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404 N Wiget Lane <br /> Sequoia Walnut Creek C94598 <br /> (925)988 8-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequoialabs com <br /> OW <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco 4 6981 Reported <br /> Dublin CA,94568 Project Manager Scott Polston 02-Jan-01 18 17 <br /> Total Purgeable Hydrocarbons(C6-C12) and BTEX in Air by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Linut Units Level Result %REC Limits RPD Limit Notes <br /> Batch OL14004- EPA 5030E [PIT] <br /> Blank(OL14004-BLK1) Prepared&Analyzed 13-Dec-00 <br /> Purgeable Hydrocarbons ND 2 0 mglrri'Air <br /> Benzene ND 0 010 <br /> Toluene ND 0 010 <br /> Ethvibenzene ND 0 010 <br /> Xylenes(total) ND 0 010 " <br /> Surrogate a a a-Trt luorotoluene 542 600 903 70-130 <br /> BIank(OL14004-BLK3) Prepared&Analyzed 19-Dec-00 <br /> Purgeable Hydrocarbons ND 2 0 m&rn'Air <br /> Benzene ND 0 010 " <br /> Toluene ND 0 010JV " <br /> enzene ND 0 010 <br /> es(total) ND 0 010 " <br /> Surrogate a,a,a-Trifluorotoluene 596 600 993 70-130 <br /> LCS(OL14004-BSI) Prepared&Analyzed 13-Dec-00 Q-01 <br /> Benzene 102 0 010 mg/ml Air 200 510 65-120 <br /> Toluene t 0l 0 010 200 505 65-120 <br /> Ethylbenzene 0 966 0 010 200 483 65-120 <br /> Xylenes(total) 290 0 010 600 48 3 65-120 <br /> Surrogate a a a-Tnfluorotoluene 512 600 853 70.130 <br /> LCS(OL14004-BS3) Prepared&Analyzed 19-Dec-00 <br /> Benzene 334 0 010 ing m'Air 400 83 5 65-120 <br /> Toluene 334 0 010 400 83 5 65-120 <br /> Ethylbenzene 330 0 010 400 825 65-120 <br /> Xylenes(total) 9 88 0 010 120 823 65-120 <br /> Surrogate a a.a•Trtfluorotoluene 548 600 913 70430 <br /> ola Analytical-Walnut Creek The results to 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 8 <br />