### Appendix 6 Detailed Risk Modeling ResultsSource CategoryFacility NEI IDFacility Name AddressCity StateFerroalloys 39167NEI11660 Eramet 16705 State Route 7 South Marietta OHFerroalloys 54053NEIWV053FELMAN NEW HAVEN PLANT US ROUTE 62 NORTH NEW HAVEN WVTable 1 - Facility Identification Information1 of 1Cancer MIR Cancer Incidence Noncancer Max HI Target Organ

54053NEIWV053FELMAN 6.28E-05 1.52E-03 1.49E+01 neurological 39167NEI11660 3.13E-05 8.75E-04 9.17E+01 neurological

54053NEIWV053FELMAN 4.62E-06 1.89E-04 8.29E-01 neurological 39167NEI11660 4.25E-06 2.29E-04 2.09E+00 neurological
1 BOLD indicates a cancer risk greater than 1 in a million or a noncancer risk greater than 1 Table 2 – Maximum Predicted HEM-3 Chronic Risks

Control Scenario Baseline scenario Facility NEI ID Source Category Chronic Risk 1

1 of 1REL AEGL1 AEGL2 ERPG1 ERPG2 54053NEIWV053FELMAN Nickel compounds 4.38E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 54053NEIWV053FELMAN Arsenic compounds 3.75E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 39167NEI11660 Arsenic compounds 3.91E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 54053NEIWV053FELMAN Mercury (elemental) 9.27E-01 0.00E+00 3.27E-04 0.00E+00 2.78E-04 39167NEI11660 Mercury (elemental) 9.09E-01 0.00E+00 3.21E-04 0.00E+00 2.73E-04 39167NEI11660 Formaldehyde 2.83E-01 1.42E-02 9.16E-04 1.42E-02 9.16E-04 54053NEIWV053FELMAN Hydrofluoric acid 2.62E-01 7.67E-02 3.14E-03 7.67E-02 3.14E-03 39167NEI11660 Nickel compounds 1.65E-01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 39167NEI11660 Hydrochloric acid 1.44E-01 1.12E-01 9.15E-03 1.12E-01 9.15E-03 54053NEIWV053FELMAN Formaldehyde 1.16E-01 5.80E-03 3.76E-04 5.80E-03 3.76E-04 39167NEI11660 Hydrofluoric acid 6.62E-02 1.94E-02 7.95E-04 1.94E-02 7.95E-04 54053NEIWV053FELMAN Hydrochloric acid 2.72E-02 2.12E-02 1.73E-03 2.12E-02 1.73E-03

REL A EGL1 A EGL2 ERPG1 ERPG2 54053NEIWV053FELMAN Mercury (elemental) 4.53E-01 0.00E+00 1.60E-04 0.00E+00 1.36E-04 54053NEIWV053FELMAN Nickel compounds 4.33E-01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 54053NEIWV053FELMAN Arsenic compounds 3.71E-01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 39167NEI11660 Arsenic compounds 2.30E-01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 39167NEI11660 Formaldehyde 1.69E-01 8.46E-03 5.47E-04 8.46E-03 5.47E-04 54053NEIWV053FELMAN Hydrofluoric acid 1.42E-01 4.15E-02 1.70E-03 4.15E-02 1.70E-03 39167NEI11660 Mercury (elemental) 1.19E-01 0.00E+00 4.19E-05 0.00E+00 3.56E-05 54053NEIWV053FELMAN Formaldehyde 6.28E-02 3.14E-03 2.03E-04 3.14E-03 2.03E-04 39167NEI11660 Nickel compounds 4.74E-02 0.00E+00 0.00E+00 0.00E+00 0.00E+00 39167NEI11660 Hydrochloric acid 4.57E-02 3.56E-02 2.91E-03 3.56E-02 2.91E-03 39167NEI11660 Hydrofluoric acid 3.16E-02 9.26E-03 3.80E-04 9.26E-03 3.80E-04 54053NEIWV053FELMAN Hydrochloric acid 1.47E-02 1.15E-02 9.37E-04 1.15E-02 9.37E-04

Note: BOLD indicates acute risks greater than 1

1 Some maximum acute impacts may be at onsite locations. Table 3 – Maximum Predicted Acute Risks (HEM-AERMOD)

Pollutant Ferroalloys

Maximum Hazard Quotient 1 Facility NEI ID Baseline Modeling Scenario

Post-Control Modeling Scenario
Facility NEI ID Pollutant Maximum Hazard Quotient 1

1 Some maximum acute impacts may be at onsite locations.

1 of 154053NEIWV053FELMAN Nickel compounds REL 44 10 54053NEIWV053FELMAN Arsenic compounds REL 37 9 39167NEI11660 Arsenic compounds REL 4 2 Table 4 – Maximum Predicted Acute Risks Greater than 1 (Refined Approach)

Refined Modeling Approach 2 Pollutant Criteria HEM-3 (Screening) Refined Results 1 Baseline Modeling Scenario

Examined results for maximum off-site impact Ferroalloys

2 See Appendix 7 for figures depicting off-site impacts. Facility NEI ID

1 Facilities with a HEM-3 screening acute value greater than 1 were refined.

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