Table 1 - Risk assessment results 

Maximum individual 

cancer risk (in a 

million) 

Maximum chronic noncancer TOSHI 

MACT Source Category Number of Facilities Modeled Actual Emissions 

Level 

Allowable 

Emissions 

Level 

Population 

at risk ≥ 1-

in-1 million 

Annual 

cancer 

incidence Actual Emissions 

Level 

Allowable 

Emissions 

Level 

Hard Chromium 

Electroplating 

63 + 1,219 

model plant 70 90 14,200,000 0.8 0.06 0.09 

Decorative 

Chromium 

Electroplating 

96 + 337 

model plant 70 70 390,000 0.08 0.06 0.06 

Chromium Electroplating 

Chromium 

Anodizing 

7 + 73 model 

plant 5 5 2,700 0.003 0.004 0.004 

Epichlorohydrin 

Elastomers 1 10 10 800 0.0001 0.1 0.1 

Polybutadiene 

Rubber 5 30 30 24,000 0.003 0.3 0.3 

Styrene 

Butadiene 

Rubber and 

Latex 

Production 

6 10 10 25,000 0.004 0.2 0.2 

Polymers and Resins I 

Nitrile 

Butadiene 

Rubber 

Production 

1 2 2 70 0.0004 0.009 0.009 

152 20 30 71,000 0.01 0.3 0.5 

Marine Tank Vessel Loading 

Operations 

300 

(extrapolation 

to total 

population) 

20 30 140,000 0.02 0.3 0.5 

Pharmaceuticals Production 27 3 4 2,000 0.0008 0.2 0.3 
Printing and Publishing Industry 172 4 20 300 0.0006 0.08 0.4 

51 NA NA 30(HI>1) NA 2 2 

Steel Pickling – HCl Process 

Facilities and Hydrochloric Acid 

Regeneration Plants 

80 

(extrapolation 

to total 

population) 

NA NA NA NA 2 2 

Table 2 – Facility-wide risk assessment results 

MACT Source Category 

Facility-Wide MIR 

(in 1 million) 

Source category 

contribution to MIR1

Facility-Wide 

TOSHI 

cont

Hard Chromium 

Electroplating 90 <1% 2 

Decorative Chromium 

Electroplating 90 7% 0.8 

Chromium 

Electroplating 

Chromium Anodizing 20 25% 0.2 

Epichlorohydrin Elastomer 

Production 10 100% 0.5 

Polybutadiene Rubber 

Production 30 100% 0.3 

Styrene Butadiene Rubber and 

Latex Production 70 5% 1 

Polymers and 

Resins I 

Nitrile Butadiene Rubber 

Production 5 33% 0.03 

Marine Tank Vessel Loading Operations 200 10% 4 

Pharmaceuticals Production 40 <1% 0.8 

Printing and Publishing Industry 20 <1% 2 

Steel Pickling 100 NA 10 
Table 3 - Demographic analysis results (populations within 5 km of facilities) 

Percentage of Population Group With Risk Greater Than 1

MACT Source category Emissions Basis MIR (in 1 million) Total Population at 1- in-a million risk All Ethnic Minority African American Other and Multiracial Hispanic or Latino Native American 

Nationwide NA 285,000,000 25 12 12 14 0.9 

Source 

Category Hard 70 13,100,00 52 23 29 34 0.6 

Chromium 

Electroplating Facility- wide 90 13,100,000 52 23 29 34 0.6 

Source 

Category Decorative 70 356,000 50 18 32 47 0.8 

chromium 

Electroplating Facility- wide 90 434,000 54 21 32 48 0.7 

Source 

Category 5 2,700 36 16 20 27 0.4 

Chromium 

Electroplating 

Chromium 

Anodizing Facilitywide 20 7,960 23 10 12 13 1 

Source 

Category 10 780 54 53 0.8 0.8 0.4 

Epichlorohydrin 

Elastomers Facilitywide 10 920 52 51 0.6 0.6 0.5 

Source 

Category 30 16,800 11 6 4 4 0.5 

Polybutadiene 

Rubber Facilitywide 30 19,900 12 7 5 4 0.5 

Source 

Category Styrene 10 23,700 40 3 36 54 0.6 

Butadiene 

Rubber Facility- wide 70 105,400 50 29 20 32 0.5 

Source 

Category 2 70 94 94 0 0 0 

Polymers and 

Resins I 

Nitrile 

Butadiene 

Rubber Facility- wide 5 6,200 95 93 2 0.4 0.1 

Source 

Category 20 64,600 29 7 21 38 0.6 

Marine Tank Vessel Loading 

Operations Facilitywide 200 815,000 38 18 19 34 0.5 

Source 

Category 3 2,000 12 4 8 34 0.5 

Pharmaceuticals Production Facilitywide 40 28,000 18 14 4 12 0.3 

Printing and Publishing Industry Source Category 4 50 0 0 0 0 0 
Facilitywide 20 53,800 14 8 5 5 0.3 

Source 

Category 2(HI) 45 0 0 0 9 0 

Steel Pickling Facilitywide 10(HI) 1,700 41 34 6 1 0.2 

Table 4 - Control alternative assessment 

MACT 

Source 

Category Control Option 

Number of 

Affected 

Facilities 

HAP 

Emission 

reduction 

(TPY) 

Capital 

costs 

($million) 

Annualized 

costs 

($million/yr) 

eff

($m

Large hard House Keeping 132 -- -- -- 

chromium 

electroplating HEPA filter retrofit 132 1 35.1 18.4 

House Keeping 658 -- -- -- 

HEPA filter retrofit 658 0.4 66 33.9 

Small hard 

chromium 

electroplating CMP retrofit 392 0.2 36.6 11.1 

House Keeping 740 -- -- -- 

HEPA filter retrofit 740 0.1 109 50.6 

Decorative 

chromium 

electroplating CMP retrofit 644 0.051 41.3 22.2 

House Keeping -- -- -- -- 

HEPA filter retrofit 240 0.02 43.9 18.9 

Chromium 

Electroplating 

Chromium 

anodizing CMP retrofit 198 0.0091 16.1 7.4 

MACT floor - 

current emissions 

level 

1 0 0 0 

Epichlorohydrin 

Elastomer 

Production 

Beyond the floor - 

back-end control 

device with 98% 

reduction 

1 35 0.6 1.1 

Polymers and 

Resins I 

Polybutadiene 

Rubber none proposed -- -- -- -- 
Styrene 

Butadiene 

Rubber 

none proposed -- -- -- -- 

MACT floor - 

current emissions 1 0 0 0 

Nitrile 

Butadiene 

Rubber 

Beyond the floor - 

back-end control 

device with 98% 

reduction 

1 1.7 1.6 11.4 

MACT floor - 

current emissions 1 0 0 0 

Neoprene 

Rubber 

Beyond the floor - 

back-end control 

device with 98% 

reduction 

1 22.5 1.3 4.8 

MACT floor - 

current emissions Ethylene 1 0 0 0 

Propylene 

Rubber Beyond the floor - front-end incinerator 1 19.6 1.1 0.6 

MACT floor - frontend current 

emissions 

1 0 0 0 

Beyond the floor - 

front-end incinerator 1 30 0.6 0.2 

MACT floor - backend current 

emissions 

1 0 0 0 

Butyl Rubber 

Beyond the floor - 

back-end control 

device with 98% 

reduction 

1 26 0.2 0.2 

MACT floor - frontend current 

emissions 

1 0 0 0 

Halobutyl Rubber 

Beyond the floor - 

front-end incinerator 1 76 1.1 0.6 
MACT floor - backend current 

emissions 

1 0 0 0 

Beyond the floor - 

back-end control 

device with 98% 

reduction 

1 41 1 1.6 

Gasoline loading 

threshold 5 million 

bbl/yr 

0 0 0 0 

Gasoline loading 

threshold 1 million 

bbl/yr 

54 190 22 14 

Marine Tank 

Vessel 

Loading 

Operations 

Subcategories 

(1) facilities 

emitting under 

10/25 TPY of 

HAP 

(2) facilities 

located more 

than 0.5 miles 

from shore 

Gasoline loading 

threshold 0.5 million 

bbl/yr 

88 240 36 20 

Pharmaceuticals Production none proposed -- -- -- -- 

Printing and Publishing Industry none proposed -- -- -- -- 

Steel Pickling none proposed -- -- -- -- 

*Information not available - MIR after controls not estimated