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Privileged and Confidential—Attorney Client Communication Geosyntec D <br /> consultants <br /> Acronyms and Abbreviations <br /> ACZ ACZ Laboratories <br /> ASTM American Society for Testing and Materials <br /> CDPHE Colorado Department of Public Health and Environment <br /> CDPS Colorado Discharge Permit System <br /> COD chemical oxygen demand <br /> CSM Colorado School of Mines <br /> DI deionized <br /> DO dissolved oxygen <br /> DOC dissolved organic carbon <br /> GAC granular activated carbon <br /> gpm gallons per minute <br /> IC25 effluent concentration which causes 25%_reduction in growth or <br /> reproduction of test organisms <br /> ICP-MS inductively couple plasma mass spectrometry <br /> IWC instream waste concentration <br /> MGD millions of gallons per day <br /> Mine Revenue Silver Mine <br /> MWP Mine Water Pond <br /> ND non-detect <br /> NOEC no observed effect concentration <br /> ORP oxidation-reduction potential <br /> OSMI Ouray Silver Mines Inc. <br /> QC quality control <br /> Report Treatability Testing Report <br /> rpm revolutions per minute <br /> SEM-EDX scanning electron microscopy with energy dispersive X-ray <br /> spectroscopy <br /> SRB sulfate reducing bioreactor <br /> TDS total dissolved solids <br /> Treatability Testing Report Y December 11,2018 <br />