Spatial Regulation of Air Toxics Hot Spots

Air Toxics Hot Spots - Non-Cancer TSD

Air Toxics Hot Spots ProgramRisk Assessment GuidelinesPart IITechnical SupportDocument forDescribing AvailableCancer PotencyFactorsApril 1999

Hot Spots Regulation and Environmental Justice

This paper analyzes whether regulating “hot spots” of toxic air pollution by increasing the spatial resolution of regulation could address environmental justice (EJ) concerns. To examine this question, this paper develops a decision model of a regulator choosing emission controls within a net cost minimizing framework. An empirical application of the model using air toxic emission data for Esca...

Spatial characteristics of net methylmercury production hot spots in peatlands.

Many wetlands are sources of methylmercury (MeHg) to surface waters, yet little information exists about the distribution of MeHg within wetlands. Total mercury (THg) and MeHg in peat pore waters were studied in four peatlands in spring, summer, and fall 2005. Marked spatial variability in the distribution of MeHg, and %MeHg as a proxy for net MeHg production, was observed, with highest values ...

Spatial Data Mining: Clustering of Hot Spots and Pattern Recognition

Spatial data mining is the extraction of implicit knowledge, spatial relations or other patterns not explicitly stored in spatial database. The focus of this paper is placed on the information derivation of spatial data. Geographical coordinates of hot spots in forest fire regions, which are extracted from the satellite images, are studied and used in the detection of likely fire points. Due to...