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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> Z 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX 1510)988 9673 <br /> Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)92t 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 RW-3 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 -9505983-18 _ _ _ _ Reported 05123195 <br />' QC Batch Number GC051d95BTEX2IA <br /> Instrument ID GCHP21 <br /> Total Purgeabie Petroleum Hydrocarbons (TPPH) with BTEX <br />' Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 20000 90000 <br /> Benzene 200 7600 <br /> Toluene - - - - 200 - 10000 <br /> Ethyl Benzene - •- 200 2700 <br /> 12000 <br /> Xylenes (Total) - 200 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 89 <br /> b <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQU NALYTICAL - ELAP #1210 <br /> e y Penner <br /> Protect Manager Page 18 <br />