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404 N Wlget Lane <br /> Sequoia Walnut Geek,CA 94598 <br /> (925)988-9600 <br /> FAX(925)98&9673 <br /> �111� Analytical wwwsec,uolalebs earn <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#4409 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 06-Feb-01 17 21 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Lurut Notes <br /> Batch 1A25002-EPA 5030B[PIT] <br /> Blank(1A25002-BLKI) Prepared&Analyzed 25-Jan-01 <br /> ?urgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> roluene ND 0 50 " <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 0 50 " <br /> ,Iethyl tert-butyl ether ND 2 5 " <br /> Surrogate qqa-Tnfluorotoluene 311 300 104 70-130 <br /> LCS(1A25002-BS1) Prepared&Analyzed 25-Jan-01 <br /> Benzene 225 050 ug/1 200 113 70-130 <br /> Toluene 225 0 50 200 113 70-130 <br /> Ethylbenzene 222 050 200 ill 70-130 <br /> Xylenes(total) 66 9 0 50 600 112 70-130 <br /> Surrogate qqa-Tnfluorotoluene 286 300 953 70.130 <br /> Matrix Spike(1A25002-MSI) Source W101427-01 Prepared&Analyzed 25-Jan-01 <br /> Benzene 216 0 50 ug/1 200 ND 108 70-130 <br /> Toluene 216 0 50 200 ND 108 70-130 <br /> Sthylbenzene 211 050 200 ND 106 70-130 <br /> Xylenes(total) 623 050 600 ND 104 70-130 <br /> Surrogate qqa-Tnfluorotoluene 311 300 107 70-130 <br /> Matrix Spike Dup (1A25002-MSDI) Source W101427-01 Prepared&Analyzed 25-Jan-01 <br /> Benzene 22 0 030 ugll 200 ND 110 70-130 1 83 20 <br /> Toluene 219 0 50 200 ND 109 70-130 138 20 <br /> Ethylbenzene 215 0 50 200 ND 108 70-130 1 88 20 <br /> Xylenes(total) 648 0 50 60 0 ND 108 70-130 3 93 20 <br /> Surrogate q q o-Tnfluorotoluenre 284 " 300 947 70-130 <br /> Sequoia Analytical-Walnut Creels The results in tins report apply to the samples analysed to accordance with the chain of <br /> custody document Thos analytical report must be reproduced on its enttretye <br /> Page 8 of 12 <br />