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110 Second A\enue South,##D7,Pacheco,CA 94553 <br /> McCAMPBELL ANALYTICAL INC Telephone 510-798-1620 Fax 510-798-1622 <br /> htt //wxvw mccam bell corn E-mail main@mccampbell corn <br /> Advanced GeoEnvironmental Client Project 1D Cherokee Truck Stop Date Sampled 09/17/97 <br /> 1803 West March Lane, Ste A Date Received 09/18/97 <br /> Stockton, CA 95207 Client Contact Kevin McKibben Date Extracted 09/18/97 <br /> LChentPO Date Analyzed 09/18/97 <br /> Gasoline Range(C6-Cl2)Volatile Hydrocarbons as Gasoline*, iNith Methyl tert-Butyl Ether* &BTEX* <br /> EPA methods 5030,modified$0i 5,and 8020 or 602,California RWQC(SF Bav Region)method GCFiD(5030) <br /> Lab ID Client ID Matrix TPH(g)+ MTBE Benzene Toluene Ethylben- 1 Xylenes %Recovery <br /> zene Surrogate <br /> 80888 UST-219-17-97 W ND ND ND ND ND ND 95 <br /> 80889 UST-39/9-17-97 W ND ND ND ND ND ND 105 <br /> 80890 UST-419-17-97 W ND ND ND ND ND ND 105 <br /> 80891 UST-519-17-97 W 370,c 1]& 5 7 ND ND ND 109# <br /> AIL <br /> & This MTBE value did not confiim by EPA 8260 <br /> Reporting Limit unless <br /> W 50 ug/L 50 OS OS 05 OS <br /> othentiise stated,ND means <br /> not detected abo%a the S 0 0 05 0 005 0 005 0 005 0 005 <br /> reporting linvt mg/kg <br /> *«ater and vapor samples are reported in ug/L,Wipe samples in ughN ipc,soil and sludge samples in m=/kg and all TCLP and SPLP exit acts <br /> in ug/L <br /> #cluttered chromatogram,sample peak coelutes with surrogate peak <br /> *The following descriptions of the TPH chromatogram are cursory in n.ituie and McCampbell Analytical is not responsible for their <br /> interpretation a) unmodified or weakly modified gasoline is significant b) hL3Nlel edsoline iange compounds are significant(aged <br /> gasoline"), c) lighter gasoline range compounds (the most mobile Iracrron) -ie signrficant d) gasoline iange compounds having broad <br /> Chromatographic peaks are significant,biologically altered gasoline' e) TPH patio n that docs not appear to be derived from gasoline(7) #) <br /> one to a few isolated peaks present,g)strongly aged gasoline or diesel range compounds .ire significant h) lighter than water tmmiscible <br /> sheen is present,i)liquid sample that contains greater than v5 sol % sediment j)no recognizable pattern <br /> DHS Certification No 1644 ///—Edward Hamilton, Lab Director <br />