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LI, <br />Ci <br />C <br />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, Cc <br />Grayland Environmental <br />.5597 <br />QS <br />Jeffrey A. Clayton, R.G., REA <br />Principal Geologist <br />O' C ®� <br />JAC.jbc <br />attachment: Appendix A - Laboratory Report (KtffAnal tical Report Numbers: 34919 and 34954 <br />) <br />cc: Mr. Steven Shih, E.H. S. (SJCEHD, 304 E. Weber Ave., Third Floor, Stockton, CA 95202-2708) <br />GIM nAIM ENVIRONMENTAL <br />Grayland 022-370.fdr 6 <br />