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.r <br /> GROUND ZERO ANALYSIS, INC. <br /> J <br /> 1714 Main,Street <br /> E"on,Cald6nua 95320-1927 <br /> Telephone (209)838-9888 <br /> Fwshnde (209)838-9883 <br /> April 4, 2000 <br /> Ms Lori Duncan <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 1 <br /> 4l <br /> Subject Additional Subsurface Investigation Summary Report <br /> 640 N El Dorado Street, Stockton, California <br /> Site Code 1090 <br /> Dear Ms Duncan <br /> Ground Zero Analysis, Inc (Ground Zero) submits this Additional Subsurface Investigation Summary <br /> Report on behalf of Mr Gene Gabbard to summarize additional subsurface investigation activities <br /> conducted at the subject property(Figure 1) <br /> INTRODUCTION <br /> Purpose <br /> The purpose of this investigation was to further investigate the lateral and vertical extent of soil and <br /> groundwater contamination by an unauthorized release of waste oil from the former underground <br /> storage tank(UST)located at the facility <br /> Resources <br /> Sean Garvey, a Ground Zero geologist, directed field work on October 26 and 27, 1999 Fisch- <br /> Environmental (Fisch), a State licensed drilling company (C-57-683685), performed drilling services <br /> McCampbell Analytical Laboratories, Inc (McCampbell), a State certified hazardous waste testing <br /> laboratory(ELAP#1282), completed the laboratory analyses for all samples <br /> BACKGROUND INFORMATION <br /> Site Description <br /> The site previously operated as an automotive sales and service center and utilized one 250-gallon UST <br /> for storage of waste oil The former UST was located approximately 100 feet south of the Park Street <br /> groundzelgabbardladd_bonng_rpt doc <br />