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Sequoia <br /> 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> ( 1 q L1 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 'J <br /> Analytical <br /> � 819 Stilker Avenue Suite 8 Sacramento CA 95834 (916)9,21-9600 FAX(916)921-0100 <br /> 1 final yti cal 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos, CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> I <br /> Cambria Client Proj ID Shell 341 Main St, Ripon Sampled 02/24/99 <br /> 1144 65th St Suite C Sample Descript CPT-11-48W Received 02/26/99 <br /> Oakland, CA 94608 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/08/99 <br /> Attention Owen Ratchye Lab Number 9902E25-02 Reported 03119199 <br /> QC Batch Number GC030899BTEX02A <br /> Instrument ID GCHP02 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br />' Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Tnfluorotoluene 70 130 84 <br /> 1 <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br />`SEQUOIA ANALYTICAL - ELAP 01210 <br /> Project Manager Page 3 <br />