installation of a leachate collection system under a new landfill with a liner and perforated rock.

landfill leachate drain toxic pipe contaminant wastewater conveyance collect capture percolate sand rock plan digger excavator industrial collection groundwater protection new scope design specs perforated permeate drainage capacity slope trench covered underneath waste solid engineering specification hdpe liner installation construction industry harmful system poisonous management environmental contaminated liquid contamination environment