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8 19 Sin k <br /> Ave Ste 8 <br /> Sequoia Sacram entorCA 95834 <br /> (916)921 9600 <br /> IIW Analytical FAX(916)9210100 <br /> www sequoialabs com <br /> ettler-Ryan-Dublin Project Former Unocal 5098,Stockton, CA S308091 <br /> 747 Sierra Court,Ste J Project Number N/A Reported <br /> Dubltn CA,94568 Project Manager Deanna L Harding 08/20/03 16 56 <br /> GasohneWEVOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> nalyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-25S(5308091-33)Water Sampled 08/04/03 11 50 Received 08/05/03 17 35 <br /> nzene ND 050 ug/1 1 3080141 08/12/03 08/13/03 EPA 8260E <br /> luene ND 050 <br /> Ethylbenzene ND 050 <br /> lenes(total) ND 050 <br /> ethyl tert-butyl ether ND 20 <br /> urrogate 1 2-DCA-d4 108% 60-140 " <br /> Surrogate Toluene-d8 99% 60-140 <br /> Irrogate 4-BFB 107% 60-140 <br /> W-25D(S308091-34)Water Sampled 08/04/03 12 30 Received 08/05/03 17 35 <br /> it nzene 057 050 ug/l 1 3080141 08/12/03 08/13/03 EPA 8260B <br /> luene 2 2 050 <br /> hylbenzene 58 050 <br /> Xylenes(total) 35 050 <br /> Oft tert-butyl ether ND 20 <br /> r agate 12-DCA-d4 103 f 60-140 ^ " <br /> Sui i agate Toluene-d8 101 % 60-140 <br /> It rogate 4-BFB 100% 60-140 " <br /> W-27(5308091-35)Water Sampled 08/05/03 11 35 Received 08/05/03 17 35 <br /> Benzene ND 050 ❑g/l 1 3080240 08/18/03 08/19/03 EPA 8260E <br /> uene ND 0 50 <br /> tlylbenzene <br /> ND 050 " <br /> Xylenes(total) ND 050 <br /> Oethyl tert-butyl ether ND 2 0 <br /> rtagate 1,2-DCA-d4 103% 60-140 <br /> urrogate Toluene-d8 99% 60-140 <br /> rt agate 4-BFB 102 °/a 60-140 " <br /> �a Analyli cal - Sacramento - The;esults in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analvdcal repot t must be reproduced in its entirety <br /> Page 21 of 117 <br /> r <br />