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QUALITY ASSURANCE REPORT <br /> Zy SPIKE DUPLICATE RESULTS <br /> Client: Lab Number. QSD VA70630 <br /> ZymaX envirotechnology, inc. Collected: <br /> 71 Zaca Lane, Suite 110 Received: <br /> San Luis Obispo, CA 93401 Matrix: Aqueous <br /> Project: Sample Description: <br /> Quality Assurance Spike Duplicate <br /> Project Number: Analyzed: 06/30/01 <br /> Collected by: Method: See Below <br /> CONSTITUENT Amount Spiked Amount Recovered Percent Relative Percent <br /> ug/L ug/L Recovery Difference' <br /> Benzene 3.0 2.9 94 13 <br /> Toluene 33.8 30.0 89 12 <br /> Ethylbenzene 9.0 7.6 85 5 <br /> Xylenes 46.7 38.5 82 5 <br /> Percent Surrogate Recovery 101 <br /> TOTAL PETROLEUM HYDROCARBONS <br /> Gasoline 500. 464. 93 12 <br /> 6TX as a Percent of Fuel 17 15 <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 EPA 8260 and GC/MS Combination. <br /> Submitted by, <br /> ZymaX envirotechnology, inc. <br /> VA70630 <br /> MSD #7 <br /> VA70630q.xls Michael Ng <br /> MN/jdm/bc Assistant Lab Director <br /> e <br /> 805.544.4696 71 Zaca Lane <br /> San Luis.ZymaXusa.com f—An <br /> VwwV 'ea ATM <br />