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r <br /> ■1 4 <br /> S e q`a O i a - 404 N Wiget Lane <br /> [.l Walnut Geek CA 94598 <br /> (925)988-9600 <br /> FAX Analytical w sect olaJab 9673 <br /> www sequoialabs <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> -6747-Sterra Court-Suite J Project Number-Chevron 4 9-6171 Reported — <br /> Dubhn CA,94568 Project Manager Deanna L Harding 13-Jun-01 09 09 ` <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek r <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units _ Level Result %REC Limits RPD Linut Notes <br /> Batch-1E30001 -EPX5030B PIT <br /> Blank(1E30001-BLKI) Prepared&Analyzed 31-May-01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Melhyl tert-butyl ether ND 25 ! _ <br /> Surrogate qqa-Trrfluorotoluene 309 300 103 70-130 <br /> Blank(1E30001-BLK2) Prepared&Analyzed 01-Jun-01 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 <br /> Methyl tett-butyl ether ND 25 " <br /> Surrogate a4a-Tnfluorotoluene 319 300 106 70-130 <br /> Blank(1E3000I-BLK3) Prepared&Analyzed 02-Jun-01 <br /> Purgeable.Hydrocarbons - - ND -- 50— ug/1 - — ----- _ <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(tots!) ND 0 50 " <br /> Methyl tert-butyl ether ND 25 <br /> Surrogate a,a,a-Tnfluora[oluene 304 300 101 70-130 <br /> Blank(I E30001-BLK4) _ Prepared&Analyzed 04-Jun-01 - <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> $thylbertzene ND 050 " <br /> Xylenes(total) ND 050 <br /> Methyl tort-butyl ether ND 2 5 " <br /> Surrogate a 4 a-Tnfluorwoluene 308 300 103 70-130 <br /> Sequoia Analytical-Walnut Creels The results in this repon apply to the samples analysed in accordance with the chat <br /> custody document This analytical repo►4 must be reproduced in its entr <br /> Page 6 of 9 <br />