Appendix D: Summary of Statistical, Fuel, and Measurement Detection Level Variability for Existing Sources

Statistical 

Variability

Measurement Detection 

Level Variability

March 21st Final 

Rule Floor 

UPL

99% Confidence 

Level 3x RDL

Max Ratio (all data 

outliers removed, 

fuel-specific)

99% Combined 

Variance * Max Ratio 

(all data outliers 

removed, fuelspecific)

Solid Fuel 4.6E-06 Log-normal 3.1E-06 3.04E-06 8.60E-07 3.95 1.20E-05

Liquid 3.5E-06 Log-normal 2.6E-05 2.49E-05 4.64E-07 1.04 2.59E-05

Process Gas 1.3E-05 Tie 7.9E-06 7.85E-06 4.35E-07

Solid Fuel 3.5E-02 Log-normal 2.2E-02 2.13E-02 1.91E-04 3.66 7.81E-02

Liquid

All Liquids w/Fuel Analysis 3.3E-04 Tie 1.2E-03 4.89E-04 1.38E-04 2.46 1.20E-03

Process Gas 1.7E-03 Tie 1.7E-03 1.67E-03 6.30E-05

Biomass

Dutch Oven/

Pile Burner N/A Log-normal 2.4E-04 2.31E-04 1.27E-05

FB N/A Log-normal 1.2E-03 1.19E-03 5.21E-05

Fuel Cell N/A Tie 4.9E-05 1.83E-01 7.82E-05

Suspension Burner N/A Tie 1.1E-03 1.04E-03 1.58E-05

Suspension/Grate N/A Tie 4.9E-04 4.75E-04 4.82E-04

Wet Biomass Stoker N/A Tie 5.7E-05 5.62E-05 3.70E-05

Dry Biomass Stoker N/A Tie 4.0E-03 3.97E-03 N/A

Coal

FB N/A Tie 1.7E-05 1.19E-05 1.42E-05 1.14 1.62E-05

PC N/A Tie 5.9E-05 5.85E-05 4.86E-05

Stoker/Other N/A Log-normal 8.3E-05 8.21E-05 4.80E-05

Heavy Liquid N/A Tie 2.5E-04 2.19E-04 3.01E-06 1.13 2.48E-04

Light Liquid N/A Normal 4.1E-04 1.59E-04 4.02E-04

Non-Continental N/A Tie 6.2E-04 4.08E-04 3.29E-05 1.50 6.12E-04

Process Gas N/A Tie 2.4E-04 2.33E-04 1.11E-04

Biomass

Dutch Oven/

Pile Burner 3.9E-02 Tie 3.60E-02 3.58E-02 1.51E-03

FB 3.9E-02 Log-normal 1.1E-01 1.04E-01 1.32E-03

Fuel Cell 3.9E-02 Log-normal 3.30E-02 3.28E-02 2.43E-03

Suspension Burner 3.9E-02 Log-normal 5.1E-02 5.06E-02 3.18E-03

Suspension/Grate 3.9E-02 Log-normal 4.4E-01 4.37E-01 2.86E-03

Wet Biomass Stoker 3.9E-02 Log-normal 2.9E-02 2.84E-02 1.38E-03

Dry Biomass Stoker 3.9E-02 Tie 3.2E-01 3.19E-01 1.39E-03

Coal

FB 3.9E-02 Log-normal 8.8E-02 8.78E-02 2.48E-03

PC 3.9E-02 Log-normal 4.4E-02 4.33E-02 1.38E-03

Stoker/Other 3.9E-02 Log-normal 2.8E-02 2.79E-02 1.42E-03

Heavy Liquid 7.5E-03 Tie 6.2E-02 6.15E-02 7.07E-04

Light Liquid 7.5E-03 Log-normal 3.4E-03 3.34E-03 8.96E-04

Non-Continental 7.5E-03 Tie 8.0E-03 7.93E-03 1.19E-03

Process Gas 4.3E-02 Tie 6.7E-03 6.67E-03 5.25E-04

Biomass

Dutch Oven/

Pile Burner

N/A - switched 

subcategorization Log-normal 810 804

FB 430 Log-normal 370 364

Fuel Cell 690 Tie 1500 1,468

Suspension Burner N/A - switched 

subcategorization Tie 58 58

Suspension/Grate 3500 Log-normal 3900 3,857

Wet Biomass Stoker 490 Log-normal 730 729

Dry Biomass Stoker 490 Tie 250 242

Coal

FB 82 Tie 56 56

PC 160 Tie 41 40.2

Stoker/Other 270 Log-normal 220 220

Heavy Liquid 10 Tie 10 9.6

Light Liquid 7 Log-normal 7 6.05

Non-Continental 10 Log-normal 18 18.0

Process Gas 4 Tie 4 3.57

Represents the variability selected as the MACT floor emission limit for the subcategory.

Non-continental data in blue underline is represented by #6 Oil data.

 3x RDL Not Applicable for 

CO 

No Data

No Data

No Data

PM (lb/mmBtu)

CO (ppm @ 3% O2)

Notes

No Data

N/A (a)

N/A (a)

No Data

No Data

No Data

No Data

No Data

No Data

Subcategory

Distribution (Normal, Lognormal 

or Tie)

(Lognormal or Ties default to 

lognormal distribution using Bhaumik 

and Gibbons approach for lognormal 

distributions. Normal distributions 

use proposed UPL approach.)

Hg (lb/mmBtu)

HCl (lb/mmBtu)

TSM (lb/mmBtu)

Fuel Variability

No Data

MACT Floor 

(Rounded to two 

Sig Figs)