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110 Second Avenue South,#D7,Pacheco,CA 94553 <br /> 4 MCCAWBELL ANALYTICAL INC Telephone 510-798-1620 Fax 510-798-1622 <br /> hnp I/www mccampbell tom E-mail main@mccampbell com <br /> Advanced GeoEnvironmental Client Project ID Den's Auto Date Sampled 09/24/97 <br /> 1803 West March Lane, Ste A Date Received 09/25/97 <br /> Stockton, CA 95207 Client Contact Bill Little Date Extracted 09127-09129197 <br /> Client P O Date Analyzed 09127-09129197 <br /> Gasoline Range(C6-C12)Volatile Hydrocarbons as Gasoline*,v►rth Methyl tert-Butyl Ether* &BTEX* <br /> EPA methods 5030,modified 8015,and 8020 or 602 California RWQCB(SF Bay Region)method GCF1D(5030) <br /> Lab Client ID Matrix TPH(g){ MTBE Benzene Toluene Ethylben Xylenes %Rec <br /> ID -zene Surrogate <br /> 81173 MW1-A/9-24-97 W 13,000,a --- 33008- 200 700 380 107 <br /> 81174 MW1-B/9.24-97 W 7000,a --- 320 41& 250 170 105 <br />' 81175 MW2-A/9-24/97 W I1,000,a --- 1900 55 260 990 106 <br /> 81176 MW2-B/9-24-97 W I1,000'a 120 20 190 1500 102 <br /> 81177 MW3-A/9-24-97 W 1100,1 --- 099 3 98' 2 4& 7 1" 101 <br /> 81178 MW3-B/9-24-97 W 1600,) --- ND 2 16` 214 6 0& 102 <br /> Result not in substantial agreement with EPA 8260 result,presumably due to the less certain compound identification/ <br /> resolution inherent in EPA method 8020 <br /> Reporting Limit unless W 50 u /L 5 0 05 05 05 05 <br /> otherwise stated,ND means g <br />' not detected above the S 005 0 005 0 005 0 005 0 005 <br /> reporting limit mg/kg <br /> water and vapor samples are reported in ug/L,wipe samples in ug/wipe soil and sludge samples in mg/kg,and all TCLP and SDLP extracts <br />' <br /> in uglL <br /> "cluttered chromatogram,sample peak coelutes with surrogate peak <br /> 'The following descriptions of the TPH chromatogram are cursory in nature and McCampbe€l Analytical is not responsible for their <br />' interpretation a) unmodified or weakly modified gasoline is significant, b) header gasoline range compounds are significant(aged <br /> gasoline')), c) lighter gasoline range compounds (the most mobile fraction) aic significant d) gasoline range compounds having broad <br /> chromatographic peaks are significant,biologically altered gasoline'),e)TPH patteni that does not appear io be derived from gasoline(°),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 //-/-Edward Hamilton,Lab Director <br />