Pennsylvania Code
Title 25 - ENVIRONMENTAL PROTECTION
Part I - Department of Environmental Protection
Subpart D - Environmental Health and Safety
Article VIII - Municipal Waste
Chapter 277 - CONSTRUCTION/DEMOLITION WASTE LANDFILLS
Subchapter C - OPERATING REQUIREMENTS
LINER SYSTEM
Section 277.252 - General limitations

(a) The bottom of the subbase of the liner system cannot be in contact with the seasonal high water table or perched water table without the use of groundwater pumping systems.

(b) At least 8 feet shall be maintained between the bottom of the subbase of the liner system and the regional groundwater table in an unconfined aquifer. The regional groundwater table may not be artificially lowered.

(c) In a confined aquifer, at least 8 feet shall be maintained between the bottom of the subbase of the liner system and the top of the confining layer or the shallowest level below the bottom of the subbase where groundwater occurs as a result of upward leakage from natural or preexisting causes. The integrity of the confining layer may not be compromised by excavation.

(d) If the approved design plans provide for the placement of additional adjacent liner:

(e) If the approved design plans do not provide for the placement of additional adjacent liner, waste may not be placed within 15 feet of the inside top of the lined perimeter berm.

(f) A lined perimeter berm at least 4 feet high shall be constructed and maintained along the edge of the lined disposal area to prevent the lateral escape of leachate.

(g) The edge of the liner shall be clearly marked.