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.i 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> 4D (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> atus Environmental Project Arco 2130,Stockton,CA <br /> 330 Cameron Park Drive,Ste 550 Project Number 2130,Stockton,CA Reported <br /> Cameron Park CA,95682 Prosect Manager Jay Johnson 06/25/02 13 58 <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 /> MW-5(5206223-05)Water Sampled 06118/020756 Received 06/18/02 11 35 <br /> Tert-butyl alcohol ND 50 ug/I 1 - 2060248 06/20/02 06/20/02 EPA 82608 T <br /> Methyl tert-butyl ether 7 8 050 " <br /> Dl-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 <br /> Surrogate 1,2-DCA-d4 122% 60-140 " <br /> MW-6(5206223-06)Water Sampled 06/18/02 09 05 Received 06/18/0211 35 _ <br /> Tert-butyl alcohol ND 5 0 ugll 1 2060248 06/20/02 06/20/02 EPA 8260B <br /> Methyl tert-butyl ether ND 0 50 " <br /> Di-isopropyl ether ND 0 50 ol <br /> Ethyl tert-butyl ether ND 0 50 " ol <br /> Tert-amyl methyl ether ND 050 " <br /> Surrogate 1,2-DCA-d4 123% 60-140 " <br /> -ALW-7 5206223-07 Water Sampled 06/18/02 05 25 Received 06/18/0211 35 <br /> -butyl alcohol ND 5 0 ug/l 1 2060216 06/18/02 06/19/02 EPA 8260B <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 0 50 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 0 50 " <br /> Surrogate 1 2-DC.4-d4 107% 60-140 " <br /> uola 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 /> Page Page 6 of 10 <br />