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Eli <br /> Poo <br /> Qd�PONT <br /> Du PONT ENVIRONMENTAL REMEDIATION SERVICES <br /> ' 7068 Koll Center Parkway,Suite 401 <br /> Pleasanton,CA 94566 <br /> j' (415)462-7772 <br /> t Fax:(415)462-7944 July 25, 1990Job No. 1088-Q12-5 <br /> ti I I Mr.Gregory P.Fletcher <br /> Conoco Inc. <br /> 600 North Dairy Ashford <br /> TR 3056 <br /> t Houston,Texas 77079 <br /> SUBJECT. Quarterly Ground-Water Sampling Repoli <br /> June 1990 <br /> Fast Gas Station <br /> �. 800 East Highway 12 <br /> Lodi,California <br /> Dear Mr..Fletcher: <br /> r INTRODUCTION <br /> x <br /> This report presents the results of the quarterly ground-water sampling which was conducted at the Fast <br /> Gas Station,800 East Highway 12,Lodi,California(see the Location Map,Figure 1),on dune 8, 1990. 1 <br /> The purpose of this sampling program is to monitor and evaluate the extent of hydrocarbon <br /> contamination in the ground water at the subject property. <br /> a SUMMARY t <br /> s <br /> A summary of data regarding ground-water levels for the June 1990 quarter is presented in Table A- <br /> ........... <br /> . i <br /> xj In general,ground-water Ievels have dropped approximately 1.9 feet since the last quarterly sampling, I <br /> Lam'. <br /> ��¢ The ground-water gradient for this quarter is unable to be determined since all but wells MW 20 and <br /> MW- <br /> 18R were dry (see the Ground-Water Elevation Map, Figure 2). Chemical analytical results <br /> i indicate a slight increase in concentrations of petroleum hydrocarbons in MW-20 since the last quarter , <br /> (see Table B and Appendix B). Figure 3 presents the benzene concentration of MVW-20 within the <br /> {,E ground water for the site. This site is scheduled to be resampled during September 1990. <br /> WA <br /> Respectfully submitted, <br /> DU PONT ENVIRONMENTAL.REMEDIATION SERVICES <br /> Q�.cd.. <br />­Wr' �� - Staff Geologist Registered Geologist, RG 4516 — - `- <br /> c, <br /> t <br /> Better Things For Better Living <br /> Z- <br />