EROSION AND SEDIMENT CONTROL UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
Question:
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
Question:
Site NOT at Final Grade
Answer:
- stabilize in 14 days - temporarily seed - mulch - permanently stabilize if
dormant > 1 year
Question:
Site at Final Grade
Answer:
- stabilize in 7 days (recommended immediately) - permanently or temporarily
seed and mulch - mulch/matting/straw
Question:
Minimum Standard 2
Answer:
Stock Piles, Waste and Borrow Areas
during construction, soil stock piles and borrow areas shall be stabilized or
pro-tected with sediment trapping measures
mulch prevents erosion by protecting the surface from raindrop impact and
silt fence intercepts and detains from disturbed areas
Question:
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
,Question:
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
Question:
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
Question:
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
Question:
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
Question:
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
*stone outlet = trap*
Question:
Sediment Basins
Answer:
surface runoff from disturbed areas that is comprised of flow from drainage
areas greater than or equal to 3 acres shall be controlled by a basin; minimum
, storage capacity of a sediment basin shall be 134 cubic yards per acre of
drainage area; the outfall system shall, at a minimum, maintain the structural
integrity of the basin during a 25-year storm of 24-hour duration; runoff
coefficients used in runoff calculations shall correspond to a bare earth
condition or those conditions expected to exist while the sediment basin is
utilized.
Question:
Sediment Trapping Devises
Answer:
1. place near the lowest drainage points of a project
2. install as a first-step measure [MS-4]
3. stabilize immediately [MS-5]
4. must include outlet protection for basins [MS-11]
Question:
Minimum Standard 7
Answer:
Cut and Fill Slopes
roughening the surface of the slope decreases runoff, lowers the velocity
runoff, increases water retention, and leads to better seed germination
slopes that are found to be eroding excessively within on year of permanent
stabilization shall be provided with additional slop stabilizing measures until
the problem is corrected
Question:
Minimum Standard 8
Answer:
Concentrated Runoff
shall not flow down cut or fill slopes unless contained within an adequate
temporary or permanent channel, flume or slope drain structure
outlets of these drains need outlet protection to prevent erosion from the
concentrated flow
size of pipe depends on drainage area
temporarily conduct concentrated stormwater runoff safely down the face of a
cut or fill slope without causing erosion on or below the slope
Question:
Minimum Standard 9
Answer:
Water Seeps
whenever water seeps from a slope face, adequate drainage or other
protection shall be provided
cut and fill operations may expose shallow aquifers or groundwater tables
from which water may seep through the side of a slope
Question:
Minimum Standard 10
Answer:
Inlet Protection
all storm sewer inlets that are made operable during construction shall be
QUESTIONS AND CORRECT ANSWERS
Question:
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
Question:
Site NOT at Final Grade
Answer:
- stabilize in 14 days - temporarily seed - mulch - permanently stabilize if
dormant > 1 year
Question:
Site at Final Grade
Answer:
- stabilize in 7 days (recommended immediately) - permanently or temporarily
seed and mulch - mulch/matting/straw
Question:
Minimum Standard 2
Answer:
Stock Piles, Waste and Borrow Areas
during construction, soil stock piles and borrow areas shall be stabilized or
pro-tected with sediment trapping measures
mulch prevents erosion by protecting the surface from raindrop impact and
silt fence intercepts and detains from disturbed areas
Question:
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
,Question:
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
Question:
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
Question:
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
Question:
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
Question:
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
*stone outlet = trap*
Question:
Sediment Basins
Answer:
surface runoff from disturbed areas that is comprised of flow from drainage
areas greater than or equal to 3 acres shall be controlled by a basin; minimum
, storage capacity of a sediment basin shall be 134 cubic yards per acre of
drainage area; the outfall system shall, at a minimum, maintain the structural
integrity of the basin during a 25-year storm of 24-hour duration; runoff
coefficients used in runoff calculations shall correspond to a bare earth
condition or those conditions expected to exist while the sediment basin is
utilized.
Question:
Sediment Trapping Devises
Answer:
1. place near the lowest drainage points of a project
2. install as a first-step measure [MS-4]
3. stabilize immediately [MS-5]
4. must include outlet protection for basins [MS-11]
Question:
Minimum Standard 7
Answer:
Cut and Fill Slopes
roughening the surface of the slope decreases runoff, lowers the velocity
runoff, increases water retention, and leads to better seed germination
slopes that are found to be eroding excessively within on year of permanent
stabilization shall be provided with additional slop stabilizing measures until
the problem is corrected
Question:
Minimum Standard 8
Answer:
Concentrated Runoff
shall not flow down cut or fill slopes unless contained within an adequate
temporary or permanent channel, flume or slope drain structure
outlets of these drains need outlet protection to prevent erosion from the
concentrated flow
size of pipe depends on drainage area
temporarily conduct concentrated stormwater runoff safely down the face of a
cut or fill slope without causing erosion on or below the slope
Question:
Minimum Standard 9
Answer:
Water Seeps
whenever water seeps from a slope face, adequate drainage or other
protection shall be provided
cut and fill operations may expose shallow aquifers or groundwater tables
from which water may seep through the side of a slope
Question:
Minimum Standard 10
Answer:
Inlet Protection
all storm sewer inlets that are made operable during construction shall be
