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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wlget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 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)792-0342 <br /> i <br /> Blaine Tech Services Client Prod ID Chevron 9-4275/990310-Z1 Sampled 03/10/99 <br /> 1680 Rogers Avenue Sample Descrlpt MW7 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 9903653-07 _ Reported 03J26J99 <br /> GSC Batch Number GC032399BTEX02A <br /> Instrument ID GCHP02 l <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 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) - - - v - 050 - _ N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Triffuorotofuene 70 130 123 <br /> Anaiytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> ct Shin <br /> ect Manager Page 7 <br /> T <br />