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Paragon Analytics <br />METALS CASE NARRATIVE <br />CEMEX, Inc. <br />Order Number - 0601125 <br />1. This report consists of 1 water sample. <br />2. The sample was received cool and intact on 01/20106. <br />3. The sample was to be analyzed for dissolved metals. The sample had not been <br />filtered and preserved prior to receipt. The sample was filtered through a 0.45 <br />micron filter and preserved with nitric acid to a pH less than two prior to analysis. <br />4. The sample was prepared for analysis based on Methods for the Determination of <br />Metals in Environmental Samples -Supplement 1 procedures. <br />For analysis by ICP-MS, the sample was prepared following method 200.8 and PA <br />SOP 806 Rev. 12. The sample was not digested prior to analysis. <br />The sample was prepazed for ICP-MS analysis of selenium bypassing the sample <br />and associated QC through a cation exchange column. The cation exchange <br />column removes cations from the matrix. <br />5. The sample was analyzed following Methods for the Determination of Metals in <br />Environmental Samples -Supplement 1 procedures. <br />Analysis by ICP-MS followed method 200.8 and PA SOP 827 Rev. 4. <br />The relationship between intensity and concentration for each element is <br />established using at least four standards, one of which is a blank solution. A <br />calibration equation relating instrument response to concentration is developed <br />by the instrument softwaze. The equation is a higher order polynomial. This <br />type of equation is used to improve quantitation accuracy at lower <br />concentrations where the relationship between concentration and instrument <br />response is non-linear. <br />During sample analysis concentrations are computed by the softwaze and the <br />results aze printed in ugly. The validity of the calibration equation is tested by <br />analyzing the following solutions: a blank, a low level check solution with <br />concentrations near the reporting limit, an Initial Calibration Verification (ICV) <br />standard from a 2nd source standard solution with concentrations near the <br />middle of the analytical range, a Continuing Calibration Verification (CCV) <br />standard with concentrations near the middle of the analytical range but <br />