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i <br /> MATRIX ENVIRONMENTAL LABORATORIES <br /> ' ANALYSIS; BTEX SPIKE SUMMARY <br /> ' CLIENT: Walsh & Associates <br /> CONTACT: J. Clayton Date Sampled: N/A <br /> ' COC No: 4071 Date Received: N/A <br /> Project No: WALSH 1585-010 Date Extracted: 8/9/93 <br /> Sample ID: N/A Date of Analysis: 8/10/93 <br /> ' Lab ID: LCS/LCSD Matrix: SOIL <br /> CONC CONC PERCENT <br /> COMPOUND SPIKED MEASURED RECOVERY <br /> mg/kg LCS LCSD LCS LCSD RPD <br /> (ppm) _ <br /> ' BENZENE 1. 0. 97 0.95 97% 95% 3% <br /> TOLUENE 1. 0.97 0.93 97% 93% 4% <br /> ` ETHYL BENZENE 1. 0. 96 0.92 96% 92% 4% <br /> ' TOTAL XYLENES 3 . 2. 89 2.78 96% 93% 4% <br /> LCS= LABORATORY CONTROL SPIKE <br /> LCSD= LABORATORY CONTROL SPIKE DUPLICATE <br /> RPD= RELATIVE PERCENT DIFFERENCE <br /> ' CONC= CONCENTRATION <br />