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Sequoia 404 N CA Lane <br /> Walnut Creek CA 94598 <br /> (925)988-9600 <br /> a- —N Analytical FAX(92 otalab 9673 <br /> www sequolalabs corn <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sterna Court Suite J Project Number Chevron#9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harduig 12-Mar-O 107 45 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015N1/8020M - Quality Control <br /> Sequoia Analytical - Petaluma <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result Lumt Units Level Result %REC Ltnuts RPD Lumt Notes <br /> Batch 1020684-EPA 5030,waters <br /> Blank(1020684-BLKI) Prepared&Analyzed 27-Feb-01 <br /> Gasoline ND 500 ug/I <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 <br /> Methyl tent-butyl ether ND 2 50 " <br /> Surrogate 4ga-Trrfluorotoluene 317 300 106 65-135 <br /> Surrogate 4-Broinofluorobemene 297 300 990 65-135 <br /> LCS(1020684-BSI) Prepared&Analyzed 27-Feb-01 <br /> Gasohne 2130 500 ug/I 2750 775 65-135 <br /> Benzene 343 0 500 120 107 65-135 <br /> Toluene I78 0 500 193 922 65-135 <br /> Ethylbenzene 427 0 500 460 928 65-135 <br /> Xylenes(tom) 219 0 500 231 948 65-135 <br /> Methyl tert-butyl ether 553 250 520 106 65-135 <br /> Surrogate qt4a-Trtfluorotoluene 354 300 118 65-135 <br /> Surrogate 4-Bromofluorobemene 299 300 997 65-135 <br /> Matrix Spike(1020684-MSI) Source P102620-07 Prepared&Analyzed 27-Feb-OI <br /> Gasolme 2300 500 ug/1 2750 ND 824 65-135 <br /> Benzene 350 0 500 320 ND 109 65-135 <br /> Toluene 178 0 500 193 ND 92 1 65-135 <br /> Ethylbenzene 437 0 500 460 ND 95 0 65-135 <br /> Xylenes(total) 223 0 500 231 ND 965 65-135 <br /> Methyl tent-butyl ether 179 250 520 116 121 65-135 <br /> Surrogate aaa-Trifluorotoluene 351 300 117 65-135 <br /> Surrogate 4-Bromofluorobemene 312 300 104 65-135 <br /> Sequoia 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 ity entirety 0 <br /> Page 23 of 25 <br />