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1 Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAK(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 F-kX(510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EA Engineering Science&Tech Client Pro) ID Exxon 7-3942/83739421307 Sampled 05/11/95 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW-5 Received 05/12/95 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 05/19/95 - <br /> - Attention T Faulkner Lab Number 9505983-02 Reported 05f23195 <br /> QC Batch Number GC051995BTEX21 A- <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> 1 Analyte Detection Limit Sample Results <br /> ug/L ug/L. <br /> 1 TPPH as Gas 50 350 <br /> Benzene 050 t 4 <br /> Toluene - - 050 t 2 <br /> Ethyl Benzene 050 7 5 <br /> 1 Xylenes (Total) 0 50 4 8 <br /> Chromatogram Pattern Gas <br /> 1 Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 92 <br /> b <br /> 1 <br /> i <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEa NALYTICAL - ELA>a #1210 <br /> eggy Penner <br /> Project Manager Page 2 <br />