Stormwater control design goal correct answers Minimize the discharge of pollutants in
stormwater.
SW control design factors correct answers Expected amount and frequency of precipitation, soil
type and range, flow from impervious surfaces, slopes, and BMPs to control flow rates.
Erosion and sediment control requirements correct answers Provide and maintain natural buffers
and/or equivalent erosion and sediment controls for discharges to any receiving waters located
within 50 feet of the site's earth disturbances.
Directing stormwater correct answers Towards vegetated areas, maximize infiltration and
filtering to minimize pollutant discharges unless unadvisable due to geological factors (GW
contamination, karst geography, etc.)
Installing perimeter controls correct answers Must be installed upgradient of any natural buffers,
extend on the contour of a slope with ends curved upwards.
Maintaining perimeter controls correct answers Remove sediment before it has accumulated to
1/2 the height of the control, and if it is ineffective following a precipitation event: extend or
repair controls.
Minimizing sediment track-out correct answers Restricting vehicle use to designated points and
installing tracking controls like wheel washing, rumble plates, and 3-inch gravel.
Managing stockpiles correct answers Away from inlets or concentrated flow areas, install a
sediment barrier along downgradient areas, and if unused for 14+ days provide cover.
Minimizing dust correct answers On areas of exposed soil, apply water or other suppression
techniques.
Soil health factors correct answers Minimize steep slope disturbances, preserve native topsoil
unless infeasible, and minimize soil compaction.
Inlet protection correct answers Install protection measures that remove sediment from
discharges prior to entry (not required for sites with a sediment trap system); and clean or replace
protections as sediment accumulates.
Chemical use and storage correct answers Must be appropriately suited for soil type and treated
discharges. Must be stored in leak-proof containers under storm-resistant covers and surrounded
by secondary containment.
Exposed soil correct answers Must be stabilized and resistant to erosion.
Timeline:
, 5 acres or less--begin stabilizing where activity stops permanently or for more than 14 days
immediately, no more than 14 days.
More than 5 acres--begin stabilizing where activity stops permanently or for more than 14 days
immediately, no more than 7 days.
Turbidity monitoring--dewatering correct answers Must collect a sample from dewatering
discharge each day a discharge occurs, and after it has been treated.
Turbidity benchmark correct answers 50 NTUs
Inspection frequency correct answers At least once every 7 days; or once every 14 days AND
within 24 hours of a storm event that produces 0.25 inches or more precipitation in a 24 hour
period.
General inspection requirements correct answers - Check whether all stormwater controls are
properly installed and working as intended.
- Check for the presence of conditions that could lead to spills, leaks, or other accumulations of
pollutants in the site.
- Identify any locations where new or modified stormwater controls are necessary.
- Check for visual sedimentation and erosion at points of discharge.
Corrective action correct answers Triggered when:
- A stormwater control needs a significant repair or replacement.
- A stormwater control necessary to comply with the permit was improperly or never installed.
- Discharges are not meeting water quality standards.
- Contamination is evident.
- Etc.
Parts of SWPPP correct answers Stormwater team, nature of construction activities, site map,
non-stormwater discharges, description of stormwater controls, procedures for inspection
maintenance and corrective action, procedures for turbidity monitoring from dewatering,
compliance with other requirements (endangered species, historic sites, EPA water stuff, etc.).
Arid areas correct answers Areas with average annual rainfall of 0-10 inches.
CWA correct answers Clean Water Act, or federal water pollution control act.
Dewatering correct answers The act of draining accumulated storm/ground water from building
foundations, vaults, trenches, etc.
Discharge point correct answers The location where collected and concentrated stormwater flows
or dewatering water are discharged from the construction site.
Exposed soils correct answers Soils that as a result of earth-disturbing activities are left open to
the elements.