NPL
The National Priorities List allows for highly hazardous sites that need immediate remediation efforts to be addressed. For a site to achieve NPL status it goes through a rigid process. The Hazard Ranking System Package is a score given to substances deemed hazardous, based on severity and potential hazard to human health, including contamination of water and food sources. Also the impact on the natural ecosystem coming in contact with the hazardous substance is taken into account. A Hazard Ranking System Package score is based on a one-hundred point scale. A score of 28.5 or higher designates a site placement on the NPL. After a score is achieved it must then go through an approval process to receive NPL status.
Read more about this topic: Kalamazoo Superfund Site