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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9Z33 <br /> 404 N Wiget lane Walnut Creek.CA 94598 (925)988-9600 FAX(92S)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 Stockton Fire#2 62574 0001/02 Sampled 09/22/98 <br /> _= 1260 Graphics Drive Sample Descript MW-2 Received 09/25/98 <br /> Modesto, CA 95351-1502 Matrix LIQUID <br /> = Analysis Method 8015Mod/8020 Analyzed 09/29/98 <br /> Attention Jeanne Homsey Lab Number 9809G80-02 Reported 10JO7198 „ <br /> QC Batch Number GC09299813TEX03A <br /> Instrument ID GCHP03 <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 50 N D <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 0 50 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xyienes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifl uorotol uene 70 130 91 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - EI_AP 41210 <br /> Project Manager Page 4 <br />