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Sequoia Walnut WiLane <br /> t Creek CAA 94598 <br /> (925)988 9600 <br /> FAX(925)988 9673 <br /> www sequoialabs com <br /> Rancho Cordova— - -- —Project -Arco <br /> 30 ilgore Rd Ste #10() Project Number Arco# 4932 Stockton Reported <br /> ancho Cordova CA,95670 Project Manager Rusty Benkosky 27-Jul-01 14 25 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> ;Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> -2,65'(W107244-07)Water Sampled 12-Jul-01 11 30 Received 13-Jul-01 13 35 <br /> -Butyl alcohol ND 20 ug/I 1 1G20011 24-Jul-01 25-Jul-01 EPA 8260B <br /> Methyl tert-butyl ether 4 7 2 0 " <br /> isopropyl ether ND 2 0 <br /> yl tert-butyl ether ND 2 0 " <br /> ten-Amyl methyl ether ND 2 0 " <br /> Dichloroethane 4 0 2 0 " <br /> ylene dibromide `-- - ND 20 - <br /> Surrogate Dibromofluoromethane 960% 50-150 <br /> rrogate 12-Dichloroethane-d4 960% 50-150 " <br /> 2,77'(W107244-08)Water Sampled 12.-Jul-01 14 00 Received 13-Jul-01 1335 <br /> ten-Butyl alcohol ND 20 ug/I 1 1G20011 24-Jul-01 24-Jul I EPA 8260E <br /> Ft <br /> hyl tent-butyl ether 7 8 20sopropyl ether ND 20 <br /> yl tert-butyl ether ND 20 " <br /> tert- yl methyl ether ND 20 <br /> loroethane ND 20 <br /> oy e dibromide ND 20 <br /> Surrogate Dibromofluoromethane 105% 50-150lrr " <br /> agate 1 2-Dichloroethane-d4 974% 50-150 " <br /> �quoia Analytical- Walnut Creek 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 15 <br /> r <br />