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Sequoia 8ramentStriker Ave <br /> 958 4 <br /> Sacramento CA 95834 <br /> � Analy>ical <br /> (9 16)921 4600 <br /> FAX(916)921 0100 <br /> www sequoialabs corn <br /> =Stcj <br /> Project Former Unocal 5098, Stockton,CA <br /> 674 5308091 <br /> Project Number N/A Reported <br /> DuProject Manager Deanna L Harding 08/20/03 16 56 <br /> GasohnelBTEMOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> nalyte Result Limit Units Didution Batch Prepared Analyzed Method Notes <br /> NV-22S(S308091-27)Water Sampled 08/03/03 12 25 Received 08/05/03 17 35 <br /> IBenzene ND 050 ug/1 1 3080117 08/11/03 08/12/03 EPA 82608 <br /> oluene ND 0 50 11 11 „ <br /> thylbenzene ND 050 ” <br /> Xylenes(total) ND 050 " « <br /> Cethyl tert-butyl ether ND 2 0 " <br /> ogate 1,2-DCA-d4 108 % 60-140 <br /> ogate Toluene-d8 102 % 60-140it " <br /> rrogate 4-BFB 103 % 60-140 <br /> W-22D(5308091-28)Water Sampled 08/03/03 12 55 Received 08/05/03 I7 35 <br /> Benzene ND 050 ug/l 1 3080117 08/11/03 08/12/03 EPA 8260E <br /> thlenluene ND 050 11 11 <br /> ylbenzene ND 050 1. 11 <br /> es <br /> (total) ND 050 .. ._ <br /> Methyl tett-butyl ether ND 20 „ „ <br /> to 1,2-DCA-d4 Iib% 60-140 <br /> rrogate Toluene-d8 99% 60-140 <br /> Suri ogate 4-BFB 118% 60-140 <br /> W-23S(5308091-29)Water Sampled 08/04/03 13 55 Received 08/05/03 17 35 <br /> nzene ND 0 50 ug/l 1 3080141 08/12/03 08/13/03 EPA 8260B <br /> Toluene ND 050 " 11 „ <br /> 1pylbenzene ND 050 11 11 <br /> ]enes(total) ND 050 „ <br />.Methyl tett-butyl ether ND 2 0 11 „ <br /> rrogate 12-DCA-d4 101 % 60-140 <br /> Prrogate Toluene-d8 99 0 60-140 <br /> urrogate 4-BFB 101 % 60-140 ” » <br /> uoia Analytical - Sacramento The results m this report apply to the samples analyzed to accordance with the chain of <br /> • custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 19 of 1 I7 <br /> r �� <br />