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The Department promotes the composting of farm waste including animal manure. Currently, the DEP exempts from permit requirements any operation that composts up to 10,000 cubic yards of leaves, vegetative waste or other compost materials on a 3-acre site. Any operation that composts materials beyond these thresholds requires a DEP Solid Waste permit. Currently, the Department is working with the NJDEP to facilitate the certification of several manure compost operations as research, development and demonstration (RD&D) projects.