CPESC Site Assessment & Planning 3

Question 1

Which element of a Stormwater Pollution Prevention Plan (SWPPP) specifically addresses the sequence of BMPs to be installed before, during, and after construction?

Accepted Answer

BMP implementation schedule and sequence

Answer

The BMP implementation schedule details the timing and sequencing of erosion and sediment controls relative to construction activities.

Question 2

A slope aspect analysis during site assessment is most valuable for predicting:

Accepted Answer

Soil moisture and vegetation recovery rates after disturbance

Answer

Slope aspect (north vs. south facing) significantly affects solar radiation, moisture retention, and the ability of vegetation to establish after disturbance.

Question 3

When delineating drainage areas for a construction site, which tool provides the most accurate watershed boundary information?

Accepted Answer

LiDAR-derived digital elevation models (DEMs)

Answer

LiDAR-derived DEMs provide high-resolution elevation data that enables accurate automated watershed delineation, especially in flat or complex terrain.

Question 4

The 'design storm' used for sizing sediment basins on most construction sites is typically:

Accepted Answer

The 10-year, 24-hour storm event

Answer

Most state regulations and guidance documents require sediment basins to be sized for the 10-year, 24-hour storm event to provide adequate protection.

Question 5

Which type of soil map unit description is most useful when planning erosion control BMPs for a construction site?

Accepted Answer

Erodibility (K value), slope range, and drainage class

Answer

K values (erodibility), slope range, and drainage class directly inform BMP selection, placement, and sizing decisions for erosion control.

(CPESC) Certified Professional in Erosion and Sediment Control Practice Test

(CPESC) Certified Professional in Erosion and Sediment Control Practice Test

CPESC Site Assessment & Planning 3