Higher-Hazard Process (HHP)
Higher-Hazard Process (HHP) : Any activity manufacturing, handling, storing, or using hazardous substances that, when released or ignited, can result in death or irreversible human health effects, significant property or environmental damage, or off-site impacts due to acute toxicity, flammability, explosiveness, corrosiveness, thermal instability, latent heat, or compression. Local regulations may add additional considerations for processes in this category