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. 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX(916)92 1 i <br /> Analytical www sequoialabs <br /> alabs cornm <br /> • <br /> Stratus Environmental Project ARCO 6100,Tracy,CA <br /> 3330 Cameron Park Drive,Ste 550 Project Number 6100,Tracy,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 10/21/02 17 41 <br /> BTEX by EPA Method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result IUmit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW-6(5209371-03)Water Sampled 09/18/02 07 56 Received 09/18/02 10 30 <br /> Ter -butyl alcohol 270 250 ug/l 50 2090241 09/23/02 09/23/02 EPA 8260E <br /> Methyl tent-butyl ether 300 25 " <br /> Di-isopropyl ether ND 25 " <br /> Ethyl tert-butyl ether ND 25 " <br /> Tert-amyl methyl ether ND 25 " <br /> Benzene 5500 25 <br /> Ethylbenzene ND 25 " <br /> Toluene 28 25 " <br /> Xylenes(total) 40 25 <br /> Gasoline(C6-CIO) 9800 2500 HC-22 <br /> Surrogate Toluene-d8 98% 60-140 ,----- —------______ <br /> Surrogate 4-BFB 97010 60-140 " <br /> Surrogate 1,2-DCA-d4 107% 60-140 <br /> uoia 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 3 of 6 <br />