Erosion & Sediment Control Test With Complete Solutions

Erosion & Sediment Control Test With
Complete Solutions
Why do we need to have erosion and sediment control? CORRECT ANSWERS We are
trying to control unnatural erosion and sedimentation of waterways

Causes for construction site erosion (2) CORRECT ANSWERS - Removal of vegetative
cover
- Increased stormwater velocities due to impervious surfaces

Turbidity CORRECT ANSWERS Cloudiness or haziness of a fluid caused by large
numbers of suspended [soil] particles

Erosion Control CORRECT ANSWERS Keeping soil in place using vegetation or other
means

Sediment Control CORRECT ANSWERS Dealing with soil once it's dislodged & in
suspension; keeping erosion on site so it does not cause pollution downstream

5 keys to prevent erosion CORRECT ANSWERS 1. minimize disturbed areas & protect
natural features
2. phase construction
3. control stormwater flow
4. stabilize the soils
5. protect slopes

5 keys to prevent sedimentation CORRECT ANSWERS 1. protect storm drain inlets
2. establish perimeter controls
3. retain sediment onsite
4. establish stabilized construction exits
5. inspect & maintain controls

use when erosion prevention fails

Erosion and Sediment Control Plan CORRECT ANSWERS 1. Describes the potential
for erosion and sedimentation problems on a construction site
2. Explains and illustrates the measures that will
be taken to control those problems

Runoff control measures (8) CORRECT ANSWERS - Rock check dam
- Gabions
- Socks
- Straw Wattles
- Coir Wattles