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Sequoia 680 Chesapeake Dave Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> y 404 N WiSet Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 989 9673 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> EA EngineeringScience&Tech Client Prot ID Exxon 7-3942/83739421307 Sampled 05/11/95 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW-13 Received 05/12/95 _ <br /> Lafayette, CA 94549 Matrix LIQUID _ <br /> Analysis Method 8015Mod/8020 Analyzed 05/18/95 - <br /> s Attention T Faulkner_- __ _ _____Lab Number 9505983-14 _ _ _ _ _ _ Reported 05/23195_ <br /> QC Batch Number GCO51895BTEX03A <br /> Instrument ID GCHP03 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L. <br /> rTPPH as Gas 50 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 95 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQU NALYTICAL - ELAP #1210 <br /> 77 <br /> gy Penner <br /> ro�ect Manager Page 14 <br /> 1 <br />