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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 /> Ana ytiea1 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0900 <br /> E455 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 Pro] ID Ripon Unified School Sampled 01/27/99 <br /> 1117 Lone Palm Avenue Sample Descript RUSD-MW3-35 5 Received 01/29/99 <br /> Modesto, CA 95351-1502 Matrix SOLID <br /> Analysis Method 8015Mod/8020 Analyzed 02/05/99 <br /> tAttention Drew Van Allen Lab Number 9901 E94-08 Reported 03f24f99 <br /> C Batch Number SP0205998020EXB <br /> Instrument 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 /> ISurrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 92 <br /> 1 <br /> Inalytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01271 <br />�ro]ect Manager Page 20 <br />