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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 /> hip//www—mcc=p ell coin E-mail main@mccampbell corn <br /> Date Sampled 07/06/98 <br /> Advanced GeoEnvironn Intal Client Project ID Flag City Chevron <br /> 4005 North Wilson Way Date Received 07/08/98 <br /> Stockton,CA 95205 Client Contact Tim Cuellar Date Extracted 07/08-07/15/98 <br /> Client P O Date Analyzed 07/08-07/15/98 <br /> Oxygenated Volatile Organics By GC/MS <br /> EPA method 8260 modified <br /> E Lab ID 91828 91829 91830 <br /> Reporting Limit <br /> Client ID MW-6A MW-6B MW-7 <br /> Matrix W W W S W <br /> Compound Concentration* ug/kg ug/L <br /> Di-isopropyl Ether(D1PE) ND ND ND 50 10 <br /> Ethyl tert-Butyl Ether(ETRE) ND ND ND 50 10 <br /> Mcthyl-tort Butyl Ether(MTBE) 68 13 8 1 so 10 <br /> tert-Amyl Methyl Ether(TAME) ND ND ND so 10 <br /> I <br /> tert-Butanol ND ND ND 25 so <br /> Surrogate Recoveries(%) <br /> Dibromo0uoromethane 109 109 109 <br /> Comments <br /> •water samples are reported in ug/L,soil and sludge samples in ug/kg,wipes in ug/wipe and all TCLP/STLC!SPLP extracts in ug/L <br /> ND means not detected above the reporting lirrat,NIA means surrogate not applicable to this analysis <br /> (h)lighter than water immiscible sheen is present,(i)liquid sample that contains greater than—5 vol %sediment,0)sample diluted due to <br /> high organic content <br /> DHS Certification No 1644 Edward Hamilton,Lab Director <br />