Site Management
Provide 3 methods for protecting stockpiles to prevent erosion and sediment transport:
• Cover with plastic and secure.
• Mulch.
• Plant stock pile with fast growing grasses.
• Clean equipment to prevent mixing of materials.
• Install silt fencing (need and configuration depends on site and
conditions).
It is defined as distance by which green infrastructure must be from the lines of front of a building on a lot.
what is setbacks
name the layers of a permeable pavement and recommended material type?
1) Aggregate base (#2 stone) , 2) Choker layer (#57 stone), 3) bedding course (#8 stone) 4) paver blocks
Single shallow depression cell used in commerical area
what is a bioretention cell
describe the crushed stone properties used in the base courses
what is angular, uniform, and clean
types of erosion and sediment control. These include site planning, sequencing, and contractor training.
Non-Structural Controls:
The area where the existing soil cover is changed resulting in bare soil.
LOD
provide the layers of a green roof?
what is:
vegetation
media
drainage layer
insulation
membrane
small scale depression often used on residential properties
what is a rain garden
With less _____ , there are channels between the rock that is glued together by the cement allowing water to pass through.
fines
Describe the purpose of a stabilized construction entrance
what is to reduce the tracking of mud and dirt onto public roads by construction vehicles.
what is avoid foot traffic or equipment traffic over areas where compaction is to be avoided.
Provide the layers of Pervious Concrete
What is 1) Aggregate Base, 2) choker (typically not recommended), 3)concrete pavement
Bioretention located along a road and within an area where the curb line has been extended into the road
What is a vegetated curb extension
that provides structural support for the concrete pavement and storage for stormwater.
what is aggregate base
an ESC device used to minimize erosion on construction sites. Made from compost, coir, straw, or mulch, wattles remove sediment and allow clean water to pass through.
what is wattles
Name 2 characteristics of more susceptible sites to erosion
What is:
-Steep slopes.
• Loose (uncompacted) soils.
• Lack of stabilizing surface covering – example,
vegetation, mulch, gravel, pavement, structure, etc.
provide the layers of porous asphalt
what is aggregate base, choker layer, asphalt pavement
provide treatment by infiltrating stormwater vertically through soil, and provide treatment by water moving horizontally along surface and through surface vegetation
liquid or granular materials added to the concrete mix to alter the properties of the concrete. For example, retarding admixtures slow the curing time of the concrete.
Admixtures
Explain the goals of ESC.
Prevent the transport of sediment through stormwater, wind, or by vehicle tires.
• Prevent erosion onsite and downstream by controlling flowrates of stormwater.
Provide 3 types of perimeter controls for erosion and sediment control
What is (i.e. install silt fencing, wattles, berms, etc. as a last layer of protection for stormwater before it leaves the construction site).
provide the layers of a bioretention from bottom to top
what is
1) aggregate storage layer, 2) optional underdrain, 3) Bioretention Media, 4)plants, 5) mulch
extra: overflow and observation well
bioretention located in the right away, typically sidewalk area. Vertical walled reservoir.
What is a bioretention planter?
defined: the binder in concrete consisting of calcium, silicon, aluminum, iron, gypsum and small amounts of other ingredients that are heated and ground to a powder.
Portland cement