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Additional comments were not required for this SDG. <br /> Total Hardness by Calculation is determined using the results of Total Calcium (Ca) and <br /> Total Magnesium (Mg) determined by ICP or ICP-MS. <br /> Hardness= 2.497 (Ca) + 4.118 (Mg) <br /> Please refer to the Total Ca and Total Mg data to validate results appearing on the <br /> Hardness Summary sheet. Both results are in the Inorganic/metals section of the package. <br /> There is no Batch QC for calculated results, and thus no QC Summary for the Hardness <br /> by Calculation Batch. The MDLs and PQLs are calculated using the higher of the two <br /> calculated values of Ca or Mg. <br /> Certification Statement <br /> Where the analytical method has been performed under NELAP certification, the analysis <br /> has met all of the requirements of the NELAC standard unless otherwise noted in the <br /> analytical case narrative. <br /> Review Validation: <br /> GEL requires all analytical data to be verified by a qualified data validator. In addition, <br /> all data designated for CLP or CLP-like packaging will receive a third level validation <br /> upon completion of the data package. <br /> The following data validator verified the information presented in this case <br /> narrative: <br /> Reviewer: �� Date: <br /> Page 23 of 86 <br />