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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233, <br /> Sequoia 404 N Wfget[arse Walnut Creek CA 94598 (925)988-9600 FAX(925)9198-9673 <br /> � Analytical 819 Striker Avenue Suite a Sacramento CA CA 95$34 (916)921-96FAX(916)92!-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0341 <br /> ettler RyanGeostrategies_ Client Prol ID 180138 85/6981, 4707 Pacific Sampled 10/14/98 <br /> 6747 Sierra Court Suite J Sample Descnpt TB-LB Received-10/14/98 _ <br />-- Dublin;CA-94568 Matrix-LIQUID -- <br /> Analysis Method 8015Mod/8020 Analyzed 10/22/98 <br /> Attention_Deanna Harding Lab Number 9810887-01 _ _____Reported 11 j02 j98_ <br /> 'nstrument 1D HP5 <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 /> Mealy! 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) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 93 <br /> • <br /> lnalytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41271 <br /> rod Granicher Page <br /> 'roject Manager <br />