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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 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 Striker Avenue Suite 8 Sacramento CA 95834 (9t6) 921 9600 FAX(916)921 0100 <br /> " EA Engineering Science&Tech »« Client Prol ID Exxon 7-3942/83739421307 Sampled 05/11/95 „ <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descnpt RW-2 Received 05/12/95 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 05/18/95 <br /> Attention T_Faulkner Lab Number 9505983-19 Reported 05j23195», <br /> ' <br /> QC Batch Number GCO51895BTEX02A <br /> Instrument ID GCHP02 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br />' Analyte Detection Limit Sample Results <br /> ug/L ug/L <br />' TPPH as Gas 1000 12000 <br /> Benzene 10 350 <br /> Toluene - 10 - 670 <br /> Ethyl Benzene 10 560 <br /> Xylenes (Total) - 10 - 1500 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 90 <br /> b <br />' Analytes reported as N D were not present above the stated limit of detection <br /> SEOP91 NALYTICAL - ELAP #1210 <br /> FPr <br /> ggy Penneroject Manager Page 1s <br /> 1 <br />