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110 Second Avenue South,##137,Pacheco,CA 94553-5560 <br /> -� McCAMPBELL ANALYTICAL INC. Telephone:925-798-1620 Fax:925-798-1622 <br /> http://www.mccaml2bell,com E-mail;main@mccampbell.com <br /> i <br /> Advanced GeoEnvironmental Client Project ID: Stockton Plat Date Sampled; 04/22/98 <br /> 4005 North Wilson Way Date Received: 04/24/98 <br /> Stockton,CA 95205 Client Contact:Bill Little Date Extracted: 04/24-04/28/98 <br /> [Client P.O: Date Analyzed: 44/24-04/28/98 <br /> Gasoline Range(C6-C12)Volatile Hydrocarbons as Gasoline*,with Methyl tent-Butyl Ether*&BTEX* <br /> EPA methods 5030,modified 8015,and 8020 or 602;California RWQCB(SF Bay Region)method GCFID(5030) <br /> Ethylben- %Recovery <br /> Lab ID Client ID Matrix TPH(gy MTBE Benzene Toluene Xylenes <br /> zene Surrogate <br /> 88421 ASB4 W ND,i --- ND ND ND ND 98 <br /> 88422 ASB5 W NDJ --- 12 ND 0.86 ND 97 <br /> 88423 ASB7 W NDJ --- ND ND ND 0.64 93 <br /> 88426 ASB6-45 S 100,a --- 0.30 2.0 1.6 5.9 ---" <br /> 88427 ASB6-50 S 4.8,j --- ND 0.015 0.013 0.016 102 <br /> 88428 ASB6-55 S 13,a --- 0.14 0.58 0.24 1.1 ---* <br /> 88429 ASB6-60 S I80,a --- 0.88 5.2 3.0 12 --- <br /> Reporting <br /> —Reporting Limit unless W 50 ug/L 5.0 0.5 0.5 0.5 0.5 <br /> otherwise stated;ND <br /> means not detected above <br /> the reporting limit S 1.0 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 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 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 gasoline?;e)TPH pattern that does not appear to be'derived from gasoline(');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 /> K <br /> 4 <br /> i _ <br />