**Tilden Taconite Indurating Line #1 Venturi rod scrubber**  **Giv en/A**  **ssumed** Uncontrolled SO2 emissions (TPY) 1,153.20 Tilden 9/11/2009 Absorber + auxiliary equipment 2,120,661 $ Tilden 9/11/2009 Purchased Equipment cost Sales taxes 6.0% Tilden 9/11/2009 Retrofit factor 1.0 assumed Barr estimates 1.6 SO2 Control efficiency 50% Tilden 9/11/2009 Operating Hours per Year 7,680 Tilden 9/11/2009 Operating Hours per Shift 8 assumed Operating Shifts per Year 960 calculated Utilization 100% Tilden 9/11/2009 Operating Labor Cost ($/hr) 85.00 $ Tilden 9/11/2009 Maintenance Labor Cost ($/hr) 85.00 $ Tilden 9/11/2009 Chemical cost ($/ton) 90.80 $ Tilden 9/11/2009 Chemical usage (lb/hr) 263 calculated from Tilden 9/11/2009 varies directly with assumed control efficiency Solvent usage (gpm) 912 calculated from Tilden 9/11/2009 varies directly with assumed control efficiency Solvent cost ($/kgal) 0.40 $ Tilden 9/11/2009 Wastewater disposal ($/kgal) 3.80 $ OAQPS Control Cost Manual example Tilden estimates $100/kgal for reverse osmosis. Wastewater generation (gpm) 739 calculated from Tilden 9/11/2009 varies directly with assumed control efficiency Electrical Cost ($/kW h) 0.05 $ Tilden 9/11/2009 Electrical Use (kW/hr) 1,999 Tilden 9/11/2009 Inflation Since 2009 1.06 CEPCI 2010/CEPCI 2009 Equipment Life (yr) 20 Tilden 9/11/2009 Interest Rate (%) 7.00% Tilden 9/11/2009**Tilden Taconite Indurating Line #1**

**Capital Cost factors for Gas A bsorbers--OA** **QPS Control Cost Manual, Chap 5**

Cost Item Factor Cost Direct Costs Purchased equipment costs Absorber + auxiliary

equipment, EC A $2,238,092 Instrumentation 0.10 A $223,809 Sales taxes 0.060 A $134,286 Freight 0.05 A $111,905 Purchased equipment cost, PEC B= 0.21 A $2,708,091

Direct installation costs Foundations & supports 0.12 B $324,971 Handling & erection 0.40 B $1,083,236 Electrical 0.01 B $27,081 Piping 0.30 B $812,427 Insulation 0.01 B $27,081 Painting 0.01 B $27,081 Direct installation costs x 1 x 0.85 B $2,301,877

Site preparation As required, SP Buildings As required, Bldg.

Total Direct Costs, DC 1.85 B+SP+Bldg $5,009,968

Indirect Costs (installation) Engineering 0.10 B $270,809 Construction and field expenses 0.10 B $270,809 Contractor fees 0.10 B $270,809 Start-up 0.01 B $27,081 Performance test 0.01 B $27,081 Contingencies 0.03 B $81,243

Total Indirect Costs, IC 0.35 B $947,832

Total Capital Investment = DC + IC 2.20 B+SP+Bldg $5,957,800

### Tilden Taconite Indurating Line #1

**Annual Cost factors for Gas Absorbers--OAQPS Control Cost Manual, Table 1.4**

Cost Item Factor Cost Direct Annual Costs, DC Operating labor Operator 0.5 hr/shift $40,800 Superv isor 15% of operator $6,120 Operating materials Solvent 912 gpm * 0.40 $ /kgal = $175,104 Chemicals 263 lb/hr * 90.80 $ /ton = $91,701 Wastewater Disposal 739 gal/min * 60 min/hr * 7,680 hr/yr * 3.80 $ /kgal = $1,294,019 Maintenance Labor 0.5 hr/shift $40,800 Material 100.00% of maintenance $40,800 Electricity All electricity equal to:

0.05 $ $/kwh, * 1,999 kW -hr * 7,680 hr/yr = $798,321

Total DC $2,487,664

Indirect Annual Costs, IC Overhead 60% of total labor and material costs $77,112 Administrative charges 2% of Total Capital Investment $119,156 Property tax 1% of Total Capital Investment $59,578 Insurance 1% of Total Capital Investment $59,578 Capital recovery 0.0944 * Total Capital Investment $562,374

Total IC $877,798

Total Annual Cost DC + IC $3,365,462

### Tilden Taconite Indurating Line #1 SO2 Uncontrolled emissions (TPY) 1,153.2 Control efficiency

(%) 50% Em ission reduction (TPY) 577 Controlled emissions (TPY) 577 Total annualized cost ($/yr) $3,365,462 Cost/ton removed ($/T) $5,837