Erosion and Sediment Control exam questions with answers

Erosion and Sediment Control exam
questions with answers

Minimum Standard 1 - CORRECT ANSWERS ✔✔Stabilization
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permanent or temporary soil stabilization shall be applied to denuded areas
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within seven days after final grade is reached on any portion of the site;
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temporary soil stabilization shall be applied within seven days to denuded
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areas that may not be at final grade but will remain dormant for longer than
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14 days; permanent stabilization shall be applied to areas that are to be left
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dormant for more than one year
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Site NOT at Final Grade - CORRECT ANSWERS ✔✔- stabilize in 14 days
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- temporarily seed
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- mulch
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- permanently stabilize if dormant > 1 year
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Site at Final Grade - CORRECT ANSWERS ✔✔- stabilize in 7 days
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(recommended immediately)
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- permanently or temporarily seed and mulch
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- mulch/matting/straw
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Minimum Standard 2 - CORRECT ANSWERS ✔✔Stock Piles, Waste and
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Borrow Areas
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,during construction, soil stock piles and borrow areas shall be stabilized or
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protected with sediment trapping measures
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mulch prevents erosion by protecting the surface from raindrop impact and
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silt fence intercepts and detains from disturbed areas
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Minimum Standard 3 - CORRECT ANSWERS ✔✔Permanent Vegetation
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permanent vegetation cover shall be established on denuded areas not
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otherwise permanently stabilized (permanent vegetation shall not be
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considered established until a ground cover is achieved that is uniform,
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mature enough to survive, and will inhibit erosion *there is no % associated
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with this*)
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reduce erosion and decrease sediment yield from disturbed area
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this is the standard used to verify that a site is ready for release of bonds or
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surety
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Minimum Standard 4 - CORRECT ANSWERS ✔✔First-Step Measures
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Sediment basins and traps, perimeter dikes, sediment barriers and other
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measures intended to trap sediment shall be constructed as a first step in any
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land-disturbing activity and shall be made functional before upslope land
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disturbance takes place
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, a certain amount of initial land disturbance may be required to provide access
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for equipment to install the perimeter controls, but site clearing and grading
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should be kept to a minimum until the perimeter controls are in place
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intercepts and detains small amounts of sediment from disturbed areas
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during construction operation to prevent sediment from leaving the site and
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decrease velocity of sheet flows and low-to-moderate level channel flow
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Perimeter Controls - CORRECT ANSWERS ✔✔assures that sediment does not
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leave the perimeter of the land-disturbing area once site clearing, grading,
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and construction commences
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Examples: silt fences, sediment traps, sediment basins, construction entrance,
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temporary diversions, diversions
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Minimum Standard 5 - CORRECT ANSWERS ✔✔Earthen Structure
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Stabilization
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stabilization measures shall be applied to earthen structures such as dams,
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dikes, and diversions immediately after installation
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reduce erosion and sedimentation and reduce damage from sediment and
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runoff to downstream or off-site areas
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Minimum Standard 6 - CORRECT ANSWERS ✔✔Traps and Basins
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