 0.00 O, O0 0.00 0,00 0.00 Q.061 0. 00.0.36 0,14: 0.00 0.00 0,00 0.00*0.00 0.00 0.00 0.00 0,00 0.00 0,00 0.09 0.05 0.00 0.00 0.00 0,00 0,18 0,18 0,100 Q.00 0,00 0,00 0,00 (1,09 Uo~0 00 0.00 O.m1 0.00 DIU: 0,00 0.00 0,00 0,00 O0 0,00 0,00 0,.00 0.00 0 00 0.00 O0.0 0.00 0 n0 0.00 0,00 0.00 0,0A 0.14 0.o0 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0,00 0,00 0.00: 0.00 0.05 0.00 0,00 0,.00 0.00 0.09 023 0.00 0,00 0.00 0.00 0.00, 0.00 0.M6 0,14 9,60 Ma0.00 0.00 o.00 0.00 0.00 04.62 2.28 0,46ý0.00 0,00.0100 O.50 0136 0.14 0.00 1011 EU I S 2 11ý3SU 1 SS Es 0,00.0.00=0 00 0,18.0.20 0.09 0.00 0.00 0.00 0.00 1,05 0.55 0.00 0,000.00 0,14 0,00 0 g0 0.00 2.48 0,00 6.01 0.00 0.00.0.00 0.00 1.23 0.27 0.00 0.00 0.00 O.ý9 0 00.O0O0 0100 0.00 0,3r 0.41 0.05 0.00 0.00 0.00 0.90 0664 0,40-0.18 0M00 0,00 0.00 0.55 0.55 O, 4 0.00 MOOý0.00 0104:0;23 0.00 0.110 0.00 0.00 0100.0,41 0,09 0,07 0,00 0.09 0,09 0.27 0.00 Q.00 O.0 0.00: 0.00 0.32 0,15 0.05 0.00 0.00 0.00 0.60 0.23 9.0O 000 0 00 0.00 0.09 0.23 0,14 0,00 0.00 0.00 0.00 0.64 0.41 0.14 0.0a 0.00 o.O0 0.2 7 0.46 0,.05 0700 0.00 0.00 0.00 0,46 0.69 0.09 0.00 0.00 0'..00 0,23 0.00 0.00 0,00 0.00 1 55 o: 82, 0.02 MS 0 0,00 0.00.0.00 0.68 0.46 0,o8 0.10 0,00 0.00 0.09 0.00 0.00 0,00 0.00 1.37 1.35 0,14.0.05 9.00 0.00 0.96 1.00 0.23: 0.05 U.00 0-00 0.00 0.12 0.23 0.05 0.00 M0.0 0.00 1,18 00;0 0 .0 0.00 0,00 0.00 0.86 0.32 0.00 OAO0 10,9 0,59 0,04 0,00, 0.0 , 0.00 0;71 0:64 0.12 0,00 0.00 0.00.0.00 1,46 0.91 0,05 0.00 0.00 0,00 0.00 1.00 0,50 0.00 0,00 0.00 0.00 1.78 0.36 0,00 0.00.OA 0,00 1.23 0.32 0.05.0,00 0,00 0,00 0.00 L.82 0.27 0.00, 0.O0 0.00 0.00 0.00 0.00 11,38 5.96 1.27 0.09 0,00 0.00 0,00 0.00 17,89 9.06 2.37 0.32 0 00 0,00 11.,3z 5.g6 1.27 8.7137 0.00 0.00 11.S9 9.06 11.32 Murray & Tyel:U4 mt= 600 Fiato Ba&Dmk Dv SuireA Pal~mdwC,1 fliri3 60067 (847) 96396000 TABLE 10 conUnued.-21-L~aSalle CoufftyQvarotlngvStatio 37t fi, Wiiq0 Spee and Direction Odcter'4)ecaber', 2014 SPEED .... .-7--------

Qno0liZErTI0,v.CAM

------------ STABILIVi'CLASSMS'-

FU iu SU, t* 5S j5 Ea. T0A CLAS II INN HE MiE' E ESE SE wOS -5 W'~4s w Aw W' aftNTOTAL 9 U 10w 9 Sq N.2SS 4 MS ES'1.0a 0.73.0,01 0,00 0.A 0.00 oa. o.Q.65 6.05: o' w 0,100 6,00.05: 0.00 o.oo0 0,00'0,.00.0.00 6.00 0.00 0.00, 0.00 0,00 0.00 0100 6.000.00 0,00:0,00.L0.0 o0'G.0 000 ,0 0.00.0.00 0.14 q. 05 ma0 0.00 0.23 0,23 0.32 0.00 0.00 0; 41 0,01: 0,00 0.00 0.27 0J40 0.00 clu0 1340 0,00: 0.64'd, 14 0.00]0.00: 0.18, 0.00 0.14 0,00, 0,00 Q 00, 0" up 0.96 0 -u, D0 14 07'1.4 0 09 o:05.0.00 0;00-6.s6 6,,55..1.(4 1,12, 0.-I 0,32.0.05 0.00 0800 040: 0 00 1,91 1 00 0.23 0,0 10 1.D.00:0,00:0,00.-3.73 0 ý00* O .06 0,00.o.9"e 0.14 1 0;00 014ý0.14}0.00.0.0a 0.00, 0136 0,00, 0.00 0,08o 0 23 M0,4 0,00 0.00 11.un, 0.00*0105 0.09.0100 0.00 0,00.0,00 10.38,.2.23, 0.00 0,00 0.00 8.9Z 7,46. 0;14 0.09 0 00 13.84 223: 7. 04 ooo. .0,00 o'a0.0 0.0 0.00, 0.00 0,00 0.00 O.00 0,00 0,00 0.a 0.00 0.00 0.j00 0.05, 0U00 0.00, 0 00 o"00 0.00 0.00 DAO 0.50 LbS 0,18 0.011 0;00 0,00..0,02'2.'8?Q1.00 0,00 0},400.00 0141 0. 64 0,27 C{OO 0,00, 0.00 0.00 0.00 0.00, 0.00 0.09.2.2a'3 0.41- 0.55;0,05 0.18-Qý00.0; Do.0 0,00]'0,o0.892 7 !1 09 0.14 TOT 5.23 22,14: 2.59 J 96 .1,Al 3.02 4'.X 4.63 8.03. !L92* 8:92 6.24 1024 IS.60 7,06 6.0 100..00 0.110 0.00 0. 00u,03,5 5 .4 100.00 4W~n Wiettion by'Stablilty' N NNE NE ENE,~ E ESE SE SSE 5 55W SW WSW, H WNW NW4 NNW4 TOTAL 0.00 0.00:.0.00.4.A5 0,93.0,2J D.00'0.00 (1.00*0.00: Zý 05 0.96 0,14: 0;00 0,00 0.00.0, o 1.i8 0.27 0,00 0.00 0.00, 0:00'0.91 0,0o 0.10.0.i00a. 000.0.00 0.00 0,60 0.00 0,60 1Low 0,21 0, t4 O,00 0(.0 0.00: 0..00'1-.14 1,23: OW5 0.36 d.o;0.00 0.00 0.6 I. 35 0100 (1.00.4.14 M.46 0, 14 0;0o, 0.00.0"00, S.'19'6,U 0,09.: 0,00 0.06 0,00 4,01 3.A1 0 8,2 60.00 .0o0 :.000.09"0 40, 2.46 S.A5 10. 19 3.10,0 2.59 4.61..0.5a 1.09 0.86 i'U00 0,40 U.00 0.00 0.00.0.00 5.51.0.23 0.00 0.00 0,00: 0.00: 4.50 1.:14..27 0,00 0.00 0.00 9.00 35A5 7.14 1.-14-STABILITY CASES._Eitmraoely ,s.table Haduentely ikztable SloJ.jitly Unstale Sightly Stable,ýM60erately

Stable'Extrply stabie' ,Diretctin by, lti Speed'ii ftg5 NE ENE 5: ESESE SSE , 5S 3W W WSW540 IMW NW flW TOTAL,00 0.50.i .5!.1 1.63 0.D'0.Do 0.00 06.00 0,09 0,009 0.18e 0.3 1. 50 0.01.27 9.069 0.18 0.00 0.00 0.000 0,06 10,3 0.00 0,O0 O,#o.0.00 0.59 0.00 0 00: 0.00ý 005 0.41: 0,36 L87 1.46 C0- 1.55 0.05 0.41.0,00 .;00 o0,0 D.0. 0.00 0. 14 D,. 0Z7,.36 I.0.77. 1.3997 15 2501.67.1.59 215 ' -.55 0S.552:41 3.69 0.00 000o 0.016 0.oo 0:00a .0.0a ,04.0,64.1.41 2:23:7 2.13 1.32, 0.05 0.5.9 2.14 0.55 0,05 0,50so 1.23 2.32'3.1 3.00 0.14 0.36 1.68 4.42, 5,42 3.64.0.23 0.41'2.14 041 0. ors: 1.01 0.91 1.09 6,01: 18.71 27.04 1V.61.41N1 SPEED LamSSE-c A L-H, 31. mph l'o. -M65 (ýh.12.6 -1819 rvp IA 214.5 #b~MU7Y& Ttetxdk Imc ý600 EitBank,qThi, S%4teA P,13dtinr,.

flffiwis:

600467 '(84 7) 963.900.0; TABLE 11-22-US.a11e Coiunty Unfer4tifyj SLtati 3W5 ft: 1info Spceed and Directforl Jhrluary-'Dcenter, nI.4-375ft-3:3Ft Celta-T (F)Manter or C sel-aions 8747 Values are Percent Owizrrerce SPEED ----- ---I.. ---... --. ....OI RECT13 [LASSES ------------

STAJ3IUT CLASSES Eu w~ 5(i N: SS' l6 ES IOTAL CLASS N4 NNE NE0 CNE E ESE SE SSE.S SSW1 SW USW W4 144 NW M TOTAL F.O 0.00 ilt C U 0.00 A,. N 0,00 o~t 0,011 EU 0-00 E03 0.00 I 8U U Go h 0.02 3SS 0.03fl~i S0.,00.0 0.00 0.00 0.00 0.00 0.00.U,3*10.05 0.00!00 0:l00 oleo 0.00 0.00O 0.07 0,02 0.01 0.00 0.00 130 0,901 0.00 0 00 0.00 0,00 O.VO 0.00 0.00 0,0I 000 0.00 0.00 0,00' 0.00 0.00 O0.0 0.00 0.00 0.00 0.0O 0o.0 0,30 0.00 U.01, 0.01. 013;00 0,00 13,00 0,00 0,00 0.00 0,00 03 00 10.0.0. Oz 0.00 6,.00 a 00 0,00 0.00 0.00 13.130 0,130 0.006 0,00 OM, 0.00 6, of)0,00 6.:Z 0 00 60.0 0,00 1.01 0.00 0,0K 0.00 0.00 0.00~0.00 0,00 0.:00 0.00 0.00 0.00 0,.00 0.00 0,00 0.90 0,00 ol 8.50 ES EU 3 Sti ES 0400, 0,00 0.49 0.17 0,06 0.01 0 013 0,00 0.og 0.31 0.08 0.00 0,00 0.02 0,08 0.08.0.02o: oleo 0.00 1.00 0.38 0.17 0.01 0.00 0.00 0.10 0 q 0.07 M002 0,00 a. do a.CG 0,02 03.70 0,31 0.02 0 00 0.o0 0 00 0.o0 0.00 0.10 030 0.30 0.13 0.11 0.0 .86 0.00 0.00 0<00 0.00 0.o0 0.00 0.01 0.00 0.51 0.87 0.43 0.49 0 02 0.06ý 01 .0.00 0.00. 0.100 0.00 3.0op 0.02 0.07 1.04 1,03 0.42 0.50 0.090- 0,00 13.00 13 00 0.00 0.01 0.00 0.31 0.01 0.00 0.00 0.61 0.35 0.05 0.00 0,00 0.00.900 0.48 0.15 0.60 0 O0 0, ad 0,00 0.19 0.07 0.03 0.01.0.00 0,00 0,35 0.26 0,00 000D 0.41 0,37 1.03 0.00 0.00 0.30 0.05 0)81 0.00.0.00 0. 00 0.24 0,29 0,27 0,08 OMO 0.M7 0.005 0.40 0.23 0,00 0.00 0.00 0. 17 0.14, 0.10 0.00 4,00 0.0 0.00 0.00 0.61 0.25 0.21 a.13 0.00 0.00 0.i00 0.62.0.37 OX31 0 35 a00 0.00.0,00 0.00 0.00 0.01 0.29 0.25 0,13 0. 11 0.i9 0.13 0.02 0.02 0.00 0.00 0.00 0.00 0.03 0.05 0U09 0,67 0.31 0.37 0.38 0,26 O.13 0,08 0,00 0 00 0)003 0.00 0,13i D.05 1.13 1.07 0.,57 0.75 0.19 or. i 0. 02 1.003 0.00 0.00 0.00 0.00 0.40 0.00 0.00 0.03 U0,0 0.832 0.01*0.00 0.10 0.00 0.40 0.05 0.30 0 07 0.00 0.10t 0.01.0.88.0.05.0,00: 0..00 8.67 0.27" 0.07 0,00 0,00 0 00 0,00 0.00 0.00 0.00 0.00 0,00 0,00 0.33 0406 0M03 0.00 M150 0,23 0.13R 0.00 13.13 0.00 O.00 0.00 0.01 0,00 0,00 0.00 0.00 0,00 0,00.0.05 0.01 8,00 0.004 0,37 0.13 0.01 0.00 0.00 0.05 0.70 0.42 0.15 0,03 8.00 0.00 1.27 i.32 I 0.01: 0,00 0.013I 0,013 0.00 0,00 0.00 0,00 0O10 0.00 0,÷03 0013 0.00 6,00.00 0.0,0 0.15 0.10 0..00 0.00 0:.00.0.05.1.05 U.42 023 0-01 0<00'3.00 3.- 14 0.85 m.26 1.00 0. 0 0-00 0.00 o.0o 0,00 0. 0,1 0.00 0.00 0 00 OADI 0.00 0-40 0.13[L 02 0.01 0.. 00 0,00 oleo 1, 07 0,43 0.10 0.01 0.00.0.00 0.01 0.73 0.01 0.0.00 0,00 0,00 0.00 0900 0,00 0.00 0.00 0,00 0:.10 0,03 0.05 0.02.0<00.00 0 !0 0.00 0.00 002 0.10 0.00 0.00 0.100.0,00 0.00 0,50 0,47.0,33 0.03 So00 0,50 0.03 0.0 0.00 1,34, 0.20 0.0Of3 0.00 0.24 0.17 0.03" 0.00, 0.001 D;.78 0.31 0.05 0.00 0.03 1.37 0M5 0.09 0.05 0,00 0.O0 0.01 0. 24 0.00 0.19 11.41 5.56 2.57 0.00 0 O0 0;03.16.05 8.44 3.M2 1.0O1 0.01 2.24 3.10 u.24 8.65 0.01 0.00 01-41 5.56 2.57 0.71 20.44 0.03 0,54 16. 5 8.4,4 30.39 MuTTrJ & Tiette4, Inc. 600 Fitn Bank DNve, Suite A Palatine, llMnoi 60067 (847) 963.9000 UAWE 11 continued-23-Lasalle: Ccwmty Gere~ratinq Statlo 376, ft-. WirdSpeed arnd Mrectwion J~nuay-!ctr,96141 SPEED, ---- -IEToN -CLASSES CLASS. R NNE NE UE E E ESE SE SSE 5S SSVU SW W45W N %wN.tSTA$I-ITY CLASSES " .NW NI4J1OTAL.

Ei mu; SO N SS 1us; ES TOTAL EU, 9 5u-N ,2 SS ES GMl 1'54 N: 2'mS 4 1,5 ES 10.0 0,0z A0, 02 Q, AZ 016 0,00 040.,00 0.01-a,00o 0. 00'.0.03'0.0i 0.24 0,07 0.02,'01-0V 0;00.0.00.06.00 on0 O0,0 0.00 0,05 0.49 0144 0,00 0,6q0 0.00 0.01 0, A 0-'00 0.00 0 01 0.00 0.05 0,82 0.0 0.00 0; 2i 0,00 0,0L1 0.o02'0.21 0.:23 0,02: 0,011 0. 2s U, R9.a 0110 0.00 0,(0 0J00 0.15 0.26 0.19 omO 000 0102 0) 13.0 0)0-.06 D00 0,001 0.00 0.90 0.00 0T33 0,41 0.23 0-50" 0.0T -0. 13 u0,08 .U6 0,006 0,00, 0.01.0.97 0:31 0,00.0. 6i 0,01 1, 02 0, It 0.07 0.00 0.32 0.7 0.30 0:00 0,00 moo, 0-09 o'o 0.550 0.67: 0,22 0.01'O,0 3.03 0.64 0, IT 0.00.6.00 0.02 G 37ý0.3 0 1ý0 0.00 0.690 102" 1.07, 0.67 0.00, 0,03 1,1?1.00 0.000.0b5!, 25 0.61i 0.26 0,ý14 0.127 000 0,090,900:.omo.0.0-1.1-1 0.417'0.00 0,i00*oi. 000: 0,03 0,02 0.0100 0,01 0.01 0.13 0,37 0.07 0. 07 0,.06, 7. 40 6.96 1.ý55 0.13.1,19" 01:3.2.53 0U37 22.84 0.00 O.Uli 0 00 0.21 0 .11 0.00, 0,00 6.03 0,32.0.29 o:.19 6,05:0,00 0.00 0.00, 0.01 0ý02- 0,03O 0.72 10,1 144q. 1,4t 0 ý 0143 0.03 10.0 0.02 11 07 010'0.00 0.00 0.00 0,ý00, 11.0 1A2 0.0 0.00: 0.00.O0O12 0.17, 0,01 0<ý 0: 0, 06 7,0 6.86!.55 0.+13 1W.29 TOT 5.-25 3.G5 4.10: F5r09' 4, 07 3,0. 2- 5.32 943E. 0.1 7.89 64,3 :805 11,5.105,6:.

7.99. 5,5S 99.98 0,08 0.3 1.26:52.43:31190 11.60ý 4,43 Wind Direction bj Sta~bility, N 'tlWE NE ENE E 6~E SE- SSE, SS4 SW (10: W WNW 'NW W14 71DrAVý 4SABILIT'( CLASSES-11,00 0.02 0.05 3.804 0.30, A.67"0..00 0.031.:2.17 0.20 0,06 0.00 0;06.Z.70.1.144 0.0,1"O,'q'" p~ow 0.11' 0.03:.3.33 '145' 1'.59 0.11, 0.53: 0.0 0d.0i b0.0 0.00, 1.14 0.05 0.0 00-0, oz,.1.63.'1.19.0.40 0.00 0.03 2.13 I.03 4,48 0.:00 0,00 1.13.3.68 3.4..1. 65'0.A g0.0 0.-02 0-15 3.27 3.77 1.,28.0.3ý0,00, o 3.62:2.89 1.07 0.01 1.00 2,45'0.73 0,16 0.oz 0.00 0.23 4.48 2A..0.85, 0607 0.01%0.22 6.20 0,831 0;90 0.00 ,0.0 5110, 2.01 0,74 0A.0 0.04 0.00 q.01 3.90 1,15 8.10 0,08 0.23.1..26, 52.43 31.90 11.60 2.49 Extroily U~stablw"Oftrately, Ustathle S1Jtl~*y Un0stable NL4tral SlightlIy St1ble lMedeaia ly.Stab)&Extroelye Stab]e Wind: Prectjori by Yind Speed NINE NE ME". 'ESE ýE SSE ý S0-1 'W- 1SW W' WMW NWM 10 TOTAL -WUINDSPEEW CLASSES-0.00 0 07 IJO 107 0.31 040 0.58 1.10:1.121 0.-38 0.07'0.00 0.00o, 0.00 o.10 o,0 o.0,o 0-.46 0,63 .0,4 0,199 l,'41 1.01: 1.67 1.6;' 1.1 0.0- 1-117 0.8T 0. 0 0.30 0.59 0.0 3 0,31.0,80 1.17.0.61 0.30'0..40" 0, 00 0,46.0.83.0;71 0.40;0,00 0.05 M041 1.54 11X4 1.17 0,00'U,3 1'30M 2-.49 2.02-2.4j-0,00, 0.,0,.0.19- 010 0.S4 0)2 1,43 149 2.18 2.07 1,83. 12,0 2.64ý 145'0.00 1:1.1 1.93.1169 Ii. ,j0 0U.0 0.13 1,35 2,24 1. 93!L03'0 0.06 0 7- 0.00, M.02 0.09 0,54 3A08 3,0.5.2,54 0.09: 0,56 1.62'-2, .03.GA7 0.10 ,1.22 1.87 1,82 0.42: 1.34, 20.44.10.39, 22.84 16.29 C:A U.'c 3.5 3.6 -7.5 13.6 -12A5 24-5..I muffay & TTette4 Inc, 600'Fsft0A~kDrnwS~drA Paladc~lbwv, i1i ýi 0047' (847), 963.9000 5.5 Precipitation Monthly totals and the maximum 24-hour and. maximum I -hour precipitation amounts are summarized below;, The month with the most measured precipitation was August The month with the least measured precipitation was March*. The: maximum 214hour total was 4.67" (August) and the maximum 1-hour total was 1.92" (August).Table 12=Preripitation Totals fInches -2014 LaSe Site 86 Maximum Maximum Month Total 24-hour 1-hour ,January 1.36* 1.03 0.23*February 1,346' t11* 061V March 0,85* ý0.51* 0.15*April 3.08 1131 0.40 May: 3.75 0.98 0.93 June 8.04* 2.89' 16 July 2.21* 1,5t 0.99*August' 8.25 4,67 1.92 September 3.54 1V73 0179 October 2.40* 0,63* 0.23*November 1.38* 0.756 0.14*December 1.03 0.40 0.09 TOTAL 37.23*I some data are misaing -actual precipitation may be under-reported Murray & Trefted, Inc. 6oo First Bank Drve, &dtA Palatine, 6oo67 (847)963-90o00- 0 5.6 Doses Resulting from Airborne Releases The fbilowing are the maximum annual calculated cumulative offite doses resulting from LaSalle County Station airborne releases.LaSalle County Generating Station: Dose gamma air P beta air M)whole body (3 skin (l organ {' (infant-th~yroid), Mayimum Value 5.380.! .930 2.220 5.570 4V170 XýX X., X.X, 10Q; m rad 10- mad;104 mrem: 10-3 mrem.10*0 mrern Sector Affecfed East-Southeast East-Southeast East-Southeast East-Southeast Conrnflance Status 10 CFR 50 I Yearly Objective% of Appendix I.gamma air, beta air whole body skin organ: 10.0 20.0 5.0 15.0 mrad mrem mrem 0.05 0.01 0.44 0.04 27.8(4)(16 Gamtna Air Dhose -GASPAR 13,' NUREG-050:

Beta Air Dose:- GASPAR~ it. NUREG-0597' Whole .Body. Dose w GASPAR 11. NUREG-0697

$kInl Dowe'- GASPAR If* NI~JtREG4O7 Inhalation a~nd Food Pathways Do6se -GASPAR 11, NUR5G.-O597 Muyw&Tr)eftteJnm OooatffastkDriveoASueA Paulatine,lll1inals, 60067,(&7) 963-9000 PENI!I flIX Murray & Thette4, Inc. d0ooFfrSt BartDrw, ilteWA Pdatrwlln o~isx 60067 (847) 963-9000

'Exelon Contract Number 455465 D4 10/13 g IR-2f Pagel1of 6 LaSalle Meteorological Calibratior Dte:-J POWER SUPPLIES+12.000V

0.120V -12.000V *,0.120V A:+_____v A:- IZ.0T v B:2.-'? + ____Signal condltioners and Digital Recorder.SiAnal Conditioner VoltaoOut, Qfgltal reorder Speoffications SlcaI ond.AF ...AL. -.U.19-JYliIL.

AF AL~QIL~PRCP LO.E O V PRCPIHI H V WSZERO. 5 V Ws $PAN-L ~-TI V W D zr=Ro- -& o9v P SPAN--3-3'3 V r zERO .ADO-I>V TSPAN '~lV ,WS ZERQ~.S__ -V'WS SPAN-I. S -(_V'WE)ZERO,:. 0- V Wo SPAN!-32L(4-v 1 AT 1 ZERO -060~ V ST¶ SPAN-.L- -O..V AT 2 ZERO.ý"OV ATSPANI).qq5ý_V.WS ZERO--!Z'ýLV Ws SPAN. .-ý-Q-(V WD ZEROz U 021V WD SPAN1$13 -_V AT, ZERO, -C02>V.AT, SPAN-L,~ V i'zZERO, t v ,AT,$PANI-DL.'L)V-VJ002-9 _-0_mph SV C 200. ft.Vo 2ý S__mph, 2.- -f;0 V -SDLmph 3-3 3 33-v 3 &0 5- V 5 pý. Vfx -D~raph-=-V C- 6-- V'mph_-__mph

.mph mph> mpkhz- " mph 5z. Mph..Z- mph S/.6 0.- ap O, S~i,,.mphb

-mph£.-, nph_- mph-. a 0 ~a.0.0OOV i 0..050V 6.00OV +/- 0.050V 0.02,5V

0.025V 2.600V +/- 0.025V 0.000V

0Ao00V 3,333V10~1 OOV O1000V

0.050V 6.00OoV 0.050V 0.02.5 +/- 0.025V 2.600V

0.026V 01004V

0.1 00V, S.33V Oil. OOV 0.000v 0 .0wv.5.0O0Vt 0 .050V 0.000V, t 0.050V 6.OOOV

6.060V.0.025V* O0.025V 2.M0V

MOM25\0.000v 0.1 ~OOV O-OOOV

0.050V 5.000*t 0.060V 5.000V i MOM50 AL EOUIV

0.01" AL EQUIV+/- 0.016 AL EQUIV + .imph AL EQUV '+.Imph AL EQUIV + 1 0 AL EQUIV + 1 ALEQUiV+ ,l 0 F AL. EQUIV + iiF AL EQUIV + .lmph;AL EQUIV + .1mph AL EQUIV + I1 AL EQUIV +11 AL EQUIV + ,1 0 F AL EQUIV +,.1OF AL EQUIV +Almph-AL EOUIV+ .1mph AL EQUIV+ 1*AL. EQUIV + 10.AL EQUIV + .'1F AL EQUIV + .i 0 F I 0 MutraY &T7rwrAir -n. 600 Pintr BwAn Drime, SuiteA -Paladrour Ilinois .60067 20 (41) 963,9000 Eelnon nract Number, 455465 LaSalle I1Jotdorologlcal Cai~bration DS 10/13 R-29 PagG2 of 6 Date.TOWER MEASUREM~ENTS AF A4 AF A.L L ?,A OF -Fi2F ____-2 55 _F _OF '1OOF OF+/-0.5OF tl.18, 0 F-Measureod Rec~oded.Difference:

Sooecdfictoft 7-OO -OeF OF -- *F, OF*O.18OF.AF AL INs staff, 2Je...jph

--mph Forw. WD 'MI-Trackingbwar cC AF AL,*GE. -mph -: : mph....... .____ .. .o___" __ -.0 375 ft.AF: AL., m!L -ým-ph 4 h0.smph+/- 0.45mph 0W/3600 , 5!I 8O6/540* t 50-tomments cw A- tV~(W ~Mwt~y U Thu4 Inc. 600 Ffrt Bank Dilw &a~e A~ Paia~jneIWno~s

.60067 ~ (847) 963.9000 LaSalle Meteorological Calibration Exelon Contract Number 45s465 10/13 R-29 Page3&6't Date: Z-fZ-.4 Dates af Last Wind Sensor Bearing Replacements:-

133ft. 35........ .LO !Z/t-(12 mos.) Wind Drection:

-LL.:.... (.Aspirators:

OIL Operation of De-ice Heat Lamp:System (Aug-Mar):

t_ o " "r.., .-e-Operationof RafinGauge:m

ý, Tips Poured £ Tips Recorded UPS CdHECK: O..Debris Imsewen In cou-Installed Removed Tower Llah!-On Good- Fair Poor Tower Condition Good Fair, Poor Beacon 2 1 0Paint 0UO E , Sid lihts£1 0 Wifrng a0 r-0 l Mlasher 2100- 00 NOte: Calibration Inslruments:

w wt C-a Du!AF= Az Found Psychrometer.-S/N-wt',c tLI, A, = As Left, Digital multlmeter-:SIN-, ,g$soz2-.0=

Z6T-no change (AF=AL) Digital muitlmeter-SIN-

-_"___ '__Digal thermometer,-

S/N M-FS Full Scale.Technicians:

itlIE i l. ,. f Vt.,JE ,.Comments:.

1'L tJ'6 Aftiniture:

llua ,-L umzy & Tret*d It= 600 Fitzt Bank Dia Suite A. ,pa~tfw n, ioh, 6067 a (847) 963-900

)xelon Contract Hunber 455465 D7 R-29 Page 4 of 6 System-Response Check Date: z-1.*- H Site; LaSafle System: Mterotet ow33' WS 200' WS 375' WS 33' WO 200' WD 375' WD 33' T 200'AT 375' AT Response 20.0 Ua.4 20.0U0.4 20.0 -0.4 108-:2 108+/-:2 108 +/-2 6.80 *0.7 -6,00 +/-0.18 -6.00 :0.18 As Found 2, .0 As Left -..- .. ----aheck 33! WS 200' WS 375' WS 33' WD 200' WD, 375' WD 33' T 200' AT 375' AT ExPected 60.0 +/-0,4 60.0.+/-0.4 60,040.4 324+/-12 324 *2 324+/-*2 84.4A *0.7 2,0t0 0.18 2.00 10.18 Response I h F o u n di 5 4.,1 o ,j .B .As Left _R -p~ons .. .. ...._g 33! WS 200' WS 375' WS, 33' WD 20(r WD 375' WD 33' T 200' AT 375' AT Erpected 80.0 40.4 80.0 0.4 80.0+/- 0.4 432+/-2 432*2 432-+/-2 93.204 0.7 6.00 +/-0.18 5 .00+/-0.18-Response _____ _____ _____ __ ___As Found As Lef ..t..-ponse A 1 ____________

.1 .1 L L Mumm& ~Tmtv In=.. M0 Rutn Baik Vnw Swm A Pakene flihwbi .6D06? 7t (84?) 963.9O00 Bxeion Contract Number 455465 10)13 R-29 Page 5 of 6 System Response Check Dale:. 'a I --k IC Site: LaSalle System: Process Computer L2W.SL2 A847 AM4 AE49 AO A861A I I A86 I AM A4 A855 A856__Rp 375' WD 200' WD 375' WS 200' WS 375! AT: 3'WS _3WD 33"T 2U" 0AT Prrecipitauon xpeted 108+/-2 108+/-2 20,0 *0.4 20.0+/-0.4 400.0.18 20.0-0.4 10812 6.80 *0,7 ,4-00-A.18 0.20 *0.01 As Found Response I1 0A 10310 1) lcb' Lo LA. a .02- to --1 -'1 0 oZ0 As Left -.-- ".0 ,-- --Response.MY Scal A847 A848 AM4 A65O A851 A852 A853 AIM4 ABSO A856 375' WD 200' WD. 375' WS. 200' WS 375' AT 33' WS 33' WD 33 T 200' AT Precipitation Egpected 324:t2 324 +/-2 60.0 0.4 60.0 :0.4 8.00 +/-0.18: 60.0 +/-0.4 324*t2 64.40 :o.7 8.00+/-0.18 0.60 +/-1.01 ,R,,ponse_

_ _ _ _ _ _ ...,_ _ __ _ _ _ _ ___ _ _ _ __ _ _ _ _ _As Found s. _ ___ ___ -I ___ 67 13 I0_

li Z ';..,:"}, '3, ..:, ~ =As Lef't _ ----Response .i-" Ceck 375' WID 20' WWD 376' WS 200' WS 375' WT 33 WS 33' WD 33' T 200' AT Precipitation F-estold 432 +/-2. 432 +/-2 80.0 +/-OA 800,W.4 14.00+/-0.18 80.0+/-0.4 432 +/-2 93.20:0.7 14.00-0.18 0.80o0.01 Response ..... ..As Found i t I I.1 L( qaA b -2 0.Reponse AsaLeft --b---Re*ponse 2~cbI.MwrM& Tm* In=.. WO Filatnk DO% e,&*UeA Flaldni M,1ntm' 667 W (847) 963.9=0 Exelan Contract Number 455465 Do 10113 R-29 Page6 of a System Response Check Date: --Z.q .Site: LaSalle System: Control Room Indicators Mid Scale Che 200' WS 375' WS 200' WD 375' WD 375' AT Expected6.*.

6.Gl1 Response60.01.0 60.010 324 *15.4 L 324 +/-5.4 &,00 i-0.3 As oun 3Z.0'_ __1a1ns* _--Full-Scale Cheok 200' WS 375' WS 200' WD 375' WD I375!-4T Eected 80.0 *1.0 80.0 *1.0 432 *5.4 432 *5A 14.00 *0.3 Response ______ _____As Found Response Z____ __5_ q30 As Left R Eonse ....M=May& Trttl I=u: -6GO Fit Ban tvSsde A -Palaw I6OQ,667 V 847)963-9M Exelon Contract Number 455465 D4 10/13 R-29 Pags of 6 LaSalle M~eteorological Calibratlor Datme: &" 1 POWER SUPPLIES+12.0OOV

0.1 20V -12.000V

120V A:,+ 1Z.-a w A-12. -_____V+:* 22. o31 v v Signal conditioners and Dig0.al Recorder;AE. A AL EQUIV Diaital recorder AF AL Sre-C*2f~ca~ns Siongl Cond.PRCP LO -D'00 V PRCP HI: ____-V WSZ7ERO .Y0Z WS sF!j-V2 V WDZERO.L-0OO_0V SPAN! !!--3 V rzERQorx ýL!!v T$PAN .~o3V WS ZERO -OZ15V WS SPANj'f'0---

V WVDZER0-'oc'__V WD SPAN3-3 35 V AT 1 ZERO, 0_0 V AT 1.SPAN. I~0 AT. ZERO -D-3_V AT 2 SPAN -1EV, WS ZERO' -v WS'SPAIN ~v WD ZERO, ` V WD SPAN~-2'^ýV____ZR --OD0V 4TISPAN.:ý, -ayV_rF 2 ZER0. _08-SV AT 2 SPAN! -1' V-- V _,____3.5 f t.-V O5 mph V 50.mph-. V ___Z q- V ftoo ,nn f I.-v -'__mph

___mph-V-V$4 9,- V 1 0.0 375 ft_____"V _____Omph-, ..v /OO ._. V.P/0cJ o..c:Ob V-__V0 O in mph_ -- mph s"(. rmpI7.rmph c5o o -- °-- o-= "-mphZ_--

mph, 2R, D.mph_-- mph O0 =- -._ _ _a a.-'"mph m- rph 6'mph_-.__mph

. , -a 34;:, .... ." -0,OOOVt +/- .050V 5.00OV

0.050V 0.05V* 0.025V 24.00Vi-AD.25V 0.000Vt +/- 0.IV 3.333V+/- 0.100V 0.OOV 0,0%v 5.000V *0.060V 0.025V +/- O0.025V 2.500V +/- 0.025V o0oaOVt 0 .100v 3.333V *0.IOOV 0.00WV +/- 0.050V 5.000W

0.050v 0,000V +/- 0..O60v 5.OV +/- 0 Ov .050V 0.2V*0.025V

,2.500V *0.025V 0.000V +/-0.100Vf 3.333V +/-0.10OV 0.000V

0.050V SM00V

0.Osov, 0.000V

0.0Sov, 5.0oOv +/- 0.050v AL EQUIV t 0.01" AL EQUIV +/- 0,010 AL EQUIV + .1mph AL. EQUY , .1mph AL EQUIV + 10 AL EQUIV + 16 AL EQUIV+ 1 0 F AL EQUIV +A,i 0 F AL EQUIV.+ .1mph AL EQUIV + ,1mph AL EQUIV fup AL EQUV+ 10'AL EQUIV .1 AL EQUIV + .1aF AL EQUIV + .1mph AL AL EQUIV + 1 AL EQUIV + 1I AL EQUIV ÷ .1VF AL EQUIV+ ,I°F Mumvy & T~euA In ba -600 Par BmA~ Drn,.,,Sate A.- F~aziurm M~imi, 60067 V (847) 963-9000I Exelon Contract Number 455465 LaSalle Meteorological Calibration D5 10113 R-29 Page 2 of 68 Date: 4-5."i TOWER MEASUREMENTS

)1 OMw0ii& Q esBt 33 ft A qib" Qj1 0- t. l AF AL AF AL,-3:.- F 'OF IIF__F!0.5'F +/-O.18OF Measured Recorded: Difference Speciffcatton:, 375 f.ai AF AL lb(VF O F 2OOF -WS stall Forw. WD Revr. WD Trackngkwes 33 ft.AF AL/ mph o =-_MP4°20 ED&AF AL'35'7a -177o 3754ft.AF AL L ' mph mph.J.__. -°&jjedifloallon 0.5mph

0.45ph 00136D0?*SO Coinmenta:

w7 P -7qw .M 6 7ryTrezr4

[;c. -600 Fiszat Dý.Aviw Sidte A.- Parazitim, JIigrois.

60067 9 (847)963.900 Exelon. Cont-ract Number 455.465 Do 10/13 R-29 Page 3 of S LaSalle Meteorological Calibration Date, Dates of Last Wind Sensor Bearing Replacements:

3IL200 ft.' 375 ft.'(6mosz.) WindSpeed'.

40 f-.I

_____i_(12 Mos.) Wind Drection:

76"5,II$ ___ .._ /J" (q'3 20 375 ft.Asplmtorw,:

..L.Operatton of DeIce meat Lamp sytem'(Au-Mar)

MflOperation of Rain Gauge:p Tips Poured t Tips Recordedt I 0 UPS CHECK: M -Debris Screen:.,.2 Out. Installed:

Removed'Twr Ughtia Good Feir Pcr Tower *.pnditfoQ Good Fair; Poor.Beacon J 11E" 0Paint. g-I 0 0: Side lights El 0 J-WIdtng El E E3l Flasher 0

0 te0mn.fo..

J El Note: Calibratfon Instrumens:

NM Cal Due AF 'As Found Psychrometer-S/Nv- .MT&L'tO- "M7-z14'AL. As:Left Digital mulfmeter-S/N -1312-OZOU MAY Z 4 6D--no change (AF=AL) Digital multimeter

-S/N -........

...Digital thermometer;-

S/N-FS = Full Scale Technicians::

VI-y " MAlD1OfiA, 11A C-7 1AA X _ _ _ _Comments:

d e 4.0 1-ý1\4 14&ZZ I Slaat..re:

Mtamay &TTeAhmu4 600 5 Fiat Badk No Sufte A -Paladne, illinis -6,0067 Vt (647) 963,90M0 Exelon~:cofltract 14umber 455465 W7 10/13.R-29 Page 4 of 0 Date:L', -f q System Response Check Site: LaSaila sy~tern: Microtol Loak 33 WS 200' WS 375' WS 33 WD 200' WD 375' WO 33' T 200' AT 375' AT.......a fted 20.0 +/-0.4 20.0 0.4 20.0 +/--0.4 108+/-2 108 t2 105 12 6880-0J -6.00 10.18 -6.0010.18 As FoundNo I -.33' WS 200' WS 375' WS 33' WD 200' WD 375' WO 3U T 200' AT 375' AT 2xpw'tad 60.0+/-0.4 W 0A 0 +/-0.4 60.0 -0.4 324+/-2 324+/-2 324:*21 64.40 +/-0.7 2.00 0.18 2.00 +/-0.18 Raponae -....jM .Found V F-I Scalk 3 W$ 200' WS 375' WS 33' WO 200'W WD 37 WD 3 T i 200' AT 375'. AT As Found 80.00.4A 30.0-,+/-.4 60.01-0.4 432+/-t2 432 +/-2 432 *2 93.20 +/-0.7 6.00 40.18 6.00.-10.18 AsFound ,D As Left -I..Response ________ ________ ____ ________ ________MiaMa& STUt I=~ -600 Rrzt Bok Driuc Suie A Pakanr,, 1Wiu -.60067 It (841) 963.9000 Exelon Contract Number 455465 05 10/13 R-29 Page 5 of.5 System: Response Check Date: ./ -Site: LaSalle System: Process Computer Low $Cte A47 A848 A849 A850 A851 A852 A853 A854 A855 A856 SC~kM, 375' WD 200' WD 375'WS 200' WS 375' AT 33T WS 33V WD 33' T 200' AT Precipitation Espected 108*.2 108,2 a 20.04OA 200 +/-0.4 -4.00+/-0.18 20.0*0.4 108t2 6.80 *0.7 -4.0O+/-0.1B 0.20-'0.01 As Found q&I 7D,0- --Zr0 8.~A~s a L_____.___

-"____ ____ _ .-.--____ _ _____--____

Responsae,___

____ ___As Left Mid Son A847 A48 A849 A850 A851 Am52 A853 A854 AW55 A856 f 376! WD 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation, Expe-ted 324*2 324 *2 60.0 +/-0.4 60.0 *0.4 8.00 +0;18 60.0 +/-0.4 324*2. 14.40 +/-0,7 8.00t0.18 0.60 *0.01 Response _______________________

______ ___As Found Response 85 1.~ q. -j 19 -7 ý ? 7~R As Left I Full sca A847 A48 A845 A855 A851 2.A5 A853 A854 A855 A856 375' WID 200' WD 375' WS 200' WS 375' AT 33' WS 33' WD 33' T 200' AT Precipitation Expected Expected 432 t2 432 +/-2 80.0+/-0.4 80.0-0.4 14.00+/-0.18 80.0 *0.4 432 *2 93.20+/-0.7 14.0010118 0.809 -OO Responsed As Foundlq ~ ~ q1~~z_'~ It 7__ 0.Z __ __ _ Tq'Respos _________________

___ _______Mwemy & T=u4 Inc. -60 Fm Ba Ni, Sida NA g -Pdw IWb 6D057 2 (847) 96JWOOO Exelon. Contract Nunibez..455465 DD.10113 R-29 page 6 of 53 System Response Check Date- *' *Site: LaSalle, System: Control Room Indicators tow Scale Chei1 200' WS 375' WS 200' WD 376' WD 375' AT..xpe ed 20.0 +/-1.0 20.0 k1.0 108 15.4 108 :5A -4.00 :L-0.3 Response ,, As Found Response f 0/ __ __As Loft --Responsa .........W ftale 200' WS 375' WS 200' WD 375' WD 375' AT Exected 60.0 :1.0 60.0+/-1.0 324 +/-3A 324 +/-5.4 8.00 +/-0.3 Response" As Found______ong QC __0 _ _ _MW A* LOUL Reanoaxe Fu &0h 200' WS 375' WS- 200' WD 375' WD 375' AT 8_ome R0.0*1,0 8010+/-1.0 432 +/-5A 432 *54 14.00 +/-0.3 As Found Respon~se

____ ___ ___ 430 14!As Left .... -Response-! t *Oný wAAe, M, (01+1 w~M I amy 6?2wu4 Lvmc -600 Fm Ba4 Dim SWM A -Plaut. BUiwa -.6W67 W (847) 963.l00 Exelon Contract Nwnber 455465 D4 10113 R-29 Page I of 6 LaSalle Meteorological Calibration Date-:+12.OOOV +/- 04 B:+ )- D..POWER SUPPLIES 20V -12.000V1+/-

6.120V V A:- IzO-0 V Sv B:..) Signal conditioners and Digital Recorder: SiQnal Conditioner Voltage Out, Dfalb~I recorder goeiiain glg Co AFAL AL QUIV AF 'AL PRCP LO-1-0-0 V: PRCP HIL,-D02 _V i10 ft-= -V 35 ft.WS ZERO -0 2.3_V W8.$PANj2.'-%

V WD ZERO --"_V'p $PAN 3.!-3-3 V I-zEROaz )V TJSPAN .~Z WS ZERO.c, 2 -S_1 WS SPAWN Aj'q9Z-WD SPAN-3.3'---V Ar ZERO -O001bV AT, SPA.N.$Lý-V AT 2 ZERO--CO'_V,.AT 2 SPANLJ-/q?

V: WS'ZERO. 2-5 MS SPANL- -5 0 C)V WD~ SPAN3 j-9 V AT, ZERQLo* -I V ATtSPAN.L,6 0 11_V?2 ZERO-L O05_V AT, SPAN 251V._2357 V O' mph, 2..$OO0 V -6 mph-_ --Sv -Z.ov -Ia' ,OaP T- vb0Cj 4~V-:- V2--_mph':____V 0-'p" v-::-v/O0a.9v; 0 v0ý1 ND- N-.-C ,ph ", mphbmph -mph a 0 9-:99a° -,- a D, mph : mph* mph -__mph-. 0 0--. =0.S'mrph_- m .phmph ,, ,-- ,a 0.000V-1 0.050V 6.ooov +/- 0.050V 0.025V +/- 0.0251V 2.S00V

0.025V 0.000V +/- 0.100V1 3.333V1+/- 0.001V 01000V +/- 0.050V 6.000V +/-0.0osov 0.025V *;0.025V 2.500V +/- 0.025v1 0.00011ov 0.100ov 3.3331 t 0.100v 0.00011 0.05011 5.000V +/- o.050v o.oov 0.051ov'5.00011 0-05011 0.025v+/-,0.025V 2.500V

0.025V 0.000V1+/-0,100v1

$.333V+/- 0.100V 0.000V +/-0.050V 6.000V 0.0501V 0.000V +/- 0.050V 5.000V

0.050V AL EQUIV+/-0.01ff AL EQUIV+/- 0.01, AL EQUIV + .lmph AL EQUIV .1mph AL EQUIV+ 1'AL EQUIV + 1 0 AL EQUIV + ;aFp AL EQUIV + ,ImF AL EQUIV + .1mph.AL EQUIV+ +1 mph AL EQuIV + 1.0 AL EQUIV + 1 0 AL EQUIV+ .1"F AL EQUIV+ .Imph AL EQUIV,+ .imph AL EQUIV+ 10 AL EQUIV + 1V AL EQUIV +.1 OF AL EQUIV. +1 F AFL- ait-iwt M~a~y & Ti'ette Ina~ -600~s Thu&ux Dtfw. Suite A -Palatine, 10(nwfs -60067- W (847) 963-9000 Exelon Contract Nuxmber 455465 LaSalle MVeteorological Calibration D5 10/13 R-29 Page 2 of 6 Date: TOWER MEASUREMENTS 33 ft. Arab, 200 ft. AT,, AF AL AF, AL O..+/-F OF F -F OFA~ -"'+/-0.5 0 F ~ 0.18*F Measured Recorded Difference:

Speciffoation AF AL-ZV OF -__0 F ZJllOF OF'_*0.18 0 F 33 ft.AF AL WSstall L.5 mph e., mph Forw. WD 3,() 0 _'-_Revr. WD P62. -Monds.200 ft, AF AL f.mph 2mph 3.L6 -'171&~ i9 O 375 ft.AF AL-% mph !O... .ph 3 Sveciflcafon 0.5mph

0.45mph OV09i8

50 18001540+/-

150 TrackinghWear Comments.w AN2 !,HI- (q Mu~y& Triu4 lInc. -600 Fimt B&m Ddiv, Suite A -Pablyaum, lisL -6o0087 9 (847) 963.9000 Exelon Contract Num!ber 455465 D6 10/la3 R-2g9 Page 3 of 6 LaSalle Meteorological Calibration Dates of Last Wind Sensor Bearing Replacements;, 3f.206 ft.751 ,(6mos.) Wind Speed: -l .i9 1- t (I2mos.) Wind Direction:

__,_____ t-1 Jj' t)a..." 13_ ff.-t5 Asp.. mtors: , Operation of De-ice Heat Lamp System (Aug-Mar): -A-Operation of Rain Giugo:12]1.

Tips Poured. Tips Recorded 5" UPS CHECK: Q Debris screen: C -Out Installed-Removed Tower ULh(inq Good Fair Poor TowerCondition Good Fair Poor Beacon 0 0El J Pait 13 TI .0.E1l El Wiring 2 0 n ,J Flasher .. .. .0 S , heer condit-u .1 0 0 Note: AF = AsFound, AL ASLeft-= .no change (AF=AL)FS, FuPl ScaleýTechnicians:

fj 1c b ...dI .. .f CalibrationtInstruments:d.

Psychmmeter SIN -.Digital muIUmeter-SIN:- 53F,6 G ZD1)S5 Digital multimeter

-SIN-_Digital thermometer -SIN -. MI .zi_Mllct comment: f-r 3,gT ,ýok~ 1 w~~aJi a, ~f )cafo t0 k~~~~~~~~~

-~1 Lhl~(.> ~ h~ ~i"' rL'ff.b 44&Signature:

~Murnyý & Trczz4 Thc. -600 Ant Bank flriiw- Suite A. Pa zrn4. Miwhl .60067 9 (841) 963.9,000 Exelon contract Number 455465 10113 R-29 Page 4 of 6 Dats:_____

System Response Check Silo: LaSalle System:- Microtel 200'AT I 375' AT-1 I- I-6.00 1-0.18 [-6.00 +/-0.18 FullScaJe 33' WS 200' WS 375' WS 33' WD 200' WD 375T WO 33' T 200' AT 375' AT Expne 80.0 -0.4 80.0 +/-0.4 8040.+/-04 432+/-2: 432 k2 4324-2 93.20+/-0.7 6.00 +/-0.18 6.00 A0.18 Response _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.As Found L 1) 6 Ropn o o AsLeft s- -Response __ _ _ _____ _ _ _ _ _ _ _ _ _____ _ _ _wMump &~u Twkm. .6W0 Pint Bank Drfiw, SuirzA P&6d+/-ne, M~ncas -600672 (847) 963.000 Exelon Conitract lRumber 455465 D8 7110 R-26 Page 5 of 6 System Response Check Oats:- 0ý?I/L Site: LaSalle System: Process Computer A847 A948 A849 16 ABSO A851 A852 A853 A864. A855 A858 Check 375' WO 200' WD 375' WS 200' WS 375' tAT 33! WS 33' WD 33 T 200' AT Preclpitaton Expected 108;t2 108 +/-2 20.0 +/-0.4 20.0+/-0,4 -4.0040.18.

20.0+/-04A 1082 6.80 +/-0.7 -4.00+/-0.18 0,20 +/-0.01', Rapornse..

.As, Found Response /o7.5 /07.0 6,,o ..3,,9' 2-.L /o.Z -4,t'o z4.C As Left -Responise I_ _ III_ ____ j.Mdi A847 A848 A849 )AN a0 A851 A,52 A853 A854 A856 A856376" WO 200' WD 375' WS 200' WS 375' AT'. 33' WS 33' WD 33' T 200' AT Precipitation.

P dop~ctcd 324 +/-2 324 1-2 60.0+/-0.4 60.0+/-0.4 8.00 *0.18 60.0.+/-0.4:

324 +/-2 64.40 +/-0.7 8.00+/-0.18 0.60 +/-0.01 Response ... .. ... .As Found Response _ _ _As Left --Foltscale A847 A848 A849 AB50 A851 A852 A653 A854 p,85 A866 hk 375' WD 200' WD 375! WS 200' WS 375' AT 33' WS 33W WD 33' T 200'AT Precipitation Expocted 432 +/-2 432 +/-2 80.0 +/-0.4 80M0+/-0.A 14.00+/-0.18 80.0 +/-0.4 432 +/-2 93.20+/-0.7 14.00+/-0.18 0.80 +/-0.01 Response An Loft 7 ?,c-Reapon", 4C 0-~ d r7-4~ U/5 ) W M.m.&Tin .nA)0 Exelon .Contratt Numiber 455465 09 10113 R-29 page a of 5 System Response Check Date: 8 Site: LaSaIle System: Control Room indicatom LQw Chock 200' WS 375' WS 200' WD 375' WO 375' AT 20.0 20.0+/-0.0 108 +/-5.4 10 8t5.4 -4.00 +/-0.3 As Found Response __ 0,,, ......Mid Scar Chock 200W WS 375T WS 200' WD 375' WD 375' AT Ee d 8 0.0o+/-lo0 60.0 +/-1.0 324 +/-54 324+/-5.4 8.00 +/-o.3 AsFound. 3z __libR.eons

ou sz IW An LIMt Reanonas Fru# &RQb&O 200' WS 375' WS 200' WD 375' WD 375' VAT-0.0 +/-1.0 80.0 +i.0 432 i5,4 432 +/-5.4 14.00 *0.3 Response , ......_......As Found As Left I -Response _-_11.(1-11ILq Mumy & Alwu4 -r~ 600 Eftt Boa3. Drk% Uts. A, Pde.* 1UOw -6W67 3(f847) 963.9000

v t e Letter Sequence Response to RAI
TAC:MF5567, (Approved, Closed) TAC:MF5568, (Approved, Closed)
Initiation Request, Request, Request, Request, Request Acceptance, Acceptance Administration Meeting, Meeting, Meeting Questions 31 March 2015 30 April 2015 30 April 2015 22 May 2015 22 May 2015 Answers 2 July 2015 2 July 2015 2 July 2015 2 July 2015 2 July 2015 2 July 2015 2 July 2015 2 July 2015 2 July 2015 2 July 2015 2 July 2015 2 July 2015 27 August 2015 11 July 2016 Results Approval Other: ML15005A480, ML15089A353, ML15104A317, ML15106A392, ML15106A812, ML15132A674, ML15195A341, ML15195A342, ML16019A174, ML16200A156, ML16204A236, ML16224A786, ML16264A222, ML16299A103, RS-15-179, Hard Copies of Responses Sheets Plus Other Relevant Documents - Part 3 of 3, RS-15-230, Final, Impingement and Entrainment Characterization Study
MONTHYEAR2015-05-22 [Table View]

ML15195A344

Text

5.4 Stability

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