CSC Remediation & Mitigation Strategies 3

Question 1

Which remediation technology applies heat to contaminated soil to volatilize and destroy organic contaminants without excavating the material?

Accepted Answer

In-situ thermal treatment (ISTT)

Answer

ISTT techniques such as electrical resistance heating or steam injection heat subsurface soils in place to volatilize and destroy organic contaminants.

Question 2

A remediation contractor proposes a permeable reactive barrier (PRB) filled with zero-valent iron (ZVI). What is the primary contaminant target for ZVI PRBs?

Accepted Answer

Chlorinated solvents in groundwater

Answer

ZVI in PRBs chemically reduces chlorinated solvents like TCE to less harmful compounds (ethene) as groundwater passively flows through the barrier.

Question 3

Under the CERCLA framework in the US, which document formally presents the selected cleanup remedy for a Superfund site?

Accepted Answer

Record of Decision (ROD)

Answer

The Record of Decision (ROD) is the official US EPA document that describes and justifies the selected cleanup remedy for a Superfund site.

Question 4

A sustainability consultant recommends green infrastructure to mitigate urban heat islands. Which combination of strategies is most effective?

Accepted Answer

Planting urban trees, installing green roofs, and using cool pavements

Answer

Combining urban trees, green roofs, and cool pavements addresses urban heat islands through shading, evapotranspiration, and increased surface albedo.

Question 5

What is the primary purpose of institutional controls (ICs) in a contaminated site cleanup?

Accepted Answer

Restrict land use and prevent exposure to residual contamination

Answer

Institutional controls such as deed restrictions and land use covenants limit activities that could expose people to residual contamination left in place.

(CSC) Certified Sustainability Consultant Practice Test

(CSC) Certified Sustainability Consultant Practice Test

CSC Remediation & Mitigation Strategies 3