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1551 Industria},Road - <br /> Sequoia San Carlos CA 9407 -411 1 <br /> (650)232-9600 <br /> Analytical Fw equo labsc12 <br /> www sequoialabs Com <br /> Gettier-Ryan/Geostrategies(1) Project Tosco(5) Sampled 511100 <br /> 6747 Sierra Court,Suite D Project Number UNOCAL SS#8671 Received 511100 <br /> Dublin,CA 94568 Project Manager Deanna Harding Reported 5/15/00 <br /> �,6oanpo � rX, et o 82 �u <br /> ee(4 i n �' tin <br /> Date Spike Sample QC Reporting Limit Reoov RPD RPD <br /> Anal Analyzed Level Result Result Units Recov Lmstts % Limit % Notes"' <br /> Batch _0050010 _—_Date Prepared 5/3100__ — _ _Extraction Method: EPA 5030B <br /> Blank 0050010-BLK1 <br /> Tert-butyl alcohol 513/00 ND ug/I 100 <br /> Methyl Cert-butyl ether ND 2.00 <br /> M-tsopropyI ether " ND 2.00 <br /> Ethyl tert-butyl ether ND 2.00 <br /> Tert-amyl methyl ether ND 2.00 <br /> Surrogate 1,2-D:chloroethane-d4 " 500 510 760-114 104 <br /> LCS 0050010-BSI <br /> Methyl Cert-butyl ether 513100 500 451 119/1 700-130 902 <br /> Surrogate 1,2-Dichloroethane-& " 500 529 " 760-114 106 <br /> Matrix Spike 0050010-MSI L005014-03 - <br /> Methyl tert-butyl ether _ 513100 500 ND 496 ug/l 600-140 99.2 _ <br /> Surrogate 1,2 Dichloroethane-d4 500 506 760-114 101 <br /> Matrix„Spike Dun 0050010-MSD1 L005014-03 <br /> Methyl tert-butyl ether 513/00 500 ND 512 ug/1 600-140 102 250 2.78 <br />.Surrogate=1,2-D:chloroethane-d4 500- - __511 _76 0-114-104-- <br /> Sequoia <br /> -114 104 _Sequoia Analytical-San Carlos "Refer to end of report for text of notes and definitions <br /> Page 6 of 7 <br />