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404 N Wiget lane <br /> Sequoia Walnut Creek C94598 <br /> (925)9$8 8-9600 <br /> Analytical FAX(925)988-9673cornwww sequoialabs co <br /> Gettler Ryan, Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron 4 9-9840 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 07-Aug-01 15 35 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC APD <br /> Analyte Result Limit Units Level Result %RFC Limits RPD Limit Notes <br /> Batch I G30003- EPA 5030B P/T <br /> Blank(IC30003-BLK1) Prepared&Analyzed 30-Jul-01 <br /> Purgeable Hydrocarbons ND <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate aaa-Trtfluorotoluene __ 29 7 300 990 70-130 <br /> Blank(1G30003-BLK2) Prepared&Analyzed 31-Jul-01 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 0 50 " <br /> �e ND 0 50 <br /> nzene ND 050 <br /> Xylenes(total) ND 0 50 <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Triuorotoluene 300 300 100 70-130 <br /> Blank(1G30003-BLK3) Prepared&Analyzed 01-Aug-01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tent-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorwoluene 291 300 970 70-130 <br /> LCS(IG30003-BSI) Prepared&Analyzed 30-Jul-01 <br /> Benzene <br /> 205 0 50 ug/l 20 0 102 70-130 <br /> Toluene 213 0 50 20 0 106 70-130 <br /> Ethylbenzene 22 2 0 50 200 11 1 70-130 <br /> Xylenes(total) 662 0 50 600 110 70-130 <br /> Surrogate aaa-Tr'uorotoluene 299 300 99 7 70-130 <br /> S ta Analytical -Walnut Creek The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analylrcal report must be reproduced in its entirety <br /> Page 6 of 10 <br />