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` 1 10 2nd Avenue South,#D7,Pacheco,CA 94553-5560 <br /> McCAMPBELL ANALYTICAL INC Telephone 925-798-1620 Fax 925-798-1622 <br /> http//wwwmecampbellco E-mail main@mccampbell com <br /> Advanced GeoEnviromnental Client Project ID Thrifty Oil#772 Date Sampled 04/12/01 <br /> 837 Shaw Road Date Received 04/13/01 <br /> Stockton, CA 95215 Client Contact Bill Little Date Extracted 04/13/01 <br /> Lient <br /> P O Date Analyzed 04/13/01 <br /> Gasoline Range (C&C12)Volatile Hydrocarbons as Gasohne*,with Methyl tert-Butyl Ether* &BTEX* <br /> EPA methods 5030,modified 8015,and 8020 or 602,California RWQCB(5F Bay Region)method GCFID(5030) <br /> Lab ID Client ID Matrix TPH(g)+ MT13E Benzene Toluene Ethyl- Xylenes %Recovery <br /> benzene Surrogate <br /> 65402 Pre Ox Air 9100,a --- 100 220 37 100 --- <br /> 65403 Post Ox Air ND --- ND ND ND 093 101 <br /> s <br /> Reporting Limit unless Air 50 ug/L 50 05 05 0 5 0 5 <br /> otherwise stated,ND <br /> means not detected above <br /> the reporting limit S 10 mg/kg 0 05 0 005 0 005 0 005 0 005 <br /> *water and vapor samples are reported in ug/L,wipe samples in ug/wipe,soil and sludge samples m mg/kg,and all TCLP and SPLP extracts <br /> in ug/L <br /> "cluttered chromatogram,sample peak coelutes with surrogate peak <br /> 'The following descriptions of the TPH chromatogram are cursory in 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 /> gasoline')), c) lighter gasoline range compounds (the most mobile fraction) are significant, d) gasoline range compounds having broad <br /> chromatographic peaks are significant biologically altered gasolme9,e)TPII pattern that does not appear to be derived from gasoline(9),f) <br /> one to a few isolated peaks present, g)strongly aged gasoline or diesel range compounds are 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 />