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Paragon Analytics METALS CASE NARRATIVE CEMEX, Inc. A and C Pit Order Number - 0607003 1. This report consists of 2 water samples. 2. The samples were received and intact on 07/01/06. The temperature of the samples upon receipt was 8° Celsius. 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 prepazed for analysis based on Methods for the Determination of Metals in Environmental Samples -Supplement 1 procedures. For analysis by ICP-MS, the samples were prepared following method 200.8 and PA SOP 806 Rev. 12. The samples were not digested prior to analysis. The samples were prepazed for ICP-MS analysis of selenium by passing 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. 4. The relationship between intensity and concentration for each element is established using at least four standards, one of which is a blank solution. A calibration equation relating instrument response to concentration is developed by the instrument software. The equation is a higher order polynomial. This type of equation is used to improve quantitation accuracy at lower concentrations where the relationship between concentration and instrument response is non-linear. During sample analysis concentrations are computed by the software 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 neaz the reporting limit, an Initial Calibration Verification (ICV)