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SequoSequoia 819 Stnker Ave Ste 8 <br /> a Sacra mento916)92199600 <br /> w� Analytical834 <br /> FAX(916)9210100 <br /> www sequoialabs com <br /> SECOR International-Rancho Cordova Project TOSCO 11193,Stockton,CA 5304255 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 04/29/03 08 52 <br /> ___7 <br /> GasoLme\BTEX\Oxygenates by EPA method 8260B <br /> Sequoia Analytical -Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> -10(S304255-10)Water am l d 04107/03 18.15 Received 04/09/03 17 20 <br /> Benzene ND 050 ug/1 1 3040319 04/18/03 04/19/03 EPA 8260B <br /> Toluene ND 050 " <br /> Ethylbenzenc ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline(C6-C10) ND 50 A-01 <br /> Surrogate Toluene-d8 112% 60-140 " <br /> Surrogate 4-BFB 93% 60-140 " <br /> VW-1 (S304255-11)Water Sampled 04/07/03 18 40 Received 04/09/03 17 20 <br /> Benzene -ND ' 50 ugA 10 3040319 04/18/03 04/19/03 EPA 8260B R-05 <br /> Toluene ND 50 R-05 <br /> Ethylbenzene ND 50 " R-05 <br /> Xylenes(total) ND 5 0 R-05 <br /> Gasoline(C6-C10) ND 500 A-01,R-05 <br /> Surrogate Toluene-d8 107% 60-140 <br /> Surrogate 4-BFB 88% 60-140 " <br />_ OCTB(5304255-12)Water Sampled 04/07/03 00.00 Received 04/09/03 17 20 _ <br /> Benzene ND 0 50 ug11 1 3040335 04/21/03 04/21/03 EPA 82608 <br /> Toluene ND 050 11 11 " 11 " " <br /> Ethylbenzene <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate Toluene-d8 104% 60-140 " <br /> Surrogate 4-BFB 100% 60-140 " <br /> a ' <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of cuslody document Unless otherwise stated results are reported on a wet weight . <br /> basis This analytical report must be reproduced in its entirety <br /> Page 6 of 19 <br />