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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Prol ID Ripon Unified School Sampled 09/21/98 <br /> 1260 Graphics Drive Sample Descript RUSO-SB10-W Received 09/22/98 <br /> Modesto, CA 95351-1502 Matrix LIQUID Extracted 10/02/98 <br /> Analysis Method EPA 8015 Mod Analyzed 10/03/98 <br /> Attention Drew Van Alien Lab Number 9809E49-03 Reported 10J06J98 <br /> D G <br /> Batch Number GC1002980HBPEXA <br /> entICHPknCstrum <br /> 5AA <br /> Total Extractable Petroleum Hydrocarbons (TEPH) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TEPH as Diesel 200 5300 <br /> Chromatogram Pattern <br /> Unidentified HC C9-C24 <br />' Surrogates Control Limits% % Recovery <br /> n-Pentacosane (C25) 50 150 5150 <br /> alytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP #1210 <br />' r � <br /> Vroject anager Page 9 <br />