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364-9233 <br /> Redwood City,CA 94063 (650)364-9600 FAX(925)988-9673 <br /> 680 Chesapeake Drive 925 988-9600 FAX( ) <br /> SequoiaWalnut Creek CA 9459$ {916)921-9600 FAX(916)921-0100 <br /> 819 N Striker <br /> A Lane Sacramento CA 95834 ( ) <br /> 814 Striker Avenue Suite 8 792-1865 FAX(707)792-0342 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 {707) <br /> r <br /> E - - E Sampled 09/21/98 <br /> ATC Associates, Inc { Client Prof ID Ripon Un+#ted School Received 09/22/98 <br /> Sample Descrlpt RVSD-SBi 1-25 0 Extracted D9/24/98 <br /> 1260 Graphics Dave <br /> Modesto, CA 95351-1502 Matrix SOLID Analyzed 09/26/98 <br /> Analysis Method EPA 8015 Mod Reported 0930198 <br /> Attention Drew Van A11en Lab Number 9809E04-08� <br /> N N £ <br /> LC Batch Number GCO924980HBPEXA <br /> instrument i ) GCHP5A <br /> Total Extractable Petroleum Hydrocarbons (TEPH <br /> Detection Limit Sample Results <br /> mg/Kg <br /> Analyte mg/K9 <br /> 10 <br /> 10 <br /> TEPH as Diesel C9-C24 <br /> Chromatogram Pattern <br /> Unidentified HC % Recovery <br /> Control Limits%' 150 84 Surrogates 50 <br /> n-Pentacosane (C25) <br /> I <br /> ytes reported as N❑ were not present above the stated limit of detection <br /> Ua(QUOIA <br /> ANALYTICAL - ELAP #1210 <br /> r <br /> Page 18 <br /> roiect Manager <br />