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Sequoia 819 Striker Avenue,Suita 8 <br /> `; Sacramento,CA 95834 <br /> Analytical (916)921-9600 <br /> . FAX(916)921-0100 <br /> www.sequoialeLbs.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 07/16/01 15:54 <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 /> MW7-38'(S106453-01)Water Sampled:06128/01,05:20 Received:06128/01 13.40 <br /> Tert-butyl alcohol ND 200 ug/1 1 1070026 07/05/01 07/05/01 EPA 8260A <br /> Methyl tent-butyl ether ND 2.0 <br /> Di-isopropyl ether ND 2,0 <br /> Ethyl tert-butyl ether ND 2.0 <br /> Tert-amyl methyl ether ND 2.0 <br /> Ethanol ND 3000 <br /> 1,2-Dichloroethane ND 2.0 „ <br /> Ethylene dibromide ND 10 „ <br /> Surrogate:1,2-DCA-d4 110% 60-140 ^ <br /> MW8-38' 5106453-02 Water Sampled:06/28/0106:09 Received:06128/0113:40 <br /> Tert-butyl alcohol ND 5000 ug/l 25 1070026 07/05/01 07/05/01 EPA 8260A <br /> Methyl tert-butyl ether 1600 50 <br /> Di-isopropyl ether ND 50 <br /> Ethyl tert-butyl ether ND 50 „ <br /> Tcrt-amyl methyl ether ND 50 <br /> Ethanol ND 75000 <br /> 1,2-Dichloroethane ND 50 <br /> Ethylene dibromide ND 50 <br /> Surrogate:1,2-DCA-d4 108010 60-140 ^ H <br /> Mvv9-38' 106453-03 Water Sam led:06128/0105:153 Received:06/28/01 13:40 <br /> Tert-butyl alcohol ND 200 ug/1 1 1070026 07/05/01 07/05/01 EPA 8260A <br /> Methyl tert-butyl ether ND 2.0 <br /> Di-isopropyl ether 3.7 2.0 <br /> Ethyl tert-butyl ether ND 2.0 „ <br /> Tert-amyl methyl ether ND 2.0 <br /> Ethanal ND 3D00 <br /> 1,2-Dichloroethane 17 2.0 <br /> Ethylene dibromide ND 2.0 <br /> Surrogate:1,2-DCA-d4 115% 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. This analytical report must be reproduced in its entirety. <br /> Page Page 3 of 7 <br />