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�aboratorfes <br /> Ground Zero Analysis, Inc <br /> 1714 Main Street Date(s)Sampled 12/06/01 <br /> Escalon, CA 95320 12107/01 <br /> Date Received 12107/01 <br /> Site Knowles Roek <br /> Prot ED Volatile Organics By GC/MS Date Analyzed 12113/01 <br /> Method EPA 8260E <br /> Lab ID B12065 612066 812067 912068(d) <br /> Sample ID KR MW-8 KR MW-10 KR MW-11 KR MW-14 <br /> Matrix Water Water Water Water <br /> t-Butanol(TBA) <20 <20 <20 <500 <br /> Methyl-t-Butyl Ether(MTBE) <2 0 10 31 34,000 <br /> DI-Isopropyl Ether(DIPE) <2 0 <2 0 <2 0 <50 <br /> Ethyl-t-Butyl Ether(ETRE) <2 0 <2 0 <2 0 <50 <br /> t-Amyl Methyl Ether(TAME) <2 0 <2 0 <2 0 <50 <br /> . 1,2-Dichloroethane(1,2-DCA) <2 0 16 41 370 <br /> 1,2-Dibromoethane(EDB) <2 0 <2 0 <2 0 <50 <br /> QA1QC <br /> Surrogate Spike Recovery 102% 99% 102% 103% <br /> (d) Salmple diluted due to high concentration of target analytes and/or high organic content <br /> Note Water samples are reported in pg1L soil and sludge samples in mg/kg <br /> U— <br /> Hiram <br /> Cueto <br /> Lab Director <br /> DNS Certification No 2359 <br /> 3037 Fifth St, Ceres, CA 95307 0 Phone (209) 581-9280 0 Fax (209) 581-9282 <br />