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Sequoia 404 N Wiget Lane <br /> Walnut Creek CA 94598 <br /> 4D- (925)Analtical FAX 988-9600 <br /> (925)988-9673 <br /> 5 <br /> www sequoialabs com <br /> Gettler Ryan,Inc -Dublin L Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco# 11193 <br /> Dublin CA,94568 Protect Manager Dong Lee Reported <br /> 04-Jan-01 10 26 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source /RFC RPD <br /> Analyte Result Lunt Units Level Result /RFC Ltmtts RPD Lirut Notes <br /> Batch OL18009-EPA 5030B [PIT] <br /> Blank(OL18009-BLK2) Prepared&Analyzed 18-Dec-00 <br /> Ethylbenzene ND 20 ug/1 <br /> Total Xylenes ND <br /> 20 „ <br /> 1,1,1,2-Tetrachloroethane ND 20 " <br /> Styrene ND 2 0 „ <br /> l3romoform ND 20 „ <br /> Isopropylbenzene ND 20 <br /> 1,1,2,2-Tetrachloroethane - ND 20 - <br /> Bromobenzene ND 20 „ <br /> n-Propylbenzene ND 20 „ <br /> 1,2,3-Tnchloropropane ND 20 " <br /> 2-Chlorotoluene ND 20 -- <br /> J - <br /> 1,3,5-Tnmethylbenzene ND 2 0 4 <br /> 4-Chlorotoluene ND 20 <br /> tort-Butylbenzene ND 20 <br /> 1,2,4-Trnmethylbenzene ND i 2 0 „ <br /> z <br /> sec-Butylbenzene ND 20 " <br /> p-isopropyholuene - 2 0 <br /> 1,3-Dichlorobenzene ND 20 " <br /> 1,4-Dichlorobenzene ND 20 <br /> n-Butylbenzene ND 20 „ <br /> 1,2-Dichlorobenzene ND 20 " -- <br /> 1,2-Dlbromo-3-chloropropane ND S 0 " <br /> 1,2,4-Trichlorobenzenc ND 20 „ <br /> Naphthalene ND 10 „ <br /> Hexachlorobutadiene ND 10 „ <br /> 1,2,3-Thchlorobenzene ND 20 <br /> Surrogate D:bromoJluoromethane 480 50 0 960 50-150 <br /> Surrogate 1 2-Drchloroetham-d4 490 500 980 50-150 <br /> Surrogate Toluene-d8 Soo Soo 100 50-150 <br /> Surrogate 4-Bromofluorobernene 480 " 500 .960 50-150 <br /> Sequoia Analytical-Walnut Creek The results in this report apply 10 the samples analyzed in accordance with rhe chain of <br /> custody document This analytical repot?must be reproduced in Its enl1refy16 <br /> Page 18 of 27 <br />