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Sequoia <br />��-�.�.•'--�� Analytical <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />www.sequoialabs.com <br />Delta Environmental Consultants (Cameron Park) Project: Arco 6100, Tracy, CA <br />3330 Cameron Park Dr. Ste 550 Project Number: Arco 6100, Tracy, CA Reported: <br />Cameron Park CA, 95682 Project Manager: Jay Johnson 01/23/02 11:25 <br />Volatile Organic Compounds by EPA Method 82608 <br />Sequoia Analytical - Sacramento <br />Reporting <br />knalyte Result Limit Units Dilution Batch Prepared Analyzed Method Note; <br />D-1-6 (S201303-01) Soil <br />Sampled: 01/18/02 10:50 <br />Received: 01/18/02 15:50 R-05 <br />Tert-butyl alcohol <br />ND <br />1.0 mg/kg l 2010260 01/22/02 01/22/02 EPA 8260B <br />Methyl tert-butyl ether <br />2.7 <br />0.10 " <br />Di -isopropyl ether <br />ND <br />0.10 " <br />Ethyl tert-butyl ether <br />ND <br />0.10 " <br />Tert-amyl methyl ether <br />ND <br />0.10 " <br />Ethanol <br />ND <br />10 " <br />Surrogate: 1,2 -DCA -d4 <br />92.0% 60-140 " <br />D-2-3.6 (5201303-02) Soil <br />Sampled: 01/18/02 11:10 <br />Received: 01/18/02 15:50 R-05 <br />Tert-butyl alcohol <br />ND <br />2.0 mg/kg 2 2010260 01/22/02 01/22/02 EPA 8260B <br />Methyl tert-butyl ether <br />5.2 <br />0.20 " <br />Di -isopropyl ether <br />ND <br />0.20 " <br />Ethyl tert-butyl ether <br />ND <br />0.20 " <br />Tert-amyl methyl ether <br />ND <br />0.20 <br />Ethanol <br />ND <br />20 " <br />Surrogate: 1,2 -DCA -d4 75.6% 60-140 <br />D-3-3.6 (S201303-03) Soil Sampled: 01/18/02 11:25 Received: 01/18/02 15:50 R-05 <br />Tert-butyl alcohol ND 2.0 mg/kg 2 2010260 01/22/02 01/22/02 EPA 8260B <br />Methyl tert-butyl ether 1.8 0.20 " <br />Di -isopropyl ether ND 0.20 " <br />Ethyl tert-butyl ether ND 0.20 " <br />Tert-amyl methyl ether ND 0.20 " <br />Ethanol ND 20 " <br />Surrogate: 1,2 -DCA -d4 64.8% 60-140 11 11 11 11 <br />Sequoia 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 />Page Page 8 of 17 <br />