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i <br /> Z1 INC <br /> 1.0 INTRODUCTION <br /> i <br /> 1.1 Executive Summary <br /> Hydrocarbon and chlorinated hydrocarbon compounds were discovered in shallow soil <br /> during a site characterization investigation at the Lustre-Cal Nameplate Corporation (LCN) <br /> t Lodi Facility A previous Preliminary Site Assessment investigation was conducted by <br /> The Mark Group (TMG) during 1992 under direction of the California Department of <br /> Health Services, Department of Toxic Substance Control (DTSC) Low to moderate <br /> concentrations of Total Petroleum Hydrocarbons as diesel (TPH-D), gasoline (TPH-G), <br /> and oil and grease (O&G) related to an uncontrolled release from a concrete <br /> underground storage tank were determined to be present by the TMG 1992 investigation <br /> to a maximum depth of 35 feet In addition, trace amounts of chlorinated hydrocarbon <br /> compounds such as 1,1,1 trichloroethane and trichloroethene were also found to be <br /> present <br /> The results of the TMG 1992 investigation indicated that additional site characterization <br /> would be required in order to determine the lateral and vertical extent of hydrocarbon- <br /> impacted soil at the site Chlorinated hydrocarbon compounds were fudged to not be <br /> a threat to the public health by DTSC staff and oversight for the Lustre-Cal site was <br /> transferred to San Joaquin County Local Health District (SJCLHD) for completion of site <br /> assessment related to soil hydrocarbon contamination related to the concrete tank and <br /> closure of the tank Additional subsurface geologic and analytical data was acquired by <br /> drilling and exploratory excavation by WZI Inc during July and August 1993 <br /> f <br /> Site Characterization activities conducted by WZI Inc to assess soil impacted by <br /> hydrocarbon and chlorinated organic compounds consisted of 1) one inclined soil boring <br /> and two vertical soil borings adjacent to the concrete tank that were advanced to a total <br /> depth of 47 feet below ground surface, 2) three shallow soil borings to a maximum depth <br /> of 16 5 feet below ground surface at Area "D" where previous data indicated trace to <br /> �J <br /> minor hydrocarbon and chlorinated hydrocarbon compounds were present in the shallow <br /> 12270010 013 Page 1 <br />