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' 680 Chesapeake Drive Redwood City CA 94063 650 364-9600 FAX(650)364-9233 <br /> Sequoia ( <br /> 404 H Wiget Lane Walnut Creek,CA 94598 (925)988-96D0 FAX(925)9$8-9673 <br /> �,1,� 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)792-0342 <br /> ATC Associates, Inc Client Prod ID Ripon Unified School Sampled 09/21/98 <br /> 1260 Graphics Drive Sample Descript RUSD-SB7-W Received 09/22/98 <br /> Modesto, CA 95351-1502 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 09/25/98 <br /> Attention Drew Van Allen Lab Number 9809E49-01 Reported 10j06198 <br /> kstr'unrient <br /> Batch Number GCO92598BTEX21A <br /> ID GCHP21 <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 0 50 N D <br /> Ethyl Benzene 050 N D <br />' Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br />' Surrogates Control Limits% % Recovenj <br /> Trlfluorotoluene 70 130 104 <br /> b <br /> 1 <br /> 1 <br /> 1 <br /> alytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP #1210 <br /> jro�ect anager Page 4 <br />