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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 /> httn./Iwww.mccamnhell.com E-mall main@mccampbell com <br /> I� <br /> Date Sampled 06/15/98 <br /> Advanced GeoEnvironmental Client Project ID #0128,Arco <br /> 4005 North Wilson Way Date Received 06/17/98 <br /> IStockton,CA 95205 Client Contact Bill Little Date Extracted 06117-06119198 <br /> Client P O Date Analyzed 06/17-06/19/98 <br /> Gasoline Range(C6-C12)Volatile Hydrocarbons as Gasoline*,with Methyl tert-Butyl Ether* &BTEX* <br /> L EPA methods 5030,modified 8015,and 8020 or 602,Cahfomia RWQCB(SF Bay Region)method GCF1D(5030) <br /> Recovery <br /> Lab ID Client ID <br /> Matrix TPH(g)+ MTBE Benzene Toluene Etzeneen Xylenes Surrogate <br /> 90585 MWI/8-15- W ND NTD ND ND ND ND 102 <br /> 90586 MWg8-15- W 1800,a 120 52 31 87 160 102 <br /> 90587 MW3/6-15- W 62,1 25 ND ND ND 093 106 <br /> 98 <br /> 90588 MW98-15 W ND ND ND ND ND 085 107 <br /> 90589 <br /> MWS/6-15- W 3900,a 870 140 7 8 120 92 103 <br /> 90590 MW6/6-15- W 29,000,b,c 640 870 140 1900 6600 103 <br /> 98 <br /> 90591 MW7/6-15- W 110,c 72 060 ND ND ND 106 <br /> 98 <br /> 90592 VWl/6-15- W 37,000,a 410 270 1900 1600 7500 101 <br /> 98 <br /> Reporting Limit unless W 50 ug/L so 05 05 05 05 <br /> otherwise stated,ND <br /> means not detected above S 1 0 mg/kg 005 1 0 005 0 005 0 005 0 005 <br /> the reporting httut <br /> end vnrw%r samnlen are renorted in us.IL. wipe samples in ug/wipe,sod 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 /> i <br /> *The following descriptions of the TPH chromatogram are cursory in nature and McCampbcll Analytical is not responsible for their <br /> interpretation a) unmodified or weakly modified gasoline is significant, b) heavier gasoline range compounds are signiftcant(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("i),1) <br /> one to a few isolated peaks present,g)strongly aged gasoline or diesel range compounds are significant,h)lighter than water imin scibie <br /> sheen is present,i)liquid sample that contains greater than—5 vol %sediment,S)no reeognizab1cpattern <br /> DHS Certification No 1644 -Edward Hamilton,Lab Director <br />