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Title: Remedial investigation of contaminant mobility at Naval Weapons Station, Concord, California
Authors: United States. Naval Facilities Engineering Command. Western Division
Lee, Charles R.
O'Neil, L. Jean
Clairain, Ellis J., Jr.
Brandon, Dennis L.
Rhett, R. Glenn
Sanders, Dana R., Sr.
Skogerboe, John G.
Kay, Stratford H.
Folsom, Bobby L.
Wakeley, James S., 1950-
Roberts, Thomas H.
Saddler, Karen M.
Kendall, David R.
Lunz, John D.
Keywords: Arsenic
Remedial investigation
Contaminant mobility
Upland contamination
Endangered species
Wetland contamination
Metal contamination
Plant bioassays
Animal bioassay
Soil pollution
Naval Weapons Station
Publisher: Environmental Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; EL-86-2.
Description: Miscellaneous Paper
Abstract: A remedial investigation was conducted at Naval Weapons Station, Concord, California, to determine the nature and extent of contamination of wetland and terrestrial environments. The evaluation considered major pathways of contaminant migration including soil, water, air and biota. Major testing was conducted on soil and the biological components of the pathways. Chemical analysis of soil samples indicated substantial elevation in arsenic, cadmium, lead, selenium, zinc and copper in certain contaminated areas. Field conducted clam bioassays showed a moderate potential for lead, cadmium and zinc to bioaccumulate in clams placed in surface waters of a limited number of sampling sites. Plant and earthworm bioassays indicated substantial movement of arsenic, cadmium, lead, selenium, zinc and copper into plants and soil-dwelling organisms in contaminated areas. A definite threat of these contaminants to impact wildlife, especially the endangered species that inhabit the contaminated sites, was strongly suggested by the toxicological effects of these metals on birds and mammals. A hydrological evaluation indicated substantial movement of hazardous substances into surface waters during storm events and high tides. A comprehensive evaluation of natural resources indicated that the wetland areas have moderate to high functional values for wildlife habitat, food chain support, flood storage, shoreline anchorage, sediment trapping, nutrient retention and passive recreation and heritage. A habitat evaluation for selected wildlife species indicated high to moderate potential value of upland areas and ranged from good to poor for California black rails and from moderate to poor for salt marsh harvest mice within the contaminated wetland areas. The results of this remedial investigation will be the basis for a feasibility study of remedial actions and an assessment of damage to natural resources. NOTE: This file is very large. Allow your browser 5-10 minutes to open the file.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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