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404 N WISet Lane <br /> Sequoia Walnut Creek)9�94� <br /> fAX(925)988.9673,..,__ <br /> Analytical www sequolalabs coin <br /> S <br /> l � <br /> Gettler Ryan,Inc -Dublin , Protect Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco# 11194 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 04-Jan-01 10 30 <br /> Volatile Organic Compounds 5'y EPA Method 8260B - Quality Control <br /> ,Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunn Units Level Result %REC Lnntts RPD Ltrrttt Notes <br /> Batch OL18009-EPA 5030B [PIT] - <br /> zea� r.r <br /> Blank(OL18009-BLKI) Prepared 13-Dec-00 Analyzed 13-Dec-01 <br /> Ethylbenzene ND 20 ug/l <br /> Total Xylenes ND 20 t <br /> 1,1,1,2-Tetrachloroethane ND 20 " <br /> Styrene ND 20 " <br /> Bromofoun ND 20 " <br /> Isopropylbenzene ND 20 " <br /> 1,1,2,2-Tetrachloroethane ND -20 r <br /> Bromobenzene ND 20 " <br /> n-Propylbenzene ND - 20 <br /> 1,2,3-Tnchloropropano ND 20 " <br /> 2-Chlorotoluene ND° 20 " <br /> 1,3,5-Tnmethylbenzene ND 20 <br /> 4-Chlorotoluene ND 20 " <br /> tert-Butylbenzene ND 20 " <br /> 1,2,4-Tnmethylbenzene ND 20 " <br /> sec-Butylbenzene ND 20 " <br /> p-Isopropyltoluene -- 20 - <br /> 1,3-Dichlorobenzene ND 20 " <br /> - ---_ _ �, e _ -------- <br /> 1,4-Dichlorobenzene -� -- -` <br /> ND—` 20 - <br /> n-Butylbenzene ND 2 0 " <br /> 1,2-Dichlorobenzene ND {' 20 - <br /> 1,2-Dibromo-3-chloropropane ND 50 " <br /> 1,2,4-Tnohlorobenzene ND 20 <br /> Naphthalene ND 10 " <br /> Hexachlorobutadtene ND 10 <br /> 1,2,3-Tnchlorobenzene ND 20 <br /> Surrogate Dibromofluoromethane 460 " 500 920 50-150 <br /> Surrogate 1 2 Dechlorvethane-d4 470 500 ' -940 50-150 <br /> Surrogate Toluene-d8 500 500 100 50.150 <br /> Surrogate 4-Bromofluoroberuene 480 500 960 50.150 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analysed in accordance with the chcan <br /> custody documera Thts analytical report must be reproduced in its enirr* <br /> Page 15 of 25 <br />