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1455 McDowell Blvd North,Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> Analytical www <br /> (707)792-0342 <br /> sequaialabs corn <br /> 7DU <br /> tler-Ryan-Dublin Project Tosco <br /> 7 Sierra Ct,Suite I Project Number 2701 W March Lane,Stockton Ca Reported <br /> lin CA,94568 Project Manager Deanna Harding 02/15/01 10 28 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M18020M - Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result limit Units Level Result %REC limits RPD Limit Notes <br /> Batch 1020008-EPA 5030,waters <br /> Matrix Spike Dup(1 020008-MSD 1) Source P101685-01 Prepared&Analyzed 02/01/01 <br /> Gasoline 2510 500 ug/l 2750 ND 91 3 65-135 0 800 20 <br /> Benzene 365 0 500 320 ND 114 65-135 109 20 <br /> Toluene 183 0 500 193 ND 947 65-135 0 545 20 <br /> 6thylbenzene 484 0 500 460 ND 105 65-135 230 20 <br /> Xylenes(total) 236 0 500 231 ND 102 65-135 0 423 20 <br /> Methyl tert-butyl ether 630 250 52 0 ND 120 65-135 1 12 20 <br /> Surrogate a a a-Triuorotoluene 353 300 118 65-135 <br /> Surrogate 4-Bromofluorobenzene 319 300 106 65-1.35 <br /> �uola 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 entirely <br /> Page 10 of 19 <br />