Text

Annual Radiological Environmental Operating Report, January 1 - December 31, 2008
	ML091330363
Person / Time
Site:	Comanche Peak
Issue date:	04/03/2009
From:	Vaughan B; Luminant Generation Co, Luminant Power
To:	; Office of Nuclear Reactor Regulation
References
	TXX-09062, CP-200900568
	Download: ML091330363 (54)
	v • d • e

LUMINANT COMANCHE PEAK NUCLEAR POWER PLANT ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 2008 JANUARY 1, 2008 through DECEMBER 31, 2008 LUMINANT REVIEW and APPROVAL CREATED BY: Bonnie Vaughan Date Radiation Protection Technician REVIEWED BY:

Andrew Caves Date Sr. Nuclear Analyst APPROVED BY:

borah O'Connor Date Health Physics Supervisor I

Table of Contents Section Title

1. Introduction A. Site and Station Description page 5 B. Objectives and Overview of the CPNPP Radiological Environmental Monitoring Program page 5 II. Program Descriptions and Results A. Sample Locations page 7 Table I -- Comanche Peak Nuclear Power Plant Radiologrical Environmental Monitoring Program for 2008 Table 2 -- Key to Environmental Sampling Locations B. Direct Radiation Program page 11 Methods, Procedures and Result Summaries Exceptions to the Program Table 3 -- 2008 Environmental Direct Radiation Results Table 14 -- 2008 Environmental TLD Trend C. Airborne Program page 16 Methods, Procedures and Result Summaries Exceptions to the Program Table 4 -- 2008 Environmental Airborne Particulate Gross Beta Results Graph 1-- 2008 Environmental Air Sample Gross Beta Results -

Maximum and Minimum Table 5 -- 2008 Environmental Air Sample Iodine-131 Results Table 6 -- 2008 Environmental Air Particulate Composite Gamma Isotopic Results 2

D. Surface Water Program page 22 Methods, Procedures and Result Summaries Exceptions to the Program Table 7 -- 2008 Environmental Surface Water Tritium and Gamma Isotopic Results Graph 2-- 2008 Environmental Surface Water Tritium Results E. Surface Drinking Water Program page 26 Methods, Procedures and Result Summaries Exceptions to the Program Table 8 -- 2008 Environmental Surface Drinking,Water Tritium, Gross Beta and Gamma Isotopic Results Graph 3-- Squaw Creek Maximum Tritium Values Graph 4-- 2008 Environmental Surface Drinking Water Tritium Results Graph 5-- 2008 Environmental Surface Drinkin2 Water Gross Beta Results F. Groundwater Program page 31 Methods, Procedures and Result Summaries Exceptions to the Program Table 9 -- 2008 Environmental Groundwater Tritium and Gamma Isotopic Results G. Sediment Program page 33 Methods, Procedures and Result Summaries Exceptions to the Program Table 10 -- 2008 Environmental Sediment Gamma Isotopic Results H. Fish Program page 35 Methods, Procedures and Result Summaries Exceptions to the Program Table I I -- 2008 Environmental Fish Gamma Isotopic Results 3

1. Food Products Program page 37 Methods, Procedures and Result Summaries Exceptions to the Program Table 12 -- 2008 Environmental Food Products Gamma Isotopic Results J. Broadleaf Program page 39 Methods, Procedures and Result Summaries Exceptions to the Program Table 13 -- 2008 Environmental Broadleaf Iodine-131 and Gamma Isotopic Results K. Conclusions page 41 L. Inter Laboratory Comparison and Cross Check Program page 41 llI. Appendix A Comanche Peak Nuclear Power Plant Land Use Census 2008 page 43 4

1. Introduction Results of the Radiological Environmental Monitoring Program for the Comanche Peak Nuclear Power Plant (CPNPP) for the year 2008 are contained within this report. This report covers the period from January 1, 2008 through December 31, 2008 and summarizes the results of measurements and analysis of data obtained from environmental samples collected during this same timeframe.

A. Site and Station Description CPNPP consists of two pressurized water reactor units, each designed to operate at a power level of about 1250 megawatts (electrical). The Station is located on Squaw Creek reservoir in Somervell and Hood counties, about forty miles southwest of Fort Worth, Texas. Unit I received a low power operating license February 8, 1990 and achieved initial criticality on April 3, 1990. A full power license for Unit 1 was issued on April 17, 1990 and commercial operation was declared on August 13, 1990. Unit 2 achieved initial criticality on March 24, 1993 and synchronized to the electrical grid on April 9, '1993.

B. Objectives and Overviews of the CPNPP Radiological Environmental Monitoring Program The United States Nuclear Regulatory Commission (USNRC) regulations require that nuclear power plants be designed, constructed, and operated to keep levels of radioactive material in effluents to unrestricted areas as low as reasonably achievable (ALARA). To assure that these criteria are met, each license authorizing reactor operation includes technical specifications governing the release of radioactive effluents.

In-plant monitoring is used to assure that these predetermined release limits are not exceeded. However, as a precaution against unexpected and undefined processes that might allow undue accumulation of radioactivity in any sector of the environment, a program for monitoring the plant environs is also included.

Sampling locations were selected on the basis of local ecology, meteorology, physical characteristics of the region, and demographic and land use features of the site vicinity. The radiological environmental monitoring program was designed on the basis of the USNRC Branch Technical Position "An Acceptable Radiological Environmental Monitoring Program" on radiological environmental monitoring issued by the Radiological Assessment Branch, Revision 1 (November 1979), the

CPSESTechnical Specification "Comanche Peak Steam Electric Station Units I and 2 Technical Specifications" and the "CPSES Offsite Dose Calculation Manual" (ODCM).

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In 2008, the Radiological Environmental Monitoring Program included the following:

" The measurement of ambient gamma radiation by thermoluminescent dosimetry;

" The determination of airborne gross beta, gamma emitters, and Iodine-131;

The determination of tritium and gamma emitters in surface water;

The determination of gross beta, tritium, Iodine-13 1, and gamma emitters in drinking water;

The determination of tritium and gamma emitters in ground water;

The determination of gamma emitters in sediment and fish; o The determination of gamma emitters in food products and;

The determination of gamma emitters and Iodine- 131 in broadleaf vegetation.

The regulations governing the quantities of radioactivity in reactor effluents allow nuclear power plants to contribute, at most, only a small percentage increase above normal background radioactivity. Background levels at any one location are not constant but vary with time as they are influenced by external events such as cosmic ray bombardment, weapons test fallout, and seasonal variations. These levels also can vary spatially within relatively short distances reflecting variations in geological composition. To differentiate between background radiation levels and increases resulting from operation of CPNPP, the radiological surveys of the plant environs were divided into pre-operational and operational phases.

The pre-operational phase of the program provided a general characterization of the radiation levels and concentrations prevalent in these areas prior to plant operation along with an indication of the degree of natural variation to be expected. The operational phase of the program obtains data whichi, when considered along with the data obtained in the pre-operational phase, assists in the evaluation of the radiological impact of plant operation.

Pre-operational measurements were conducted at CPNPP from 1981 to 1989. These pre-operational measurements were performed to:

Evaluate procedures, equipment, and techniques;

Identify potentially important pathways to be monitored after plant operation;

Measure background levels and the variations along potentially important pathways;

Provide baseline data for statistical comparisons with future operational analytical results.

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The operational Radiological Environmental Monitoring Program is conducted to:

" Verify that measurable concentrations of radioactive materials and levels of radiation are not higher than expected on the basis of the effluent measurements and modeling of the environmental exposure pathways;

Verify the effectiveness of in-plant measures used for controlling the release of radioactive materials;

" Identify changes in the areas at and beyond the site boundary that may impact the principal pathways of exposure.

This report documents the seventeenth year of operational measurements and is submitted in accordance with the requirements of the CPSES Offsite Dose Calculation Manual, Part 1, Administrative Control 6.9.1.3.

HI. Program Descriptions and Results A. Sample Locations Within a radius of twenty miles of the CPNPP site there are seventy-two (72) sample locations included in the monitoring program for the year 2008. The number of sample points and the specific locations for the sample points were determined by considering locations where the highest off-site environmental concentrations have been predicted from plant effluent source terms, site hydrology, and site meteorological conditions.

Other factors considered were applicable regulations, population distribution, and ease of access to sampling stations, availability of samples atdesired locations, security and future program integrity.

Additionally an annual land use census is conducted to identify changes in the areas surrounding the plant. If changes are identified that impact the principle pathways of exposure, appropriate changes to the radiological environmental monitoring program are implemented. A copy of the report "Comanche Peak Nuclear Power Plant Land Use Census 2008" is provided in Appendix A to this report.

Table I - Comanche Peak Nuclear Power Plant Radiological Environmental Monitoring Program for 2008 contains a brief outline of the current program. This table specifies the sample media type, the number of locations for each media type, the sector and distance identifier for each sample location, the sample frequency, the type of analysis required and the analytical frequency required. ,b 7

Table 2 - Key To Environmental Sampling Locations provides a reference that links the sampling point designations used in procedures and forms to the appropriate physical sample location (sector and distance) and to the correct sample type. This cross-reference enhances the ability to review data and tie the data to the correct sample points and to ensure all samples are collected and analyzed as specified.

Currently there are no milk sample locations within ten miles of the CPNPP site and there are no milk sample locations within twenty miles that will participate in the environmental program. CPNPP already samples extra broadleaf locations as required due to no milk locations within the ten-mile radius therefore, no changes to the program are necessary. Milk sampling will be resumed if any future annual land use census determines a dairy has been established within the specified area.

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Table 1 - Comanche Peak Nuclear Power Plant Radiological Environmental Monitoring Program for 2008 Number of Sampling Analysis Analtical Media Locations Identification by Sector and Distance (miles) Frequency (a) Frequency (a)

N-1.45; N-4.4; N-6.5; N-9.4; NNE-I.1; NNE-5.65; NE-1.7; NE-4.8; ENE-2.5; ENE-5.0; E-0.5; E-1.9; E-3.5; E-4.2; ESE-1.4; ESE-4.7; SE-1.3; SE-3.85; SE-4.6; SSE-1.3; SSE-4.4; SSE-4.5; Gamma 43 S-1.5; S-4.2; SSW-1.1; SSW-4.4; SW-0.9; Q, A Thermoluminescent Q, A Exposure SW-4.8; SW-12.3; WSW-1.0; WSW-5.35; Dosimetry WSW-7.0; W-1.0; W-2.0; W-5.5; WNW-1.0; WNW-5.0; WNW-6.7; NW-1.0; NW-5.7; NW-9.9; NNW-1.35; NNW-4.6 Gross Beta Air Particulate N-9.4; E-3.5; SSE-4.5; SW-12.3; NW-1.0; Gamma Isotopic Filter W Air Iodine 8 N-1.45; SW/WSW-0.95; S/SSW-1.2 W Gamma Isotopic QC Charcoal W Surface Water 4 N-19.3; ESE-1.4; N-1.5; NE-7.4 M(b) Gamma Isotopic M Tritium QC Gross Beta M Surface 2 NNW-0.1; N-9.9 M(c) Gamma Isotopic M Water/Drinking Iodine-131 M Tritium QC Ground Water 5 SSE-4.6; W-1.2; WSW-0.1; N-9.8; N-1.45 Q Gamma Isotopic Tritium Q Sediment 4 N-9.9; NNE-1.0; NE-7.4; SE-5.3 SA Gamma Isotopic SA Fish 2 - NNE-8.0; ENE-2.0 SA Gamma Isotopic SA Food Products 1 ENE-9.0 MH Gamma Isotopic MH Iodine-131 MH Broadleaf Vegeat 3 N-1.45; SW-I.0; SW-13.5 M Gamma Isotopic M Vegetation (a) Frequency codes are: W-Weekly; M-Monthly; Q-Quarterly; QC-Quarterly Composite; MH-Monthly at Harvest; SA-Semiannual; A-Annual (b) Surface water samples from Squaw Creek are monthly composites of weekly grab samples. Surface water samples from Lake Granbury are monthly grab samples.

(c) Surface water drinking samples are a monthly composite of weekly grab samples.

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Table 2 Key To Environmental Sampling Locations SAMPLING LOCATION SAMPLE SAMPLING LOCATION SAMPLE POINT (SECTOR-MILE) TYPE* POINT (SECTOR-MILE) TYPE*

Al N-1.45 A R29 SW-i12.3 R A2 N-9.4 A R30 WSW-1.0 R A3 E-3.5 A R31 WSW-5.35 R A4 SSE-4.5 A R32 WSW-7.0 R A5 S/SSW-1.2 A R33 W-1.0 R A6 SW-12.3 A R34 W-2.0 R A7 SW/WSW-0.95 A R35 W-5.5 R A8 NW-1.0 A R36 WNW-1.0 R RI N-1.45 R R37 WNW-5.0 R R2 N-4.4 R R38 WNW-6.7 R R3 N-6.5 R R39 NW-1.0 R R4 N-9.4 R R40 NW-5.7 R R5 NNE- 1.1 R R41 NW-9.9 R R6 NNE-5.65 R R42 NNW-1.35 R R7 NE-1.7 R R43 NNW-4.6 R R8 NE-4.8 R SW1 N-1.5 SW R9 ENE-2.5 R SW2 N-9.9 SW/DW RIO ENE-5.0 R SW3 N- 19.9 SW Rll E-0.5 R SW4 NE-7.4 SW R12 E-1.9 R SW5 ESE-1.4 SW R13 E-3.5 R SW6 NNW-0. 1 SW/DW R14 E-4.2 R GWl W-1.2 GW/DW R15 ESE- 1.4 R GW2 WSW-0.1 GW/DW R16 ESE-4.7 R GW3 SSE-4.6 GW/DW R17 SE-1.3 R GW4 N-9.8 GW/DW R18 SE-3.85 R GW5 N-i1.45 GW/DW R19 SE-4.6 R SS1 NNE-1.0 SS R20 SSE-1.3 R SS2 N-9.9 SS R21 SSE-4.4 R SS3 NE-7.4 SS R22 SSE-4.5 R SS4 SE-5.3 SS R23 S-1.5 R F1 ENE-2.0 F R24 S-4.2 R F2 NNE-8.0 F R25 SSW-I.I R FPI ENE-9.0 FP R26 SSW-4.4 R BLI N-1.45 BL R27 SW-0.9 R BL2 Sw-1.0 BL R28 SW-4.8 R BL3 SW-13.5 BL Sample Type* A - AIR SAMPLE GW - GROUND WATER F - FISH R - DIRECT RADIATION SS - SHORELINE SEDIMENT FP - FOOD PRODUCT SW - SURFACE WATER BL - BROADLEAF VEGETATION DW - DRINKING WATER 10

B. Direct Radiation Thermoluminescent dosimeters (TLDs) were used to determine the direct (ambient) radiation levels at the designated monitoring locations. The monitoring locations were chosen according to the criteria given in the USNRC Branch Technical Position on Radiation Monitoring (Revision 1, November 1979). The area around the station was divided into 16 radial sectors of 22-1/2 degrees each, corresponding to the cardinal points of the compass. TLDs were placed in each of these sectors. The thermoluminescent dosimeters were placed in two rings around the station.

An inner ring was located as close as possible to the site boundary and an outer ring was located at a distance of 4 to 6 miles from the station. Eleven additional TLDs were located at points of special interest, including two control locations. For routine direct radiation measurements, two sets of the Panasonic CaSO4:Dy TLDs were used at each of the 43 monitoring locations. One set of TLDs was exchanged on a quarterly basis and a second set of TLDs was exchanged on a yearly basis. Additional sets of in-transit TLD's were used as control TLDs for the quarterly and annual TLDs.

The thermoluminescent dosimeters were processed on-site by CPNPP National Voluntary Laboratory Accreditation Program (NVLAP) Certified dosimetry personnel. Individual dosimeters were calibrated by exposure to an accurately known radiation field from a certified Cs-137 source. The year 2001 was the first year that CPNPP used the Panasonic TLD System to supply all the required direct radiation (ambient) monitoring. Dosimetry data for the year 2008 provided consistent results in support of the year 2001 dosimetry results previously obtained with the onsite dosimetry processing system.

D. C. Oakley's report "National Radiation Exposure in the United States",

published in 1972, calculated a background radiation dose rate equivalent of 0.22 mr/day for the area surrounding Fort Worth, Texas. This calculated value varies widely with changes in location but represents an appropriate reference value to compare with actual measured TLD doses.

Using data from the pre-operational program for the two years prior to the startup of Unit 1, the quarterly TLDs averaged a calculated dose rate of 0.14 mr/day while the yearly TLDs averaged a calculated dose rate of 0.16 mr/day. The range of measured values from this same two-year period varied from aminirnum of 0. 11 mr/day to a maximum of 0.22 mr/day.

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Table 3 - 2008 Environmental Direct Radiation Results contains the measured dose (mr) for each quarterly TLD from each of the 43 monitoring locations. The corresponding quarterly calculated dose rate (mr/day) values are listed as well. The statistical average doses (mr) and dose rate (mr/day) values for each set of quarterly TLDs is also displayed.

Additionally, the table includes the total dose (nr) of all four quarters for each specific location. The table also includes the measured dose (mr) for each annual TLD from each of the 43 monitoring locations. The corresponding annual calculated dose rate (mr/day) values are listed as well. The statistical annual average dose (mr) for the entire set of annual TLDs is reported along with the average dose rate (mr/day) for the entire set of annual TLDs.

For the year 2008, the statistical average dose rate of all the quarterly TLD's was 0.0581 mr/day. The quarterly measured dose rates ranged from a minimum of 0.0005 mr/day to a maximum of 0.1264 mr/day. The statistical average dose rate of all the annual TLDs was 0.0600 mr/day.

The annual measured dose rates ranged from a minimum of 0.000 mr/day to a maximum of 0.1640 mr/day. There was good agreement between the sum of the measured doses of the individual quarterly TLDs and the measured dose of the annual TLDs. The summation of the individual quarterly measured doses averaged 20.76 mr for all the forty three monitoring stations while the annual measured dose averaged 20.30 mr for all the monitoring stations.

Comparing the pre-operational data and operational data collected through the year 2008 did not produce any anomalies. The direct radiation dose data for 2008 was consistently lower than previous years of data during both the pre-operational program and the previous years of the operational program. The implementation of the Panasonic TLD system and the algorithms used to process the data from this new type TLDs accounts for the lower values as well as different type holders for the TLD's.

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During the year 2008, there were two exception to the Direct Radiation Program.

For the first quarter of 2008, all quarterly TLD's were collected with the exception of R19, R6, R32, and R26. Also annual TLD's R26 and R32 were missing. All second quarter TLD's were placed in service on 3/27/08 with the exception of R7, R5, and R42. Due to weather conditions, the lake was inaccessible on that day. R7, R5, and R42 were placed in service on 4/1/08. New annual TLD's for R26 and R32 were placed in service on 4/1/08.

Two additional quarterly TLD's (R19 and R26) were found to be missing and were replaced on 4/5/08.

Smart form 2008-000939 was written.

For the second quarter of 2008, all TLD's were collected with the exception of R19 and R21. Annual TLD's for these locations were also missing. Quarterly TLD's were placed in service on 6/30/08 and annual TLD's were placed in service on 7/1/08.

Smart form 2008-002176 was written.

No abnormal quarterly results were obtained by either CPNPP or by the State of Texas, Bureau of Radiation Control.

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Table 3 - 2008 Environmental Direct Radiation Results (Units of mr dose and mr/day dose rate) 1ST 2ND 3RD 4TH QTR Average QTR Average QTR Average QTR Average QTR Annual Average Location Total Mr/day Total mr/day Total mr/day Total mr/day Total Total mr/day N-1.45 5.1 0.0561 5.4 0.0588 3.4 0.0364 4.40 0.0453 18.30 19.10 0.052 N-4.4 7.7 0.0856 7.2 0.0791 5.0 0.0538 8.30 0.0859 28.20 30.95 0.084 N-6.5 5.2 0.0578 5.6 0.0615 4.5 0.0484 5.70 0.0594 21.00 21.15 0.057 N-9.4 6.4 0.0706 5.8 0.0637 4.5 0.0484 6.60 0.0688 23.30 22.40 0.061 NNE-1.1 1.0 0.0102 1.7 0.0198 0.7 0.0071 2.00 0.0203 5.40 4.15 0.011 NNE-5.65 6.4 0.0698 5.7 0.0614 6.10 0.0635 18.20 22.35 0.061 NE-1.7 0.8 0.0086 0.5 0.0052 0.6 0.0060 1.20 0.0120 3.10 4.35 0.012 NE-4.8 6.4 0.0711 4.2 0.0456 4.1 0.0440 6.40 0.0661 21.10 20.20 0.055 ENE-2.5 7.9 0.0872 8.0 0.0879 7.1 0.0766 9.20 0.0958 32.20 30.25 0.082 ENE-5.0 10.1 0.1122 8.9 0.0973 8.3 0.0902 11.00 0.1141 38.30 36.75 0.100 E-0.5 6.5 0.0717 6.6 0.0725 6.9 0.0745 7.30 0.0760 27.30 22.30 0.060 E-1.9 4.3 0.0478 3.5 0.0385 3.6 0.0386 4.40 0.0453 15.80 14.70 0.040 E-3.5 9.4 0.1039 8.2 0.0896 9.1 0.0984 10.30 0.1073. 37.00 37.60 0.102 E-4.2 7.6 0.0839 6.2 0.0681 7.0 .0.0755 9.20 0.0958 30.00 31.25 0U085 ESE-1.4 5.3 0.0589 5.2 0.0571 4.8 0.0522 5.80 0.0604 .21.10 20.95 0.057 ESE-4.7 7.7 0.0850 7.2 0.0786 6.6 0.0717 8.30 0.0865 29.80 22.20 0.060 SE-1.3 6.3 .0.0694 7.3 0.0802 7.1 0.0766 7.10 0.0734 27.80 25.50 0.069 SE-3.85 5.0 0.0556 4.3 0.0473 2.9 0.0315 5.20 0.0542 17.40 19.60 0.053 SE-4.6 4.0 0.0435 5.40 0.0563 9.40 10.50 0.057 SSE-1.3 4.6 0.0506 5.6 0.0615 3.5 0.0375 5.90 0.0609 19.60 20.45 0.055 SSE-4.4 6.9 0.0761 4.9 0.0527 6.70 0.0698 18.50 .12.75 0.070 SSE-4.5 5.5 0.0606 6.0 0.0654 5.0 0.0652 6.00 0.0620 23.50 21.60 0.059 S-1.5 5.3 0.0589 4.4 0.0484 4.3 0.0467 4.30 0:0443 18.30 16.40 0.044 S-4.2 4.9 0.0544 4.3 0.0473 4.3 0.0462 5.70 0.0589 19.20 21.35 0.058 SSW-1.1 6.1 0.0672 5.0 0.0544 5.2 0.0560 6.00 0.0625 22.30 24.00 0.065 SSW-4.8 4.9 0.0598 4.9 0.0533 6.20 0.0646 16.00 17.90 0.065 SW-0.9 4.8 0.0528 5.0 0.0544 4.1 0.0440 5.40 0.0563 19.30 17.00 0.046 SW-4.8 3.6 0.0400 4.7 0.0511 4.6 0.0500 5.50 0.0573 18.40 18.40 0.164 SW-12.3 Control 5.2 0.0578 4.7 0.0516 4.4 0.0478 6.80 0.0703 21.10 21.50 0.058 WSW-1.0 6.2 0.0689 11.5 0.1264 5.8 0.0625 7.10 0.0734 30.60 24.45 0.066 WSW-5.35 5.3 0.0589 4.4 0.0484 3.2 0.0348 4.80 0.0500 17.70 18.05 0.049 WSW-7.0 Control 4.2 0.0462 5.3 0.0576 6.20 0.0641 15.70 15.00 0.055 W-1.0 3.7 0.0406 3.8 0.0412 2.6 0.0277 4.30 0.0443 14.40 14.45 0.039 W-2.0 3.4 0.0378 3.5 0.0385 2.6 0.0283 4.40 0.0453 13.90 12.60 0.034 W-5.5 4.0 0.0439 3.5 0.0379 3.2 0.0348 4.80 0.0495 15.50 19.35 0.052 WNW-1.0 8.1 0.0900 5.7 0.0626 6.3 0.0679 6.50 0.0672 26.60 24.35 0.066 WNW-5.0 5.5 0.0606 6.7 0.0731 4.7 0.0511 6.50 0.0672 23.40 24.20 0.066 WNW-6.7 5.3 0.0589 3.8 0.0457 4.6 0.0495 6.00 0.0625 19.70 24.60 0.059 NW-1.0 4.9 0.0544 4.3 0.0473 4.3 0.0462 5.10 0.0531 18.60 18.75 0.051 NW-5.7 5.0 0.0550 5.5 0.0604 6.0 0.0652 6.30 0.0656 22.80 25.25 0.068 NW-9.9 5.7 0.0628 5.5 0.0604 4.6 0.0500 5.40 0.0557 21.20 19.25 0.052 NNW-1.35 0.7 0.0070 7.9 0.0919 0.1 0.0011 1.00 0.0099 9.70 0.00 0.000 NNW-4.6 7.2 0.0800 0.1 0.0005 7.5 0.0815 7.00 0.0729 21.80 27.95 0.076 AVERAGES 5.50 0.0608 5.30 0.0584 4.72 0.0510 5.99 0.0621 20.76 20.37 '0.060 14

Location 201 2002 2003 2004 2005 2006 2007 2008 % Diff 2008 2001-2007 % Diff to 2007 mR Avg 2008 to Average R1 19.55 16.75 19.60 18.9 20.1 18.85 15.85 19.1 19% 18.51 3%

R2 32.75 29.25 32.30 33.7 30.05 28.55 24.6 30.95 23% 30.17 3%

R3 22.65 19.60 24.15 23.2 23.25 21.1 20.6 21.15 3% 22.08 -4%

R4 22.60 21.00 26.10 25.75 23.2 25.15 19.85 22.4 12% 23.38 -4%

R5 N/A 15.40 19.05 21.9 4.95 6.9 3.25 4.15 24% 11.91 -97%

R6 22.75 22.55 N/A 27.65 23.15 25.55 19.5 22.35 14% 23.53 -5%

R7 17.40 16.95 18.25 18.7 8.4 5.4 4.2 4.35 4% 12.76 -98%

R8 27.15 23.80 24.10 25.5 23.7 21.75 17.2 20.2 16% 23.31 -14%

R9 35.90 28.50 30.30 32.6 29.2 25.65 24.1 30.25 23% 29.46 3%

R10 41.85 36.20 41.90 41 36 40.6 35.65 36.75 3% 39.03 -6%

R11 29.80 22.75 26.15 29.45 25.65 29.5 26.85 22.3 -19% 27.16 -20%

R12 13.05 9.15 10.20 33.8 16 14.9 12.55 14.7 16% 15.66 -6%

R13 39.90 31.30 55.40 37.25 35.25 36.85 33.4 37.6 12% 38.48 -2%

R14 33.75 27.60 29.15 32.45 27.3 27.35 25.5 31.25 20% 29.01 7%

R15 21.30 16.95 20.55 21.5 17 21.5 16.8 20.95 22% 19.37 8%

R16 32.05 25.40 28.35 28.55 28.4 27.05 22.15 22.2 0% 27.42 -21%

R17 28.25 27.00 29.45 31.3 28.85 28.1 22.05 25.5 15% 27.86 -9%

R18 17.85 15.70 19.75 19.35 17.2 20.95 17.2 19.6 13% 18.29 7%

R19 20.25 21.70 21.85 20.7 18.95 18.75 15.8 10.5 -40% 19.71 -61%

R20 21.70 16.75 18.25 22.65 17.9 19.75 18.8 20.45 8% 19.40 5%

R21 21.75 21.15 25.15 24.25 22.15 23.25 22.35 12.75 -55% 22.86 -57%

R22 20.15 17.75 21.50 22 18.25 23.8 19.85 21.6 8% 20.47 5%

R23 17.95 18.95 16.60 18.85 17.3 16.85 15.45 16.4 6% 17.42 -6%

R24 18.10 17.55 21.10 25.45 19.85 19.85 16.6 21.35 19.79 8%

R25 17.20 19.00 17.30 19.5 22.65 23.35 19.05 24 23% 19.72 20%

R26 23.50 25.80 N/A 20.5 18.7 21.15 18.85 17.9 -5% 21.42 -18%

R27 N/A 22.30 18.50 22.55 16.15 19.35 18.2 17 -7% 19.51 -14%

R28 18.05 16.20 20.85 14 15.6 4.35 14.75 18.4 22% 14.83 21%

R29 21.50 21.75 24.10 24.4 22.2 21.2 19.2 21.5 11% 22.05 -3%

R30 N/A 25.45 22.45 28.35 23.3 25.05 18.6 24.45 23.87 2%

R31 19.75 18.70 23.05 24.7 20.55 21.2 17.65 18.05 2% 20.80 -14%

R32 22.20 25.60 26.65 25.1 27.8 27.45 19.95 15 -28% 24.96 -50%

R33 10.15 13.10 13.40 14.75 13.75 13.75 9.05 14.45 12.56 14%

R34 21.15 11.90 13.70 13.9 13.4 14.85 10.1 12.6 22% 14.14 -12%

R35 18.45 14.65 18.00 17.95 19.4 16.1 14.4 19.35 16.99 13%

R36 24.95 25.50 25.60 28.55 26.5 26.2 21.15 24.35 14% 25.49 -5%

R37 21.35 22.85 23.45 22.95 24.15 24.55 19.65 24.2 21% 22.71 6%

R38 22.00 21.10 23.65 23.1 20.1 22.95 18.55 21.6 15% 21.64 0%

R39 17.45 19.20 21.35 24.2 16.95 19.5 16.05 18.75 16% 19.24 -3%

R40 23.75 19.20 23.45 20.9 24.45 22.6 19.2 25.25 21.94 14%

R41 17.15 14.95 17.35 19.65 17.7 18.15 17.8 19.25 8% 17.54 9%

R42 2.05 5.20 6.70 5.95 1.35 8 0.7 0 -200% 4.28 -200%

R43 29.45 23.95 30.40 30.9 24.95 28.1 28.65 27.95 -2% 28.06 0%

R5 - All reading low, elements could have been wet Legend: < 50% Lower R7 - All reading low, elements could have been wet R12 - Anomalous reading from 2004 1 R28 - Missing 2nd issue (4/21/06 - 12/29/06)

R30-Anomalous low reading from 2007 1_ _

R42 - Consistently low readings result in poor statistics R26, 32--Placed in serive on 3/31/08 R19, 21 - Placed in service on 7/1/08 R28 - Placed in service on 9/10/08 15

C. Airborne Program Air particulate and air iodine samples were collected each week from the eight monitoring locations described in Table 1 - Comanche Peak Nuclear Power Plant Radiological Monitoring Program for 2008. Each air particulate sample was collected by drawing air through a 47 millimeter-diameter glass-fiber filter. Air iodine was collected by drawing air through a TEDA impregnated charcoal cartridge which was connected in series behind the air particulate filter. Shipped to an independent laboratory, air particulate filters were analyzed weekly for gross beta activity and were composited quarterly for gamma spectrometry analysis.

Charcoal cartridges were analyzed weekly for Iodine- 131.

For the year 2008, a total of 424 air particulate filters were collected and analyzed for gross beta activity. The reported gross beta activity ranged from a minimum value of 1.16E-02 pCi/m 3 to a maximum value of 8.12E-02 pCi/m 3 .' Table 4 - 2008 Environmental Airborne Particulate Gross Beta Results contains the reported values of all samples. There were no anomalies noted in the data reported for 2008 when compared to pre-operational and previous operational data. Graph I - 2008 Environmental Air Sample Gross Beta Results - Maximum and Minimum trends the weekly high and low gross beta values to show the seasonal variation of the results as well as providing indication of consistency between the individual monitoring locations.

A total of 424 charcoal cartridges were analyzed for airborne Iodine- 13 1.

No Iodine-131 was detected at any of the eight monitoring locations.

Table 5 - 2008 Environmental Air Sample Iodine- 131 Results contains the reported values of each Iodine-131 analysis, all of which are less than the required lower limit of detection (LLD).

All air particulate filters were collected and composited quarterly and then analyzed by gamma spectrometry. The gamma isotopic data is presented in Table 6 - 2008 Environmental Air Particulate Composite Gamma Isotopic Results. Typical of pre-operational and previous operational data results, the only radioactive nuclide identified in all the samples was cosmogenic Beryllium-7, a naturally occurring isotope.

During the year 2008 there was one exception to the Airborne Program.

On sample collection date 3/4/08, Station A-8 and A-2 were found not running. Smart form 2008-000678 was written. LLD for Station A-2 was met. LLD for Station A-8 was not met.

A review of all the State of Texas air sample data indicated no anomalies.

16

Table 4 -- 2008 Environmental Airborne Particulate Gross Beta Results (Units of pCi/m3)

Location NW-1.0 SWISW-O-.95 SISSW-1.2 SW-12.3 SSE-4.5 E-3.5 N-1.45 N-9.4 Date Control Control 1/1/2008 4.06e-02 3.97e-02 3.84e-02 4.57e-02 4.17e-02 3.94e-02 3.53e-02 4.16e-02 1/8/2008 1.92e-02 1.92e-02 1.83e-02 2.09e-02 2.03e-02 2.29e-02 2.1le-02 2.25e-02 1/15/2008 2.36e-02 2.87e-02 2.87e-02 2.54e-02 2.86e-02 3.73e-02 3.12e-02 3.47e-02 1/22/2008 3.05e-02 2.92e-02 2.31e-02 2.47e-02 3.35e-02 2.92e-02 3.12e-02 3.01e-02 1/29/2008 4.6.1e-02 4.88e-02 3.85e-02 5.16e-02 5.09e-02 4.82e-02 5.09e-02 4.86e-02 2/5/2008 3.00e-02 3.28e-02 2.82e-02 3.36e-02 3.28e-02 3.55e-02 3.12e-02 3.41e-02 2/12/2008 3.26e-02 4.27e-02 3.00e-02 4.05e-02 4.24e-02 3.85e-02 3.81e-02 4.50e-02 2/19/2008 3.16e-02 3.36e-02 2.59e-02 3.04e-02 2.68e-02 3.31e-02 3.13e-02 3.42e-02 2/26/2008 3.95e-02 5.23e-02 3.71e-02 4.66e-02 4.95e-02 4.87e-02 4.13e-02 4.98e-02 3/4/2008 3.65e-02 3.23e-02 2.20e-02 3.1Oe-02 3.14e-02 2.74e-02 2.91e-02 3.75e-02 3/11/2008 2.95e-02 2.64e-02 2*19e-02 2.73e-02 2.74e-02 3.08e-02 2.81e-02 3.42e-02 3/18/2008 3.45e-02 2.98e-02 2.74e-02 3.48e-02 3.43e-02 3.17e-02 3.14e-02 3.96e-02 3/25/2008 3.1Oe-02 3.05e-02 2.81 e-02 4.44e-02 3.40e-02 3.25e-02 3.12e-02 3.42e-02 4/1/2008 2.87e-02 2.80e-02 2.95e-02 3.78e-02 3.00e-02 3.05e-02 2.79e-02 3.49e-02 4/8/2008 2.85e-02 3.02e-02 2.42e-02 4.19e-02 2.64e-02 2.74e-02 2.62e-02 2.86e-02 4/15/2008 2.96e-02 2.43e-02 2.46e-02 4.1Oe-02 2.54e-02 2.67e-02 2.66e-02 3.09e-02 4/22/2008 3.49e-02 2.77e-02 2.65e-02 5.02e-02 3.33e-02 3.34e-02 3.31e-02 3.38e-02 4/29/2008 3.49e-02 2.43e-02 2.26e-02 4.69e-02 2.88e-02 3.4e-02 3.14e-02 3.38e-02 5/6/2008 3.26e-02 2.85e-02 2.34e-02 4.36e-02 2.49e-02 2.97e-02 3.05e-02 3.44e-02 5/13/2008 3.03e-02 2.5e-02 2.58e-02 4.71e-02 2.7e-02 2.81e-02 2.91e-02 3.28e-02 5/20/2008 2.49e-02 2.53e-02 2.0e-02 4.13e-02 2.67e-02 2.8e-02 3.12e-02 2.98e-02 5/27/2008 2.2e-02 1.93e-02 1.94e-02 4.2e-02 2.31 e-02 2.74e-02 2.39e-02 2.38e-02 6/3/2008 1.94e-02 1.87e-02 1.72e-02 3.51 e-02 2.13e-02 2.2e-02 2.49e-02 2.32e-02 6/10/2008 1.75e-02 1.49e-02 1.36e-02 1.66e-02 1.46e-02 1.51e-02 1.16e-02 1.78e-02 6/17/2008 1.76e-02 1.31e-02 1.62e-02 2.19e-02 1.65e-02 1.84e-02 1.88e-02 2.29e-02 6/24/2008 2.59e-02 2.55e-02 2.24e-02 7.52e-02 2.71e-02 2.94e-02 2.91e-02 2.98e-02 7/1/2008 2.48e-02 2.39e-02 2.03e-02 2.53e-02 2.71e-02 2.64e-02 2.12e-02 2.96e-02 7/8/2008 2.53e-02 2.48e-02 2. le-02 2.42e-02 2.56e-02 2.65e-02 2.53e-02 2.41e-02 7/15/2008 2.57e-02 2.58e-02 2.26e-02 2.63e-02 2.65e-02 2.35e-02 2.34e-02 2.75e-02 7/22/2008 3.32e-02 3.05e-02 2.93e-02 2.76e-02 2.94e-02 3.05e-02 2.7e-02 2.87e-02 7/29/2008 3.02e-02 2.73e-02 2.87e-02 3.16e-02 3.32e-02 3.09e-02 2.55e-02 3.31e-02 8/5/2008 3.0e-02 3.25e-02 2.31e-02 2.39e-02 2.77e-02 3.26e-02 2.86e-02 2.86e-02 8/1212008 1.96e-02 2.37e-02 2.56e-02 2.38e-02 2.35e-02 2.22e-02 2.08e-02 2.47e-02 8/19/2008 2.7e-02 2.69e-02 2.9e-02 3.2e-02 2.42e-02 3.12e-02 2.91e-02 2.98e-02 8/26/2008 2.58e-02 2.4e-02 2.52e-02 2.09e-02 2.72e-02 2.45e-02 2.19e-02 2.62e-02 9/2/2008 3.27e-02 3.74e-02 2.86e-02 3.94e-02 3.61e-02 3.62e-02 3.18e-02 4.05e-02 9/9/2008 2.28e-02 2.6e-02 2.57e-02 2.47e-02 2.45e-02 2.51e-02 2.46e-02 2.66e-02 9/16/2008 1.6e-02 1.29e-02 1.87e-02 1.98e-02 2.18e-02 2.29e-02 1.91e-02 2.34e-02 9/23/2008 3.29e-02 4.1e-02 3.72e-02 3.89e-02 4.58e-02 4.09e-02 3.43e-02 4.2e-02 9/30/2008 4.99e-02 5.55e-02 5.51e-02 5.89e-02 6.26e-02 6.73e-02 5.47e-02 6.99e-02 10/7/2008 3.69e-02 4.39e-02 4.22e-02 4.19e-02 4.55e-02 4.97e-02 4.06e-02 4.97e-02 10/14/2008 2.86e-02 2.94e-02 3.0e-02 3.27e-02 3.19e-02 3.34e-02 3.33e-02 3.0e-02 10/21/2008 3.49e-02 3.54e-02 3.26e-02 3.09e-02 3.99e-02 3.53e-02 3.79e-02 4.15e-02 10/28/2008 3.12e-02 3.07e-02 3.05e-02 3.14e-02 3.28e-02 3.7e-02 3.1 le-02 3.37e-02 11/4/2008 3.29e-02 3.93e-02 4.15e-02 3.82e-02 4.59e-02 4.37e-02 3.95e-02 4.62e-02 11/11/2008 1.95e-02 2.33e-02 2.18e-02 2.1e-02 2.73e-02 2.5e-02 2.1le-02 2.66e-02 11/18/2008 2.28e-02 2.12e-02 2.66e-02 2.21e-02 2.59e-02 2.06e-02 2.16e-02 2.65e-02 11/25/2008 4.51e-02 4.57e-02 3.91e-02 4.25e-02 4.4e-02 4.38e-02 4.72e-02 4.79e-02 12/2/2008 6.92e-02 6.58e-02 4.95e-02 6.69e-02 6.49e-02 7.46e-02 7.43e-02 8.12e-02 12/9/2008 3.95e-02 4.27e-02 2.92e-02 3.92e-02 3.27e-02 4.18e-02 3.41e-02 4.97e-02 12/16/2008 3.99e-02 4.1e-02 2.82e-02 3.53e-02 3.93e-02 3.74e-02 3.42e-02 3.84e-02 12/23/2008 5.98e-02 4.89e-02 4.04e-02 4.98e-02 5.41e-02 5.23e-02 4.79e-02 5.02e-02 12/30/2008 3.49e-02 3.41e-02 3.1 le-02 2.65e-02 3.26e-02 3.58e-02 2.82e-02 3.15e-02 Required LLD's 1.OOE-02 17

Graph 1 -- 2008 Environmental Air Sample Gross Beta Results - Maximum and Minumum 9.OOiE-02 8.OOE-02 7.OOE-02 E 6.00 E-02 5.00E-02 MaximumI 0

4.OOE-02 3.OOE-02 2.OOE-02 1.OOE-02 0.OOE+00 5 9 13 17 21 25 29 33 37 41 45 49 53 Weekly Data Points

/

18

Table 5 - 2008 Environmental Air Sample Iodine-131 Results (Units of pCi/m3) -

NW-1.0 SWIWSW-0.95 S/SSW-1.2 SW-12.3 SSE-4.5 E-3.5 N-1.45 N-9.4 Date Control Control 1/1/2008 <5.1E-02 <5.9E-02 <4.8E-02 <5.6E-02 <6.2E-02 <5.7E-02 <5.3E-02 <6.1E-02 1/8/2008 <3.6E-02 <3.2E-02 <3.8E-02 <3.3E-02 <3.3E-02 <4.OE-02 <3.4E-02 42.9E-02 1/1512008 <5.5E-02 <5.4E-02 <6.5E-02 <6.6E-02 <6.3E-02 <4.2E-02 <4.2E-02 <4.3E-02 1/22/2008 <6.2E-02 <4.6E-02 <5.3E-02 <6.8E-02 <5.QE-02 <5.3E-02 <5.9E-02 <4.3E-02 1/2912008 <6.OE-02 <6.1 E-02 <6.7E-02 <5.8E-02 <6.5E-02 <5.1 E-02 <6.7E-02 <6.5E-02 2/5/2008 <4.2E-02 <4.3E-02 <3.4E-02 <3.7E-02 <4.3E-02 <4.OE-02 <3.6E-02 <4.4E-02 2/12/2008 <4.OE-02 <4.OE-02 <2.8E-02 <3.7E-02 <3.5E-02 <4.6E-02 <4.6E-02 <4.1 E-02 2/19/2008 <5.3E-02 <3.8E-02 <4.8E-02 <4.7E-02 <4.6E-02 <5.4E-02 <4.7E-02 <4.9E-02' 2/26/2008 <4.7E-02 <4.5E-02 <5.2E-02 <5.2E-02 <3.7E-02 <3.9E-02 <4.OE-02 <4.2E-02 3/4/2008 <5.7E-02 <4.9E-02 <3.4E-02 <5.2E-02 <4.7E-02 <4.9E-02 <4.3E-02 <5.5E-02 3/11/2008 <3.5E-02 <4.6E-02 <4.2E-02 <4.OE-02 <4.4E-02 <4.8E-02 <3.OE-02 <4.OE-02 3/18/2008 <6.3E-02 <5.7E-02 <6.OE-02 <6.6E-02 <5.1 E-02 <5.3E-02 <5.1 E-02 <5.9E-02 3/25/2008 <4.6E-02 <5.7E-02 <5.9E-02 <6.5E-02 <5.3E-02 <6.5E-02 <5.3E-02 <5.7E-02 4/1/2008 <4.8E-02 <4.2E-02 <4.6E-02 <4.OE-02 <4.1 E-02 <4.1 E-02 <4.6E-02 <5.3E-02 4/8/2008 <4.3E-02 <4.OE-02 <2.3E-02 <3.7E-02 <3.4E-02 <3.OE-02 <3.9E-02 <4.6E-02 4/15/2008 <2.3E-02 <4.2E-02 <3.7E-02 <3.8E-02 <3.2E-02 <2.8E-02 <4.6E-02 <4.OE-02 4/22/2008 <3.9E-02 <4.6E-02 <5.1E-02 <5.7E-02 <4.3E-02 <4.4E-02 <4.9E-02 <5.OE-02 4/29/2008 <5.6E-02 <6.5E-02 <5.4E-02 <6.7E-02 <5.3E-02 <5.OE-02 <5.7E-02 <6.2E-02 5/6/2008 <2.9E-02 <2.7E-02 <4.1E-02 <5.3E-02 <4.9E-02 <5.4E-02 <3.9E-02 <4.3E-02 5/13/2008 <4.8E-02 <4.8E-02 <3.OE-02 <3.9E-02 <3.9E-02 <4.1E-02 <3.8E-02 <4.2E-02 5/20/2008 <4.6e-02 <4.8e-02 <4.4e-02 <4.2e-02 <4.4e-02 <5.2e-02 <5.0e-02 <4.1 e-02 5/27/2008 <3.7e-02 <3.8e-02 <4.8e-02 <3.8e-02 <3.7e-02 <3.7e-02 <3.3e-02 <4.0e-02 6/3/2008 <5.3e-02 <3.5e-02 <4.9e-02 <4.9e-02 <3.3e-02 <6.5e-02 <4.9e-02 <4.4e-02 6/10/2008 <3.6e-02 <2.7e-02 <3.4e-02 <2.8e-02 <3.le-02 <3.6e-02 <3.l e-02 <2.5e-02 6/17/2008 <3.7e-02 <3.3e-02 <4.1e-02 <3.3e-02 <3.8e-02 <4.2e-02 <5.8e-02 <3.8e-02 6/24/2008 <4.6e-02 <5.0e-02 <4.2e-02 <6.5e-02 <5.0e-02 <4.5e-02 <3.4e-02 <4.2e-02 7/1/2008 <4.4e-02 <6.0e-02 <4.7e-02 <5.8e-02 <5.5e-02 <5.8e-02 <3.6e-02 <6.1 e-02 7/8/2008 <2.8e-02 <3.5e-02 <3.6e-02 <3.9e-02 <5.2e-02 <4.7e-02 <3.8e-02 <4.9e-02 7/15/2008 <5.5e-02 <5.6e-02 <6.4e-02 <6.7e-02 <6.7e-02 <6.4e-02 <6.0e-02 <5.1 e-02 7/22/2008 <4.2e-02 <3.6e-02 <3.5e-02 <4.6e-02 <3.5e-02 <5.0e-02 <3.9e-02 <4.4e-02 7/29/2008 <5.7e-02 <5.2e-02 <5.4e-02 <6.7e-02 <6.8e-02 <6.5e-02 <5.5e-02 <5.9e-02, 8/5/2008 <4.7e-02 <5.2e-02 <3.6e-02 <5.0e-02 <5.0e-02 <5.0e-02 <4.7e-02 <4.5e-02 8/12/2008 <4.5e-02 <4.2e-02 <4.2e-02 <5.4e-02 <4.7e-02 <4.7e-02 <4.5e-02 <4.2e-02 8/19/2008 <4.1 e-02 <4.2e-02 <5.5e-02 <4.1e-02 <5.7e-02 <3.5e-02 <4.6e-02 <4.6e-02 8/26/2008 <4.8e-02 <2.9e-02 <3.4e-02 <4.1e-02 <3.6e-02 <3.0e-02 <3.3e-02 <4.0e-02 9/2/2008 <2.9e-02 <3.0e-02 <2.8e-02 <2.5e-02 <1.9e-02 <2.8e-02 -<3.3e-02 <2.9e-02 9/9/2008 <2.6e-02 <3.8e-02 <4.0e-02 <2.9e-02 <3.7e-02 <2.8e-02 <3.6e-02 <3-7e-02 9/16/2008 <3.5e-02 <2.7e-02 <3.0e-02 <2.7e-02 <3.5e-02 <2.6e-02 <3.5e-02 <2.9e-02 9/23/2008 <4.9e-02 <4.4e-02 <4.5e-02 <3.8e-02 <4.9e-02 <4.5e-02 <3.7e-02 <2.5e-02 9/30/2008 <6.2e-02 <4.4e-02 <5.4e-02 <5.4e-02 <4.0e-02 <6.6e-02 <4.9e-02 <5.1 e-02 10/7/2008 <3.6e-02 <3.1 e-02 <3.3e-02 <2.7e-02 <3.1 e-02 <3.5e-02 <3.1e-02 <3.0e-02 10/14/2008 <4.8e-02 <4.6e-02 <3.0e-02 <3.8e-02 <3.5e-02 <4.0e-02 <4.0e-02 <4.0e-02 10/21/2008 <3.2e-02 <3.0e-02 <2.8e-02 <3.4e-02 <3.5e-02 <3.1 e-02 <4.7e-02 <3.4e-02 10/28/2008 <5.4e-02 <6.3e-02 <5.2e-02 <5.9e-02 <4.4e-02 <5.5e-02 <4.1 e-02 <5.5e-02 11/4/2008 <3.3e-02 <3.8e-02 <3.8e-02 <3.8e-02 <5.0e-02 <4.1e-02 <4.3e-02 <4.4e-02 11/11/2008 <3.1 e-02 <2.6e-02 <3.2e-02 <3.4e-02 <2.9e-02 <3.1 e-02 <3.6e-02 <3.4e-02 11/18/2008 <3.5e-02 <2.3e-02 <3.6e-02 <3.2e-02 <3.9e-02 <3.1e-02 <3.2e-02 <2.5e-02 11/25/2008 <4.1 e-02 <5.1e-02 <4.8e-02 <5.2e-02 <4.5e-02 <4.1 e-02 <4.7e-02 <5.3e-02 12/2/2008 <5.1 e-02 <5.0e-02 <5.4e-02 <4.6e-02 <5.9e-02 <5.4e-02 <6.5e-02 <6.1 e-02 12/9/2008 <5.0e-02 <4.2e-02 <5.9e-02 <3.8e-02 <4.6e-02 <4.9e-02 <3.9e-02 <5.1 e-02 12/16/2008 <3.2e-02 <3.1e-02 <3.2e-02 <3.2e-02 <2.5e-02 <3.1e-02 <4.0e-02 <2.7e-02 12/23/2008 <3.7e-02 <3.8e-02 <3.7e-02 <5.7e-02 <4.0e-02 <4.6e-02 <3.9e-02 <4.6e-02 12/30/2008 <4.9e-02 <4.1 e-02 <4.8e-02 <4.5e-02 <5.8e-02 <4.7e-02 <6.6e-02 <5.2e-02 Required LLD 7.OOE-02 19

Table 6 -- 2008 Environmental Air Particulate Composite Gamma Isotopic Results (Units of pCi/m3).

Location NW-1.0 sWIWsW-0.95 SSW-1.2 SW-12.3 SSE-4.5 E-3.5 N-1.45 N-9.4 Nuclides Control Control Ba-140 <7.5e-02 <6.1 e-02 <4.7e-02 <1.4e-02 <5.5e-02 <3.7e-02 <5.4e-02 <5.4e-02 Be-7 1.37e-01 1.51e-01 1.43e-01 1.66e-01 1.74e-01 1.65e-01 I .ea-01 1.59e-01 Co-57 <9.7e-04 <1.2e-03 <1.1e-03 <1.le-03 <1.2e-03 <1.le-03 <1.1e-03 <1.le-03 Co-58 <3.0e-03 <3.1e-03 <3.6e-03 <3.6e-03 <3.1e-03 <3.8e-03 <3.6e-03 <4.2e-03 Composite Dates Co-60 <2.7e-03 <3.1e-03 <2.3e-03 <2.1e-03 <1.4e-03 <2.8e-03 <2.7e-03 <1.8e-03 1ST QTR Cs-1 34 <2.4e-03 <2.0e-03 <1.8e-03 <2.4e-03 <1.9e-03 <2.0e-03 <1.9e-03 <2.1 e-03 Required LLD 5.0e-2 01/01/08-03125/08 Cs-1 37 <2.0e-03 <2.9e-03 <2.0e-03 <2.1 e-03 <2.2e-03 <1.8e-03 <2.6e-03 <2.1e-03 Required LLD 6.0e-2 Fe-59 <1.2e-02 <5.9e-03 <1.2e-02 <1.4e-02 <1.2e-02 <8.7e-03 <9.5e-03 <1.3e-02 K-40 <3.0e-02 <2.5e-02 <3.le-02 <2.8e-02 <3.2e-02 <2:4e-02 <3.1e-02 <2.7e-02 La-140 <8.7e-02 <7.0e-02 <5.4e-02 <1.6e-02 <6.3e-02 <4.3e-02 <6.2e-02 <6.2e-02 Mn-54 <2.3e-03 <2.3e-03 <2.3e-03 <2.2e-03 <1.9e-03 <1.9e-03 <1.8e-03 <2.1 e-03 Nb-95 <7. le-03 <6.1e-03 <6.0e-03 <6.1e-03 <6.8e-03 <6.8e-03 <8.5e-03 <7.0e-03 Zn-65 <4.2e-03 <5.2e-03 <3.9e-03 <4.4e-03 <5.6e-03 <4.5e-03 <3.9e-03 <4.8e-03 Zr-95 <6.3e-03 <6.6e-03 <6.9e-03 <5.2e-03 <5.6e-03 <6.3e-03 <6.5e-03 <5.6e-03 Ba-140 <1.2e-01 <4.6e-02 <1.3e-01 <1.4e-01 <1.8e-01 <1.8e-01 <3.0e-02 <1.7e-01 Be-7 1.41e-01 1.6e-01 1.5e-01 2.44e-01 1.79e-01 1.66a-0i 1.59e-01 1.7e-01 Co-57 <6.9e-04 <6.3e-04 <7.3e-04 <9.1e-04 <7.6e-04 <8.2e-04 <7.9e-04 <9.0e-04 Co-58 <4.0e-03 <3.5e-03 <3.6e-03 <4.2e-03 <4.9e-03 <3.5e-03 <3.5e-03 <4.0e-03 Co-60 <2.5e-03 <2.5e-03 <2.0e-03 <8.2e-04 <2.5e-03 <2.9e-03 <2.2e-03 <7.9e-04 2ND QTR Cs-134 <1.4e-03 <1.9e-03 <1.4e-03 <1.9e-03 <1.9e-03 <2.1e-03 <1.7e-03 <1.8e-03 Required LLD 5.0e-2 03/26108-06-24-08 Cs-137 <1.3e-03 <1.7e-03 <1.7e-03 <1.2e-03 <1.7e-03 <1.le-03 <1.3e-03 <1.2e-03 Required LLD 6.0e-2 Fe-59 <1.4e-02 <1.2e-02 <1.4e-02 <2.2e-02 <9.6e-03 <1.4e-02 <1.2e-02 <1.6e-02 K-40 <2.4e-02 <2.4e-02 <2.4e-02 <3.5e-02 <2.7e-02 <2.1 e-02 <2.0e-02 <3.7e-02 La-140 <1.2e-01 <4.6e-02 <1.3e-01 <1.4e-01 <1.8e-01 <1.8e-01 <3.0e-02 <1.7e-01 Mn-54 <1.5e-03 <2.4e-03 <1.5e-03 <3.4e-03 <4.9e-04 <2.4e-03 <2.2e-03 <3. le-03 Nb-95 <7.2e-03 <9.5e-03 <7.7e-03 <1.1e-02 <8.4e-03 <9.5e-03 <8.0e-03 <8.4e-03 Zn-65 <5.5e-03 <5.6e-03 <4t8e-03 <1.7e-03 <4.8e-03 <5.6e-03 <4. le-03 <1.6e-03 Zr-95 <6.3e-03 <7.7e-03 <5.7e-03 <1.le-02 <6.3e-03 <6.4e-03 <5.5e-03 <8.6e-03 20

Table 6 - 2008 Environmental Air Particulate Composite Gamma Isotopic Results (continued)

(Units of pCilm3)

Location NW-1.0 SW/WSW-0.95 SSW-1.2 SW-12.3 SSE-4.5 E-3.5 N-1.45 N-9.4 Nuclides Control Control Ba-140 <3.3e- -02 <4.2e-02 <2.7e-02 <3.7e-02 <1.2e-02 <6.5e-02 <3.1 e-02 <5.3e-02 Be-7 I1.37e-01 1.56e-01 1.62e-01 1.53e-01 1.78e-01 1.46e-01 1.5e-01 1.52e-01 Co-57 <6.7e-04 <8.2e-04 <7.1 e-04 <8.8e-04 <6.4e-04 <6.7e-04 <7.4e-04 <9.0e-04 Co-58 <3.5e-03 <2.4e-03 <2.4e-03 <4.5e-03 <3.2e-03 <3.8e-03 <3.2e-03 <4.9e-03 Composite Dates Co-60 <2.5e-03 <3.2e-03 <1.7e-03 <3.7e-03 <3.2e-03 <2.0e-03 <1.7e-03 <2.3e-03 3RD QTR Cs-1 34 <1 .4e-03 <2.0e-03 <1.9e-03 <5.6e-04 <1.6e-03 <2.3e-03 <1.7e-03 <2.1e-03 Required LLD 5.0e-2 06/24/08-09/30/08 Cs-1 37 <2.2e-03 <2.5e-03 <1.8e-03 <2.1e-03 <1.0e-03 <1.9e-03 <1.6e-03 <2.0e-03 Required LLD 6.0e-2 Fe-59 <8.4e-03 <9.8e-03 <1.le-02 <7.7e-03 <1.2e-02 <9.9e-03 <9.1e-03 <9.7e-03 K-40 <2.4e-02 <2.4e-02 <2.0e-02 <2.9e-02 <2.7e-02 <2.5e-02 <2.0e-02 <3.4e-02 La-140 <3.3e-02 <4.2e-02 <2.7e-02 <3.7e-02 <1.2e-02 <6.5e-02 <3.1e-02 <5.3e-02 Mn-54 <2.5e-03 <2.0e-03 <1.8e-03 <3.5e-03 <4.7e-04 <2.3e-03 <2.0e-03 <2.4e-03 Nb-95 <4.6e-03 <6.2e-03 <4.7e-03 <4.1e-03 <5.9e-03 <6.9e-03 <4.7e-03 <8.0e-03 Zn-65 <5.2e-03 <4.5e-03 <5.7e-03 <7.3e-03 <7,2e-03 <5.2e-03 <4.5e-03 <5.2e-03 Zr-95 <3.8e-03 <5.9e-03 <3.1e-03 <8.1e-03 <5.6e-03 <4.9e-03 <4.0e-03 <5.6e-03 Ba-140 <5.3e-02 <3.5e-02 <4.9e-02 <2.5e-02 <3.0e-02 <4.2e-02 <2.7e-02 <2.1 e-02 Be-7 1.78e-01 1.86e-01 1.38e-01 1.83e-01 1.63e-01 I.V2e-01 1.96e-01 1.69e-01 Co-57 <7.9e-04 <7.9e-04 <6.7e-04 <7.9e-04 <8.7e-04 <7.6e-04 <9.1e-04 <7.4e-04 Co-58 <2 .4e-03 <2.4e-03 <2.9e-03 <3,1e-03 <5.0e-03 <3.I e-03 <7.1e-04 <2.5e-03 Co-60 <7.8e-04 <2.3e-03 <6.8e-04 <2.1 e-03 <2.9e-03 <1.8e-03 <6.7e-04 <1.2e-03 4TH QTR Cs-134 <1 .3e-03 <1.2e-03 <1.9e-03 <9.0e-04 <2.le-03 <1.8e-03 <1.8e-03 <1.3e-03 Required LLD 5.0e-2 09/30/08-12130/08 Cs-1 37 <2 .0e-03 <2.0e-03 <1.9e-03 <1.8e-03 <1.5e-03 <1.4e-03 <2.0e-03 <1.2e-03 Required LLD 6.0e-2 Fe-59 <9.2e-03 <6.5e-03 <9-3e-03 <7.9e-03 <1.3e-02 <9.8e-03 <7.9e-03 <7.1 e-03 K-40 <2.2e-02 <3.3e-02 <3.0e-02 <1.8e-02 <2.2e-02 <2.4e-02 <3.2e-02 <1.8e-02 La-140 <5.3e-02 <3.5e-02 <4.9e-02 <2.5e-02 <3.0e-02 <4.2e-02 <2.7e-02 <2. le-02 Mn-54 <2.9e-03 <2.2e-03 <1.2e-03 <2.0e-03 <2.0e-03 <1.6e-03 <1.2e-03 <1.7e-03 Nb-95 <6.3e-03 <3.5e-03 <5.1e-03 <4.0e-03 <5.6e-03 <4.6e-03 <5.4e-03 <2.9e-03 Zn-65 <6.6e-03 <6.0e-03 <5.8e-03 <4.0e.03 <6.6e-03 <S.le-03 <6.2e-03 <2.4e-03 Zr-95 <9.9e-03 <5.0e-03 <5.2e-03 <4.2e-03 <6.3e-03 <5. 1e-03 <4.6e-03 <4.1e-03 21

D. Surface Water Program Surfacewater monitoring stations are found at four locations as detailed in Table 1 - Comanche Peak Nuclear Power Plant Radiological Environmental Monitoring Program. Location N- 1.5 provides samples representative of Squaw Creek reservoir surface water at a location beyond significant influence of the plant discharge. Location ESE-1 .4 provides samples representative of discharges from Squaw Creek reservoir downstream to Squaw Creek and to Lake Granbury via an installed return line. [NOTE: The installedreturn line to Lake Granburyhas never been used to send water back to Lake Granbury.] Location NE-7.4 provides samples of Lake Granbury surface water downstream of the discharge from the return line from Squaw Creek reservoir. A control sample is obtained from the Brazos River, upstream of Lake Granbury at location N-19.3. Surface water samples from Squaw Creek reservoir locations were collected weekly and composited for monthly gamma isotopic analysis.

Samples from Lake Granbury locations were collected monthly and analyzed by gamma spectrometry. All surface water samples were also composited quarterly by location for tritium analysis.

For the year 2008 all surface water samples were collected as required.'

Table 7 -- 2008 Environmental Surface Water Tritium and Gamma Isotopic Results contains the reported values. Forty-eight samples were analyzed by gamnma spectrometry. All results for the required radionuclides were reported as less than the required LLDs. Sixteen quarterly composited samples were analyzed for tritium. The results of the reported tritium values for Squaw Creek reservoir were in line with expected concentrations. The tritium values ranged from a high of 1.43e+04 pCi/I to a low of 1.18e+04 pCi/l. The results from Lake Granbury were all less than the required LLDs as expected. The tritium concentration reported in Squaw Creek is well below the action level of 3.0e+4 pCi/l and is following the expected concentration variations based on fuel cycles, power histories and reservoir makeup due to rain and pump transfers from Lake Granbury. Graph 2 - 2008 Environmental Surface Water Tritium Results indicates the current results and the short-term trend of the tritium concentration in Squaw Creek reservoir. The tritium value varies only slightly and is leveling off which possibly indicates that equilibrium may have been reached or soon will be reached. Graph 3 -

Squaw Creek Maximum Tritium Values trends the reservoir tritium concentration since it was first detected in 1990 after Unit 1 startup and is located on page 30. This long-term graph also indicates that equilibrium concentrations may have been obtained. Squaw Creek reservoir tritium is a direct product of the operation of CPNPP and is the only consistent indicator detectable in the environment surrounding Comanche Peak. There should not be any significant changes in the tritium concentrations in the near future and no action levels are anticipated. A review of pre-operational and operational data indicated the 2008 results were both expected and consistent with previous data and that no anomalies had occurred.

22

For the year 2008, there were no exceptions to the Surface Water Program.

23

Table 7 -- 2008 Environmental Surface Water Tritium and Gamma Isotopic Results (Units of pCi/I)

H-3 Nuclides Date Location Ba-140 Be-7 Co-58 Co-60 Cs-134 Cs-137 Fe-59 1-131 K-40 La-140 Mn-54 Nb-95 Zn-65 Zr-95 01129108 ESE-1.4 <8.6e+00 <2.2e+01 <3.0e+00 <2.6e+00 <2.4e+00 <2.5e+00 <7.5e+00 <1.4e+01 <4.le+O0 <8.6e+00 <2.4e+00 <3.0e+00 <5.1e+00 <4.6e+00 02/26/08 ESE-1.4 <7.8e+00 <2.8e+O0 <3.1e+00 <2.7e+00 <2.5e+00 <2.8e+00 <6.7e+00 <1.2e+01 <4.4e+O0 <7.8e+00 <2.7e+00 <3.1e+00 <5.7e+00 <5.6e+00 03/25/08 ESE-1.4 1.35e+04 <1.4e+O1 <3.5e+01 <4.4e+00 <5.0e+00 <3.3e+00 <4.0e+00 <1.0e+01 <1 .4e+01 <6.8e+O0 <1.4e+01 <3.8e+00 <5.4e+00 <9.2e+00 <6.8e+00 04/29/08 ESE-1 4 <8.5e+00 <1.9e+O0 <2.3e+00 <2.2e+00 <2.0e+00 <1.9e+00 <5.2e+00 <1.4e+O0 3.1e+01 <8.5e+00 <2.0e+00 <3.le+00 <4.5e+00 <4.2e+00 05127108 ESE-1.4 <9.5e+00 <2.7e+01 <3.5e+00 <3.4e+00 <3.2e+00 <2.8e+00 <7.5e+00 <1.2e+O0 <4.5e+O0 <9.5e+00 <3.4e+00 <3.5e+00 <6.9e+00 <5.3e+00 06124108 ESE-1 4 1.33e+04 <1.2e+O1 <2.8e+01 <3.8e+00 <3.8e+00 <3.2e+00 <3.2e+00 <9.3e+00 <1.4e+01 3.8e+01 <1.2e+Oi <3.1e+00 <4.9e+00 <1.2e+01 <6.3e+00 07/29/08 ESE-1.4 <8.2e+00 <1.6e+O0 <1.9e+00 <1.8e+00 <1.5e+00 <1.5e+00 <4.8e+00 <9.8e+00 2.9e+01 <8.2e+00 <1.6e+00 <2.6e+00 <3.9e+00 <3.5e+00 08126108 ESE-1.4 <1.4e+O1 <3.3e+01 <4.8e+00 <5.7e+00 <3.9e+00 <3.7e+00 <1.2e+O! <1.4e+01 <5.4e+01 <1.4e+O0 <3.5e+00 <5.0e+00 <9.4e+00 <8.0e+00 09/30/08 ESE-1.4 1.18e+04 <4.8e+00 <9.4e+00 <9.6e-01 <9.1e-01 <9.2e-01 <9.0e-01 <2.4e+00 <9.2e+00 <1.9e+01 <4.8e+00 <9.0e-01 <2.6e+00 <2.1e+00 <1.7e+00 10/28/08 ESE-1.4 <9.8e+00 <2.7e+01 <3.8e+00 <3.8e+00 <2.5e+00 <3.0e+00 <8.6e+00 <1.le+01 <5.4e+01 <9.8e+00 <3.4e+00 <3.6e+00 <6.7e+00 <5.4e+00 11/25/08 ESE-1.4 <1.2e+O1 <2.7e+O0 <3.le+00 <3.1e+00 <3.2e+00 <3.4e+00 <6.0e+00 <1.4e+01 <4.6e+O0 <1.2e+O0 <2.8e+00 <4.1e+00 <6.9e+00 <5.7e+00 12/30/08 ESE-1.4 1.21e+04 <9.le+00 <2.4e+01 <2.7e+00 <2.5e+00 <2.2e+00 <2.4e+00 <5.9e+00 <1Ae+01 <3.4e+O0 <9.1 e+00 <2.5e+00 <4.6e+00 <9.4e+00 <4.4e+00 01/29/08 N-1.5 <1.2e+O1 <3.1e+O0 <3.7e+00 <4.1e+00 <3.6e+00 <3.3e+00 <8.le+00 <1,4e+Oi <6.0e+O0 <1.2e+01 <2.9e+00 <4.6e+00 <7.5e+00 <7.6e+00 02126/08 N-1.5 <8.2e+00 <3.0e+O0 <2.8e+00 <2.8e+00 <2.7e+00 <2.6e+00 <7.2e+00 <1.2e+O0 <4.4e+O0 <8.2e+00 <2.5e+00 <3.6e+00 <5.9e+00 <5.2e+00 03/25/08 N-1.5 1.27e+04 <9.7e+00 <3.1e+O0 <3.4e+00 <2.9e+00 <3.1e+00 <3.0e+00 <7.7e+00 <1.4e+O1 2.5e+01 <9.7e+00 <3.0e+00 <3.8e+00 <7.5e+00 <6.4e+00 04/29/08 N-1.5 <9.4e+00 <2.4e+01 <2.7e+00 <2.8e+00 <2.6e+00 <2.5e+00 <6.7e+00 <1.4e+01 <5.le+O1 <9.4e+00 <2.4e+00 <5.5e+00 <5.5e+00 <4.9e+00 05/27/08 N-1.5 <1.0e+O1 <3.7e+O1 <4.0e+00 <3.9e+00 <3.3e+00 <4.3e+00 <6.9e+00 <1.3e+01 <5.2e+01 <1.0e+O0 <3.6e+00 <5.3e+00 <1.0e+01 <7.8e+00 06/24/08 N-1,5 1.43e+04 <7.2e+00 <1.6e+O1 <1.8e+00 <1.7e+00 <1.6e÷00 <1.8e+00 <4.3e+00 <1.2e+01 1.68e+01 <7.2e+00 <1.6e+00 <2.3e+00 <4.1e+00 <3.3e+00 07/29108 N-1.5 <7.4e+00 <1.6e+O0 <1.9e+00 <2.0e+00 <1.7e+00 <1.9e+00 <4.7e+00 <1.2e+01 <3.1e+01 <7.4e+00 <1.6e+00 <2.3e+00 <3.9e+00 <3.2e+00 08/26/08 N-1.5 <1.0e+O1 <2.4e+O0 <3.5e+00 <3.5e+00 <2.7e+00 <2.9e+00 <8.2e+00 <1.5e+01 <4.7e+01 <1.0e+01 <3.7e+00 <4.7e+00 <7.0e+00 <7.0e+00 09/30/08 N-1.5 1.36e+04 <9.0e+O0 <2.0e+O0 <2.0e+00 <2.3e+00 <2.2e+00 <1.8e+00 <5.4e+00 <1.3e+O0 <3.1e+01 <9.0e+00 <1.9e+00 <2.8e+00 <4.9e+00 <3.8e+00 10/28/08 N-1.5 <6.4e+00 <2.3e+O1 <2.7e+00 <2.5e+00 <2.le+00 <2.4e+00 <5.3e+00 <1.2e+O0 <3.0e+O1 <6.4e+00 <2.0e+00 <3.6e+00 <5.7e+00 <4.9e+00 11/25108 N-1.5 <5.5e+00 <1.5e+01 <1.7e+00 <1.9e+00 <1.7e+00 <1.6e+00 <3.9e+00 <7.le+00 3.33e+01 <5.5e+00 <1.6e+00 <2.0e+00 <3.6e+00 <2.8e+00 12/30108 N-1.5 1,23e+04 <1.1e+01 <2.4e+O1 <2.9e+00 <3.4e+00 <3.2e+00 <2.3e+00 <6.7e+00 <1.3e+01 <4.1e+01 <1.1e+01 <2.4e+00 <3.5e+00 <5.7e+00 <5.8e+00 01129/08 NE-7,4 <9.3e+00 <5.4e+O0 <5.6e+00 <4.8e+00 <5.7e+00 <5.5e+00 <1.2e+01 <1.1e+01 <6.1e+01 <9.3e+00 <5.6e+00 <6.le+00 <1.4e+O0 <9.0e+00 02/26/08 NE-7.4 <1.5e+01 <5.0e+O1 <6.3e+00 <7.3e+00 <5.6e+00 <6.7e+00 <1.1e+01 <1.0e+01 <1.1e+02 <1.5e+01 <5.7e+00 <6.6e+00 <1.6e+O0 <1.1e+01 03/25/06 NE-7.4 <1.4e+03 <1.4e+01 <5.6e+O0 <8.9e+00 <7.7e+00 <6.8e+00 <6.4e+00 <1.3e+01 <9.6e+00 <1.le+02 <1.4e+01 <7.3e+00 <8.6e+00 <1.9e+01 <1.3e+01 04/29/08 NE-7.4 <1.4e+01 <5.5e+O1 <6.7e+00 <9.0e+00 <6.5e+00 <7.8e+00 <1.5e+01 <1.3e+01 <1.2e+02 <1.4e+01 <7.6e+00 <7.0e+00 <1.4e+O0 <1.3e+01 05/27/08 NE-7.4 <1.,e+O0 <4.5e+O0 <5.6e+00 <6.le+00 <5.6e+00 <5.6e+00 <1.2e+01 <9.3e+00 <8.6e+01 <1.le+01 <5.6e+00 <7.4e+00 <2.5e+O0 <1.0e+O0 06/24/08 NE-7.4 <1.4e+03 <1.2e+01 <5.2e+O0 <6.7e+00 <6.9e+00 <6.9e+00 <5.2e+00 <1.2e+01 <1 .3e+01 <9.7e+01 <1.2e+01 <6.8e+00 <8.3e+00 <2.7e+01 <1.le+01 07/29/08 NE-7.4 <1.5e+O0 <4.6e+O0 <5.3e+00 <5.7e+00 <4.8e+00 <5.5e+00 <1.4e+01 <1.3e+O0 <8.0e+01 <1.5e+01 <4.7e+00 <7.8e+00 <1.3e+O1 <1.0e+01 08/26/08 NE -7.4 <1.5e+01 <5.8e+01 <7.8e+00 <9.9e+00 <8.0e+00 <8.1e+00 <1.7e+O0 <1.4e+01 <1.0e+02 <1.5e+01 <7.6e+00 <7.9e+00 <1.8e+O0 <1.2e+01 09/30/08 NE-7.4 <1.3e+03 <1.2e+01 <3.8e+O0 <4.4e+00 <5.2e+00 <3.6e+00 <4.6e+00 <9.0e+00 <7.6e+00 5.0e+01 <1.2e+01 <4.5e+00 <5.3e+00 <1.0e+01 <8.8e+00 10/28/08 NE-7.4 <9.7e+00 <5.5e+0i <6.4e+00 <5.9e+00 <7.0e+00 <6.4e+00 <1.5e+Oi <1 .3e+01 <7.7e+01 <9.7e+00 <5.6e+00 <7.8e+00 <1.6e+01 <8.5e+00 11/25/08 NE-7.4 <9.6e+00 <3.2e+0i <4.0e+00 <4.8e+00 <3.9e+00 <4.9e+00 <9.6e+00 <7.8e+00 <5.8e+01 <9.6e+00 <4.8e+00 <5.5e+00 <1.1e+O0 <6.4e+00 12/30108 NE-7.4 <1.4e+03 <1.2e+01 <4.8e+0i <6.6e+00 <5.2e+00 <5.8e+00 <4.4e+00 <1.8e+0i <1.2e+01 <9.0e+01 <1.2e+01 <5.4e+00 <6.4e+00 <1.5e+01 <1.1e+01 01/29/08 N-19+3 <1.4e+01 <5.9e+01 <5.9e+00 <8.ie+00 <7.9e+00 <7.4e+00 <1.6e+01 <1.3e+01 <1.2e+02 <1.4e+01 <7.2e+00 <8.3e+00 <1.9e+01 <1.4e+01 02126/08 N-19.3 <9.7e+00 <3.5e+O0 <4.9e+00 <4.7e+00 <4.9e+00 <4.9e+00 <1.1e+O0 <8.3e+00 <8.7e+01 <9.7e+00 <4.5e+00 <5.6e+00 <1.2e+01 <8.6e+00 03/25/08 N-19.3 <1.3e+03 <1.le+01 <5.6e+01 <6.9e+00 <7.0e+00 <6.9e+00 <6.0e+00 <1.4e+01 <1.4e+01 <1.0e+02 <1.1e+01 <6.6e+00 <8.7e+00 <1.6e+01 <1.3e+O0 04129/08 N-19.3 <1.4e+01 <6.3e+O0 <7.3e+00 <7.9e+00 <6.7e+00 <8.3e+00 <1.5e+O0 <1.2e+01 <9.6e+O0 <1.4e+01 <7.2e+00 <9.5e+00 <1.9e+01 <1.2e+01 05/27/08 N-19.3 <7.3e+00 <3.1e+01 <4.1e+00 <4.1e+00 <4.le+00 <3.9e+00 <8.1e+00 <8.0e+00 2.0e+00 <7.3e+00 <3.9e+00 <6.5e+00 <1,7e+01 <6.6e+00 06/24/08 N-19.3 <1.4e+03 <1.2e+01 <5.2e+O0 <6.7e+00 <6.9e+00 <6.9e+00 <5.2e+00 <1.2e+Oi <1.3e+01 <9.7e+01 <1.2e+01 <6.8e+00 <8.3e+00 <2.7e+01 <i.le+01 07/29/08 N-19.3 <1.2e+01 <4.3e+O0 <5.6e+00 <6.5e+00 <5.2e+00 <4.6e+00 <9.0e+00 <1.4e+01 <8.7e+O0 <1.2e+0i <5.0e+00 <5.7e+00 <1.le+O0 <9.4e+00 08126/08 N-19.3 <1.3e+01 <4.5e+O1 <7.9e+00 <9.1e+00 <6.0e+00 <6.0e+00 <1.5e+01 <9.3e+00 5.8e+01 <1.3e+O1 <7.8e+00 <7.5e+00 <1.3e+O0 <1.,e+01 09130/08 N-19.3 <1.3e+03 <1.4e+01 <4.5e+01 <6.2e+00 <7.4e+00 <6.2e+00 <6.0e+00 <1.4e+01 <1.le+O0 6.1e+01 <1.4e+01 <5.5e+00 <6.2e+00 <1.5+01 <9.1e+00 10/25/08 N-19.3 <9.0e+00 <5.6e+O0 <6.2e+00 <5.5e+00 <6.8e+00 <5.5e+00 <1.2e+Oi <1.3e+O0 <7.3e+01 <9.0e+00 <4.8e+00 <5.7e+00 <1.6e+01 <9.3e+00 11/25/08 N-19,3 <1.le+01 <4.8e+O0 <5.2e+00 <5.8e+00 <5.0e+00 <5.3e+00 <1.5e+O0 <8.6e+00 <8.3e+01 <1.1e+O0 <4.7e+00 <6.9e+00 <!.5e+01 <1.1e+01 12/30/08 N-19 3 <1.4e+03 <9.4e+00 <5.1e+01 <5.0e+00 <9.2e+00 <5.9e+00 <6.6e+00 <1.4e+Oi <1.3e+01 <8.7e+O0 <9.4e+00 <5.6e+00 <6.7e+00 <1.9e+01 240.0e+01 Required LLD's 3.00e+03 1.50e+01 1.50e+01 1.50e+01 1.50e+01 1.80e+01 3.00e+01 1.50e+01 1.50e+01 1.50e+01 1,50e+01 3.00e+01 1.50e+01 Reportable Level 3.00e+04 2.00e+02 1.00e+03 3.00e+02 3.00e+01 5,00e+01 4.00e+02 2.00e+01 2.00e+02 1.00e+03 4.00e+02 3.00e+02 4.00e+02

Graph 2 -- 2008 Environmental Surface Water Tritium Results 16000 14000 12000 10000 0 8000 6000 NE-7.4 C

4000 ESE-1.4 2000 0

Mar-08 Jun-08 Sep-08 Dec-08 Monthly/Composite Sample Dates 25

E. Surface Drinking Water Program Surface drinking water was collected at two monitoring locations. Table 1

-- Comanche Peak Nuclear Power Plant Radiological Environmental Monitoring Program for 2008 details the location and types of analysis required. Samples of water from Squaw Creek reservoir were collected at the monitoring location NNW-0. I and analyzed at detection levels required for drinking water standards even though the water is not allowed to be used as potable water. Monitoring location N-9.9 was used as a surface drinking water location based on the proximity of the City of Granbury intake to the Granbury potable water system. All surface drinking water samples were collected weekly and then composited for Iodine- 131 analysis, gamma isotopic analysis, and gross beta analysis on a monthly basis. Tritium analysis was performed on a quarterly basis.

For the year 2008, all samples were analyzed for gamma emitting radionuclides. The results are reported in Table 8 - Environmental Surface Drinking Water Tritium, Gross Beta and Gamma Isotopic Results.

There were no gamma emitting radionuclides identified in any of the twenty-four composite samples. Tritium reported in Squaw Creek reservoir ranged from 1.30E+04 pCi/l to 1.34E+04 pCi/I and averaged 1.32E+04 pCi/I. Tritium reported from all Lake Granbury water samples indicated less than the required LLD as expected. Graph 4 - 2008 Environmental Surface Drinking Water Tritium Results trends the results reported for the year 2008. Gross Beta results at the indicator location NNW-0.1 ranged from 9.8E+00 pCi/I to 1.07E+01 pCi/l with an average of 2.67E+01 pCi/I. Gross Beta results at the control location N-9.9 ranged from 4.4E+00 pCi/I to 2.4E+01 pCi/I with an average of 1.17E+01 pCi/l.

Graph 5 - 2008 Environmental Surface Drinking Water Gross Beta Results trends the gross beta results for the two monitor locations and indicates no influence from Comanche Peak in the levels detected in the two different bodies of water. Past gross beta results for Lake Granbury have been as high as 83 pCi/I. The gross beta results received are within values previously reported and there is no reportable level for gross beta so no action is required at this time.

For the year 2008 there was one exception to the Surface Drinking Water Program.

For sample analysis on samples collected on 10/28/08, the MDC's for Gross Beta analysis were not met. This was due to a large amount of solids being present in the sample. Smart form 2008-003820 was written.

26

Table 8 -- 2008 Environmental Surface Drinking Water Tritium, Gross Beta and Gamma Isotopic Results (Units of pCi/t)

Gross Nuclides Date Location H-3 Beta 1-131 Ba-140 Co-58 Co-60 Cs-134 Cs-137 Fe-59 La-140 Mn-54 Nb-95 Zn45 Zr-95 01/29/08 NNW-0.1 2.52e+01 <9.0e-01 <1.Oe+01 <3.5e+00 <3.1e+00 <3.6e+00 <2.9e+00 <7.9e+00 <1.0e+01 <3.2e+00 <4.5e+00 <9.2e+00 <6.4e+00 02/26/08 NNW-0.1 1.49e+01 <7.5e-01 <1.3e+01 <4.7e+00 <3.7e+00 <3.4e+00 <3.6e+00 <1.Oe+01 <1.3e+01 <3.5e+00 <6.1e+00 <8.6e+00 <8.6e+00 03/25/08 NNW-0.1 1.32e+04 2.95e+01 <8.6e-01 <1.5e+01 <4.5e+00 <4.4e+00 <3.6e+00 <3.6e+00 <9.8e+00 <1.5e+01 <4.0e+00 <5.7e+00 <1.0e+01 <8.2e+00 04/29/08 NNW-0.1 2.03e+01 <9.7e-01 <1.3e+01 <2.5e+00 <2.3e+00 <2.le+00 <2.0e+00 <6.2e+00 <1.3e+01 <2.1e+00 <3.8e+00 <7.0e+00 <4.9e+00 05127/08 NNW-0.1 2.88e+01 <7.7e-01 <3.9e+00 <1.4e+00 <1.4e+00 <1.3e+00 <1.4e+00 <3.4e+00 <3.9e+00 <1.1e+00 <1.5e+00 <2.7e+00 <3.7e+00 06/24/08 NNW-0.1 1.34e+04 3.3e+01 <8.1e-01 <1.4e+01 <4.2e+00 <3.6e+00 <3.9e+00 <3.7e+00 <9.9e+00 <1.4e+01 <3.4e+00 <4.1e+00 <1.2e+01 <6.2e+00 07/29/08 NNW-0,1 2.9e+01 <8.5e-01 <7.8e+00 <2.1e+00 <2.2e+00 <1.9e+00 <1.5e+00 <4.9e+00 <7,8e+00 <1.8e+00 <2.6e+00 <3.4e+00 <3.7e+00 08126108 NNW-0.1 4.07e+01 <7.2e-01 <1.5e+01 <5.4e+00 <4.2e+00 <3.2e+00 <3.6e+00 <9.1e+00 <1.5e+01 <3.7e+00 <4.9e+00 <8.7e+00 <7.4e+00 09/30/08 NNW-0,1 1.30e+04 3.47e+01 <6.9e-01 <1.0e+01 <2.8e+00 <2.5e+00 <2.3e+00 <2.3e+00 <5.8e+00 <1.0e+01 <2.3e+00 <4.2e+00 <6.4e+00 <4.6e+00 10/28/08 NNW-0.1 9.8e+00 <8.6e-01 <1.3e+01 <3.9e+00 <3.2e+00 <3.9e+00 <3.9e+00 <8.le+00 <1.3e+01 <3.2e+00 <6.2e+00 <1,3e+01 <6.9e+00 11/25/08 NNW-0.1 2.73e+01 <9.8e-01 <1.2e+01 <4.7e+00 <6.0e+00 <4.8e+00 <4.6e+00 <9.5e+00 <1.2e+0! <4.1e+00 <6.4e+00 <1.1e+01 <1.1e401 12/30/08 NNW-0.1 1.30e+04 2.67e+01 <9.5e-01 <1.4e+01 <3.6e+00 <3.5e+00 <2.9e+00 <3.1e+00 <8.4e+00 <1.4e+01 <3.1 e+00 <4.2e+00 <8.7e+00 <5.7e+00 01/29/08 N-9.9 9.1e+00 <8.7e-01 <1.2e-02 <3.2e-03 <3.1e-03 <2.8e-03 <2.9e-03 <7.0e-03 <1.2e-02 <2.4e-03 <3.6e-03 <8.0e-03 <6.le-03 02/26/08 N-9.9 2.4e+01 <7.6e-01 <1.4e+01 <4.2e+00 <4.0e+00 <3.5e+00 <3.3e+00 <8.7e+00 <1.4e+01 <4.4e+00 <4.5e+00 <8.le+00 <8.9e+00 03/25/08 N-9.9 <1.3e+03 1.16e+01 <8.4e-01 <1.2e+01 <5.4e+00 <5.2e+00 <4.2e+00 <3.8e+00 <1.3e+01 <1.2e+01 <5.6e+00 <6.0e+00 <1.2e+01 <6.4e+00 04/29/08 N-9.9 9.9e+00 <9.7e-01 <1.3e+01 <4.5e+00 <3.9e+00 <3.2e+00 <3.5e+00 <8.9e+00 <1.3e+01 <3.9e+00 <5.2e+00 <8.3e+00 <7.0e+00 05/27/08 N-9.9 9.4e+00 <7.2e-01 <9.5e+00 <3.7e+00 <3.3e+00 <3.3e+00 <3.4e+00 <8.5e+00 <9.5e+00 <3.7e+00 <6.6e+00 <1.5e+01 <5.7e+00 06/24/08 N-9.9 <1.49+03 1.1e+01 <8.2e-01 <1.3e+01 <4.0e+00 <2.9e+00 <3.4e+00 <3.7e+00 <8.9e+00 <1.3e+01 <2.9e+00 <3.8e+00 <9.2e+00 <6.8e+00 07129/08 N-9.9 1.16e+01 <8.0e-01 <8.3e+00 <1.9e+00 <2.0e+00 <1.7e+00 <1.7e+00 <5.1e+00 <8.3e+00 <1.8e+00 <2.5e+00 <3.9e+00 <3.5e+00 08126108 N-9.9 8.8e+00 <7.1e-01 <1.5e+01 <3.9e+00 <4.1e+00 <3.7e+00 <3.6e+00 <9.7e+00 <1.5e+01 <3.5e+00 <5.0e+00 <8.1e+00 <7.5e+00 09/30/08 N-99 <1.3e+03 4.4e+00 <8.1e-01 <8.6e+00 <2.3e+00 <2.6e+00 <1.8e+00 <1.9e+00 <5.4e+00 <8.6e+00 <2.4e+00 <3.2e+00 <4.7e+00 <4Ae+00 10/28/08 N-9.9 1.47e+01 <8.6e-01 <1.4e+01 <5.8e+00 <4.6e+00 <4.5e+00 <4.2e-00 <9.2e+00 <1.4e+01 <3.5e+00 <6.6e+00 <1.7e+01 <8.9e+00 11/25/08 N-9.9 1.45e+01 <9.7e-01 <1.2e+01 <3.7e+00 <3.9e+00 <3.0e+00 <3.0e+00 <7.6e+00 <1.2e+01 <3.2e+00 <5.4,4e+00 <9.0e+00 <7.5e+00 12/30/08 N-9.9 <1.4e+03 1.19e+01 <9.9e-01 <1.2e+01 <2.9e+00 <3.5e+00 <2.7e+00 <2.9e+00 <7.1e+00 <1.2e+01 <2.5e+00 <3.6e+00 <7.6e+00 <5.1e+00 Required LLD's 2.OOE+03 4.00E+00 1.00E+00 1.50E+01 1.50E+01 1.50E+01 1.50E+01 1.80E+01 3.00E+01 1.50E+01 1.50E+01 1.50E+01 3.OOE+01 1.50E+01 Reportable Level 2.OOE+04 None 2.00E+00 2.00E+02 1.00E+03 3.00E+02 3.OOE+01 5.O0E+01 4.'4E+02 2.OOE+02 1.00E+03 4.OOE+02 3.00E402 4.OOE402 27

Graph 3 -- Squaw Creek Maximum Tritium Values 30000 25000 20000 0

0

,- 15000 s Maximum tritium iiC 10000 5000 0L cz;b Kb Ct-0 Ci~

Yearly Maximum 28

Graph 4 -- 2008 Environmental Surface Drinking Water Tritium Results 1.60E+04 1.40E+04 1.20E+04 M 1.OOE+04

-.- N-9.9 0 8.00E+03

--- NNW-0.1 D, 6.OOE+03 4.00E+03 2.OOE+03 0.00E+00 Mar-08 Jun-08 Sep-08 Dec-08 Composite Sample De 29

Graph 5 -- 2008 Environmental Surface Drinking Water Gross Beta Results 4.50E+01 4.OOE+01 3.50E+01 3.OOE+01 U) N-9.9 0

2.50E+01 2.OOE+01 -,- NNW-0.1 C 1.50E+01 1.OOE+01 5.OOE+00 O.OOE+00 Monthly Data Points 30

F. Ground Water Program Table I - Comanche Peak Nuclear Power Plant Radiological Environmental Monitoring Program for 2008 specifies the five groundwater monitoring locations. Groundwater supplies in the site area are not affected by plant effluents and are sampled only to provide confirmation that groundwater is not affected by plant discharges.

Groundwater samples were collected quarterly and analyzed for gamma isotopes and tritium at each location.

For the year 2008 a total of twenty groundwater samples were collected from the five different monitoring locations. There were no radionuclides identified in any of the samples. All required LLDs were met for each required gamma emitting radionuclide. Tritium analysis was performed on twenty samples, all indicated less than the required LLD. Results for all the groundwater analyses are reported in Table 9 - 2008 Environmental Groundwater Tritium and Gamma Isotopic Results. These results confirm that plant discharges are having no effect on groundwater in the area surrounding Comanche Peak.

For the year 2008, there were no exceptions to the Ground Water Program.

31

Table 9 - 2008 Environmental Groundwater Tritium and Gamma Isotopic Results (Units of pCI/I)

Nuclides H-3 Ba-140 Co-58 Co-60 Cs-134 Cs-137 Fe-59 1-131 La-140 Mn-54 Nb-95 Zn-65 Zr-95 Date Location 03/25108 SSE46 <1.4e+03 <1.3e+O1 <6.5e+00 <8.3e+00 <5.7e+00 <7.0e+00 <1.6e+O1 <1.3e+01 <1.3e+O1 <7.5e+00 <9.1e+00 <1.4e+O1 <1.3e+O1 06124108 SSE-4.6 <1.2e+03 <1.2e+01 <5.1e+00 <4.9e+00 <5.2e+00 <4.8e+00 <1.le+O1 <1.4e+O1 <1.2e+O1 <4.7e+00 <6.0e+00 <1.9e+O1 <8.5e+00 09130108 SSE-4.6 <1.3e+03 <7.le+00 <4.7e+00 <4.2e+00 <3.8e+00 <4.0e+00 <8.8e+00 <7.7e+00 <7.1e+00 <3.9e+00 <5.4e+00 <8.9e+00 <6.7e+Oo 12130/08 SSE-4.6 <1.3e+03 <1,4e+O1 <7.6e+00 <7.5e+00 <6.6e+00 <7.7e+00 <1.9e+O1 <1,4e+O1 <1.4e+O1 <6.3e+00 <9.3e+00 <2.2e+O1 <1.3e+O1 03/25/08 N-1.45 <1.4e+03 <1.2e+O1 <6,3e+00 <8.8e+00 <6.8e+00 <7.3e+00 <1.4e+O1 <1.5e+O1 <1.2e+O1 <8.0e+00 <9.9e+00 <1.5e+O1 <1.4e+O1 06124/08 N-1.45 <1.2e+03 <1.le+O1 <4.8e+00 <3.6e+00 <4.2e+00 <4.2e+00 <7.8e+00 <1.5e+O1 <1.1e+01 <4.0e+00 <4.9e+O0 <1.6e+O1 <7.3e+00 09130108 N-1.45 <1.3e+03 <1.3e+O1 <7.7e+00 <7.0e+00 <6.9e+00 <7.0e+00 <1.5e+O1 <1,4e+O1 <1.3e+O1 <6.4e+00 <1.le+O1 <2.5e+O1 <1.0e+O1 12130/08 N-145 <1.3e+03 <1.4e+O1 <7.0e+00 <7.7e+00 <6,1e+00 <6.3e+00 <1.4e+O1 <9.9e+00 <1.4e+O1 <6.4e+00 <7.7e+00 <1.4e+O1 <1.3e+O1 03/25108 N-9.8 <1.4e+03 <1.2e+O1 <4.0e+00 <4.le+00 <4.4e+00 <3.9e+00 <8.9e+00 <1.4e+O1 <1.2e+O1 <4.2e+00 <6.6e+00 <1.0e+O1 <7.5e+00 06/24/08 N-9.8 <1.2e+03 <1.3e+O1 <4.5e+00 <4.9e+00 <3.7e+00 <4.0e+00 <1.le+O1 <1.2e+O1 <1.3e+O1 <4.5e+00 <5.6e+00 <9.2e+00 <8.3e+00 09/30/08 N-9ý8 <1.3e+03 <1.4e+O1 <7.3e+00 <7.4e+00 <5.6e+00 <6.5e+00 <1.5e+O1 <1.2e+O1 <1.4e+O1 <7,le+00 <7.8e+00 <1.4e+O1 <1.le+O1 12/30/08 N-9.8 <1.4e+03 <1,le+O1 <5.0e+00 <5.3e+00 <5.1e+00 <4.5e+00 <1.2e+O1 <1.0e+O1 <1.1e+01 <4.4e+00 <6.2e+00 <1.7e+O1 <8.7e+00 03/25/08 W-1.2 <1.4e+03 <1.2e+O1 <7.0e+00 <7.6e+00 <7.4e+00 <6.5e+00 <1.6e+O1 <1.4e+O1 <1.2e+O1 <8.4e+00 <8.0e+00 <1.9e+O1 <1.2e+O1 06/24/08 W-1.2 <1.2e+03 <8.4e+00 <2.6e+00 <2.5e+00 <2.5e+00 <2.4e+00 <5.7e+00 <1.4e+O1 <8.4e+00 <2.2e+00 <3.le+00 <5.6e+00 <4.2e+00 09/30/08 W-1.2 <1.3e+03 <1.4e+O1 <5.7e+00 <9.0e+00 <6.0e+00 <6.5e+00 <1.6e+O1 <1.le+O1 <1.4e+O1 <5.5e+00 <7.7e+00 <1.8e+O1 <1.le+O1 12/30/08 W-1,2 <1.3e+03 <1.3e+O1 <6.2e+00 <7.5e+00 <4.9e+00 <5.6e+00 <1.3e+O1 <1.0e+O1 <1.3e+O1 <5.6e+00 <6.8e+00 <1.5e+O1 <1.le+01 03125/08 WSW-0.1 <1.2e+03 <1.2e+O1 <7.3e+00 <7.0e+00 <6.8e+00 <6.0e+00 <1.7e+O1 <1.le+O1 <1.2e+O1 <4.6e+00 <8,6e+00 <1.7e+O1 <1.2e+O1 06/24/08 WSW-0.1 <1.3e+03 <1.2e+O1 <4.5e+00 <4.5e+00 <5.1e+00 <4.3e+00 <1.1e+O1 <1.4e+O1 <1.2e+O1 <4.7e+00 <6.5e+00 <1.5e+O1 <8.0e+00 09/30108 WSW-0.1 <1.3e+03 <1.3e+O1 <6.2e+00 <7.5e+00 <5.7e+00 <5.4e+00 <1.le+O1 <9.5e+00 <1.3e+O1 <5.4e+00 <6.8e+00 <1.5e+O1 <1.le+O1 12/30/08 WSW-0.1 <1.3e+03 <1.4e+O! <5.4e+00 <7.4e+00 <6.4e+00 <6.3e+00 <1.6e+O1 <1.2e+O1 <1.4e+O1 <6.0e+00 <7.2e+00 <1.3e+O1 <1.0e+O1 Required LLD's 3.OOE+03 1.50E+01 1.50E+01 1.50E+01 1.50E+01 1.80E+01 3.OOE+01 1.50E+01 1.50E+01 1.50E+01 150E+01 3.OOE+01 1.50E+01 Reportable Levels 2.OOE+04 2.00E+02 1.00E+03 3.OOE+02 3.OOE+01 5.OOE+01 4.OOE+02 2.OOE+01 2.OOE+02 1.00E+03 4.OOE+02 3.OOE+02 4.OOE+02 32

G. Sediment Program Shoreline sediments were collected at four different monitoring locations.

One sample location is along the shore of Squaw Creek Reservoir, one sample location is on Squaw Creek down stream of the dam discharge and two locations are along Lake Granbury's shores. Each sample is collected on a six-month frequency and sent to the contract laboratory for analysis by gamma spectrometry.

The process of shoreline sedimentation is a complex evolution whereby potential radionuclides and stable elements may concentrate in the bottom sediment of particular bodies of water. The concentrations are effected by such things as colloidal particles combining with chelating agents and biological action of bacteria and other benthic organisms. Monitoring of the area shorelines provides one of the first and best indicators of radionuclide deposition.

For the year 2008 results from the gamma isotopic analysis of shoreline sediments is reported in Table 10 - 2008 Environmental Sediment Gamma Isotopic Resultsl As expected and in agreement with previous results from both the pre-operational and operational programs, naturally occurring Potassium-40 was detected in all eight samples. Radioactive nuclides required to be analyzed for were performed and all but one sample indicated less than the required LLDs. During previous years, both.pre-operational and operational, positive indications occasionally had been noted for Cesium-137 and during 2008 there was one positive Cesium-137 results reported. The results were above the required LLD. The only other positive value reported for 2008 was for naturally occurring Beryllium-7. As expected, there were no results in any sediment sample that indicated any direct influence from CPNPP discharges to the local environment.

For the year 2008, there were no exceptions to the Sediment Program.

33

Table 10 -- 2008 Environmental Sediment Gamma Isotopic Results (Units of pC!/kg)

Nuclides Ba-140 Be-7 Co-58 Co-60 Cs-134 Cs-137 Fe-59 1-131 K-40 La-140 Mn-54 Nb-95 Zn-65 Zr-95 Date Location 01/15/08 SE-5.3 <2.7e+02 <5.6e+02 <7.5e+O1 <9.6e+O1 <5.2e+O1 <5.7e+O1 <1.5e+02 <9.0e+O1 4.77e+03 <1.5e+02 <5.7e+O1 <9.4e+O1 <2.6e+02 <1.2e+02 01/15108 NNE-1.0 <9.8e+O1 <1.7e+02 <2.3e+O1 <3.0e+O1 <1.8e+O1 <2.2e+O1 <5.3e+O1 <3.0e+O1 1.5e+03 <5.6e+O1 <2.0e+O1 <3.4e+O1 <1.0e+02 <4.3e+O1 01115/08 NE-7T4 <1.2e+02 <2.2e+02 <2.3e+O1 <2.4e+O1 <2.4e+O1 <2.le+O1 <7.0e+O1 <3.7e+O1 1.87e+03 <6.le+O1 <2.2e+O1 <3.0e+O1 <8.8e+O1 <3.5e+O1 01115108 N-9.9 <2.0e+02 <3.1e+02 <4.3e+01 <4.3e+O1 <2.4e+O1 <3.4e+O1 <9.5e+O1 <6.2e+O1 4.98e+03 <8.4e+O1 <3.5e+O1 <6.2e+O1 <1.9e+02 <6.3e+O1 07101/08 SE-5.3 <2.5e+02 3.0e+02 <3.5e+O1 <3.3e+O1 <2.4e+O1 6.3e+01 <7.8e+O1 <1.4e+02 5.38e+03 <1.5e+02 <2.3e+O1 <4.4e+O1 <1.5e+02 <5.7e+O1 07101108 NNE-1.O <2.3e+02 <3.0e+02 <3.3e+O1 <3.9e+O1 <2.5e+O1 <3.2e+O1 <9.0e+O1 <1.5e+02 5.16e+03 <1.3,+02 <2.4e+O1 <4.4e+O1 <1.5e+02 <6.3e+O1 07101108 NE-7.4 <8.6e+O1 <3.2e+02 <3.4e+Q1 <3.9e+O1 <2.7e+O1 <3.3e+O1 <9,4e+O1 <1.5e+02 2.03e+03 <8.6e+O1 <3.2e+O1 <6.8e+O1 <1.4e+02 <5.4e+O1 07101/08 N-9.9 <3.7e+02 <4.3e+02 <5.le+O1 <3.3e+O1 <4.3e+O1 <4.6e+O1 <1.0e+02 <2.6e+02 3.79e+03 <1.7e+02 <4.7e+O1 <7.4e+O1 <2.3e+02 <9.le+O1 Required LLD's 1.50E+02 1.80E+02 Reportable Levels None None 34

Fish Program Fish samples were collected at two locations during the year 2008. One monitoring location is an area approximately two miles east-northeast of the site on Squaw Creek Reservoir. The second location is on Lake Granbury approximately eight miles north-northeast of the site. Fish sampling is scheduled for the months of April and October. CPNPP has contracted with an off site vendor for collection of fish from these areas. The collected fish are frozen and shipped to the independent laboratory where the edible portions are analyzed for gamma emitting radio-nuclides.

For the year 2008, the results of the analysis performed on the collected fish samples are reported in Table 11 -- 2008 Environmental Fish Gamma Isotopic Results. Catfish, Drum and Bass samples were analyzed as indicated in the table.

There were no positive results reported except for the expected Potassium-40, which is naturally occurring in all living organisms. All required radionuclide results were reported as less than the required LLDs. As a result of the fish-sampling program, there were no anomalies noted and no indication of any influence on the surrounding environment from Comanche Peak plant discharges.

For the year 2008, there were no exceptions to the Fish Program.

No abnormal results were reported by CPNPP or by the State of Texas. As expected, Potassium-40 was the only positive isotope found.

35

Table 11 -- 2008 Environmental Fish Gamma Isotopic Results (Units of pCilkg wet)

Nuclides Ba-140 Co-58 Co-60 Cs-134 Cs-137 Fe-59 1-131 K-40 La-140 Mn-54 Nb-95 Zn-65 Zr-95 Fish Type Date Location 04129/2008 Squaw Creek <1.2e+02 <5.6e+O1 <9.2e+O1 <7.2e+O1 <6.6e+O1 <1.5e+02 <1.1e+02 2.33e+03 <1.2e+02 <5.4e+O1 <6.5e+O0 <1.6e+02 <1.5e+02 Catfish 04/2912008 Squaw Creek <1.3e+02 <1.4e+O1 <2.0e+O1 <4.9e+O1 <5.7e+O1 <1.9e+02 <7.7e+O1 3.44e+03 <1.3e+02 <4.9e+O1 <5.3e+O1 <1.8e+02 <1.3e+02 Bass 1011412008 Squaw Creek <5.4e+O1 <6.3e+O1 <1.0e+02 <6.3e+O1 <1.2e+02 <1.3e+02 <1.6e+02 3.54e+03 <5.4e+O1 <7.8e+O1 <6.5e+O1 <1.9e+02 <1.2e+02 Catfish 10114/2008 Squaw Creek <9.2e+O1 <4.6e+O1 <4.9e+O1 <3.5e+O1 <4.2e+O1 <9.0e+O1 <8.le+O1 3.21e+03 <9.2e+O1 <4.9e+O1 <4.le+O1 <1.2e+02 <7.4e+O1 Bass 04129/2008 Lake Granbury <8.8e+O1 <3.8e+O1 <3.9e+O1 <4.3e+O1 <3.8e+O1 <1.3e+02 <8.5e+O1 2.75e+03 <8.8e+O1 <5.5e+O1 <6.4e+O1 <9.6e+O1 <9.le+O1 Drum 04/29/2008 Lake Granbury <9.8e+O1 <5.0e+O1 <7.4e+O1 <4.5e+O1 <4.5e+O1 <9.9e+O1 <7.3e+O1 2.84e+03 <9.8e+O1 <5.6e+O1 <6.2e+O1 <9.0e+O1 <8.le+O1 Bass 10/14/2008 Lake Granbury <1.4e+02 <8.0e+O1 <6.le+O1 <7.0e+O1 <5.0e+01 <1.4e+02 <1.1e+02 1.89e+03 <1.4e+02 <7.3e+O1 <7.3e+O1 <1.8e+02 <1.4e+02 Catfish 1011412008 Lake Granbury <1.3e+02 <8.le+O1 <7.4e+O1 <5.7e+O1 <1.3e+O1 <9.3e+O1 <7.4e+O1 3.17e+03 <1.3e+02 <5.0e+O1 <5.6e+O0 <1.5e+02 <7.0e+O1 Bass Required LLD's 1.30E+02 1.30E+02 1.30E+02 1.50E+02 2.60E+02 1.30E+02 2.60E+02 Reportable Levels 3.00E+04 1.00E+04 1.OOE+03 2.OOE+03 1.00E+04 3.OOE+04 2.OOE+04 36

1. Food Products Program Food products (pecan) were collected at the time of harvest. The samples are obtained at monitoring location ENE-9.0 and are shipped to the contract laboratory for gamma isotopic analysis.

For the year 2008, resultsof the gamma isotopic analyses are reported in Table 12 -- 2008 Environmental Food Products Gamma Isotopic Results.

Naturally occurring Potassium 40 was detected in the sample as expected, and there were no other gamma emitting radionuclides identified.

For the year 2008, there were no exceptions to the Food Products program.

37

Table 12 -- 2008 Environmental Food Products Gamma Isotopic Results (Units of pCilkg wet)

Food Type - Pecans Nuclides Ba-140 Be-7 Co-58 Co-60 Cs-134 Cs-137 Fe-59 1-131 K-40 La-140 Mn-54 Nb-95 Zn-65 Zr-95 Date Location 1111/08 ENE-9.0 <7.0e+O1 <2.5e+02 <3.le+O1 <3.4e+O1 <3.4e+O1 <2.8e+O1 <6.7e+O1 <6.0e+O1 4.87e+03 <7.0e+O1 <3.le+O1 <3.2e+O1 <7.8e+O1 <5.3e+01 Required LLD's 6.OOE+01 8.OOE+01 6.OOE+01 Reportable Levels 1.OOE+03 2.OOE+03 1.OOE+02 38

J. Broadleaf Program Broadleaf sample collection is conducted in accordance with the requirements of the Radiological Environmental Monitoring Program.

The program specifies the sampling based on the absence of milk monitoring locations. One broadleaf control location is located at SW-13.5 in the vicinity of the previous control milk location. The two indicator locations, N-I1.45 and SW- 1.0, are located near the site boundaries. The broadleaf samples consist of mainly native grasses and cedar leaves and are analyzed for Iodine- 131 and gamma emitting isotopes.

For the year 2008, all radionuclide analysis met their required LLDs and there was no indication of gamma emitting radionuclides. There were no indications of Iodine-131 being detected. The naturally occurring radionuclide of Potassium-40 was found in 36 of 36 samples taken. The radionuclide Beryllium-7 was present in 35 of 36 samples.

For the year 2008, there Were no exceptions to the Broadleaf Program.

39

Table 13 -- 2008 Environmental Broadleaf Iodine-131 and Gamma Isotopic Results (Units of pCi/kg wet)

Nuclides 1-131 Ba-140 Be-7 Co-58 Co-60 Cs-134 Cs-1 37 Fe-59 K-40 La-140 Mn-54 Nb-95 Zn-65 Zr-95 Date Location 01/2912008 N-1.45 <5.2E+01 <7.8E+01 1.11E+03 <2.3E+01 <2.2E+01 <2.2E+01 <2.OE+01 <4.8E+01 2.71E+03 <7.8E+01 <2.OE+01 <3.3E+01 <5.5E+01 <4.4E+01 0212612008 N-1.45 <3.6e+01 <6.2e+01 1.68e+03 <3.5e+01 <4.3e+01 <3.8e+01 <4.0e+01 <7.le+01 2.8e+03 <6.2e+01 <4.0e+01 <4.2e+01 <1.le+02 <6.0e+01 03/25/2008 N-1.45 <2.0e+01 <1.4e+02 2.77e+03 <6.0e+01 <4.0e+01 <4.le+01 <3.8e+01 <8.2e+0l 3.18e+03 <1.4e+02 <4.2e+01 <6.4e+Ol <1.3e+02 <9.9e+01 0412912008 N-1.45 <5.5e+0l <6.8e+01 1.99e+03 <4.6e+01 <5.6e+01 <5.1e+01 <4.3e+01 <1.0e+02 4.09e+03 <6.8e+01 <4.3e+01 <5.0e+01 <1.8e+02 <8.le+01 05/27/2008 N-1.45 <3.4e+01 <1.2e+02 4.1e+02 <5.5e+01 <5.6e+01 <5.0e+01 <6.6e+01 <1.4e+02 3.38e+03 <1.2e+02 <6.9e+0l <7.6e+0l <1.6e+02 <1.0e+02 06/24/2008 N-1.45 <4.4e+01 <3.le+02 1.42e+03 <6.7e+O1 <6.3e+0l <4.2e+01 <4.9e+01 <1.5e+02 5.7e+03 <3.le+02 <4.7e+01 <1.0e+02 <2.le+02 <1.1e+02 07129/2008 N-1.45 <5.2e+O1 <1.9e+02 1.11e+03 <5.5e+01 <5.7e+O1 <4.2e+O1 <4.8e+01 <1.3e+02 3.89e+03 <1.9e+02 <5.0e+0l <7.7e+01 <1.2e+02 <9.8e+01 08/26/2008 N-1.45 <4.4e+0l <2.0e+02 1.1e+03 <8.1e+01 <7.4e+O1 <6.0e+01 <6.6e+01 <1.5e+02 4.06e+03 <2.0e+02 <6.3e+0l <8.6e+0! <1.6e+02 <1.2e+02 09130/2008 N-1.45 <5.4e+Ol <7.0e+01 2.7e+02 <3.9e+01 <3.8e+!O <4.3e+O1 <3.3e+01 <8.8e+01 5.42e+03 <7.0e+01 <3.7e+Ol <4.4e+0i <9.5e+01 <6.8e+01 10/28/2008 N-1.45 <4.4e+01 <7.7e+01 1.63e+03 <3.3e+01 <4.9e+01 <3.0e+01 <3.9e+0i <6.6e+01 2.82e+03 <7.7e+01 <3.5e+0l <4.6e+01 <8.6e+01 <5.9e+01 11/25/2008 N-1.45 <5.5e+01 <5.6e+01 3.189+03 <2.7e+0l <2.8e+0l <2.8e+01 <2.8e+01 <5.5e+0l 1.65e+03 <5.6e+01 <2.4e+01 <2.8e+0l <7.2e+01 <4.7e+01 1213012008 N-1.45 <5.0e+0l <9.5e+0l 4.3e+02 <4.4e+0l <5.4e+0l <3.6e+01 <3.6e+01 <8.1e+01 2.03e+03 <9.5e+01 <4.2e+01 <4.3e+01 <9.6e+01 <6.0e+01 Control 01/29/2008 SW-13.5 <5.OE+01 <1.5E+02 2.03E+03 <5.3E+01 <6.1E+01 <3.9E+01 <4.2E+01 <1.2E+02 2.79E+03 <1.5E+02 <5.4E+01 <5.5E+01 <1.2E+02 <8.7E+01 02/26/2008 SW-13.5 <2.7e+0l <1.0e+02 4.2e+02 <4.9e+Ol <5.2e+0l <4.9e+0l <4.le+Ol <1.2e+02 7.62e+03 <1.0e+02 <5.6e+01 <6.2e+01 <1.2e+02 <8.7e+01 03/2512008 SW-13.5 <1.8e+01 <1.2e+02 1.25O+03 <3.9e+O1 <4.4e+01 <4.0e+01 <3.2e+O1 <9.9e+01 7.4e+03 <1.2e+02 <3.7e+01 <5.2e+01 <1.0e+02 <6.5e+01 04129/2008 SW-13.5 <5.5e+O1 <1.1e+02 1.08e+03 <5.0e+O0 <7.3e+01 <4.8e+01 <5.3e+01 <1.2e+02 4.95e+03 <1.le+02 <5.2e+01 <6.3e+01 <1.5e+02 <8.1e+01 05/27/2008 SW-1 3.5 <3.7e+01 <6.5e+01 4.0e+02 <4.4e+01 <3.7e+01 <3.7e+01 <3.7e+01 <8.6e+01 5.59e+03 <6.5e+01 <3.6e+01 <4.6e+01 <1.1e+02 <7.5e+01 06/24/2008 SW-13.5 <3.7e+01 <1.6e+02 7.9e+02 <4.7e+01 <4.6e+O1 <4.6e+01 <4.6e+01 <1.Oe+02 4.03e+03 <1.6e+02 <4.3e+01 <5.0e+01 <1.le+02 <8.9e+01 07/29/2008 SW- 3.5 <5.4e+01 <2.2e+02 8.5O+02 <6.6e+01 <5.6e+01 <5.5e+01 <4.9e+01 <1.0e+02 3.42e+03 <2.2e+02 <5.0e+01 <8.3e+01 <1.4e+02 <1.2e+02 08/26/2008 SW-13.5 <5.le+01 <2.0e+02 <6.0e+02 <6.8e+01 <8.Ie+01 <5.5e+01 <7.le+01 <1.3e+02 2.82e+03 <2.0e+02 <8.0e+01 <9.3e+01 <2.3e+02 <1.2e+02 09/3012008 SW- 3.5 <5.3e+01 <8.0e+01 3.4e+02 <3.3e+01 <3.8e+01 <3.le+01 <2.7e+01 <7.0e+01 2.71e+03 <8.0e+01 <2.6e+01 <3.4e+01 <7.6e+01 <4.6e+01 10/28/2008 SW-13.5 <4.5e+01 <1.1e+02 8.1e+02 <4.3e+01 <6.5e+01 <4.6e+01 <5.5e+01 <1.3e+02 1.66e+03 <1.le+02 <4.9e+01 <6.le+01 <1.5e+02 <8.2e+01 11/25/2008 SW-13.5 <5.6e+01 <1.0e+02 1.71e+03 <4.5e+01 <5.3e+01 <4.4e+01 <4.9e+0i <1.Oe+02 3.29e+03 <1.Oe+02 <4.0e+O1 <5.3e+O1 <1.le+02 <7.6e+01 12130/2008 SW-13.5 <5.5e+01 <1.2e+02 1.96e+03 <5.1e+01 <5.5e+01 <5.4e+01 <4.8e+0i <1.1e+02 1.98e+03 <1.2e+02 <5.le+O1 <7.8e+01 <1.3e+02 <1.0e+02 01/29/2008 SW-1.0 <4.1E+0I <6.7E+01 9.19E+02 <1.8E+01 <1.9E+01 <1.8E+01 <1.7E+01 <4.6E+01 2.33E+03 <6.7E+01 <1.8E+01 <2.4E+01 <4.6E+01 <3.5E+01 02/26/2008 SW-1.0 <5.6e+01 <1.2e+02 7.2e+02 <5.9e+01 <5.0e+0l <4.4e+01 <5.7e+0l <1.le+02 2.01e+03 <1.2e+02 <5.3e+01 <4.0e+01 <1.5e+02 <1.le+02 03/25/2008 SW-1.O <5.9e+01 <1.9e+02 1.08e+04 <4.6e+01 <4.4e+01 <4.4e+01 <5.3e+01 <1.0e+02 1.36e+03 <1.9e+02 <4.8e+01 <5.8e+01 <1.0e+02 <8.6e+01 04/2912008 SW-1.0 <5.1e+01 <1.le+02 1.09e+03 <4.9e+01 <3.6e+01 <4.5e+01 <5.le+01 <1.0e+02 5.9e+03 <1.1e+02 <5.0e+01 <6.0e+01 <1.4e+02 <1.0e+02 05/27/2008 SW- .0 <3.0e+0l <9.7e+01 2.4e+02 <5.8e+01 <7.le+01 <5.9e+O0 <4.6e+0l <1.3e+02 4.05e+(,3 <9.7e+0i <6.7e+0l <7.6e+01 <1.5e+02 <1.1e+02 06/24/2008 SW-t.0 <4.2e+0l <1.9e+02 1.48e+03 <3.6e+0l <4.5e+0l <3.6e+01 <3.6e+0l <9.5e+0l 3.31e+03 <1.9e+02 <3.3e+01 <5.1e+01 <9.5e+01 <6.4e+0l 07129/2008 SW-1.0 <5.7e+0l <2.3e+02 6.2e+02 <6.2e+01 <5.5e+01 <5.4e+0l <5.0e+0l <1.6e+02 3.36e+03 <2.3e+02 <5.0e+01 <5.9e+01 <1.5e+02 <1.le+02 08126/2008 SW-1.0 <4.5e+0l <1.6e+02 8.4e+02 <8.le+0l <9.0e+01 <5.5e+0l <7.3e+01 <1.6e+02 2.45O+03 <1.6e+02 <7.4e+0l <1.le+02 <1.9e+02 <1.4e+02 09130/2008 SW-1.0 <5.2e+0l <1.5e+02 5.8e+02 <4.5e+01 <3.8e+01 <4.6e+01 <4.9e+0l <1.3e+02 2.43e+03 <1.5e+02 <5.0e+01 <6.5e+0l <1.2e+02 <<9.le+01 10/28/2008 SW-1.0 <4.2e+0l <1.2e+02 5.7e+02 <4.6e+0l <4.7e+01 <4.8e+0l <4.0e+01 <1.0e+02 3.16e+03 <1.2e+02 <4.3e+01 <5.6e+01 <1.4e+02 <7.5e+0l 11/25/2008 SW-1.0 <4.8e+0l <6.2e+0l 2.35e+03 <3.7e+01 <3.7e+0l <3.2e+0l <3.3e+0l <7.1e+01 2.87e+03 <6.2e+01 <3.4e+01 <5.8e+0 <10.le+02 <5.9e+0!

12/30/2008 SW-1.0 <5.6e+0l <1.2e+02 2.19e+03 <5.0e+0l <5.4e+01 <5.0e+0l <4.5e+0l <1.0e+02 1.52e+03 <1.2e+02 <4.6e+01 <5.7e+01 <1.2e+02 <8.2e+0l Required LLD's 6.OOE+01 6.OOE+01 8.OOE+01 Reportable Levels 1.00E+02 1.00E+03 2.OOE+03 40

K. Conclusions For the year 2008, based on the results presented in this report and from comparisons with the pre-operational and operational program results from previous years, it can be concluded that the impact of Comanche Peak on the environment is very small. The only indication directly attributable to Comanche Peak is the tritium detected in Squaw Creek reservoir.

Gross beta trend indications concerning Squaw Creek Reservoir are consistent with previous values and do not indicate any increase due to influence from Comanche Peak. Future data will be evaluated as it is received and changes will be addressed as necessary.

The atmospheric environment was sampled for airborne particulate matter, radioiodine and direct radiation. The terrestrial environment was sampled using groundwater, surface drinking water, food products and broadleaf vegetation.

The aquatic environment was sampled using surface water, fish and shoreline sediments. The analyses of all these samples provided results that were below the measurement detection limits, or were indicative of expected natural terrestrial and cosmogenic levels, except for the tritium in the water samples of Squaw Creek reservoir. The tritium in Squaw Creek reservoir is reaching equilibrium and is expected to remain well below the reportable level.

There were no values reported during the year 2008 that exceeded any NRC reportable limit.

L. Inter Laboratory Comparison and Cross Check Program Areva NP Environmental Laboratory is the independent contract laboratory that processes the radiological environmental monitoring samples collected by CPNPP. The contract laboratory is required to participate in an Interlaboratory Comparison Program in accordance with the ODCM Control 3.12.3. Areva NP participates in multiple programs to ensure all environmental media sent to them are analyzed to the proper standards.

Areva NP recently published "Analytical Service Annual Quality Assurance Status Report January-December 2008" which included current interlaboratory comparison results and two year trends as appropriate. These reports explain the Quality Control Program used by Areva NP during their respective time periods.

Interlaboratory and third party quality control programs included the Environmental Crosscheck Program administered by Analytics, Inc., the Environmental Resource Associates (ERA) Proficiency Test (PT), the Department of Energy (DOE) Quality Assessment Program (QAP) and the Mixed Analyte Performance Evaluation Program (MAPEP). Areva NP also conducts an internal Quality Control Program that includes QC functions such as instrumentation 41

checks, blank samples, instrumentation backgrounds, duplicates, staff qualification analysis and process controls.

Extensive details of the results of the various interlaboratory and cross check programs are contained in the report mentioned above. A summary of the reporting period is reported below:

During the annual reporting period, there were 33 nuclides associated with 7 media types analyzed by means of the Laboratory's internal process control, DOE, ERA and Analytics quality control programs.

The Analytics Cross Check Program provided 391 individual environmental analyses for bias and 391 for precision. 92.6% fell within the Laboratory's acceptance criteria for bias and 98.2% were within tolerance limits for precision.

Of the 775 internal process control analyses evaluated for bias, 98.3% met Laboratory acceptance criteria. Also, 98.3% of the 465 results for precision were found acceptable.

Of the 165 QC charcoals evaluated for bias three did not meet the agreement criteria during this period and of the 12 evaluated for precision all samples met the acceptance criteria. All samples reported positive activity as expected.

Five of the 193 environmental analytical blanks analyzed reported positive activity greater than 3 times the standard deviation.

None of backgrounds processed reported activity above the 3 times the standard deviation limit.

The cumulative bias for the three programs evaluated to the internal Laboratory's performance criteria shows 96.5% of the 1166 individual results fell within acceptance criteria for bias while 98.2% of the 856 analyses fell within the acceptance criteria for precision.

A review was performed of all Condition Reports (CR) listed in the report. Thirty one CRs were closed during this period and thirty eight CRs were issued. No adverse trend can be detected and the Laboratory is pursuing resolution of all open CRs. As of December 31, 2008, a total of 14 CRs remain open.

There were two internal audits during the annual reporting period.

The independent laboratory, Areva, satisfies the requirements of the ODCM by their participation in the inter-laboratory and cross check programs documented in their annual report.

42

Appendix A Comanche Peak Nuclear Power Plant Land Use Census 2008 COPY 43

COMANCHE PEAK-NUCLEAR POWER PLANT LAND USE CENSUS 2008 The Land Use Census identified receptors within a five (5) mile radius of the plant in each of the sixteen (16) meteorological sectors. The Land Use Census was conducted July 17, 18, and 19, 2008 and includes the following items:

1. Evaluation of the 2008 Land Use Census

2. Nearest Resident by Sector, Distance, X/Q and D/Q

3. Nearest Garden by Sector, Distance and D/Q

4. Nearest Milk Animal by Sector, Distance and D/Q

5. Population by Sector and Distance

6. Environmental Sample Locations Table

7. Environmental Monitoring Locations Map- 2 Mile Radius

8. Environmental Monitoring Locations Map- 20 Mile Radius*

9. 5 Mile Sector and Road Map with Field Data*

These maps are vaulted along with this census. Copies of this census will not contain a copy of these maps unless specifically requested.

44

Evaluation of the 2008 Land Use Census The results of the 2008 Land Use Census were reviewed for impact on the Radiological Environmental Monitoring Program (REMP). The specific areas reviewed, that could be affected by changes found in the land use census, were the sampling requirements for milk, broadleaf vegetation and food products.

Reviewing the milk sampling requirements from the ODCM Table 3.12-1 requires that samples are to be obtained from milking animals in three locations within a 5 kin distance having the highest potential dose. If none are available, samples are acceptable from milking animals in locations 5 to 8 km distance where doses are calculated to be greater than 1 mrem per year. A sample is also required at a control location. There are currently no identified milking animals (cow or goat) within the specified distances therefore, there will be no milk sampled during the year 2008.

Since not all milk samples are available, the broadleaf vegetation sampling specified in ODCM Table 3.12-1 is being performed. Broadleaf sample requirements are such that samples of broadleaf vegetation are to be collected from each of two offsite locations of the highest predicted annual average D/Q if milk sampling is not performed at all the required locations.

Currently, broadleaf vegetation samples are collected at two indicator locations (N - 1.45 and SW - 1.0) and one control location (SW - 13.5). These indicator locations are near the site boundary in sectors where broadleaf vegetation is available and D/Q is high. Therefore, no change to the broadleaf sampling program is required.

Food product sample requirements of. ODCM Table 3.12-1 requires that one sample of each principal class of food product be collected from any area that is irrigated with water in which liquid plant waste has been discharged. Of the gardens identified in the land use census, no gardens are located in any area that irrigates with water in which liquid plant wastes are discharged. Currently, food products are sampled from one indicator location (ENE - 9.0) when in season. The indicator location for ENE-9.0 for pecans at time of harvest will be continued since it is a major source of food products sold to the public.

The 2008 Land Use Census did not identify any locations that are "available for sampling" and that would yield a calculated dose 20% greater than at the current sampling locations.

Calculated values for the associated X/Q and D/Q values for each controlling receptor location and pathway are included along with the receptor distances in the data tables of this land use census. The values used to determine potential dose due to radioactive effluent discharges are the highest calculated values based on annual average values. The annual average X/Q used for dose calculations is 3.30E-6, tritium X/Q is 4.36E-6, and the D/Q value is 3.34 E-8. All these values are conservative based on the 2008 Land Use Census data and therefore no changes are required in the dose calculation parameters as verified by the field data.

X/Q units are Sec/cubic meter

D/Q units are inverse square meters 45

Nearest Resident by Sector, Distance, X/Q and D/Q Sector Distance (Miles) X/Q D/Q N 2.2 9.28E-07 5.32E-09 NNE 2.2 5.58E-07 2.90E-09 NE 2.2 3.92E-07 1.42E-09 ENE 2.4 2.58E-07 7.08E-10 E 2.4 3.02E-07 6.62E-10 ESE 2.0 4.7E-07 1.20E-09 SE 1.9 8.28E-07 3.38E-09 SSE 1.5 1.1OE-06 6.60E-09 S 1.5 8.50E-07 5.20E-09 SSW 2.1 3.52E-07 1.56E-09 SW 1.1 1.40E-06 6.5E-09 WSW 1.0 1.80E-06 6.50E-09 W 1.6 7.64E-07 2.50E-09 WNW 2.8 4.07E-07 1.18E-09 NW 2.7 6.98E-07 2.24E-09 NNW 2.5 8.4E-07 3.6E-09 Note: The Annual Average X/Q used for dose calculations is 3.30E-06 sec/cubic meter.

The Tritium value X/Q used for dose calculations is 4.36E-06 sec/cubic meter.

The Annual Average D/Q used for dose calculations is 3.34E-08 inverse square meters.

46

Nearest Garden by Sector, Distance and D/Q Sector Distance (Miles)* D/Q N None None NNE None None NE None None ENE None None E None None ESE None None SE None None SSE None None S None None SSW None None SW None None WSW None None W None None WNW None None NW None None NNW None None

There are currently no gardens.

47

Nearest Milk Animal by Sector, Distance and D/Q Sector Distance (Miles)* D/Q N None None NNE None None NE None None ENE None None E None None ESE None None SE None None SSE None None S None None SSW None None SW None None WSW None None W None None WNW None None NW None None' NNW None None

No Milk samples are currently being collected.

48

Population by Sector and Distance Sector 0-1 1-2 2-3 3-4 4-5 . Total N - 3 35 117 155 NNE 13 122 29 164 NE 122 152 309 583 ENE 152 5 21 178 E - 109 21 35 165 ESE 3 64 120 189 376 SE - 24 120 160' 67 371 SSE - 80 98 82 2173 2433 S - 21 112 21 157 311 SSW - 13 5 48 66 SW - 96 3 72 37 208 WSW - 311 5 5 - 321 W - 56 13 21 24 114 WNW - 5 45 109 159 NW - 3 - 3 NNW - 3 53 40 96 TOTAL - 591 838 919 3355 5703 Based on an average of 2.66 residents per house, this average was obtained from North Central Texas Council of Governments for Hood and Somervell Counties and is derived from an average of residents per house of 2.57 and 2.74, respectively.

49

Environmental Sample Locations Table Sampling Point Location Sample Type*

Al N-1.45 (Squaw Creek Park) A A2 N-9.4 (Granbury) A A3 E-3.5 (Children's Home) A A4 SSE-4.5 (Glen Rose) A A5 S/SSW-1.2 A A6 SW-12.3 (CONTROL) A A7 SW/WSW-0.95 A A8 NW- 1.0 A RI N-1.45 (Squaw Creek Park) R R2 N-4.4 R R3 N-6.5 R R4 N-9.4 (Granbury) R R5 NNE- 1.1 R R6 NNE-5.65 R R7 NE-I.7 R R8 NE-4.8 R R9 ENE-2.5 R RIO ENE-5.0 R RI1 E-0.5 R R12 E-1.9 R R13 E-3.5 (Children's Home) R R14 E-4.2 R R15 ESE- 1.4 R R16 ESE-4.7 R R17 SE-1.3 R Ri8 SE-3.85 R 50

Environmental Sample Locations Table (cont.)

Sampling Point Location Sample Type*

R19 SE-4.6 R R20 SSE-1.3 R R21 SSE-4.4 (Glen Rose) R R22 SSE-4.5 (Glen Rose) R R23 S-1.5 R R24 S-4.2 R R25 SSW-I.1 R R26 SSW-4.4 (State Park) R R27 SW-0.9 R R28 SW-4.8 (Girl Scout Camp) R R29 SW-12.3 (CONTROL) R R30 WSW-1.0 R R31 WSW-5.35 R R32 WSW-7.0 (CONTROL) R R33 W-1.0 R R34 W-2.0 R R35 W-5.5 R R36 WNW-1.0 R R37 WNW-5.0 R R38 WNW-6.7 R R39 NW- 1.0 R R40 NW-5.7 R R41 NW-9.9 (Tolar) R R42 NNW-1.35 R R43 NNW-4.6 R 51

Environmental Sample Locations Table (cont.)

Sampling Point Location Sample Type*

SWI N- 1.5 (Squaw Creek Reservoir Marina) SW SW2 N-9.9 (Lake Granbury) SW/DW!

SW3 N-19.3 (CONTROL-Brazos River) SW SW4 NE-7.4 (Lake Granbury) SW SW5 ESE-1.4 (Squaw Creek Reservoir) SW 2 SW6 NNW-0.1 (Squaw Creek Reservoir) SW/DW 3 GWI W-1.2 (NOSF Potable Water) GW GW2 WSW-. 1 (Plant Potable Water) GW3,4 GW3 SSE-4.6 (Glen Rose) GW 4 GW4 N-9.8 (Granbury) GW1'4 GW5 N-1.45 (Squaw Creek Park) GW 4 SSl NNE- 1.0 (Squaw Creek Reservoir) SS SS2 N-9.9 (Lake Granbury) SS SS3 NE-7.4 (Lake Granbury) SS SS4 SE-5.3 (Squaw Creek) SS F1 ENE-2.0 (Squaw Creek Reservoir) F F2 NNE-8.0 (Lake Granbury) F FPI ENE-9.0 (Leonard Bros. Pecan Farm) FP 52

Environmental Sample Locations Table (cont.)

Sampling Point Location Sample Type*

BLI N-1.45 BL BL2 SW-1.0 BL 5 BL3 SW-13.5 (CONTROL) BL 5

Sample Type: A - Air Sample; R - Direct Radiation; SW - Surface Water; DW -Drinking Water GW - Ground Water; SS - Shoreline Sediments; M - Milk; F - Fish; FP - Food Products; BL - Broadleaf Vegetation NOTES: 1) The municipal water system for the City of Granbury is supplied by surface water from Lake Granbury (location SW2) and ground water (location GW4).

Each of these supplies is sampled. These samples are not required for compliance with Radiological Effluent Control 3/4.12.1, Table 3.12-1, because they are not affected by plant discharges.

2) This sample (location SW6) is represen'tative of discharges from Squaw Creek Reservoir both down Squaw Creek and to Lake Granbury via the return line to Lake Granbury if used.

3) Plant potable water could be supplied by surface water from Squaw Creek Reservoir (location SW6) but is normally supplied by ground water from onsite wells (location GW2). Each of these possible sources of water are sampled.

4) Ground water supplies in the plant site area are not affected by plant liquid effluents as discussed in CPSES FSAR Section 2.4.13 and are therefore not required to be monitored for radioactivity to meet the requirements of the Radiological Effluent Control 3/4.12.1, Table 3.12-1.

5) Broadleaf sampling will be performed at the specified locations if milk samples are unavailable from any location..

53

Environmental Suam-rne Locauions NlaL - 2 M.ile Radius 54

CP-200900568, Annual Radiological Environmental Operating Report, January 1 - December 31, 2008

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CP-200900568, Annual Radiological Environmental Operating Report, January 1 - December 31, 2008

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