RA08-027, Annual Radioactive Effluent Release Report

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Annual Radioactive Effluent Release Report
ML081280837
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 04/30/2008
From: Enright D
Exelon Generation Co, Exelon Nuclear
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
FOIA/PA-2010-0209, RA08-027
Download: ML081280837 (97)
v • d • e


Text

Exeltn.

Exelon Generation Company, LLC www.exeloncorp.com Nuclear LaSalle County Station 2601 North 21" Road Marseilles, IL61341-9757 RA08-027 10 CFR 50.36a April 30, 2008 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 LaSalle County Station, Units 1 and 2 Facility Operating License Nos. NPF-1 1 and NPF-18 NRC Docket Nos. 50-373 and 50-374

Subject:

2007 Annual Radioactive Effluent Release Report Enclosed is the Exelon Generation Company, LLC, 2007 Annual Radioactive Effluent Release Report for LaSalle County Station, submitted in accordance with 10 CFR 50.36a, "Technical specifications on effluents from nuclear power reactors,"

paragraph (a)(2) and Technical Specification 5.6.3, "Radioactive Effluent Release Report."

Should you have any questions concerning this letter, please contact Mr. Terrence Simpkin, Regulatory Assurance Manager, at (815) 415-2800.

Respectfully, Daniel J. Enright Site Vice President LaSalle County Station Attachment cc: Regional Administrator - NRC Region III NRC Senior Resident Inspector - LaSalle County Station

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

Supplemental Information Regulatory Limits

a. Gaseous Effluents
1) The air dose due to noble gases released in gaseous effluents, from each reactor unit, from the site shall be limited to the following:

a) During any calendar quarter: Less than or equal to 5 mrad for gamma radiation and less than or equal to 10 mrad for beta radiation, and b) During any calendar year: Less than or equal to 10 mrad for gamma radiation and less than or equal to 20 mrad for beta radiation.

2) The dose to an individual from radioiodines and radioactive materials in particulate form, and radionuclides, other than noble gases, with half-lives greater than eight days in gaseous effluents released, from each reactor unit, from the site shall be limited to the following:

3) a) During any calendar quarter: Less than or equal to 7.5 mRem to any organ, and b) During any calendar year: Less than or equal to 15 mRem to any organ.

b. Liquid Effluents
1) The dose or dose commitment to an individual from radioactive materials in liquid effluents released, from each reactor unit, from the site shall be limited:

a) During any calendar quarter: Less than or equal to 1.5 mRem to the total body and to less than or equal to 5 mRem to any organ, and b) During any calendar year: Less than or equal to 3 mRem to the total body and to less than or equal to 10 mRem to any organ.

c. Total Dose -
1) The dose or dose commitment to any member of the public, due to releases or radioactivity and radiation, from uranium fuel cycle sources shall be limited to less than or equal to 25 mRem to the body or any organ (except the thyroid, which shall be limited to less than or equal to 75 mRem) over 12 consecutive months.

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

Supplemental Information (continued)

2. Allowable Concentrations -
a. Gaseous Effluents I) The dose rate due to radioactive materials released in gaseous effluents from the site shall be limited to the following:

a) For noble gases: Less than or equal to 500 mRem/year to the total body and less than or equal to 3000 mRem/year to the skin, and b) For all radioiodines and for all radioactive materials in particulate form, and radionuclides, other than noble gases, with half-lives greater than eight days: Less than or equal to 1500 mRem/year to any organ via the inhalation pathway.

b. Liquid Effluents I) The concentration of radioactive material released from the site shall be limited to ten (10) times the concentrations specified in 10 CFR Part 20, Appendix B, Table II, Column 2 for radionuclides other than dissolved or entrained noble gases. For dissolved or entrained noble gases, the concentration shall be limited to the following:

Nuclide DWC (uci/ml)

Kr-85m 2.OOE-04 Kr-85 5.OOE-04 Kr-87 4.OOE-05 Kr-88 9.OOE-05 Ar-41 7.OOE-05 Xe-131m 7.OOE-04 Xe-133m 5.OOE-04 Xe-133 6.OOE-04 Xe-135m 2.OOE-04 Xe- 135 2.OOE-04

3. Average Energy Not applicable - average energy is no longer used to determine dose to the public.
4. Measurements and Approximations of Total Radioactivity
a. Gaseous Effluents
1) Containment Vent and Purge System is sampled by grab sample which is analyzed for principal gamma emitters and H-3.
2) Main Vent Stack is sampled by grab sample, which is analyzed for principal gamma emitters and H-3.
3) Standby Gas Treatment System is sampled by grab sample, which is analyzed for principal gamma emitters.

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

Supplemental Information (continued)

4) All release types as listed in I and 2 above, at the vent stack and as listed in 3 above, at the Standby Gas Treatment System whenever there is flow, are continuously sampled by charcoal cartridge and particulate filter paper, which are analyzed for iodines and principal gamma emitters. Particulate filter papers are composited and analyzed for gross alpha, Sr-89 and Sr-90. Noble gases, gross beta and gamma are continuously monitored by noble gas monitors for the vent stack and the standby gas treatment system.
b. Liquid Effluents
1) Batch waste release tanks are sampled each batch for principal gamma emitters, 1-131, dissolved and entrained noble gases, H-3, gross alpha, Sr-89, Sr-90 and Fe-55.
2) Continuous releases are sampled continuously in proportion to the rate of flow of the effluent stream and by grab sample. Samples are analyzed for principal gamma emitters, 1-131, dissolved and entrained noble gases, H-3, gross alpha, Sr-89, Sr-90 and Fe-55.
5. Batch Releases
a. Gaseous
1) Number of batch releases: None
2) Total time period for batch releases: N/A
3) Maximum time period for a batch release: N/A
4) Average time period for batch releases: N/A
5) Minimum time period for a batch release: N/A
b. Liquid
1) Number of batch releases: None
2) Total time period for batch releases: Min. N/A
3) Maximum time period for a batch release: Min. N/A
4) Average time period for batch releases: Min. N/A
5) Minimum time period for a batch release: Min. N/A
6) Average stream flow during periods of release of effluent into a flowing stream: gpm N/A

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

Supplemental Information (continued)

6. Abnormal Releas(
a. Gaseous
1) Number of releases: None
2) Total activity released: N/A
b. Liquid
1) Number of releases: None
2) Total activity released: N/A
7. Process Control Program There were no changes to the Process Control Program during this time period.
8. Effluent Monitoring Instrumentation timeclocks and sample anomalies.

Time clocks:

There were no effluent monitoring time clocks exceeded in 2007.

Sample anomalies:

There were no sampling anomalies experienced during 2007.

9. Offsite Dose Calculation Manual Revisions.

There were no revisions made to the ODCM in 2007.

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

UNITS ONE AND TWO DOCKET NUMBERS 50-373 AND 50-374 GASEOUS EFFLUENTS-SUMMATION OF ALL RELEASES Estimated I Units I l stQtr I 2ndQtr I 3rdQtr I 4t'Qtr Total Error %

A. Fission and Activation Gas Releases

1. Total Release Activity Ci 6.23E+02 6.61 E+02 6.26E+02 7.19E+02 3.50E+01
2. Average Release Rate uCi/sec 8.01 E+01 8.40E+01 7.87E+01 9.04E+01
3. Percent of Technical Specification  %* * *
1. Total 1-131 Activity Ci 1.56E-02 1.90E-02 2.76E-02 1.79E-02 3.50E+01
2. Average Release Rate uCi/sec 2.OOE-03 2.42E-03 3.47E-03 2.26E-03
3. Percent of Technical Specification  %* * *
  • Limit C. Particulate (> 8 day half-life) Releases
1. Gross Activity Ci 3.06-02 3.05E-03 3.75E-03 3.15E-03 3.30E+01
2. Average Release Rate uCi/sec 3.94E-04 3.87E-04 4.71 E-04 3.95E-04
3. Percent of Technical Specification  %* * *
  • Limit
3. Gross Alpha Activity Ci <I.OOE-11 <1.OOE-11 <1.OOE-11 <1.OOE-11 D. Tritium Releases
1. Total Release Activity ["Ci [ 2.27E+01 [,2.17E+01 I 2.21E+01 I 2.87E+01 I 2.10E+01 I I '2.76E+00 I 2.78E+00 I 3.61E+00 I

[Limitj

12. Average Release Rate uCi/sec 2.92E+00
3. Percent of Technical Specification _

% _ I _

  • _ I _
  • _ I ___

"* This information is contained in the Radiological Impact on Man section of the report.

"<" Indicates activity of sample is less than LLD given in uCi/ml

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

GASEOUS EFFLUENTS-ELEVATED RELEASE Unit 1 and Unit 2 Continuous Mode I Units I 1't Qtr I 2nd Qtr I 3r1Qtr I 4th Qtr I

1. Fission and Activation Gas Releases Ar-41 Ci 7.29E-04 <1.OOE-4 <1.OOE-4 <1.OOE-4 Kr-85 Ci <1.OOE-4 <1.OOE-4 <1.OOE-4 <1.OOE-4 Kr-85m Ci 1.87E+02 1.88E+02 1.80E+02 1.73E+02 Kr-87 Ci 1.48E+01 3.81 E+00 3.99E+00 <1.OOE-4 Kr-88 Ci 2.74E+02 2.92E+02 2.45E+02 3.37E+02 Xe-131m Ci <1.OOE-4 <1.OOE-4 <1.OOE-4 <1.OOE-4 Xe- 133 Ci 1.47E+02 1.76E+02 1.97E+02 2.09E+02 Xe- 133m Ci 2.42E-04 <1.OOE-4 <1.OOE-4 <1.OOE-4 Xe-135 Ci 6.01 E-01 6.01 E-01 <1.OOE-4 <1 .OOE-4 Xe- I35m Ci 4.38E-04 <1.OOE-4 <1.OOE-4 <1.OOE-4 Xe- 138 Ci <1.OOE-4 <1.OOE-4 <1.OOE-4 <1.OOE-4 TOTAL Ci 6.23E+02 6.60E+02 6.26E+02 7.19E+02
2. Iodine Releases 1-131 Ci 1.56E-02 1.90E-02 2.76E-02 1.79E-02 1-132 Ci 1.91 E-02 3.43E-02 4.55E-02 2.03E-02 1-133 Ci 3.98E-02 5.61 E-02 8.32E-02 4.72E-02 1-134 Ci 9.54E-03 <1.OOE-11 9.89E-03 1.1OE-02 1-135 Ci 3.16E-02 5.11E-02 6.84E-02 3.37E-02 TOTAL IODINE Ci 1.16E-01 1.61 E-01 2.35E-01 1.30E-01 TOTAL 1-131, 1-133, 1-135 Ci 8.70E-02 1.26E-01 1.79E-01 9.88E-02
3. Particulate ( > 8 day half-life) Releases Cr-51 Ci <1.OOE-11 <1.OOE-11 <1.OOE-11 <1.OOE-11 Mn-54 Ci <1.OOE-11 5.14E-05 1.08E-05 <1.00e-11 Co-57 Ci <1.OOE-11 <1.OOE-11 <1.OOE-11 <1.00E-11 Fe-55 Ci <1.OOE-11 <1.OOE-11 <1.OOE-11 <1.OOE-11 Co-58 Ci <1.OOE-11 <1.OOE-11 <1.OOE-11 <1.OOE-11 Fe-59 Ci <1.OOE-1 1 <1.OOE-1 1 <1.OOE-1 1 <1.OOE-1 1 Co-60 Ci 5.25E-05 1.36E-04 2.08E-04 2.40E-04 Zn-65 Ci <1.OOE-11 <1.OOE-11 <1.OOE-11 <1.OOE-11 Sr-89 Ci 2.90E-02 9.51 E-04 1.1 OE-03 7.46E-04 Sr-90 Ci <1.OOE-11 <1.OOE-11 <1.OOE-11 <1.00E-11 Zr-95 Ci <1.OOE-1 1 <1.OOE-11 <1.00E-11 <1.00E-11 Mo-99 Ci <1.OOE-11 <1.OOE-11 <1.OOE-11 <1.OOE-11 Ru-103 Ci <1.OOE-11 <1.OOE-11 <1.OOE-11 <1.OOE-11 Sn- 117m Ci <1.OOE-11 <1.OOE-11 <1.OOE-11 <1.OOE-11 Cs-134 Ci <1.OOE-11 <1.OOE-11 <1.OOE-11 <1.OOE-11 Cs-137 Ci 1.31E-04 <1.OOE-11 <1.OOE-11 <1.00E-11 Ba\La- 140 Ci 1.42E-03 1.91 E-03 2.43E-03 2.16E-03 Ce- 141 Ci <1.OOE-1 1 <1.OOE-1 1 <1.OOE-1 1 <1.00E-1 1 Ce-144 Ci <1.OOE-11 <1.OOE-11 <1.00E-11 <1.OOE-11 TOTAL PARTICULATES Ci 3.06E-02 3.05E-03 3.75E-03 3.15E-03
4. Tritium Releases I. Total Release Activity Ci 2.27E+01 2.17E+01 2.21 E+01 2.87E*01

"<" Indicates activity of sample is less than LLD given in uCi/ml

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

LIQUID RELEASES UNIT 1 and UNIT 2 SUMMATION OF ALL LIQUID RELEASES Estimated Units I 1st Qtr 2nd Qtr I 3rd Qtr I 4th Qtr Total Error %

A. Fission and Activation Products

1. Total Activity Released Ci <LLD <LLD <LLD <LLD N/A
2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD
3. Percent of Applicable Limit  %* * *
1. Total Activity Released Ci <LLD <LLD <LLD <LLD N/A
2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD
3. Percent of Applicable Limit  %* * *
  • C. Dissolved Noble Gases
1. Total Activity Released Ci <LLD <LLD <LLD <LLD N/A
2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD
3. Percent of Applicable Limit  %* * *
  • D. Gross Alpha
1. Total Activity Released (estimate) Ci <LLD <LLD <LLD <LLD N/A
2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD
3. Percent of Applicable Limit  %* * *
  • IE. Volume of Liquid Waste to Discharge liters o.OOE+00 o.OOE+00 o.OOE+00 o.OOE+00 N/A IF. Volume of Dilution Water liters 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00 N/A

"*"This information is contained in the Radiological Impact on Man section of the report.

"<" Indicates activity of sample is less than LLD given in uCi/ml

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

LIQUID RELEASES UNIT 1 and UNIT 2 BATCH MODE INuclides From Batch Releases Units I 1st Qtr I 2nd Qtr I 3rd Qtr I 4th Qtr H-3 Ci <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD Ag-r 10m Ci <LLD <LLD <LLD <LLD Sb- 122 Ci <LLD <LLD <LLD <LLD Sb- 124 Ci <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD <LLD Cs- 134 Ci <LLD <LLD <LLD <LLD Cs- 137 Ci <LLD <LLD <LLD <LLD Ba\La- 140 Ci <LLD <LLD <LLD <LLD Ce- 141 Ci <LLD <LLD <LLD <LLD Ce- 144 Ci <LLD <LLD <LLD <LLD W- 187 Ci <LLD <LLD <LLD <LLD TOTAL Ci None None None None Xe- 131 m Ci <LLD <LLD <LLD <LLD Xe- 133 Ci <LLD <LLD <LLD <LLD Xe- 133m Ci <LLD <LLD <LLD <LLD Xe- 135 Ci <LLD <LLD <LLD <LLD Xe- 135m Ci <LLD <LLD <LLD <LLD TOTAL Ci None None None None

"<" Indicates activity of sample is less than LLD given in uCi/mi

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

LIQUID RELEASES UNIT 1 and UNIT 2 CONTINUOUS MODE

[Nuclides From Continuous Releases Units I 1st Qtr I 2nd Qtr I 3rd Qtr I 4th Qtr Gross Alpha Ci <I .00E-07 <1.00E-07 <1.00E-07 <1.00E-07 H-3 Ci <1.00E'05 <1.00E-05 <I.00E-05 <I .OOE-05 Cr-51 Ci <5.OOE-07 <5.OOE-07 <5.00E-07 <5.OOE-07 Mn-54 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Fe-55 (Estimate) Ci <1.00E-06 <I .00E-06 <I.OOE-06 <I .00E-06 Co-58 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.00E-07 Fe-59 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.00E-07 Co-60 Ci <5.00E-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Zn-65 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Sr-89 (Estimate) Ci <5.OOE-08 <5.OOE-08 <5.OOE-08 <5.OOE-08 Sr-90 (Estimate) Ci <5.OOE-08 <5.OOE-08 <5.OOE-08 <5.OOE-08 Nb-95 Ci <5.00E-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Zr-95 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.00E-07 Mo-99 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Tc-99m Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Ag-I 10m Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Sb- 122 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Sb-124 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 1-131 Ci <1.00E-06 <I.00E-06 <1.00E-06 <1.00E-06 Cs- 134 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Cs- 137 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Ba\La-140 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Ce-141 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 Ce-144 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 W- 187 Ci <5.OOE-07 <5.OOE-07 <5.OOE-07 <5.OOE-07 TOTAL Ci <LLD <LLD <LLD <LLD Xe-131rm Ci <I.OOE-05 <I.00E-05 <I.OOE-05 <I.OOE-05 Xe-133 Ci <1.00E-05 <1.00E-05 <I.00E-05 <I.OOE-05 Xe-133m Ci <I.OOE-05 <1.00E-05 <l.00E-05 <I.OOE-05 Xe- 135 Ci <I.OOE-05 <l.OOE-05 <1.00E-05 <l.OOE-05 Xe-135m Ci <I .00E-05 < l.00E-05 <1.00E-05 <1.00E-05 TOTAL Ci <LLD <LLD <LLD <LLD

"<" Indicates activity of sample is less than LLD given in uCi/ml

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FIRST QUARTER A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL

1. Spent resins, filter sludges, evaporator bottoms, etc.
a. Quantity shipped cu.m. O.OOE+00
b. Total activity Ci 0.00E+00
c. Major nuclides (estimate %) N/A
d. Shipment type N/A
2. Dry compressible waste, contaminated equipment, etc.
a. Quantity shipped cu.m. 2.74E+02
b. Total activity Ci 2.90E+00
c. Major nuclides (estimate %)

Co-60 7.1 2E+0 I Fe-55 1.97E+O1 Mn-54 6.06E+00 Ni-63 7.70E-0 1 Cs-137 4.13E-01

d. Shipment type LSA
3. Irradiated Components
a. Quantity shipped cu.m. 0.OOE+00
b. Total activity Ci 0.OOE+00
c. Major nuclides (estimate %) N/A
d. Shipment type N/A

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FIRST QUARTER

4. Other
a. Quantity shipped cu.m. 0.OOE+00
b. Total activity Ci 0.OOE+00 C. Major nuclides (estimate %) N/A
d. Shipment type N/A
5. Solid Waste Disposition Number of Shipments Transportation Mode Destination I Truck ALARON Corporation 5 Truck Duratek - Bear Creek TOTAL THIS QUARTER 6 Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (Jan-Mar) 2.50E+O I Estimated total error % for dry compressible waste, contaminated equipment, etc. (Jan-Mar) 2.50E+01 Estimated total error % for irradiated components (Jan-Mar) N/A B. IRRADIATED FUEL SHIPMENTS None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS SECOND QUARTER A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL

1. Spent resins, filter sludges, evaporator bottoms, etc.
a. Quantity shipped cu.m. 7.88E+00
b. Total activity Ci 2.3 IE+01
c. Major nuclides (estimate %)

Fe-55 6.02E+01 Co-60 1.74E+01 Mn-54 1.29E+01 Cr-51 3.32E+00 Fe-59 2.65E+00

d. Shipment type LSA, Type A
e. Solidification agent None
2. Dry compressible waste, contaminated equipment, etc.
a. Quantity shipped cu.m. 1.04E+02
b. Total activity Ci 3.25E-02
c. Major nuclides (estimate %)

Co-60 7.OOE+0 I Fe-55 1.93E+01 Mn-54 5.93E+00 H-3 1.84E+00 Ni-63 7.57E-01

d. Shipment type LSA

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS SECOND QUARTER

3. Irradiated Components (CRD Blades, LPRM Strings, SRM's)
a. Quantity shipped cu.m. 4.99E-01
b. Total activity Ci 5.75E+04
c. Major nuclides (estimate %)

Co-60 4.93E+01 Fe-55 4.45E+Ot Ni-63 3.66E+00 Mn-54 1.66E+00 Cr-51 3.65E-01

d. Shipment type Class C
4. Other
a. Quantity shipped cu.m. 0.OOE+00
b. Total activity Ci 0.OOE+00
c. Major nuclides (estimate %) N/A
d. Shipment type N/A
5. Solid Waste Disposition Number of Shipments Transportation Mode Destination 3 Truck Barnwell Waste Management Facility 9 Truck Duratek-Bear Creek TOTAL THIS QUARTER 12 Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (Apr-Jun) 2.50E+0 I Estimated total error % for dry compressible Waste, contaminated equipment, etc. (Apr-Jun) 2.50E+0 1 Estimated total error % for irradiated components (Apr-Jun) 2.50E+01 B. IRRADIATED FUEL SHIPMENTS None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS THIRD QUARTER A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL

1. Spent resins, filter sludges, evaporator bottoms, etc.
a. Quantity shipped cu.m. 6.73E+01
b. Total activity Ci 6.47E+01
c. Major nuclides (estimate %)

Fe-55 5.69E+01 Co-60 2.01E+01 Mn-54 1.22E+01 Cr-51 3.29E+00 Fe-59 2.57E+00

d. Shipment type LSA, Class A
e. Solidification agent N/A
2. Dry compressible waste, contaminated equipment, etc.
a. Quantity shipped cu.m. 3.28E+02
b. Total activity Ci 6.52E-02
c. Major nuclides (estimate %)

Co-60 6.94E+01 Fe-55 1.91E+01 Mn-54 5.77E+00 H-3 2.89E+00 Ni-63 7.53E-01

d. Shipment type LSA

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS THIRD QUARTER

3. Irradiated Components (CRD Blades, LPRM Strings, SRM's)
a. Quantity shipped cu.m. 1.90E-01
b. Total activity Ci 2.56E+04
c. Major nuclides (estimate %)

Co-60 5.08E+0 I Fe-55 4.34E+01 Ni-63 3.59E+00 Mn-54 1.44E+00 Cr-51 2.19E-01

d. Shipment type Class C
4. Other
a. Quantity shipped cu.m. 0.00E+00
b. Total activity Ci 0.00E+00 C. Major nuclides (estimate %) N/A
d. Shipment type N/A
5. Solid Waste Disposition Number of Shipments Transportation Mode Destination 8 Truck Energy Solutions, LLC.

(Containerized) 1 Truck Barnwell Waste Management Facility 4 Truck Duratek-Gallaher Rd, TN 11 Truck Duratek - Bear Creek TOTAL THIS QUARTER 24 Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (Jul-Sep) 2.50E+01 Estimated total error % for dry compressible waste, contaminated equipment, etc. (Jul-Sep) 2.50E+01.

Estimated total error % for irradiated components (Jul-Sep) 2.50E+01 B. IRRADIATED FUEL SHIPMENTS None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FOURTH QUARTER A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL

1. Spent resins, filter sludges, evaporator bottoms, etc.
a. Quantity shipped cu.m. 2.24E+01
b. Total activity Ci 1.65E+02
c. Major nuclides (estimate %)

Co-60 5.79E+01 Fe-55 3.19E+01 Cs- 137 4.78E+00 Ni-63 1.73E+00 Mn-54 1.48E+00'

d. Shipment type LSA, Class A
e. Solidification agent None
2. Dry compressible waste, contaminated equipment, etc.
a. Quantity shipped cu.m. 2.99E+02
b. Total activity Ci 1.75E-01
c. Major nuclides (estimate %)

Co-60 7.06E+01 Fe-55 1.95E+01 Mn-54 5.96E+00 H-3 9.83E-01 Ni-63 7.64E-0 1

d. Shipment type LSA
3. Irradiated Components
a. Quantity shipped cu.m. 0.OOE+00
b. Total activity Ci 0.OOE+00
c. Major nuclides (estimate %) N/A
d. Shipment type N/A

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FOURTH QUARTER

4. Other
a. Quantity shipped cu.m. 0.OOE+00
b. Total activity Ci 0.OOE+00 C. Major nuclides (estimate %) N/A
d. Shipment type N/A
5. Solid Waste Disposition Number of Shipments Transportation Mode Destination 7 Truck Duratek-Bear Creek 5 Truck Energy Solutions, LLC.

(Containerized) 1 Truck Studsvik Processing Facility, LLC.

TOTAL THIS QUARTER 13 Estimated total error % for spent resins, filter sludges, evaporator bottoms, etc. (Oct-Dec) 2.50E+01 Estimated total error % for dry compressible waste, contaminated equipment, etc. (Oct-Dec) 2.50E+0 1 Estimated total error % for other irradiated components (Oct-Dec) N/A B. IRRADIATED FUEL SHIPMENTS None

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RESULTING FROM RELEASES AND COMPLIANCE STATUS

AIRBORNE Effluents- IOCFR50 Listing 24-mar-2008 18:42:14 STATION: LASALLE STATION UNIT: 1 PERIOD: 01/01/07 12/31/07 NAME: ODCMLAS REPORT: ANNUAL MODE: ACTUAL

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE - 01/01/07 TO 12/31/07 CALCULATED 03/24/08 INFANT RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 1.22E-02 1.27E-02 1.07E-02 1.45E-02 5. 02E-02 (MEAD) (WSW) (WSW) (WSW) (WSW) (WSW)

BETA AIR 3.63E-04 3.57E-04 3.25E-04 3.81E-04 1. 43E-03 (MRAD) (ESE) (ESE) (ESE) (ESE) (ESE )

TOT. BODY 9.20E-03 9.63E-03 8.12E-03 1.10E-02 3.79E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW)

SKIN 9. 65E-03 1.01E-02 8.52E-03 1.15E-02 3.98E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW)

ORGAN 2 . 32E-03 3.78E-02 6.94E-02 2.17E-02 1.31E-01 (MREM) (ESE) (ESE) (ESE) (ESE ) (ESE )

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS - 10CFR 50 APP. I INFANT RECEPTOR

% OF APP

-- I.

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I GAMMA AIR (MRAD) 5.0 0.24 0.25 0.21 0.29 10.0 0.50 BETA AIR (MRAD) 10.0 0.00 0.00 0.00 0.00 20.0 0.01 TOT. BODY (MREM) 2.5 0.37 0.39 0.32 0.44 5.0 0.76 SKIN (MREM) 7.5 0.13 0.13 0.11 0.15 15.0 0.27 ORGAN (MREM) 7.5 0.03 0.50 0.93 0.29 15.0 0.87 THYROID THYROID THYROID THYROID THYROID RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE - 01/01/07 TO 12/31/07 CALCULATED 03/24/08 CHILD RECEPTOR IST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 1.22E-02 1.27E-02 1.07E-02 1.45E-02 5. 02E-02 (MRAD) (WSW) (WSW) (WSW) (WSW) (WSW)

BETA AIR 3. 63E-04 3.57E-04 3.25E-04 3.81E-04 1 . 43E-03 (MRAD) (ESE) (ESE) (ESE) (ESE) (ESE)

TOT. BODY 9.20E-03 9.63E-03 8.12E-03 1.10E-02 3. 79E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW)

SKIN 9.65E-03 1.01E-02 8.52E-03 1.15E-02 3. 98E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW)

ORGAN 1. 94E-03 4.22E-02 7.71E-02 2. 63E-02 1. 47E-01 (MREM) (NNE) (NNE) (NNE) (NNE) (NNE)

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS - 10CFR 50 APP. I CHILD RECEPTOR

% OF APP-- I.

QTRLY IST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR- JUN JUL-SEP OCT-DEC OBJ APP. I GAMMA AIR (MIRAD) 5.0 0.24 0.25 0.21 0.29 10.0 0.50 BETA AIR (M-RAD) 10.0 0.00 0.00 0.00 0.00 20.0 0.01 TOT. BODY (MREM) 2.5 0.37 0.39 0.32 0.44 5.0 0.76 SKIN (MREM) 7.5 0.13 0.13 0.11 0.15 15.0 0.27 ORGAN (MREM) 7.5 0.03 0.56 1.03 0.35 15.0 0.98 THYROID THYROID THYROID THYROID THYROID RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE - 01/01/07 TO 12/31/07 CALCULATED 03/24/08 TEENAGER RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR- JUN JUL-SEP OCT-DEC GAMMA AIR 1.22E-02 1.27E-02 1.07E-02 1.45E-02 5.02E-02 (MRAD) (WSW) (WSW) (WSW) (WSW) (WSW)

BETA AIR 3.63E-04 3.57E-04 3.25E-04 3.81E-04 1. 43E-03 (MRAD) (ESE) (ESE) (ESE ) (ESE) (ESE )

TOT. BODY 9.20E-03 9.63E-03 8.12E-03 1.10E-02 3. 79E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW )

SKIN 9.65E-03 1.01E-02 8.52E-03 1.15E-02 3. 98E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW)

ORGAN 1.44E-03 2.60E-02 4.73E-02 1.64E-02 9. 12E-02 (MREM) (NNE) (NNE) (NNE) (NNE) (NNE)

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS - 10CFR 50 APP. I TEENAGER RECEPTOR

% OF APP

-- I.

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I GAMMA AIR (MRAD) 5.0 0.24 0.25 0.21 0.29 10.0 0.50 BETA AIR (MRAD) 10.0 0.00 0.00 0.00 0.00 20.0 0.01 TOT. BODY (MREM) 2.5 0.37 0.39 0.32 0.44 5.0 0.76 SKIN (MREM) 7.5 0.13 0.13 0.11 0.15 15.0 0.27 ORGAN (MREM) 7.5 0.02 0.35 0.63 0.22 15.0 0.61 THYROID THYROID THYROID THYROID THYROID RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE - 01/01/07 TO 12/31/07 CALCULATED 03/24/08 ADULT RECEPTOR IST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL- SEP OCT-DEC GAMMA AIR 1.22E-02 1.27E-02 1.07E-02 1.45E-02 5. 02E-02 (MRAD) (WSW) (WSW) (WSW) (WSW) (WSW)

BETA AIR 3.63E-04 3.57E-04 3.25E-04 3.81E-04 1.43E-03 (MRAD) (ESE ) (ESE ) (ESE ) (ESE ) (ESE )

TOT. BODY 9.20E-03 9.63E-03 8.12E-03 1.10E-02 3. 79E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW)

SKIN 9.65E-03 1.01E-02 8.52E-03 1.15E-02 3. 98E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW)

ORGAN 1.58E-03 2.67E-02 4.85E-02 1.67E-02 9. 35E-02 (MREM) (NNE) (NNE) (NNE) (NNE) (NNE)

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS - 10CFR 50 APP. I ADULT RECEPTOR

 % OF APP I.-------------

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I GAMMA AIR (MRAD) 5.0 0.24 0.25 0.21 0.29 10.0 0.50 BETA AIR (MRAD) 10.0 0.00 0.00 0.00 0.00 20.0 0.01 TOT. BODY (MREM) 2.5 0.37 0.39 0.32 0.44 5.0 0.76 SKIN (MREM) 7.5 0.13 0.13 0.11 0.15 15.0 0.27 ORGAN (MREM) 7.5 0.02 0.36 0.65 0.22 15.0 0.62 THYROID THYROID THYROID THYROID THYROID RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

AQUATIC Effluents- 10CFR50 Listing 24-mar-2008 18:45:06 STATION: LASALLE STATION UNIT: 1 PERIOD: 01/01/07 12/31/07 NAME: ODCMLAS REPORT: ANNUAL MODE: ACTUAL

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE - 01/01/07 TO 12/31/07 CALCULATED 03/24/08 INFANT RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS - 10 CFR 50 APP. I

% OF APP I.

QTRLY IST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I TOTAL BODY (MREM) 1.5 0.00 0.00 0.00 0.00 3.0 0.00 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 10.0 0.00 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE 2007 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY WATER SYSTEM

  • PERIOD OF RELEASE - 01/01/07 TO 12/31/07 CALCULATED 03/24/08 INFANT RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS - 40 CFR 141 TYPE ANNUAL LIMIT  % OF LIMIT TOTAL 4.0 MREM 0.000 BODY INTERNAL 4.0 MREM 0.000 ORGAN
  • THIS CALCULATION OF DOSE IS BASED ON TECHNIQUES DESCRIBED IN THE COMMONWEALTH EDISON OFFSITE DOSE CALCULATION MANUAL. THESE TECHNIQUES DIFFER FROM THOSE DESCRIBED IN 40 CFR 141.

RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE - 01/01/07 TO 12/31/07 CALCULATED 03/24/08 CHILD RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS - 10 CFR 50 APP. I

 % OF APP I.

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I TOTAL BODY (MREM) 1.5 0.00 0.00 0.00 0.00 3.0 0.00 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 10.0 0.00 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE 2007 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY WATER SYSTEM

  • PERIOD OF RELEASE - 01/01/07 TO 12/31/07 CALCULATED 03/24/08 CHILD RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS - 40 CFR 141 TYPE ANNUAL LIMIT  % OF LIMIT TOTAL 4.0 MREM 0.000 BODY INTERNAL 4.0 MREM 0.000 ORGAN
  • THIS CALCULATION OF DOSE IS BASED ON TECHNIQUES DESCRIBED IN THE COMMONWEALTH EDISON OFFSITE DOSE CALCULATION MANUAL. THESE TECHNIQUES DIFFER FROM THOSE DESCRIBED IN 40 CFR 141.

RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE - 01/01/07 TO 12/31/07 CALCULATED 03/24/08 TEENAGER RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS - 10 CFR 50 APP. I

% OF APP I.

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I TOTAL BODY (MREM) 1.5 0.00 0.00 0.00 0.00 3.0 0.00 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 10.0 0.00 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE 2007 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY WATER SYSTEM

  • PERIOD OF RELEASE - 01/01/07 TO 12/31/07 CALCULATED 03/24/08 TEENAGER RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.00E+00 0.00E+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS - 40 CFR 141 TYPE ANNUAL LIMIT  % OF LIMIT TOTAL 4.0 MREM 0.000 BODY INTERNAL 4.0 MREM 0.000 ORGAN
  • THIS CALCULATION OF DOSE IS BASED ON TECHNIQUES DESCRIBED IN THE COMMONWEALTH EDISON OFFSITE DOSE CALCULATION MANUAL. THESE TECHNIQUES DIFFER FROM THOSE DESCRIBED IN 40 CFR 141.

RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE - 01/01/07 TO 12/31/07 CALCULATED 03/24/08 ADULT RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS - 10 CFR 50 APP. I

 % OF APP I.-------------

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY  % OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP. I TOTAL BODY (MREM) 1.5 0.00 0.00 0.00 0.00 3.0 0.00 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 10.0 0.00 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE 2007 ANNUAL REPORT PROJECTED DOSE AT NEAREST COMMUNITY WATER SYSTEM

  • PERIOD OF RELEASE - 01/01/07 TO 12/31/07 CALCULATED 03/24/08 ADULT RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS - 40 CFR 141 TYPE ANNUAL LIMIT  % OF LIMIT TOTAL 4.0 MREM 0.000 BODY INTERNAL 4.0 MREM 0.000 ORGAN
  • THIS CALCULATION OF DOSE IS BASED ON TECHNIQUES DESCRIBED IN THE COMMONWEALTH EDISON OFFSITE DOSE CALCULATION MANUAL. THESE TECHNIQUES DIFFER FROM THOSE DESCRIBED IN 40 CFR 141.

RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

24-mar-2008 18:44:16 Total Effective Dose Equivalent - 10CFR20 Listing STATION: LASALLE STATION UNIT: 1 PERIOD: 01/01/07 12/31/07 NAME: ODCMLAS REPORT: ANNUAL MODE: ACTUAL For ADULT dose calculations, the included pathways are:

INHALATION MILK PRODUCE VEGETABLES MEAT GROUND DEPOSITION FISH WATER SKYSHINE WHOLE BODY Airborne Effluents are complete from 01/01/07 to 12/31/07 Aquatic Effluents are complete from 01/01/07 to 12/31/07 Skyshine entries are complete from 01/01/07 to 12/31/07

LASALLE STATION UNIT ONE 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/07 TO 12/31/07 CALCULATED 03/24/08

1. 10 CFR 20.1301 (a) (1) Compliance Total Effective Dose Eqivalent, mrem/yr 3. 95E-01 10 CFR 20.1301 (a) (1) limit mrem/yr 100.0

% of limit 0.39 Compliance Summary - 10CFR20 ist 2nd 3rd 4th  % of Qtr Qtr Qtr Qtr Limit TEDE 9.79E-02 9.95E-02 1.OlE-01 9.66E-02 0.39 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT ONE 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/07 TO 12/31/07 CALCULATED 03/24/08

2. 10 CFR 20.1301 (d)/40 CFR 190 Compliance Dose Limit  % of (mrem) (mrem) Limit Whole Body Plume 3.79E-02 (DDE) Skyshine 3.43E-01 Ground 7.25E-04 Total 3.82E-01 25.0 1.53 Organ Dose Thyroid 8. 22E-02 75.0 0.11 (CDE) Gonads 1. 08E-02 25.0 0 .04 Breast 1. 08E-02 25.0 0. 04 Lung 1. 08E-02 25.0 0. 04 Marrow 1. 08E-02 25.0 0. 04 Bone 1.08E-02 25.0 0. 04 Remainder 1. 09E-02 25.0 0. 04 CEDE 1.30E-02 TEDE 3.95E-01 100.0 0.39 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

24-mar-2008 18:46:59 Total Effective Dose Equivalent - 10CFR20 Listing STATION: LASALLE STATION UNIT: 2 PERIOD: 01/01/07 12/31/07 NAME: ODCMLAS REPORT: ANNUAL MODE: ACTUAL For ADULT dose calculations, the included pathways are:

INHALATION MILK PRODUCE VEGETABLES MEAT GROUND DEPOSITION FISH WATER SKYSHINE WHOLE BODY Airborne Effluents are complete from to Aquatic Effluents are complete from to Skyshine entries are complete from 01/01/07 to 12/31/07

LASALLE STATION UNIT TWO 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/07 TO 12/31/07 CALCULATED 03/24/08

1. 10 CFR 20.1301 (a) (1) Compliance Total Effective Dose Eqivalent, mrem/yr 3.31E-01 10 CFR 20.1301 (a)(1) limit mrem/yr 100.0

% of limit 0.33 Compliance Summary - 10CFR20 1st 2nd 3rd 4th  % of Qtr Qtr Qtr Qtr Limit TEDE 6.50E-02 8.85E-02 8.76E-02 9.02E-02 0.33 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

LASALLE STATION UNIT TWO 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/07 TO 12/31/07 CALCULATED 03/24/08

2. 10 CFR 20.1301 (d)/40 CFR 190 Compliance Dose Limit  % of (mrem) (mrem) Limit Whole Body Plume 0. OOE+00 (DDE) Skyshine 3.31E-01 Ground 0. OOE+00 Total 3.31E-01 25.0 1.33 Organ Dose Thyroid 0. OOE+00 75.0 0.00 (CDE) Gonads 0 OOE+00 25.0 0.00 Breast 0. OOE+00 25.0 0.00 Lung 0. OOE+00 25.0 0.00 Marrow 0. OOE+00 25.0 0.00 Bone 0. OOE+00 25.0 0.00 Remainder 0. OOE+00 25.0 0.00 CEDE 0. OOE+00 TEDE 3.31E-01 100.0 0.33 RESULTS BASED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

METEOROLOGICAL DATA

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 13 2 0 0 19 NNE 0 8 12 3 2 0 25 NE 0 1 10 20 6 2 39 ENE 0 3 4 24 3 1 35 E 1 7 5 15 17 2 47 ESE 0 3 5 22 4 2 36 SE 0 0 6 1 3 0 10 SSE 0 0 4 1 1 0 6 S 0 0 1 5 0 0 6 SSW 0 1 6 7 5 1 20 SW 0 3 8 12 7 0 30 WSW 0 2 4 7 9 0 22 W 0 1 11 13 12 1 38 WNW 0 1 10 16 16 4 47 NW 0 1 15 6 4 0 26 NNW 0 3 23 13 0 0 39 Variable 0 0 0 0 0 0 0 Total 1 38 137 167 89 13 445 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 1 5 NNE 1 0 9 NE 1 2 11 ENE 1 1 4 E 3 0 4 ESE 3 2 6 SE 0 1 5 SSE 0 0 0 S 1 0 2 SSW 3 0 10 SW 8 1 15 WSW 6 3 14 W 10 3 23 WNW 7 21 38 NW 7 2 15 NNW 10 0 16 Variable 0 0 0 Total 1 3 65 63 37 8 177 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stab)ility class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating-Station Period of Record: January - March 2007 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 2 0 2 0 6 NNE 0 0 5 0 0 0 5 NE 0 0 1 5 4 0 10 ENE 0 1 2 3 3 0 9 E 0 0 2 7 2 0 11 ESE 0 0 3 5 2 0 10 SE 0 1 1 1 0 0 3 SSE 0 0 0 1 1 0 2 S 0 1 9 3 0 0 13 SSW 0 2 5 5 0 0 12 SW 0 2 7 5 1 0 15 WSW 0 1 2 6 2 4 15 W 0 2 12 18 6 0 38 WNW 0 3 7 3 20 1 34 NW 0 1 5 5 1 0 12 NNW 0 0 1 3 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 16 64 70 44 5 199 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 7 10 1 0 22 NNE 4 1 0 0 10 NE 11 3 0 0 15 ENE 9 10 0 0 23 E 18 17 13 8 59 ESE 10 7 3 0 27 SE 2 11 0 0 17 SSE 9 4 2 0 22 S 7 4 3 0 17 SSW 8 21 14 1 48 SW 24 32 14 0 74 WSW 11 16 3 11 47 W 26 27 6 8 68 WNW 33 43 34 5 117 NW 29 19 1 0 50 NNW 23 10 7 0 45 Variable 0 0 0 0 0 Total 6 55 231 235 101 33 661 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of.missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 7 3 2 0 0 N 13 7 2 0 0 0 NNE 11 NE 0 4 0 0 0 4 ENE 1 5 0 0 0 6 E 2 11 0 0 0 13 ESE 4 4 3 0 0 11 SE 1 2 0 0 0 3 SSE 3 2 5 2 0 12 S 4 4 12 8 2 30 SSW 2 10 25 14 2 53 SW 6 20 26 12 2 67 WSW 2 16 4 3 0 27 W 7 22 10 1 0 41 WNW 9 28 15 7 0 61 NW 11 26 7 0 0 44 NNW 1 7 1 0 0 9 Variable 0 0 0 0 0 0 Total 9 67 166 110 47 6 405 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stab)ility class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 1 1 0 0 0 2 ENE 0 0 0 0 0 0 0 E 0 0 2 0 0 0 2 ESE 0 0 3 0 0 0 3 SE 0 2 14 1 0 0 17 SSE 0 4 4 1 0 0 9 S 0 2 3 2 0 0 7 SSW 0 2 7 3 2 0 14 SW 0 7 11 4 0 0 22 WSW 0 8 7 2 0 0 17 W 0 12 12 8 0 0 32 WNW 0 17 21 4 0 0 42 NW 0 5 14 0 0 0 19 0 3 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 0 63 99 25 2 0 189 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabi lity class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 0 0 0 0 4 NNE 0 1 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 2 1 0 0 0 3 SSE 0 5 5 0 0 0 10 S 0 1 3 0 0 0 4 SSW 0 0 10 1 0 0 11 SW 0 7 12 7 0 0 26 WSW 0 4 3 0 0 0 7 W 0 5 4 1 0 0 10 WNW 0 0 2 0 0 0 2 NW 0 0 1 0 0 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 29 41 9 0 0 79 Hours of calm inthis stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 ' > 24 Total N 0 0 0 0 NNE 0 0 1 2 NE 0 0 1 2 ENE 0 0 1 5 E 0 1 5 8 ESE 0 1 1 4 SE 0 0 1 1 SSE 0 1 0 1 S 0 0 0 0 SSW 0 0 0 0 SW 0 0 7 7 WSW 0 0 1 2 0 9 12 W 0 1 0 0 0 0 1 WNW 0 0 0 2 2 0 4 0 1 1 3 2 0 7 NNW 0 0 0 2 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 2 5 14 9 26 56 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 8

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 5 0 0 6 NNE 0 0 4 2 1 0 7 NE 0 0 0 3 3 1 7 ENE 0 1 11 0 13 E 0 3 8 ESE 4 5 SE 0 2 SSE 0 1 S 0 2 SSW 0 3 SW 1 6 WSW 3 5 W 0 0 WNW 0 8 NW 0 6 NNW 0 7 Variable. 0 0 Total 1 11 38 24 12 86 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 24 Hours of missing stability measurements in all stability classes: 8

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 1 0 0 2 NNE 0 0 4 1 0 1 6 NE 0 0 0 2 1 8 11 ENE 0 0 0 0 3 0 3 E 0 1 1 0 2 6 10 ESE 0 0 3 3 5 5 16 SE 0 0 1 1 0 0 2 SSE 0 0 0 0 0 0 0 S 0 0 0 1 0 0 1 SSW 0 0 1 4 2 6 13 SW 0 0 1 1 0 1 3 WSW 0 0 0 2 3 2 7 W 0 0 2 7 12 1 22 WNW 0 0 1 8 4 1 14 NW 0 0 2 11 1 3 17 NNW 0 0 5 3 0 0 8 Variable 0 0 0 0 0 0 0 Total 0 1 22 45 33 34 135 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 19 Hours of missing stability measurements in all stability classes: 8

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 19 4 9 37 NNE 10 20 1 5 41 NE 3 18 13 12 50 ENE 7 18 9 4 38 E 3 15 13 36 68 ESE 8 25 15 8 60 SE 7 9 4 7 31 SSE 8 3 3 3 18 S 6 13 4 9 35 SSW 9 9 26 34 81 SW 7 15 35 30 90 WSW 4 12 22 33 73 W 7 42 37 32 121 WNW 11 27 54 60 155 NW 12 38 34 20 109 NNW 4 16 8 0 30 Variable 0 0 0 0 0 Total 2 43 109 299 282 302 1037 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 21 Hours of missing stability measurements in all stability classes: 8

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 5 7 5 4 23 NNE 1 1 1 7 1 0 11 NE 0 0 1 2 0 0 3 ENE 0 1 0 4 0 0 5 E 0 0 0 3 1 0 4 ESE 1 4 16 5 27 SE 3 3 1 6 13 SSE 4 2 2 8 16 S 3 4 3 19 29 SSW 3 2 5 66 77 SW 2 6 14 56 78 WSW 1 13 19 12 46 W 9 16 10 23 60 WNW 5 13 23 58 101 NW 3 25 21 16 67 NNW 0 1 7 9 9 1 27 Variable 0 0 0 0 0 0 0 Total 2 13 48 120 130 274 587 Hours of calm in this stability class: 0 Hours of missing wind measurements in this sitability class: 1 Hours of missing stability measurements in a*11 stability classes: 8

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 3 0 1 1 6 NNE 0 0 1 0 0 0 1 NE 0 0 1 0 0 0 1 ENE 0 0 0 1 0 0 1 E 0 0 0 0 0 0 0.

ESE 0 0 0 0 1 2 3 SE 0 0 0 0 2 2 4 SSE 0 0 0 1 1 4 6 S 0 0 1 5 2 3 11 SSW 0 1 1 7 1 9 19 SW 0 0 0 3 4 11 18 WSW 0 0 1 2 5 4 12 W 0 2 9 2 7 0 20 WNW 0 1 1 0 9 7 18 NW 1 0 0 1 5 2 9 NNW 0 0 4 6 10 0 20 Variable 0 0 0 0 0 0 0 Total 1 5 22 28 48 45 149 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 8

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 1 0 1 2 S 0 0 1 0 3 8 12 SSW 0 0 1 0 0 2 3 SW 0 0 0 1 0 4 5 WSW 0 0 0 1 0 10 11 W 0 0 0 1 0 0 1 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 2 4 3 25 34 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 8

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 NNE 0 0 NE 0 3 ENE 0 4 E 3 8 ESE 0 0 SE 0 0 SSE 0 1 S 1 7 SSW 10 21 SW 0 12 WSW 0 13 W 0 5 WNW 0 9 NW 0 5 NNW 0 2 Variable 0 0 Total 0 2 11 32 31 14 90 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 3 0 0 0 3 NE 0 0 0 7 0 0 7 ENE 0 0 1 4 0 2 7 E 0 0 1 0 0 1 2 ESE 0 0 0 0 0 0 0 SE 0 0 2 1 0 0 3 SSE 0 0 0 2 0 0 2 S 0 0 1 8 2 2 13 SSW 0 0 2 6 3 2 13 SW 0 0 6 1 0 1 8 WSW 0 0 1 8 1 0 10 W 0 1 2 5 0 0 8 WNW 0 0 13 8 5 0 26 NW 0 0 3 8 0 0 11 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 1 36 58 11 8 114 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 NNE 1 6 NE 7 15 ENE 4 15 E 0 4 ESE 1 4 SE 0 2 SSE 5 12 S 11 25 SSW 3 5 SW 3 15 WSW 4 11 W 4 7 WNW 19 31 NW 2 16 NNW 2 8 Variable 0 0 Total 0 22 65 66 22 5 180 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability cl asses: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 22 11 1 0 35 NNE 19 24 1 0 45 NE 15 20 27 1 63 ENE 25 26 23 11 94 E 15 28 44 10 101 ESE 10 23 15 4 58 SE 9 21 9 1 40 SSE 4 5 5 0 14 S 2 17 8 3 32 SSW 8 16 5 10 40 SW 4 21 7 3 40 WSW 8 12 7 5 33 W 6 15 11 5 38 WNW 14 31 21 18 93 NW 4 29 21 9 63 NNW 5 9 34 5 53 Variable *0 0 0 0 0 Total 4 170 308 239 85 36 842 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 14 2 0 0 0 18 NNE 1 23 9 0 0 0 33 NE 2 8 7 6 0 0 23 ENE 0 3 34 6 0 0 43 E 0 20 56 17 7 0 100 ESE 1 11i 3 6 3 0 24 SE 0 9 4 4 0 0 17 SSE 2 1 6 4 0 0 13 0 6 10 10 7 0 33 SSW 0 8 11 10 8 0 37 SW 2 10 14 16 2 0 44 WSW 0 9 8 3 0 1 21 W 2 10 17 2 5 1 37 WNW 1 13 8 6 0 17 45 NW 3 10 9 2 0 0 24 NNW 0 1 7 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 16 156 205 92 32 19 520 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 8 1 0 0 0 10 NNE 0 4 0 0 0 0 4 NE 0 2 0 0 0 0 2 ENE 1 1 0 0 0 0 2 E 0 13 7 1 0 0 21 ESE 0 9 7 2 0 0 18 SE 1 12 10 0 0 0 23 SSE 1 16 10 0 0 0 27 S 1 9 9 3 0 0 22 SSW 0 4 5 3 0 0 12 SW 1 5 8 2 0 0 16 WSW 3 10 10 1 0 0 24 W 0 5 2 0 0 0 7 WNW 0 15 1 0 0 0 16 2 10 1 0 0 0 13 NNW 2 8 0 0 0 0 10 Variable 0 0 0 0 0 0 0 Total 13 131 71 12 0 0 227 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 0 3 NNE 0 0 0 NE 0 0 0 ENE 0 0 1 E 5 1 8 ESE 8 2 11 SE 12 5 18 SSE 18 18 36 S 14 18 33 SSW 7 13 20 SW 4 21 25 WSW 3 8 11 W 14 1 15 WNW 14 0 14 NW 7 1 8 NNW 3 2 5 Variable 0 0 0 Total 6 112 90 0 0 0 208 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 6 6 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 0 0 0 2 3 13 18 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 NNE 0 0 1 2 4 NE 0 0 0 0 6 ENE 0 0 0 2 3 E 0 0 0 0 4 ESE 0 0 0 0 0 SE 0 0 0 0 0 SSE 0 0 0 0 0 S 0 0 0 3 6 SSW 0 0 0 0 10 SW 0 0 0 5 7 WSW 0 0 1 1 7 W 0 0 2 1 4 WNW 0 0 2 1 4 NW 0 0 0 3 9 NNW 0 0 0 1 2 Variable 0 0 0 0 0 Total 0 0 6 19 26 15 66 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 15 10 2 0 30 NNE 8 19 27 6 1 61 NE 13 11 27 39 7 97 ENE 12 18 32 20 30 114 E 7 18 30 39 12 107 ESE 6 19 14 9 15 63 SE 6 15 16 6 2 45 SSE 1 7 12 3 0 24 S 0 11 32 15 10 68 SSW 1 10 21 5 22 59 SW 5 21 10 9 10 55 WSW 3 11 20 21 9 64 W 3 10 14 10 7 44 WNW 12 25 50 36 32 155 NW 5 32 18 32 35 122 NNW 1 6 7 19 3 36 Var iablie 0 0 0 0 0 0 Total 4 86 248 340 271 195 1144 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 2 6 4 0 0 13 NNE 0 1 4 23 4 1 33 NE 1 1 10 8 0 0 20 ENE 1 2 14 30 11 0 58 E 0 3 9 23 17 20 72 ESE 1 1 8 21 10 9 50 SE 1 3 9 6 4 2 25 SSE 0 2 3 5 3 4 17 S 0 0 4 3 9 18 34 SSW 0 0 5 5 12 25 47 SW 0 0 5 10 15 24 54 WSW 1 1 7 11 6 2 28 W 0 1 7 11 10 9 38 WNW 0 7 8 14 14 20 63 NW 0 3 9 10 11 1 34 NNW 0 5 9 8 3 0 25 Variable 0 0 0 0 0 0 0 Total 6 32 117 192 129 135 611 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 2 4 1 1 0 9 NNE 0 4 1 1 0 0 6 NE 1 3 0 1 0 0 5 ENE 0 1 4 1 0 0 6 E 0 0 0 6 4 0 10 ESE 1 4 2 4 13 SE 2 10 3 6 23 SSE 1 5 8 3 17 S 2 4 5 17 31 SSW 4 7 4 20 35 SW 0 4 4 5 13 WSW 0 3 5 4 14 W 0 3 3 2 8 4 1 1 1 9 NW 4 6 3 0 14 NNW 0 0 4 4 3 0 11 Variable 0 0 0 0 0 0 0 Total 6 18 31 61 46 62 224 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stabi lity class: 0 Hours of missing stability measurements in all s tability classes: 3

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 1 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 1 1 0 0 0 0 2 ESE 0 1 1 0 1 1 4 SE 1 0 0 3 2 0 6 SSE 0 2 0 4 5 1 12 S 0 0 0 3 0 11 14 SSW 0 1 2 2 12 18 SW 2 2 2 4 3 14 WSW 1 0 2 4 13 21 W 3 2 0 0 6 WNW 0 2 2 0 0 4 NW 0 1 5 0 0 6 NNW 0 0 1 0 0 1 Variable 0 0 0 0 0 0 Total 9 10 26 18 41 109 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 0 0 0 NE 0 0 0 ENE 0 0 0 E 0 0 0 ESE 0 0 0 SE 0 0 0 SSE 0 0 0 S 0 0 1 SSW 0 0 13 SW 0 0 9 WSW 0 0 4 W 0 0 2 WNW 0 0 2 NW 0 0 0 0 0 0 Variable 0 0 0 Total 0 1 10 15 5 0 31 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 1 0 0 2 NNE 0 0 1 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 1 0 0 0 1 ESE 0 1 1 0 0 0 2 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 2 0 0 2 SSW 0 0 10 7 0 0 17 SW 0 2 19 7 0 0 28 WSW 0 0 6 5 2 0 13 W 0 0 7 6 0 0 13 WNW 0 0 16 3 0 0 19 NW 0 0 4 2 0 0 6 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 3 66 33 2 0 104 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 5 1 0 0 9 NNE 0 10 6 0 0 0 16 NE 0 4 7 0 0 0 11 ENE 0 0 8 0 0 0 8 E 0 3 1 0 0 0 4 ESE 0 1 0 0 0 0 1 SE 0 0 1 1 0 0 2 SSE 0 1 1 0 0 0 2 S 0 1 4 4 0 0 9 SSW 0 0 6 6 2 0 14 SW 0 9 17 6 0 0 32 WSW 0 8 10 4 0 0 22 W 0 6 6 4 1 0 17 WNW 0 8 13 1 0 0 22 NW 0 3 4 3 0 0 10 NNW 0 1 8 0 0 0 9 Variable 0 0 0 0 0 0 0 Total 0 58 97 30 3 0 188 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 34 15 1 52 NNE 2 46 6 0 54 NE 1 24 23 2 50 ENE 0 24 20 4 48 E 1 34 20 2 57 ESE 0 20 9 1 30 SE 1 18 17 0 36 SSE 1 24 18 1 44 S 3 12 19 20 54 SSW 2 6 17 17 42 SW 1 17 22 7 47 WSW 0 28 19 14 61 W 0 16 11 6 34 WNW 1 25 17 2 48 NW 0 13 9 4 27 NNW 1 15 28 14 58 Variable 0 0 0 0 0 Total 16 356 270 95 5 0 742 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 1 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 34 5 0 42 NNE 4 31 6 0 41 NE 2 8 18 0 28 ENE 3 7 21 3 34 E 0 17 21 0 38 ESE 4 10 11 0 25 SE 3 11 5 0 19 SSE 2 5 13 1 21 S 2 9 16 3 33 SSW 2 13 19 2 37 SW 0 18 25 13 56 WSW 3 7 10 3 23 W 1 4 6 0 12 WNW 3 11 8 1 23 NW 1 7 4 2 14 NNW 2 16 11 0 29 Variable 0 0 0 0 0 Total 35 208 199 28 0 475 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 19 0 0 21 NNE 9 0 0 9 NE 1 0 0 2 ENE 1 0 0 1 E 34 14 0 49 ESE 25 3 0 29 SE 18 2 0 21 SSE 17 11 0 32 S 15 4 0 19 SSW 19 8 0 31 SW 17 18 0 36 WSW 11 1 0 13 W 15 1 0 17 WNW 20 4 0 27 NW 11 0 0 12 NNW 6 2 0 9 Variable 0 0 0 0 Total 22 238 68 0 0 0 328 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 8 0 9 NNE 0 5 0 5 NE 1 0 0 1 ENE 1 1 0 2 E 2 9 4 15 ESE 3 29 6 38 SE 0 45 8 53 SSE 1 37 15 53 S 0 21 2 23 SSW 0 23 12 35 SW 0 22 16 38 WSW 1 20 11 32 W 2 11 1 14 WNW 0 8 0 8 NW 1 6 0 7 NNW 0 3 0 3 Variable 0 0 0 0 Total 13 248 75 0 0 0 336 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 0 0 0 NE 0 0 0 ENE 0 0 0 E 0 0 0 ESE 0 0 0 SE 0 0 0 SSE 0 0 0 S 0 0 0 SSW 0 0 0 SW 0 0 0 WSW 0 0 0 W 0 0 0 WNW 0 0 0 NW 0 0 0 NNW 0 0 0 Variable 0 0 0 Total 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 1 0 0 1 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 1 1 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 1 0 1 2 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 NNE 0 1 0 0 0 1 NE 0 0 0 0 0 0 ENE 0 0 0 0 0 0 E 0 0 0 0 0 0 ESE 0 0 0 0 0 0 SE 0 0 0 0 0 0 SSE 0 0 0 0 0 0 S 0 0 0 0 0 0 SSW 0 4 6 5 3 18 SW 0 0 4 1 5 0 10 WSW 0 0 0 0 2 2 4 W 0 0 0 0 0 0 0 0 0 1 3 0 0 4 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 10 10 12 5 37 Hours of, calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 20 24 9 2 0 55 NNE 20 44 10 0 0 74 NE 15 24 26 4 0 71 ENE 11 22 26 0 0 59 E 17 26 7 1 0 52 ESE 10 10 9 2 0 31 SE 14 11 8 3 0 36 SSE 16 10 7 0 0 33 S 4 8 22 17 4 55 SSW 1 12 36 17 15 82 SW 13 29 37 16 4 102 WSW 6 41 10 19 4 80 W 7 21 14 5 3 50 WNW 14 30 30 5 3 82 NW 11 23 21 11 1 68 NNW 9 14 17 10 0 50 Variable 0 0 0 0 0 0 Total 8 188 349 289 112 34 980 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 15 16 17 0 52 NNE 15 24 2 0 46 NE 5 29 5 0 43 ENE 15 42 8 0 69 E 10

  • 17 7 0 45 ESE 6 5 6 3 28 SE 11 5 6 1 28 SSE 5 7 6 2 25 S 6 8 11 9 40 SSW 3 9 12 17 42 SW 8 10 22 18 65 WSW 3 12 10 5 38 W 6 11 5 1 25 WNW 4 11 5 2 30 NW 8 11 11 3 35 NNW 4 6 7 1 25 Variable 0 0 0 0 0 Total 11 76 124 223 140 62 636 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 3 2 3 1 0 10 NNE 0 6 6 3 3 0 18 NE 0 3 4 8 0 0 15 ENE 1 2 3 0 1 0 7 E 0 2 4 11 8 0 25 ESE 1 9 13 8 10 2 43 SE 0 2 5 9 5 5 26 SSE 0 5 4 4 9 6 28 S 0 6 3 4 11 8 32 SSW 0 4 4 4 13 7 32 SW 0 3 8 12 12 15 50 WSW 0 0 5 5 3 2 15 W 0 1 9 5 5 0 20 WNW 0 0 4 3 6 0 13 NW 0 0 2 7 4 1 14 NNW 0 1 3 7 1 0 12 Variable 0 0 0 0 0 0 0 Total 3 47 79 93 92 46 360 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 0 0 1 NE 0 0 1 ENE 0 0 0 E 0 0 2 ESE 0 2 10 SE 0 15 28 SSE 0 22 35 S 0 16 27 SSW 0 9 28 SW 0 12 30 WSW 1 5 14 W 0 0 12 WNW 0 0 3 NW 0 0 0 NNW 0 0 0 Variable 0 0 0 Total 1 11 18 36 44 81 191 Hours of calm in this stability class 0 Hours of missing wind measurements in

  • this stability class: 0 Hours of missing stability measuremen .ts in all stability classes: 0

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 0 0 0 NE 0 0 0 ENE 0 0 0 E 0 0 0 ESE 0 0 0 SE 0 0 0 SSE 0 0 0 S 0 0 0 SSW 0 0 0 SW 0 0 1 WSW 0 0 0 W 0 0 0 WNW 0 0 0 NW 0 0 0 NNW 0 0 0 Variable 0 0 0 Total 0 0 1 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 NNE 0 0 0 NE 0 0 0 ENE 0 0 0 E 0 0 0 ESE 0 0 0 SE 0 0 0 SSE 0 0 0 S 0 0 0 SSW 0 1 5 SW 0 0 3 WSW 0 0 1 W 0 0 1 WNW 0 0 0 NW 0 0 0 NNW 0 0 0 Variable 0 0 0 Total 0 1 12 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 NNE 4 NE 1 ENE 1 E 0 ESE 0 SE 0 SSE 1 S 1 SSW 12 SW 6 WSW 3 W 3 WNW 0 NW 1 NNW 0 variable 0 Total 0 0 11 19 1 4 35 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 27 27 23 5 0 84 NNE 1 23 33 10 0 0 67 NE 0 6 9 8 1 0 24 ENE 0 6 5 9 2 0 22 E 0 8 8 12 0 0 28 ESE 1 3 15 10 1 0 30 SE 0 6 13 5 1 0 25 SSE 0 4 22 11 6 44 1

S 1 4 31 13 0 50 SSW 0 4 30 6 6 3 49 SW 0 2 37 21 2 3 65 WSW 1 4 14 5 10 2 36 W 2 11 35 29 22 16 115 WNW 0 14 24 37 12 0 87 NW 1 11 22 40 26 4 104 NNW 0 3 42 37 11 1 94 Variable 0 0 0 0 0 0 0 Total 9 136 367 276 105 31 924 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 23 7 2 0 0 34 NNE 2 16 14 0 0 0 32 NE 0 3 12 3 0 0 18 ENE 2 2 4 2 0 0 10 E 0 11 13 2 0 0 26 ESE 0 17 27 5 0 0 49 SE 1 10 10 18 1 0 40 SSE 0 9 17 16 4 0 46 S 0 10 21 21 6 0 58 SSW 1 12 17 27 5 0 62 SW 0 15 20 24 3 1 63 WSW 1 13 11 19 1 0 45 W 0 13 15 12 5 0 45 WNW 5 19 16 7 27 12 86 NW 2 16 26 12 6 0 62 NNW 0 15 24 1 0 0 40 Variable 0 0 0 0 0 0 0 Total 16 204 254 171 58 13 716 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 2 0 8 NNE 2 0 0 3 NE 0 0 0 0 ENE 1 1 0 2 E 1 5 0 6 ESE 5 5 0 12 SE 3 9 0 12 SSE 5 9 0 15 S 14 19 7 40 SSW 14 14 14 42 SW 6 24 11 41 WSW 0 13 1 15 W 10 8 1 20 WNW 13 6 0 19 NW 12 14 0 26 NNW 0 1 0 2 Variable 0 0 0 0 Total 8 91 130 34 0 0 263 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 1 0 0 0 1 ESE 0 5 2 0 0 0 7 SE 0 17 3 0 0 0 20 SSE 2 34 9 0 0 0 45 S 0 30 22 1 0 0 53 SSW 0 15 16 0 0 0 31 SW 0 8 25 0 0 0 33 WSW 0 9 12 0 0 0 21 W 0 13 5 0 0 0 18 WNW 0 10 3 0 0 0 13 NW 0 5 6 0 0 0 11 NNW 1 0 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 3 146 104 1 0 0 254 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 NNE 0 0 NE 0 0 ENE 0 0 E 0 0 ESE 0 0 SE 0 0 SSE 0 0 S 0 0 SSW 0 0 SW 0 0 WSW 0 0 W 0 0 WNW 0 0 NW 0 0 0 0 Variable 0 0 Total 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability cl asses: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 1 0 0 N 0 0 1 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 2 0 2 SW 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 0 Variable 0 0 Total 0 0 0 1 2 0 3 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 10 12 12 25 10 69 NNE 6 16 20 23 4 69 NE 4 3 13 10 5 35 ENE 5 7 12 6 1 31 E 1 7 8 7 1 24 ESE 4 3 12 6 4 29 SE 0 7 9 7 1 24 SSE 0 8 10 6 11 35 S 1 15 26 8 5 55 SSW 2 14 32 13 15 76 SW 6 15 32 15 7 76 WSW 2 14 7 6 38 67 W 2 22 23 23 22 92 WNW 6 11 18 23 31 89 NW 7 27 18 39 35 126 NNW 4 11 23 20 12 72 Variable 0 0 0 0 0 0 Total 3 60 192 275 237 202 969 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 5 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 6 10 3 27 NNE 14 14 2 0 34 NE 7 9 3 1 23 ENE 8 3 1 0 16 E 2 5 3 2 15 ESE 1 1 9 3 15 SE 2 15 13 15 46 SSE 6 21 15 9 53 S 6 23 20 25 76 SSW 3 21 17 57 100 SW 6 14 25 31 78 WSW 9 11 5 16 43 W 9 12 7 18 46 WNW 5 9 25 58 100 NW 4 32 8 5 58 NNW 4 10 13 2 33 Variable 0 0 0 0 0 Total 7 38 91 206 176 245 763 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 27 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 1 2 5 2 12 NNE 0 3 0 0 0 3 NE 0 2 0 0 0 2 ENE 0 3 0 0 0 3 E 1 0 0 0 0 i ESE 1 0 1 2 4 8 SE 0 4 1 2 4 11 SSE 1 2 4 2 8 17 S 0 7 7 7 16 38 SSW 0 11 15 16 35 77 SW 4 5 6 11 6 32 WSW 2 4 9 12 8 36 W 2 1 7 5 4 19 WNW 2 4 8 5 2 22 NW 3 1 5 4 4 17 NNW 0 2 5 5 1 13 Variable 0 0 0 0 0 0 Total 3 18 50 70 76 94 311 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Period of Record: October - December 2007 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 0 0 0 2 NNE 0 0 1 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 2 3 5 SSE 0 1 12 2 4 19 S 0 1 9 5 5 20 SSW 1 3 12 13 29 SW 2 2 19 21 44 WSW 0 0 0 1 1 W 0 0 1 1 2 WNW 0 0 0 0 0 NW 0 0 0 0 0 NNW 0 1 3 0 4 Variable 0 0 0 0 0 Total 7 27 44 48 127 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3

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