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404 N Wiget lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 <br /> FAX <br /> Analytical www seququolla6s 73 <br /> alabs c com <br /> r <br /> r-Rancho Cordova Project Arco <br /> Kilgore Rd,Ste #100 Project Number Arco#595, Stockton Reported <br /> ho Cordova CA,95670 Project Manager Clint Harms 07-Aug-01 13 12 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RAD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1G27018- EPA 5030E(MeOH) <br /> atrix Spike Dup(1G27018-MSD2) Source W107334-01 Prepared 26-Jul-01 Analyzed 28-Jul-01 <br /> ethyl tert-butyl ether 245 020 mglkg 250 ND 980 60-140 5 88 25 <br /> Surrogate Dibromofluoramethane 216 250 864 50-150 <br /> t-11,09-te 1 2-,Dichloroethane-d4 232 " 250 928 50-150 <br /> i <br /> I <br /> equota Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> 0 custody document This analytical report must be reproduced in its entirety <br /> I <br /> Page 14 of 15 <br />