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404 N Wiget Lane <br /> Sequoia Walnut Greek,CA 94596 <br /> cz_ <br /> AnalyticaI (925)988-9600 <br /> FAX(425)988-9673 <br /> www sequoialabs c <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd,Ste #100 Project Number Arco#4932,Stockton Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 24-Jul-02 12 03 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical- Walnut Creek <br /> Reporting <br /> Analyte Result Lunat Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-11,30'(W206289-19)Soil Sampled 10-Jun-02 15 40 Received 14-.Tun-02 08 55 <br /> Purgeable Hydrocarbons(C6-C12) ND 10 mg/kg 20 2F19001 19-Jun-02 20-Jun-02 EPA 8015/8021 <br /> Benzene ND 00050 1. " " 1. " " <br /> Toluene ND 00050 <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 <br /> Methyl tert-butyl ether(MTBE) ND 0 050 <br /> Surrogate a a a-Tnfluorotoluene 813% 40-140 " <br /> MW-11,40'(W206289-20)Soil Sampled 10-Jun-0215 50 Received 14-Jun-02 08 55 <br /> Purgeable Hydrocarbons(C6-C12) ND 10 mg/kg 20 2F19001 19-Jun-02 20-Jun-02 EPA 8015/8021 <br /> Benzene ND 00050 <br /> Toluene ND 00050 <br /> Ethylbenzene ND 00050 <br /> Xylenes(total) ND 00050 <br /> Methyl tert-butyl ether(MTBE) ND 0 050 <br /> Surrogate a,a,a-Trtfluorotoluene 843% 40-140 <br /> DMW-2,10'(W206289_-21)Soil Sampled 11-Jun-02 09 00 Received 14-Jun-02 08 55 <br /> Purgeable Hydrocarbons(C6-C12) ND 10 mg/kg 20 2F20001 20-Jun-02 21-Jun-02 EPA 8015/8021 <br /> Benzene ND 00050 <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 <br /> Xylenes(total) ND 00050 <br /> Methyl tert-butyl ether(MTBE) ND 0 050 <br /> Surrogate aa a-Tnfluorotoluene 847% 40-140 " <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 9 of 38 <br />