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+ 819 Striker Avenue,Suite 8 <br /> li Sequoia Sacramento,CA 95834 <br /> A (916)921-9600 <br /> .i1a1CaI <br /> y www.sequoi abs•om <br /> Delta Environmental Con ultants(Cameron Park) Project: Arco 6100,Tracy,CA <br /> 3330 Cameron Park D,Ste 550 Project Number: NIA Reported: <br /> Cameron Park CA,95682Project Manager: Jay Johnson 09/24/01 17:12 <br /> f . <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> B <br /> ' <br /> B38-74 5109124-04 Soil''I Sampled:09/07/01 00:00 Received:09/10/0114:00 <br /> Ethanol ND 25 mg/kg 100 1I20011 09/20/01 09/20/01 EPA 8260B <br /> tert-Butyl alcohol ND 2.5 <br /> Methyl tert-butyl ether(MTBE) ND 0.10 <br /> Di-isopropyl ether ND 0.10 <br /> Ethyl tert-butyl ether ND 0.10 i <br /> 1,2-Dichloroethane ' ND 0.10 <br /> �. tert-Amyl methyl ether f ND 0.10 <br /> 1,2-Dibromoethane t ND 0.10 „ <br /> Surrogate:Dibromo/luoromethane 99.6% 50-150 " <br /> Surrogate:1,2-Dichloroethane-d4 103% 50-150 " <br /> B38-91 5109124-05 Soil Sam led:09/07/0100:00 Received:09/10/0114:00 <br /> Ethanol P ND 25 mg/kg 100 1120011 09/20/01 09/21/01 EPA 8260B <br /> tert-Butyl alcohol ND 2.5 <br /> Methy]tert-butyl ether(MTBE) ND 0.10 " <br /> # Di-isopropyl ether ; ND 0.10 " <br /> Ethyl tert-butyl ether ND 0.10 <br /> 1,2-Dichloroethane ND 0.10 <br /> i tert-Amyl methyl ether ND 0.10 <br /> 1,2-Dibromoethane ND 0.10 " » <br /> Surrogate--Dibromolluoromethone 100% 50-150 " <br /> } Surrogate:1.2-Dichloroethane-d4 104% 50-150 " <br /> B38-105 S109124-06 Soil'' Sam ied:09/07101 00.00 Received:09/10/0114:00 <br /> Ethanol ND 25 mg/kg 100 1I20011 09/20/01 09/21/01 EPA 8260$ <br /> tert-Butyl alcohol 1. ND 2.5 <br /> Methyl tert-butyl ether(MTBE) ND 0.10 <br /> Di-isopropyl ether ND 0.10 „ <br /> Ethyl tert-butyl ether ND 0.10 <br /> 1,2-Dichloroethane ND 0.10 <br /> tert-Amyl methyl ether ND 0.10 <br /> 1,2-Dibromoethane I ND 0.10 <br /> Surrogate:Dibromofluoromethane 113% 50-150 " <br /> Surrogate:1.2-Dichloroethane-d4 110% 50-150 <br /> l <br /> t <br /> I r. <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. This analytical report must be reproduced in its entirety. <br /> t <br /> Page Page 5 of 9 <br />