Stormwater Erosion and Sedimentation Control
Exam
2 soil amendments usually required to permanent seeding - ANS-Fertilizer and lime
3 beneficial functions of mulch - ANS-Protects soil from raindrop erosion
Moderates soil temperature
Moderates soil moisture
Reduced velocity of overland flow
Improves soil texture and/or nutrients
Control/reduce weeds
3 Biological Effects of Erosion and Sedimentation - ANS-Reduced light for aquatic plants
Clogs fish gills
Impairs spawning
Disrupts food chain
Blankets bottom
Suppresses aquatic life
Disrupts ecosystem
3 Physical Effects of Erosion and Sedimentation - ANS-Increased Flooding
Reduced hydraulic capacities in Rivers, Streams, Channels, Reservoirs
Increased maintenance of stormwater systems
Increased water treatment costs
Decreased recreational value
3 purposed of soil roughening - ANS-Aid in establishment of vegetative cover
Reduce runoff velocity
increase infiltration
reduce erosion
Provide for sediment trapping
70% or greater stabilization requires - ANS-14 days to submit NOT
A BMP is not performing - ANS-Replace it with an alternative
A conveyance system is what? - ANS-Stormwater systems
A floating turbidity curtain is designed to ____ sediment laden water and allow enough ____ for
sediments to settle out of suspension - ANS-Contain
Time
A stand of vegetation is considered fully established after ____ - ANS-1 year
A type 3 floating turbidity curtain may be used in considerable flow conditions, meaning less
than ___ feet per second or ___ knots - ANS-5
3
Anchor lines shall be attached to ____ not the_____ - ANS-Bouys
Bottom of the curtain or float
Areas that are at rough grade for 14 days or more should receive_____ seeding immediately -
ANS-Temporary
Average Usable Life of Silt Fence - ANS-6 months
Before discharging chemically treated water, what should you test for? - ANS-PH
Turbidity limits
Can the SWPPP exceed the requirements under part 4 of CGP? - ANS-No
Can you transfer your NOI to a new contractor? - ANS-No
Clay and Much - ANS-Soil particles smaller than .002mm
Cause most erosion and turbidity problems in Florida and World
Construction activity that results in disturbing ___ acres or more total land area - ANS-5
Drainage Area for Temporary Sediment Trap - ANS-Maximum 5 acres
Initial storage capacity 134 cubic yards per acre
Max life is 18 months
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