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QUALITY ASSURANCE REPORT <br /> 2y, <br /> mw <br /> MATRIX SPIKE DUPLICATE RESULTS <br /> PA <br /> Client: Jeff Willett Lab Number: 24226-1 MSD <br /> Condor Earth Technologies, Inc. Collected: 06/18/01 <br /> 188 Frank West Circle, Ste. I Received: 06/20/01 <br /> Stockton, CA 95206 Matrix: Soil <br /> Project: Chevron Pipeline Sample Description: <br /> 2496J2-GP87-1 1.5' <br /> Project Number: 2496.12 Analyzed: 06/21/01 <br /> Collected by: JP Method: See Below <br /> CONSTITUENT Amount Spiked Amount Recovered Percent Relative Percent <br /> mg/kg mg/kg Recovery Difference` <br /> TOTAL PETROLEUM HYDROCARBONS <br /> Total Petroleum Hydrocarbons (C10-C34) 160. 134. 84 6 <br /> Percent Surrogate Recovery 85 <br /> ZymaX envirotechnology, Inc. is certified by CA Department of Health Services: Laboratory #1717 <br /> 'Relative Percent Difference of the spike and spike duplicate <br /> Note: Analyzed by GC/MS Combination. <br /> Note: Extracted by EPA 3550 on 06/20/01. <br /> Note: Analytical range is C10-C40. <br /> Note: Spiked with crude oil. <br /> Submitted by, <br /> ZymaX envirotechnology, Inc. <br /> SS3043 <br /> MSD #9 <br /> SS3043m.xls Michael Ng <br /> MN/jdm/dz/ss Assistant Lab Director <br /> 805.544.4696 >> <br /> kAAAAA/7vmn)6 iS,n r.nrn <br /> iax Citi�.544.32"-'c, <br />