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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 /> /www E-mail main@mccampbell com <br /> Advanced GeoEnvironmental Client Project ID Chapin Date Sampled 07/22/98 <br /> 4005 North Wilson Way Date Received 07/22/98 <br /> Stockton,CA 95205 Client Contact Bill Little Date Extracted 07/22-07/23/98 <br /> Client P O Date Analyzed 07/22-07/23/98 <br />' Gasoline Range(C&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 /> + Ethylben- %Recovery <br /> Lab 1D Client ID Matrix TPH(g) MTBE Benzene Toluene zene Xylenes Surrogate <br /> 92520 Pre Pump Air 180,1 --- ND ND ND 2 7 101 <br /> ' 92521 Post Pump Air 56,1 ND ND ND 0 79 98 <br /> t <br /> 1 <br /> 1 <br /> 1 <br /> I <br /> 1 <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 005 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 peals coelutes with surrogate peak <br /> 'Tlie 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 /> gasohne9), c) lighter gasoline range compounds (the most mobile fraction) are significant, d) gasoline range compounds having broad <br /> chromatographic peaks are significant,biologically altered gasolmel,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,})no recognizable pattern <br /> DHS Certification No 1644 Edward Hamilton,Lab Director <br /> 1 <br />