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819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento, 95834 <br /> � (916))921-9600 <br /> ' Analytical FAX(916)921-0104 <br /> www sequotalabs coin <br /> elta Environmental Consultants(Cameron Park) Project ARCO 2186,Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Pro�ectNumber 2186,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Steve Carter 04/25/02 09 59 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Sacramento <br /> Rcportmg <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW1B 5203255-08 Water Sampled 03/14/02 08 05 Received 03/14/0211 35 <br /> Tert-butyl alcohol ND 5 0 ug/1 1 2030197 03/15/02 03/15/02 EPA 8260B <br /> Methyl tert-butyl ether 63 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 <br /> Tert-amyl methyl ether ND 050 " <br /> Surrogate 1 2-DCA-d4 788% 60-140 <br /> VW2B 5203255-09 Water Sampled 03/14/02 08 15 Received 03/14/02 11 35 <br /> Tert-butyl alcohol 20 50 ug/1 1 2030197 03/15/02 03/15/02 EPA 8260B <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 <br /> Tert-amyl methyl ether 25 050 <br /> Surrogate 12-DCA-d4 852% 60-140 <br /> VW2B(5203255-09REII Water Sampled 03/14/02 08 15 Received 03/14/02 11 35_ _ <br /> ethyl tert-butyl ether 320 50 ug/l 10 2030255 03/20/02 03/22/02 EPS,8260B <br /> rrogate 12-DCA-d4 752% 60-140 <br /> VW3B(5203255-10)Water Sampled 03/14/02 07 54 Received 03/14/02 11 35 <br /> Tert-butyl alcohol ND 5 0 ug/l 1 2030202 03/15/02 03/15/02 EPA 8260E - <br /> Methyl tert-butyl ether 26 050 " <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 0 50 <br /> Tert-amyl methyl ether ND 050 " <br /> Surrogate 1,2-DCA-d4 784% 60-140 " <br /> quota 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 7 of 13 <br />