This gas, which is known as methane, contributes to global warming. Cumberland County Solid Waste Management in its efforts to be good steward's of the environment enlisted the help of DTE Biomass Energy to collect methane gas. A leachate pond collects liquid that has been filtered through the decomposed waste in the landfill. This liquid is then drained off and deposited into the leachate pond. These ponds are an important aspect of landfill operations otherwise, the liquid could possibly get back into the water table.
Sedimentation ponds are a necessity of landfill operations.
They collect rain water run off. Prior to construction, testing is performed to determine ground water level and materials that can be used in the construction of the new cells. Once this information is determined, the area is excavated and lined with clay and plastic liners. When construction of the cells is completed, then waste may be disposed of in the cells.