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Privileged and Confidential—Attorney Client Communication Geosyntec° <br /> consultall is <br /> Table 7: Coagulation/Flocculation/Sedimentation Jar Testing Summary <br /> # ; ar �r, . err ar "`. ;r ,,, <br /> 1 • Source • Source • Source • Source • Source • Source <br /> Water 1 Water 1 Water 1 Water 2 Water 2 Water 2 <br /> • Dose: 5 • Dose: • Dose: • Dose: 5 • Dose: • Dose: <br /> •• <br /> mg/L 15 mg/L 30 mg/L mg/L 15 mg/L 30 mg/L <br /> • pH: 7-8 • pH: 7-8 • pH: 7-8 • pH: 7-8 • pH: 7-8 • pH: 7-8 <br /> 2 • Source • Source • Source • Source • Source • Source <br /> Water 2 Water 2 Water 2 Water 2 Water 2 Water 2 <br /> • Dose: • Dose: • Dose: • Dose: • Dose: • Dose: <br /> 10 mg/L 10 mg/L 15 mg/L 15 mg/L 20 mg/L 20 mg/L <br /> • pH: 7-8 • pH: 9- • pH: 7-8 • pH: 9- • pH: 7-8 • pH: 9- <br /> 10 10 10 <br /> 3 • Source • Source • Source • Source • Source • Source <br /> Water 1 Water 1 Water 1 Water 1 Water 1 Water 1 <br /> • Dose: 5 • Dose: • Dose: • Dose: 5 • Dose: • Dose: <br /> mg/L 15 mg/L 30 mg/L mg/L 15 mg/L 30 mg/L <br /> • pH: 7-8 • pH: 7-8 • pH: 7-8 pH: 9- • pH: 9- • pH: 9- <br /> 10 10 10 <br /> The steps performed for each jar test are listed below. <br /> • Add 2 L of source water to each jar <br /> • Add coagulant using the 107.4 mmol iron stock solution already prepared <br /> • Mix at 300 revolutions per minute(rpm) for 20 seconds <br /> • Begin the pH adjustment using the 1 M potassium hydroxide(KOH)solution <br /> previously prepared while mixing at 30 rpm <br /> • After the pH adjustment has been completed, continue mixing at 30 rpm for an <br /> additional 10 minutes <br /> • Stop the mixing in the jars and take initial turbidity measurements <br /> • Let the jars settle for 1 hour, collecting turbidity at 15-minute intervals <br /> • After one hour, collect total metals, dissolved metals, TSS, and IDS from each <br /> of the six jars <br /> 2.23 Bench-Scale Manganese Removal <br /> The next phase of jar testing evaluated manganese removal using aeration or potassium <br /> permanganate and will be used to support the design of the full-scale system in the <br /> event manganese becomes an issue. One jar test was completed during this phase using <br /> Treatability Testing Report 11 December 11,2018 <br />