Construction Site BMPs and Implementation Flashcards
6 cards from real CEPSCI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Construction Site BMPs and Implementation flashcards as text
What is the primary purpose of inlet protection (e.g., a filter sock or gravel bag around a storm drain inlet)?
Answer: To prevent sediment-laden runoff from entering the storm drain system
Inlet protection devices filter sediment out of runoff before it enters the storm drain, preventing sediment from being conveyed off-site through the stormwater system.
A compost sock (bio-roll) used for erosion control is most appropriately installed:
Answer: Along the contour of slopes to intercept sheet flow and filter sediment
Compost socks installed along slope contours intercept and slow sheet flow, filtering sediment and allowing infiltration while the compost material biodegrades over time.
What is a 'diversion' BMP and what is its primary function?
Answer: A constructed channel or berm that intercepts and redirects runoff to a safe outlet or treatment area
Diversions (channels, berms, or ridges) intercept upslope runoff and redirect it away from active disturbed areas or toward a sediment control practice for treatment.
Which temporary stabilization method is most appropriate for areas that will be reactivated within 2 weeks?
Answer: Temporary mulching with straw or hydraulic mulch
Temporary mulching protects bare soil from rainfall impact and erosion without establishing permanent vegetation, making it easy to re-disturb the area when work resumes.
A turbidity curtain (silt curtain) is used to:
Answer: Contain sediment in open water bodies such as rivers, lakes, or bays during in-water work
Turbidity curtains are floating barriers deployed in water bodies to contain sediment plumes generated during in-water construction activities such as dredging or pile driving.
What is the purpose of a 'rock outlet protection' or 'riprap apron' at the end of a culvert or pipe?
Answer: To dissipate the energy of high-velocity discharge and prevent scour of the receiving channel
Riprap aprons absorb the energy of concentrated pipe or channel discharge, preventing erosion of the channel bed and banks immediately downstream.
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