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QUALITY ASSURANCE REPORT <br /> Zy SPIKE DUPLICATE RESULTS <br /> 1 Client: Lab Number: QSD VS110619 <br /> ZymaX envirotechnology, inc. Collected: <br /> 71 Zaca Lane, Suite 110 Received: <br /> San Luis Obispo, CA 93401 Matrix: Soil <br /> Project: Sample Description: <br /> Quality Assurance Spike Duplicate <br /> Project Number: Analyzed: 06/19/01 <br /> Collected by: Method: EPA 8260 <br /> CONSTITUENT Amount Spiked Amount Recovered Percent Relative Percent <br /> mg/kg mg/kg Recovery Difference* <br /> . Benzene 0.015 0.015 100 7 <br /> Toluene 0.169 0.185 109 8 <br /> Ethyl benzene 0.044 0.047 107 4 <br /> Xylenes 0.233 0.248 106 5 <br /> f Percent Surrogate Recovery 101 <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 /> I Submitted by, <br /> ` ZymaX envirotechnology, inc. <br /> VS110619 <br /> MSD #11 <br /> f V110619q.xls Michael Ng <br /> MN/jgt/mn/mb Assistant Lab Director <br /> 805.544.4696 71 zaca Lone <br /> Son Luis Obispo CA 93401 <br /> www.ZvmaXusa.com fax 805.544.8226 <br />