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EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> w_ n <br /> 500 Giuseppe Court, Suite 9 <br /> Roseville, CA 95678 <br /> Phone# (916) 773-3664 Fax# (916) 773-4784 <br /> ANALYSIS REPORT <br /> Attention Mr Todd Brown Date Sampled 04-16-97 <br /> Secor Date Received 04-18-97 <br /> 1390 Willowpass Road, Suite 360 MTBE Analyzed 04-23-97 <br /> Concord, CA 94520 <br /> Project 30710-001-01/Time Oil - Locke Ford Matrix Water <br /> Sample ID MW-1 <br /> Lab ID W0497170 <br /> Reporting Measured <br /> Compound Limit b Value(ppb) <br /> Methyl tert-Butyl Ether (MTBE) 5 5 7 <br /> ppb=Parts per billion=ug/l,=micrograms per liter <br /> ND—Not detected Compound(s)may be present at concentralrans below Site reporting limit <br /> Surrogate ReeoN erS- 1,2-Dtchloroethane dA =93% <br /> Dtbromolluorornethane =87% <br /> 1 oluene d-8 =98% <br /> 4-Bromofluorobenzene = 92% <br /> ANALYTICAL PROCEDURES <br /> MTBE— Methyl tert-Butyl Fther is measured ustrtg EPA Method 8260 which utilizes a purge and trap interfaced to a gas chromatograph (GC) <br /> ulurpped with a rimss¢pLctrometer <br /> 04-29-97 <br /> Date Reported <br /> 4oratory Representative <br /> i <br />