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i <br /> r <br /> + w <br /> 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek.CA 94598 (510)988-9600 FAX(510)988-9673 <br /> �III� Analytical 14 McDowell <br /> 5 Avenue Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Slvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)742-4342 <br /> E-7 ME <br /> Gettler Ryan/Geostrategles Client Proi ID Chevron 9-6171, Stockton Sampled 05/11/98 "fli <br /> 6747 Sierra Court Suite J Sample Descript OW-1 Reserved 05/11/98 <br /> 1 Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 05/15/98 <br />' Attention Deanna Harding , Lab Number 9805584-08 Reported 06/02/98 <br /> ==-= <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 5o ... . . . 230 <br /> Methyl t-Butyl Ether 25 ... 64 <br /> Benzene 050 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Unidentified HC .. C6-C12 <br /> Surrogates Control Limits % % RecoveryfiEuorotoluene 70 130 90 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01849 <br /> A aft <br /> ory <br /> Project Manager Page 9 <br />