Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 811 - STANDARDS FOR NEW SOLID WASTE LANDFILLS
Subpart C - PUTRESCIBLE AND CHEMICAL WASTE LANDFILLS
Section 811.307 - Leachate Drainage System
Current through Register Vol. 48, No. 38, September 20, 2024
a) The leachate drainage system shall be designed and constructed to operate for the entire design period.
b) The system shall be designed in conjunction with the leachate collection system required by Section 811.308:
c) A drainage layer shall overlay the entire liner system. This drainage layer shall be no less than 0.30 meter (one foot) thick and shall have a hydraulic conductivity equal to or greater than 1 X 10-3 centimeters per second.
d) The drainage layer shall be designed to maintain laminar flow throughout the drainage layer under the conditions described in subsection (b).
e) The drainage layer shall be designed with a graded filter or geotextile as necessary to minimize clogging and prevent intrusion of fine material.
f) Materials used in the leachate collection system shall be chemically resistant to the wastes and the leachate expected to be produced.