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l Sequoia 680 Chesapeakc Drive Redwood CIM CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988 9673 <br /> e�ll� Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)911 0100 <br /> Envlros Client Proj ID Shell 6131 Pacific, Stockton Sampled-07/02/97 <br /> EF 270 Perkins Ave Sample Descript SB-2-26 5 Received 07/03/97 L <br /> Sonoma, CA 95476 Matrix SOLID Extracted 07/11/97 <br /> Analysis Method 8015Mod/8020 Analyzed 07/14/97 <br /> Number —9_70—.73...:14uss:_4 _ Reported 07j18j97 <br /> Attention Joe Neely =; <br /> DC Batch Number-GC071197BTEXEXA <br /> Instrument ID GCHP22 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ---- ---mg/Kg- --— -----mg/Kg <br /> TPPH as Gas 1 0 N D <br /> Methyl t-Butyl Ether .... ... .... - 0.425 - - -- - 018 <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 ND ' <br /> Xylenes (Total) 00050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 100 <br /> 4-Bromofluorobenzene 60 140 98 <br /> Analytes reported as N D were not present above the stated limit of detection _ <br /> SEQUOIA ANALYTICAL - ELAP #1210 - <br /> Mike Gregory <br /> Project Manager Page r <br />