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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 /> 819 Sinker 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)791-0342 <br /> ATC Associates, Inc Client Prod ID Ripon Unified School Sampled 09/21/98 - <br /> 1260 Graphics Drive Sample Descript RVSD-SB10-25 0 Received 09/22/98 <br /> Modesto, CA 95351-1502 Matrix SOLID Extracted 09/24/98 <br /> Analysis Method 8015Mod/8020 Analyzed 09/24/98 <br /> Attention Drew Van Allen Lab Number 9809E04-06 Reported 09f30f98 <br /> C Batch Number GC092498BTEXEXA -- <br /> Instrument ID GCHP01 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> tTPPH as Gas 10 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 /> Trlfluorotoluene 70 130 86 <br /> 4-Bromofluorobenzene 60 140 85 <br /> 1 <br />(alytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP #1210 <br />' T <br /> rolect ager Page 13 <br /> t <br />