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' Sequoia 680 Chesapeake Dnve Redwood Cosy CA 94063 (4t5) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> EA Engineering Science &Tech w Cient Proj 15 Exxon 7-3942/83739421307 Sampled 05/19/95 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript MW-9 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 9505983.1_6_ _ _ Reported 05123195 <br /> QC Batch Number GC051995BTEXiOA µ <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 2000 8300 <br /> Benzene 20 2500 <br /> Toluene 20 fib <br /> Ethyl Benzene - 20 .. 110 <br /> Xylenes (Total) 20 490 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 84 <br /> b <br /> Analytes reported as N D were not present agave the stated limit of detection <br /> SEQ ALYTICAL - ELAP #1210 <br /> ggy Penner <br /> Project Manager Page 3s <br /> i <br />