Text

2004 Annual Environmental and Annual Radiological Environmental Operating Reports
	ML051260127
Person / Time
Site:	South Texas
Issue date:	04/28/2005
From:	Bullard W; South Texas
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	NOC-AE-05001881, STI: 31878659
	Download: ML051260127 (57)
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April 28, 2005 NOC-AE-05001881 10CFR50.36b STI: 31878659 U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852 South Texas Project Units 1 and 2 Docket Nos. STN 50-498, STN 50-499 2004 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 2004 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:

2004 Annual Environmental and Annual Radiological Environmental Operating Reports.

NOC-AE-05001881 Page 2 4

cc:

(paper copy) (electronic copy)

Bruce S. Mallett A. H. Gutterman, Esquire Regional Administrator, Region IV Morgan, Lewis & Bockius LLP U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 David H. Jaffe Arlington, Texas 76011-8064 U. S. Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission Jack A. Fusco Attention: Document Control Desk Michael A. Reed One White Flint North Texas Genco, LP 11555 Rockville Pike Rockville, MD 20852 C. A. Johnson AEP Texas Central Company Richard A. Ratliff C. Kirksey Bureau of Radiation Control City of Austin Texas Department of State Health Services 1100 West 49th Street Jon C. Wood Austin, TX 78756-3189 Cox Smith Matthews Jeffrey Cruz 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. Canady City of Austin Electric Utility Department 721 Barton Springs Road Austin, TX 78704

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

NPF-76 & NPF-80 April 2005 Authored by:

/tvarrell Sherwood, Ph.D.

Supervisor Health Physics Division and Peg fton T.vis, J.-CM Staff Consultant Chemistry Division Technical Review:

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

William T. BuIjdrcfHP Manager Health Physics Division 2004 Annual Environmental Operating Report SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION

Table- of Contents Page Executive Summary ............................................... 1-1 Site and Area Description ............................................... 2-1 Non-Radiological Environmental Introduction and Summary ................................................ 3-1 Non-Radiological Environmental Operating Report ................ ................................ 4-1 14 Environmental Conditions o Aquatic and Ecological Monitoring ................................................ 4-1 o Water Quality Management ............................................... 4-3 O AirQualityManagement ............................................... 4-5 O Non-Radioactive Waste Management ................................................ 4-7 O Chemical Control and Management ............................................... 4-9 1 Environmental Protection Plan Status ............................................... 4-9 Radiological Environmental Introduction and Summary ................... ............................ 5-1 Radiological Environmental Operating Report ............................................... 6-1 O Program Description ................................................ 6-1 o Analysis of Results and Trends ............................................... 6-1 O Land Use Census ................................................ 6-10 O QualityAssurance ............................................... 6-12 o Program Deviation ............................................... 6-12 List of Tables X Table 1: Radiological Environmental Monitoring Program .............................................. 6-13 W Table 2: Sample Media and Location Descriptions .............................. ............... 6-15 W Table 3: 2004 Radiological Environmental Monitoring Program Analysis Summary .............................................. 6-19 STP Nuclear Operating Company

2004 Environmental Report List of Figures Page Figure 4-1: 2004 Nonradioactive Waste Management ............... ..................... 4-7 Figure 4-2: 2004 Nonradioactive Waste Generation ............. ....................... 4-8 Figure 4-3: Hazardous WVaste Generation Historical Comparison .4-9 Figure 6-1: Radiological Environmental Monitoring Program Designated Sample Location Map (Off Site) .6-2 Figure 6-2: Radiological Environmental Monitoring Program Designated Sample Location Map (On Site) .6-3 Figure 6-3: Radiological Environmental Monitoring Program Zone Location Map .6-4 Figure 6-4: Historical Comparison of Average Quarterly BetaActivity .6-5 Figure6-5: Environmental DosimeterComparisons .6-6 Figure 6-6: Historical Comparison of Cobalt-58 and Cobalt-60 in Main Cooling Reservoir Sediment .6-7 Figure 6-7: Calculated Cumulative Curies of Cobalt-60 in the Main Cooling Reservoir .6-8 Figure 6-8: Historical Comparison ofTritium Added to and Remaining in the Main Cooling Reservoir .6-8 Figure 6-9: Historical Comparison of Thtium Activity in Surface Water .6-9 Figure 6-10: 2004 Radiological Laboratory Quality Assurance Program Performance .6-11 STlNuc,,;lcm- Opcr,-;timlts ('on

&xe~tt~v~ ~uhnuy Executive Summary fThrport describes the environ-Q~mental monitoring programs, radio-logical and non-radiological, con-t de tted at the South Texas Project during 2004. Included in this re-port are the Environmental Protec-tion Plan Status, the results of the Radiological Environmental Moni-toring Program and the Land Use Census.

Radiation and radioactivity in the environment are constantly moni- Photo By: Barbara Carnley tored within a 15-mile radius of the South Texas Project. Sampling lo- mine if changes in radioactivity levels are attributable to station operations cations are selected using weather, or other causes such as previous nuclear weapons testing programs and land use and water use information. natural variations.

Two types ofsampling locations are used. The first type, control stations, Radioactivity levels in the South Texas Project's environment frequently are located in areas that are beyond fall below the minimum detection capabilities ofthe state-of-the-art scien-measurable influence of the South tificinstruments. Samples withradiationlevelsthatcannotbedetected are Texas Project or any other nuclear below the Lower Limits ofDetection. The United States Nuclear Regu-facility. The sample results from latory Conmmission requires that equipment used forradiological monitor-these stations are used to explain ing must be able to detect specified minimum limits for certain types of radiation from sources other than the samples. This ensures thatradiation measurements are sufficiently sensi-SouthTexasProject. Indicatorsta- tive to detect small changes in the environment. TheUnited States Nuclear tions are the second type of stations. Regulatory Commission also has a required "reporting level." Licensed The samples from these stations nuclear facilities must prepare a special report and increase their sampling measure any radiation contributed if any measured radiation level is equal to or greater than this reporting to the environment by the project. level. No sample from the South Texas Project has ever reached or Indicator stations are located in ar- exceeded a reporting level.

eas close to the South Texas Project where any plant releases would be at the highest concentration.

Priorto initial operation ofthe South Texas Project, samples were col-lected and analyzed to determine the amount of radioactivity present in the area. These results are used as a "pre-operational baseline."

Results from the indicator stations are compared to both current con-trol sample results and the pre-op-erational baseline values to deter-STP Nuclear Operating Conmpany 1.1

2004 Environmental Report Measurements made are divided into four categories orpathways based upon how the results may affect the public. Airborne, waterborne, ingestion and direct radiation are the four pathways that are sampled. Each

/pathwais described below.

The airborne pathway is sampled in areas around the South Texas Project by measuring radioactivity of iodine cannisters and particulate air filters. The 2004 airborne results were similar to pre-operational levels with only naturally occurring radioactive material unrelated to the operation of the South Texas Project detected.

,1t 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 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. The average tritium level in the Main Cooling Reservoir remained similar to past years and remained below United States NuclearRegulatory 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 because less Cobalt-60 has been added to the reservoirby plant effluents than has undergone radioactive decay.

rt 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.

The direct exposure pathway measures environmental radiation doses using thermoluminescent 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 forpeople living in the area is maintained atless than one millirem peryear. Environmental programs at the site monitor known and pre-dictable relationships between the operation of the South Texas Projecti 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 regu-lations and guidelines. These pro-gramns are verified by the state of Texas through collection and analy-sis of samples and placement of the .4_

state's thermolumninescent dosim-eters. Photo By: Gwenna Kelton STP Nuclear Operating Company 1-2

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Site and Area Description The South Texas Project is a low-power testing license on December 16, 1988, obtained initial located on 12,220 acres in criticality on March 12, 1989, and was declared commercially opera-Matagorda County, Texas, tional on June 19, 1989. Both units together produce enough electricity approximately 15 miles southwest to serve over a million homes as well as serving as the largest employer of Bay City along the west bank and source of revenue for Matagorda County.

of the Colorado River. The South Texas Project wasjointly owned How the South Texas Project Works by Texas Genco LP, AEP Texas Central Company, the City of Fossil-fueled and nuclear-powered steam generating plants operate on Austin and the City of San the same principle. Fuel is used to produce heat to convert water into Antonio in 2004. Until late 1997, high-pressure steam. The steam is directed through a turbine to turn a the Houston Lighting & Power generator. In a fossil fuel plant, burning coal, lignite, oil or natural gas in Company was the designated a boiler produces the heat. In a nuclear plant, the reactor replaces the Project Manager for the owners. boiler and the "fissioning" or splitting of uranium atoms inside the reactor In November of 1997, the STP produces the heat.

Nuclear Operating Company assumed operational control of the The fuel for a nuclear reactor is uranium. It is formed into cylindrical South Texas Project and ceramic pellets, each about the size of the end of your little finger. One responsibility for implementation pellet has the energy potential of about a ton of coal. Millions of these of all environmental programs. pellets are stacked in fuel rods that are arranged into assemblies that make up the core of the reactor. The use of uranium allows us to The South Texas Project has two conserve natural gas, oil and coal and to avoid the associated produc-1,250 megawatt-electric Westing- tion of greenhouse gases.

house pressurized water reactors.

Unit 1 received a low-power A reactor starts operating when control rods in the core are withdrawn testing license onAugust 21, and fission begins. The fuel rods heat water circulating in sealed, 1987, obtained initial criticality on stainless steel piping that passes through large heat exchangers called March 8,1988, and was declared steam generators. The water in the reactor is pressurized to prevent commercially operational on boiling. This is why the South Texas Project's reactors are called August25,1988. Unit2received "pressurized water reactors."

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2004 Environmental Report This hot, pressurized water heats a oxide from entering the earth's pond. Many smaller bodies of separate supply of water in the atmosphere. Nuclear power water onsite include wetlands, steam generators to produce plants were responsible for Kelly Lake, drainage ditches, steam that is directed through the nearly half of the total voluntary sloughs and depressions. Much blades ofa turbine generator to greenhouse gas emissions of the land east of the cooling produce electricity. The steam is reductions reported by U.S. reservoir is leased for cattle then fed to a condenser where a companies in 2001. Additional grazing. Approximately 1,700 separate supply ofcooling water information on nuclear energy acres remain in a more natural from the reservoir turns it back and the environment can be state as a lowland habitat. A 110-into water that is then pumped found on the website maintained acre wetland habitat area was back to the steam generator for by the Nuclear Energy Institute established in 1996 on previously reuse. A diagram of the plant at http://www.nei.org unused land located northeast of water systems is shown on the the power plants. The area previous page. surrounding the South Texas The Site Project is characterized by coastal In addition to its safety systems, plain with farmland and pasture the South Texas Project has many Sixty-five of the entire 12,220 predominating. Local relief of the built-in physical barriers that acres at the South Texas Project area is characterized by flat land, would prevent the release of are occupied by the two power approximately 23 feet above sea radioactive materials in the unlikely plants. Plant facilities include a level.

event of an accident. The most 7,000-acre main cooling reservoir visible ones are the 200-foot-tall, and a 47-acre essential cooling domed containment buildings with steel-reinforced walls four feet thick. Inside each of these 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 0iKE-116", ' lid 74 inside it are sheathed in hardened metal tubes.

Nuclear energy has one of the lowest impacts on the environ-ment. It's the most eco-efficient energy source because it pro-duces the most electricity in relation to its minimal environ-mental impact. In 2003, nuclear generation in the United States prevented 679.8 million metric tons of carbon dioxide, 3.36 million tons of sulfur dioxide and Photo By: Barbara Carnley 1.24 million tons of nitrogen STP Nuclear Operating Company 6 2-2 rOOZD

Site and Area Description The Area The economic base for this area primarily isagricultural related. Most of the land near the site isused for the production of five major agricultural products: beef, rice, grain sorghum, soybeans and cotton. Inaddition to the agriculture industry, there iscommercial fishing inthe lower Colorado River, East and West Matagorda Bays, Intracoastal Waterway and the Gulf of Mexico. Currently shrimp, oysters, crab and fin fishes such as catfish and striped bass are the predominant com-mercial fish inthe county. Aquaculture farms con-tinue to be developed in the area with the main crop - _

being catfish.

Although the surrounding area isheavily cultivated, significant amounts of woodlands, thicket, brush, fields, marsh and open water exist to support wildlife. The area lies inthe southern region of the central flyway and ishost to an abundance of migratory birds. The local estuary environments provide the necessary habitat for a variety of fish types to complete their life cycles. The area also Photo BY: Barbara Carniley affords opportunity for recreational hunting and fishing.

The South Texas Project ishome to many species of animals. Inhabitants include American alligators, ospreys, bald eagles and several hundred deer. In winter, literally hundreds of thousands of waterfowl, principally migratory geese as well as white pelicans and the common tern, have found that the plant's 7,000-acre cooling reservoir provides a good resting place during their migrations. The station also established a man-made wetland habitat in 1996 that attracts an increasing diversity of migratory fowl and other wildlife.

Since 1997, the 15-mile-wide area that includes the South Texas Project has had the highest number of bird species nationwide inthe National Audubon Society's annual Christnas Bird Count.

The climate of the region is subtropical maritime, with continental influence. Itis characterized by short, mild winters and long, hot and humid summers. Rainfall isusually abundant throughout the year with an annual average of approximately forty-two inches.

The prevailing wind direction is from the south-southeast, shiffing -

to north-northeast for short P'hioto Bi: Gite'lnlna Kelton intervals during the winter months.

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Non-Radiological Environmental Introduction and Summary e eSouthTexas Project is

.ommitted to the production of electricity in a safe, reliable, and Q-46economical manner using nu-clear energy. The station's programs, policies and business plan objectives also incorporate a commitment to environmental excellence and sound environ-mental management. The dedication of station personnel who develop, implement and monitor site environmental protection programs and compli-ance exemplify this commitment.

The station's commitment to-sound environmental management is illustrated by the following environ- Everyone has a responsibility to our daily operational and business protect the environment. Com- decisions. The people at the mental successes in 2004:

mitment to environmental respon- South Texas Project understand sibility is an integral component of the need to balance economic, t Continued classification as a the South Texas Project operat- operational and environmental is-high performer by the Texas ing policy. This responsibility sues for the benefit of the station Commission on Environmental reaches further than mere compli- and the public. The South Texas Quality based on the ance with laws and regulations to Project understands that we must station's above-average encompass the integration of hold ourselves to the highest prin-environmental compliance sound environmental practices into ciples of responsibility for our en-record in all areas consid-vironmental and station activities.

ered, including water quality, waste management and air quality compliance lt~ Station involvement in community efforts to increase public safety awareness, collect hazard-ous and non-hazardous waste for proper disposal and responsibly manage regional water resources.

Re-classification as a small-quantity generator based on the station's successful reduction of annual hazard-ous waste generation. Photo By: Gwenna Kelfon STP Nuclear Operating Company 1 C9414 3-1

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Non-Radiological Environmental Operating Report 4/ EnmPironmental Conditions This section of the report goals, maintaining and improving facility's compliance history.

desdribes the South Texas internal programs and continuing The state's classification of the Project's non-radiological community environmental South Texas Project as a high environmental program perfor- outreach programs and projects. performer was based on the mance and environmental In 2004, South Texas Project station's environmental perfor-conditions from January 1 co-sponsored and participated mance over the last five year through December 31, 2004. in the Matagorda County period.

The STP Nuclear Operating Partners in Safety Conference Company environmental staff and the Matagorda County AQUATICANDECO-closely monitors environmental Household Hazardous Waste LOGICAL MONITORING conditions and performance at Collection day. The station also the South Texas Project. Texas supported various bird counts The location of the South Genco LP provides support and and surveys sponsored by Texas Project falls within the technical assistance to the South federal and state agencies and Texas Land Resource Area Texas Project. In 2004, the volunteer organizations such as designation as coastal prairie Texas Commission on Environ- the annual Audubon Christmas and can be divided into two mental Quality conducted Bird Count, the Great Texas broad ecological areas based on compliance inspections for Birding Classic and Colonial topography, soils and vegetation.

onsite beneficial land application Waterbird Survey. The bottomland area is a and potable water system swampy, marshy area that I

operations at the station with no The Texas Commission on occupies approximately 1,700 violations issued. Environmental Quality classified acres of the site near the Colo-the South Texas Project as a rado River. This area provides In 2002, the South Texas high performer in 2004 based on an important habitat for birds Project applied for recognition the station's above-average and other wildlife. A spoil as a partner in the CLEAN environmental compliance impoundment constructed in TEXAS program administered record. Facilities, such as the 1972 by the United States Army by the Texas Commission on South Texas Project, are classi- Corps of Engineers is included in Environmental Quality. The fied by the state as a high this area. In addition, a 110-state subsequently granted performer, average performer or acre wetland habitat area that approval of the station's applica- poor performerbased on that attracts a variety of bird groups tion. CLEAN TEXAS is a voluntary environmental leader-ship program comprised of industries, nonprofit groups, counties and other organizations 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 4 STP Nuclear Operating Company C%PW4 4-1

2004 Environmental Report United States Department of remote parking lot at the station.

Agriculture Conservation Award Special precautions were taken in 1999 for habitat preservation. to protect the nesting area and a This habitat area immediately small, but growing population of attracted a variety of bird both species has continued to species and other wildlife and return each year to the site.

has continued to support an Intensive bird nesting continues increasing diversity of plants and throughout the lowland habitat, animals. particularly in a heron rookery around the perimeter of Kelly The South Texas Project is Lake. U. S. Fish and Wildlife Photo By: Gwenna Kelton located on the state-sponsored Service biologists estimate that Great Texas Coastal Birding approximately one-third of Trail that spans the entire Texas Texas' breeding adult Gull-billed and other wildlife was estab- Gulf Coast from Brownsville to Tern population, considered to lished in 1996 on previously the Louisiana border. Several be in decline, nest on the internal unused land located northeast of bird species listed on the state dikes of the Main Cooling the power plants. The remaining and federal threatened or Reservoir at the South Texas area of the site offers diverse endangered species lists have Project.

habitats for mammals and been observed at the wetland several types of birds. The habitat and elsewhere onsite. The South Texas Project South Texas Project environ- These include a nesting pair of continues to monitor important mental staff regularly monitor the bald eagles, peregrine falcon, wildlife species to detect popu-site's environs for changing wood stork, white-faced ibis lation changes. Informal obser-conditions. Ecological condi- and white-tailed hawk. Addi- vations by station and Texas tional migratory and resident Genco LP personnel continue to tions onsite in 2004 remained generally unchanged and satis- bird species such as a variety of indicate that the site provides factory. ducks, geese, turkey and high-quality habitat in which a pheasant have been observed wide range of animals live. The In 1996, the South Texas during informal surveys of the site continues to attract extensive Project and Houston Industries site's diverse natural and man- wildlife populations, offering a Incorporated initiated ajoint made habitats. refuge for resident species as effort with Ducks Unlimited, well as seasonal migrants. The Texas Parks and Wildlife, the The South Texas Project lowland habitat located between United States Fish and Wildlife continues to provide vital habitat the Colorado River and the east Service, and the United States for more than 125 different bank of the Main Cooling Department of Agriculture species of wintering and resident Reservoir offers a significant Natural Resources Conservation birds, including the common tern source of water year-round.

Service to establish a 110-acre and white pelicans. A record These natural resource areas, in wetland habitat for migratory 144 species were sited during concert with numerous addi-waterfowl at the station. The the last annual Christmas Bird tional wetland and grassland wetland project received the Count conducted at the South areas, offer the key ingredients Ducks Unlimited Habitat Con- Texas Project. In 1998, a small necessary to sustain the exten-servation Award in 1996 and a number of black skimmers and sive wildlife population at the least tems established nests on a South Texas Project.

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Non-Radiological Environmental Operating Report WATER QUALITY MANAGEMENT Water is an essential component in electricity produc-tion, and all electric utilities must comply with extensive federal, state and local water regulations.

These regulations govern virtu-ally every aspect of business operations at the South Texas Project. Water usage and wastewater treatment onsite are regulated under the Safe Drink-Photo By: Gwenna Kelton ing Water Act, the Federal Clean WaterAct and the Texas as cooling water for plant needed to condense steam and Water Quality Act. Collectively, activities. Water from the provide cooling for plant gener-these acts provide for the Colorado River replenishes the ating systems. The majority of safeguarding of public drinking Main Cooling Reservoir via this water is drawn from and water supplies and maintaining intermittent pumping periods. returned to the station's Main the integrity of state and federal Surface water diverted to the Cooling Reservoir. The Main waters.

Main Cooling Reservoir from Cooling Reservoir is a 7,000-the Colorado River accounted acre, above grade, off-channel The South Texas Project for approximately 98 percent of reservoir capable of impounding uses both surface water and the water used at the South 202,600 acre-feet of water at its groundwater for station pur-Texas Project in 2004. Based maximum level. Reservoir poses. Groundwaterprovides on the most current information makeup water is withdrawn onsite drinking water for station available from the Texas Water intermnittently from the adjacent personnel, replenishes the Colorado River. In addition, the Development Board, the South Essential Cooling Pond, and is Texas Project typically accounts Essential Cooling Pond, a 46.9-used for other industrial pur-for approximately 25 percent of acre, below grade, off-channel poses onsite. Consistent with the the combined ground and reservoir that supplies water to station's environmental principles surface water usage in cool crucial plant components is encouraging efficient water Matagorda County with the bulk capable of impounding 388 usage and conservation, ground-of county water use being acre-feet of water. Various water usage is carefully managed related to agriculture. Additional water rights permits, contractual to conserve this important information regarding water use agreements and compliance resource. Groundwater pro-in Texas can be found on the documents authorize the South vided approximately two per-website maintained by the Texas Texas Project to maintain these cent of the water utilized in 2004 Water Development Board at reservoirs, impound water by the South Texas Project.

http://www.twdb.state.tx.us/. diverted from the Colorado Surface water from the Main River, and to circulate, divert Cooling Reservoir and the Most of the water used by and use water from the reser-Essential Cooling Pond is used the South Texas Project is voirs for industrial purposes to 4 STP Nuclear Operating Company C-NP14 4-3

2004 Environmental Report operate the plant. These permits Commission on Environmental selected and implemented to also limit the rate of diversion Quality and Texas Water Devel- prevent or control the discharge from the Colorado River. The opment Board. of pollutants in storm water South Texas Project diverted runoff. In September of 1998, 62,374 acre-feet from the Wastewater generated at the the United States Environmen-Colorado River in 2004 for the South Texas Project is pro- tal Protection Agency modified Main Cooling Reservoirfill cessed and discharged to the the storm water permit program operations while preserving onsite Main Cooling Reservoir to require facilities, such as the adequate freshwater flow to be re-used by the station as South Texas Project, permitted conditions for downstream bay cooling water for plant systems. under the baseline general and estuarine ecosystems. No water was released from the permit to obtain permit cover-reservoir in 2004. The station age under a multi-sector Existing federal and state continued its outstanding waste- general storm water permit.

water quality standards are water discharge compliance Accordingly, the station filed a implemented and enforced performance record in 2004. Notice of Intent for transfer through the Texas Pollutant Station conditions did not from the General Permit to the Discharge Elimination System require site aquatic monitoring Multi-Sector General Permit (TPDES) permit program to studies be conducted in 2004 with the United States Environ-restore and maintain the state's nor were any additional studies mental Protection Agency in waters. In 1998, the State of required by the United States 1998. The Texas Natural Texas assumed authority to Environmental Protection Resource Conservation Com-administer and implement the Agency or the State of Texas mission issued a TPDES Multi-federal National Pollutant eitherby way of station dis- Sector General Permit in Discharge Elimination System charge permits or otherwise. August of 2001. The station (NPDES) program. Accord- Wastewater discharges met state filed a Notice of Intent in ingly, federal and state require- and federal water quality stan- November of 2001 to obtain ments were consolidated in dards demonstrating a 100 coverage under the state permit November of 2000 into one percent compliance record for and the station's Storm Water wastewater discharge permit for the year while conserving and the station under the TPDES maximizing efficient water usage permit program. Under this at the station. '

permit program, the South Texas Project monitors, records and In addition to the wastewater reports the types and quantities discharge permit program, the of pollutants from wastewater Federal Clean Water Act, as discharges to ensure that we amended in 1987, requires meet or exceed the stringent permits for storm water dis-levels set in the permit. A charges associated with indus-monthly monitoring report is trial activity. The South Texas submitted to the Texas Commis- Project Storm Water Pollution sion on Environmental Quality Prevention Plan, implemented in for wastewater discharges.' - October of 1993, ensures that Reports identifying ground and potential pollution sources at the surface water use are also site are evaluated,' and that submitted annually to the Texas appropriate measures are Photo By: Gwenna Kelton STP Nuclear Operating Company 4-4 folzD

Non-Radiological Environmental Operating Report Pollution Prevention Plan was Texas Project continues to AIR QUALITY MAN-modified accordingly to reflect actively participate in the Lower AGEMENT these changes. This plan is a Colorado Regional Water working document that is Planning Group to identify Air emission sources at the revised whenever there is a strategies to meet future water South Texas Project fall under change in design, construction, supply demand projections for the scope of air pollution regula-operation or maintenance that the region and update the tions promulgated under the has a significant effect on the existing plan accordingly. Addi- Texas Clean Air Act and the potential for the discharge of tional information regarding Federal CleanAirAct and the pollutants from the station. regional water planning in Texas numerous associated amend-can be found on the website ments. The purpose of these Following a severe drought in maintained by the Texas Water regulations is to protect air 1996, the Texas Legislature Development Board at http:// resources from pollution by recognized the need to address www.twdb.state.tx.us/. controlling or abating air pollu-a wide range of state water tion and emissions. Regulated resource management issues. In The South Texas Project emission sources at the South 1997, the Texas Senate drafted understands that the water Texas Project include a fossil-legislation known as Senate Bill resources of the state are a fuel boiler, emergency diesel 1 to address these issues and to critical natural resource requiring generators, fire-fighting training develop a comprehensive state careful management and conser- and other minor maintenance water policy. Towards this end, vation to preserve water quality equipment and activities.

this legislation required that the and availability. Accordingly, the Texas Water Development station continues to explore and Fossil-Fueled Emission Board create a statewide water support efforts focusing on the Sources plan that emphasizes regional efficient use of water resources planning. Sixteen planning and reduction of water waste. Unlike conventional electrical regions were created, each generating stations, nuclear tasked to prepare a regional plan for the orderly develop-ment, management and conser-vation of water resources. The South Texas Project was chosen to represent the electric generat-ing utility interest for the water-planning region that encom-passes the lower Colorado River Basin. Plans subsequently submitted by each planning region were incorporated into a State Water Plan in the year 2001. However, water resource planning is a continuous process and the Regional and State water plans must be updated every five years. The South Photo By: Givenna Kelton 4 STP Nuclear Operating Company 4-5

2004 Environmental Report 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 deaerator startup, turbine gland seals and radioactive liquid waste processing when steam is not available from the nuclear steam supply system. In March of 2004 during mainte-Photo By: Gwenna Kelton nance on the station's auxiliary boiler, stack emissions exceeded power plants do not bum and emergency equipment. Air permitted opacity limits for a petroleum fuel. Therefore, the emission sources at the South short duration. This excursion South Texas Project produces Texas Project fall under the was anticipated and prior virtually no greenhouse gases or scope of air pollution regulations notification for this scheduled other air pollutants that are the promulgated under the Texas maintenance activity was submit-typical by-products of industrial Clean AirAct, the Federal Clean ted to and also subsequently production processes. The use AirAct and numerous associ- reported as a deviation to the of emissions-free nuclear power ated amendments that protect air Texas Commission on Environ-is a significant contributor to the resources from pollution by mental Quality. In addition to preservation of our community's controlling or abating air pollu- the auxiliary steam boiler, a clean air resources. The South tion and emissions. The major number of fossil-fueled diesel Texas Project uses small regulated air emission sources at generators are located onsite.

amounts of fossil fuel for backup the South Texas Project include These diesels are designed to provide emergency power to various plant systems or build-ings in the event of a loss of power. This equipment is not normally needed for daily operations and the station does not use it to produce electricity for distribution. Routine mainte-nance runs are conducted to ensure availability if needed and for equipment maintenance.

Title V Federal Operating Permit Photo By. Barbara Carnley In 1990, amendments to the Federal Clean Air Act mandated STP Nuclear Operating Company 0%

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Non-Radiological Environmental Operating Report a new permitting program to clearly define applicable air quality requirements for affected 2004 Nonradioactive Waste Management facilities such as the South Texas South Texas Project Project. This program is com-monly known as the Title V Recycle 59.7o/

Operating Permit Program and is administered by the state. The Texas Natural Resource Con-servation Commission (now known as the Texas Commission Incineration &

on Environmental Quality) issued Fuel Blending Landfill a Federal Operating Permit in 2.4%

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January of 2000 for the South Texas Project granting authority to operate identified emission Figure 4-1 sources at the station in accor-dance with applicable permit and regulatory requirements. definition, solid waste includes reduced annual hazardous waste The Texas Commission on solid, semi-solid, liquid and generation quantities. Texas Environmental Quality revised gaseous waste material. The Commission on Environmental the permit in July of 2003 to add Texas Commission on Environ- Quality regulations require that applicable requirements regard- mental Quality, which adminis- industrial solid wastes generated ing minor new source review ters the Texas Solid Waste at the South Texas Project be authorizations. In accordance Disposal Act and also the identified to the Commission and with the South Texas Project's federal Resource Conservation these are listed in the Texas Federal Operating Permit's and Recovery Act program, is Commission on Environmental reporting requirements, one the primary agency regulating Quality Notice of Registration deviation from penm-it conditions non-radioactive wastes gener- for the South Texas Project.

was reported to the Texas ated at the South Texas Project. The registration is revised Commission on Environmental The Texas Commission on whenever there is a change in Quality as discussed previously. Environmental Quality regulates waste management practices at the collection, handling, storage the site. Waste handling and NON-RADIOACTIVE and disposal of solid wastes, disposal activities are summa-WASTE MANAGEMENT including hazardous wastes. The rized and documented in a waste transportation of waste materials summary report for the South Solid waste management is regulated by the United States Texas Project that is submitted procedures for hazardous and Department of Transportation. annually to the Texas Commis-non-hazardous wastes generated sion on Environmental Quality.

at the South Texas Project The South Texas Project ensure that wastes are properly was re-classified with the Texas dispositioned in accordance with Commission on Environmental Hazardous waste accumula-applicable federal, state and Quality as a small quantity tion at the South Texas Project local environmental and health generator of industrial solid in 2004 was limited to a maxi-regulations. By regulatory wastes in 2004 based on mum holding period of 180 C_ V4 4-7

2004 Environmental Report days. The Resource Conserva- processed for re-use. (Refer- saves approximately 17 trees, tion and Recovery Act and ence Figure 4-1) The South eliminates approximately three Texas Solid Waste Disposal Act Texas Project ships waste oil, cubic yards of landfill material also require the use of proper grease, electrohydraulic fluid, and saves enough energy to storage and shipping containers, adhesives, liquid paint and power the average home for six labels, manifests, reports, solvent for fuel blending and months. The station continues to personnel training, a spill control thermal energy recovery. Used explore new areas where plan and an accident contin- oil, diesel fuels and antifreeze recycling may be expanded or gency plan. Plant personnel solutions are sent to a recycling initiated.

routinely inspect areas through- vendor for re-processing.

out the site to ensure wastes are Lead-acid batteries are re- Non-radioactive solid waste that not stored or accumulated turned, when possible, to the cannot be shipped for recycling inappropriately. original manufacturer for recy- is shipped for disposal. Munici-cling or are shipped to a regis- pal-type trash is transported to Station policies and regula- tered battery recycler, thereby the county landfill transfer station tions encourage the recycling, reducing the volume of hazard- for appropriate disposition.

recovery or re-use of waste ous waste that might otherwise Construction-related non-when possible to reduce the be generated. A site paper combustible, inert debris, if amount of waste generated or recycling program results in the generated, is placed in the onsite disposed of in landfills. Ap- collection of several tons of landfill. Waste minimization and proximately 60 percent of the paper each year. In 2004, the source reduction efforts by industrial non-radioactive waste station collected approximately employees allowed the South generated in 2004 at the South 71 tons of paper for recycling. Texas Project to to re-classify as Texas Project was recycled or Every ton of paper recycled a small-quantity generator early 2004 Nonradioactive Waste Generation South Texas Project Non-Hazardous Waste I/ \ Universal Waste Hazardous Waste wUsed Batteries 0.1/3%

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Non-Radiological Environmental Operating Report annual refresher training in Hazardous Waste Generation Historical hazardous material incident Comparison South Texas Project response. In April and August of 2004, the South Texas Project reported to state, federal 25 and local agencies two small 20 releases of lubricating oil from separate screenwash pumps of approximately half a pint and 1 15 0

quart respectively to the Reser-voir Makeup Pumping Facility 1997 1998 1999 2000 2001 2002 2003 2004 forebay area. The releases were contained to the forebay area E Hazardous Waste from Cleanup of an Onsite Spill and no offsite release occurred.

U Hazardous Waste Final cleanup of the area was Figure 4-3 completed on each occasion and the pumps were subsequently removed and modified to in 2004. Hazardous waste standard site operating proce-eliminate the need for lubricating accounts for only a small portion dures and guidelines. The South oil. No other significant or of the waste generated at the Texas Project uses standard consequential spills occurred in South Texas Project; however, operating procedures, policies 2004.

minimization and reduction of and programs to minimize the ENVIRONMENTAL hazardous waste generation generation of waste materials, PROTECTION PLAN where feasible remains an control chemical usage and STATUS important goal at the station. prevent spills. The South Texas (Reference Figures 4-2 and 4-3) Project also evaluates chemicals The South Texas Project's and products proposed for use, Environmental Protection Plan CHEMICAL which could come in contact was issued in March of 1989 to CONTROL AND with plant components. Site provide for the protection of MANAGEMENT procedures address the evalua-non-radiological environmental tion, storage, use, spill control, values during operation of the In 2004, the station com- and disposal requirements of South Texas Project. This pleted and implemented the chemicals. These guidelines report reviews Environmental Integrated Spill Contingency assist in reducing wastes, ensure Protection Plan non-compli-Plan for the South Texas proper packaging for disposal ances identified by the plant in Project Electric Generating and mitigate the consequences 2004 and the associated correc-Station. This plan replaced the of inadvertent spillage.

tive actions taken to prevent previous Oil and Hazardous their recurrence. Potential Material Contingency Plan for The South Texas Project nonconformities are promptly the station. The Integrated emphasizes awareness training addressed, as identified, to Spill Contingency Plan con- for spill prevention and maintains maintain operations in an envi-solidates multiple federal and station readiness to respond ronmentally acceptable manner.

state requirements into one plan. should a spill occur. Spill The station uses its Corrective The plan is implemented through response team members receive Action Program to document CM4_14 4-9

2004 Environmental Report these conditions and track Environmental Statement Events that require reports corrective actions to completion. related to the Operation to federal, state or local agencies Internal assessments, reviews of South Texas Project, other than the Nuclear Regula-and inspections are also used to Units 1 and 2 (Docket tory Commission such as those document plant compliance. Nos. 50-498 and 50- discussed earlier in this report 499), environmental are reported in accordance with This report also reviews impact appraisals, orin the applicable reporting require-non-routine reports submitted by any decisions of the ments. TheNuclearRegulatory plant personnel and any activities Atomic Safety and Commission is provided with a that involved a potentially Licensing Board; or, copy of any such report at the significant unreviewed environ- 2) A significant change in time it is submitted to the cogni-mental question. A proposed effluents orpowerlevel; zant agency. If a non-routine change, test or experiment is or, event occurs and a report is not considered to present an 3) A matter not previously required by another agency, then unreviewed environmental reviewed and evaluated a 30-day report to the Nuclear questions if it concerns: in the documents speci- Regulatory Commission is fied in (1) above, that required by the Environmental

1) A matter that may result may have a significant Protection Plan. No such 30-in a significant increase adverse environmental day or other non-routine report in any adverse environ- impact. of this type was required in mental impact previously 2004.

evaluated in the Final No unreviewed environ-mental questions were identified in 2004.

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Radiological Environmental Introduction and Summary

There were two items of interest identified by this program during 2004. A short description of them follows.

Cobalt-60 levels in reservoir bottom sediment samples vary but remain within the expected range. The amount of Cobalt-60 in the Main Cooling Reservoir has decreased because of additional equipment installed to reduce radioactive effluents.

Low level tritium was monitored in shallow aquifer ground water samples. The shallow well was located within approximately seventy-five yards of the Main Cooling Reservoir dike base. The concentration was lower than 2003 but is probably due to the rain infiltration into the well and the concentration is less than in the Main Cooling Reservoir.

Operation of the South Texas Project continues to have no detectable radiological impact offsite.

Samples analyzed from the off-site sampling stations continue to show no radiological contribution from plant operation. The radiological doses received by the general public from plant operations were less than one millirem which is insignificant when compared to the 360 millirems average annual radiation exposure to people in the United States from natural and medical sources.

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ee:g7 Radiological Environmental PROGRAM DESCRIPTION minimum sampling locations and maps that identify permanent frequency ofcollection. sample stations. Descriptions of The South Texas Project initiated sample stations shown on Figures a comprehensive pre-operational Sampling locations consist of 6-1 and 6-2 are found in Table 2.

Radiological Environmental indicator and control stations. Table 2 also includes additional Monitoring Program in July 1985. Indicator stations are locations on sampling locations and media types That program terminated on oroff the site that may be influenced that may be used for additional March 7, 1988, when the by plant discharges during plant information. Figure 6-3 illustrates operational program was operation. Control stations are the zones used when collection implemented. The pre- located beyond the measurable locations are not permanent sample operational monitoring program influence of the South Texas stations.

data forms the baseline against Project or any other nuclear facility.

which operational changes are Although most samples analyzed ANALYSIS OF RESULTS measured. are accompanied by a control AND TRENDS sample, it should be noted that this Critical pathway analysis requires practice is not always possible or Environmental samples from areas that samples be taken from water, meaningful with all sample types. surrounding the South Texas air, and land environments. These Fluctuations in the concentration of Project continue to indicate no samples are obtained to evaluate radionuclides and direct radiation significant radiological effects from potential radiation exposure. exposure at indicator stations are plant operation. Analytical values Sample types are based on evaluated in relation to historical from offsite indicator sample established pathways and data and against the control stations continue to trend with the experience gained at other nuclear stations. Indicator stations are control stations. Onsite indicator facilities. Sample locations were compared with characteristics samples continued to increase or determined after considering site identified during the pre- decrease in measured values as meteorology, Colorado River operational program to monitor for expected.

hydrology, local demography and radiological effects from plant land use. Sampling locations are operation. Average quarterly beta activity furtherevaluated and modified from three onsite indicator stations according to field and analysis Several sample identification and a single control station for air experience. Table I lists the methods are used to implement the particulate samples have been program. Figures 6-1 and 6-2 are compared historically from 1988

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2004 Environmental Report Designated Sample Locations Figure 6-1 6-2 6%Y I

Radiological Environmental Designated Sample Locations (On Site Sample Locations)

REMP ON SITE SAMPLE LOCATIONS 2X SCALE Figure 6-2 4

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2004 Environmental Report Zone Location Map Figure 6-3 6-4 fv z1 -

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Radiological Environmental through 2004 (see Figure 6-4). The analysis revealed that it was all Sensitive Indicator Stations are in average of the onsite indicators natural radioactivity. the directions that the wind blows trend closely with the offsite control most often and are one mile from values. The comparison illustrates Direct gamma radiation is the power plants on Farm-to-that plant operations are not having monitored in the environment by Market Road 521 (Stations #1, an impact on air particulate activity thermoluminescent dosimeters # 15 and # 16). The Indicator even at the Sensitive Indicator located at 43 sites. The natural Stations are the remainder of the Stations (# 1, # 15, and # 16). These direct gamma radiation varies stations excluding Stations #38,40, stations are located near the plant according to location because of and 42. The values plotted are the and are located downwind from the differences in the natural averages for all of the stations plant based on the prevailing wind radioactive materials in the soil, its according to type. Figure 6-5 direction. The beta activity moisture content and the vegetation indicates changing conditions in the measured in the air particulate cover. Figure 6-5 compares the area of the individual stations. The samples is from natural radioactive amount of direct gamma radiation average of the Control Stations is material. As a routine part of the measured at the plant since the higher than the other stations program, we perform gamma fourth quarter of 1985 for three because station #23 is in an area analysis on quarterly composites of different types of stations. The that has a slightly higher natural the air particulate samples to Control Stations are greater than background radiation, probably determine if any activity is from the 10 miles from the site and are in the due to the soil composition. The South Texas Project. The gamma direction of the least prevailing trends of Figure 6-5 clearly show winds (Stations #23 and #37). The that the power plants are not adding Historical Comparison of Average Quarterly Beta Activity from Indicator and Control Air Samples 1988 - 2004 ma) 0.035 0.030 0.025 0.020 0.010 - E 0.005 - _____

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2004 Environmental Report to the direct radiation in the Cesium- 137 was also measured in Tritium is a radioactive isotope of environment. four of seven Main Cooling hydrogen and is produced during Reservoir bottom sediment plant operation. Tritium produced Bottom sediment samples are taken samples and in one of three in the reactors is a part of the water from the Main Cooling Reservoir indicator station and one of two molecule. Wastewater is treated to each year. Figure 6-6 shows the control station shoreline sediment remove impurities before release, positive results from two plant- samples on the Colorado River. but tritium cannot be removed produced radioactive materials, However, Cesium- 137 was present because it is chemically part of the Cobalt-58 and Cobalt-60. The in the environment before the water molecule. Some of the tritium Cobalt-58 and Cobalt-60 operation of the South Texas is released into the atmosphere and inventory in the reservoir has Project and the sample the remainder is released into the decreased since 1992 because of concentrations were approximately Main Cooling Reservoir. The equipment installed to reduce equal to pre-operational values. tritium escapes from the Main radioactive effluents. The amount No other isotopes released from Cooling Reservoir by evaporation, of Cobalt-58 has decreased below the plant were identified in the movement into the shallow aquifer, levels that can be reliably detected. shoreline samples, which indicates and by percolation from the relief The concentration of Cobalt-60 in that the plant was probably not the wells that are a part of the dike's the reservoir bottom sediment source of Cesium- 137 in these stabilization system. Figure 6-8 samples varies but is within the samples. The Cesium-137 shows the amount of tritium expected range. Figure 6-7 measured in the Main Cooling released to the Main Cooling demonstrates the decline in the total Reservoir does not suggest an Reservoir each year and the amount amount of Cobalt-60 in the increase due to plant operation. present during the last quarter of reservoir. each year. This indicates that Environmental Dosimeter Comparisons 22 Average of Indicator Stations Average of Control Stations Sensitive Indicator Stations 20 18 4 16 o 14 12 Utnit #1 Criticality - 03/08/88 Unit 0t2 Criticality - 03/12/89 10 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Results by Quarter Figure 6-5

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Radiological Environmental Historical Comparison of Cobalt-58 & Cobalt-60 in Main Cooling Reservoir Sediment 1986 - 2004 1800 S Station #215 : Cobalt-58 1600 Plant Discharge

Station#215: Cobalt-60 1400 Plant Discharge 19Station #216: Cobalt-58 1200 Blowdown Structure 1 ____

1000 -_Blowdown UStation #216: Cobalt-60 Structure 800 -The Cobalt-58 activity in the reservoir has decreased to

°600 below levels that can be detected. Statistical variations 40 ltypical of material in a 400 - _ lparticulate form are seen in 1996 & 1997 Cobalt-60 200 I values. The inventory of l* II 1992 due to radioactive decay 1 1988illand 1990 reduced liqu1d effluents.

1986 1987 1988 1989 1901991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Figure 6-6 Calculated Cumulative Curies of Cobalt-60 in the Main Cooling Reservoir W 3-V _

Cobalt-60 ASSUMPTIONS:

1. Radioactive decay is the only mechanism for removal from the Main Cooling Reservoir.

2. The initial time for calculating the remaining radioactivity is July I of the year released.

Figure 6-7 6-7....

2004 Environmental Report Historical Comparison of Tritium Added to and Remaining in the Main Cooling Reservoir 1989 - 2004 4000 3500 -

3000 +

2500 - -

0 I 2000 U1 1500 1000 0

1989 1998 1991 1992 1993 1994 199S 1996 1997 1998 1999 2000 2001 2002 2003 2004 MThilum Rektled to t& Main Cooling Reservoir *Tridm Memied inte Main Cooling Resevor Figure 6-8 Historical Comparison of Tritium Activity in Surface Water 1988 - 2004 30000 i10000 5000 1 ,Ie 91 l, 149 294 19W low 19W 14 i0 UGI In M0i Wc o Rierm Sample Uopscan of PI t (Oflsiet) #Q02 UIRiverSampleDownuaiofPlan(Offrite) #QOI

Weist Brmbl of Rixr (Onsita) #213 *Litle RobbinsSlough (Onsit) #212

East Btanch of Little Robbin Stough (Onsift) #211 *Ditch NE of Main Cooling Rervois (Onwit) #229 O Main Cooling Reservoir lowomwn (Osite) #237 UMain Cooling Resevoir (Onsin) #216 Figure 6-9 th 6-8

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Radiological Environmental almost half of the tritium is removed increasing until they are near tritium is not present. The waters in from the reservoir annually. One of equilibrium with reservoir levels. the reservoir and other surface the pathways tritium escapes from The average tritium concentration bodies of water onsite are not used the reservoir is by evaporation. has increased in the sloughs and as drinking water. The only way Rainwater was collected during ditches because it takes several tritium could be introduced into 2004 to determine if the tritium years for water to move from the humans is by eating fish from the remained in the local area. Tritium reservoir to the relief wells. reservoir, which is not permitted. If was not found in any rain water a person ate forty pounds of fish a samples. Tritium was identified in a shallow year from water that contained the (ten to thirty feet deep) aquifer test United States Nuclear Regulatory The concentration of tritium in the well approximately seventy-five Commission reporting level Main Cooling Reservoir increased yards south of the reservoir dike (30,000 picoCuries per kilogram),

in 2004. Tritium enters the sloughs base during 1999. In 2004, the that person would receive less than and ditches of the site as runoff from concentration decreased in this well one millirem. This is insignificant the relief wells that surround the which could be the result of compared to the almost twenty reservoir. The tritium concentration rainwater seeping into the well. The millirem a year everyone receives in eight surface water sample points concentration should rise and fall if from naturally occurring for 1988 through 2004 is shown in it follows the trends observed in radioactive potassium in the body.

Figure 6-9. The specific sample surface water samples onsite. The current reservoir concentration point locations can be found in is less than 1/3 of the reporting Table 2. Tritium levels in the onsite The drinking water onsite is level.

sloughs and ditches have increased pumped from deep aquifer wells and are expected to continue and is tested quarterly to verify Some samples are collected and analyzed in addition to those 2004 Radiological Laboratory Quality Assurance Program Performance 0"5% Difference W 5-10% Difference 10-15% Difference 78 Total Analyses Figure 6- 10 4

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2004 Environmental Report required by our licensing location of residents and the use of residence in each sector are listed documents or internal procedures. the land within five miles of the below.

These samples are obtained to give South Texas Project generating additional assurance that the public units. The information is used to and the environment are protected determine whether any changes are from any adverse effects from the needed in the Radiological plant. These samples include Environmental Monitoring pasture grass, sediment samples, Program. The census is performed rain water, and water samples from by contacting area residents and various ditches and sloughs onsite, local government agencies that and air samples near communities provide the information. The results or other areas of interest. The of the survey indicated that no results of these analyses indicate changes were required.

that there is no detectable radiological effect on the In addition, a survey is performed environment by plant operation. to verify the nearest residents within five miles of the South Texas LAND USE CENSUS Project generating units in each of Photo By: Gwenna Kelton 16 sectors. The nine sectors that The Annual Land Use Census is have residents within five miles and performed to determine if any the distance to the nearest changes have occurred in the

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Radiological Environmental The following items of interest were noted during the census A 110-acre wetland prairie project continues to provide a habitat for migratory birds and waterfowl. The habitat is located northeast of the power plants. ". 4. I,..

A Colorado River water from below the B ay City Dam has not been . - IWAIS,' gi :o R~

used to irrigate crops. all-'* 30 t No commercial dairy operates in Matagorda County and there is no agricultural milk source within the five-mile Zone.

There were no identified commercial vegetable farms located within the five-mile Zone.

R@JS Two commercial fish farms continue to operate. One is two miles west of the plant nearFM 521 and the second is five miles southwest of the plant. The water supply for the ponds is not affected by the operation of the STP power plants.

Photo By: Gvvenna Kelton Photo By: Givenna Kelton to STP Nuclear Operating Company 6-11

2004 Environmental Report QUALITYASSURANCE assurance programs. These PROGRAM DEVIATIONS programs provide samples that are Quality assurance encompasses similar in matrix and size to those Deviations from the sampling planned and systematic actions to measured for the Radiological program must be acknowledged ensure that an item or facility will Environmental Monitoring and explained in this report. During perform satisfactorily. Reviews, Program.

2004 the following samples were surveillance and audits have not collected or were unacceptable determined that the programs, Figure 6-10 summarizes the results for analysis:

procedures and personnel are of these inter-comparison adequate and do perform programs. In addition, satisfactorily. approximately twenty percent of t Six out of thirty-six required the analyses made are quality broadleaf vegetation samples Quality audits and independent control samples that consist of were not collected due to technical reviews help to determine duplicate, split and blind samples. seasonal unavailability in areas that need attention and re-January and February.

evaluation. Areas that need Radiochemical measurements must attention are addressed in meet sensitivity requirements at the Four out of two hundred and accordance with the station's lower level of detection for sixty air samples were not Corrective Action Program. environmental samples. These continuously collected for the stringent requirements were met in full time interval due to power The measurement capabilities of the all samples taken in 2004.

failures. However, all air Radiological Laboratory are particulate and air iodine demonstrated by participating in samples met the LLD inter-laboratory measurement requirements and the results are included in Table 3.

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Radiological Environmental The minimium Radiological Environmental Nlonitoring Program is presented in Table I. The table is organized by exposure pathway. Specific requirements like location, sampling method, collection frequency, and analyses are given for each pathwvay.

TABLE 1 RAkDIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM EXPOSURE: I)IRECT RAI)IATiON 40 TOTAL SAMPLING STATIONS Sample Media. Number, Approximate Location and Distance of Routine Sampling Sampling and Analysis Minimum Sample Stations from Containment. Mode Collection Type Analysis l Frequency Frequency Exposure Media: TLD 16- Located in all 16 mcteorological sectors. 0.2* to 4 miles. Continuously Quarterly Gamma dose Quarterly 16- Located in all 16 meteorological sectors. 2 to 7 miles.

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

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

The inncr ring of stations in the southern sectors arc located within I mile because of thc main cooling reservoir EXP'OSUREt: Ajl tIlttNI TOTAL SAMPLING STATIONS Samnplie NMedi a. NUnhber. ApprosximateL cat in,

... and tDistantlce of RtoSut inc Sampling Nom inal Analysis Ntinimuim Sample Stat ions tront Containument. Mode Cotllec ion TyPc Analysis Ficlqtency Frequency

£harrv;aLand LIaric-ulate li~temr I- Ioc-ated at tue cxclusion zioc. N. NNW. NW Sectors. I nile. Co ct inuou.s -itpler Wceekly or moore lLdiojodi- ic Weekly opecrat~ ions treqe nctly if CALisLer:

l- Located in 11ay City. 14 miles, required by dust 1-131 loading 1- Control Station. located in a minimial wind direction (WSW). 10 ParficulaitC miles. -SM2---

Grosss Bteta ti'olowing fiter Activity change Gamma- Quarterly Isotopic of comipoisite (by location) t~i'(s>)S;Jt~t4 veAljz]ttt() --

t tI TOTAL SAMI'IN(tSC;srArlltNSb Sa-ntlc Mcdia. N-it n.--t And A<.fh, nmoff S-cpltcsc taic. 14.tinS.c irAg Nc.-ci nAnaly.i. Minimutn s utji ;s I- l1.-Ctd icc N1CRt ., itc NICRt hli-dw-in slr-ctcMc. ncsctc s:cIt - e MccItly

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2004 Environmental Report TABILE 1 RADIOL1OGICAIL ENVIRONMVENTAL, MONITORING PROGRAM EXPOSURE: WATERBORNE (CONTINUED)

Sample Media. Number And Approximate Location of Sample Stations Routine Sampling Nominal Analysis Minimum Mode Collection Type Analysis Frequency Frequency DrinkingzWter_

I- Located on site

Grab Monthly Gross Beta & Monthly Gamma-1- Located at a control station. Isotopic Tritium Quarterly Sediment Composites 1- Located above the site on the Colorado River. not influenced by Grab Semi-annually Gamma- Semi-annually plant discharge. Isotopic I- Located downstream from blowdown entrance into the Colorado River.

_1- 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: INGESTION 7 TOTAL SAMPLING STATIONS Sample Media. Number And Approximate Location of-Sample Stations Routine Sampling Mode Nominal Collection Analysis Type

[Minimum Analysis

_ Frequency Frequency Milk Grab Semi-monthly Gamma- Semi-monthly

when animals are Isotopic when animals are on pasture; and I-131 on pasture-monthly at other monthly at other times. times.

Broadleaf Vepetation 2- Located at the exclusion zone, N. NW. or NNW sectors. Grab Monthly during Gamma- As collected growing season Isotopic

_Il Located in a minimal wind direction. (When available) and l-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 Stations Routine Sampling Nominal Analysis Minimum Mode Collection Type Analysis Frequency Frequency Fish and Invertebrates (edible portions) 7 1- Representing commercially or recreational important species Grab Sample semi- Gamma- As collected in vicinity of STP that maybe influenced by plant operation. annually Isotopic on edible portions 1- Same or analogous species in area not influenced by STP.

l1- Same or analogous species in the MCR.

Gamma-Acricultural Products Grab At time of harvest Isotopic As collected Analysis in edible portion Domestic Meat lllGma Gamma-1- Represents domestic stock fed on crops grown exclusively within 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 water into which liquid plant wastes will be discharged. Agricultural products will be considered if these conditions change.

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Table 2 Sample Media and Location Description Al AIRBORNE RADIOIODINE L5 CABBAGE AP AIRBORNE PARTICULATE L6 COLLARD GREENS Bi RESIDENT DABBLER DUCK Ml BEEF MEAT B2 RESIDENT DIVER DUCK M2 POULTRY MEAT B3 MIGRATORY DABBLER DUCK M3 WILD SWINE B4 MIGRATORY DIVER DUCK N14 DOMESTIC SWINE I.

B5 GOOSE M6 GAME DEER B6 DOVE M7 ALLIGATOR B7 QUAIL N18 RABBIT B8 PIGEON OY OYSTER CC CRUSTACEAN CRAB SO SOIL CS CRUSTACEAN SHRIMP SI SEDIMENT - SHORELINE DR DIRECT RADIATION S2 SEDIMENT - BOTTOM Fl FISH - PISCIVOROUS VB Ll, L2, L4, L5 or L6 F2 FISH - CRUSTACEAN & INSECT VP PASTURE GRASS FEED ERS__ _ _ _ _ _ _ _ _ _ _ _ _

F3 FISH - PLANKTIVORES & DETRITUS WD DRINKING WATER FEED ERS__ _ _ _ _ _ _ _ _ _ _ _ _

LI BANANA LEAVES WG GROUND WATER L2 CANA LEAVES WS SURFACE WATER L4 TURNIP GREENS WW RELIEF WELL WATER 1

4 .s I I' N l I ( )'i 1 ( 11i 111 CMwV4

2004 Environmental Report Table 2 Sample Media and Location Description MEDIA CODE STATION VECIOR LOCATION DESCRIPTION CODE (Approximate)

DR AI AP VB VP SO 001 I mile N FM 521 DR 002 Imile NNE FM 521 DR 003 1 mile NE FM 521 DR 004 1 mile ENE FM 521 DR 005 1 mile E STP Visitor Center on FM 521 DR AI AP SO 006 3.5 miles ESE Site near Reservoir Makeup Pumping Facility DR 007 3.5 miles SE MCR Dike DR 008 0.25 mile SSE MCR Dike DR 009 0.25 mile S MCR Dike DR 010 0.25 mile SSW MCR Dike DR 011 0.5 mile SW MCR Dike DR 012 1.5 mile WSW MCR Dike DR 013 1.5 mile W FM 521 DR 014 1.5 mile WNW FM 521 DRAI AP'B SO VP 015 1 mile NW FM 521 DR Al AP V7B SO VP 016 1 mile NNW FM 521 DR 017 6.5 miles N Buckeye - FM 1468 DR Al AP SO 018 5.5 miles NNE Celanese Plant - FM 3057 DR 019 5.5 miles NE FM 2668 DR 020 5 miles ENE FM 2668 & FM 2078 DR 021 5 miles E FM 521& FM 2668 DR 022 7 miles E Equistar Chemical Plant DR 023

16 miles ENE Intersection of FM 521 and FM 2540 MCR-STP Main Cooling Reservoir STP-South Texas Project Media codes typed inbold satisfy collection requirements described in Table 1.

Control Station STP Nuclear Operating Company 6-16 folzD

Radiological Environmental

=-_=:i '~.I . _ _ _ . _7 Table 2 Sample Media and Location Dcscription NEI)IA COI)E STATI ON VECTOR LOCATION D)ESCRIPTION CODE (Approximate)

DR 024 4 miles SSE MCR Dike DR 025 4 miles S MCR Dike DR 026 4 miles SSW MCR Dike I)R 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 Crcck Road DR 032 3.5 miles NNW FM 1468 DR Al All SO 033 14 miles NNE Microwave Tower at end of Kilowatt Road in

____ ___ Bay City I)R 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 1)1D Al AP VIB VP SO 037* 10 miles WSW Palacios CP&L Substation DR 038 10.5 miles NW CP&L Substation on TX 71 near Blessing T X 35 under High Voltage Power lines near DR Al AP s0 039 9 miles 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 VD 210 On Site Approved drinking water supply from STP WS S1 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 1.

Control Station 00 .1 I I' a,,; i -,I ( 1 (

6 17

2004 Environmental Report Table 2 Sample Media and Location Description MEDIA CODE STATION VECTOR LOCATION DESCRIPTION CODE (Approximate)

WS Si 212 4 miles S Little Robbins Slough WS S1 213 4 miles SE West Branch Colorado River F (1,2, or 3) CC 214 2.5 miles SE MCR at Makeup Water Discharge S2 215 0.5 mile SW MCR at Circulating Water Discharge WS S2 216 3.5 miles SSE MCR at blowdown structure F (1, 2, or 3) CC CS OY 222 >10 miles West Matagorda Bay S oWest bank of Colorado River downstream of

S S(1 or 2) 227 5-6 miles SE STP across from channel marker #22 WD 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 r 2)230 3.5 ilesESE Colorado River at point where drainage ditch 5(1 or 2) 230 3.5 miles ESE (#229) empties into it S(l or 2) WS 233 4.5 miles SE Colorado River where MCR blowdown S~l r 2 WS233 .5 ile SE discharge channel empties into it.

WG 235 3.8 miles S Well B-3 directly south from MCR B8 236 N/A STP Protected Area WS 237 3.7 miles SSE Blowdown discharge channel from MCR S(1 or 2) WS 242* >10 miles N Colorado River where it intersects Highway 35 Colorado River upstream of Bay City Dam at WVS 243* >10 miles N the Lower Colorado River Authority pumping station WS 247 <1 mile E Essential Cooling Pond F(1,2, or 3) 249* N/A Control sample purchased from a local retailer SO 250 0.75 miles NW Sewage sludge land farning area WG 251 4.0 miles SSE Test Well B4, upper aquifer F(1,2,or 3) CC S2 300 S. . STP Main Cooling Reservoir WW 701 4 miles S MCR Relief Well # 440 Quarterly composite of station #227 and/or Q alternate #233 2N/A Quarterly composite of station #243 and/or WS Q02 N/A alternate #242 MCR-STP Main Cooling Reservoir STP-South Texas Project Media codes typed in bold satisfy collection requirements described in Table 1.

Control Station I - - , --- - -- -- l- -, -- - Z -- - , , -. 1- - --- I- - - I 1-1-I- , K--- ---

STP Nuclear Operating Company 6-18 P6

Radiological Environmental 2004 Radiological Environmental Monitoring Program Analysis Summary An analysis summary for all of the 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 tile sole purpose of reading ease. Only positive values are given in this table.

Media type is printed at tile top left of each table, and tile units of measurement are printed at the top right. The firstcolumiin lists tie type of radioactivity or specific radionuclide for whici each sample was analyzed. Tile second colunin gives the total number of analyses perfomied and the total number of noni-routine analyses for each indicated nuclide. (A noni-r-outine measuiremienit is a sample whose measured activity is greater than the reporting levels for Radioactivity Concenltrationis in Enviroimilenital Samples.)

The "LOWER LIMIITOFDETEC1TION" columini lists the noniral measuremienit sensitivities acilieved which were more sensitive than specified by the Nuclear Regulatory Commission.

A set of statistical parameters is listed for each raedionuclide in the remaining columns. The parameters contain infonrmaitioni fro the indlicaitor locations, the location hiavinlg the highest annual mean, and infor-mationi from the control stations. Some sample types do not have control stations. When this is the case, "no samples" is listed in the contr-ol location column. For each of these groups of data, the follow-illg is calculated:

The mean value of positive 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 dosi meters wvere utilized each quarter for quality purposes. The minimiiumii number of other analyses required by Table I wvere supplemented in 2004 by six surface water samples, two groundwater samples, two drinking water samples, four rainwater samples anl one shoreline sedimelit sample. Fish and vegetation samples vary in numliber according to availability but also exceededtlthe minimii umii number required by Table 1.

_T'ZMON.

- - m-- -e By: Gi enna Ke lto~n Po l'Of, i9' .1

2004 Environmental Report TABLE 3 2004 RADIOLOGICAL ENVIRONNIENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Direct Radiation Units: MilliRocntgen/Standard Quarter ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH 110HEST ANNUAL MEAN CONTROL LOCATIONS TYPE tNONROUTNE LIMIT OF MEAN (f) LOCATION MEAN (0 l MEAN (f)

MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE Gamma 172/0 _ I.4Et0I( 1621 162) ImileW I.9E+01(4 /44) I.6E401( 10/ 10)

( 1.2E+01 - 2.0E401 ) (#013) (1.8E+01 -2.0E+0 1) ( 13E+01 - 1.8E+01 )

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

TABLE 3 2004 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Airborne Radioiodine Units: PicoCuries per Cubic Meter ANALYSIS TOTALANALYSES LOWER INDICATOR LOCATIONS LOCATION WITTH IIIGIIEST ANNUAL MEAN CONTROL LOCATIONS TYPE tNONROUTINE LIMIT OF MEAN (1)' LOCATION MEAN (l)- MEAN (f)-

MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE Iodinc-131 260t0 9.OE-03 -- ( 0/208) --- -- --- ( 01 52)

(,) Number ofpositive measurements / total measurements at specified locations.

TABLE 3 2004 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Airborne Particulate Units: PicoCurics per Cubic Meter ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITII HIIGHIEST ANNUAL MEAN CONTROL LOCATIONS TYPE INONROUTINE LIMIT OF MEAN (f) LOCATION MEAN (I) MEAN (t0 MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE GrossBea 260/0 IAE-03 2.1E-02(2208/208) 14milesNNE 2.2E-02( 52/ 52) 2.OE-02( 52r 52)

(87E-03 -3.9E-02 (#033) (8.7E 3.9E-02) (8.8E-03 -3.7E-02)

Cesium-134 20/0 3.0E-04 -( 0116) -- -( 01 4)

Cesium-137 2010 2.6E-04 -( 0/16) _ ( 0/ 4)

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

Iron-59 20/0 1.6E-04 -- ( 0/ 16) _ _ ( 0/ 4)

Cobalt-58 20/0 4.2E-04 -t 0/ 16) --- --- ( 0/ 4)

Cobalt-60 20/0 3.0E-04 - ( 0/16) - --- ( 0/ 4)

Zinc-65 20(0 7.OE-04 -( 0/ 16) - ( 0 4)

Zirconium-95 20/0 7.9E-04 - ( 0/ 16) - ( 01 4)

Niobium-95 2010 7.5E-04 -- ( 0/16) - -( 0/ 4)

Lanmhanum-140 20/0 4.OE-03 *-- ( 0/ 16) - -( 0/ 4)

Barium- 140 measurements Ittalmeaureentatspe___dlcatons

' )fNumber of posilive measuremenls / 1otalmeasurements usspecited loculions.

STP Nuclear Operating Company 4%

6-20 rwvD-

Radiological Environmental

'IABIL.E 3 2004 RAD)IOLOGICAIL I'R;RA.M 1.NVIONMENTAL RONIO(ItN( ANALYSIS SUMMA..RY Mediu11m: Sull lace Watcr Un:is: PicoCurics per Kilogram YiIS VN.l IO I AL ANAIYSI N I IV.

%HR INI)(AI (R It( / IHI INS IIA H III .11 IN)C 11HSr ANNU Al. MLAN (OHNTIE.ILO.(AI (INS I NAT NI NIII)IIHN 1 IISII l IA SI:.N 11' I (CA 1 ION IRI AN I1W EI AN (U-

%lIIAS ISIItNI IS )Id! IU IR) IN RAN&.I11 I IRMA II1 IN IRAN(;F R.AN(il II rg.( 12:11 2 1 1012 1110 1 4! XI I mk SSSE 961 *(131 4t 4) ... I1 / 4 N 9 1 - I 1 W. -)4 4_I 1 112161 (x ,1W1mII - I 11.1114I (I.-fi I.l(I 42'Il 1D1 1 --- I '2'1I ... ... -- ' I NIel.r.....I-54 42.'1Io 21 11 II / 2 ) -- H- 13 )

lf .,u m.s11 2 (4 -,H ... l 1 2} ... .... ... l t N:is 4211 I 7 1-II...

_1 I c 2 .d. . .. .. "0 1! 1 42 ) I h.01-.l

-2 1 ... . I.1*1I

2) ... : ... ... *-I1 21)04 RAIO42O11 C 1 R31 ,l ... I);A: 2 O9 .I. ... S (11/ 13 S~c.......... 4 2;1 .1) 1 1:1t11 ... II/29I ... ..--- 11113I MliOl.ll...... 42:0 2.01100 .. II/ 329 1- , ... 3 .. I (I11 13 )

I,: dI.........

3 I ' 42:'( 21.0E.01) --- ( 11 2 I') --- --- .-- I (11 13)

I.I.rl i. 147 U

M;InsIsNc 21104 RADIOLO ulcr l -

()GICAL I'0~;.

Es.9t0 1.5001u N,.SIE.N'-'0I.

1m(11..3)...

13IONIT)ING A.NA3LYSIS

-OtA-

SUMMARY

1 0/ 1.)

Melditun:es Drinkinlg

ln'INaII-39 W~ater 26'(Hlcl~lcllllf 5.10.151 -- 1 0/ 13) --- --- Units: PicoCurics --- ( pcr 0/ Khilogrim 13)Zla WIAi.YSIS IOlIALANALN'SFS L(.KlAR INDlIC-ATOR I<XAI ION% UX ATIOWITHI Ifl('ilEST ANNUAL IMCIAN CiONTROLl.OtCATIONS lYIII: 'NONROUIIINF I.LIMIT OF MEAN If)- LOCATION MElAN (1)- N1EAN Mn-NII:ASU.REMLIINS DI1 FlCil UN RAfEINI -)RMATIO)N RANfie RANfil (i-ls Boea 2h'0 1.2E+(,0 26t.1(11) 131 13) 14 nidesNNE 3.013 #00( 13/ 13) 3.o1-f (10( 13 / 13)

It sr 51 3 NE .3X1001 (r#22S) .71-.100 1..... - 46E 4()( I I.,EI(10 - 4.1.E-00) 261 K5ICrgI5 4111.00 2 *-- ( 0 ) --- ... --- ( 0/ 43) 1tdlre 131 26/01 3.sr100 .. (I)1 13) ( 0/ 13) tC~l . .... 134 2h6 10 2t1 1 ( ) 13 )..... --- ( 0/ 13)

.mIn-9 137 2610 21.E%)10 --- ( 0/ 13) --. ... --- ( 0/ 13 )

lanlIIIew-.54 2(' 0 I.sE I(j1 --- I (1/ 13 -) ... .- ( 0 / 13 )

Irwi-59 2 G'(1 S. I (1z - -- (..0/13) ... ... ... (0 /13)I L~hbl~l-ig 2(dl Ill(0 *-( 0/13 )... ... ... I 0/ )3 I C-.bIlt-w 241( 1 91:*00 ...- I 0/ 13 )... ... ... I 0/1 13)

Zhxc-h 26V0 4. 11.00 --- 0/13 )... ... --. ( 0/ 13)

Zlrcno..... I-95 2h/ 0 3.31-00 --- (I 1 1

.1/ ... ... ... 0/ 13)

Niobumi-Y1*5 2W 1) 2 2:-0(1 *--- 0 113) I... ... ... ( / 13) aihm--llull140- 2(V 0 3.21i()0 ... (111 ... --- ... ( 0/ 13)

BIuriunm 140 (I) NI (II pIlc-I IIeC.Islsrc C lia IIC

IIIIHC oSIITCIIHCIIc,I SaIce lied ImmwllrIIs.

,- ' I1 ' I' ' t , P "',:1 1 ; I I ( , 1 1 , I II 06 C , 4-N 6-21

I i

i 2004 Environmental Report TABLE 3 2004 RADIOLOGICAL ENVIRONNIENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Sediment-Shoreline Units: PicoCurics per Kilogram dry weight ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHEST ANNUAL MEAN CONTROL LOCATIONS TYPE INONROUTINE LIMIT OF MEAN (f- LOCATION MEAN (I- MEAN (f0 NIEASUREMEINTS DETECTION RANGE INFORMATION RANGE RANGE Cesium-134 5/0 2.6E+01 ,_ ( 0/ 3) -- -- ( 0/ 2)

Cesium-137 5/0 2.1E401 2.5E+01 ( I/ 3) 6 miles SE 2.5E+01 ( 1 / 3) I.8EE01 ( If 2)

(2.5E+01 -2.5E+01 ) (#227) (2.5E+01 -2.5E+01 ) I.SE+01 - 1.8E+01 Manganesc-54 5/0 2.IEtO1 -_ ( 0/ 3) --- --- --- 0/ 2)

Iron-59 510 7.9E+01 --- ( 0/ 3) _ --- ( 0/ 2)

Cobalt-58 510 2.2E+0I -- ( 0/ 3) -- ( 0/ 2)

Cobalt-60 5/0 2.4E+01 --.- ( 0/ 3) - _ ( 0/ 2)

Zinc-65 5/0 5.212Ol _ ( 0/ 3) _ -( 0/ 2)

Zirconium-95 5/0 4.513+01 _ ( 0/ 3) _ - ( 0/ 2)

Niobium-95 5/0 4.0E+01 _ ( 0/ 3) -- --- ( 0/ 2)

Lanthanum-140 510 I.IE+02 _ ( 0/ 3) -- --- .. ( 0t 2)

Barium- 140

(f) Number of posilive measurements/ total measurements at specified locations.

TABLE 3 2004 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Ground Water (On site test well) Units: PicoCuries per Kilogram ANALYSIS TOTAL ANALYSES LOWER INDICATORLOCATIONS LOCATION WITII HIGHEST ANNUAL MEAN CONTROL LOCATIONS TYPE INONROUTINE LIMIT OF MEAN (f)- LOCATION MEAN (1)- MEAN ((1-MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE Hydrogen-3 6/0 2.6E+02 5.9E+02 ( 5/ 6) 3.8 miles S 5.9E+02 ( 5 / 6) no samples (2.8EtO2 - 1.0E403) (#235) (2.8E+02 -1.OE+03 _

Iodine-131 6/0 9.01E+00 -( 0/ 6 ) _ _ no samples Cesium-134 6/0 2.0E+00 -( 0/ 6) - no samples Cesium-137 6/0 I.9E+00 ( 0/ 6) - o samples Manganese-54 6/0 1.9E+00 --- ( 0 / 6 ) _ - no samples Iron-S9 6/0 5.2E+00 --- ( 0/ 6) _ - no samples Cobalt-58 6/0 1.8E+00 - ( 0/ 6) - nosamples Coball-60 6/0 1.9E+00 - ( 0 / 6) __ _ no samples Zinc-65 6/0 4.5E+00 - ( 0/ 6) --- no samples Zirconiurn-95 6/0 3.3E+00 - ( 0/ 6) --- no samples Niobium-95 6/0 2.5E+00 *- ( 0/ 6) nosamples Lanthanum-140 6/0 4.6E+00 --- ( 0/ 6) _ no samples Barium-140

(f) Number ofpositive measurements / total measuremenls specified at locations.

STP Nuclear Operating Company 6-22 ff_0Z

Radiological Environmental TABLE 3 2004 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Scdimcnt-Bottoni Units: PicoCurics per Kilogram dry weight ANALYSIS TOrAL ANALYSES LO)WLR INDICATOR LOCATIONS LOCATION WITH IhIGHEST ANNUAL MEAN CONTROL LOCATIONS TYIE .NONROLrTINE LIMITOF MEAN If)' LOCATION MEAN Il) MEAN (r)-

MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE Ccsiuim-134 710 3 OE-01 .. ( Ot 7) .. ... o samples Cesiuin-137 710 20)E1O0 9.8101( 41 7) 3 miks SSE #.81E101( 41 4) no1samtlcs (3.7E101 I.SE-02 ) ($1216) t3.7E'01 - I.SE1202)

Nfinginewe-54 7/0 23E101 ( 0/ 7) ... no samplles Iron-59 7/0 8 SE01 -- ( 0/ 7) . --- no samplcs Coball-58 7/0 2.5Ei0I --- 0 / 7) ... 00 no samilcs CoI-alt-60 7/0 2.4E101 X.IEIOIC 4/ 7) 3 miles SSE 8A.1IE.0( 4/ 4) no samples (3 41E(01- 1.5ErIO12 ) #216) ( 3.417+01- 1.5E102 )

Zinc-65 7/0 5.8E10 *-- I 0 / 7) --- ... no samplcs Zirconiutn-95 7/0 5.2POb *-- ( 0/ 7) ... .. no samples Niobium-95 7/0 4.2EO*I ( 0/ 7) ... .. nosamples Lanthanuni-140 7/0 I.E102 * ( 0/ 7) .. --- no samples Ilariuim 140 I 1) Nunilmr orpositive measurenlents / total mscasmirecmel at spec:Ified locations.

I'ABI.E 3 2004 RAI)IOIO)G(ICAI. ENVIR(ON.MIEN'I'AIl :()IONI'I'()RIN(; PROGRANM ANALYSIS

SUMMARY

Mclitnm: lanuana Leaves Units: i'icoCuries pcr Kilogram wet wight ANALYSIS TOTAL ANALYSFS tO(%R INI)ICATOR tIICATIONS LOCATION WITI I hII1FST ANNUAL. MEAN CONTROL LOCATIONS

'IYI: NI IetO10N I IS I I1I ( NI MIAN I)- 1. )CA VION MEAN (Pn MEAN t()

MI ASIRIMIN'I ) t: II ION RANGE INI tRMATION I(AN'It RANGEit)

.Xh 201t 7 XF.-h 0n -- o:0 14 I ... ... ... O / h6l (es iC.n 134 2(1 .71*I(i .-- ( U) 4I ... ... --- t° 6)

Cemwn- 137 20111 2.21.(01 --- I :0 141 ..-- -. --

.. 0 6)

!M..Ilg.Iaew-54 2(t 1 2.5'.1hl -[HI I 14 I ... --- .. -- I I/ 6)

Ir.11m-5 2(11 1.01)1... I (I 1 IU ... ... ... l d (1)

(..l is211 1 2.61 ()(I .. I o: 14 I ... ... ... ( O 6)

('-hb,ilt-.,. 21V0 4.:ZE I (1 --- (I IJ 1 I .. .. -- ( i1 6 I hIle-i c -2z111 7.q: Wo l t--- 0 { 14 I ..... ... ... W 6zI Zirc ni.IIIIII'5 2 1.1 I f.FI0(l --- 1) 14 I -.- ... --- ( 0i 6I Nlolurl-93 ' ) 20!) .(1- 1l)- I4..

-- (1)1 . ... ... 14. I 0 6I L~anlthavurn. 140 ~ 2z./f J) s l1:1(f --- ( 14 IJ .. .. 16

6. I..

IlarlaIll 1401

(I) Nullmbur poSIISc I i..III5I 1,11.11 rIeniSrc IItoaIuIrclIeIIs ;It pecified I,1c4ils.

to S IP \'!, 1 . 1( . : ( i'lil.l6 6-23

2004 Environmental Report TABLE 3 2004 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Cana Leaves Units: PicoCuries er Kilogram wet weight ANALYSIS TOTAL ANALYSES LOWER INDICATORLOCATIONS LOCATION WITH HIGHEST ANNUAL MEAN CONTROL LOCATIONS TYPE INoNROUTINE LIMITOF MEAN (t)' LOCATION MEAN (I)- MEAN (f)-

MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE lodine-131 6/0 I.3E+OI --- ( 01 4) l -( 0/ 2)

Cesium-134 610 2,IE+00 -.- ( 0t 4) _ _ _ ( o0 2)

Cesium-137 6/0 I.7E+00 . ( 0/ 4) --- ( 0/ 2)

Mangancse-54 610 2.0E+OO _- ( 0/ 4) --- ( 0/ 2)

Iron-59 6/0 9.7E+00 - ( 0/ 4) *-- ( 0/ 2)

Cobalt-58 6/0 2.3Et00 ( 0/ 4) --- .O -- ( 0/ 2)

Cobalt-60 6/0 3.4E+00 - /Of4) --- -( 01 2)

Zinc-65 6/0 6.1L'+00 ..-- ( 0 4) - - ( 0/ 2)

Zirconium-95 6/0 4.0E+0O --- ( 0/ 4) -( 0/ 2)

Niobium-95 6/0 2.8E+00 *- ( 0/ 4) . l -( 0/ 2)

Lanthanum-140 6/0 4.8E+00 _- ( 0/ 4) -( 0/ 2)

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

TABLE 3 2004 RADIOLOGICAL ENVIRONNIENTAL MONITORING PROGRAM ANALYSIS SUMMIARY Medium: Collard Greens Units: PicoCuries per Kilogram wet weight ANALYSIS TOTAL ANALYSES LOWER iNDICATOR LOCATIONS LOCATION WITH IiIGIIEST ANNUAL MEAN CONTROL LOCATIONS TYPE INONROUTINE LIMIT OF MEAN (f)- LOCATION MEAN ()' MEAN (f)-

MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE lodine-131 6/0 8.2E+00 --- ( 0/ 4) _ __ -( 0/ 2)

Cesium-134 6/0 1.2E00 ,-- ( O/ 4) _ . ( 0/ 2)

Cesium-137 6/0 9.8E-01 --- ( 0/ 4) -

--- --- ( 0 2)

Manganese-54 6/0 I.IE+0O -( 0/ 4) . _- ( 0/ 2)

Iron-59 6/0 5.5E400 ( 014) f .-. _ ( 0 2)

Cobalt-58 6/0 1.3E+00 -( 01 4) ._ -( 01 2)

Cobalt-60 6/0 1.9E+00 --- ( 0 4) - -- 0/2)

Zinc-65 6t0 3.4E+00 --- ( 0/ 4) - Of 2)

Zirconium-95 6/0 2.3E+00 --- ( 0/ 4) - _ ( 0 2)

Niobium-95 6/0 1.7E+00 - ( 0/ 4) - ... --- ( 0 2)

Lanthanum-140 6/0 2.7E400 _ ( 01 4) ._ ... ( 0/ 2)

Barium-140 (f Number of positive measurements/ total measurements at specified locations.

STP Nuclear Operating Company 6-24 PIZD

Radiological Environmental TABLE 3 2004 1ADI)IOIO)ICAI. ENVIR(ON.MIEN'rAI, MOI(NITORIING PROGRAMI ANALYSIS SUMIMIARY Medium: Fish - Piscivorous Units: PicoCurics r Kilogram wet weight ANALYSIS TOTAL ANALYSI:S R.( INIICA FOR L(Ki'A'IOKNS I (K'A I)N a 1111IIltAl 11.ST ANNUAI. MEAN C(N1 K)L LOCA'I'IONS TYITE N(JNR()IUTINE I.IIITtIF MEAN ti, ItOCATION MEAN (f- MEAN If)-

ME.ASUREMENTS D)EIAC1I3)N RANil: INFORMATION RANC;E RANGE Ccsicmu-134 9!tl 3 2[I0 .-- (1( 5 ) ... ... ... 11 4)

(Csiim.-137 9/0 3.0E.01 ... tl ,. .) --- 0/ 4)

NMangaeisc-54 9/1) 31.0t1i0 --. . / 5) . .,. *-- I 0/ 4)

Iron-59 Wo 9.5E'01 *--- 0/ 5 -( 4)

Cobalt-58 9t0 3.2E101 ._ ( 1 5) .. ... ---. ( 0/ 4)

Cobalt-60 9!0 3.4E101 -.- 0/ 5) ... ... .( 01 4)

Zinc-65 9!0 6.6E 1 *--- 55 ( 0/ 4)

Zirconjtiu-95 9/0 5.SE't0 1 ... 3 (/ 5) ... ... -- ( 0/ 4)

Nlobi1hi-95 9/(1 3.lE,ItI ( 0/ S. --- ( 0/ 4) 4

iatlithantu11. 1 () 9'(1 7.51 01 ... (it 5) .. --- 3 0/ 4) am- 4140 aIr~i

() Nuimbcr 0t'po.ittvc ncalkrcilucnts I ImtalimeasuIrciltens at pecified IocatimiXs.

TABLE 3 2004 RAI)IOLOGICAL ENNVIRONM.IENT'AL .MONITOI )RING PROGRLAMI ANALYSIS

SUMMARY

Medium: Cnstacean Shrimp Units: PicoCuries per Kilogram wet weight ANALYSIS TOTAL. ANALYESI:S LOaFR INI)lCATll)R ltIKAll/)NS I.O('A'cI(ON wI li IiIIIlsr ANNllAL MlIAN CONTRO)L I.OCATI)NS I YIE NI IN()(lOiINI ILIMII ( !,II:AN 0) It AlitION MIEAN (l- NMEAN(t)

%FIEASI ((3MENIS D)l:lI .Cl ION RANGE INH)RNIA'I ION RANW-' RANGil.

ICoium.i 134 Sl .Eo*- 13)... ... --- o0 2)

Ccsiamn 137 5/0 2.7E'03 --- ( o/ 3) ... ... --- o1 I 2)

%Ianganoc-54 5/1I 2.7M(tI3 *--

. 3I) ... .-- I 31/ 2)

Iron-lS- 5t1( 71 {l( ... (111! 3I) ... ... ... ( I12)

Cubalt-58 5/0 2.(1EiO0 ... ( )/ 3) --- ( 11/ 2)

Cobalt-hO 5$1) 2.9EI01 .. ( O/ 3 ... ... .. ()/ 2)

Zintc-05 5tl iXSFNI *-- ( 01 ... ... --- ( O/ 2) htrctltm-9t5 50 4.7EI((l .. 3 / 3--- 3 --- ( 1 2)

Ntobihii-95 5/ti 3OEOI -- (

... 1) .-- 0/ 2) tantharttim-140) 5!0 5.3E'01 *-- 3) (11 , ... . .3t .. 3 2)

(3) Nuimiber o1l ... Iifi Ic atflcI1Is' ll) IttcasuIcicinlets a3Npecified IcatioN..

4 Ii'P \ .. 1.,, ( )3 ' I I I\

C-i q-N 6:25

2004 Environmental Report TABLE 3 2004 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium- Fish - Crnstacean & Insiect Feedpers UTnits: PirnCiries ner ilneram wet wisht ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITm HIGHEST ANNUAL MEAN CONTROL LOCATIONS TYPE INONROUTINE LIMrTOF MEAN (fl- LOCATION MEAN (f)- MEAN (f)-

MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE Cesium-134 3/0 3.3E+01 -- t 0/ 3) .-- nosamples Cesium-137 3/0 2.9E+01 --- ( 0/ 3) nosamples Manganese-54 3/0 2.9E+01 - ( 0/ 3) .. . nosamples Iron-59 3/0 1.0E+02 - t 0/ 3) no samples Cobalt-58 3/0 3.2E+01 -- ( 0/ 3) _.. no samples Cobalt-60 310 3.3E01 --- ( 0/ 3 ) --- no samples Zinc-65 3/0 6.8E+01 --- ( 0/ 3) _ no samples Zirconium-95 3/ 0 5.8E+0 --- ( 0/ 3 ) --- no samples Niobium-95 3/0 4.OE+01 ( 0/ 3 ) --- --- no samples Lanthanum-140 3/0 9.8E+0I ( 0/ 3) nosamples Banum-140 I (f) Number of positive measurements / total measurements at specified locations.

TABLE 3 2004 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANALYSIS

SUMMARY

Medium: Beef Meat Units: PicoCuries per Kilogram wet weight ANALYSIS TOTAL ANALYSES LOWER INDICATOR LOCATIONS LOCATION WITH HIGHEST ANNUAL MEAN CONTROL LOCATIONS TYPE /NONROUTINE LlMITOF MEAN (f)- LOCATION MEAN (f)- MEAN (f)-

MEASUREMENTS DETECTION RANGE INFORMATION RANGE RANGE Cesium-134 2t0 2.4E+01 - t 01 2) _ _ no samples Cesium-137 2/0 2.2E+01 --- ( 0/ 2) _ no samples Manganese-54 210 2.3E+0I1 ( 0/ 2) --- --- no samples Iron-59 2/0 I.IE+02 -- ( 0/ 2) --- nosamples Cobalt-58 210 2.9E+01 --- t 0/ 2) _ no samples Cobalt-60 2/0 2.7E+01 --- ( 01 2) no samples Zinc-65 2/0 5.6E+0l --- ( 0/ 2) ... nosamples Zirconium-95 2/0 5.5E+01 --- 0/ 2) --- -.- nosamples Niobium-95 2/0 4.6E+01 -- 0/ 2) _ ... no samples Lanlisanum-140 2V0 2.1E+02 -.. ( 01 2) _ _ nosamples Barium-140

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

STP Nuclear Operating Company 6-26 0%

iT

NOC-AE-05001881, 2004 Annual Environmental and Annual Radiological Environmental Operating Reports

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