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Page : 457 pages
File Size : 20,45 MB
Release : 1991
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Page : 320 pages
File Size : 48,84 MB
Release : 1991
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Page : 1400 pages
File Size : 33,52 MB
Release : 1992
Category : Government publications
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Page : 624 pages
File Size : 43,6 MB
Release : 1992-04
Category : Science
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Page : 1084 pages
File Size : 18,85 MB
Release : 1990
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This cost analysis and environmental impact report presents the results of a comparative analysis of removal action options for the McClellan AFB Operable Unit B. This report documents the removal action selection process and presents the actions selected to mitigate the groundwater. Partial contents: Type of facilities and operational status; Soils; Surface water; Groundwater; Land use; Use, storage, and disposal of chemicals; Potential and known discharges; Contamination distribution; Potential health or environmental impacts; Exposure assessment; Toxicity assessment; Risk characterization; Removal scope; Ground/water extraction; Groundwater treatment plan; Industrial wastewater treatment plan; Sanitary sewer system; Reinjection of treated groundwaters into aquifer; Groundwater monitoring; Analysis of removal action alternatives.
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Page : 54 pages
File Size : 46,86 MB
Release : 1991
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The purpose of this action memorandum is to document approval of a ground water removal action in Operable Unit (OU) B of McClellan Air Force Base (AFB), California. The removal action abates the impacts of contaminated ground water in specific areas of OU B. Operable Unit B is the southwestern portion of McClellan AFB, and extends off-base. The impact to public health and environmental impact caused by contaminants in OU B, including soil, soil gas, and other areas of ground water contamination, will be addressed in the OU B remedial Investigation/Feasibility Study. Investigations of the ground water found contamination migration toward two water supply wells. Three contaminant plumes have been identified, based on composition of contaminants and historical ground water flow direction. The contaminants in the ground water are mostly volatile organic compounds that were used in industrial processes at McClellan AFB. The sources of the contaminant plumes are currently unknown. Ground water contamination is primarily the result of waste disposal practices. Contamination of soils has been confirmed at six sites and three study areas in OU B.
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Page : 375 pages
File Size : 12,91 MB
Release : 1991
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This document presents a summary of data compiled during the McClellan AFB Operable Unit B Soil Gas Investigation, including results of all field activities and recommendations for further investigation of 40 Sites, Potential Release Locations, Study Areas, and Special Study Areas in Operable Unit B. Soil gas sampling and analysis was used as a screening tool to identify areas where shallow soils and soil gas have been contaminated with volatile organic compounds. A total of 41 sites were investigated.
Author : RADIAN CORP SACRAMENTO CA.
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Page : 6 pages
File Size : 22,9 MB
Release : 1991
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The Department of the Air Force has prepared an Engineering Evaluation/Cost Analysis and assessment of environmental impact to respond to contaminated ground water in Operable Unit (OU) B at McClellan AFB, California. Proposed action involves: (1) installation of extraction wells; (2) extraction of contaminated ground water; (3) treatment of extracted groundwater; and (4) release of the treated groundwater. Additional ground water monitoring, abandonment of a contaminated production well, continued extraction from a production well, and restriction on the use of a third production well are also proposed as integral parts of the restoration and water reclamation activity. This action only covers short-term measures to reduce the potential for increased health risks from the migration of higher concentrations of contaminants to on- and off-base water supply wells.
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Page : 272 pages
File Size : 15,9 MB
Release : 1990
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This Data Summary presents the results of groundwater sampling activities conducted on and in the vicinity of McClellan Air Force Base from the sampling period of January through March 1990. Concentrations of purgeable halocarbons and aromatic compounds detected in 49 wells (39 monitoring wells and 10 extraction wells) exceeded state and/or federal drinking water standards. These wells are located on-base in Areas A, B, C, D and adjacent on-base areas and off-base in the Northwest and Southwest areas. The Area D extraction system is effectively operating to change hydraulic gradients, so groundwater in Area D flows toward the extraction wells. Samples from two middle zone monitoring wells located in Area D also show decreases in contaminant concentration during this sampling period. Decreasing contaminant concentrations have stabilized in shallow zone monitoring wells located off-base, west of Area D.
Author : R. W. Bauer
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Page : 256 pages
File Size : 27,24 MB
Release : 1985
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The United States Air Force (USAF) is currently engaged in a program to identify and mitigate impacts resulting from past solid waste handling and disposal procedures at their facilities. This program is known as the Installation Restoration Program (IRP) and is composed of four phases. Phase II is a confirmation of the existence or absence of contamination which is divided into Stage 1 (qualitative) and Stage 2 (quantitative) investigations. This report defines the activities completed in Phase II, Stage 2-1 at McClellan Air Force Base California. It is divided into two volumes.
