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110 Second Avenue South,#D7,Pacheco,CA 94553 <br /> McCAMPBELL ANALYTICAL INC Telephone 510-798-1620 Fax 510-798-1622 <br /> http llw'kv%v mccampbell com E-mail main@mccampbell com <br />' <br /> Advanced GeoEnvironmental Client Project ID West Clay Property Date Sampled 05123 &27197 <br />' 1803 West March Lane, Ste A Date Received 05/28/97 <br /> Stockton, CA 95207 Client Contact Kevin McKibben Date Extracted 05128-06/02/97 <br />' Client P O Date Analyzed 05128-06102197 <br /> Gasoline Range(C6-C12) Volatile Hydrocarbons as Gasoline*,v ith Methyl tert-Butyl Ether* &BTEX* <br />' EPA methods 5030,modified 8015,and 8020 or 602,California RWQCB(SF Bay Region)method GCFID(5030) <br /> Lab ID Client ID Matrix TPH(g)' MTBE Benzene Toluene Ethylben- Xylenes %Recovery <br /> zene Surrogate <br />' 76953 MW-4-25 S ND ND ND ND ND ND 105 <br /> 76954 MW-5-25 S ND ND ND ND ND ND 102 <br />' 76955 MW-1/5-27-97 W 500,a 80 51 19 44 103 <br /> 76956 MW-215-27-97 W 17,000,a 58 1100 1500 230 2200 102 <br />' 76957 MW-315-27-97 W 270,a \D 28 0 71 14 15 102 <br /> 76958 MW-415-27-97 W ND N ID ND ND ND ND 102 <br /> 76959 MW-5/5-27-97 W 52,a NID 2 4 6 3 1 7 56 102 <br /> Reporting Limit unless W 50 ug/L 5 0 05 0 5 0 5 0 5 <br />' otherwise stated.ND means <br /> — --T— <br /> not detected above the S 1 0 mg/kg 005 0 005 0 005 0 005 0 005 <br /> reporting limit <br /> -- <br /> *water and vapor samples are reported in ug/L.,wipe samples in ug/,Alpe soil and sludge samples in mg/kg,and alk TCLP and SPLP extracts <br />' in ug/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 <br /> interpretation a) unmodified or weakly modified gasoline is significant b) heavier gasoline range compounds are signifcant(aged <br /> gasoline), c) lighter gasoline range compounds (the most mobile fraction) are significant, d) gasoline range compounds having broad <br /> r chromatographic peaks are significant,biologically altered gasoline9 e)TPH pattern that does not appear to be derived from gasoline(9),f) <br /> one to a few isolated peaks present,g)strongly aged gasoline or diesel range compounds are significant,h)lighter than water immiscible <br /> sheen is present,i)liquid sample that contains greater than–5 vol %sediment j)no recognizable pattern <br /> DHS Certification No 1644 l/ Edward Hamilton, Lab Director <br />