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1551 Industrial Road <br /> San moos,CA 94070-41 11 <br /> Sequoia (650)232-9600 <br /> FAX(650)232-9612 <br /> V,ww sequolaiabs com <br /> Analytical <br /> ■ M <br /> Project. Tosco(5)-ZZ <br /> Gettier-Ryan/Geostrategies(1) <br /> project Number Tosco(Unocal)SS#6981 Reported <br /> 6747 Sura Court,Suite 3 01/11/01 13 54 <br /> Dublin CA,94568 Project Manager Deanna Harding <br /> Volatile Organic Oxyganated 8 Compounds by EPA Method 8260B - Quality COU 0! <br /> Sequoia Analytical-San Carlos <br /> Mportra8 Sprke Source %REC RPD <br /> IA..ayte Result lumt Umts Level Result 0/.RFC lAmits RPD lxmrt Notes <br /> Batch 1010019-EPA 5030B PIT <br /> Blank(1010019-BLKS) Prepared&Analyzed 01/08/01 <br /> U0ND 1000 u <br /> Ethanol <br /> 1,2-Dlbtnmoethane ND 200 <br /> 1,2-Dtcblor,oethane ND 200 <br /> Di-mProPYI ether ND 200 <br /> Ethyl tort-butyl ether ND 200 " <br /> Methyl tett-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Tert-butyl alcohol ND 100 n <br /> 49 2 500 984 76-114 <br /> ,Surrogate 1,2-Drchloroethane-d4 50 0 980 88-110 <br /> Surrogate Toluene-d8 490 " <br /> 1010019-BSI) Prepared&Analyzed 01/05/01 <br /> Melbyl tert-butyl gyp, 418 200 ug/1 500 836 70-130 <br /> 49 9 50 0 99 8 76-114 <br /> Surrogate 1,1 Drchloroethaned4 " S0 0 103 88-110 <br /> Surrogate Toluene-d8 513 <br /> LCS(1010019-BS2) Prepared&Analyzed 01/08/01 <br /> Methyl tett-butyl ether 414 200 119/1 500 828 70-130 <br /> Soo 98 2 76-114Surrogate 1 2D491 chloroethane-d4 " SO 0 102 88-110 <br /> Surrogate Toluene-d8 511 <br /> matrix Spike(101OD19-MSl) Source L012210-18 Prepared&Analyzed 01/05/01 <br /> Methyl tett-butyl 407 2 00 ug/l Soo ND 814 60-140 <br /> 50 6 500 101 76-114 <br /> Surrogate 12 Dichloroetltane-4l4 988 88-110 <br /> Surrogate Toluene-d8 49 4 " SO 0 <br /> Matrix Spike Du (1010019-MSD1) Source L012210-18 Prepared&Analyzed 01/05/01 <br /> Methyl tett-butyl ether 41 l 200 U0 50 0 ND 822 60-140 0 978 25 <br /> 50 S 500 101 76-114 <br /> Surrogate 1,2-Drchloroedhane-4 Soo 102 88-110 <br /> Surrogate Toluene-0 508 " <br /> liOla Analytical-Sari Carlos The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Thar analytical report must be reproduced to its entirety <br /> Page 24 of 27 <br />