NOC-AE-06002016, Annual Environmental and Annual Radiological Environmental Operating Report

Annual Environmental and Annual Radiological Environmental Operating Report

ML061250075
Person / Time
Site:	South Texas
Issue date:	04/27/2006
From:	Bullard W South Texas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
FOIA/PA-2010-0209, NOC-AE-06002016, STI-32006921
Download: ML061250075 (57)

Text

ALM Nuclear Operating Company South as Pe/dtEkrc GecncratingStaSton PO. Bo 289 Mdmvtbflh Tms 77483 _AA_

April 27, 2006 NOC-AE-06002016 10CFR50.36b STI: 32006921 U. 'S.Nuclear Regulatory Commission Attention: Document Control Desk One! White Flint North 115.55 Rockville Pike Rockville, MD 20852 South Texas Project Units 1 and 2 Docket Nos. STN 50-498, STN 50-499 2005 Annual Environmental and Annual Radiological Environmental Operating Reports Pursuant to the South Texas Project (STP) Unit 1 Operating License NPF-76, Unit 2 Operating License NPF-80 Appendix B, Environmental Protection Plan (Nonradiological), and Technical Specification 6.9.1.3, attached are the 2005 Annual Environmental and Annual Radiological Environmental Operating Reports.

There are no commitments included in this report.

If you have any questions, please contact J. D. Sherwood at (361) 972-8766 or me at (361) 972-7130.

W. T. Bullard Manager, Health Physics MK

Attachment:

2005 Annual Environmental and Annual Radiological Environmental Operating Reports.

NOC-AE- 06002016 Page 2 cc:

(paper copy) (electronic copy)

Regional Administrator, Region IV A. H. Gutterman, Esquire U. S. Nuclear Regulatory Commission Morgan, Lewis & Bockius LLP 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Mohan C. Thadani U. S. Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission Steve Winn Attention: Document Control Desk Christine Jacobs One White Flint North Eddy Daniels 11555 Rockville Pike NRG South Texas LP Rockville, MD 20852-2738 Senior Resident Inspector J. J. Nesrsta U. S. Nuclear Regulatory Commission R. K. Temple P. 0. Box 289, Mail Code: MN1 16 E. Alarcon Wadsworth, TX 77483 City Public Service C. M. C:anady Jon C. Wood City of Austin Cox Smith Matthews Electric Utility Department 721 Barton Springs Road C. Kirksey Austin, TX 78704 City of Austin Richard A. Ratliff Bureau of Radiation Control Texas Department of State Health Services 1100 West 49th Street Austin, TX 78756-3189

' r-be _

The 2005 Annual Environmental Operating Report for the South Texas Project Electric Generating Station combines in one report the requirements for the Annual Environmental Operating Report (Non-radiological) found in Appendix B to Facility Operating License Nos.

NPF-76 and NPF-80 and the requirements for the Annual Radiological Environmental Operating Report found in Part A of the station's Offsite Dose Calculation Manual.

Graphic and artwork perforbmed by Nancy Kubecka Photography performed by Judy Myers, Gwvenna Kelton, Rick Ganglhffatd Breck Sacra

Completed in accordance with Technical Specifications for United States Nuclear Regulatory Commission License Nos.

NPF-76 & NPF-80 April 2006 Authored by:

arrell Sherwood, Ph.D.

upervisor Health Physics Division and Peggy Fravi .D., ClAM Staff Consultant Chemistry Division Technical Review:

Leonard M. Earls, Ph.D., CHP Health Physicist Health Physics Division Approved by:

William T. Bulfard, CHP Manager Health Physics Division 2005 Annual Environmental Operating Report SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION

Table of Contents Page Executive Summary ............................................... 1-1 Site andArea Description ............................................... 2-1 Non-Radiological Environmental Introduction and Summary ............................................... 3-1 Non-Radiological Environmental Operating Report .................. .............................. 4-1 Environmental Conditions Aquatic and Ecological Monitoring ............................................... 4-1 Water Quality Management ............................................... 4-3 Air Quality Management ............................................... 4-6 Non-Radioactive Waste Management ............................................... 4-7 Chemical Control and Management ............................................... 4-9 Environmental Protection Plan Status ............................................... 4-10 Radiological Environmental Introduction and Summary ......................... ....................... 5-1 Radiological Environmental Operating Report ............................................... 6-1 Program Description ............................................... 6-1 Analysis ofResults and Trends ................................................ 6-1 Land Use Census ............................................... 6-9 QualityAssurance......................................................................................................... 6-9 Program Deviation ............................................... 6-10 List of Tables Table 1: Radiological Environmental Monitoring Program .......................................... 6-11 Table 2: Sample Media and Location Descriptions ......................... ................. 6-13 Table 3: 2005 Radiological Environmental Monitoring ProgramAnalysis Summary .......................................... 6-17 STP Nuclcar Operating Company

2005 Environmental Report List ofFigures Page Figure 4-1: 2005 Nonradioactive Waste Management .......... .................... 4-7 Figure 4-2: 2005 Nonradioactive Waste Generation ............................. 4-8 Figure 4-3: Hazardous Waste Generation Historical Comparison .4-8 Figure 6-1: Historical Comparison ofAverage Quarterly Beta Activity .6-1 Figure 6-2: Radiological Environmental Monitoring Program Designated Sample Location Map .6-2 Figure 6-3: Radiological Environmental Monitoring Program Zone Location Map (on-site) .6-3 Figure 6-4: Radiological Environmental Monitoring Program Zone Location Map ......................... 6-4 Figure 6-5: Environmental Dosimeter Comparisons ......................... 6-5 Figure 6-6: Historical Comparison of Cobalt-58 and Cobalt-60 in Main Cooling Reservoir Sediment .6-6 Figure 6-7: Calculated Cumulative Curies of Cobalt-60 in the Main Cooling Reservoir .6-6 Figure 6-8: Historical Comparison ofTritium Added to and Remaining in the Main Cooling Reservoir .6-6 Figure 6-9: Historical Comparison ofTritium Activity in Reservoir Relief Wells .6-7 Figure 6-10: Historical Comparison of Tritium Activity and Surface Water.6-8 Figure 6-11: Historical Comparison of TritiumActivity in ShallowAquifer Ground Water .6-8 Figure 6-12: 2005 Radiological Laboratory Quality Assurance Program Performance . 6-10 STP Nuclear Operating Company

PhotoBy: Jitdy Ayers 1-W_ lmewlllw This report describes the monitored within a 15-mile radius of the South Texas Project.

environmental monitoring Sampling locations are selected using weather, land use and water programs, radiological and non- use information. Two types of sampling locations are used. The radiological, conducted at the first type, control stations, are located in areas that are beyond South Texas Project during measurable influence of the South Texas Project or any other 2005. Included in this report nuclear facility. The sample results from these stations are used to are the Environmental Protec- explain radiation from sources other than the South Texas Project.

tion Plan Status, the results of Indicator stations are the second type of stations. The samples the Rad ological Environmental from these stations measure any radiation contributed to the Monitoring Program and the environment by the project. Indicator stations are located in areas Land Use Census. close to the South Texas Project where any plant releases would be Non-radiological environ- at the highest concentration. Prior to initial operation of the mental monitoring is performed South Texas Project, samples were collected and analyzed to each year as part of the station's determine the amount of radioactivity present in the area. These overall Environmental Protec- results are used as a "pre-operational baseline." Results from the tion program which is intended indicator stations are compared to both current control sample to provide for protection of results and the pre-operational baseline values to determine if non-radiological environmental changes in radioactivity levels are attributable to station operations values during station opera- or other causes such as previous nuclear weapons testing programs tions. Non-radiological moni- and natural variations.

toring encompasses water Radioactivity levels in the South Texas Project's environment:

quality, air quality, waste frequently fall below the minimum detection capabilities of state-generation and minimization, of-the-art scientific instruments. Samples with radiation levels that local aquatic and terrestrial cannot be detected are below the Lower Limits of Detection. The ecological conditions and more. United States Nuclear Regulatory Commission requires that In 2005, non-radiological equipment used for radiological monitoring must be able to detect monitoring by the station specified minimum limits for certain types of samples. This confirmed that the South Texas ensures that radiation measurements are sufficiently sensitive to Project's efforts to honor and detect small changes in the environment. The United States protect local environmental Nuclear Regulatory Commission also has a required "reporting conditions were successful. level." Licensed nuclear facilities must prepare a special report The South Texas Project and increase their sampling if any measured radiation level is equal continued to be rated by the to or greater than this reporting level. No sample from the Soulh Texas Commission on Environ- Texas Project has ever reached or exceeded a reporting level.

mental Quality as a high performer in the area of envi-

-MMM ronmenlal compliance, contin-ued to provide high-quality habitat areas for a variety of flora and fauna and continued to have no indications of negative non-radiological impacts to local environmental conditions.

Radiation and radioactivity in the environment are constantly 1-1 STP Nuclear OperatingContpany

Q05~tj-wnyia SS~~~~oD~

El-J1 Measurements made are divided into four categories or pathways based upon how the results may affect the public. Airborne, waterborne, ingestion and direct radiation are the four pathways that are sampled. Each pathway is described below.

The airborne pathway is sampled in areas around the South Texas Project by measur-ing radioactivity of iodine cannisters and particulate air filters. The 2005 airborne results were similar to pre-operational levels with only naturally occurring radioactive material unrelated to the operation of the South Texas Project detected.

t The waterborne pathway includes samples taken from surface water, ground water and drinking water. Also included in this path are sediment samples taken from the onsite Main Cooling Reservoir and the Colorado River. Tritium was the only man-made isotope consistently detected in water samples and was measured in the shallow aquifer, the Main Cooling Reservoir and other bodies of water onsite. Additional ground water samples were taken this year near the station. As expected based on models described in the South Texas Project's licensing basis documents, the levels of tritium found were near the concentration of the Main Cooling Reservoir or lower.

The average tritium level in the Main Cooling Reservoir remained similar to past years levels and remained both below United States Nuclear Regulatory Commission reporting limits and within United States Environmental Protection Agency drinking water standards. Sediment samples from the Main Cooling Reservoir continue to show traces of plant-related isotopes. The amount of plant-related isotopes in the reservoir sediment has decreased since 1992. Offsite sediment samples continue to show no radioactivity from the South Texas Project. This indicates that the station produces no detectable effect offsite from this pathway.

it The ingestion pathway includes broadleaf vegetation, agricultural products and food products. Naturally occurring isotopes were detected at average environmental levels in the samples. Man-made isotopes found in the samples were consistent with values found in pre-operational samples which indicates the South Texas Project has had no effect on the environment by this pathway.

4 The direct exposure pathway measures environmental radiation doses using ther-moluminescent dosimeters. These results are consistent with the readings from previous years and continue to show no effect from plant operations.

The South Texas Project continues to operate with no negative effect on the population or the environment. The exposure for people living in the area is maintained at less than one millirem per year. Environmental programs at the site monitor known and predictable relationships between the operation of the South Texas Project and the surrounding area. These monitoring programs verify that the operation of the South Texas Project has no detectable impact offsite and is well within state and federal regulations and guidelines. These programs are verified by the state of Texas through collection and analysis of samples and placement of the state's ther-moluminescent dosimeters and other inspections.

STP Nuclear OperatingComnpany 1-2

I -

.. *a .4

.5 r,j I

II I t 4

-_ J Photo by: Judy Myers

The South Texas Project is 21, 1987, obtained initial criticality on March 8, 1988, and was located on 12,220 acres in declared commercially operational onAugust 25,1988. Unit 2 Matagorda County, Texas, received a low-power testing license on December 16, 1988, approximately 15 miles obtained initial criticality on March 12, 1989, and was declared e southwest of Bay City along the commercially operational on June 19,1989. Both units together west bank of the Colorado produce enough electricity to serve over a million homes as well as River. Until early 2005, the serving as the largest employer and source of revenue for Mat-South Texas Project wasjointly agorda County.

owned by Texas Genco LP, AEP Texas Central Company, How the South Texas Project Works the City of Austin and the City of Fossil-fueled and nuclear-powered steam generating plants San Antonio. In early 2005,the operate on the same principle. Fuel is used to produce heat to AEP Texas Central Company convert water into high-pressure steam. The steam is directed interest in the South Texas through a turbine to turn a generator. In a fossil fuel plant, burning Project was transferred to Texas coal, lignite, oil or natural gas in a boiler produces the heat. In a Genco LP and the City of San nuclear plant, the reactor replaces the boiler and the "fissioning" or Antonio. The Houston Lighting splitting of uranium atoms inside the reactor produces the heat.

& Power Company was the The fuel for a nuclear reactor is uranium. It is formed into cylindri-original designated Project cal ceramic pellets, each about the size of the end of your little Manager for the owners. In finger. One pellet has the energy potential of about a ton of coal.

November of 1997, the STP Millions of these pellets are stacked in fuel rods that are arranged Nuclear Operating Company into assemblies that make up the core of the reactor. The use of assumed operational control of uranium allows us to conserve natural gas, oil and coal and to avoid the South Texas Project and the associated production of greenhouse gases.

responsibility for implementation A reactor starts operating when control rods in the core are of all environmental programs. withdrawn and fission begins. The fuel rods heat water circulating in The South Texas Project has sealed, stainless steel piping that passes through large heat exchang-two 1,250 megawatt-electric ers called steam generators. The water in the reactor is pressurized Westinghouse pressurized water to prevent boiling. This is why the South Texas Project's reactors reactors. Unit 1received a low- are called "pressurized water reactors."

power testing license on August SECONDARY LOOP STEAM ENERATOR TURB NE GENERATOR I CONDENSATE PUMP CIRCULATING PUMP RESERVOIR (7000 ACRE LAKE)

PRIMARY LOOP COOLING LOOP 2-1

2'0--,k3 if v /!z a/ /

Nuclear energy has The Site one of the lowest Sixty-five of the entire 12,220 impacts on the environ- acres at the South Texas Project ment. It's the most eco- are occupied by the two power efficient energy source plants. Plant facilities include a because it produces the 7,000-acre main cooling reser-most electricity in voir and a 47-acre essential relation to its minimal cooling pond. Many smaller environmental impact. bodies of water onsite include In 2004, nuclear wetlands, Kelly Lake, drainage M-y generation in the United ditches, sloughs and depres-States prevented 696.6 sions. Approximately 1,700 This hot, pressurized water million metric tons ofcarbon acres remain in a more natural heats a separate supply of water dioxide, 3.43 million tons of state as a lowland habitat in the steam generators to sulfurdioxide and 1.11 million although some ofthis land, produce steam that is directed tons ofnitrogen oxide from located east of the cooling through the blades of a turbine entering the earth's atmosphere. reservoir, is leased for cattle generator to produce electricity. Nuclear power plants were grazing. A 110-acre wetland The steam is then fed to a responsible for 37 percent of the habitat area was established in condenser where a separate total voluntary greenhouse gas 1996 on previously unused land supply o cooling water from the emissions reductions reported located northeast of the power reservoir turns it back into water by United States companies in plants. The area surrounding the that is then pumped back to the 2003. Additional information on South Texas Project is charac-steam generator for reuse. A nuclear energy and the environ- terized by coastal plain with diagram of the plant water ment can be found on the farmland and pasture predomi-systems is shown on the previ- website maintained by the nating. Local reliefofthe area is ous page. Nuclear Energy Institute at characterized by flat land, In addition to its safety sys- http://www.nei.org. approximately 23 feet above tems, the South Texas Project sea level.

has many built-in physical barriers that would prevent the release ofradioactive materials in the unl ikely event of an accident. The most visible ones are the 200-foot-tall, domed containment buildings with steel-reinforced walls four feet thick.

Inside each ofthese massive structures, two more concrete walls provide another 11 feet of shielding. The reactor vessel itself has steel walls six inches thick, and the fuel pellets inside it are sheathed in hardened metal tubes.

STP ATuclear Operating Comzpanmv2 2-2

e-44e- (111i"I OJI increasing diversity ofmigratory fowl and otherwildlife. Since 1997, the 15-mile-wide area that includes the South Texas Project has had the highest number of bird species nation-wide in the National Audubon Society's annual Christmas Bird Count.

The climate of the region is subtropical maritime, with continental influence. It is characterized by short, mild PholtoBy: JudyMyers winters and long, hot and humid TheArea summers. Rainfall is usually The economic base for this The South Texas Project is abundant throughout the year area is primarily agricultural home to many species of ani- with an annual average of related. Most of the land near mals. Inhabitants include approximately forty-two inches.

the site is used for the produc- American alligators, ospreys, The prevailing wind direction is tion of agricultural products. bald eagles and several hundred from the south-southeast, shifting In addition to the agriculture deer. In winter, literally hun- to north-northeast for short industry, there is commercial dreds of thousands of water- intervals during the winter fishing in the lower Colorado fowl, principally migratory geese months.

River, East and West Mat- as well as white pelicans and the agorda Bays, Intracoastal common tern, have found that Waterway and the Gulf of the plant's 7,000-acre cooling Mexico. Aquaculture farms reservoir provides a good also continue to be developed resting place during their migra-in the area. tions. The station also estab-Although the surrounding lished a man-made wetland area is heavily cultivated, habitat in 1996 that attracts an significant amounts ofwood-lands, thicket, brush, fields, marsh and open water exist to support wildlife. The area lies in the southern region ofthe central flyway and is host to an abundance of migratory birds.

The local estuary environments provide the necessary habitat for a variety of fish types to Owl IM complete their life cycles. The area also affords opportunity for recreational hunting and fishing. Photo By: Givenna Kelton STP Nuleiar Operating Conipan 2-3 2-3

N, \71 II , ""l V 7 a

I , Ie .,x ,, -g I "

f",4) - k

't j ,

a-t};N;,> 'a

c,- m3/44ct/o/67wolal~6 WIir. e /1a/Jmrl ftmmanl/?

wwo,(/l(l/

The South Texas Project is committed to the production of electricity in a safe, reliable, and economical manner using nu-clear energy. The station's programs, policies and business plan objectives also incorporate a commitment to environmental protection and sound environ-mental management. The dedication of station personnel who develop, implement, support and monitor site envi-ronmental protection programs and compliance exemplify this commitment.

Photo By: Judy Myers The station's commitment to sound environmental manage- Everyone has a responsibility to sions. The people at the South ment is illustrated by the follow- protect the environment. Com- Texas Project understand the ing environmental successes mitment to environmental need to balance economic, in 2005: responsibility is an integral operational and environmental component ofthe South Texas issues for the benefit ofthe t Continued classification as a Project operating policy. This station and the public. We high performer by the Texas responsibility reaches fuirther recognize our responsibility to Commission on Environmental than mere compliance with laws hold ourselves to the highest Quality based on the station's and regulations to encompass principles of environmental above-average environmental the integration of sound environ- stewardship for station activities.

compliance record in all areas mental practices into our daily considered, including water operational and business deci-quality, waste management and air quality compliance 4 Station involvement in community efforts to collect hazardous and non-hazardous waste for proper disposal and responsibly manage regional and county water resources.

, Restructuring of water supply agreements with granting authorities to secure a long- i_ i* i, l ,n- R-C(~~ I ., ,, _,i *.t term water supply source for f y ,~~~7-h 1,*'s.by.a operations at the South Texas Project. Photo By: Judy Myers 3-1 1STP Nuclear Operating Conipany

74-4" uhoto by: jitav Alvers

Environmental Conditions This section of the report community environmental Aquatic & Ecological describes the South Texas outreach programs and projects. Monitoring Project's non-radiological In 2005, the South Texas The location of the South environmental program perfor- Project co-sponsored and Texas Project falls within the mance and environmental participated in the Matagorda Texas Land Resource Area conditions from January 1 County Household Hazardous designation as coastal prairie through December 31,2005. Waste Collection day. The and can be divided into two The STP Nuclear Operating station also supported various broad ecological areas based on Company environmental staff bird counts and surveys spon- topography, soils and vegetation.

closely monitors environmental sored by federal and state The bottomland area is a conditions and performance at agencies and volunteer organiza- swampy, marshy area that the South Texas Project. Texas tions such as the annual National occupies approximately 1,700 Genco LP provided support and Audubon Society Christmas acres of the site near the Colo-technical assistance to the South Bird Count, the Great Texas rado River. This area provides Texas Project. In 2005, the Birding Classic and the United an important habitat for birds Texas Commission on Environ- States Fish and Wildlife Service and other wildlife. A spoil mental Quality conducted Colonial Waterbird Census. impoundment constructed in compliance inspections for The Texas Commission on 1972 by the United States Army onsite beneficial land application Environmental Quality classified Corps ofEngineers is included in and air quality compliance the South Texas Project as a this area. In addition, a 110-operations at the station with no high performer in 2005 based on acre wetland habitat area that findings or violations issued. the station's above-average attracts a variety of bird groups In 2002, the South Texas environmental compliance and other wildlife was estab-Project applied for recognition record. Facilities, such as the lished in 1996 on previously as a partner in the CLEAN South Texas Project, are classi- unused land located northeast of TEXAS program administered fied by the state as a high per- the power plants. The remaining by the Texas Commission on former, average performer or area of the site offers diverse Environmental Quality. The poor performer based on that habitats for mammals and state subsequently granted facility's compliance history. several types ofbirds. The approval of the station's applica- The state's classification of the South Texas Project environ-tion. CLEAN TEXAS is a South Texas Project as a high mental staff regularly monitor voluntary environmental leader- performer was based on the the site's environs for changing ship program comprised of station's environmental perfor- conditions. Ecological condi-industries, nonprofit groups, mance over the last five year tions onsite in 2005 remained counties and other organizations period.

with a common goal to protect the state air, water and land resources. As a partner in the CLEAN TEXAS program, the South Texas Project is commit-ted to meeting established environmental improvement goals, maintaining and improving internal programs and continuing 4-1 STP Nuclear Operating Company

2100c5 9 mfl' el,,r lot at the station. Special precautions were taken to protect the nesting area and a small, but growing population of both species has continued to return each year to the site.

Intensive bird nesting continues throughout the lowland habitat particularly in a heron rookery around the perimeter of Kelly Lake. U. S. Fish and Wildlife Service biologists estimate that approximately one-third of Photo By: Rick Ganghiff Texas' breeding adult Gull-billed generally unchanged and satis- bird species listed on the state Tern population, considered to factory. and federal threatened or be in decline, nest on the internal In 1996, the South Texas endangered species lists have dikes ofthe Main Cooling Project and Houston Industries been observed at the wetland Reservoir at the South Texas Incorporated initiated ajoint habitat and elsewhere onsite.

Project.

effort with Ducks Unlimited, These include nesting bald The South Texas Project Texas Pa rks and Wildlife, the eagles, peregrine falcon, wood continues to monitor important United Slates Fish and Wildlife stork, white-faced ibis and wildlife species to detect popu-Service, and the United States white-tailed hawk. Additional lation changes. Informal obser-Department ofAgriculture migratory and resident bird vations by station and Texas Natural Resources Conservation species such as a variety of Genco LP personnel continued Service to establish a 110-acre ducks, geese, turkey and to indicate that the site provides wetland habitat for migratory pheasant have been observed high-quality habitat in which a waterfowl at the station. The during informal surveys ofthe wide range of animals live. ThIe wetland project received the site's diverse natural and man-site continues to attract extensive Ducks Unlimited Habitat Con- made habitats.

wildlife populations, offering a servation Award in 1996 and a The South Texas Project refuge for resident species as United Slates Department of continues to provide vital habitat well as seasonal migrants. Th-Agriculture Conservation Award for more than 125 different lowland habitat located between in 1999 fir habitat preservation. species of wintering and resident the Colorado River and the east This habi at area immediately birds, including the common tern bank ofthe Main Cooling attracted a variety of bird and white pelicans. In 2005, for Reservoir offers a significant species and other wildlife and the ninth "yearin a row, Mat-source ofwater year-round.

has continued to support an agorda County, which includes These natural resource areas, in increasing diversity of plants and the South Texas Project, was concert with numerous addi-animals. ranked number one in the tional wetland and grassland The South Texas Project is National Audubon Society's areas, offer the key ingredients located on the state-sponsored annual Christmas Bird Count necessary to sustain the exten-Great Texas Coastal Birding with 251 species identified. In sive wildlife population at the Trail that spans the entire Texas 1998, a small number of black South Texas Project.

Gulf Coast from Brownsville to skimmers and least terns estab-the Louisiana border. Several lished nests on a remote parking STP Nuclear Operating company 4-2

t )/I ,/o~,

,,59,T,,, ,,,,.&/,

ZL,(I/ lit;.Jr'C7mmewl(Il^// (_-A(_?J'.//;}/Z a(/LC1J'/

Water Quality Management . 1> f . water to cool crucial plant components is capable of Water is an essential compo-impounding 388 acre-feet of nent in electricity production, water. Various water rights and all electric utilities must comply with extensive federal, permits, contractual agreements state and local water regulations. and compliance documents authorize the South Texas These regulations govem virtu-Project to maintain these reser-ally every aspect of business operations at the South Texas voirs, impound water diverted Project. Water usage and from the Colorado River, and to wastewater treatment onsite are circulate, divert and use water from the reservoirs for industrial regulated under the Safe Drink-ing WaterAct, the Federal purposes to operate the plant.

These permits also limit the rate Clean Water Act and the Texas Photo By: Breck Sacra intermittent pumping periods. of diversion from the Colorado WaterQualityAct. Collectively, River. The South Texas Project these acts provide for the Surface water diverted to the diverted 5,694 acre-feet from safeguarding ofpublic drinking Main Cooling Reservoir from water supplies and maintaining the Colorado River in 2005 for the Colorado River accounted the integrity of state and federal for approximately 81 percent of the Main Cooling Reservoir fill waters. the water used at the South operations while preserving The South Texas Project uses adequate freshwater flow Texas Project in 2005. Infor-both surface water and ground- conditions for downstream bay mation regarding water use in water for station purposes. and estuarine ecosystems. In Texas can be found on the Groundwater provides onsite 2005, the South Texas Project website maintained by the Texas and the Lower Colorado River drinking water for station Water Development Board at personnel, replenishes the Authority finalized an amended http://www.twdb.state.tx.us/.

Most of the water used by the water rights contract for a Essential Cooling Pond, and is used for other industrial pur- secure water supply source to South Texas Project is needed support reliable long-term poses onsite. Consistent with the to condense steam and provide station's environmental principles cooling for plant generating operation of the station while providing flexibility to the Lower encouraging efficient water systems. The majority of this water is drawn from and re- Colorado RiverAuthority for usage and conservation, ground-turned to the station's Main supplying the source water. The water usage is carefully managed agreement also assists the to conserve this important Cooling Reservoir. The Main Lower Colorado RiverAuthority resource. Groundwater pro- Cooling Reservoir is a 7,000-acre, above grade, off-channel to plan its future water supply vided approximately 19 percent of the water utilized in 2005 by reservoir capable of impounding strategies to help meet water the South Texas Project. Sur- 202,600 acre-feet ofwater at its demands identified in the Senate Bill I regional waterplanning face water from the Main maximum level. Reservoir makeup water is withdrawn process discussed later in this Cooling Reservoir and the intermittently from the adjacent report.

Essential Cooling Pond is used as cooling water for plant Existing federal and state Colorado River. In addition, the water quality standards are activities. Water from the Essential Cooling Pond, a implemented and enforced Colorado River replenishes the 47-acre, below grade, off-through the Texas Pollutant Main Cooling Reservoir via channel reservoir that supplies 4-3 STP Nuclear Operating Company

2100c5 ~UU6lep(irli Discharge Elimination System Station conditions did not General Permit with the United (TPDES) permit program to require site aquatic monitoring States Environmental Protection restore and maintain the state's studies be conducted in 2005 Agency in 1998. The Texas waters. In 1998, the State of nor were any additional studies Natural Resource Conservation Texas assumed authority to required by the United States Commission issued a TPDES administer and implement the Environmental Protection Multi-Sector General Permit in federal National Pollutant Agency or the State of Texas August of200l. The station Discharge Elimination System either by way of station dis- filed a Notice of Intent in (NPDES) program. Accord- charge permits or otherwise. November of 2001 to obtain ingly, federal and state require- Station wastewater discharges coverage under the state permit ments were consolidated in for 2005 were 100 percent and the station's Storm Water November of 2000 into one compliant with state and federal Pollution Prevention Plan was wastewater discharge permit for water quality standards while modified accordingly to reflect the station under the TPDES conserving and maximizing these changes. This plan is a permit program. This permit efficient water usage at the working document that is revised was renewed in 2005. Under station. whenever there is a change in this permit program, the South In addition to the wastewater design, construction, operatio a Texas Project monitors, records discharge permit program, the or maintenance that has a sig-and reports the types and Federal Clean WaterAct, as nificant effect on the potential for quantities ofpollutants from amended in 1987, requires the discharge ofpollutants fro:-n wastewater discharges to ensure permits for storm water dis- the station.

that we meet or exceed the charges associated with indus- Following a severe drought in stringent levels set in the permit. trial activity. The South Texas 1996, the Texas Legislature A monthly monitoring report is Project Storm Water Pollution recognized the need to address a submitted to the Texas Commis- Prevention Plan, implemented in wide range of state water sion on Environmental Quality October of 1993, ensures that resource management issues. In for wastewater discharges. potential pollution sources at the 1997, the Texas Senate drafted Reports identifying ground and site are evaluated, and that legislation known as Senate B ill surface water use are also appropriate measures are 1 to address these issues and to submitted annually to the Texas selected and implemented to develop a comprehensive state Commission on Environmental prevent or control the discharge water policy. Towards this end, Quality and Texas Water Devel- ofpollutants in storm water this legislation required that the opment Board. runoff. In September of 1998, Texas Water Development Wastewater generated at the the United States Environmental South Texas Project is Protection Agency modified the processed and discharged to the storm water permit program to onsite Main Cooling Reservoir require facilities, such as the to be re-used by the station as South Texas Project, permitted cooling water for plant systems. under a baseline general permit No water was released from the to obtain permit coverage under reservoir in 2005 other than a multi-sector general storm designed leakage. The station water permit. Accordingly, the continued its satisfactory waste- station filed a Notice of Intent water discharge compliance for transfer from the General performance record in 2005. Permit to the Multi-Sector tPhioto BY: (Giennla Aceton STP Nuclear Operating Company 4-4

/c~ll~ff-*~(C4/w S,- "c (,/;-;4/ZLaS C/w;.iyaomewl/l.t. /e"11;MV7 9I 5ee,'w ( E(L.'/I I~o

_ strategies review and comment on the ito meet Coastal Plains Groundwater future Conservation district rules prior water to their adoption in 2004. In 2005, the South Texas Project s S ~- ksupply registered the station's onsite g -t-iprojections groundwater wells with the forthe District and continues to monitor iregion and usage according to the update the requirements ofthe District's

, }existing rules. Additional information plan regarding the Coastal Plains accord- Groundwater Conservation fX _ ingly- District can be found on their Photo By: Gwvenna Kelton Additional website at http:ll Board create a statewide water information regarding regional www.coastalplainsgcd.com/.

plan that emphasizes regional water planning in Texas can be The South Texas Project planning. Sixteenplanning found on the website maintained initially developed, submitted regions were created, each by the Texas Water Develop- and implemented a station Water tasked to prepare a regional ment Board at http:ll Conservation Plan in 1999 in plan for the orderly develop- www.twdb.state.tx.us/. accordance with state water use ment, management and conser- Senate Bill 1 also required regulations. The purpose ofthe vation of water resources. The groundwater conservation station's Water Conservation South Texas Project was chosen districts to develop groundwater Plan is to identify and establish to represent the electric generat- management plans with principles, practices and ing utility interest for the water- estimates on the availability of standards to effectively conserve planning region that encom- groundwater in the district, and efficiently use available passes the lower Colorado details of how the district would water supplies and projected River Basin. Plans subsequently manage groundwater and average industrial water submitted by each planning management goals for the demand. This plan was revised, region were incorporated into a district. The water planning and updated and re-submitted to the State Water Plan in the year management provisions were state in 2005.

2001. However, water resource further clarified in 2001 with the The South Texas Project planning is a continuous process enactment of Senate Bill 2. station personnel understand and the Regional and State Accordingly, the Coastal Plains that the water resources of the water plans must be updated Groundwater Conservation state are a critical natural every five years. The regional District encompassing resource requiring careful water plan update was ap- Matagorda County was management and conservation to proved in December 2005 for confirmed by local election in preserve water quality and incorporation into the 2006 late 2001. The purpose of the availability. Accordingly, the State Water Plan. The South District is to ". .. manage and station continues to explore and Texas Project continues to protect the groundwater support efforts focusing on the actively participate in the Lower resources of the District." The efficient use of water resources Colorado Regional Water South Texas Project was and reduction of water waste.

Planning Group to identify actively involved in providing 4-5 STP Nuclear Operating Conmpany

20 c Cfq~~~ei//',z Act, the Federal Clean AirAct and numerous associated amendments that protect air resources from pollution by controlling or abating airpollution and emissions. The mzjor regulated air emission sources at the South Texas Project include one fossil-fueled boiler and various emergency diesel generators.

The South Texas Project has one oil-fired auxiliary steam boiler available to furnish steam for plant use when steam is not available from Air Quality Management the nuclear steam supply system. In addition Air emission sources at the South Texas Project fall to the auxiliary steam boiler, a number of under the scope of air pollution regulations fossil-fueled diesel generators are located promulgated under the Texas Clean AirAct and the onsite. These diesels are designed to provide Federal Clean AirAct and the numerous associated emergency power to various plant systems or amendments. The purpose of these regulations is to buildings in the event of a loss of power. This protect air resources from pollution by controlling or equipment is not normally needed for daily abating airpollution and emissions. Regulated operations and the station does not use it to emission sources at the South Texas Project include produce electricity for distribution. Routine a fossil-5uel boiler, emergency diesel generators, fire- maintenance runs are conducted to ensure fighting training and other minor maintenance availability if needed and for equipment main-equipment and activities. tenance.

Unlike conventional electrical generating stations, In 1990, amendments to the Federal Clean nuclear powerplants do not bum fossil fuel. AirAct mandated a new permitting program to Therefore, the South Texas Project produces clearly define applicable air quality require-virtually no greenhouse gases or other air pollutants ments for affected facilities such as the South that are the typical by-products of industrial Texas Project. This program is commonly production processes. The use of emissions-free known as the Title V Operating Permit Pro-nuclear power is a significant contributor to the gram and is administered by the state. The preservation ofour community's clean air Texas Natural Resource Conservation Con.-

resources. The South Texas Project uses small mission (now known as the Texas Commission amounts of fossil fuel for backup and emergency on Environmental Quality) issued a Federal equipment. Air emission sources at the South Texas Operating Permit in January of2000 for the Project f all under the scope ofair pollution South Texas Project granting authority to regulations promulgated under the Texas Clean Air operate identified emission sources at the station in accordance with applicable permit and regulatory requirements. The Texas Commission on Environmental Quality revised the permit in July of 2003 to address changes in state requirements that affected the existing permit. The station initiated a request for permit renewal in 2004. Permit renewal efforts continued throughout 2005. No deviations with the Federal Operating Permit's requirements occurred in 2005.

STP Nuclear Operating Company 4-6

tG_ LIW(.1_111111'111efillal a-L2_'-' '

Non-Radioactive Waste 2005 Nonradioactive Waste Management Management South Texas Project Solid waste management procedures for hazardous and Recycle non-hazardous wastes generated 69.8%

at the South Texas Project ensure that wastes are properly dispositioned in accordance with applicable federal, state and local environmental and health regulations. By regulatory definition, solid waste includes Landfill Biological 14.0%

solid, semi-solid, liquid and Treatment Incineration &

gaseous waste material. The 14.3% Fuel Blending 1.9%

Texas Commission on Environmental Quality, which Figure 4-1 administers the Texas Solid The registration is revised regulations encourage the Waste Disposal Act and also the whenever there is a change in recycling, recovery or re-use of federal Resource Conservation waste management practices at waste when possible to reduce and Recovery Act program, is the site. Waste handling and the amount of waste generated the primary agency regulating disposal activities are or disposed of in landfills. Waste non-radioactive wastes summarized and documented in generated from heat exchanger generated at the South Texas a waste summary report for the cleaning activities in 2005 was Project. The Texas Commission South Texas Project that is shipped for biological treatment.

on Environmental Quality submitted annually to the Texas Approximately 70 percent ofthe regulates the collection, handling, Commission on Environmental industrial non-radioactive waste storage and disposal of solid Quality. generated in 2005 at the South wastes, including hazardous Hazardous waste Texas Project was recycled or wastes. The transportation of accumulation at the South Texas processed for re-use. (Reference waste materials is regulated by Project in 2005 was limited to a Figure 4-1) The South Texas the United States Department of maximum holding period of 180 Project ships waste oil, grease, Transportation. days. The Resource electrohydraulic fluid, adhesives, The South Texas Project is Conservation and Recovery Act liquid paint and solvent for fuel classified as a small quantity and Texas Solid Waste Disposal blending and thermal energy generator of industrial solid Act also requires the use of recovery. Used oil, diesel fuels wastes. Texas Commission on proper storage and shipping and antifreeze solutions are sent Environmental Quality containers, labels, manifests, to a recycling vendor for re-regulations require that industrial reports, personnel training, a processing. Lead-acid batteries solid wastes generated at the spill control plan and an are returned, when possible, to South Texas Project be accident contingency plan. the original manufacturer for identified to the Commission and Plant personnel routinely inspect recycling or are shipped to a these are listed in the Texas areas throughout the site to registered battery recycler, Commission on Environmental ensure wastes are not stored or thereby reducing the volume of Quality Notice of Registration accumulated inappropriately. hazardous waste that might for the South Texas Project. Station policies and otherwise be generated. A site 4-7 STP Nuclear Operating Company

00j(9 _Dqobt-estimated 70 tons of scrap metal minimization and source were shipped for recycling in reduction efforts by employees 2005. The station continues to allowed the South Texas Project explore new areas where to re-classify as a small-quantity recycling may be expanded or generator early in 2004.

initiated. Hazardous waste accounts for Non-radioactive solid waste only a small portion of the waste that cannot be shipped for generated at the South Texas recycling is shipped for disposal. Project; however, minimization Municipal-type trash is and reduction of hazardous transported to an offsite landfill. waste generation where feasible Construction-related non- remains an important goal at the combustible, innert debris, if station. (Reference Figures 4-2 generated, may be placed in the and 4-3) onsite landfill. Successful waste 2005 Nonradioactive Waste Generation South Texas Project Non-Hazardous Waste 94.6% -

Universal Waste 0.4%

Hazardous Waste Used Batteries 0.1%

4.9%

Figure 4-2 Hazardous Waste Generation Historical rnuto UY': 1uay svyers paper recycling program results Comparison South Texas Project in the collection of several tons of paper each year. In 2005, the station collected approximately 60 tons of paper

'A for recycling. Every ton of To paper recycled saves it approximately 17 trees, eliminates approximately three 1998 1999 2000 2001 2002 2003 2004 2005 cubic yards of landfill material l Hazardous Waste from Cleanup of an Onsite Spill and saves enough energy to I* Hazardous Waste I power the average home for six months. In addition, an Figure 4-3 STP Nuclear Operating Company 4-8

- 4~?~(46/6qea/'

~ ~ §2 wllyl4zi P~LCLr Chemical Control & standard operating procedures, The South Texas Project Management policies and programs to emphasizes awareness training In late 2004, the station minimize the generation ofwaste for spill prevention and maintains completed and implemented the materials, control chemical usage station readiness to respond IntegratedSpill Contingency and prevent spills. The South should a spill occur. Spill Planfor the South Texas Texas Project also evaluates response team members receive ProjectElectric Generating chemicals and products annual refresher training in Station to replace the previous proposed for use, which could hazardous material incident Oil andHazardousMaterial come in contact with plant response. No significant or ContingencyPlan for the components. Site procedures consequential spills occurred in station. TheIntegratedSpill address the evaluation, storage, 2005. Remediation of a small ContingencyPlanconsolidated use, spill control, and disposal historical oil spill area multiple federal and state requirements of chemicals. discovered onsite was requirements into one plan. The These guidelines assist in completed and state approval plan is implemented through reducing wastes, ensure proper received in 2005 for closure of standard site operating packaging for disposal and remediation actions in procedures and guidelines. The mitigate the consequences of accordance with the Texas Risk South Texas Project uses inadvertent spillage. Reduction Program.

4-9 STP Nuclear Operating Conmpany

• ?OOo gY7/)6t't aekt;jrpmejdg/'

Environmental Protection Plan Status The South Texas Project's Environmental Protection Plan was issued in March of 1989 to provide for the protection of non-radiological environmental values during operation of the South Texas Project.

This report reviews Environmental Protection Plan non-compliances identified by the plant in 2005 and the associated corrective actions taken to prevent their recurrence. Potential nonconformities are promptly addressed, as identified, to maintain operations in an environmentally acceptable manner. The station uses its Corrective Action Program to document these conditions and track corrective actions to completion. Internal assessments, reviews and inspections are also used to document plant compliance.

This report also reviews non-routine reports submitted by plant personnel and any activities that involved a potentially significant unreviewed environmental question. A proposed change, test or experiment is considered to present an unreviewed environmental questions if it concerns:

I) A matter that may result in a significant increase in any adverse environmental impact previously eval uated in the Final Environmental Statement related to the Operation of South Texas Project, Units 1 and 2 (Docket Nos. 50-498 and 50-499), environmental impact appraisals, or in any decisions of the Atomic Safety and Licensing Board; or,

2) A significant change in effluents or power level; or,

3) A matter not previously reviewed and evaluated in the documents specified in (1) above, that may have a significant adverse environmental impact.

No unreviewed environmental questions were identified in 2005.

Events that require reports to federal, state or local agencies other than the Nuclear Regulatory Commission are reported in accordance with the applicable reporting requirements. The Nuclear Regulatory Commission is provided with a copy of any such report at the time it is submitted to the cognizant agency. If a non-routine event occurs and a report is not required by another agency, then a 30-day report to the Nuclear Regulatory Commission is required by the Environmental Protection Plan.

No such 30-day or other non-routine report of this type was required in 2005.

Photo By: Judy AMyers STP Nuclear Operating Company4 4-10

St Photo

The Radiological Environmental Monitoring Program is designed to evaluate the radiological impact of the South Texas Project on the environment by collecting and analyzing samples for low levels ofradioac-tivity. Measurements ofsamples from the different pathways indicate that there is no detectable effect of the operation of the power plants offsite.

The amount of Cobalt-60 in the Main Cooling Reservoir continues to decrease due to the processing of effluents. Only natural radioactive material has been identified in air samples in 2005. The measurements of direct radiation onsite and offsite indicate no effect from the power plants. Samples of fish and meat collected and analyzed show no plant related isotopes are present. Water samples from onsite drinking water supply and offsite sampling stations on the Colorado River show only natural background radioac-tivity.

Tritium is a radioactive isotope ofhydrogen that is produced in the reactor and cannot be removed from effluents released to the Main CoolingReservoirbecause it is apart of the watermolecule. Tritium also occurs naturally in the environment. During the design of the plant the presence oftritium in the Main Cooling Reservoir, the shallow aquifer, and in discharges from reliefwells to surface water drainage pathways, was anticipated and accounted for in the licensing ofthe station. Tritium has been identified and analyzed in groundwater and surface water samples and the concentrations remain below the Environnen-tal Protection Agency (EPA) and State of Texas drinking water limits of 20,000 pCi/kg '.

Several other nuclear power plants have identified tritium in groundwater near underground process or effluent pipe pathways that exceeded the EPA drinking water limits. To verify that this condition did not exist at the South Texas Project, test wells near underground process and effluents pipes in close proxim-ity to the plant were sampled and analyzed for tritium. Results were below the EPA drinking water limi ts.

Analysis of the data collected from the implementation ofthe Radiological Environmental Monitoring Program indicates that the operation of the South Texas Project has no radiological impact.

Note 1: Standardsfor radioactivity in drinking water limits dose to the public of 4 ,rem/year Pm 1,b J yersI Phloto by: Judy M~yers 5-1 STP Nuclear Operating Company

r-w - WI sig-o N, 1

~ ~fWL t _ Chapter 6 ; i Photo by: Judy Myers STP Nuclear OperatingCompany

~(t(1~q Wq/SlQbined/~4emwtny Mj .

indicator and control stations. types that may be used for Program Description Indicator stations are locations on additional information. Figure The South Texas Project or off the site that may be 6-4 illustrates the zones used initiated a comprehensive pre-influenced by plant discharges when collection locations are not operational Radiological during plant operation. Control permanent sample stations.

Environmental Monitoring stations are located beyond the Program in July 19 8 5. That measurable influence of the South Analysis of Results and Trends program terminated on March 7, Texas Project or any other Environmental samples from 1988, when the operational program was implemented. The nuclear facility. Although most areas surrounding the South samples analyzed are Texas Project continue to indicate pre-operational monitoring program data forms the baseline accompanied by a control sample, no significant radiological effects it should be noted that this from plant operation. Analytical against which operational changes practice is not always possible or values from offsite indicator are measured.

meaningful with all sample types. sample stations continue to trend Critical pathway analysis Fluctuations in the concentration with the control stations. Onsite requires that samples be taken from water, air, and land of radionuclides and direct indicator samples continued to radiation exposure at indicator environments. These samples are increase or decrease in measured obtained to evaluate potential stations are evaluated in relation values as expected.

radiation exposure. Sample types to historical data and against the Average quarterly beta activity are based on established control stations. Indicator from three onsite indicator pathways and experience gained stations are compared with stations and a single control at other nuclear facilities. Sample characteristics identified during station for air particulate samples locations were determined after the pre-operational program to have been compared historically considering site meteorology, monitor for radiological effects from 1988 through 2005 (see Colorado River hydrology, local from plant operation. Figure 6-1). The average of the demography and land use. Several sample identification onsite indicators trend closely with Sampling locations are further methods are used to implement the offsite control values. The evaluated and modified according the program. Figures 6-2 and 6-3 comparison illustrates that plant to field and analysis experience. are maps that identify permanent operations are not having an impact Table 1 lists the required sample sample stations. Descriptions of on air particulate activity even at the analysis and frequency of sample stations shown on Figures Sensitive Indicator Stations (# 1, collection at the end of this 6-2 and 6-3 are found in Table 2. # 15, and # 16). These stations are section. Table 2 also includes additional located near the plant and are Sampling locations consist of sampling locations and media located downwind from the plant Historical Comparison of Average Quarterly Beta Activity from Indicator and Control Air Samples 1988 - 2005 0 0020 0.030 l Sttion 001. *015 & *016 Averageof Onit Indicators l

-Station #037 Offsite Control Photo By: Gwenna Kelton Figure 6-1 6-1 STP Nuclear OperatingCompany

2-00) '

Designated Sample Locations Figure 6-2 STP Nuclear Operating Company 6-2

.vaa.eavckzL n 1 02P('(Y('

Q ' 2e6A;'W I)

Designated Sample Locations (On Site Sample Locations)

REMP ON SITE SAMPLE LOCATIONS 2X SCALE Figure 6-3 6-3 STP Nuclear Operating Company

200J dq/-6j/ men Ia! &<eA d Zone Location Map Zones are determined in the following manner:

• The first character of the station number is "Z" to identify it as a zone station.

Figure 6-4

• The second character is the direction coordinate number 1-8.

• The third character is the distance from site numbers 1-6.

STP Nuclear OperatingCompany 6-4

~ 7 r/ioqe/ iur , eda 1x~anq 6 /e0.

Environmental Dosimeter Comparisons 22 Aver.ge of Indicator Stations Average of Control Stations Senslvd 20

~16 d

o_ 14 t 12 Unit #1 Criticality - 03/08/88 Unit #2 CritIcality - 03/12/i 10 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 Results by Quarter Figure 6-5 based on the prevailing wind stations. The Control Stations are direct radiation in the direction. The beta activity greater than 10 miles from the site environment.

measured in the air particulate and are in the direction of the least Bottom sediment samples are samples is from natural prevailing winds (Stations #23 taken from the Main Cooling radioactive material. As a routine and #37). The Sensitive Indicator Reservoir each year. Figure 6-6 part of the program, we perform Stations are in the directions that shows the positive results from gamma analysis on quarterly the wind blows most often and are two plant-produced radioactive composites of the air particulate one mile from the power plants on materials, Cobalt-58 and Cobalt-samples to determine if any Farm-to-Market Road 521 60. The Cobalt-58 and Cobalt-60 activity is from the South Texas (Stations # 1, # 15 and # 16). The inventory in the reservoir has Project. The gamma analysis Indicator Stations are the decreased since 1992 because of revealed that it was all natural remainder of the stations equipment installed to reduce radioactivity. excluding Stations #38,40, and radioactive effluents. The amount Direct gamma radiation is 42. The values plotted are the of Cobalt-58 has decreased monitored in the environment by averages for all of the stations below levels that can be reliably thermoluminescent dosimeters according to type. Figure 6-5 detected. The concentration of located at 40 sites. The natural indicates changing conditions in Cobalt-60 in the reservoir bottom direct gamma radiation varies the area of the individual stations. sediment samples varies but is according to location because of The average of the Control within the expected range. Figure differences in the natural Stations is higher than the other 6-7 demonstrates the decline in radioactive materials in the soil, stations because station #23 is in the total amount of Cobalt-60 in its moisture content and the an area that has a slightly higher the reservoir.

vegetation cover. Figure 6-5 natural background radiation, Cesium- 137 was also measured compares the amount of direct probably due to the soil in four of five Main Cooling gamma radiation measured at the composition. The trends of Reservoir bottom sediment plant since the fourth quarter of Figure 6-5 clearly show that the samples. However, Cesium-137 1985 for three different types of power plants are not adding to the was present in the environment 6-5 STP Nuclear OperatingCompany

200& %M-C&ed W before the operation of the South Historical Comparison of Cobalt-58 & Cobalt-60 in Texas Project and the sample Main Cooling Reservoir Sediment 1986 - 2005 concentrations were approximately equal to pre-1800 tStatiom#215: Cobalt-5 E

operational values. The Cesium-1600 Plaut Diwcharge 137 measured in the Main Cooling

• Statlon#215 Cdalt-60 1400 Plant Disharg Reservoir does not suggest an bD1200 _

i ]_tadon#216:

Bisda Cebalt-M Structu increase due to plant operation.

I______________ StI.O..#216: Cobalt-60 Tritium is a radioactive isotope

@ C 1000 - _

• i wa Structures 8000 of hydrogen and is produced The Cobalt-58 activityin the during plant operation. Tritium resetrote has decreased to 600 60_deteced belotrlevels that cm be The mvetcry of produced in the reactors is a part 400 Cobalt-60 has decreased since 1992dueto radioactive decay of the water molecule.

200 _ad decdedliquid effuests. Wastewater is treated to remove impurities before release, but 0 19861997 1988 1989 t990 1991 1992 1993 1994 1995 1996 t1997 t99t t1999 2900 2001 2002 2003 2004 24 200-5 tritium cannot be removed because it is chemically part of the Figure 6-6 water molecule. Some of the Calculated Cumulative Curies of Cobalt-60 in the tritium is released into the Main Cooling Reservoir atmosphere and the remainder is released into the Main Cooling Reservoir. The tritium is removed from the Main Cooling Reservoir c by evaporation, movement into the shallow aquifer, and by percolation from the relief wells that are a part of the dike's

-rp o stabilization system. Figure 6-8 N - -zl,,oe

- f 01 P 7

,e"e ,'o shows the amount of tritium released to the Main Cooling ASSUMPTIONS:

l - Radioactive decay is the only mechanism for removal from the Main Cooling~ Reservoir

2. The initial time for calculating the remaining radioactivity is Jaly I ofthe year released.

Reservoir each year and the amount present during the last Figure 6-7 quarter of each year. This indicates that almost half of the Historical Comparison of Tritium Added to and Remaining in the Main Cooling Reservoir tritium is removed from the 1989- 2005 reservoir annually. One of the 4000 pathways tritium escapes from the 3500t reservoir is by evaporation.

3000 A Rainwater was collected during 2005 to determine if the tritium remained in the local area. Tritium was not found in any rain water 250 samples.

The concentration of tritium in the Main Cooling Reservoir 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 increased in 2005. Tritium enters 2005 l Tti- RHeetad tohe Main Co-hesg R-meri ETitita Ma rd inthe MamaCooling R-rrveml the sloughs and ditches of the site as runoff from the relief wells that Figure 6-8 surround the reservoir. Examples STP Nuclear Operating Company 6-6

M4 adiowie'al vl lerq -- ---

Ohene~a "eh&/2 Historical Comparison of Tritium Activity in Reservoir Relief Wells 1990 - 2005 30,000 pirCunes per Kilogram - Nuclear Regulltory C-om-ision Repotting Lvel 30000 25000- 20,000 pi-Csrlei per Kilog-sm - Enviroere1 Protection Ag9eny Reporting Level 20000 -

15000/

8 10000 199 15sl IM 1993 9994 1995 1996 1997 199 1999 2000 200 20 2003 2004 2005 O Main Cooling Reservoir Relief Well (onsite) #238 1EMain Cooling Reservoir ReliefWell (onsite) #701 Figure 6-9 of tritium in the relief wells is In 2005, the concentration in- near the plant. Concentration shown in Figure 6-9. Relief well # creased in this well but remained a ranged from below limits of 238 was sampled until the fraction of the concentration of detection to that of the Main dependable relief well #701 was the Main Cooling Reservoir. The Cooling Reservoir. Studies will be identified. The tritium concentration should rise and fall continued into 2006 to better concentration in eight surface if it follows the trends observed characterize the tritium in the water sample points for 1988 in surface water samples onsite. shallow aquifier close to the plant.

through 2005 is shown in Figure In 2000, samples were collected The drinking water onsite is 6- 10. The specific sample point from another shallow aquifer well pumped from deep aquifer wells locations can be found in Table 2. southeast of the Main Cooling Re- and is tested quarterly to verify Tritium levels in the onsite sloughs servoir. Samples have been tritium is not present. The waters and ditches are begining to collected quarterly and the tritium in the reservoir and other surface stabilize as a fraction of the Main levels have remained near that of bodies of water onsite are not Cooling Reservoir concentration. the relief wells as shown in used as drinking water. The only The tritium concentrations in the Figure 6-11. way tritium could be introduced sloughs and ditches are a fraction During 2005, tritium in the into humans is by eating fish from of the Main Cooling Reservoir groundwater was identified at the reservoir, which is not per-because of dilution with rainwater several nuclear plant sites that mitted. If a person ate one and radioactive decay of the exceeded regulatory limits and the hundred and twenty pounds of fish tritium as it moves through the sources were identified to be from a year from water that contained dike's relief system. the plant piping or structures. To the United States Nuclear Tritium was identified in a verify that this condition did not Regulatory Commission reporting shallow (ten to forty feet deep) exist at the South Texas Project, level (30,000 picoCuries per aquifer test well approximately an additional thirteen test wells kilogram), that person would seventy-five yards south of the were sampled and analyzed for receive less than one millirem.

reservoir dike base during 1999. tritium inside the Protected Area This is insignificant compared to 6-7 STP Nuclear Operating Company

2005 9 }u'rg.nYjt1Yu'

%M5-r Historical Comparison of Tritium Activity in Surface Water 1988 - 2005 30,000 picoCuries per Kilogram - Nuclear Regulatory Comrnision Reporting Level 30000 7/ 20,000 picoCuries per Kilogram - Environmental Protection Agency Reporting Level

! 25000 E y 20000-5000 1989 1989 1990 1991 1992 1993 1994 1995 1996 1997 1993 1999 2000 2001 2002 2003 2004 20105 11 River Sample Upstream of Plant (Offsite) #Q02

• River Sample Downstream of Plant (Offsite) #QOI U West Branch of River (Onsite) #213

• Little Robbins Slough (Onsite) #212

• East Branch of Little Robbins Slough (Onsite) #211

• Ditch NE of Main Cooling Reservoir (Onsite) #229 Cl Main Cooling Reservoir Blowdown (Onsite) #237

• Main Cooling Reservoir (Onsite) #216 Figure 6-10 Historical Comparison of Tritium Activity in Shallow Aquifer Ground Water 1997 - 2005 30,000 picoCurtes per Kdlogran - Nuclear Regulatory Conunision Reporting Level 30000-2500(0- 20000 picoCuries per Kilogram - Environmental Protetion Agency Reporting Level

,. _/ _ _ _._

20000.

15000 //

§,10000-5000 0

1997 1998 1999 2000 2001 2002 2003 2104 2105 ETest Well B-3 directly south from MCR (onsite) #235

• Test Well B-4 Upper Aquifer (onsite) #251 Figure 6-11 STP Nuclear OperatingCompany 6-8

jaoX/IolO7qeal Co)wtrooment Mlyazera EC/25/H the almost twenty millirem a units in each of 16 sectors. The two miles west of the plant year everyone receives from ten sectors that have residents near FM 521 and the second naturally occurring radioactive within five miles and the distance is five miles southwest of potassium in the body. The to the nearest residence in each the plant. The Lower current reservoir concentration sector are listed below. Colorado River Authority is less than half of the reporting supplies the water for the level of the Nuclear Regulatory Nearest Resident fish ponds which is not Commission. Sector affected by the operation of IAprx Location l Some samples are collected and the STP power plants.

I__I analyzed in addition to those re- ENE ..4.5 11 Ryman Road I quired by our licensing documents ESE 3.5 Selkirk Island Quality Assuirance or internal procedures. These SE 3.5 Selkirk Island Quality assurance encompasses samples are obtained to give ad- SW 4.5 Citrus Grove planned and systematic actions to ditional assurance that the public WSW 2.5 FM 521 ensure that an item or fa .ility will and the environment are pro- W 4.5 FM 1095 perform satisfactorily. Reviews, tected from any adverse effects WNW 4.5 i Ashby - Buckeye Road surveillance and audits have de-from the plant. These samples NW 4.5 Mondrik Road termined that the programs, pro-include pasture grass, sediment NWN 3.5 Runnells Ranch cedures and personnel are samples, rain water, and water (FM 1468) adequate and do perform samples from various ditches and N 3.5 Runnells Ranch satisfactorily.

sloughs onsite, and air samples (FM 1468) Quality audits and indepen-near communities or other areas dent technical reviews help to of interest. The results of these determine areas that need analyses indicate that there is no The following items of interest attention and reevalual ion.

were noted during the census detectable radiological effect Areas that need attention are on theenvironmentbyplantoperation. addressed in accordance with the station's Corrective Action Land Use Census .t One resident was added in Program.

The Annual Land Use Census is the east north east sector on The measurement capabilities performed to determine if any Ryman Road.

of the Radiological Laboratory changes have occurred in the are demonstrated by t Colorado River water from location of residents and the use participating in inter-laboratory below the Bay City Dam has of the land within five miles of the measurement assurance not been used to irrigate South Texas Project generating programs. These programs crops.

units. The information is used to provide samples that are similar determine whether any changes in matrix and size to th se are needed in the Radiological 9 No commercial dairy measured for the Radiological Environmental Monitoring operates in Matagorda Environmental Monitoring Program. The census is County and there is no Program. Figure 6-12 performed by contacting area agricultural milk source summarizes the results of these residents and local government within the five-mile Zone.

intercomparison programs. In agencies that provide the in- addition, approximately ten formation. The results of the sur-  ; There were no identified percent of the analyses made are vey indicated that no changes commercial vegetable farms quality control samples that were required. located within the five-mile Zone. consist of duplicate, split and In addition, a survey is blind samples.

performed to verify the nearest Radiochemical measurements residents within five miles of the Two commercial fish farms must meet sensitivity require-South Texas Project generating continue to operate. One is 6-9 STP Nuclear OperatingCompany

20(1-5

?00(

2005 Radiological Laboratory Quality Assurance Program Performance 0-5% Difference 5-10% Difference 10-15% Difference 78 Total Analyses Figure 6-12 ments at the lower level of de- samples met the required lower tection for environmental levels of detection and the samples. These stringent re- thirteen samples are included in quirements were met in all but Table 3.

two samples taken in 2005.

1MS Program Deviations One measurement of direct Deviations from the sampling radiation was missed due to program must be acknowledged a lost dosimeter.

and explained in this report.

During 2005 the following sam-ples were not collected or were unacceptable for analysis:

Six out of thirty-six required broad leaf vegetation samples were not collected due to seasonal unavailability in January and February.

• Fifteen out of two hundred and sixty air samples were not continuously collected for the full time interval due to power failures. The power supply was updated and should improve reliability in Photo by: Judy Myers the future. All but two STP Nuclear Operating Company 6-10

• i7Za7iO/66'ecal 6 Cfl 2 ,Y2-zesn q ff;ufe1)m /

The minimum Radiological Environmental Monitoring Program is presented in Table 1.

The table is organized by exposure pathway. Specific requirements like location, sampling method, collection frequency, and analyses are given for each pathway.

TABLE 1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM EXPOSURE: DIRECT RADIATION 40 TOTAL SAMPLINO STATIONS Sample Media, Number. Approximate Location and Distance of Routine Sampling Sampling and Analysis Mininumrl Sample Stations frorm Containment. Mode Collection Type Analysis Frequency Frequency Exposure Media: TLD 16- Located in all 16 meteorological sectors, 0.2* to 4 miles. Continuously Quarterly Gamma dose Quarterly 16- Located in all 16 meteorological sectors, 2 to 7 miles.

6- Located in special interest areas (e.g. school, population centers), within 14 miles.

2- Control stations located in areas of minimal wind direction (WSW,ENE), 10- 16 miles.

• The inner ring of stations in the southern sectors are located within I mile because of the main cooling reservoir EXPOSURE: AIRBO RNF 5 TOTAL SAMPLING STATIONS Sample Media. Number. Approximate Location. and Distance of Routine Sampling Nominal Analysis Minimum Sample Stations from Containment. Mode Collection Type Analysis Frequency Frequency Charcoal and Parficulate Filters i- Located at the exclusion zone. N, NNW. NW Sectors. I mile. Continuous sampler Weekly or more Radeoiodine Weekl M operations frequently If Canister:

.1- Located in Bay City. 14 miles. required by dust 1-131 loading I- Control Station. lccated in a minimal wind direction (WSW). 10 Particulate miles. Samnlera Gross Beta Folloving filter Activity change Gamma- Quanerly Isotopic of composite (by location)

EXPOSUREt: WATF: RNF 2 TOTAL SAMPLING STATIONS Sample Media. Numner And Approximate Location of Sample Stations Routine Sampling Nominal Analysis Minimusm Mode Collection Type Analys a Frequency Freque icy Surface

.1- Located in MCR ax the MCR blowdown structure. Composite sample Monthly Gamma- Monthly Over a t month Isotopic

.1- Located above the site on the Colorado River not influenced by period (grab if not plant discharge (control). available) Tritium Quarte.tly Composite Located downstream from blow down entrance into the Colorado River.

Ground 1- Located at well down gradient in the shallow aquifer. Grab Quarterly Gamma- Quarterly Isotopic a Tritium 6-1 1 STP Nuclear OperatingCompany

9100<5WnO5 /r6)ujunewda1 /od TABILE 1 RADIOLOGICAL ENVIRONMENTAE MONITORING PROGRAM EXPOSURE: WATERRBORNE (CONTINUED)

Sample Media. Number And Approximate Location of Sample Stations Routine Sampling Nominal Analysis Minimum Mode Collection Type Analysis Frequency Frequency Drinkiny Wate I- Located on site. - Grab Monthly Gross Beta & Monthly Gamma-1- Located at a control station. Isotopic Tritium Quarterly SidimcnD Composites

.1- Located above the site on the Colorado River. not influenced by Grab Semi-annually Gamma- Semi-annually plant discharge. Isotopic 1.- Located downstream from blowdown entrance into the Colorado River.

I- Located in MCR.

No municipal water systems are affected by STP. This sample taken from deep aquifer supplying drinking water to employees while at work.

EXPOSURE: INGFSTION 2 TOTAL SAMPLING STATIONS Sample Media. Number And Approximate Location of Sample Stations Routine Sampling Nominal Analysis Minimum Mode Collection Type Analysis Frequency Frequency Milk Grab Semi-monthly Gamma- Semi-monthly

• when animals are Isotopic when animals are on pasture; and 1-131 on pasture; monthly at other monthly at other times, times.

Broadleaf Vegetation-.

2- Located at the exclusion zone. N. NW. or NNW sectors. Grab Monthly during Gamma- As collected growing season Isotopic I- Located in a minimal wind direction. (When available) and -131

• Limited source of sample in vicinity of the South Texas Project. (Attempts will be made to obtain samples when available.)

• - Three different kinds of broadleaf vegetation are to be collected over the growing season, not each collection period.

EXPOSURE INGESTION (CONTINUED)

Sample Media, Number And Approximate Location of Sample Routine Sampling Nominal Analysis Minimum Stations Mode Collection Type Analysis Frequency Frequency Fish and Invertebrates (edible portions) 1- Representing commercially or recreational important species Grab Sample scmi- Gamma- As collected in vicinity of STP that maybe influenced by plant operation. annually Isotopic on edible portions

- Same or analogous species in area not influenced by STP.

I- Same or analogous species in the MCR.

Gamma-Acricultural Products Grab At time of harvest Isotopic As collected Analysis in edible portion Domestic Meat Gamma-1- Represents domestic stock fed on crops grov.n cxclusivcly uilhin Grab Annually Isotopic As collected 10 miles of the plant.

• No sample stations have been identified in the vicinity of the site. Presently no agricultural land is irrigated by w atcr into ethich liquid plant wvastes svill bc discharged. Agricultural products xvill be considered if these conditions change.

STP Nuclear OperatingCompany 6-12

(l( 4 6w/qmA C I n Dma.',

Ial

- C I

=7 Table 2 Sample Media and Location Description AI AIRBORNE RADIOIODINE L5 CABBAGE AP AIRBORNE PARTICULATE L6 COLLARD GREENS BI RESIDENT DABBLER DUCK MI BEEF MEAT B2 RESIDENT DIVER DUCK M2 POULTRY MEAT B3 MIGRATORY DABBLER DUCK M3 WILD SWINE B4 MIGRATORY DIVER DUCK M4 DOMESTIC SWINE B5 GOOSE M6 GAME DEER B6 DOVE M7 ALLIGATOR B7 QUAIL Ms RABBIT B8 PIGEON OY OYSTER CC CRUSTACEAN CRAB SO SOIL CS CRUSTACEAN SHRIMP S ISEDIMENT - SHORELINE DR DIRECT RADIATION S2 SEDIMENT - BOTTOM F1 FISH - PISCIVOROUS VB LI, L2, L4, L5 or L6 F2 FISH - CRUSTACEAN & INSECT VP PASTURE GRASS

__FEEDERS F3 FISH - PLANKTIVORES & DETRITUS WD DRINKING WATER FEEDERS Li BANANA LEAVES WG GROUND WATER L2 CANA LEAVES WS SURFACE WATER L4 TURNIP GREENS WW RELIEF WELL WATER 6-13 STP Nuclear Operating Company

2 0 0f5 6 ~Pcrjaejdcd')a 5 ?ti fmo Table 2 Sample Media and Location Description MIEDIA CODE STATION VECTOR LOCATION DESCRIPTION CODE (Approxinmate)

DR Al AP V11 VP SO 001 I mile N FMI 521 DR 002 1 mile NNE FMI 521 DR 003 I mile NE FM 521 DR 004 1 mile ENE FNM 521 DR 005 1 mile E STP Visitor Center on FIM 521 DR Al AP SO 006 3.5 miles ESE Site near Reservoir Makeup Pumping Facility DR 007 3.5 miles SE XlCR Dike DR 008 0.25 mile SSE MCR Dike DR 009 0.25 mile S AICR Dike DR 010 0.25 mile SSW MCR Dike DR 011 0.5 mile SU MCR Dike DR 012 1.5 mile WSWS ICR Dike DR 013 1.5 mile WV FMI 521 DR 014 1.5 mile WNW FMI 521 DR Al AP N'B SO VP 015 I mile NW FIM 521 DR AI AP N'B SO VP 016 I mile NNW FM 521 DR 017 6.5 miles N Buckeye - FMI 1468 DR AI AP SO 018 5.5 miles NNE Celanese Plant - FMI 3057 DR 019 5.5 miles NE FMI 2668 DR 020 5 miles ENE FMI 2668 & FMI 2078 DR 021 5 miles E FNM 521& FMI 2668 DR 022 7 miles E Equistar Chemical Plant DR 023

• 16 miles ENE Intersection of FMI521 and FNM 2540 MCR-STP Main Cooling Reservoir STP-South Texas Project Media codes typed in bold satisfy collection requirements described in Table 1.

• Control Station STP Nuclear Operating Company 6-14

4,; .

Table 2 Sample Media and Location Description MEDIA CODE STATION VECTOR LOCATION DESCRIPTION CODE (Approximate)

DR 024 4 miles SSE MCR Dike DR 025 4 miles S MCR Dike DR 026 4 miles SSW MCR Dike DR 027 2.5 miles SW MCR Dike DR 028 5 miles WSW FM 1095 & Ellis Road DR SO 029 4.5 miles W FM 1095 DR 030 6 miles WNW Tres Palacios Oaks, FM 2853 DR 031 5.5 miles NW Wilson Creek Road DR 032 3.5 miles NNW FM 1468 DR AI AP SODRA AP 0 033 03 14 14 miles NNE Microwave ilesNNEBay City Tower at end of Kilowatt Road in DR 034 7.5 miles ENE Wadsworth Water Supply Pump Station DR Al AP SO 035 8.5 miles SSE Matagorda DR 036 9 miles WSW College Port DR Al AP VB VP SO 037* 10 miles WSW Palacios CP&L Substation DR 038 10.5 miles NW CP&L Substation on TX 71 near Blessing DR AI AP SO 039 9 miles NW TX 35 under High Voltage Power lines near DR A APSO 09 9mile NW Tidehaven High School DR 040 4.5 miles SW Citrus Grove DR 041 2.0 miles ESE MCR Dike DR 042 8.5 miles W FM 459 at Tidehaven Intermediate School DR 043 4.5 miles SE Site boundary at blowdown outlet WS 209 2 miles ESE Kelly Lake WD 210 On Site Approved drinking water supply from STP WS Sl 211 3.5 miles S Site, E. Branch Little Robbins Slough MCR-STP Main Cooling Reservoir STP-South Texas Project Media codes typed in bold satisfy collection requirements described in Table I.

• Control Station t rJ 6-15 STP Nuclear Operating Company

100C3 'W11H1 161ecal C111  ?

Table 2 Sample Media and Location Description MEDIA CODE STATION VECTOR LOCATION DESCRIPTION CODE (Approximate)

WS Si 212 4 miles S Little Robbins Slough WVS Si 213 4 miles SE West Branch Colorado River F (1,2, or 3) CC 214 2.5 miles SE MCR at Makeup WVater Discharge S2 215 0.5 mile SW NfCR at Circulating Water Discharge WVS S2 216 3.5 miles SSE MCR at blowdown stmncture F (1, 2, or 3) CC CS OY 222 >10 miles \West Matagorda Bay WS o2s West bank of Colorado River downstream of STP across from channel marker #22 NVD 228* 14 miles NNE Le Tulle Park public water supply Drainage ditch north of the reservoir that WS SI 229 2-3 miles ESE empties into Colorado River upstream of the reservoir makeup pumping facility S(l or 2) 230 3.5 miles ESE Colorado River at point vhere drainage ditch S~i r 2)230 .5 mles SE (229) empties into it S(l or 2) WS 233 4.5 miles SE Colorado River where MCR blowdown S(1 r 2 WS233 .5 ile SE discharge channel empties into it.

NVG 235 3.8 miles S WVell B-3 directly south from MCR B8 236 N/A STP Protected Area U'S 237 3.7 miles SSE Blowdown discharge channel from MCR S(l or2) WVS 242* >10 miles N Colorado River where it intersects Highway35 Colorado River upstream of Bay City Dam at II'S 243* >10 miles N the Lower Colorado River Authority pumping station WS 247 <1 mile E Essential Cooling Pond F(1,2, or3) 249* N/A Control sample purchased from a local retailer SO 250 0.75 miles NW' Sewage sludge land farming area WG 251 4.0 miles SSE Test U'ell B-4, upper aquifer F(1,2,or 3) CC S2 300 S STP Main Cooling Reservoir WW 701 4 miles S MCR Relief Well #f440 INS Q01 N/A Quarterly composite of station #227 and'or

______Q01_N/Aalternate #233 WS Q02 N/A Quarterly composite of station #243 and#or

___ _____ __ ___ ____ ___ alternate #242 MCR-STP Main Cooling Reservoir STP-South Texas Project Media codes typed in bold satisfy collection requirements described in Table I.

• Control Station STP Nutclear Operating Company 6-16

4-,,,y/na,@9.,.,l  ; 4'// aXk0o;'

2005 Radiological Environmental Monitoring Program Analysis Summary An analysis summary for all ofthe required samples is given in Table 3. The table has been formatted to resemble a United States Nuclear Regulatory Commission industry standard. Modifications have been made for the sole purpose of reading ease. Only positive values are given in this table.

Media type is printed at the top left of each table, and the units ofmeasurement are printed at the top right.

The first column lists the type ofradioactivity or specific radionuclide for which each sample was analyzed.

The second column gives the total number of analyses performed and the total number of non-routine analyses for each indicated nuclide. (A non-routine measurement is a sample whose measured activity is greater than the reporting levels forRadioactivity Concentrations in Environmental Samples.) The "LOWER LIMIT OF DETECTION" column lists the average minimum detectable activities achieved which were more sensitive than specified by the Nuclear Regulatory Commission.

A set of statistical parameters is listed for each radionuclide in the remaining columns. The parameters contain information from the indicator locations, the location having the highest annual mean, and infonna-tion from the control stations. Some sample types do not have control stations. When this is the case, "no samples" is listed in the control location column. For each ofthese groups of data, the following is calcu-lated:

The mean value ofpositive real values.

The number of positive real measurements / the total number of analyses.

The lowest and highest values for the analysis.

The data placed in the table are from the samples listed in Table 1. Additional thermoluminescent dosim-eters were utilized each quarter for quality purposes. The minimum number ofother analyses required by Table I were supplemented in 2005 by six surface water samples, two groundwater samples, two drinking water samples, four rainwater samples and two shoreline sediment sample. Fish, game and vegetation samples vary in number according to availability but also exceeded the minimum number required by Table 1.

Photo By: Judy 14yer 6-17 STP Nuclear Operating Company'

2005 C~1/2'cjre'nuentalPe/56ri TABLE 3 2005RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Direct Radiation Units: MilliRoentgen Standard Quarter ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHEST ANIUAL MEAN CONTROL LOCATIONS TYPE RNONROUTINE LIMIT OF MAN (0* LOCATION MEAN (t) MEAN (0' MEASUMENTS DETECTION RANGE INFOR.ATION RANGE RANGE Gamma 174 0 - 1.5E+01 ( 166' 166) 1 mile W 1.9E+01 ( 4/ 4) 1.6E+01 ( 8/ 8)

( 1.2E+01 - 2.0E+01 ) (e013) (1.7E+01 -2.0E+01) (1.4E+01 - I.SE+OI)

(0 Number of positive measurements / total measurements at specified locations.

TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Airborne Radioiodine Units: Pic Curies per Cubic Meter ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHEST ANNUAL MAN CONTROL LOCATIONS TYPE /NONROUTME LIMIT OF MEAN (0' LOCATION MEAN (0* MEAN (0*

MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE lodine-131 25S'0 9.4E-03 ( 0206) -(0/ 52)

' (0 Number of positive measurements I total measurements at specified locations.

TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Airborne Particulate Units: PicoCuries per Cubic Meter ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHEST ANNUAL EWAN CONTROL LOCATIONS TYPE fXONROUTINE LIMIT OF MAN (0* LOCATION MEAN (0* MEAN (0*

MEASUREEN'TS DETECTION RANGE INFORMATION RANGE RANGE Gross Bta 258'0 1.5E-03 2.3E-02 ( 205/206) 14 miles NNE 2.3E-02( 52/ 52) 2.3E.02 ( 52/ 52)

L(I.OE-02

- 5.4E-02) ('033) (I.OE 5.4E-02) (1. IE-02 5.2E-02)

Cesium-134 20!0 3.OE-04 - ( 0/16) - - - ( 0/ 4)

Cesium-137 20.0 2.6E-04 - ( 01 16) - - - ( 0/ 4)

Manganese-54 20! 0 3.OE-04 -( 0/ 16) - - -( 0/ 4 )

Iron-59 20!0 1.7E-03 - ( 01 16) - - - ( 0/ 4)

Cobalt-58 20.0 4.5E404 - ( 0/ 16) - - - ( 0/ 4 )

Cobalt-60 20!0 3.OE-04 - ( 0/ 16) - - - ( 0/ 4)

Zinc-65 2010 6.9E-04 - ( 0/ 16) - - - ( 0/ 4 )

Zirconium-95 20'0 8.4E-04 - ( 0/ 16) - - - ( 0/ 4 )

Niobium-95 20'0 8.2E-04 - ( 0/ 16) - - - ( 0/ 4 )

Lanthamum-140 20/0 5.4E-03 - ( 0/ 16) - - - ( 0/ 4)

Barium-140

• ( Numnber of positive measurements / total measurements at specified locations.

STP Ntuclear Operating Conmpany 6-18

7 )d;6/Y6

g6. ^wyroarnmemaie / evwja, a/oo, V

TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Surface Water Units: PicoCuries per Kilogram ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHiEST ANNUAL MEAN CONTROL LOCATIONS TYPE INONROUTINE UMITOF MEAN (0t LOCATION MEAN (0- MEAN (0' MEASUREMENTS DETECTION RANGE INFORMATION RANG E RANGE Ilvdroren-3 1210 2.6E+02 1.3E+04( 4/ 8) 3milesSSE 1.3E+04( 4/ 4) _ ( 0/ 4)

(1.2E+04 -1.4E+04) (#216) (1.2E+04 -1.4E+04) lodine-131 40 0 5.3E+00 - ( 0/ 27) -( 0/ 13)

Cesiur-134 40' 0 I.SE+00 - ( 0/ 27 ) - - ( 0/ 13)

Cesiurr-137 4010 1.6E400 - ( 0/ 27) - - ( 0/ 13) hlanganese-54 4010 1.6E+00 - ( 0/ 27) - - ( 0/ 13)

Iron-59 40.! 0 5.1E+00 - ( 0/ 27 ) - - -(0/ 13)

Cobalt-58 40/'0 1.7E+00 - ( 0/ 27 ) - -( 0/ 13)

CobalIt-60 4010 1.7E+00 - ( 0 27) - - ( 0/ 13)

Zinc-6' 4010 3.4E+O - ( 0/ 27 ) - - -( 0/ 13)

Zirconijm-95 40/0 3.IE+0O - ( 0/ 27) - - -( 0/ 13)

Niobium-95 40/0 2.IE+00 - ( 0/ 27) - - -( 0/ 13)

Lanthalium-140 4010 4.2E+00 - ( 0/ 27) - - -( 0/ 13)

I 1arium.140 _

'(f) Number of positive measurements / total measurements at spdcifed locations.

TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Drinking Water Units: PicoCuries per Kilogram ANisLYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITI1HIGI [EST ANNIUALMEAN CONTROL LOCATIONS TYPE INONROUTINE LIMIT OF MEAN (f) LOCATION MEAN (0- MEAN (0- I bMEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE i Gross Blca 26/0 I.8E+00 I.SE00 ( 12/ 13) 14 miles NNE 2.3E+00 ( 13 / 13) 2.3E00 ( 13/ 13) i (1.2E+00

• 3.0E+00) (#228) ( .4E+00 - 4.3E+00) (1.4E+00 - 4.3E+00) 4 lhvdrogen-3 8'0 2.6E+02 - ( 0/ 4) - - - ( 0/ 4) I Iodine-131 2610 3.2E+00 - ( 0/ 13) - - - ( 0/ 13) I Cesiun-134 26'0 2.OE+00 - ( 0 13) - - - ( 0/ 13) I Cesium 137 26'0 I.9E+0O - ( 0 / 13 ) - - - ( 0/ 13) I lstanganmse-54 26/0 1.8E+00 - ( 0/ 13 ) - - - ( 0/ 13 )

Iron-59 26'O 4.9E+0O - ( 01 13) _ ( 0/ 13)

Cobalt-!8 2610 I.8E+00 - ( 0/ 13) -( 0/ 13)

CobalkO 26t0 1.9E+00 - ( 0/ 13) -( 0/ 13)

Zinc-65 26/0 4.0E+00 - ( 0/ 13) -( 0/ 13)

Zirconium-95 26/0 3.3E+00 - ( 0/ 13) -( 0/ 13)

Niobiun-95 26S0 2.2E+00 - ( 0/ 13) . -( 0/ 13)

Lanthannm-140 26'0 3.1E+00 - ( 0/ 13) _ -( 0/ 13)

Iarium-140 .

• (8)Number oftpositive measurements / total measurements at specified locations.

6-19 STP Nuclear Operating Company

200O5 c6 mvi'6mewal Iff2/0ori TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Nednment-Nhorclinc ULits: PiCOCurics per Kilogram dlrN Awipift ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHEST ANNUAL MEAN CONTROL LOCATIONS TYPE /NONROUTI'NE LIMIT OF MEAN (f)' LOCATION MEAN (D)- MEAN (f)-

MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE Ccsium-134 6'0 2.4E+01 -( 0t 3) - - -( 0/ 3)

Cesium-137 6'0 I.9E+01 -( 0/ 3) - - - ( 0/ 3)

Nlangancsc-54 6'0 1.9E+01 -( 0/ 3) - - -( 0/ 3)

Iron-59 6'0 6.9E+01 -( 0/ 3) - -( 0/ 3)

Cobalt-58 6!0 1.9E+01 -( 0/ 3) - - -( 0/ 3)

Cobal-60 6'0 2.3E+01 -( 0/ 3) - - -( 0/ 3)

Zinc-65 6!0 4.7E+01 -( 0/3) -( 0/ 3)

Zirconium-95 6,'0 4.OE+01 -( 0/ 3) _ ( 0/ 3)

Niobium-95 6,'0 3.IE+01 -(0 3) _ (0/ 3)

Lanthanum-140 6 0 6.SE+01 - ( 0/ 3) _ ( 0/ 3)

Barium-140 (f) Number ol posilive measurements I total measurements at specified locations.

TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Ground Water (On site test wellJ I nits: PiwCmurie.s nwr Kilonrarm ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION UITII HIGHEST ANNUAL MEAN CONTROL LOCATIONS TYPE /NONROUTINE LIMIT OF MEAN (0)' LOCATION MEAN (0fb MEAN (f)

IMEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE lhldrogen-3 6'0 2.6E+02 1.2E+03( 6/ 6) 3.8 miles S 1.2E+03( 6/ 6) no samples 1L.0E403 - 1.6E+03) (0235) ( L.OE+03 - 1.6E+03)

Iodine-131 6' 0 5.3E+00 - ( 0 / 6) - - no samples Ccsium-134 6'0 1.9E+00 - ( 0/ 6) - - no samples Cesium-137 6! 0 1.8E+00 - ( 0/ 6) - - nosamples N13ngancse-54 6/0 1.7E+00 - ( 0/ 6) - - no samples Iron-59 6'0 5.4E+00 - ( 0/ 6) - - no samples Cobalt-58 6'0 1.8E+00 - ( 0/ 6) - - no samples Cobalt-60 6'0 1.7E+00 - ( 0/ 6) - - nosamples Zinc-65 60 3.6E+00 - ( 0/ 6) - - no samples Zirconium-95 6'0 3.2E+oo - ( 0 / 6) - - no samples Niobium-95 6'0 2.2E+oo - ( 0/ 6) - - no samples Lanthanum-140 6/0 4.1E+0O - ( 0/ 6) - - nosamples Barium-140 .

• (t) Number of positive measurements / Iotal measurements at specified locations.

STP Nuclear Operating Company 6-20

... ~4*~~iec-' 6 ~w'u-nwenla(/ lx~ §2 ea'q C, I TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Sediment-Bottom Units: PicoCurics Kilogram dry veight ANAMYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHEST ANNUAL MEAN CONTROL LOCATIONS TYPE /N'ONROUTINE LIMIT OF MEAN (0) LOCATION MEAN (0 MEAN (0' MEASUREMENTS DETECTION RANGE INFORIMATION RANGE RANGE Cesium-134 5/0 3.3E+01 - ( 01 5) no samples Cesium-137 5,'0 1.9E+01 7.8E+01( 4/ 5) 3milesSSE 8.JE+01( 3/ 3) nosamples (4.4E+01 - 1.0E+02) (#216) (4.4E+01 - 1.0E+02 )

hiangancse-54 510 2.5E+01 -( 01 5) nosamples Iron-59 5/0 7.1E+01 _ ( 01 5) no samples Cobalt-5? 5,'0 2.3E+01 -( 01 5) - no samples Cobalt-6) 5/0 2.3E+01 5.4E+01 ( 41 5) 3 miles SSE 6.IE+01 ( 2/ 3) no samples (2.4E+01 -7.4E+01 ) (#216) (4.8E401 -7.4E+01 Zinc-65 5;0 5.6E+01 - ( 01 5) - _ no samples Zirconiun-95 5/0 4.9E+01 - ( 0/ 5) - nosamplcs Niobium-95 5/0 3.7E+01 - ( 0/ 5 ) - no samples Lanthanim-140 5/0 6.2E+01 - ( 01 5) - _ nosamples Barium-140

• (I) Number of positive measurements / total measuremenls at specified locations.

TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Banana Leaves Units: PicoCuries xr Kilogram et%weight ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHEST ANNUAL MEAN CONTROL LOCATIONS IYPE /NONROUTINE LIMIT OF MEAN (0' LOCATION MEAN (0 MEAN (f)-

MEASUREEMENTS DETECTION RANGE INFORMATION RANGE RANG E lodinc-131 2V'0 1.2E+01 -( 0 15) - - - ( 01 7)

Cesium-134 2230 2.2E+oo -( 0/ 15) - - - O/ 7)

Cesiumr137 2230 1.9E+00 -( 0f 15) - - - ( 0/ 7) hiangaresc-54 22/0 2.tE+00 -( 0/ 15) - - - ( 0/ 7)

Iron-59 2320 9.8E+00 -( 0 15) - - - ( 01 7)

Cobalt-58 22'0 2.4E+00 -( 0/ 15) - - - ( 0/ 7)

Cobalt-S0 2Z'0 3.SE+0o -( 01 15) - - -( 0/ 7)

Zinc-65 22'0 6.5E+0o -( 0/ 15) - - - ( 0/ 7)

Zinconism.95 22'0 4.2E+00 -( 0 15-) - -( 0/ 7)

Niobium-95 22_0 2.9E+00 - ( 0/15) - - - ( 0/ 7)

Lanthaium-140 2210 4.8E+00 ( 0/ 15) - - - ( 01 7)

Barium-140

• (I) Number ofpositive measurements I total measurements at specified locations.

6-21 STP Nuclear Operating Company

,-.1009 ECLOY/,

TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Cana Leawes Units: PicoCuries per Kilogram net weight ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHEST ANNUAL MEAN CONTROL LOCATIONS TYPE INONROUTINE LIMITOF MEAN (f)- LOCATION MEAN (0- MEAN (f)-

MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE lodinc-131 6'0 I.0E401 -( 0/ 4) -( 0/ 2)

Ccsium-134 6/0 2.9E+00 -( 0/ 4) -( 0/ 2)

Cesium-137 610 2.5E+00 -( 0 t 4) -( 0/ 2)

Nlangancsc-54 6/0 2.7E+00 -( 0/ 4) l -( 0/ 2)

Iron-59 6'0 1.2E+01 -( 0/ 4) . -( 0/ 2)

CobaII-58 6/0 3.0E+00 -( 0/ 4) -( 0/ 2)

CobalI-60 6/0 4.6E+00 -( 0/ 4) -(0/ 2)

Zinc65 610 8.4E+00 -( 0/ 4) -( 0/ 2)

Zirconium-95 6/0 5.3E+00 -( 0/ 4) _ ( 0/ 2)

Niobium-95 6/0 3.6E+00 -( 0/ 4) _ _ _ ( 0/ 2)

Lanthanum-140 6/0 4.9E+00 -( 0/ 4) -( 0/ 2)

Barium-140 I (f) Number of psitie measurements / total measurements at specified locations.

TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Collard Greens Units: PicoCuries per Kilogram wet veight ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHEST ANNUAL MEAN CONTROL LOCATIONS TYPE ,NONROUTINE LIMIT OF MEAN (O' LOCATION MEAN (t)- MEAN (t)-

MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE Iodinc-131 3.0 3.5E+00 -( 0/ 2) - - 0/ 1)

Ccsium-134 3'0 2.OE+00 - ( 0/ 2) - - - 0/ 1)

Ccsium-137 30 1.7E+00 -( 0/ 2) - - -( 0/ 1)

Manganesc-54 3 '0 1.9E+00 -( 0/ 2) - - -( 0/ 1)

Irom-59 3!0 7.5E+00 -( 0/2) 2-(0/ I)

Cobalt-58 3!0 2.OE+00 -( 0/ 2) _ ( 0/ 1)

CobaI-60 310 3.2E+00 -( 0/ 2) -(0/ 1)

Zinc-65 3!0 5.8E+00 -( 0/ 2) _ (0/ )

Zirconium-95 3Y0 3.4E+00 -( 0/2) 2 -( 0/ )

Niobium-95 3' 0 2.1E+00 -(0/2) 2 ( 0/ )

Lanthanum-140 3'0 2.IE+00 -( 0/ 2) _ _ -( 0/ 1)

Barium-140

• (f) Number ofposifivc mcasurcmcnts / total measurements at spccified locations.

STP Nuclear Operating Company 6-22

gr. 5 /6../64;e~(i.Z/w6V z~tal _/0erY/;.'q7' X</)r_

C, TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Fish - Piseivorous Units: PicoCuries er Kilogram wet iiEight ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHEST ANNUAL MEAN CONTROL LOCATIONS TYPE /NONROUTINE LIMIT OF MEAN (t) LOCATION MEAN (I)- MEAN (f

_ _ tMEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE Cesium-134 7/0 3.5EOI -( 0/ 5) _ _ -( 0t 2)

Cesium-137 7/0 3.2E+01 - ( 0/ 5) _ ( 0/ 2)

Manganesc-54 7/0 3.IE+01 - ( 0/ 5) -- ( 0/ 2)

Iron-59 7/0 8.9E+01 -( 0/ 5) _ _ _ ( 0/ 2)

Cobalt-58 7/0 3.IE+01 - ( 0/ 5) -( 0/ 2)

Cobalt-60 7/0 3.6E401 -( 0/ 5) -( 0/ 2)

Zinc4'6 7/0 6.9E+01 -( 0/ 5) _ ( o/ 2)

Zirconism-95 7/0 5.7E+01 -( 0/ 5) _ ( 0/ 2)

Niobimn-95 7/0 3.5E+01 -( 0/ 5) -( 0/ 2)

Lanthamum-140 710 5.4E+01 - O(/ 5) -( 0/ 2)

B3aium-140

• (I) Number of positive measurements / totl measuremenls aI specified locations.

TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS SUMMIARY Medium: Crustacean Shrimp Units: PicoCuries per Kilogram wvet weight AN34LYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHESTANNUAL MEAN CONTROL LOCATIONS

'YPE /NONROUTINE LIMIT OF MEAN (I) LOCATION MEAN (t) tMEAN(f) sASU!RFAIENTS

_ DETFeCION RANGE INFORMATION RANGE RANGE Cesium-134 610 3.3E+01 -( 0/ 4) ( 01 Of 2)

Cesium-137 6/0 3.0E401 -( 0/ 4) -( 0/ 2)

Mangancse.54 610 3.1E+01 -( 0/ 4) -( 0/ 2)

Ikon-59 610 S.5E+01 -( 0/ 4) _ ( 0/ 2)

Cobalt-58 610 2.SE+OI -( 0/ 4) _ _ - ( 0/ 2)

Cobahl-60 6/0 3.4E+01 -( 0 4) _ ( / 2)

Zinc-6 4 610 6.7E+01 -( 04) -( 0/ 2)

Zirconiham-95 6/0 5.3E+01 -( 0/ 4) -( 0/ 2)

Niobiutn-95 610 3.2E+01 -( 0/ 4) -( 0/ 2)

Lanthanum-140 610 4.9E+01 -( 0/ 4) _ _ -( 0/ 2)

Jariurr-140 I

• (I) Number of positive measurements / total measurements at specified locations.

6-23 STP Nuclear Operating Company

,-1006 ff-/l- 1, TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Fish - Crustacean & Insect Fccders Units: PicoCuries per Kilogram %%et weight ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITI IIIGIIEST ANNUAL MEAN CONTROL LOCATIONS TYPE tNONROUTINE LIMIT OF MEAN (f)0 LOCATION MEAN (f)t MEAN (0Y bMEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE Ccsium-134 610 2.9E+01 - ( 0/ 6) - nosamples Cesium-137 6'0 2.6E+01 - ( 0/ 6) - - nosamples Nlangancsc-54 6'0 2.6E+01 - ( 01 6) - - no samples Iron-59 6'0 S.4E+01 - ( 01 6) - - no samples Coball-S8 6'0 2.7E+01 - ( 0t 6) - - nosampIcs Cobal-60 6/0 3.3E+01 - ( 0 1 6) - - nosamples Zinc-65 6/0 6.OE+01 - ( 0 6) - - nosamples Zirronium-95 6,'0 4.9E+01 - ( 0/ 6) - - nosamples Niobium-95 6/0 3.IE+01 - ( 0/ 6) - - nosamples LantlUnum-140 610 5.4E+01 - ( 0/ 6 ) - - no samples

• (f) Number ofpositivc mcasuremcnts / total mcasuremcnts at specified locations.

TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Beef Meat Units: PicoCuries per Kilogram weCt Nwight ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITII IIIGIIEST ANNUAL MEAN CONTROL LOCATIONS TYPE /NONROUTINE LIMIT OF MEAN (0' LOCATION MEAN (f)' MEAN (tj-

_MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE Cesium-134 2'0 1.3E+01 - ( 0/ 2) - - nosamples Cesium-137 210 1.2E+01 - ( 01 2) - nosamples Nangancsc-54 Z'0 1.2E+01 - ( 0/ 2) - - nosamples Iron-59 2! 0 6.SE+01 - ( 0/ 2) - - no samples Coball-58 210 1.7E+01 - ( 0 / 2) - - no samples Coball-60 Z'0 1.4E+01 - ( 0/ 2) - - no samples Zinc-65 2/0 3.0E+01 - ( 01 2) - - nosampIcs Zirconium-95 2/0 3.2E+01 - ( 0/ 2) - - no sampICs Niobium-95 2t 0 3.0E+01 - ( 0/ 2) - - no samples Lanllunum-140 2!0 2.2E+02 - ( 01 2) - - nosampICs Barium-140 .-

~m,cr

• 1 Numbcr ofus".posuv

- ti)

_esrinss in i..u... ni /1 spcie lu......I Ai ..e;r 0.A11 iuNc measurements I towl mcasumncms at sp"ibcd lut;atiuns.

IP STP Nuclear Operating Company 6-24

g.?,/0,q/cie-iieaiGZ; wn am Ia! c8K2OXe I I c-, (1 TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Mediumi: Rain Water Units: PicoCurics per Kilorram ANA.YSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS i[EST ANNUAL MEAN LOCATIONN%1T I llHG CONTROL LOCATIONS TYPE /NONROUTINE LIMIT OF MEAN (t LOCATION MEAN (D- MEAN (I)'

MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE l1vdrogeii-3 4 0 2.6E402 - ( 0/ 4) _ - nosamples lodinc-1.11 4 0 5.SE+00 - ( 0 / 4 - nosamplos Cesium-134 4.'0 1.7E+OO -( 0/ 4) - nosamples Cesium-137 4, 0 1.6E400 - ( 0/ 4 - no samples Mangan:se-54 4 0 1.6E400 - ( 0/ 4) _ - no samples Iron-59 4'0 4.SE+00 - ( 0/ 4 ) - - nosamples Cobalt-58 4 0 1.6EsOO - ( 0/ 4) - - no samples Cobalt-iO 4 0 1.6E+00 - ( 0/ 4 ) - - no samples Zinc-65 4'0 3.2E+o0 - ( 0/ 4) - - nosampiles Zirconu'm-95 4 0 2.9E+00 - ( / 4) - - nosamples Niobiumn-95 4 0 2.0E40o - ( 0 1 4) - - no samples Lanthanum-140 4 0 4.IE+00 - ( 0/ 4) - - nosamples Barium-140

• (f) Numcbr ofposilisc measurments /ltotal Ceasuremcnts at specified localions.

TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Cntstaeean Crab Units: PicoCuries per Kirlogram net eiglt ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HitGltEST ANNUAL MEAN CONTROL LOCATIONS TYPE /NONROUTINE LIMITOF MEAN (f) LOCATION MEAN (0)t MEAN (f)-

tlEASURIJR FNTS DETFCrTION RANCE INFORMATION RANGE RANGE Cesiuri-134 2 0 2.SE+01 -( 0/ 2) no samples Cesiuri-137 2/ 0 2.6E+01 _ ( 0/ 2) - - nosampIcs Mang:.nesc-54 20 2.5E401 _ ( 0/ 2) _ - nosamples Iron-5) 2'0 7.5E+01 _ ( 0/ 2) - - no samples Cobal -5'0 2.6E401 -( 0/ 2) - - no samples Cobal:-60 2Z0 2.9E+01 _ ( 0/ 2) - - nosamptes Zinc-65 Z'0 5.6E+01 _ ( 0/ 2) - - nosamples Zirmolium-95 Z0 4.2E+01 - ( 0/ 2) - - no samples Niobium-95 2 0 2.9E+01 _ ( 0/ 2) - - nosamples Unttanum-140 2'0 4.SE+01 _ ( 0/ 2) - - nosamples Ianem-140

• (f) Number of posilive mcasuremcnts / totaI measurements at specified locations.

6-25 STP Nuclear Operating Company

2006 ore&0Yl TABLE 3 2005 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Wild Sixine Units: PicoCuries per Kilogram met .wight ANALYSIS TOTAL A.NALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHEST ANNUAL MEAN CONTROL LOCATIONS TYPE NONROUTINE LIMIT OF MEAN (f) LOCATION MEAN (t- MEAN (0)

MEASUREMENTS DETECTION RANGE INFORMATION RANG E RANGE Cesium-134 2V0 3.OE+01 - ( 0/ 2) _ - no samples Cesium-137 20 2.8E+01 - ( 0/ 2) - - nosampes Nianginese.54 2'0 2.SE+01 - ( 0/ 2 ) - - nosampls Iron-59 2/ 0 S.2E+01 - ( 0/ 2 ) - - no samples Cobalt-5S 20 2.7E+01 - ( 0/ 2 ) - - no samples CobaltI60 210 3.2E+01 - ( 0/ 2) - - nosampies Zinc-65 2/ 0 6.4E+01 - ( 0/ 2) - - no samples Zirconium-95 2/0 4.5E+01 - ( 0/ 2 ) - - no samples Niobium-95 2 0 2.9E+01 - ( 0 / 2) no sampIes Lanthanum-140 2/ 0 4.6E+01 _ C 0/ 2) _ _ no samples G3arum-140 I

• (I) Number of positive measuremenls / total measurements at specified locations.

STP Nuclear Operating Company 6-26