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404 N W1get Lane <br /> Walnut Geek.CA 94598 <br /> Sequoia (925)988-9600 <br /> 4(D FAX(925)988-%73 <br /> Analytical www sequoWabs cam <br /> Aw <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite 7 Project Number Tosco# 11194 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 11-Apr-0O 10 38 <br /> Volatile Organic Compounds by EPA Method 8240B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Luna Units Level Result %REC Luruts RPD Limit Notes <br /> Batch OC23010-EPA 5030B[PITT <br /> Blank(OC23010-BLK1) Prepared 8c Analyzed 22-Mar-00 <br /> Total Xylenes ND 20 ug/1 <br /> Styrene ND 20 " <br /> Bromofarm ND 20 " <br /> 1,1,2,2-Tabachlorodhane ND 20 " <br /> 1,3-Dichlorobenzene ND 20 " <br /> 1,4-Dichlorobenzene ND 20 " <br /> 1,2-Dichlorobenzene ND 20 " <br /> Surrogate Dibramofluoromedme 470 " 500 940 50-150 <br /> Surrogate 42-Dichlor,oethow-d4 S0.0 Soo 100 50-150 <br /> Surrogate Toluene-dg 500 500 100 50-150 <br /> Surrogate 4-Bromofluonobemene 490 500 9&0 50-150 <br /> 0(OC23010-BIM) Prepared&Analyzed 23-Mar-00 <br /> Chlom methane ND 20 ug/l <br /> Vmyl chloride ND 20 " <br /> Bromonm thane ND 50 " <br /> Chloroethane ND 20 " <br /> Trichlorofluoromethane ND 20 " <br /> 1,1-Dichlo methene ND 20 " <br /> Acetone ND 10 " <br /> Carbon.disulfide ND 20 " <br /> Methylene chlonde ND 10 " <br /> Mdhyl teatrbutyl ether ND 20 " <br /> traw-1,2-Dichlamoathene ND 20 " <br /> Vmyl acetate ND 50 " <br /> 1,1-Didiloroethane ND 20 " <br /> cis-1,2-Dichlotoethene ND 20 " <br /> 2-Butanone ND 10 " <br /> Chloroform ND 20 " <br /> 1,1,1-Trichloroethane ND 20 " <br /> Carbon tetrachloride ND 20 " <br /> Benzene ND 20 " <br /> 1,2-Dichlomethane ND 20 " <br /> Tnchloroethene ND 20 " <br /> 1,2-Dichlartopropane ND 20swia " <br /> Analytical-WaInxit Creek The results in this report apply to the samples analysed in accordmice with the chain of <br /> custody document Ties analytical report mast be reproduced in its entirety <br /> Page 14 of 21 <br />