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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364_9233 <br /> Sequoia 404 N W1get Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 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 /> • <br /> ATC Associates, Inc - Client Proj ID KOK Re 001 Sampled 09/11/98 <br /> 1280 Graphics Drive Sample Descnpt MW-1 Received 09/11/98 <br /> Modesto, CA 95351-1502 Matrix LIQUID <br /> Analysis Method 801 Mod/8020 Analyzed 09/23/98 <br /> Attention_ Jeanne Hornsey _ _ __Lab Number 980973 -01 _ _ _ Reported 09125198 <br /> QC Batch Number GCO92398BTEX21A - <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 500 1300 <br /> Methyl t-Butyl Ether 25 26 <br /> Benzene 50 400 <br /> Toluene so N D <br /> Ethyl Benzene 5 0 7 8 <br /> Xylenes (Total) 50 N D <br /> Chromatogram Pattern .. GAS <br /> Surrogates Control Limits % % Recovery <br /> TnHuorotoluene 70 130 103 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA L CAL - ELAP #1210 <br /> Project Manager Page 4 <br />