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! Sequoia 680 Chesapeake Drive Redwood Ciry CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N W get Lane Walnut Creek CA 94598 (S 10)988 9600 FAX(510)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921 0100 <br /> frlll>� Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792 1865 FAX(707)79Z-0342 <br /> 6 <br /> EA Engineering Science &Tech Client Prod ID Exxon 7-3942, 5153942 1300 _- Sampled 05/20/98 <br /> 3468 Mt Diablo Blvd Ste 13100 Sample Descript MW13 Received 05/21/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 06/03/98 <br /> Attention Christa Marting Lab Number 9805E41-12 Reported 06j10198 <br /> U <br /> C Batch Number GC0603986TEX21 A <br /> strument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Llmlt Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 82 <br /> r <br /> Analytes reported as N D were not present above the stated limit of detection <br /> 1EQUOIA ANALYTICAL - ELAP #1210 <br /> --1Z �U� <br /> frd Herling <br /> ect Manager ✓� Page 24 <br />