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Sequoia <br /> 'a u� a 680 Chesapeake Dnve Redwood City CA 94063 (650) 364-9600 FAX(650) 364 9233 <br /> J <br /> ,] q 404 N Wiget Lane Walnut Creek CA 94598 (925)988-960o FAX(9Z5)988 9673 <br /> Anaytxca 819 Striker Avenue Sucre 8 Sacramento CA 95834 (916)921 9600 FAX(916)921 0100 <br /> 6 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 792 1865 FAX(707)792 0342 <br /> 1 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 5153942 1300 Sampled <br /> 3468 Mt Diablo Blvd Ste 13100 Sample Descript Rinse Blank Received 08/20/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/24/98 <br /> Attention Christa Marting Lab Number 9808C98-23 Reported 09/04f98 <br /> C Batch Number GCO82498STEX30A <br /> �strument ID GCHP30 <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 N D <br /> Methyl t-Butyl Ether 2 5 N D <br /> Benzene 0 50 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) N D <br /> Chromatogram Pattern 0 5D <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 76 <br /> I <br /> ialytes reported as N D were not present above the stated limit of detection <br /> VOUOIA ANALYTICAL - ELAP #1210 <br /> avi <br /> I <br /> i <br /> C. Herling <br /> anager Page 9 <br />