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1551 Industrial Road <br /> Sequoia San Carlos, CA 94070-4111 <br /> (650)232-9600 <br /> Analytical FAX(650)232-9612 <br /> t <br /> ttler-Ryan/Geos tegies(1) Project Unocal(1) Sampled 11/23/99 <br /> Ge <br /> 6747 Sierra Cosite D Project Number Unocal SS#0187/3ob#280045 Received 11/24/99 <br /> Dublin,CA 94568 Project Manager Deanna Harding Reported 12/10/99 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260A/Quality Control <br /> > _ Sequoia Analytical-,San Carlos _ t , N -�— <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> BlankLcontinued) 9120029-BLK1 <br /> Methyl tert-butyl ether 12/7/99 ND ug/l 2 00 <br /> Di-isopropyl ether ND 2.00 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether ND " 200 <br /> Surrogate 1,2-Dtchloroethane-d4 500 430 760-114 860 <br /> LCS 9120029-BS1 <br /> Methyl Cert-butyl ether 12/7/99 500 500 119/1 700-130 100 <br /> Surrogate 1 2-Dtchloroethane-d4 500 471 760-114 942 <br /> Matrix Spike 9120029-MSI L911275-10 <br /> Methyl tert-butyl ether 12/7199 500 ND 524 ug/i 60 0-140 105 <br /> Surrogate 1 2-Dichloroethane-d4 500 456 760-114 912 <br /> MSpike Due 9120029-MSD1 L911275-10 <br /> Methyl tert-butyl ether 12/7/99 500 ND 529 ug/! 60 0-140 106 25 0 0 94$ <br /> Surrogate 1 2-Dtchloroethane-d4 500 46 8 760-114 936 <br /> Sequoia Analytical-San Carlos Refer to end ojreport far text of notes and definitions <br /> Page 27 of 28 <br />