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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Fane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 1. (i) 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)79Z-0342 <br /> Blaine Tech Services Client Prol ID Chevron 9-4275/990310-Zi Sampled 03/10/99 <br /> 1680 Rogers Avenue Sample Descrlpt MW5 Received 03/11/99 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/23/99 <br /> Attention Christine Lillie Lab Number 9903653-05 - Reported 03f26j99 <br /> QC Batch Number GC032399BTEX02A <br /> Instrument 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 N D <br /> Methyl t-Butyl Ether 25 19 <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 0 61 <br /> Xylenes (Total) _ _ 050 _ - _N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 128 <br /> Analytes reported as N D were not present above the stated limit of detection Y - <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> I � i <br /> el Shin <br /> �ct Manager Page <br /> 9 <br /> I CG' <br />