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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9133 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (590) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services Client Proj ID Shell Stockton/971202-Li Sampled 12/02/97 <br /> 1680 Rogers Avenue Sample Descript MW-5 Received 12/03/97 <br /> San Jose, CA 95112 Matrix LIQUID <br />—3 Analysis Method =8015Mod/8020 Analyzed 12/_16/97 <br /> Attention Fran Thie _ Lab Number 9712358-07 Reported 12119797 <br /> QC Batch Number GC121697BTEX21A <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 250000 N D <br /> Methyl t-Butyl Ether 12500 .. 710000 <br /> Benzene .... 2500 . 14000 <br /> Toluene - - - - 2500 - - -- 13008 <br /> Ethyl Benzene 2500 N D <br /> Xylenes (Total) 2500 9700 <br /> Chromatogram Pattern C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 109 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOltAYTICAIL - ELAP #1210 <br /> • <br /> Peggy P er <br /> Project Manager Page 21 <br />