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819 Striker Avenue,Suite 8 <br /> 5 e qu o i a Sacramento C 95834 <br /> (916)922 1-9600 <br /> //�� <br /> a FAX(916)921-0100 <br /> Analytical www sequoialabs eom <br /> • <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2168, Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Project plumber 2168, Stockton,CA Reported <br /> Cameron Park CA, 95682 Project Manager Steve Carter 12/21/0109 27 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Aname Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW2(Si 12083-04)Water Sampled 12106/0109 19 Received 12/06/01 1345 R-05 <br /> Tert-butyl alcohol ND 50 ug/l 10 1120238 12/19/01 12/19/01 BPA 9260B <br /> Methyl tent-butyl ether ND 5 0 " <br /> Di-isopropyl ether ND 50 " <br /> Ethyl tert-butyl ether NO 50 " <br /> Tert-amyl methyl ether ND 50 " <br /> 1,2-Dichloroethane —-- ND _r 50 -- <br /> Surrogate I 2-DCA-d4 122% 60-140 " <br /> MW3 (S112083-05)Water Sampled 12/06/0107 05 Received 12/06/01 13 45 R-05 <br /> Tert-butyl alcohol ND 1000 ug/l 200 1120238 12/19/01 12/19/01 EPA 9260B <br /> Methyl tert-butyl ether ND 100 " <br /> Di-isopropyl ether ND 100 " <br /> Ethyl tent-butyl ether ND 100 " <br /> rt-amyl methyl ether ND 100 <br /> ,2-Dichloroethane - - ND A 100 -- <br /> Surrogate 1 2-DCA-d4 118% 60-140 " <br /> MW4(5112083-06)Water Sampled 12/06/01 11 01 Received 12/06/01 13 45 R-05 <br /> Tert-butyl alcohol ND 5000 ug/l 1000 1120238 12/19/01 12/19/01 EPA 826013 <br /> Methyl tert-butyl ether ND 500 " <br /> Di-Isopropyl ether ND 500 " <br /> Ethyl tert-butyl ether ND 500 " <br /> Tert-amyl methyl ether ND 500 " <br /> 1 2-Dichloroeth_an_e _ ND 500 <br /> Surrogate 12-DCA-d4 _ - __- — - 123% 60-140 <br /> Adak <br /> equola 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 6 of 14 <br />