Corrective Action Investigation Plan for Corrective Action Unit 266: Area 25 Building 3124 Leachfield, Nevada Test Site, Nevada, Revision 1, February 1999
The Corrective Action Investigation Plan for Corrective Action Unit 266, Area 25 Building 3124 Leachfield, has been developed in accordance with the Federal Facility Agreement and Consent Order that was agreed to by the U.S. Department of Energy, Nevada Operations Office; the State of Nevada Division of Environmental Protection; and the U.S. Department of Defense. Corrective Action Unit 266 consists of the Corrective Action Site 25-05-09 sanitary leachfield and associated collection system. This Corrective Action Investigation Plan is used in combination with the Work Plan for Leachfield Corrective Action Units: Nevada Test Site and Tonopah Test Range, Nevada (DOE/NV, 1998d). This Corrective Action Investigation Plan provides investigative details specific to Corrective Action Unit 266. Corrective Action Unit 266 is located southwest of Building 3124 which is located southwest and adjacent to Test Cell A. Test Cell A was operational during the 1960s to test nuclear rocket reactors in support of the Nuclear Rocket Development Station. Operations within Building 3124 from 1962 through the early 1990s resulted in effluent releases to the leachfield and associated collection system. The subsurface soils in the vicinity of the collection system and leachfield may have been impacted by effluent containing contaminants of potential concern generated by support activities associated with Test Cell A reactor testing operations, various laboratories including a high-level radioactivity environmental sample handling laboratory, and possibly the Treatability Test Facility. Based on site history collected to support the Data Quality Objectives process, contaminants of potential concern for the site include radionuclides, oil/diesel range total petroleum hydrocarbons, and Resource Conservation and Recovery Act characteristic volatile organic compounds, semivolatile organic compounds, and metals. Samples will also be analyzed for radionuclides and polychlorinated biphenyls not considered during the DQO process. Additional samples will be analyzed for geotechnical and hydrological properties and a bioassessment may be performed. The technical approach for investigating this Corrective Action Unit consists of the following activities: Perform a radiological walkover survey. Perform video and radiation surveys of the discharge and outfall lines. Collect samples from within the septic tank. Mark approximate locations of leachfield distribution lines on the ground surface. Collect subsurface soil samples in areas of the collection system including the septic tank and outfall end of the diversion chamber. Collect subsurface soil samples underlying the leachfield distribution pipes. Field screen samples for volatile organic compounds and radiological activity. Drill boreholes and collect subsurface soil samples if required. Analyze soil samples for total volatile organic compounds, total semivolatile organic compounds, total Resource Conservation and Recovery Act metals, total petroleum hydrocarbons (oil/diesel-range organics), and polychlorinated biphenyls. Analyze a minimum of 25 percent of the soil samples for gamma-emitting radionuclides, isotopic uranium, isotopic plutonium, isotopic americium, and strontium-90 if radiological field screening levels are exceeded. Collect samples from native soils beneath the distribution system and analyze for geotechnical/hydrologic parameters. Collect and analyze bioassessment samples at Site Supervisors discretion if volatile organic compounds exceed field-screening levels. Additional sampling and analytical details are presented.
- Research Organization:
- International Technologies Corporation, Las Vegas, NV (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 6319637
- Report Number(s):
- DOE/NV-529-REV 1; ON: DE00006190
- Country of Publication:
- United States
- Language:
- English
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