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i <br /> �c o� kboratavies <br /> . GROUND ZERO ANALYSIS, INC <br /> 1714 Main Street <br /> Escalon, CA 95320 <br /> Prol ID 329 Blank I QC Data Date(s)Analyzed 02125101 <br /> Site Knowles Roek 02/28/01 <br /> Method EPA 62808 <br /> ' Lab ID BLKB0225 BLKB0228 Reporting <br /> Sample ID Blank Blank Limit <br /> Matrix Water Water (u /L) <br /> 1 Methanol ND ND 500 <br /> Ethanal ND ND 250 <br /> ' t-Butanol(TBA) ND ND 20 <br /> ' Methyl-t-Butyl Ether(MTBE) ND ND 20 <br /> DI-Isopropyl Ether(DIPS) ND ND 20 <br /> ' Ethyl-t-Butyl Ether(ETBE) ND ND 20 <br /> t-Amyl Methyl Ether(TAME) ND ND 20 <br /> ' 1,2-Dlchloroethane(1,2-DCA) ND ND 20 <br /> ' 1,2-Dibromoethane(ED13) ND ND 20 <br /> QA/QC <br /> Surrogate Splke Recovery 108% 114% <br /> ' Matrix Spike Recovery Summary <br /> ' Percent Recovery <br /> Lab lD Client ID Analyte MS I MSD %RPD <br /> ' B02326 KR CB2-30 1,2-DCA 120 / 126 5 <br /> B02298 MW4-25' TAME 75 / 69 8 <br /> ' Laboratory Control Spike <br /> Lab ID Analyte Percent Recovery <br /> ' LC50228C MTBE 99 <br /> ND=Not detected at or above the reporting limit. <br /> water samples are reported in ug1L soil and sludge samples in mg/kg <br /> 3037 Fifth St, Ceres, CA 95307 0 Phone (209) 581-9280 • fax (209) 581-9282 <br />