Most systems are closed loop, meaning that the same water & environmentally friendly antifreeze mixture is continually circulated throughout the loop field; it never escapes. Closed loop is the only type of loop field allowed by some states.
An open loop field, sometimes called "pump & dump", requires an ample source of groundwater. Open loops are less common than closed loops because they require an significant water source below the surface.
CSV or XML files containing information such as definition, unique ID, and URL for each BEDES Term or List Option can be downloaded by clicking the appropriate orange button. The downloaded file can then be processed offline. Note that the XML documents are simply a "flat file" of terms, not a structured schema.