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110 2nd Avenue South, #D7,Pacheco, CA 94553 <br /> McCAMPBELL ANALYTICAL INC Tele 510-798-1620 Fax 510-798-1622 <br />' Advanced GeoEnvironmental Client Project ID Stockton Wastewater Date Sampled 05/25/95 <br /> 1803 West March Lane,Ste A Date Received 05/26/95 <br />' Stockton,CA 95207 Client Contact Bob Marty Date Ea1.racted 05127-05128/95 <br /> Client P 0 Date Analyzed 05/27-05128/95 <br />' Gasoline Range(C6-C12)Volatile Hydrocarbons as Gasoline*,with BTEX* <br /> EPA methods 5030 modified 8015 and 8020 or 602 California RVA' CB SF BayRe ion method GCFID 5030 <br /> Lab ID Client 1D Matrix TPH(g) Benzene Toluene Eth}lben- Xylenes % Rec <br />' zene Surrogate <br /> 52873 MWI-5-25-95 W ND ND ND ND ND 103 <br /> 1 <br />' <br /> Reporting Limit unless other- W 50 ug/L 05 05 05 05 NNise stated,ND means not de- <br /> tected above the reporting limit S 10 mg/kg 0 005 0 005 0 005 0 005 <br />' * Hater and vapor samples are reported in ug/L,soil samples in mg/kg,and all TCLP extracts in mg/L <br /> #cluttered chromatogram,sample peak coelutes with surrogate peak <br /> + 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 gasoline is significant,b) heavier gasoline <br /> range compounds are siggnnificant(aged gasoline?),c)It htergasohne range compounds(the most mobile fraction <br /> are si�iificant, d) asorne range compounds ha«ngTroacfchromatogaphic peaks are significant biologically <br /> altered gasoline?,e} TPH pattern thaf does not appear to be derived from gasoline (?),f) one to a�few isolated <br />' peaks present,g)strong] aged gasoline or diesel range compounds are significant,h)lighter than water immiscible <br /> sheen is present,i) ligwd sample that contains greater than— 5 vol % sediment,,]) no recognizable pattern <br />' DHS Certification No 1644 1_74 Edward Hamilton,Lab Director <br /> 1 <br />