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Paragon Analytics <br />INORGANICS CASE NARRATIVE <br />CEMEX, Inc. <br />Order Number - 0512136 <br />1. This report consists of 1 water sample. <br />2. The sample was received cool and intact on 12/15/05. <br />3. The sample was prepared for analysis based on Methods for the Chemical <br />Analysis of Waters and Wastes (MCAWW), May 1994 procedures. <br />4. The samples were analyzed following MCAWW procedures for the following <br />method: <br />Analvte Method SOP # <br />pH 150.1 1126 Rev 15 <br />5. All standards and solutions were used within their recommended shelf life. <br />6. The samples were prepared and analyzed within the established hold time for this <br />analysis. <br />All in house quality control procedures were followed, as described below. <br />7. General quality control procedures. <br />All initial arid continuing calibration verifications (ICV/CCV) associated with <br />this analytical batch were within the acceptance criteria for the requested <br />analyte. This indicates a valid calibration and stable instrument conditions. <br />8. Matrix specific quality control procedures. <br />Sample 0512136-1 was designated as the quality control sample for this analysis. <br />^ A sample duplicate was prepared and analyzed with this batch. All guidance <br />criteria for precision were met. <br />