Glossary H
The Hazardous Air Pollutant Exposure Model, Version 4 (HAPEM4) is a computer model that has been designed to estimate inhalation exposure for specified population groups and air toxics.
A Hazardous and Solid Waste Amendments (HSWA) is amendments to RCRA,
Deutsch: Gefährlicher Abfall / Español: Residuos Peligrosos / Português: Resíduos Perigosos / Français: Déchets Dangereux / Italiano: Rifiuti Pericolosi /
A Hazardous Waste is by-product s or waste materials of manufacturing and other processes that have some dangerous property; generally categorized as corrosive, ignitable, toxic, or reactive, or in some way harmful to people or the environmentDeutsch: Kopfabbruch / Español: Cabeceo erosivo / Português: Corte de cabeceira / Français: Érosion de tête / Italiano: Erosione di testa
A headcut in the environmental context refers to the abrupt change in elevation or a vertical step in a Streambed or soil Surface, often caused by erosion processes. It is commonly seen in gullies, Stream channels, or riverbanks and represents an active zone of erosion where water flow causes the soil or sediment to break and retreat upstream.