Area 5 Site characterization project report, FY 1994

Albright, William H.; Tyler, S. W.; Chapman, J. I.; Miller, Martin C.; Estrella, R.

doi:10.2172/10111974

Cited by 3 publications

(3 citation statements)

References 4 publications

(4 reference statements)

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“…Several studies and models have been completed to characterize the stratigraphy and physical properties of the unsaturated zone in Area 5, the physical properties of the existing operational covers, and the potential for movement of water through the vadose zone (Albright et al, 1994;Blout et al, 1995;BN, 2005b;BN, 2005c;BN, 2005e;REECo, 1993a;REECo, 1993b).…”

Section: Vadose Zonementioning

confidence: 99%

Closure Report for the 92-Acre Area and Corrective Action Unit 111: Area 5 WMD Retired Mixed Waste Pits, Nevada National Security Site, Nevada

2012

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Section: Vadose Zonementioning

confidence: 99%

Closure Report for the 92-Acre Area and Corrective Action Unit 111: Area 5 WMD Retired Mixed Waste Pits, Nevada National Security Site, Nevada

2012

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“…Disposal units within the Area 5 RWMS are protected from offsite flooding events by a RCRA-compliant berm and channel system capable of conveying flood flows from a 25-year, 24-hour storm event. Several studies and models have been completed to characterize the stratigraphy and physical properties of the unsaturated zone in Area 5, the physical properties of the existing operational covers, and the potential for movement of water through the vadose zone (Albright et al, 1994;Blout et al, 1995;BN, 2005b;BN, 2005c;BN, 2005e;REECo, 1993a;REECo, 1993b).…”

Section: Surface Watermentioning

confidence: 99%

Corrective Action Decision Document/Corrective Action Plan for the 92-Acre Area and Corrective Action Unit 111: Area 5 WMD Retired Mixed Waste Pits, Nevada National Security Site, Nevada

2010

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“…Most of the calcium and magnesium present is from the dissolution of limestone and dolomite (CaCO 3 and CaMg [CO 3 ] 2 ) mineralization in the unit as it conducts flow. Water of the mixed facies (III contains portions of both the Na-K and Ca-Mg ions groups (Chapman, 1994 (BN, February 2003) indicates the groundwater pumped from the three wells immediately surrounding the Area 5 RWMS is sodium bicarbonate water. Wells Ue5PW-1 and Ue5PW-2 are completed in the alluvial aquifer and Ue5PW-3 to the northeast is completed in the Timber Mountain Tuff Aquifer.…”

Section: Groundwater Chemistrymentioning

confidence: 99%

Characterization Report for the 92-Acre Area of the Area 5 Radioactive Waste Management Site, Nevada Test Site, Nevada

Nevada¹

2006

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Office (NNSA/NSO) manages two low-level Radioactive Waste Management Sites (RWMSs) at the Nevada Test Site (NTS). The Area 5 RWMS uses engineered shallow-land burial cells to dispose of packaged waste. This report summarizes characterization and monitoring work pertinent to the 92-Acre Area in the southeast part of the Area 5 RWMS. The southeast quadrant covers 37 hectare (ha) (92 acres [ac]), and is referred to as the "92-Acre Area."The cells in the 92-Acre Area include 13 boreholes, 16 narrow trenches, and 9 broader pits. The waste disposal units were gradually established during 45 years of waste operations. Only three disposal units within the 92-Acre Area are currently active. Most of the disposal units have been operationally closed with covers of at least 2.4 meters (m) (8 feet [ft]) of native fill. Closure of the 92-Acre Area disposal units is anticipated by 2011.Current closure plans organize the disposal cells of the 92-Acre Area into six closure units by physical location, waste types, and regulatory requirements. One of these closure units is Federal Facility Agreement and Consent Order Corrective Action Unit (CAU) 111: Retired Mixed Waste Pits. The CAU 111 pits and trenches were operated prior to the promulgation of the Resource Conservation and Recovery Act (RCRA) and may have received both low-level waste (LLW) and low-level mixed waste (LLMW). A proposed single final closure cover and a monitoring plan will meet the needs of all six closure units within the 92-Acre Area. Studies indicate a monolayer soil cover will provide the equivalent protection of a standard RCRA cover, and offer superior performance with respect to subsidence.The precursor to the Area 5 RWMS, the Sugar Bunker Dump, began receiving waste by 1960 and began burying waste in January 1961. The Area 5 RWMS was established in 1978 on a 296 ha (732-ac) site incorporating the existing Sugar Bunker Dump waste cells in the southeast corner. The thirteen 37-m (120-ft) boreholes were drilled in the 1980s for the Greater Confinement Disposal (GCD) program. The GCD program was terminated before all the boreholes were used.Both classified and unclassified materials are managed at this facility. Unclassified disposal records and historic records indicate waste types in the 92-Acre Area include LLW, LLMW, asbestiform waste, transuranic (TRU) waste, and mixed TRU waste. Most of the inventory is LLW, and much of the LLW contains radionuclides that will decay significantly over the next several decades. Most of the TRU and potential mixed TRU waste is in boreholes over 21 m (70 ft) below ground surface. Thorium waste is present in the lowest tier of one disposal pit. Two disposal units have been designated for asbestos waste. Much of the suspected LLMW was deposited at the oldest disposal units prior to the promulgation of RCRA. The contaminants are not readily released or transported, due to the structure (such as lead shielding). The waste acceptance criteria, packaging requirements, monitoring, and other factors in the operation of the interi...

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Area 5 Site characterization project report, FY 1994

Cited by 3 publications

References 4 publications

Closure Report for the 92-Acre Area and Corrective Action Unit 111: Area 5 WMD Retired Mixed Waste Pits, Nevada National Security Site, Nevada

Closure Report for the 92-Acre Area and Corrective Action Unit 111: Area 5 WMD Retired Mixed Waste Pits, Nevada National Security Site, Nevada

Corrective Action Decision Document/Corrective Action Plan for the 92-Acre Area and Corrective Action Unit 111: Area 5 WMD Retired Mixed Waste Pits, Nevada National Security Site, Nevada

Characterization Report for the 92-Acre Area of the Area 5 Radioactive Waste Management Site, Nevada Test Site, Nevada

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