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680 Chesapeake Drive Redwood City CA 94063 <br /> Sequoia (650)364-9600 FAX 650)364-9233 <br /> 404 N Wiget lane Walnut Creek.CA 94598 {925)988-9600 FAX(925)908-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9 21-0100 <br /> Analytical 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 /> ATC Associates, Inc Client Prof ID Ripon Unified School Sampled 01/27/99 <br /> 1117 Lone Palm Avenue Sample Descript RUSD-MW1-35 Received 01/29/99 <br /> Modesto, CA 95351-1502 Matrix SOLID <br /> Analysis Method 8015Mod/8020 Analyzed 02/05/99 <br /> Attention Drew Van Allen Lab Number 9901E94-02 Reported 03Y24199 <br /> kC Batch Number SP0205998020EXB <br /> nstrument ID HP-5 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br />'Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 1 0 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (total) 00050 N D <br /> Chromatogram Pattern <br />'Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 86 <br /> 1 <br /> t <br /> 1 <br /> nalytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP 461271 <br />,'rolect Manager Page 4 <br />