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I 10 2nd Avenue South,#D7,Pacheco,CA 94553-5560 <br /> McCAMPBELL ANALYTICAL INC Telephone 925-798-1620 Fax 925-798-1622 <br /> hn//www mccampbcll corn E-mail mam@mccampbell com <br /> Advanced GeoEnvironmentaI Client Project ID Flag City Chevron Date Sampled 02/04/02 <br /> 837 Shaw Road Date Received 02/05/02 <br /> Stockton, CA 95215 Client Contact Tam Cuellar Date Extracted 02/06/02 <br /> LChent P O Date Analyzed 02/06/02 <br /> Gasoline Range(C6-C12)Volatile Hydrocarbons as Gasoline*,with Methyl tert-Butyl Ether* &BTEX* <br /> EPA methods 5030,modified 8015,and 8020 or 602,California RWQCB(SF Bay Region)method GCFID(5030) <br /> Lab ID Client ID Matrix TPH(g)} MTBE Benzene Toluene Ethyl Xylenes %Recovery <br /> benzene Surrogate <br /> 89612 Influent W ND 31 ND ND ND ND 105 <br /> 89613 Effluent W ND ND ND ND ND ND 104 <br /> Reporting Limit unless W 50 ug/L 50 05 05 05 05 <br /> otherwise stated,ND <br /> means notli above <br /> the reporting S 1 0 mg/kg 005 0 005 0 005 0 005 0 005 <br /> reporting hinit <br /> *water and vapor samples are reported in ug/L,wipe samples in ug/wipe,soil and sludge samples in mg/kg,and all TCLP and SPLP extracts <br /> in ug/L <br /> "cluttered chromatogram,sample peak coelutes with surrogate peak <br /> 'The following descnptions of the TPH chromatogram are cursory to nature and McCampbell Analytical is not responsible for their <br /> interpretation a) unmodified or weakly modified gasoline is significant, b) heavier gasoline range compounds are significant(aged <br /> gasohne')), c) lighter gasoline range compounds (the most mobile fraction) are significant, d) gasoline range compounds having broad <br /> chromatographic peaks are significant,biologically altered gasoline',e)TPH pattern that does not appear to be derived from gasoline(1),f) <br /> . one to a few isolated peaks present,g)strongly aged gasoline or diesel range compounds dre significant,h)lighter than water immiscible <br /> sheen is present,i)liquid sample that contains greater than—5 vol %sediment,j)no recognizable pattern <br /> DHS Certification No 1644 Edward Hamilton,Lab Director <br />