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110 2nd Avenue South #D7 Pacheco CA 94553-5560 <br /> McCAMPBELL ANALYTICAL INC Telephone 925-798-1620 Fax 925-798-1622 <br /> hqR//www mccampbell com E-mail main@mccampbell com <br />' Advanced GeoEnvironmental Client Protect ID Arco Mini Mart Date Sampled 07/08/99 <br /> 4005 North Wilson Way Date Received 07/13/99 <br />' Stockton, CA 95205 Client Contact Bill Little Date Extracted 07/13-07/14/99 <br /> Client P O Date Analyzed 07/13-07114199 <br /> Gasoline Range(C6-C12)Volatile Hydrocarbons as Gasohne*,with Methyl tent-Butyl Ether* & BTEX* <br /> EPA methods 5030,modified 8015 and 8020 or 602 California RW B SF Bav Region)method GCFID 5030 <br />' Lab ID Client ID Matrix TPH(gr MTBE Benzene Toluene Ethzen en- Xylenes */Buecovery rro ate <br /> 15251 MW-1 W ND 52 ND ND ND ND 107 <br />' 15252 MW-2 W ND 19 ND ND ND ND 109 <br /> 15253 MW-3 W ND 13 ND ND ND ND 109 <br /> 15254 MW-4 W 9200,a ND<100 16 66 540 I900 98 <br />' 15255 MW-5 W 80,000,a ND<400 580 9400 4100 20,000 99 <br /> 15256 MW-6 W 410,a ND<160 41 097 53 13 ]O] <br /> 15257 MW-7 W ND 44 ND ND ND ND 107 <br /> 15258 VW-1 W 5000,a ND<400 120 260 160 420 105 <br /> I <br /> Reporting Limit unless <br /> otherwise stated,ND W 50 u 50 05 05 05 05 <br /> means not detected <br /> above the reporting S 1 0 mg/kg 005 0 005 0 005 0 005 0 005 <br /> 'water and vapor samples are reported to ug/L,a ipe samples to ug/wipe,sod and sludge samples to mgfkg,and all TCLP and SPLP extracts <br /> I in ug/L <br /> "cluttered chromatogram,sample peak coclutes with surrogate peak <br /> `The following descnpttons of the TPH chromatogram are cursory in nature and lvlcCampbell Analytical is not responsible for their <br /> intefpretation 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 gasoltne9 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,t liquid sample that contains greater than—5 vol %sediment no recognizable panem <br /> DHS Certification No 1644 i Edward Hamilton, Lab Director <br /> I <br />