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ker Ave Ste 8 <br /> Sequoia Sacramento, <br /> mnto,CA9583 <br /> Sacramen[o,CA 95834 <br /> Analytical (916)921 9600 <br /> FAX(916) olor <br /> www sequoialabs corn <br /> SECOR International-Rancho Cordova Project TOSCO 11193,Stockton,CA S306625 <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/30/03 I3 04 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B-Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3070114-EPA 5030B(PIT) <br /> Laboratory Control Sample Dup(3070114-BSD1) Prepared&Analyzed 07/08/03 <br /> Benzene 9 29 0 50 ug/1 i0 0 93 70-130 3 25 <br /> Toluene 974 0 50 100 97 70-130 0 4 25 <br /> Ethylbenzene 974 0 50 100 97 70-130 3 25 <br /> Xylenes(total) 29 2 0 50 300 97 70-130 3 25 <br /> Methyl tert-butyl ether 103 2 0 to 0 103 70-130 6 25 <br /> Surrogate a a a-Trtuorotoluene 896 10 0 90 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 14 of 18 <br />