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McCAMPBELL ANALYTICAL INC. 110 2nd Avenue South,#D7,Pacheco,CA 94553 r _ Tele:510-798-1620 Fax:510-798-b Advanced GeoEnvironmental,Inc. Client Project ID: Arco Mini Mart-4511 Date Sampled:04/09/97 1803 West March Lane Suite A Pacific Date Received`. 04/10/97 Stockton,CA 95207 Client Contact:Bill Little Date Extracted: 04/10/97 Client P.O: Date Analyzed:04/10/97 Diesel Range(CIO-C23)Extractable Hydrocarbons as Diesel EPA methods modified 8015 and 3550 oi 3510;California RX CB SF Bay Region)method GCFID 3550 or GCFID 3510 Lab ID Client ID Matrix TPH(d)+ % Recovery Surrogate 75411 MW4/4-9-97 W 3900,d 103 75412 MW5/4-9-97 W 3900,d 103 75413 MW6/4-9-97 W 12,000,d 102 75414 M W 714-9-97 W 160,d 101 75415 VW1/4-9-97 W 48,000,d,h 115 # 4 Reporting Limit unless other W 50 ug/L wise stated;ND means not de- tected above the reporting limit S 1.0 mg/kg *water samples are reported in ug/L,soil and sludge samples in mg/kg,and all TCLP and STLC extracts in mg/L # cluttered chromatogram resulting in coeluted surrogate and sample peaks, or; surrogate peak is on elevated baseline,or;surrogate has been diminished bydilution of original extract. } The following descriptions of the TPH chromatogram are cursory in nature and McCampbell Analytical is not { responsible for their interpretation: a) unmodified or weakly modified diesel is significant; b) diesel range compounds are significant;no recognizableppattern;c) aged diesel?is significant);d)gasoline range compounds are significant; e) medium boiling point ppattern that does not match diesel (?)- 0 one to a few isolated peaks present;g)oil range compounds are significant;h)lighter than water immiscible sheen is present;i)liquid sample that contains greater than--- 5 vol.% sediment. DHS Certification No. 1644 �� Edward Hamilton,Lab Director FFA' -. {