Laserfiche WebLink
BMP C154: Concrete Washout Area <br />Purpose Prevent or reduce the discharge of pollutants to stormwater from concrete <br />waste by conducting washout off -site, or performing on -site washout in a <br />designated area to prevent pollutants from entering surface waters or <br />ground water. <br />Conditions of Use Concrete washout area best management practices are implemented on <br />construction projects where: <br />• Concrete is used as a construction material <br />• It is not possible to dispose of all concrete wastewater and washout <br />off -site (ready mix plant, etc.). <br />• Concrete trucks, pumpers, or other concrete coated equipment are <br />washed on -site. <br />• Note: If less than 10 concrete trucks or pumpers need to be washed out <br />on -site, the washwater may be disposed of in a formed area awaiting <br />concrete or an upland disposal site where it will not contaminate <br />surface or ground water. The upland disposal site shall be at least 50 <br />feet from sensitive areas such as storm drains, open ditches, or water <br />bodies, including wetlands. <br />• Design and Implementation <br />Installation The following steps will help reduce stormwater pollution from concrete <br />Specifications <br />wastes: <br />• Perform washout of concrete trucks off -site or in designated concrete <br />washout areas only. <br />• Do not wash out concrete trucks onto the ground, or into storm drains, <br />open ditches, streets, or streams. <br />• Do not allow excess concrete to be dumped on -site, except in <br />designated concrete washout areas. <br />• Concrete washout areas may be prefabricated concrete washout <br />containers, or self -installed structures (above -grade or below -grade). <br />• Prefabricated containers are most resistant to damage and protect <br />against spills and leaks. Companies may offer delivery service and <br />provide regular maintenance and disposal of solid and liquid waste. <br />• If self -installed concrete washout areas are used, below -grade <br />structures are preferred over above -grade structures because they are <br />less prone to spills and leaks. <br />• Self -installed above -grade structures should only be used if excavation <br />is not practical. <br />Volume H — Construction Stormwater Pollution Prevention - August 2012 <br />4-47 <br />