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1 <br /> Sequoia <br /> Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364 9Z33 <br /> SeqUO1a 404 N Wiget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)911-9600 FAX(916)921 0100 <br /> Analytical <br /> t 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 /> Ground Zero Analysis, Inc Client Prol ID Knowles Roek Sampled 04/19/99 <br /> ' 1714 Main St Sample Descript KR Efflu Received 04/20/99 <br /> Escalon, CA 95320 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 04/21/99 <br /> Attention Greg Stahl Lab Number 9904784-02 Reported 04f23199 <br /> 'CC Batch Number GC042199BTEX02A <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 10 N D <br /> Benzene 010 N D <br /> Toluene 010 N D <br /> Ethyl Benzene 010 N D <br /> Xylenes (Total) 010 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> ' Tnfluorotoluene 70 130 92 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> ISEQUOMANAMICAL - ELAP #1210 <br /> 1 <br /> MelShi <br /> ect M ager Page 2 <br /> I <br />