Estimated Costs For Potential Fugitive Particulate Control Modifications at Eramet Marietta Inc. (as of 11/22/2013)

The costs estimates below represent the curren t estimates of the costs to implement and operate additional fugitive partic ulate controls at the Eramet Marietta Inc. facility. These estimates are necessarily general due to the fact that control strategies are conceptual and no detailed design work has been conducted. Altho ugh a 30% contingency has been incorporated in

the estimates due to the status of the design, no contingency to account for anticipated start-up

and shakedown costs has been included and EM I therefore believes the actual costs of implementing the described contro ls are likely to be higher.

Furnace 1 :

 Tapping Hood – Modify hood to increase capture efficiency, vented to existing tapping baghouse.

 Casting Hood – Install capture system (hood) for casting operations, vented to existing tapping baghouse.

 Roof Ventilation – Partition roof canopy (above crane rails) to contain fugitive emissions, vented through roof monitors to existing furnace baghouse via ducts.

1) Furnace 1: Tapping Fan Upgrade

a. Equipment/materials costs

i. Ductwork, ID Fan, Dampers, Actuators, Electric al $ 228,000

ii. Instrumentation 11,000

iii. Taxes 12,000

iv. Freight 13,000

b. Installation cost (inc. labor) 26,000

c. Engineering & design costs 53,000 Subtotal $ 343,000

2) Furnace 1: Casting Hood

a. Equipment/materials costs

i. Hood, Ductwork, Dampers, Actuators, Electrical $ 432,000

ii. Instrumentation 22,000

iii. Taxes 26,000

iv. Freight 22,000

b. Installation cost (inc. labor) 130,000‐ 2 ‐ c. Engineering & design costs 100,000 Subtotal $ 732,000

3) Furnace 1: Roof Ventilation

a. Equipment/materials costs

i. Ductwork, Hood, Dampers, Structural Steel, Electrical $ 1,093,000

ii. Instrumentation 109,000

iii. Taxes 66,000

iv. Freight 55,000

b. Installation cost (inc. labor) 1,335,000

c. Engineering & design costs 423,000 Subtotal $ 3,081,000

Furnace 1 Total Equipment, Installation, Engineering $ 4,156,000 1

Furnace 1 Retrofit Costs (Downtime) CBI 2

Furnace 1 Annualized Capital Cost Recovery 3 $ 392,297

Furnace 1 Annual O&M Costs $ 461,211

Furnace 1 Annualized Costs (Capital plus O&M) $ 853,508

1 Estimate does not include an a dditional contingency that would be appropriate to account for expected start-up and shakedown co sts associated with integration of new abatement equipment.

2 Downtime costs based on estimated lost sa les, which involves confidential business information (CBI). These costs are provided under separate cover and should be treated as CBI.

3 Calculated in 2012 dollars for 20-year useful li fe at 7% interest ra te in accordance with methodology provided in “Engineering Review of Proposed Ferroalloy NESHAP Requirements for Eramet Marietta Inc.” (ENVIRON Interna tional Corp. 2012), included as Appendix B to EMI’s January 31, 2012 comments on proposed NESH AP. The estimated annualized capital cost presented does not include any portion of estimated retrofit costs attributable to furnace

downtime.‐ 3 ‐ Furnace 12 :

 Tapping Hood – Modify hood to increase capture e fficiency, vented to existing scrubber.

 Roof Ventilation – Partition roof canopy (above crane rails) to contain fugitive emissions, vented through roof monitors to existing scrubber via ducts.

 Upgrades to existing scrubber OR insta llation of secondary dust collector

1) Furnace 12: Roof Ventilation/Tap System Capture

a. Equipment/materials costs

i. Ductwork, Hood, Dampers, Structural Steel, Electrical $ 1,385,000

ii. Scrubber Upgrades OR Dust Collector 7,318,000

iii. Instrumentation 261,000

iv. Taxes 522,000

v. Freight 435,000

b. Installation cost 4,956,000

c. Engineering & design costs 2,183,000

Furnace 12 Total Equipment, Installation, Engineering $ 17,060,000 4

Furnace 12 Retrofit Costs (Downtime) CBI 5

Furnace 12 Annualized Capital Cost Recovery 6 $ 1,474,377

Furnace 12 Annual O&M Costs $ 2,178,599

Furnace 12 Annualized Costs (Capital plus O&M) $ 3,652,975

4 Estimate does not include an a dditional contingency that would be appropriate to account for expected start-up and shakedown co sts associated with integration of new abatement equipment.

5 Downtime costs based on estimated lost sa les, which involves confidential business information (CBI). These costs are provided under separate cover and should be treated as CBI.

6 Calculated in 2012 dollars for 20-year useful li fe at 7% interest ra te in accordance with methodology provided in “Engineering Review of Proposed Ferroalloy NESHAP Requirements for Eramet Marietta Inc.” (ENVIRON Interna tional Corp. 2012), included as Appendix B to EMI’s January 31, 2012 comments on proposed NESH AP. The estimated annualized capital cost presented does not include any portion of estimated retrofit costs attributable to furnace

downtime.‐ 4 ‐ MOR :

 Casting Hood – Modify hood to increase captu re efficiency, vented to existing MOR baghouse.

 Roof Ventilation – Partition roof canopy (above crane rails) to contain fugitive emissions, vented through roof monitors to existing MOR baghouse via ducts.

1) MOR: Roof Ventilation/Casting Hood

a. Equipment/materials costs

i. Roof Modification/Repair $ 650,000

ii. Ductwork, Hood, Dampers, Structural Steel, Electrical 801,000

iii. Instrumentation 145,000

iv. Taxes 87,000

v. Freight 73,000

b. Installation cost (inc. labor) 1,613,000

c. Engineering & design costs 562,000

MOR Total Equipment, Inst allation, Engineering $ 3,931,000 7

MOR Retrofit Costs (Downtime) CBI 8

MOR Annualized Capital Cost Recovery 9 $ 371,059

MOR Annual O&M Costs $ 329,586

MOR Annualized Costs (Capita l plus O&M) $ 700,644

7 Estimate does not include an a dditional contingency that would be appropriate to account for expected start-up and shakedown co sts associated with integration of new abatement equipment.

8 Downtime costs based on estimated lost sa les, which involves confidential business information (CBI). These costs are provided under separate cover and should be treated as CBI.

9 Calculated in 2012 dollars for 20-year useful li fe at 7% interest ra te in accordance with methodology provided in “Engineering Review of Proposed Ferroalloy NESHAP Requirements for Eramet Marietta Inc.” (ENVIRON Interna tional Corp. 2012), included as Appendix B to EMI’s January 31, 2012 comments on proposed NESH AP. The estimated annualized capital cost presented does not include any portion of estimated retrofit costs attributable to furnace

downtime.