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�P 1 <br /> f� <br /> �- P6 <br /> GROUNDWATER �AAY ! g 1961 <br /> ❑� TECHNOLOGY <br /> Consulling Gfoundwular Gan709fsls ENViROMENTAI, NF�ll�, <br /> fi nivisiml of Gil Recovery 5yslerns,Inc f MJTeICCS <br /> 5047 CLAYTON ROAD-CONCORD,CA 94521-(4.3)671-2307 <br /> May 15, 1986 <br /> Dave Lewis <br /> 7-Eleven Stores <br /> P.O. Box 104 <br /> Pleasanton, ca. 94566-0040 <br /> Re: 7-Eleven store, 9110 Thornton Road, Stockton, California <br /> Dear Dave, <br /> This letter report presents the preliminary results of our <br /> leak investigation at the 7-Eleven Store in Stockton, California. <br /> Groundwater Technology was contracted to evaluate the site after <br /> a review of inventory records indicated a 3,000 to 5,000 gallon <br /> loss of unleaded product and integrity test of the unleaded tank, <br /> product and vapor line system indicated a leak. The purpose of <br /> our investigation was to determine the degree of subsurface <br /> hydrocarbon contamination and if warranted to propose a site <br /> assessment and groundwater clean up program. <br /> On May 5, 1986 the product lines between the pump island and <br /> tank pit were exposed and visual inspection of the lines in this <br /> area did not reveal a point source of leakage although significant <br /> corrosion was noted. An area of contaminated soil was detected <br /> under the cement pad of the pump island suggesting a line leak <br /> had occurred under the pad. <br /> 1 <br /> . sf�4i C1a+tun lia;ld.l'lln.,nd.CA 94521 1-U�1671•''-Ul; lcle%35""16 1 <br /> Robert JoncK1 i <br /> Gn+L>gi�l I <br /> j <br /> GROUNJAVATER TF.CHNOL+OGY <br /> t l slc{a i%of till.HF.Cutl'MY I)til-EMS 1\l' <br />