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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415} 364 9600 FaX(415) 364 9233 <br /> 404 N Wiget Lane Wainut Creak CA 94598 (510) 988 9600 FkX(310) 988 9573 <br /> Analytical 819 Smker Avenue Suite 3 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942/8373942M1307 Sampled 10/19/95-- <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript 3942 MW13NP Received 10/20/95 <br /> Lafayette, CA 94549 Matrix LIQUID _ <br /> Analysis Method 8015Mod/8020 Analyzed 10/24/95 <br /> Attention Tracy Faulkner _ Lab Number 9510F27-02 _ Reported 10J27195 <br /> OC Batch Number GC1024958TEX20A - - - -- -- _- <br /> Instrument ID GCHP20 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br /> Benzene 050 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 90 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SE U1 A L CAL - ELAP #1210 <br /> ggy Penner <br /> Project Manager Page 2 <br />