AST Registration Graphical Information
WVDEP has been asked a number of questions about data related to the AST registration. Therefore, WVDEP is providing some graphical information concerning number of tanks, tank levels, tank age, and capacity to further the understanding of the AST universe in West Virginia.
The information utilized to create these graphs came from information obtained from the Tank Owners during the AST registration process. The WVDEP continues to receive registrations and or amendments to previously approved registrations. Therefore, the data on tanks is very fluid and constantly changing. These graphs are based upon information derived from a data pull on January 12, 2016.
Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), commonly known as Superfund, was enacted by Congress on December 11, 1980. CERCLA is a federal law designed to clean up sites contaminated with hazardous substances. The Act required the EPA to prepare a list of substances that are most commonly found at facilities on the National Priorities List (NPL) and which are determined to pose the most significant potential threat to human health due to their known or suspected toxicity and potential for human exposure at these NPL sites.
“Source water protection area (SWPA)” for a public groundwater supply source is the area within an aquifer that supplies water to a public water supply well within a five-year time-of-travel, and is determined by the mathematical calculation of the locations from which a drop of water placed at the edge of the protection area would theoretically take five years to reach the well.
“Zone of critical concern (ZCC)” for a public surface water supply is a corridor along streams within a watershed that warrant more detailed scrutiny due to its proximity to the surface water intake and the intake’s susceptibility to potential contaminants within that corridor. The zone of critical concern is determined using a mathematical model that accounts for stream flows, gradient and area topography. The length of the zone of critical concern is based on a five-hour time-of-travel of water in the streams to the water intake. The width of the zone of critical concern is one thousand feet measured horizontally from each bank of the principal stream and five hundred feet measured horizontally from each bank of the tributaries draining into the principal stream.