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4i) (9$19 Striker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834' <br /> Analytical FAX <br /> 16)921-01o0 <br /> (916)921-01o0 <br /> www sequoialabs co, <br /> Gettler-Ryan-Dublin Project Unocal 5098, Stockton, CA S210010 ' <br /> 6747 Sierra Court,Ste ) Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 10/14/02 18 46 ' <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-I (S210010-02)Water Sampled49/23/02 15 07 Received 09/26/02_18 35 <br /> 1,1-Dich loropropene ND 2 5 ugll 5 2100083 10/04/02 10/05/02 EPA 8260B <br /> Ethylbenzene 10 25 <br /> Hexachlorobutadiene ND 50 <br /> Isopropylbenzene 48 25 " <br /> p-Isopropyltoluene ND 25 <br /> Methylene chloride ND 5 0 <br /> Methyl tert-butyl ether ND 25 <br /> Naphthalene IS so <br /> n-Propylbenzene I1 25 <br /> Styrene ND 2 5 <br /> 1,1,1,2-Tetrachloroethane ND 2 5 <br /> 1,1,2,2-Tetrachlorocthane ND 5 0 <br /> Tetrachloroethene ND 2 5 <br /> Toluene 31 2 5 <br /> 1,2,3-Tnchlorobenzene ND 2 5 <br /> 1,2,4-Tnchlorobenzene ND 2 5 <br /> 1,1,1-Trichloroethane ND 2 S <br /> 1,1,2-Trichloroethane ND 2 5 " <br /> Trichloroethene ND 2 5 <br /> Tnchlorofluoromethane ND 2 5 <br /> 1,2,3-Trichloropropane ND 5 0 <br /> X1,2,4-Trimethylbenzene— —$ - <br /> 1,3,5-Trimethylbenzene 30 2 5 <br /> Vinyl phlonde - ---— ---- - --- ND -- - — 2 — <br /> Total Xylenes 71 2 5 „ <br /> Surrogate Dibromofluoronxethane— x 96% 70-130 <br /> Surrogate 1,2-DCA-d4 103 % 70-130 " <br /> Surrogate Toluene-d8 111 % 70-130 <br /> 'Surrogate -4=BFB`" __ _ -_ - 90%- -70-130- <br /> Sequoia <br /> 70-130_Sequoia Analytical - Sacramento The results 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 analytical report must be reproduced to its entirety <br /> Page 29 of 119 <br />