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a— —) (Blvd <br /> 707)1455 McDowell alue D <br /> SequoiaNorth StSequoia Petaluma CA94954 792 1865 <br /> Analytical FAX(707) 792 0342 <br /> i0 <br /> www sequoialahs com <br /> 5ecor-Rancho Cordova Project Arco Site 4932, Stockton,CA P312141 <br /> 3017 Kilgare Road Suite 100 Project Number [none] Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 12/22/03 14 28 <br /> Purgeable Hydrocarbons and BTEX by EPA 8O15B/8021B <br /> Sequoia Analytical- Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> EFF(P312141-08)Air Sampled 12/03/03 14 30 Received 12/03/03 15 40 <br /> Gasoline Range Organics ND 10 mg/ml Air 02 3 120 158 12/06/03 12/06/03 EPA <br /> 8015B180216 <br /> Benzene ND 010 " <br /> Toluene ND 010 " <br /> Ethylbenzene ND 010 " <br /> Xylenes(total) 0 16 0 10 " <br /> Methyl tert-butyl ether ND 040 " <br /> Surrogate a a a-Triuorotoluene 97% 65-135 " <br /> Surrogate 4-Bromoflucrobenzene 95% 65-135 " <br /> Gasoline Range Organics ND 2 8 ppmv 0 2 " <br /> Benzene ND 0 032 " <br /> Toluene 0 026 0 026 " <br /> 10thylbenzene ND 0 024 " <br /> ylenes(total) 0 037 0 024 " <br /> Methyl tert-butyl ether ND 0 11 " <br /> Surrogate a,a a-Triuorotoluene 97% 65-135 " <br /> Surrogate 4-Bromojluorobenzene 95% 65-135 " <br /> equoia 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 /> basis This analytical report must be reproduced in its entirety <br /> Page 5 of 16 <br />