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( (916Striker Ave Ste 8 <br /> D Sequoia Sacract amento CA 95834 <br /> rw Analytical <br /> )921 9600 <br /> FAX(916)921-0100 <br /> www sequoialabs com <br /> t� <br /> SECOR International-Rancho Cordova Project TOSCO 11193, Stockton,CA S306625 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/30/03 13 04 <br /> Gasoline (2-Methylpentane to 1,2,4-Tr>imethylbenzene) 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 /> Blank(3070114-BLKI) Prepared&Analyzed 07/08/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate a a a-Trtuorotoluene 944 100 94 60-140 <br /> Blank(3070114-BLK2) Prepared-&Analyzed_07109/03_ <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 0 50 " <br /> Methyl tent-butyl ether - - - ND 2 0 — - <br /> Surrogate a a a-Trifluorotoluene 933 100 93 60-140 <br /> Blank(3070114-BLK3)_ Prepared&-Analyzed 07/10103 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate a,a,a-Trti luorotoluene 866 100 87 60-140 <br /> Blank(1070114-BLK4) Prepared&Analyzed 07/14/03 <br /> Purgeable Hydrocarbons ND 50 ug/1 �^ <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate a a,a-Trifluorotoluene 8 79 100 88 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 enitrety <br /> Page 12 of 18 <br />