When working in waterways or wetlands, which permit is required? - Answers 404 Permit
NPDES - Answers National Pollutant Discharge Elimination System
Section of CWA (Clean Water Act) to permit stormwater discharges associated with industrial
activities per the permit
CWA Penalty Types - Answers Class I. Negligent
Class II. Knowingly = Greater Fines
What documents are required onsite? - Answers SWPPP
CGP
Site Map
Drawings and Key
All inspection reports
Any amendments to SWPPP
Who is the "Operator" - Answers Usually the OWNER of the site, not the contractor, unless
authorized by the owner to general contractor to have day-to-day operational control
Vertical Projects - Answers Homebuilding, smaller residential construction projects
Usually multiple subcontractors
Requires a lot of housekeeping
LDP - Answers Land Developing Projects - altering landscape for projects
Big Box Projects - Answers Commercial buildings
Mass grading and mass chaos
Limits site access and continually changing (high activity)
Linear Priojects - Answers Roadways, utilities, and stream corridors
Long narrow sites and mass chaos
Highly visible with fairly large footprint
What is erosion? - Answers The process by which soil particles get displaced by the act of wind
or water
, What are three types of wind erosion - Answers Surface Creep, Saltation, and Suspension
What is surface creep? - Answers Rolling and sliding movement of particles across a surface. 5-
25% total soil loss by wind
What is saltation? - Answers Hopping and bouncing movement of particles. 50-80% total soil
loss by wind
What is suspension? - Answers Small, lightweight particles carried great distances by wind.
Less than 10% total soil loss by wind
What are the types of water erosion? - Answers Raindrop erosion, sheet erosion, rill and gully
erosion, stream and channel erosion, shoreline erosion, landslides
What is sheet erosion? - Answers Stripping of soil that occurs due to sheet flows of runoff
Rill and Gully Erosion - Answers If the runoff is allowed to concentrate and gain velocity or
energy, it will cut rills and gullies as it detaches more soil particles
Rills: </= to 3" deep
Gullies: 3 or more rills converted to greater that 3" deep
Streambank/Channel Erosion - Answers Removal of soil and other embankment materials due
to concentrated channel flows
T/F: Rills are more than 75mm deep and are often the start of gullies - Answers False: gullies
are more than 75mm deep
What factors impact rainfall erosion? - Answers Climate events, soil erodibility, length of flow
down a slope, slope of land (critical), erosion control BMPs, sediment control BMPs
T/F: Clay is highly erodible - Answers False
What is sediment? - Answers The eroded material suspended in water or air
Flocculants - Answers Chemicals added to a mixture to make suspended particles clump
together.
Cationic (bad), Anionic (good)
Who decides the necessary BMPs in the SWPPP for a project? - Answers Developer/Designer
(not inspector)
Types of EC BMPs - Answers Placement of pavement, installing landscaping materials,
establishing vegetation, construction of homes, culverts/slope drains, diversion channels, ECB
and TRMs