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Erosion and Sediment Control exam questions with 100- correct answers
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Erosion and Sediment Control exam questions with 100- correct answers
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Erosion and SedimentControl exam questions with
100% correct answers
Minimum Standard 1 - answer Stabilization
permanent or temporary soil stabilization shall be
applied to denuded areas within seven days after
final grade is reached on any portion of the site;
temporary soil stabilization shall be applied within
seven days to denuded areas that may not be at
final grade but will remain dormant for longer than
14 days; permanent stabilization shall be applied
to areas that are to be left dormant for more than
one year
Site NOT at Final Grade - answer - stabilize in 14
days
- temporarily seed
- mulch
- permanently stabilize if dormant > 1 year
Site at Final Grade - answer - stabilize in 7 days
(recommended immediately)
- permanently or temporarily seed and mulch
,- mulch/matting/straw
Minimum Standard 2 - answer Stock Piles, Waste
and Borrow Areas
during construction, soil stock piles and borrow
areas shall be stabilized or protected with
sediment trapping measures
mulch prevents erosion by protecting the surface
from raindrop impact and silt fence intercepts and
detains from disturbed areas
Minimum Standard 3 - answer Permanent
Vegetation
permanent vegetation cover shall be established
on denuded areas not otherwise permanently
stabilized (permanent vegetation shall not be
considered established until a ground cover is
achieved that is uniform, mature enough to
survive, and will inhibit erosion *there is no %
associated with this*)
reduce erosion and decrease sediment yield from
disturbed area
,this is the standard used to verify that a site is
ready for release of bonds or surety
Minimum Standard 4 - answer First-Step Measures
Sediment basins and traps, perimeter dikes,
sediment barriers and other measures intended to
trap sediment shall be constructed as a first step
in any land-disturbing activity and shall be made
functional before upslope land disturbance takes
place
a certain amount of initial land disturbance may be
required to provide access for equipment to install
the perimeter controls, but site clearing and
grading should be kept to a minimum until the
perimeter controls are in place
intercepts and detains small amounts of sediment
from disturbed areas during construction operation
to prevent sediment from leaving the site and
decrease velocity of sheet flows and low-to-
moderate level channel flow
Perimeter Controls - answer assures that sediment
does not leave the perimeter of the land-disturbing
area once site clearing, grading, and construction
commences
, Examples: silt fences, sediment traps, sediment
basins, construction entrance, temporary
diversions, diversions
Minimum Standard 5 - answer Earthen Structure
Stabilization
stabilization measures shall be applied to earthen
structures such as dams, dikes, and diversions
immediately after installation
reduce erosion and sedimentation and reduce
damage from sediment and runoff to downstream
or off-site areas
Minimum Standard 6 - answer Traps and Basins
sediment traps and basins shall be designed and
constructed based upon the total drainage area
(not just disturbed area) to be served by the trap
or basin
Sediment Traps - answer minimum storage
capacity shall be 134 cubic yards per acre of
drainage area and shall only control drainage areas
less than 3 acres
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