CESSWI- 8 (BMPs) Questions and Answers
100% Solved
Outlet Velocity Protection -designed to prevent scour at stormwater outlets and to
minimize the potential for downstream erosion through velocity dissipation
Pipe Slope Drain -uses piping materials to convey flow down a slope without causing
erosion damage to the slope
Retaining Walls -built against a slope or bank of a water body or water conveyance, roads,
and slopes behind structures to prevent slope failure
Limitations= require a site specific design and should be done by a P.E.
Rip-Rap -utilizes large, coarse, angular rock, frequently underlain with filter fabric
designed to protect soil from areas of concentrated flow such as channels or ditches, stabilize
slopes experiencing soil or seepage difficulties, increase infiltration, dissipate run-off velocity
Rock Check Dam -designed to capture sediment in stormwater runoff and slow the
velocity of that stormwater to prevent further site erosion
, Swales -designed to channel and convey runoff in a non-erosive manner to a discharge
point located downstream
Concrete Washout Area -contains concrete removed from vehicles/equipment by washing
and prevents it from entering storm drains or waterbodies
Limitations= only as effective as the training of employees
Dust Control -designed to reduce or eliminate airborne dust created by construction and
construction-related activities
Equipment Maintenance and Cleaning -designed to provide workers with the training and
locations for the repair, maintenance, fueling, and cleaning of equipment so that fluids
used/collected in these processes may be trapped and prevented from being introduced to
stormwater flow
Limitations= high costs, permits may be required
Materials Management -designed to minimize or prevent the release of pollutants to
stormwater
100% Solved
Outlet Velocity Protection -designed to prevent scour at stormwater outlets and to
minimize the potential for downstream erosion through velocity dissipation
Pipe Slope Drain -uses piping materials to convey flow down a slope without causing
erosion damage to the slope
Retaining Walls -built against a slope or bank of a water body or water conveyance, roads,
and slopes behind structures to prevent slope failure
Limitations= require a site specific design and should be done by a P.E.
Rip-Rap -utilizes large, coarse, angular rock, frequently underlain with filter fabric
designed to protect soil from areas of concentrated flow such as channels or ditches, stabilize
slopes experiencing soil or seepage difficulties, increase infiltration, dissipate run-off velocity
Rock Check Dam -designed to capture sediment in stormwater runoff and slow the
velocity of that stormwater to prevent further site erosion
, Swales -designed to channel and convey runoff in a non-erosive manner to a discharge
point located downstream
Concrete Washout Area -contains concrete removed from vehicles/equipment by washing
and prevents it from entering storm drains or waterbodies
Limitations= only as effective as the training of employees
Dust Control -designed to reduce or eliminate airborne dust created by construction and
construction-related activities
Equipment Maintenance and Cleaning -designed to provide workers with the training and
locations for the repair, maintenance, fueling, and cleaning of equipment so that fluids
used/collected in these processes may be trapped and prevented from being introduced to
stormwater flow
Limitations= high costs, permits may be required
Materials Management -designed to minimize or prevent the release of pollutants to
stormwater
