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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> Analytical (925' 988-9600 FAX(925)988-9673 <br /> 4Roy F Weston, Inc - Client Project ICS San Joaquin HSA Sampled Aug 10, 1999 <br /> 2300 Clayton Rd , Ste 1580 Sample Matrix Water Received Aug 11, 1999 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Aug 26, 1999 <br /> Attention Scott Lookingbdl First Sample# W908214-01 <br /> QC Batch Number GCO81799 GCO81799 GCO81799 <br /> 802002A 802002A 802002A <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX/ MTBE <br />' Reporting Sample Sample Sample <br /> Analyte Lima i D I.D. 1 D <br />' pg/L W908214-01 02 03 <br /> MW-9-GW MW-2A- MW-2A- <br />' Purgeable <br /> Hydrocarbons 50 N D 6,500 6,400 <br />' Benzene 050 N D 180 210 <br /> Toluene 050 N D N D N D <br /> Ethyl Benzene 050 N D N D N D <br /> lie <br /> Total Xylenes 050 N D 200 230 <br /> MTBE 25 ND ND ND <br />' Chromatogram Pattern Gasoline Gasoline <br />' Quality Control Data <br /> Report Limit Multiplication Factor 10 100 100 <br /> Date Analyzed 8/17/99 8/17/99 8/17/99 <br /> Instrument Identification HP-2 HP-2 HP-2 <br />' Surrogate Recovery, % 95 90 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 />' Janne Fegley <br /> Project Manager <br />' W908214 RF W <1> <br />