Finally, Gilbreath et al. [ 28] studied births in 197 Native Alaskan villages containing open dumpsites with hazardous waste, scoring the exposure into high, intermediate and low hazard level on the basis of maternal residence.
"It may be a low hazard, but it's not completely benign".
The rest of the dams are considered "low hazard," posing little risk to lives or property.
The state Department of Environmental Protection has ordered all of the state's dams inspected, even the 1,400 considered "low hazard".
The state, which has since passed legislation that makes it virtually impossible to build private dams, classifies them in three categories: high hazard, significant hazard and low hazard.
The environmental agency relied on self-reporting by utilities to compile the list, and the T.V.A. rated all its sites, including Kingston, "low hazard".
Dams in the first two categories have to be inspected every two years, Mr. Moyle said, and those in the low hazard category every four years.
Desirable properties for propellant combinations are low molecular mass and high temperature of reaction products (for high exhaust velocity), high density (to minimize tank weight), low hazard factor (e.g., corrosivity and toxicity), low environmental impact, and low cost.
area was occupied by very low hazard zone, 69.77 sq.
area was under low hazard zone, 51.13 sq.
