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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento. CA 95834 <br /> (916)921-96W <br /> Analytical <br /> nalytic a 1 wFAX(916)921-0100 <br /> ,(-1 Ji/ [:L wwsequoia[abs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 5469, Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: NIA Reported: <br /> Cameron Park CA, 95682 Project Manager: Jay Johnson 10/01/01 15:20 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes / <br /> MW4-39' (5109223-04)Water Sampled:09114/0106:14 Deceived:09/14/01 10;17 R-05 <br /> Tert-butyl alcohol ND 2000 ug/l 10 1090294 09/27/01 09/27/01 EPA 8260B <br /> Di-isopropyl ether ND 20 ^ „ <br /> Ethyl tert-butyl ether ND 20 <br /> Tert-amyl methyl ether ND 20 <br /> 1,2-Dichloroethane ND 20 <br /> Ethylene dibromide ND 20 <br /> Surrogate: 1,2-DCA-d4 106% 60-140 <br /> MW4-39' (5109223-04RE1)Water Sampled: 09114/0106:14 Received:09/14/01 10:17 <br /> Methyl tert-butyl ether 24000 200 ag/l 100 1090308 09/28/01 09/28/01 EPA 8260E <br /> Surrogate: 1,2-DCA-d4 106% 60-140 <br /> MW5-39'(5109223-05)Water Sampled:09/1410106:51 Received:09/14/01 10:17 <br /> 0 butyl alcohol ND 2000 ug/l 10 1090294 09/27/01 09/27/01 EPA 8260B <br /> opropyl ether ND 20 <br /> Ethyl Cert-butyl ether ND 20 <br /> Tert-amyl methyl ether ND 20 <br /> 1,2-Diehloroethane ND 20 <br /> Ethylene dibromide_ _ ND _ 20 <br /> Surrogate: 1,2-DCA-d4 110% - — 60-140 <br /> MW5-39'(S109223-05RE1)Water Sampled:09/14/01 06:51 Received: 09/14/01 10:17 <br /> Methyl tert-butyl ether 16000 200 ug/l 100 1090308 09/2.8/01 09/28/01 EPA 8260B <br /> Surrogate: 1,2-DCA-d4 104% 60-140 " 4 <br /> 1I <br /> uoia Analytical - Sacramerata The results in This reporl apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> �I <br /> i <br /> Page 3 of 13 <br />