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641110 Second Avenue South,#D7,Pacheco,CA 94553-5560 <br /> McCAWBELL ANALYTICAL INC Telephone 925-798-I620 Fax 925-798-1622 <br /> b=.1h E-mail matn@mccampbell coin <br /> Advanced GeoEnvironmental Client Project ID #0128,Arco Date Sampled 06/15/98 <br /> 4005 North Wilson Way Date Received 06/17/98 <br /> Stockton,CA 95205 Client Contact Bill Little Date Extracted 06/19/98 <br /> Client P O Date Analyzed 06/19/98 <br /> Diesel Range(CIO-C23)Extractable Hydrocarbons as Diesel <br /> EPA methods modified 8015,and 3550 or 3510,California RWQCB(SF Bay Region)method GCFID(3550)or GCF1D(3510) <br /> Lab 1D Client 1D Matnx TPH(d)* %Recovery <br /> Surrogate <br /> 90585 MW1/6-15-98 W 66,g 105 <br /> 90586 MW4/6-15-98 W 830,d,g 100 <br /> 90587 MW3/6-15-98 W 150,g,d 99 <br /> 90588 MW2/6-15-98 W 150,g 99 <br /> 90589 MW5/6-15-98 W 2800,d 98 <br /> 90590 MW6/6-15-98 W 7100,d 98 <br /> 90591 MW7/6-15-98 W 93,b 100 <br /> 90592 VW1/6-15-98 W 9200,d 98 <br /> Reporting Limit unless otherwise W 50 ug/L <br /> stated,ND means not detected above <br /> the reporting limit S 10 mg/kg <br /> •uater and vapor samples are reported in ug/L,wipe samples in ug/wipe,soil and sludge samples in mg/kg,and all TCLP/STLC/SPLP <br /> extracts in ug/L <br /> IF cluttered chromatogram resulting in coeluted surrogate and sample peaks,or,surrogate peak is on elevated baseline,or,surrogate has been <br /> diminished by dilution of original extract <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 diesel is significant,b)diesel range compounds are significant,no recognisable pattern,c) <br /> aged diesel?is significant),d)gasoline range compounds are significant,e)medium boiling point pattern that does not match diesel(?),f) <br /> one to a few isolated peaks present, g)oil range compounds are significant.h)Tighter than water imrmscble sheen is present, i) liquid <br /> sample that contains greater than—5 vol %sediment. <br /> DHS Certification No 1644 / r Edward Hamilton,Lab Director <br />