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Paragon Analytics METALS CASE NARRATIVE CEMEX, Inc. A + C Pits Order Number - 0504065 1. This report consists of 2 water samples. 2. The samples were received cool and intact on 04/07/05. 3. The samples were to be analyzed for dissolved metals. The samples had not been filtered and preserved prior to receipt. The samples were filtered through a 0.45 micron filter and preserved with nitric acid to a pH less than two prior to analysis. 4. The samples were prepared for analysis based on Methods for the Determination ofMetaLs in Environmental Samples -Supplement 1 procedures. For analysis by ICP-MS, the samples were prepared following method 200.8 and PA SOP 806 Rev. 10. The samples were not digested prior to analysis. The samples were prepared for ICP-MS analysis of selenium bypassing the samples and associated QC through a cation exchange column. The cation exchange column removes cations from the matrix. 5. The samples were analyzed following Methods for the Determination of Metals in Environmental Samples -Supplement 1 procedures. Analysis by ICP-MS followed method 200.8 and PA SOP 827 Rev. 3. The relationship between intensity and concentration for each element is established using at least four standards, one of which is a blank solution. A linear regression is performed by the instrument softwaze to develop the calibration equation. During sample analysis concentrations are computed by the softwaze and the results are printed in ug/L,. The validity of the calibration equation is tested by analyzing the following solutions: a blank, a low level check solution with concentrations near the reporting limit, an Initial Calibration Verification (ICV) standard from a 2"d source standard solution with concentrations near the middle of the analytical range, a Continuing Calibration Verification (CCV) standard with concentrations near the middle of the analytical Yange but