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DocuSign Envelope ID: EBE28081 -B782-4B42-BADB-D8C93B687B1 B <br />TOXICITY REDUCTION EVALUATION — LINES OF INVESTIGATION <br />Cost Evaluation <br />from these borings can also be analyzed and tested for iron composition to determine the amount of <br />imported iron reduction that is possible. <br />3.4 OPERATIONAL COSTS <br />Operational costs are developed based on labor, reagents, electrical power, periodic testing, waste <br />haulage and maintenance. It is assumed that the labor can include part time operators from existing site <br />staff; these are represented by fractional or zero labor quantities. Electrical power is estimated by <br />preliminary equipment sizing as well as a lighting and heating allowances and is calculated at a utility rate <br />of $0.064/kW-hr. Reagent costs are based on recent quotes and published supplier costs. Reagent <br />storage volumes assume 60 days of storage at peak use and is expected to span 90 days over the low - <br />flow season in winter. <br />Costs for the two treatment options are presented in Table 3. NF Membrane Separation Operational <br />Cost Estimate and Table 4. BSR Bioreactor Treatment Operational Cost Estimate. <br />Table 3. NF Membrane Separation Operational Cost Estimate <br />Labor Costs <br />Role <br />Quantity <br />Contractor Rate <br />Annual Cost <br />Senior Engineer <br />0 <br />$120 <br />Existing <br />Senior Operator <br />1 <br />$95 <br />$197,600 <br />Operator <br />1 <br />$70 <br />$145,600 <br />Waste Haulage <br />0 <br />$80 <br />Existing <br />Mechanics <br />0.5 <br />$80 <br />$83,200 <br />Electricians <br />0.25 <br />$80 <br />$41,600 <br />Environmental <br />0 <br />$85 <br />Existing <br />Evaporation Pond Management <br />2 <br />$45 <br />$187,200 <br />Administrative Staff <br />Existing <br />Subtotal Labor <br />$655,200 <br />Power and Miscellaneous Costs <br />Description <br />Rate <br />Value <br />Daily <br />Annual Cost <br />Power <br />$0.06 <br />10,782 <br />kW-hr/day <br />$690.05 <br />$251,868 <br />Reagents <br />Sodium Hydroxide <br />$0.68 <br />420 <br />lb/day <br />$285.40 <br />$104,169 <br />Sulfuric Acid <br />$0.22 <br />1,501 <br />lb/day <br />$1,447.58 <br />$117,807 <br />Propane <br />$3.99 <br />8.7gal/day <br />$34.76 <br />$12,689 <br />Reagents (CIP Quarterly) <br />Sodium Bisulfite <br />$0.31 <br />300 <br />Wyear (3% wt soln) <br />$93 <br />Calcium Hypochlorite <br />$0.46 <br />300 <br />Wyear (3%wt soln) <br />$138 <br />Citric Acid <br />$0.36 <br />300 <br />Wyear (3%wt soln) <br />$108 <br />Monthly Water Testing <br />$6,000 <br />Waste Haulage <br />$40.00 <br />5 <br />tons/day $204.42 <br />$74,613 <br />Maintenance (3%) <br />$161,336 <br />Subtotal Power and Miscellaneous <br />$728,821 <br />Annual Total <br />$1,384,021 <br />dpg \\us0321-ppfss011shared_projectsV33001407\reports\4_tre lines of investigationitre lines of investigation_20200320_ifra.docx 3.15 <br />