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4 N r <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)3649600 FAX(650)364-9233 <br /> ID404 N Wiget lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker 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 Prol ID Stockton Fire Station#2 Sampled 06/03/98 <br /> 1260 Graphics Drive Sample Descript MW-4 Received 06/04/98 <br /> Modesto, CA 95351-1502 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 06/09/98 <br /> „ Attention Jeanne Homsey Lab Number 9806259-03 Reported 06116198 <br /> QC Batch Number GC060998802005A - <br /> Instrument ID HP-5 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L. <br /> TPPH as Gas 50 N D <br /> Benzene 050 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 76 <br /> i <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41271 <br /> Pro ect Manager Page 6 <br />