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Sequoia 819 Sulker Avenue,55583 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)www.sequoialabs.com oo <br /> (.L wwwseg5olalaus.com <br /> • <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 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 /> MW6-38' (S109223-06)Water Sampled: 09/14/01 05:47 Received: 09/14/01 10:17 <br /> Tert-butyl alcohol ND 2000 ug/l 10 1090294 09/27/01 09/27/01 EPA 8260E <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether 22 20 <br /> 1,2-Dichloroethane ND 20 ^ <br /> Ethylene dibromide NO 20 <br /> Surrogate:1,2-DCA-d4 -- — 113% 60-140 " 4�— <br /> MW6-38' (5109223-06RE1)Water Sampled:09/14/01 05:47 Received:09/14/0110:17 <br /> Methyl tert-butyl ether _ 22000 200 ug/l 100 1090308 09/28/01 09/28/01 EPA 82606 <br /> Surrogate: 1,2-DCA-d4 105% 60-140 " <br /> MW7-39' (S 109223-07)Water Sampled: 09/14/0107:23 Received: 09/14/01 10:17 <br /> JiK-butyl alcohol ND 200 ugA 1 1090308 09/28/01 09/28/01 EPA 82608 <br /> yl tent-butyl ether NO 2.0 <br /> Di-isopropyl ether NO 2.0 <br /> Ethyl tert-butyl ether NO 2.0 " <br /> Tert-amyl methyl ether NO 2.0 <br /> 1,2-Dichloroethane NO 2.0 ^ " <br /> Ethylene dibromide_ NO 2.0 <br /> Surrogate: 1,2-DCA44 105%---� 60-140 11 „ <br /> MW8-39' (8109223-08)Water Sampled:09114/0108:14 Received: 09/14/01 10:17 <br /> Tert-butyl alcohol ND 20000 uV 100 1090308 09/28/01 09/28/01 EPA 8260B <br /> Methyl tort-butyl ether 7500 200 " 1. " " <br /> Di-isopropyl ether ND 200 1. " ^ " <br /> Ethyl tert-butyl ether NO 200 <br /> Tert-amyl methyl ether ND 200 " <br /> 1,2-Dichloroethane ND 200 <br /> Ethylene dibromide _ ND 200 <br /> Surrogate: 1,2-DCA-d4 — - 106% _ _ 60-140 -- -- " <br /> uoia Analytical -Sacramento The results in[his 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 4 of 13 <br />