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���® 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (D— (9 16)921-96W <br /> FAX(916)921-0100 <br /> *I&V <br /> Analytical <br /> www sequoialabs corn <br /> Stratus Environmental Project ARCO 2186,Stockton,CA <br /> 3330 Cameron Park Drive,Ste 550 ProjectNumber 2186,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 06/25/02 14 07 <br /> Volatile Organic Compounds by EPA Method 82605 <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-7(5206259-07)Water Sampled 06/19/02 06 21 Received 06/19/02 14 07 <br /> Tert-butyl alcohol ND 50 ug/l 1 2060275 06/21/02 06121!02 EPA 8260B <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 0 50 " <br /> 1,2-Dtchloroethane ND 0 50 <br /> Surrogate 1,2-DCA-d4 124% 60-140 " <br /> VW-1B(S206259-08)Water Sampled 06/19/02 09 06 Received 06/19/02 14 07 <br /> Tert-butyl alcohol ND 5 0 ug/l 1 2060275 06/21/02 06/21/02 EPA 8260E <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> -cert-amyl methyl ether 1 5 0 50 " <br /> 02-Dtchloroethane 16 - 050 -_ <br /> Surrogate 1,2-DCA-d4 119% 60-140 " <br /> VW-1B(S206259-08RE1)Water Sampled 06/19/020906 Received 06/19/021407 <br /> Methal tert-butyl ether 320 5 0 ug/I 10 2060282 06/24/02 06/24/02 EPA 82608 -- <br /> Surrogate 1,2-DCA-d4 116% 60-140 " <br /> VW-2B(S206259-09)Water Sampled 06/19/020729 Received 06/19/02 14 07 <br /> Ter -butyl alcohol ND 100 ug/l 20 2060275 0612I/02 06/21/02 EPA 82608 <br /> Methyl tert-butyl ether 370 10 " <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Tert-amyl methyl ether ND 10 " <br /> 1,2-Dtchloroethane ND 10 " <br /> ----- - --- --- —---- ---- ----------- --- <br /> Surrogate 12-DCA-d4 116% 60-140 " <br /> go - <br /> eduota Analytical.-Sacramento 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 /> ,p Page 7 of 13 <br />