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t <br /> it <br /> CHEMTECH ANALYTICAL LABORATORIES <br /> ANALYSIS REPORT <br /> No:O. <br /> Date Samples Received: N/A P.O. <br /> 1972 <br /> Date of Analysis: 06/28/91 CT <br /> Sample ID: LCS, LCSD <br /> Lab ID,: N/A <br /> Matrix: WATER <br /> BTEX LABORATORY CONTROL SPIKE SUMMARY <br /> CONC CONC PERCENT <br /> COMPOUND SPIKED MEASURED RECOVERY RPD <br /> LCS LCSD LCS LCSD <br /> BENZENE 25 23 22 92% 88% 4% <br /> TOLUENE 25 23 23 92% 92% 0% <br /> ETHYL BENZENE 25 22 23 38% 92% 4% <br /> TOTAL XYLENES 75 67 68 89% 91% 1% <br /> LCS= LABORATORY CONTROL SPIKE <br /> LCSD- LABORATORY CONTROL SPIKE DUPLICATE <br /> RPD= RELATIVE PERCENT DIFFERENCE <br /> CONC= CONCENTRATION <br />