Summary of Proposed NOₓ Emission Limits for Industrial Sources
Summary of Proposed NOX Emissions Limits for Pipeline Transportation of Natural Gas
| Engine Type and Fuel | Proposed NOX Emission Limit (grams per horsepower per hour) |
|---|---|
| Natural Gas Fired Four Stroke Rich Burn | 1.0 g/hp-hr |
| Natural Gas Fired Four Stroke Lean Burn | 1.5 g/hp-hr |
| Natural Gas Fired Two Stroke Lean Burn | 3.0 g/hp-hr |
Summary of Proposed NOX Emissions Limits for Kiln Types in Cement and Concrete Product Manufacturing
| Kiln Type | Proposed NOX Emissions Limit (lb/ton of clinker) |
|---|---|
| Long Wet | 4.0 lb/ton |
| Long Dry | 3.0 lb/ton |
| Preheater | 3.8 lb/ton |
| Precalciner | 2.3 lb/ton |
| Preheater/Precalciner | 2.8 lb/ton |
The EPA is also proposing a source cap limit expressed in ton per day (tpd) of NOX for each individual cement plant according to the following equation:
Where:
CAP2015 Ozone Transport = total allowable NOX emissions from all cement kilns located at one cement plant, in tons per day, on a 30-operating day rolling average basis;
KD = 1.7 pounds NOX per ton of clinker for dry preheater-precalciner or precalciner kilns;
KW = 3.4 pounds NOX per ton of clinker for long wet kilns;
ND = the average annual production in tons of clinker plus one standard deviation for the three most recent calendar years from all dry preheater-precalciner or precalciner kilns located at one cement plant; and
NW = the average annual production in tons of clinker plus one standard deviation for the 3 most recent calendar years from all long wet kilns located at one cement plant.
An affected cement plant will need to comply with both the source cap limit and the specific NOX emissions limits assigned to its individual kiln type(s).
Summary of Proposed NOX Emissions Limits for Iron and Steel and Ferroalloy Emissions Units
| Emissions Unit |
Proposed NOX Emissions Standard or Requirement |
|---|---|
| Blast Furnace | 0.03 lb/mmBtu |
| Basic Oxygen Furnace | 0.07 lb/ton |
| Electric Arc Furnace | 0.15 lb/ton steel |
| Ladle/tundish Preheaters | 0.06 lb/mmBtu |
| Reheat furnace | 0.05 lb/mmBtu |
| Annealing Furnace | 0.06 lb/mmBtu |
| Vacuum Degasser | 0.03 lb/mmBtu |
| Ladle Metallurgy Furnace | 0.1 lb/ton |
| Taconite production kilns | Work practice standard to install low NOX technology/burners, test and set |
| Coke ovens (charging and coking) | 0.6 lb/ton of coal charged |
| Coke ovens (pushing) | 0.015 lb/ton of coal pushed |
| Boilers - Coal | 0.20 lb/mmBtu |
| Boilers - Residual oil | 0.20 lb/mmBtu |
| Boilers - Distillate oil | 0.12 lb/mmBtu |
| Boilers - Natural gas | 0.08 lb/mmBtu |
Summary of Proposed NOX Emissions Limits for Furnace Unit Types in Glass and Glass Product Manufacturing
| Furnace | Proposed NOX Emissions Limit (lb/ton of glass produced) |
|---|---|
| Container Glass Manufacturing Furnace | 4.0 lb/ton |
| Pressed/Brown Glass Manufacturing Furnace or Fiberglass Manufacturing Furnace | 4.0 lb/ton |
| Flat Glass Manufacturing Furnace | 9.2 lb/ton |
Summary of Proposed NOX Emissions Limits for High-Emitting Equipment and Large Boilers in Basic Chemical Manufacturing, Petroleum and Coal Products Manufacturing, and Pulp, Paper, and Paperboard Mills
| Unit type | Proposed Emissions limit (lbs NOX/Dry standard cubic feet per million Btu [mmBtu]) |
|---|---|
| Coal | 0.20 lb/mmBtu |
| Residual oil | 0.20 lb/mmBtu |
| Distillate oil | 0.12 lb/mmBtu |
| Natural gas | 0.08 lb/mmBtu |