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Mr.Michael Walton October 16,2003 <br /> Walton Engineering,Inc. <br /> metals were detected in the soil sample collected from beneath the former underground storage tank, <br /> while only slightly elevated concentrations of the fuel oxygenates MtBE and tBA were detected at <br /> one location beneath the former product line trench at the site. According to these data, soil beneath <br /> the former fuel dispensers and underground product lines had not been impacted with gasoline-range <br /> fuel hydrocarbons or any of the volatile organic BTEX compounds. <br /> Because the soil contamination detected at the site appeared to be minor, it was our contention that <br /> the site required no further action regarding this underground storage tank and fuel dispenser removal <br /> work. If further action concerning this minor soil contamination is required by SJCEHD, then <br /> Grayland recommends that the spatial extent of subsurface soil contamination at the site be <br /> investigated and that groundwater beneath the site be evaluated for potential fuel hydrocarbon <br /> contamination by installing one or more soil borings/monitor wells and collecting subsurface soil and <br /> groundwater samples for chemical analysis. Grayland further recommends that any field procedures <br /> required to comply with regulatory directives be presented to SJCEHD in a Site Contamination Work <br /> Plan, prior to initiating the subsurface environmental investigation at the site. <br /> If you have any questions regarding the material presented in this Underground Storage Tank and <br /> Fuel Dispenser Removal Report, please do not hesitate to contact our office. Thank you for the <br /> opportunity to provide our environmental consulting services to Walton Engineering. <br /> Sincerely, ,��Et� CC p <br /> Grayland Environmental � V Clgy 2NO.5597 <br /> - <br /> Exp-8l31/05' <br /> Jeffrey A. Clayton, R.G., REA * <br /> Principal Geologist %3q�OF'CA1>F��� <br /> JAC-jbc <br /> attachment: Appendix A-Laboratory Report(KiffAnalytical Report Numbers: 34919 and 34954) <br /> cc:Mr. Steven Shih,E.H.S.(SJCEHD,304 E.Weber Ave.,Third Floor, Stockton,CA 95202-2708) <br /> GRAYLAND ENVIRONMENTAL <br /> Grayland 022-370.fdr 6 <br />