VA DEQ ESC INSPECTOR EXAM (ALREADY) PASSED!!
VESCP Answer - Virginia Erosion and Sediment Control Program
- Administered by counties/cities (must), towns (may)
- MUST BE APPROVED
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
, *stone outlet = trap*
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.
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]
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
VESCP Answer - Virginia Erosion and Sediment Control Program
- Administered by counties/cities (must), towns (may)
- MUST BE APPROVED
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
, *stone outlet = trap*
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.
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]
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
