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I <br /> (� 404N Wiget Lane <br /> Sequoia WalnutCr(925)9cck,CA 99600 <br /> q (925)988 9600 <br /> Analytical FAX(925)988-9673 <br /> WWW seouOialks cart <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd,Ste #100 Project Number Arco#2133,Stockton Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 14-Aug-02 13 16 <br /> Diesel Hydrocarbons (C10-C23) by DHS LUFT - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2G30017-EPA 3550A <br /> Blank(2G30017-BLK2) Prepared&Analyzed 05-Aug-02 <br /> Diesel Range Hydrocarbons(C 10-C28) ND 50 mg/kg <br /> Surrogate n-Octacosane 313 333 940 50-150 <br /> LCS(2G30017-BS2) Prepared&Analyzed 05-Aug-02 <br /> Diesel Range Hydrocarbons(C10-C28) 132 50 mg/kg 150 880 60-140 <br /> Surrogate n-Octacosane 194 " 333 883 50-150 <br /> Matrix Spike(2G30017-MSI) Source W207416-03 Prepared 30-Jul-02 Analyzed 01-Aug-02 <br /> Diesel Range Hydrocarbons(C 10-C28) 144 50 mg/kg 167 59 509 50-150 <br /> Surrogate n-Octacosane 239 333 718 50-150 <br /> Matrix Spike Dup(2G30017-MSDI) Source W207416-03 Prepared 30-Jul-02 Analyzed 01-Aug-02 <br /> Diesel Range Hydrocarbons(C 10-C28) 146 50 mg/kg 167 59 52 1 50 150 138 50 <br /> •Surrogate n Octacosane 239 " 333 718 50-150 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 12 of 20 <br />