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QUALITY ASSURANCE REPORT <br /> Zy MATRIX SPIKE DUPLICATE RESULTS <br /> Client: Jeff (Willett Lab Number: 24163-17 MSD <br /> Condor Earth Technologies, Inc. Collected: 06/13/01 <br /> 188 Frank West Circle, Ste. I Received: 06/14/01 <br /> Stockton, CA 95206 Matrix: Soil <br /> Project: Chevron Pipeline Sample Description: <br /> 2496J 1-G P51-6.5' <br /> Project Number: 2496J1 Analyzed: 06/19/01 <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 /> S Total Petroleum Hydrocarbons (C10-C32) 160. 135. 84 10 <br /> Percent Surrogate Recovery 86 <br /> r <br /> I 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 06/15/01. <br /> Note: Analytical range is C10-C40. <br /> Note: Spiked with crude oil. <br /> Submitted by, <br /> ZymaX envirotechnology, inc. <br /> SS3034 <br /> MSD #9 <br /> SS3034m.xls Michael Ng <br /> MN/jdm/dz/yl/ws Assistant Lab Director <br /> a•. <br /> 805.544.4696 ` <br /> Srn7 tv,�1lsn "a4G <br /> VVWW.,-yrnaXusa.com <br />