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Privileged and Confidential—Attorney Client Communication Geosyntec p <br /> Consultants <br /> TABLE OF CONTENTS <br /> 1. INTRODUCTION 1 <br /> 1.1 Overview 1 <br /> 1.2 Mine Background 1 <br /> 1.3 Treated Water Discharge Limits 4 <br /> 1.4 Treatability Testing Report 5 <br /> 2. TREATMENT SYSTEM OVERVIEW AND TREATABILITY TESTING <br /> METHODS 6 <br /> 2.1 Overview 6 <br /> 2.2 Bench-Scale Testing 9 <br /> 2.2.1 Bench-Scale Source Water 10 <br /> 2.2.2 Bench-Scale Coagulation/Flocculation/Settling 10 <br /> 2.2.3 Bench-Scale Manganese Removal 11 <br /> 2.2.4 Bench-Scale Adsorptive Media 12 <br /> 2.3 Pilot-Scale Testing 14 <br /> 2.3.1 Initial Pilot Testing Scope 17 <br /> 2.3.2 Pilot Testing Source Water 18 <br /> 2.3.3 Pilot-Scale MRI Unit Testing 19 <br /> 2.3.4 Pilot-Scale Challenge Conditions Testing 22 <br /> 3. TREATABILITY TESTING RESULTS 24 <br /> 3.1 Bench-scale Tests 24 <br /> 3.1.1 Coagulation/Flocculation/Settling 24 <br /> 3.1.2 Manganese Removal 24 <br /> 3.1.3 Adsorptive Media 25 <br /> 3.2 Pilot-Scale Tests 26 <br /> 3.2.1 Pilot System Field Parameter Results 27 <br /> 3.2.2 Pilot System Anions,TSS, and DOC Results 28 <br /> 3.2.3 Pilot System Total and Dissolved Metals Results 29 <br /> 3.2.4 Formation of Biopolymer in Pilot System 29 <br /> 3.2.5 Challenge Conditions Testing 30 <br /> 3.2.6 MRI Unit Pilot System Testing Results 32 <br /> •1 reatabilitc 1 estinr Report v II December 11,2018 <br />