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1455 McDowell Blvd North,Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> FAX(707)792 0342 <br /> Analytical www sequoialabs com <br /> Gettler-Ryan-Dublin Project Tosco <br /> 6747 Sierra Ct,Suite J Project Number 2701 W March Lane,Stockton Ca Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 02/15/01 10 28 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M- Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %REC RPD <br /> LA.alyte Result limit Units Level Result %REC Lamas RPD Limit Notes <br /> Batch 1020008-EPA 5030,waters <br /> Blank(1020008-BLKl) Prepared&Analyzed 02/01/01 <br /> Gasoline ND 500 ug/1 <br /> Benzene ND 0 500 " <br /> 'toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND 2 50 " <br /> Surrogate a a a-Trifluorotoluene 324 300 108 65-135 <br /> Surrogate 4-Bromofluorobenzene 299 300 997 65-135 <br /> LCS(1020008-BSI) Prepared&Analyzed 02/01/01 <br /> Gasoline 2330 500 ug/I 2750 847 65-135 <br /> ofene 35 5 0 500 320 111 65-135 <br /> ne 179 0 500 193 927 65-135 <br /> Ethylbenzene 465 0 500 46 0 101 65-135 <br /> Xylenes(total) 228 0 500 231 997 65-135 <br /> Methyl tert-butyl ether 550 2 50 52 0 106 65-135 <br /> Surrogate a a a-Trifluorotoluene 356 300 119 65-135 <br /> Surrogate 4-Bromofluorobenzene 311 300 104 65-135 <br /> Matrix Spike(1020008-MSI) Source P101685-01 Prepared&Analyzed 02/01/01 <br /> Gasoline 2490 500 ug/I 2750 ND 905 65-135 <br /> Benzene 369 0 500 320 ND 115 65-135 <br /> Toluene 184 0 500 193 ND 953 65-135 <br /> Ethylbenzene 473 0 500 460 ND 103 65-135 <br /> Xylenes(total) 237 0 500 231 ND 103 65-135 <br /> Methyl ten-butyl ether 623 250 520 ND 119 65-135 <br /> Surrogate a a a-Trifluorotoluene 352 300 117 65-135 <br /> Surrogate 4-Bromofluorobenzene 319 300 106 65-135 <br /> uoia Analytical-Petaluma 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 its entirety <br /> Page 9 of 19 <br />