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1551 Industrial Road <br /> San c rim.CA 94070-4111 <br /> 1 9600 <br /> Sequoia (650)Z32-%12 <br /> FAX(650)232'9612 <br /> www Sequoialatn com <br /> Analytical <br /> Gerlier-Ryan/C,eostrategtes(i) Project Tosco(5)-ZZ <br /> Project Number Tosco(Unocal)SS#6981 01 <br /> orted <br /> 6747 Stena Court,Suite] 01/l 1//01 13 54 <br /> Dublin CA,94568 Protect Manager Deanna Hardmg <br /> Volatile Organic Ozyganated S Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-San Carlos <br /> Reporting Spike Source %REC RPD <br /> Result <br /> lima Units Lcve1 Result %REC Lamits RPD lamtit Nates <br /> Batch 1010016-EPA 5030B IT <br /> Blank(101001K1) Prepared&Analyzed 01/04/01 <br /> Ethanol ND 1000 11811 <br /> 1,2-Dlbtomoeshaae ND 200 " <br /> 1,2-DichWoethane ND 200 " <br /> lx-noprvw ether ND 200 " <br /> Ethyl tertArutyl ether ND 200 " <br /> Methyl test-butyl ether ND 2 00 " <br /> Tart-amyl methyl ether ND 200 " <br /> Ted-butyl alcohol ND 100 " <br /> 44 9 500 898 76-114 <br /> surrogate 12-Drchloroethane-d4 " 300 992 88-110 <br /> Surrogate Toluene-d8 496A01 <br /> (1010016-BLK2) Prepared&Analyzed 01/05/01 <br /> Ethanol ND 1000 ug/1 <br /> 1,2-Mmmoethane ND 2 00 <br /> 1,2-lhchlorotxhane ND 200 " <br /> Ds- PYI ethea ND 200 " <br /> Ethyl tett-butyl ether ND 200 <br /> ND 200 <br /> Methyl tert-butyl ether " <br /> Teat-amyl methyl vdw ND 200 <br /> Tert-butyl alcohol ND 100 " <br /> 45 3 Soo 906 76-114 <br /> surrogate 1,1 Drchloroethane-d4 50 0 998 88-110 <br /> surrogate Toluene-d8 49 9 " <br /> LCS(i0;001frBS1) Prepared&Analyzed Al <br /> M�tdt-butyl ether <br /> 465 200 1194 50 0 93o 70-130 <br /> 46 3 50 0 926 76-114 <br /> surrogate 1,2 Drchtdroethane-d4 500 986 88-110 <br /> surrogate Toluene-d8 493 <br /> The results in this report apply to the samples analysed in accordance with the chain of <br /> 1a Analytical-San t:ar103 custody document This analytical report mast be reproduced rn its ent+rety <br /> Page 22 of 27 <br />