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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento.CA 95834 <br /> (916)921-96W <br /> FAX{916}921-0100 <br /> Analytical www.sequoialabs.coahs.tom <br /> 0 <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 5469, Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: N/A Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 06/15/01 18:00 <br /> Volatile Oxygenate Compounds by EPA Method 8260A <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MWIO-36(5105448-01)Soil Sampled: 05/30/0109:50 Received:05/3110108:30 <br /> Tert-butyl alcohol ND 10 mg/kg l 1060013 06/04/01 06/04/01 EPA 8260A <br /> Methyl tert-butyl ether ND 0.10 ^ ^ <br /> Di-isopropyl ether ND 0.10 <br /> Ethyl tent-butyl ether ND 0.10 " <br /> Tert-amyl methyl ether ND 0.I4 <br /> 1,2-Dichloroethane ND 0.10 " ^ <br /> Surrogate: 1,2-DCA-d4 92.8% 60-140 -- <br /> MW10-51 (5105448-02)Soil Sampled:05/30/01 10:12 Received:05/31/0108:30 <br /> Tert-butyl alcohol ND 10 mg/kg 1 1060013 06/04/01 06/04/01 EPA 8260A <br /> Methyl tert-butyl ether 1.0 0.10 ^ <br /> Di-isopropyl ether ND 0.10 " ^ <br /> Ethyl ter -butyl ether ND 0.10 ^ <br /> Ankt-amyl methyl ether ND 0.10 <br /> -Dichloroethane ND 0.10 " ^ <br /> Surrogate: 1,2-DCA-d4 90.0% 60-140 " <br /> MWIO-56(5105448-03)Soil Sampled: 05/30/01 10:22 Received:05/31/0108:30 <br /> Tert-butyl alcohol ND 10 mg/kg 1 1060013 06/04/01 06/04/01 EPA 8260A <br /> Methyl tert-butyl ether ND 0.10 <br /> Di-isopropyl ether ND 0.10 <br /> Ethyl tert-butyl ether ND 0.10 <br /> Tert-amyl methyl ether ND 0.10 <br /> 1,2-Dichloroethane ND 0.10 <br /> Surrogate: 1,2-DCA-d4 — - - - 88.4% 60-140 <br /> uoia Analytical- Sacramento 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 /> Page2of8 <br />