Erosion and Sediment Control 2025/2026
Exam Questions with 100% Correct
Answers | Latest Update
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
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, 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
Exam Questions with 100% Correct
Answers | Latest Update
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
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, 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
