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110 2nd Avenue South, #137, Pacheco, CA S <br />■ McCAMPBELL ANALYTICAL INC Tele. 510-798-1620 Fauc 510-798-1622 <br />Geological Audit Services <br />Chent Project ID Mid Cal Leasing II <br />Date Sampled 04/15/94 <br />1803 West March Lane, Ste A <br />Date Received 04/15/94 <br />Client Contact Bob Marty <br />Date Extracted 04/17/94 <br />Stockton, CA 95207 <br />Client P O <br />Date Analyzed 04/17/94 <br />Gasoline Range <br />(C6 -C12) Volatile Hydrocarbons as Gasoline', <br />with BTEX• - <br />EPA methods 5030 modified 8015 and <br />8020 or 502 Cahfornla RW CB SF Ba Re on method <br />GCFID 5030 <br />Lab ID Chent ID <br />Matrix TPH(g)+ Benzene Toluene <br />E hyl e n Xylenes Surrogate <br />35161 MW -1/4-15-94 <br />W ND ND ND <br />ND ND 97 <br />35162 <br />MW -2/4-15-94 <br />W <br />ND <br />ND <br />ND <br />ND <br />ND <br />97 <br />35163 <br />MW -3/4-15-94 <br />W <br />ND <br />ND <br />ND <br />ND <br />ND <br />97 <br />Detection Limit unless other- W 50 ug/L 05 05 05 05 <br />wise stated, ND means Not <br />Detected S 10 mg/kg 0 005 0 005 0 005 0 005 <br />*water samples are reported in ug/L, soil samples in mg/kg, and all TCLP extracts in mg/L <br /># cluttered chromatogram, sample peak co -elutes with surrogate peak <br />+ The following descriptions of the TPH chromatogram, are cursory in nature and McCampbell Analytical is not <br />responsible for their interpretation a)) unmodified or weakly modified gasoline is si cant b) heavier gasoline <br />range compounds are sigmficant(aged gasoline?), c) lighter gasoline range compounds (the most mobile fraction) <br />are significant d) gasoline range compounds are sicant, no recognizable pattern e) TPH pattern that does <br />not appear to �e derived from gasoline {{7) one o a few isolated peaks present, 0 strongly aged gasoline or <br />diesel range compounds are significant, h) lighter than water immiscible phase is present <br />DH S Certification No 1644 Edward Hamilton, Lab Director <br />