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Sequoia 404 N ,CA lane <br /> Walnut Creek,CA 94598 <br /> 4,-!D- (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> r� = - - r <br /> Oettler-Ryan - Dublin Client Project ID Tosco 88#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# 907-1230 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS wth,BTEX( MTB-E " <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I.D. I D 1 D LD I D. I D <br /> pg/L 907-1230 907-1231 907-1232 907-1233 907-1234 907-1235 <br /> TB-LB MW-1 MW-2 MW-4 MW-5 MW-6 <br /> Purgeable <br /> Hydrocarbons 50 N D N D 620 N D N D N D <br /> Benzene 050 N D N D 130 N D N D N D <br /> Toluene 050 N D N D N D N D N D N D <br /> Ethyl Benzene 050 N D N D 51 N D N D N D <br /> .Total Xylenes 050 N D N D 17 N D N D N D <br /> MT8E 25 ND ND 120 32 ND ND <br /> Chromatogram Pattern - - Gasoline - - <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 50 10 1 0 10 <br /> Date Analyzed 7/23/99 7/23/99 7/26/99 7/23/99 7/23/99 7/23/99 <br /> Instrument Identification HP-5 HP-5 HP-2 HP-5 HP-5 HP-5 <br /> Surrogate Recovery, % 90 88 104 99 96 86 <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 /> u anne Fegley <br /> ofect Manager <br /> 9471230 GET <1> <br />