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i <br /> MATRIX ENVIRONMENTAL LABORATORIES <br /> ' ANALYSIS BTEX SPIKE SUMMARY <br /> CLIENT: Helmick & Lerner, Inc. <br /> CONTACT: D. Nakamoto Date Sampled: N/A <br /> COC No: 4424 Date Received: N/A <br /> ' Pro]ect No: 10101 Tracy Date Extracted: 5/6/94 <br /> Sample ID: N/A Date of Analysis: 5/6/94 <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 . 588 0 . 622 0 . 628 1060 107% 1% <br /> TOLUENE 0 . 896 0 .940 0. 947 105%, 106% 1% <br /> ETHYL BENZENE 0 . 690 0 .706 0 . 714 1020 103% 1% <br /> ' TOTAL XYLENES 1. 76 1.81 1. 83 102% 104 1� <br /> 'i LCS= LABORATORY CONTROL SPIKE <br /> LCSD= LABORATORY CONTROL SPIKE DUPLICATE <br /> ' RPD= RELATIVE PERCENT DIFFERENCE <br /> CONC= CONCENTRATION <br /> 1 <br /> 1 <br /> r <br />