United States Manager of Landfill Operations (MOLO) Practice Test

The main idea is that cover in a sanitary landfill refers to the material spread over waste at the end of each day to control nuisance factors. Specifically, it is soil or an approved alternative daily cover used to cover exposed solid waste. This daily layer helps reduce odors, deters pests and vectors, minimizes windblown litter, limits moisture infiltration, and enhances on-site safety as the next lift of waste is worked. It is different from a final cap, which is the permanent impermeable top layer installed when the landfill is closed. The other options describe unrelated concepts (a final impermeable top layer, a windrow composting pile, or a temporary lid for a container) and don’t fit the definition.