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404 N Wlget Lane <br /> Sequoia Walnut Creek C94598 <br /> (925)988 8-9f 9600 00 <br /> Analytical FAX(925)alabs c 73 <br /> FAX <br /> sequoialahs coin <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J ProlectNumber Tosco#6981 Reported <br /> — Dublin CA;94568 _ Project Manager Scott Polston - _- — = 06-Oct-00 09 38 <br /> - - - - Total Purgeable Hydrocarbons (C&C12), BTEX and MTBE-by DHS-LUFT - Quality Control-- <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lirmt Units Level Result %REC Limits RPD Limit Notes <br /> Batch 0121004-EPA 50308 [PIT] <br /> Blank(0][21004-BLK1) Prepared&Analyzed 21-Sep-00 <br /> Purgeable Hydrocarbons ND 10 mglrrO Air <br /> Benzene ND 010 " <br /> Toluene ND 010 <br /> Ethylbenzene ND 010 " <br /> Xylenes(total) ND 010 " <br /> Methyl Cert-butyl ether ND 050 " <br /> Surrogate as a-TrrJluororoluene 538 600 897 70-130 <br /> LCS(0121004-BSI) Prepared&Analyzed 21-Sep-00 <br /> Benzene 164 0 10 mg/ml Air 200 82 0 70-130 <br /> Toluene 162 010 200 810 70-130 <br /> Ethylbenzene 159 0 10 2 00 795 70-130 <br /> Xylenes(total) 462 010 6 00 770 70-130 <br /> Surrogate a a a-Trii luorotoluene 514 600 8S7 70.130 <br /> LCS Dup (0121004-BSDI) Prepared&Analyzed 21-Sep-00 <br /> Benzene 193 0 10 mg/ml Air 200 965 70-130 162 25 <br /> Toluene 192 010 200 960 70-130 169 25 <br /> Ethylbenzene 190 0 10 200 950 70-130 178 25 <br /> Xylenes(total) 550 0 10 600 917 70-130 174 25 <br /> Surrogate aaa-Tr'rfluorotoluene 510 600 850 70-130 <br /> Sequoia Analytical-Walnut Creek The results rn tins report apply to the samples analyzed in accordance with the char <br /> custody document Tins analytical repor4 must be reproduced in its entr <br /> Page 5 of 7 <br />