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: <br /> 15 <br /> n <br /> E ®NY, <br /> COMPANU.S.A77210-4382 <br /> 3E <br /> t'�ILL�,�?�fJJIIr3�i ' <br /> RETAIL 9U51NE55 CENTER - <br /> FkFF ,7� <br /> July 18, 1986 <br /> ENV1R0mEN.,rAL HEALTH <br /> F EW I T/SERVICES <br /> Ms. Laurie Cotulla <br /> San Joaquin Local Health District <br /> post Office Box 2009 <br /> Y' <br /> „5 Stockton, California 95201 <br /> Exxon Service Station 7-1050 <br /> 909 W. Hammer Lane <br /> IN Stockton, California 95207 <br /> 63 <br /> 7 <br /> i Dear Ms. Cotulla: <br /> As you requested, attached is a report of our subsurface investigation <br /> conducted at the above site. Six soil samples were taken from the tank <br /> excavation areas and analyzed for Total Volatile Hydrocarbons. The maximum <br /> A7 concentration of 4600 ppm was found in a sample taken from below the central <br /> fuel . storage tank. This contamination, however, <br /> is localized and appears to 1 <br /> ii be a result of overflow during filling. Representatives from your office and 1 <br /> onsultants, determined that excavation of rt <br /> Groundwater Technology, Inc. ,, our <br /> this minor amount of cont200nated soil was unneressary <br /> Since no hydrocarbons were detected in any boreholes around the tank pit, the <br /> contamination appears to be limited, to the backfill area of the original tank <br /> locations. Considering the limited extent and minor amounts of contamination, <br /> the significant thickness of clay layers underlying the site and the depth of <br /> the. groundwater, the possibility for migration of hydrocarbon products to the <br /> groundwater is very remote. <br /> 96' <br /> F <br /> Sincerely, # <br /> Robert M. Owens <br /> Environmental Engineer <br /> y l , <br /> t RMO:eaf <br /> Attachment <br /> cc: w/o attachments <br /> r R. W. Dennis , <br /> g S. D. Hoffman <br /> zY L,. �I.: Lindee� ' <br /> A. Sager Groundwater Technology l <br /> ,. <br /> - - A OIYISION OF EXXON CORPORATION <br /> r ';r <br /> I ' � <br /> 1, <br /> S. <br /> J_ <br />