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h.. MAR 29 € <br /> Harding Lawson Associates <br />' I <br /> I <br /> March 25, 1993 <br /> 23343 001 <br /> Mr. Peter Meier ' <br /> John Breuner Company i <br /> 3250 Buskirk Avenue <br /> .Pleasant Hill, California 94523 <br /> Request for Site Closure <br /> Breuners Facility <br /> 7676 Pacific Avenue <br /> Stockton, California <br /> Dear Mr. Meier: <br /> This report presents Harding Lawson Associates' request to the San Joaquin County <br /> Environmental Health Department (SJCEHD) for case closure for the Breuners facility at <br /> � , I <br /> 7676 Pacific Avenue, Stockton, California. An area topographic map is presented on <br /> tvl <br /> Plate 1. i <br /> This report is in:response to a letter from the SJCEHD requesting submittal of a final <br /> remediation plan.(FRP) prior to site closure. As a basis for site closure, this report <br /> presents the results of soil excavation and sampling performed at the site in June 1991 and <br /> details of work performed to meet the FRP guidelines for site closure. <br /> SITE BACKGROUND <br /> In 1989, a 10,000-gallon underground storage tank (UST), product piping, and dispenser <br /> island were removed from the site. Of seven soil samples collected following UST and <br /> product piping removal, only the sample collected beneath the dispenser island contained <br /> detectable concentrations of petroleum hydrocarbons. (Ethyldibromide detected in,`.,ather <br /> soil samples was attributed to former agricultural practices in the site vicinity.). 1 <br /> 1 <br /> in July 1991, HLA conducted an investigation to further evaluate the extent and"presence <br /> of pptroleum hydrocarbons in soil in the vicinity of the former dispenser island. Soil that <br /> exhibited elevated organic vapor readings or was visibly discolored was excavated using a <br /> backhoe. Excavated soil was stockpiled onsite and sampled. When it appeared that <br /> impacted soil had been removed, seven confirmation samples were collected from the <br /> floor and walls of the excavation. Soil samples were analyzed for total petroleum <br /> hydrocarbons (TPH) as gasoline,' diesel, and motor oil, and'for benzene, toluene, <br /> ethylbenzene, and xylenes (BTEX). <br /> On the basis of analytical results, it appeared that the majority of soil containing <br /> detectable concentrations of petroleum hydrocarbons had been removed by excavation, <br /> and that no significant levels of petroleum hydrocarbons remained onsite. Results of the <br /> Engineering and 7655 Redwood Boulevard. RO Box 578, Novato, CA 94948 4151892-0821 <br /> I <br /> Environmental Services A Subsrdan•fHaiding Asstxiates•Offices Nationwide <br /> r <br />