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Privileged and Confidential—Attorney Client Communication Geosyntee° <br /> Consultants <br /> Table 6: Overview of Testing <br /> i vers ew $i j• `ves" Testing Ari'moa <br /> • Determine appropriate iron-based • Jar testing in lab <br /> Bench-Scale— coagulant setting using a 6-jar <br /> Coagulation/ <br /> Flocculation/ • Identify dosing range at different batch test apparatus <br /> Settling settling times as a proxy for surface <br /> overflow rates <br /> • Determine effect of potassium • Jar testing in lab <br /> Bench-Scale permanganate(KMnO4)and aeration on setting using a 6-jar <br /> Manganese manganese concentrations in water test apparatus <br /> Removal • Identify dosing range and effect of ferric <br /> chloride addition to KMnO4 and aeration <br /> steps <br /> • Evaluate effect of biochar,zeolite,and • Jar testing in lab <br /> Bench-Scale granular activated carbon(GAC)as a pre- setting using a shaker <br /> Adsorptive treatment or polishing step table and 1 L <br /> • Identify affinity of material for metals, Erlenmeyer flasks <br /> Media dissolved organic carbon(DOC),and <br /> chemical oxygen demand(COD) <br /> • Evaluate overall pilot-scale process for • Large containers with <br /> proof of concept(demonstrated ability to multiple cells to <br /> achieve CDPS metals discharge limits simulate MWP, <br /> under various feed water and flow bioreactor,and <br /> conditions) wetlands <br /> Pilot-Scale <br /> • Evaluate substrate mixture for bioreactor • Dosing of iron-based <br /> Assess time to achieve metals reduction <br /> • coagulant and caustic <br /> targets using the pre- <br /> • Determine the impact of various flow fabricated coagulation/ <br /> rates through the bioreactor flocculation/settling <br /> • Assess coagulant dose,pH impact,and MRI unit <br /> sulfuric acid dosage on the pilot-scale <br /> 2.2 Bench-Scale Testing <br /> There were three sets of bench-scale jar tests completed for this treatability study. They <br /> evaluated coagulation, flocculation, and settling on metals removal, manganese removal <br /> using permanganate and aeration, and removal of metals and DOC using adsorptive <br /> media. All jar testing was performed at CSM under the supervision of Dr. Linda <br /> Figueroa with help from one of her students and a Geosyntec staff member. <br /> treatabilitc 1 e,tine Report 9 December 11,2018 <br />