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/ - \ Sequoia 680 Chesapeake Dnvc Redwood CLty 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 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> - EA Engineering Science &Tech Client-Pro) ID - _Exxon 7-0137, 5150137 1300-- _ Sampled 07/21-/97 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descrlpt MW7 Received 07/23/97 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 07/29/97 <br /> Attention Chnsta_Martmg Lab Number 9707B97-06 Reported O8jn4j97 <br /> 1[C Batch Number ~GC072997BTEX02A <br /> strurnent ID GCHP02 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L. ug/L <br />' TPPH as Gas 50 67 <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 /> Discrete Peaks C6-C7 <br /> Surrogates Control Limits % % Recove <br /> Trifluorotoluene 70 130 112 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> fj,enFollett <br /> _t Manager Pae fi <br /> 9 <br />