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ME Raw <br /> --"—' GROUNDWATER MAY 19 1906 <br /> TECHNOLOGYF1 ENVIROWNTAL HFALTH <br /> Cansulnng(3rorrndwgrnr Qooragisls <br /> A Division of Oil kecnvery Syslrnts,1110. FERw/sMlCE <br /> 5047 CLAYTON ROAD•CONCOnD.CA 94521•(415)671.2387 <br /> May 15, 1986 <br /> Dave Lewis <br /> 7-Eleven stores <br /> P.O. Box 104 <br /> Pleasanton, Ca. 94566-0040 <br /> Res 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 i <br /> under the cement pad of the pump island suggesting a line leak 1 ' <br /> had occurred under the pad, <br /> :xl4 t Clayton R\td,C-11cord.CA u.1 'E 131.1 of F- :1ti7.!clet 3 tyri7 <br /> a>j <br /> Robed Juncal <br /> - T GnduYist <br /> GROUTER TECHNOWCY <br /> AUE47�In,\1YFrHI.RF,C'61111'-IN IT 1:11,,INi- <br /> . , lnn`�,r7iny[:n,uaJu ur:r l:rJa•,t <br />