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I <br /> i <br /> STATE OF CALIFORNIA <br /> GEORGE DEUKMEJIAN,Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL B II�� <br /> CENTRAL VALLEY REGION <br /> J�id �. ^ <br /> 3443 ROUTIER ROAD `4 <br /> SACRAMENTO,CA 95827-3098 <br /> FEa 23 iG <br /> 21 February 1989 <br /> Mr. Richard C. Ragaini , Department Head I'Eil'MI7/�'-��t��ES <br /> Enviornmental Protection Department <br /> University of California <br /> Lawrence Livermore National Laboratory <br /> Post Office Box 808 <br /> Livermore, CA 94450 <br /> SOLID WASTE ASSESSMENT TEST REPORT, LANDFILL PIT 6, LAWRENCE LIVERMORE NATIONAL <br /> LABORATORY SITE 300, SAN JOAQUIN COUNTY (CASE #2677) <br /> I have reviewed your 18 January 1989 response to my 6 December 1988 comments on <br /> the I July 1988 report en <br /> 1411e, °Jol T ` <br /> u ,� id �dS�e Assessment ies� (SWAT) , Inactive Pit <br /> 6, Lawrence Livermore National Laboratory Site 300". <br /> The SWAT report provides the results of the sampling and analysis of monitoring <br /> wells (MW) surrounding the landfill . These data, obtained over several years, <br /> are sufficient to demonstrate reliably whether the landfill is leaking hazardous <br /> waste into the ground water. MW sampling and analyses have detected hazardous <br /> constituents, mainly trichloroethylene, in downgradient wells. The report <br /> concludes that this TCE has probably leaked from the landfill . <br /> In addition, the SWAT report presents the analyses of soil samples taken during <br /> the drilling of MW K6-19 which is located directly downgradient from the landfill <br /> near its toe in an area likely to be affected by leaking hazardous waste. Both <br /> the soil and ground water samples contained chemical constituents, mainly TCE, at <br /> levels below the applicable hazardous waste threshold limit concentrations <br /> specified in the California Code of Regulations Title 22, Division 4, Chapter 30, <br /> Section 66699. <br /> Based on the information provided in the report, I conclude that wastes in <br /> hazardous concentrations have not leaked from the landfill Pit 6. However, the <br /> landfill has leaked TCE and polluted the ground water, which will have to be <br /> cleaned up. <br /> If you have comments or questions regarding this matter, please call me at (916) <br /> 361-5653. <br /> r �e <br /> ICHAEL L: H S <br /> Project Engineer <br /> MLH:ej <br /> cc: Mr. James T. Davis, U.S. Department of Energy, Oakland <br /> Department of Health Services, Toxic Substances Control Division, Berkeley <br /> (San Joaquin Local Health District, Stockton <br /> Mr. Eugene Draney, Lawrence Livermore National Laboratory, Livermore <br /> Mr. Fred Hoffman, Lawrence Livermore National Laboratory, Livermore <br />