Withstand anticipated loads, stresses and disturbances from overlying waste, waste cover materials and equipment operation. The collection sump shall be of sufficient size to transmit leachate that is generated and shall be capable of automatic and continuous functioning. The perforated piping system shall be sloped, sized and spaced to assure that free flowing liquids and leachate will drain continuously from the protective cover to the collection sump or point. The minimum diameter of the perforated pipes shall be 6 inches with a wall thickness of Schedule-80 or greater as specified by ASTM, or equivalent. The leachate collection system shall contain stones or aggregates.
Solidification is solely dependent on gravity drainage.
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