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Paragon Analytics <br />INORGANICS CASE NARRATIVE <br />CEMEX, Inc. <br />Order Number - 0409105 <br />1. This report consists of 2 water samples. <br />2. The samples were received cool and intact on 07/14/04. <br />3. The samples had been correctly preserved for the requested analyses. <br />4. The samples were prepared for analysis based on Methods for the Chemical <br />Analysis of Waters and Wastes (MCAWW), May 1994 procedures. <br />5. The samples were analyzed following MCAWW procedures for the following <br />methods: <br />Anal e Method SOP # <br />pH 150.1 1126 Rev 14 <br />Specific conductance 120.1 1128 Rev 7 <br />6. All standards and solutions were used within their recommended shelf life. <br />7. The samples were prepared and analyzed within the established hold time for each <br />analysis. <br />All in house quality control procedures were followed, as described below. <br />8. General quality control procedures. <br />All initial and continuing calibration verifications (ICV/CCV) associated with <br />each analytical batch were within the acceptance criteria for the requested <br />analytes. This indicates a valid calibration and stable instrument conditions. <br />9. Matrix specific quality control procedures. <br />Sample 0409]05-3 was designated as the quality control sample for each analysis. <br />Similarity of matrix and therefore relevance of the QC results should not be <br />automatically inferred for any sample other than the native sample selected for <br />QC. <br />^ A sample duplicate was prepared and analyzed with each batch. All guidance <br />criteria for precision were met. <br />10. Sample dilutions were not required for the requested analyses. <br />