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1455 McDowell Blvd North Ste <br /> a— ) (707)Sequoia PetaEuma CA 949544 792-1865 <br /> IQF Analytical FAX(707)792-0342 <br /> www scyuoialahs coin <br /> Secor-Rancho Cordova Project Arco Site 2133 P306554 <br /> 3017 Kilgare Road Suite 100 Project Number 38982 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/02/03 18 02 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015B/8021B-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 3060704-EPA 5030,waters <br /> Matrix Spike Du (3060704-MSD1) Source P306429-01 Prepared&Analyzed 06/27/03 <br /> Gasoline Range Organics 2080 50 ug/l 2750 ND 76 65-135 4 20 <br /> Benzene 37 2 0 50 33 5 022 110 65 135 3 20 <br /> Toluene 201 0 50 202 0 15 99 65 135 0 5 20 <br /> Ethylbenzene 466 0 50 47 5 ND 98 65-135 0 6 20 <br /> Xylenes(total) 218 0 50 240 046 91 65-135 4 20 <br /> Methyl tert-butyl ether 141 2 5 545 89 95 65-135 7 20 <br /> Surrogate a a a-Trifluorotoluene 340 300 113 65-135 <br /> Surrogate 4-Bromofluorobenzene 280 300 93 65 135 <br /> Sequoia Analytical-Petaluma 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 /> bases This analytical report must be reproduced in its entirety <br /> Page 9 of 11 <br />