I am able to locate a specific facility location from the map and get a risk at that location. How accurate is that risk value?
Included in the results section of the 2002 NATA are Google Earth maps that show the risk levels estimated for each census tract. Using these map, it is then possible to locate specific facilities, (e.g., schools, day care centers, hospitals, etc.) by entering their specific location information (address or latitude/longitude data) into the Google Earth query. These facilities will then be located within a specific census tract and the NATA results for that tract are readily seen. It should be noted that the concentrations and risk estimated are averaged across the tract and do not necessarily reflect the possible impacts that could occur in the immediate vicinity of these facilities. More focused assessments, (e.g., air toxics monitoring, local-scale risk assessments) would be needed to more accurately determine those concentrations and risks. Top of page 20: I’m familiar with the assessment EPA performed for coke ovens to support their residual risk rulemaking in 2006. The NATA resul
