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' - \ Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 96W FAX(650) 364 9233 <br /> 404 N Wq et Lane Walnut Creek CA 94598 (510) 988 9600 FAX (5t0) 988 9673 <br /> �Illll� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(9 t6) 921 0100 <br /> EA Engineering Science &Tech Client�Prol 1D Exxon 7-3942, 51539 42 1300 Sampled 08/26/97 <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descript RW1 Received 08/27/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 09/02/97 <br /> Attention Christa_Marting Lab Number 9708E45-12 _ Reported 09f04/97 <br /> fnC Batch Number GC090297BTEX18A <br /> strumentlD GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> tAnalyte Detection Limit Sample Results <br /> ug/L ug/L. <br />' TPPH as Gas 5000 21000 <br /> Methyl t-Butyl Ether 50 380 <br /> Benzene 50 <br /> 600 <br /> Toluene 50 2600 <br /> Ethyl Benzene 50 1200 <br /> Xylenes (Total) 50 3400 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 83 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> FEQUOIAANAL"CAL - ELAP 41210 <br /> iF �ip_- - - - -- <br /> R1 Herlmg <br />�r Manager <br /> Page 10 <br />