Leskovac was the first city in Serbia which had a sanitary landfill. The term "landfill" is usually shorthand for a municipal landfill or sanitary landfill. It is systematically disposed in a centralized sanitary landfill site. Morocco has also seen benefits from implementing a $300 million sanitary landfill system. Sanitary landfill sites occupy former sand quarries. Sanitary landfill sites are notable in this regard. The site had been used since 1969 as a sanitary landfill. However, a near-constant flow is restored further downstream by stormwater from the Keystone Sanitary Landfill. If disposed of in a sanitary landfill, most traditional plastics do not readily decompose. The sanitary landfill is an engineered facility that separates and confines waste. The city government operates a 1.5 hectare sanitary landfill in Barangay Banquerohan. As of 2011, there is approximately one sanitary landfill site per municipality. In 1998, the Inayawan Sanitary Landfill was constructed to ease garbage disposal within the city.