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110 Second Avenue South,#D7,Pacheco,CA 94553-5560 <br /> McCAMPBELL ANALYTICAL INC. Telephone:925-798-1620 Fax :925-798-1622 <br /> btW://www.mrQlmpbgllsmE-mail:main@mccampbell.com <br /> Advanced GeoEnvironmental Client Project ID: Strong Properly Date Sampled: 07/15/98 <br /> 4005 North Wilson Way Date Received:07/16/98 <br /> Stockton,CA 95205 Client Contact: Tim Cuellar Date Extracted: 07/17/98 <br />' Client P.O: Date Analyzed: 07/17/98 <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 Ethylben- Xylenes %Recovery <br /> zene Surrogate <br /> 92234 MW-117-15-98 W ND ND ND ND ND ND 100 <br />' 92235 MW-217-15-98 W 2400,b,j ND<25 ND 1.4 1.5 36 83 <br />' 92236 MW-317-15-98 W 150,j ND ND ND ND ND 103 <br /> 92237 MW-4/7-15-98 W ND ND ND ND ND ND 98 <br /> 1 <br /> Reporting g Limit unless W 50 ug/L 5.00.5 0.5 0.5 0.5 <br /> otherwise stated;ND means <br />' not detected above the S 80 0.05 0.005 0.005 0.005 0.005 <br /> reporting limit mg/kg <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/C. <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 />