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a— ) Sequoia a 1455 McDowell Blvd, ,CA Ste Petaluma,CA 949544 <br /> qW Analytical FAX(7407)792 1865 <br /> (707)792 0342 <br /> WWW sequoialahs� <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P311302 <br /> 3017 Ugare Road Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 12/01/03 15 25 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch <br /> Prepared Analyzed Method Notes <br /> EFF(P311302-03)Air Sampled 11/13/03 14 00 Received 11/13/03 15 30 <br /> Gasoline Range Organics ND 10 mg/m'Air 02 3110312 11/14/03 11/14/03 EPA <br /> 8015E/80218 <br /> Benzene ND 010 <br /> Toluene ND 010 <br /> Ethylbenzene ND 0 10 " <br /> Xylenes(total) 0 23 0 10 <br /> Methyl tert-butyl ether ND 040 " <br /> Surrogate a a a-Triuorotoluene 100% 65-135 " ^ <br /> Surrogate 4-Bromofluorobenzene 94% 65-135 ^ ^ <br /> Gasoline Range Organics ND 2 8 ppmv 0 2 <br /> Benzene ND 0 032 " <br /> Toluene ND 0 026 " '+ <br /> Ethylbenzene ND 0 024 <br /> Xylenes(total) 0 053 0 024 " " " • <br /> Methyl tert-butyl ether ND Oil <br /> Surrogate a,a,a-Trtfluorotoluene 100% 65-135 " ^ <br /> Surrogate 4-Bromofluorobenzene 94% 65-135 ^ " <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed to accordance with the chain <br /> ojcusiody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its enttrety I* <br /> Page 5 of 15 <br />