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Sequoia 819 Striker Avenue Suite 8 ,!—D— Sacramenta CA 95834 (916)921-9600 Analytical FAX(916)921-0100 4V J www sequolalabs com Delta Environmental Consultants(Rancho Cordova Project Arco 2130, Stockton,CA 3164 Gold Camp Drive Ste 200 Protect Number N/A Reported Rancho Cordova CA,95670 Project Manager Jay Johnson 04/02/01 11 56 Volatile Oxygenate Compounds by EPA Method 8260A Sequoia Analytical - Sacramento Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes MW 1-35'(S]03323-01)Water Sampled 03/15/0109 37 Received 03/16/01 11 30 Tert-butyl alcohol ND 200 ug/l 1 1030379 03/28/01 03/28/01 EPA 8260A Methyi tert-butyl ether ND 2 00 Di-isopropyl ether ND 200 Ethyl tert-butyl ether ND 200 " Tert-amyl methyl ether ND 200 Surrogate 1,2-DCA-d4 868 % 60-140 �— MW 2-35'(5103323-02)Water Sampled 03/15/01 10 41 Received 03/16/01 11 30 Tert-butyl alcohol ND 200 ug/l 1 1030379 03/28/01 03/28/01 EPA 8260A Methyl tert-butyl ether ND 200 " Di-isopropyl ether ND 200 Ethyl tert-butyl ether ND 200 " Tert-amyl methyl ether ND 200 „ gate 1 2-DCA-d4 870 % 60-140 -- MW 3-36'(S103323-03)Water Sampled 03115/0108 01 Received 03/16/01 I1 30 Tert-butyl alcohol ND 200 ug/l 1 1030379 03/28/01 03/28/01 EPA 8260A Methyl tent-butyl ether ND 200 Di-isopropyl ether ND 200 Ethyl tert-butyl ether ND 200 " `Pert-amyl methyl ether ND 200 Surrogate 1,2-DCA-d4 912 % 60-140 �— MW 4-35' (5103323-04)Water Sampled 03/15/0107 I8 Received 03/16/01 11 30 Tert-butyl alcohol ND 200 ug/l 1 1030379 03/28/01 03/28/01 EPA 9260A Methyl tert-butyl ether ND 200 Di-isopropyl ether ND 200 Ethyl tert-butyl ether ND 200 Tert-amyl methyl ether ND 200 Surrogate 1,2-DCA-d4 936% 60-140 1a Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of custody docunient This analytical report must be reproduced in its entirety Page 6 of 14