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Sequoia 680 Chesapeake Drive Redwood City CA 94 (650)364-9600 FAX(550)364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 9459$98 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)79Z-034Z <br /> ATC Associates, Inc Client Prol ID Stockton Fire Station #2 Sampled 06/03/98 <br /> 1260 Graphics Drive Sample Descript MW-2 Received 06/04/98 <br /> Modesto, CA 95351-1502 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 06/09/98 <br /> Attention Jeanne Homsey Lab Number 9806259-02 Reported 06j16198 <br /> QC Batch Number GC060998802005A <br /> Instrument ID HP-5 <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 /> Trifluorotoluene 70 130 85 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1271 <br /> Project Manager Page 4 <br />