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1 680 Chesapeake Drive Redwood Ory CA 94063 (650) 364 9600 FAX (650)364 9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (5t0) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avcnuc Surtc 8 Sacramento CA 95834 (9t6) 921 9600 FAX (916)921 0100 <br /> i <br /> 1 <br /> EA Engineering Science&Tech Client Proj ID Exxon 7-3942, 51539 42 1300 Sampled 11/11/97 <br /> 3468 Mt Diablo Blvd Ste 6100 Sample Descript Rinse Blank Received 11/12/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 11/22/97 <br /> Attention Christa Marting Lab Number 9711733-05 Reported 12102/97 <br /> C Batch Number GC1022976TEX02A <br /> strument ID GCHP02 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br />'Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> ITPPH as Gas 50 N D <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 0 50 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 /> ISurrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 97 <br /> lie <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> tEQUOIA ANALYTICAL - ELAP #1210 <br /> L l � <br /> d Herling <br /> rct Manager Page 6 <br /> r <br /> 6 <br /> i <br />