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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wlget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)9Z1-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd Borth Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettler RyariG6ostrrategies --- --�__-Client Proj ID UNOCAL 2859, Stockton--------- --- Sampled 06/18/98 y-= <br /> 6747 Sierra Court Suite J Sample Descnpt MW-9 Received 06/18/98 - <br /> Dublin, CA 94568 Matnx LIQUID - <br /> Analysis Method 8015Mod/8020 Analyzed 06/28/98 ' <br /> Attention Deanna Harding _-_ Lab Number 9806C90-10 Reported 07J10J98 <br /> QC Batch-Number GC062898802002A <br /> Instrument ID HP-2 <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 ... 76 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Tnfluorotoluene 70 130 97 <br /> 0 <br /> Analytes reported as N D were not present above the stated lima of detection <br /> SEQUOIA ANALYTICAL - ELAP 01271 <br /> Tc <br /> anicher T <br /> Pr Manager Page 10 <br /> rr^, <br />