Glossary
Standards and regulations
EPA New Source Performance Standards
Also known as NSPS, New Source Performance Standards, Subpart D / Da / Db.
EPA NSPS (New Source Performance Standards) are US Environmental Protection Agency emission limits for newly constructed and significantly modified industrial sources. Subparts D, Da and Db cover steam-generating units (utility boilers); other subparts cover dozens of additional industrial categories.
Key subparts for Sylio's market
| Subpart | Sector |
|---|---|
| D | Steam-generating units constructed 1971–1978 |
| Da | Utility steam-generating units constructed after 1978 |
| Db | Industrial-commercial-institutional steam-generating units |
| Dc | Small industrial steam-generating units |
| Ea / Eb | Municipal waste combustors |
| F | Portland cement plants |
| Y | Coal preparation plants |
NSPS limits typically demand operating particulate-control equipment (ESP, baghouse) at the upper end of its design capability, which is best achieved with active cleaning that preserves performance over the operating cycle.
Related terms
Related terms
- Mercury and Air Toxics StandardsMATS sets limits on mercury, acid gases and other hazardous air pollutants from US coal-fired and oil-fired power plants. Driver for ESP/baghouse retrofits and tightening particulate control.
- Electrostatic precipitatorAn ESP removes particulate from flue gas by charging dust and collecting it on plate electrodes. Sonic horns are widely used to dislodge ash from plates and to keep hoppers from bridging.