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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(92S)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)792-0342 <br /> ATC Associates, Inc Client Prod ID Ripon Unified School Sampled 09/21/98 <br /> 1260 Graphics Drive Sample Descript RUSD-SBIO-W Received 09/22/98 <br /> Modesto, CA 95351-1502 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 09/29/98 <br /> Attention Drew Van Allen Lab Number 9809E49-03 Reported 10J06J98 <br /> C Batch Number GC092998BTEX03A <br /> Instrument <br /> ID GCHP03 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br />' Analyte Detection Lima Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 88 <br /> Benzene 050 075 <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 094 <br /> Chromatogram Pattern <br /> Unidentified HC C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 95 <br /> 1 <br /> alytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP 41210 <br /> rrojeci!54a�nager��� <br /> Page 8 <br />