HomeMy WebLinkAboutElement 9 BMP-C151BMP C151: Concrete Handling
Purpose Concrete work can generate process water and slurry that contain fine
particles and high pH, both of which can violate water quality standards in
the receiving water. This BMP is intended to minimize and eliminate
concrete process water and slurry from entering waters of the state.
Conditions of Use Any time concrete is used, these management practices shall be utilized.
Concrete construction projects include, but are not limited to, the
following:
x Curbs
x Sidewalks
x Roads
x Bridges
x Foundations
x Floors
x Runways
Design and
Installation
Specifications
x Concrete truck chutes, pumps, and internals shall be washed out only
into formed areas awaiting installation of concrete or asphalt.
x Unused concrete remaining in the truck and pump shall be returned to
the originating batch plant for recycling.
x Hand tools including, but not limited to, screeds, shovels, rakes, floats,
and trowels shall be washed off only into formed areas awaiting
installation of concrete or asphalt.
x Equipment that cannot be easily moved, such as concrete pavers, shall
only be washed in areas that do not directly drain to natural or
constructed stormwater conveyances.
x Washdown from areas such as concrete aggregate driveways shall not
drain directly to natural or constructed stormwater conveyances.
x When no formed areas are available, washwater and leftover product
shall be contained in a lined container. Contained concrete shall be
disposed of in a manner that does not violate groundwater or surface
water quality standards.
Maintenance
Standards
Containers shall be checked for holes in the liner daily during concrete
pours and repaired the same day.
February 2005 Volume II – Construction Stormwater Pollution Prevention 4-43