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Sequoia 680 Chesapeake Dnve Redwood City,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 /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> 12 Envlros _Client«Prol ID Shell 6131 Pacific, Stockton Sampled 07/02/97 <br /> L El 270 Perkins Ave Sample Descript SB-2-16 5 Received 07/03/97 <br /> i» Sonoma, CA 95476 Matrix SOLID Extracted 07/11/97 <br /> Ei <br /> Analysis Method 8015Mod/8020 Analyzed 07/12/97 <br /> Attention Joe Neem _ _ �— »_»»—Lab Number 9707310-03 _ _ Reported_a7j18j97 <br /> (jC Batch Number»GC071197BTEXEXA <br /> Instrument ID GCHP18 <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 .. ........ .. 10 .................. . 4.1 <br /> Methyl t-Butyl Ether .. ... .. 0 025 . ............... . 3.2 <br /> Benzene .. ..... .. 00050 .. ............... . 0 015 <br /> Toluene .. .--- •-- 00050 .................. . 0.011 <br /> Ethyl Benzene .. ... .. 00060 . . ............. . 0 067 <br /> Xylenes (Total) .. ...... . 00050 ................. . 026 <br /> Chromatogram Pattern .. ... .. .... .......... . C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 83 <br /> 4-Bromofluorobenzene 60 140 111 <br /> a <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> �y <br /> &Gregory <br /> ect Manager Page 3 <br />