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MATRIX ENVIRONMENTAL LABORATORIES <br /> ANALYSIS• BTEX SPIKE SUMMARY <br /> CLIENT: sHN Engineers <br /> CONTACT: R. Klassen Date Sampled: N/A <br /> COC No: 4353 Date Received: N/A <br /> Project No: Acampo 943007 Date Extracted: 3/10/94 <br /> Sample ID: N/A Date of Analysis: 3/12/94 <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 0.598 0. 462 0. 491 77% 82% 6% <br /> TOLUENE 0. 896 0. 729 0. 78 81% 87% 7% <br /> ETHYL BENZENE 0. 69 0. 532 0. 571 77% 83% 7% <br /> TOTAL XYLENES 1.764 1. 426 1. 474 81% 84% 3% <br /> LCS= LABORATORY CONTROL SPIKE <br /> LCSD= LABORATORY CONTROL SPIKE DUPLICATE <br /> RPD= RELATIVE PERCENT DIFFERENCE <br /> CONC= CONCENTRATION <br />