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