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VA DEQ ESC Inspector Exam questions and answers.
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VA DEQ ESC Inspector Exam questions and answers.
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VA DEQ ESCInspector Exam
questions and
answers
VESCP
Virginia Erosion and Sediment Control Program
- Administered by counties/cities (must), towns (may)
- MUST BE APPROVED
Minimum Standard 1
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
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Site NOT at Final Grade
- stabilize in 14 days
- temporarily seed
- mulch
- permanently stabilize if dormant > 1 year
Site at Final Grade
- stabilize in 7 days (recommended immediately)
- permanently or temporarily seed and mulch
- mulch/matting/straw
Minimum Standard 2
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
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
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
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
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
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
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
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
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