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Sequoia 404 N ,CA Lane <br /> Walnut Geek,CA 94598 <br /> (925)988-9600 <br /> Analytical <br /> FAX(925)988-9673 <br /> Gettler-Ryan - Dublin Client Project ID Tosca SS#6981, Stockton Sampled Jul 15-16, 1999 <br /> 6747 Sierra Court, Suite J Sample Matrix Water Received Jul 16, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Aug 4, 1999 <br /> Attention Deanna Harding _ _ First Sample # 907-1236_____ <br /> 4 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX/ MTBE <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I.D. LD I D. I D. I D LD <br /> ,ug/L 907-1236 907-1237 907-1238 907-1239 907-1240 907-1241 <br /> MW-7 MW-8 MW-9 MW-11 VW-1 VW-3 <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D N D N D N D <br /> Benzene 050 N D N D N D N D N D N D <br /> Toluene 050 N D 060 N D N D N D N D <br /> Ethyl Benzene 0 50 N D N D N D N D N D N D <br /> Total Xylenes 050 066 N D N D N D N D N D . <br /> MTBE 2 5 260 N D N D N D N D 2,900 <br /> Chromatogram Pattern -- - <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 1 0 1 0 1 0 10 <br /> Date Analyzed 7/23/99 7/23/99 7/23/99 7/23/99 7/23/99 7/23/99 <br /> Instrument Identification HP-5 HP-2 HP-2 HP-2 HP-2 HP-2 <br /> Surrogate Recovery, % 88 96 96 95 99 97 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL,#1271 <br /> �L 0 <br /> ianne Fegley <br /> Project Manager <br /> 9071230 GET <2> <br />