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w Sequoia680 Chesapeake Drive Redwood City CA 94063 (650) 364 9640 FAX(659)364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services Client Prod ID Shell Stockton/970905-F1 Sampled 09/05/97 <br /> 1680 Rogers Avenue Sample Descript Cal Trans Well #1 Received 09/05/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 09/08/97 <br /> Attention Fran Thie Lab Number 9709144-02 Reported 09JO9197 <br /> OC Batch Number GCO90897BTEX02A <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 200 280 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 20 N D <br /> Toluene 2 0 160 <br /> Ethyl Benzene 20 N D <br /> Xylenes (Total) 20 N D <br /> Chromatogram Pattern C7-C8 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 108 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQU A YTICAL - ELAP #1210 <br /> Peg y Penner <br /> Project Manager Page 10 <br />