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• -1 404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 Analytical FAXequoalabscornwww <br /> i <br /> Gettler Ryan Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#6981 Reported <br /> Dublin CA 94568 Project Manager Scott Polston 13-Aug-01 07 25 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %RITC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1G27002- EPA 5030E PIT <br /> LCS(tG27002-BS2) Prepared&Analyzed 27-Jul-01 <br /> Benzene T 426 �0 10 rng/m'Air 400 106 70-130 <br /> Toluene 424 0 10 400 106 70430 <br /> Ethylbenzene 428 0 10 400 107 70-130 <br /> Xvienes(total) 119 0 10 120 992 70-130 <br /> Surrogate a a a-Trrfluorotoluene 580 600 96 7 70-130 <br /> LCS(1G27002-BS3) Prepared&Analyzed 02-Aug-01 <br /> Benzene 404 0 10 mg/ml Air 400 101 70-130 <br /> Toluene 396 0 10 400 990 70-130 <br /> Ethylbenzene 4 04 0 10 400 101 70-130 <br /> Xvlenes(total) 113 0 10 120 942 70-130 <br /> fS <br /> gate a a a-Triflirorotoluene 1$b " Tf600 97; '70-130 Dup(1G27002-BSDI) Prepared 26-Jul-01 Anahzed 02-Aug-01 <br /> Benzene - - - - 2 02 0 10 mg/m'Air 200 -------- 101- -70 130 4 04 25 --- <br /> Toluene 198 0 10 200 990 70-130 5 18 25 <br /> Ethvlbenzene 193 0 10 200 965 70-130 477 25 <br /> Xylenes(total) 544 0 10 600 907 70-130 490 25 <br /> Surrogate a a a-Trifluorotoluene -- - - ---5 46 -- — - - 600 -------910 70-130 <br /> nota Analytical- Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 6 of 9 <br />