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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9Z1-oloo <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0341 <br /> 1 <br /> ATC Associates, Inc Client Prod ID Stkn USD Franklin High School Sampled <br /> 1117 Lone Palm Avenue Sample Descript Method Blank Received 03/01/99 <br /> Modesto, CA 9535 1-1 502 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/08/99 <br /> Attention Jeanne Homsey Lab Number 9903040-02 Reported 03/11199 <br /> 1013 Batch Number GC030899BTEX30A <br /> Instrument ID GCHP30 <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 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % %' Recove Trifluorotoluene 70 130 84 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> LEQUOIA ANALYTICAL - ELAP #1210 <br /> + Iii <br /> froject Manager Page 2 <br />