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4 <br /> 819 Stnkerr Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> y (916)921-9600 <br /> Analytical <br /> Thr FAX(9uosala -0100 <br /> www seqoialabs com <br /> or-Ryan-Dublin Project TOSCO 11192,Stockton,CA S305429 <br /> 7 Sierra Court,Ste J Project Dumber NIA , I {, 1 , ,,, Reported <br /> Dublin CA,94568 kiect Manager Deanna L Harding 05/29103'1 -. 05/29/03 17 15 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reportuig Spike Source %REC RPD <br /> Analyte Result Lunn Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3050475-EPA 5030B [EfjT _ <br /> Laboratory Control Sample(3050475-BSI) Prepared 05/27/03 Analyzed 05/28/03 <br /> Benzene 23 2 050 ug/l 25 0 93 70-130 <br /> Chlorobenzene 214 050 250 86 70-130 <br /> 1,1-Dichlomethene 227 050 25 0 91 70-130 <br /> Toluene 226 050 25 0 90 70-130 <br /> Tnchloroethene 203 0 50 25 0 81 70-130 <br /> Surrogate Dibromofluoromethane 240 250 96 70-130 <br /> Surrogate 12-DCA-d4 246 250 98 70-130 <br /> Surrogate Toluene-d8 151 250 101 70-130 <br /> Surrogate 4-BFB 204 250 82 70-130 <br /> t)la Analytical- Sacramento The results in this report apply to she 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 muss be reproduced in its entirety <br /> Page 22 of 23 <br />