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Sequoia 680 Chesapeake Redwood City CA 94063 (650) 364-9600 FAX{650}364 9233 <br /> 404 N Wiget Lanea Walnut Creek.CA 9459$ (9Z5)988-9600 FAX{925}988-9673,. <br /> a-wAnalytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)92 1-MOO <br /> Io 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 792-1865 FAX(707)792-6342 <br /> Blame Tech Services Client Prol ID Shell 7910 Lower Sacramento Sampled 07/28/98 <br /> 1680 Rogers Avenue Sample Descript DUP Received 07/30/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> _ Analysis Method 8015Mod/8020 Analyzed 08/06/98 <br /> - Attention Fran Thie _ Lab Number 98071-180-04 _ _ Reported 08J19J98 <br /> QC Batch Number GC080698BTEX09A _ <br /> Instrument ID GCHP9 <br /> Total Purgeable Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> yg/L yg/L <br /> TPPH as Gas 50 N D <br /> Methyl t-Butyl Ether 25 52 <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 t 2 <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trlfluorotoluene 70 130 97 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANA ICAL - ELAP #1271 <br /> Peggy Penn <br /> Project Manager Page <br />