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i Sequoia 680 Chesapeake Dnvc Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> Sequoia 404 N W get Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> 4 <br /> 0 Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <br /> EA Engineering Science &Tech Client Prof ID Exxon 7-0137, 51501 37 1300 Sampled 10/10/97 <br /> f <br /> 468 Mt Diablo Blvd Ste 13100 Sample Descript MW2 Received 10/13/97 <br /> afayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 10/20/97 <br /> Attention Chnsta Marting Lab Number 9710816-02 Reported 10f24j97 <br /> C Batch Number GC102097BTEX02A <br /> strument ID GCHP02 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Fnalyte Detection Limit Sample Results <br /> ug/L ug/L <br /> tP H <br /> as Gas 50 N D <br /> ethyl t-Butyl Ether 25 N D <br /> enene 050 N D <br /> Toluene 050 N D <br /> thyl Benzene 050 N D <br /> ylenes (Total) 050 N D <br /> hromatogram Pattern <br /> arrogates Control Limits % % Recove <br /> rifluorotoluene 70 130 93 <br /> 1 <br /> 1 <br /> I <br /> i <br /> nalytes reported as N D were not present above the stated Irmit of detection <br />�QUOIA ANALYTICAL - ELAP #1210 <br /> rId Herling <br /> ct Manager page 2 <br /> 1 <br />