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SDEP Stormwater
Erosion is - correct answers ✔✔The process by which the land surface is worn away by the action of wind, water, and gravity. Which of the following describes sedimentation? - correct answers ✔✔The settling out of soil particles transported by water and wind. The main two types of soil erosion discussed in this training are: - correct answers ✔✔Wind and water An example of a physical effect of erosion and sedimentation is: - correct answers ✔✔Increased flooding. What are the four factors that influence the erosion potential of an area? - correct answers ✔✔Soil characteristics, vegetative cover, topography, and climate. Best Management Practices (BMPs) for erosion and sedimentation control include which of the following? - correct answers ✔✔Silt fence and soil stabilization. Projects with which of the following issues could experience an enforcement action and possibly monetary penalties from regulatory agencies: - correct answers ✔✔Any of the above When is Construction Generic Permit (CGP) coverage required? - correct answers ✔✔When your site disturbs over 1 acre or is less than 1 acre and part of a larger project
What are the concerns when dewatering discharges go offsite? - correct answers ✔✔Turbidity, erosion, flooding, release of contaminated groundwater and other surface water quality violations. What areas should be evaluated during your weekly/rain event inspections? - correct answers ✔✔All of the above Which of the following is considered a surface water quality violation? - correct answers ✔✔Turbidity level is greater than 29 NTU above natural background conditions. Within ____ calendar days after your site has achieved final stabilization and all discharges are eliminated, you must submit your NOT form according to the Construction Generic Permit (CGP)
- correct answers ✔✔14 days BMP maintenance activities can be classified into categories including __________. - correct answers ✔✔All of the above How long does the operator have to update or revise the stormwater pollution prevention plan (SWPPP) when site conditions have changed? - correct answers ✔✔7 Days Along with clearing, grading and excavating, the FDEP has determined that _____ also meet the definition of construction activity. - correct answers ✔✔demolition activities What is a major impact of sedimentation? - correct answers ✔✔All of the above A temporary sediment trap must have an initial storage volume of _____ cubic yards or _____ cubic feet per acre of drainage area, measured from the low point of the ground to the crest of the gravel outlet? - correct answers ✔✔134/3,
A detention basin is designed to store stormwater on site and then _________. - correct answers ✔✔Release at a controlled rate The four principle factors influencing soil erosion are: - correct answers ✔✔Vegetation, Soils, Topography, & Climate Keep runoff velocities _______and________runoff on the site. - correct answers ✔✔Low/Retain An important principle of erosion and sediment control is to implement a thorough ______ and _________program. - correct answers ✔✔Maintenance & Follow-Up Apply _______practices to prevent excessive on-site damage. - correct answers ✔✔Erosion Control During Phase I of site development even the smallest sites will require the installation of practices prior to site clearing and grading. - correct answers ✔✔Perimeter Control Proper fertilizer and pesticide application control under the GI-BMP Program is what kind of BMP? - correct answers ✔✔Perimeter Control In flowing water, turbidity curtains should be placed ______to the direction of flow in the receiving water body. - correct answers ✔✔Parallel (along) For a type III turbidity barrier installation, where are the anchor lines attached? - correct answers ✔✔Buoy
What do we want to avoid when constructing a retention basin with heavy equipment, especially on the basin floor? - correct answers ✔✔Excessive Compaction During construction, how often should inlets, outlets, and other control structures be inspected? - correct answers ✔✔Weekly (every 7 days) and After every 1/2" or greater rain storm What should you look for when inspecting storm drain inlets after major storms? - correct answers ✔✔Clogging, bypassing & piping What should you look for when inspecting outlets (i.e., mitered end) after major storms? - correct answers ✔✔Erosion and/or sediment The maximum spacing between check dams should be such that the _____of the upstream dam is at the same elevation as the _________of the downstream dam. - correct answers ✔✔Bottom/Top A stand of vegetation is considered fully established after how long? - correct answers ✔✔ 1 year An outlet protection device is designed to prevent scour at outlets and minimize erosion downstream by reducing the _____of concentrated stormwater flows. - correct answers ✔✔Velocity When placing riprap, great care must be taken to avoid damaging the _______while placing the stone. - correct answers ✔✔Geotextile What could happen to blown straw mulch which is not anchored, crimped, or tacked? - correct answers ✔✔It could be blown or washed away
During the building construction stage, two concerns for the inspector are: - correct answers ✔✔Increased Traffic and Excavation When should sediment control BMPs be removed? - correct answers ✔✔When the inspector & superintendent agree that the area is stabilized Unless otherwise specified, when should accumulated sediments be removed from a sediment control BMP? - correct answers ✔✔At 50% capacity In dealing with the public it is most important to follow proper legal procedures of your company and to always be _______ and ________. - correct answers ✔✔Courteous and Fair Where and how often should the inspector write a report? - correct answers ✔✔At the construction site, and every 7 calendar days or after a 1/2" rain event. When you arrive at the construction site, you should start your inspection by? - correct answers ✔✔Start at the lowest discharge point sampling with your turbidity meter and work your way back to the highest point on the job site What does undercutting of a silt fence indicate? - correct answers ✔✔Improper installation What do gullies in a channel bottom indicate? - correct answers ✔✔Too much velocity for the selected channel lining What parts of a stormwater pond are most likely to fail due to improper compaction? - correct answers ✔✔Structural elements (i.e. pipes)
What is the purpose of an exfiltration trench? - correct answers ✔✔Provide below ground retention The key to efficient and cost-effective erosion control is to plan construction activities in _______to reduce the erosion potential of the site. - correct answers ✔✔Phases Pollution source control planning on an active construction site should cover the following elements: - correct answers ✔✔All of the above. _____are the last line of defense and one of the most visible and maintenance-intensive BMPs on an active construction site. - correct answers ✔✔Perimeter controls A silt fence should only be installed for sediment capture under ______conditions. - correct answers ✔✔Sheet Flow When properly installing a silt fence, a trench shall be excavated approximately ______, backfilled and compacted. - correct answers ✔✔4" deep and 4" wide A _______is intended to divert overland sheet flow to a stabilized outlet or a sediment-trapping facility during the establishment of permanent stabilization on sloping, disturbed areas. - correct answers ✔✔temporary diversion berm Various storm drain inlet protection devices are available for different applications depending on the site conditions and type of inlet; however, all are for drainage areas no greater than ___________acre(s). - correct answers ✔✔ 1 If a sediment basin is designed as a permanent structure, the bottom of the basin should be excavated to 6-12 inces higher than the eventual bottom of the retention to ensure
Sediments should be removed before they reach _______ of the original height of any BMP. - correct answers ✔✔50% Your erosion control plan is the same as your SWPPP. - correct answers ✔✔False Best Management Practices (BMPs) are not necessary for a site smaller than one acre. - correct answers ✔✔False Mulching, seeding, and sodding are examples of soil stabilization methods. - correct answers ✔✔True Maximizing the amount of soil that is exposed on a construction site is an effective way to prevent and control erosion. - correct answers ✔✔False Clogged fish gills and reduced light for aquatic plants are examples of biological effects of erosion and sedimentation. - correct answers ✔✔True Vegetative cover plays an extremely important role in controlling erosion. - correct answers ✔✔True Sediment control practices require less maintenance than erosion control practices. - correct answers ✔✔False Curb inlet protection devices should have an overflow space so as to prevent flooding. - correct answers ✔✔True Physical impacts of erosion are inexpensive and easily managed. - correct answers ✔✔Falso
You don't have to control erosion on projects smaller than one acre. - correct answers ✔✔False Inspectors should let contractors know immediately if there is a problem with their site's erosion and sediment control measures. - correct answers ✔✔True Under the NPDES program you have 30 days to repair a damaged silt fence. - correct answers ✔✔False Silt and sand are the two soils that cause turbidity issues in Florida. - correct answers ✔✔False Rain events less than 0.50 inches do not require a NPDES inspection. - correct answers ✔✔True Temporary construction entrances need at least 6" of stone thickness to properly support vehicle weight. - correct answers ✔✔True A stand of permanent grass vegetation is considered established after two mowing events. - correct answers ✔✔False A paved flume should have hydrostatic relief holes when seasonal high water table or seepage from slopes is a concern. - correct answers ✔✔True Three examples of non-structural stormwater BMPs are: - correct answers ✔✔education, street sweeping & concrete wash-outs
