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404 N Wiget Lane <br /> Walnut Creek,CA 94598 <br /> (DSpay y Ola (925)988-9600 <br /> L.. {.a FAx(925)988-9673 <br /> 4 0 vyww sequoialabs coin ' <br /> . Analytical <br /> Project Tosco <br /> E6747 <br /> ler Ryan,Inc -Dubhn Reported <br /> Sietra Court Suite 7ProlectNumber Tosco 11193lui CA,94568 <br /> Project Managerr Doug Lee 04-Jan-01 10 26 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Result Lliriit Units _J <br /> Analyte Level Result %REC Limits RPD Linut Notes <br /> Batch OL18009-EPA 5030B [PIT] <br /> Blank(OL18009-BLKl) Prepared 13-Dec-00 Analyzed 13-Dec-01 <br /> ND 20 ugli <br /> Ethylbenzene 2 0 „ <br /> Total Xylenes ND „ <br /> ND 20 <br /> 1,1 1,2-Tetrachloroethane 2 0 „ <br /> ND <br /> styrene ND 20 „ <br /> Y <br /> Brornoform 2 0 „ <br /> ND <br /> Isopropylbenzene 2 0 „ <br /> ND <br /> 1,1,2,2-Tetrachloroethane 20 - <br /> ND <br /> Bromobenzene 2 0 „ <br /> ND <br /> n-Propylbenzene 2 0 „ <br /> ND <br /> 1,2,3-Tnchloropropane ND 2 0 <br /> 2-Chlorotoluene ND 20 <br /> 1,3,5-Tnmethy(benzene <br /> - <br /> ND 20 <br /> 4-Chlorotoluene ND 2 0 <br /> Cert-Butyibenzene ND 20 „ <br /> 1,2,4-Trtmethylbenzene <br /> ND 20 <br /> sec-Butylbenzene <br /> ND 20 <br /> p-Isopropyholuene „ <br /> ND 20 <br /> 1,3-Dichlorobenzene <br /> ' ND 20 <br /> 1,4-Dichlorobenzene - ND 20 <br /> n-Butylbenzene <br /> ND 20 <br /> 1,2-Dichlorobenzene <br /> ND 50 <br /> 1,2-Dibromo-3-chloropropane „ <br /> ND 20 <br /> 1,2,4-Tnchlorobeazene <br /> ND 10 <br /> Naphthalene <br /> ND 14 " <br /> Hexachlorobutadiene 20 " <br /> 1,2,3-Trichlorobenzene ND <br /> 46 0 50 0 920 50-150 <br /> Surrogate Dbrornofluoromethane Soo <br /> 940 50-150 <br /> Surrogate 1,2 D 470�chloroethane-d4 500 " 500 100 50.150 <br /> Surrogate Toluene-d8 480 500 960 50-150 <br /> Surrogate 4-Bromofluorobernene <br /> The results:n this report apply to the samples analyzed to accordance with the chain of <br /> Sequoia AnalytlC8j-Walliut Creek custody document This analytical report must be reproduced in its entire* <br /> Page 16 of 27 <br />