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819 Sttlker Avenue Suite 8 <br /> Seouoia Sacramento C95834 <br /> (916)921 9600 <br /> FAX(916)9Z 1-0 100 <br /> *QF <br /> Analytical www sequoialabs com <br /> Stratus Environmental Project ARCO 2186,Stockton,CA <br /> 3330 Cameron Park Drive,Ste 550 ProjectNwnber 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 8260B <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW-313 (8206259-10)Water Sampled 06/19/02 08 44 Received 06/19/02 14 07 <br /> Tert-butyl alcohol 21 50 ugll 1 2060275 06/21/02 06/21/02 EPA 8260B <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tent-butyl ether 0 63 050 " <br /> Tert-amyl methyl ether 7 0 050 <br /> 1,2-Dichloroethane 28 050 <br /> Surrogate 12-DC4-d4 116% 60-140 " <br /> VW-313(S206259-10RE1)Water Sampled 06/19/62 08 44 Received 06/19/02 14 07 <br /> Nlethyl tent-butyl ether 1500 _ 10 ug/1 _20 2060282 06/24102__06/24/02----EPA 8260B <br /> Surrogate 1 2-DCA-d4 119% T 60-140 " <br /> Oe—quoia Analytical- Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 8 of 13 <br />