EPA Stormwater & Erosion Control Flashcards
7 cards from real PIC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 EPA Stormwater & Erosion Control flashcards as text
Which type of BMP is classified as a 'source control' measure rather than a 'sediment control' measure?
Answer: Phased clearing and grading
Phased clearing and grading is a source control BMP because it prevents erosion from occurring, whereas sediment controls like silt fences intercept sediment after erosion has begun.
After a 0.5-inch rain event at a paving site, an inspector documents that a silt fence has overtopped and sediment has escaped to a nearby waterway. What is the required response timeline under the EPA CGP?
Answer: Within 24 hours of discovery, initiate repairs and document corrective actions
The CGP requires that whenever a discharge causes or has the potential to cause pollution, the operator must take immediate corrective action and document findings within 24 hours.
What is the primary purpose of a velocity dissipater or riprap apron at a culvert or pipe outlet on a paving project?
Answer: To reduce the energy of discharged water and prevent outlet scour erosion
A riprap apron dissipates the kinetic energy of water exiting a pipe or culvert, preventing the high-velocity discharge from scouring and eroding the channel bed and banks.
An inspector reviewing a SWPPP notes that the site map does not show the locations of all stormwater discharge points. Which CGP requirement does this violate?
Answer: The SWPPP must include a site map showing all areas of disturbance, drainage patterns, and discharge points
The CGP requires the SWPPP to include a site map identifying all disturbance areas, drainage patterns, discharge locations, and BMP placements.
During cold weather operations, a paving inspector observes that BMPs are frozen and non-functional. What does the EPA CGP require in this situation?
Answer: Equivalent alternative BMPs must be implemented to maintain site controls when primary BMPs are non-functional
Operators must implement alternative or supplemental BMPs when standard measures become non-functional due to freezing conditions, maintaining site pollution prevention continuity.
What is the correct method for disposing of water pumped from a dewatering operation at a paving construction site?
Answer: Discharge to a vegetated area or sediment filter bag to remove solids before release
Dewatering discharges must be treated to remove sediment using filter bags, sediment tanks, or vegetated areas before they can be released from the site.
Which of the following activities on a paving project would trigger the need to update and amend the SWPPP?
Answer: A change in construction sequence that alters drainage patterns or disturbed areas
Any change in site conditions, construction sequence, or drainage patterns that affects the stormwater management approach requires the SWPPP to be updated to reflect the new conditions.