Pennsylvania Code
Title 25 - ENVIRONMENTAL PROTECTION
Part I - Department of Environmental Protection
Subpart D - Environmental Health and Safety
Article IX - Residual Waste Management
Chapter 289 - RESIDUAL WASTE DISPOSAL IMPOUNDMENTS
Subchapter E - ADDITIONAL REQUIREMENTS FOR CLASS II RESIDUAL WASTE DISPOSAL IMPOUNDMENTS
ADDITIONAL OPERATING REQUIREMENTS- LINER SYSTEM
Section 289.532 - General limitations

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

(b) For unconfined aquifers, at least 8 feet shall be maintained between the bottom of the subbase of the liner system and the regional groundwater table. The regional groundwater table may not be artificially lowered.

(c) For confined aquifers, 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 other 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 an additional adjacent liner, the following apply:

(e) If the approved design plans do not provide for the placement of additional adjacent liner, waste may not be placed within 4 feet of an edge of the liner.

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