HB 1205 landfills
Numerous landfills in Virginia met the above requirements and continue to operate under the provisions of Section 10.1-1408.1.N. (HB 1205). After October 9,1993, all new facilities, and lateral expansions of existing facilities are required to comply with the requirements of Subtitle D.
As a result of this regulatory and legislative history, landfills either continued operating, became inactive, or closed. The active MSW landfills in Virginia are categorized into one of the following three categories:
Subtitle D landfill -This means a landfill that is underlain by a composite liner consisting of two feet of clay, combined with a flexible membrane liner, or an approved alternate liner (i.e., the liner meets EPA's Subtitle D criteria). Landfills of this type were typically constructed after October, 1993.
Non-Subtitle D landfill - This means a landfill that may be unlined, or may have a liner, but the liner has not been demonstrated to meet the regulation in effect after 1993. Landfills of this type were typically constructed prior to October, 1993.
Combination landfills -This means landfills of which some portions have a Subtitle D composite liner, while other portions either have no liner or a Non-Subtitle D liner. Combination landfills typically monitor ground water over the entire combined area. If ground water contamination is detected, it is not possible to differentiate which area (Subtitle D or Non-Subtitle D) has impacted the ground water.