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885 JarDrive <br /> a— ) Sequoia Morgan Hill,CAvis <br /> illCA 95037 <br /> Analytical FAX(408)77816308 <br /> www se uoialabs coo <br /> Secor-Rancho Cordova Project ARCO#2133,Rancho Cordova,CA <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#2133,Racho Cordova,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 10/21/02 17 13 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified,BTEXM by EPA 8021E- Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2JO8003-EPA 5030B [PIT] <br /> Matrix Spike 2.108003-MSl Source MLI0764-01 Prepared&Analyzed 10/08/02 <br /> Gasoline Range Organics(C6-C10) 419 50 ug/l 550 ND 762 60-140 <br /> Benzene 762 0 50 660 ND 115 60-140 <br /> Toluene 36 1 0 50 397 ND 909 60-140 <br /> Ethylbenzene 8 43 0 50 920 ND 916 60-140 <br /> Xylenes(total) 400 050 461 ND 868 60-140 <br /> Surrogate a a,a-Trifluorotoluene 949 100 949 70-130 <br /> Matnx Spike Du 2.108003-MSDI Source MLI0764-01 Prepared&Analyzed 10/08/02 <br /> Gasoline Range Organics(C6-C10) 435 50 ug(l 550 ND 79 1 60-140 3 75 25 <br /> Benzene 8 55 050 660 ND 130 60-140 It 5 25 <br /> Toluene 36 6 050 39 7 ND 922 60-140 1 38 25 <br /> Ethylbenzene 8 54 050 " 920 ND 928 60-140 1 30 25 <br /> Xylenes(total) 408 050 46 1 ND 88 5 60-140 1 98 25 <br /> ,Wurrogate a a a-Trifluorotoluene 11 8 100 118 70-130 <br /> Sequoia <br /> quota Analytical-Morgan Hill The results to this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in as entirety <br /> 14 of 15 <br />