CES CES Remediation Technologies & Site Cleanup 2

Question 1

What is the purpose of the 'Feasibility Study' (FS) in the CERCLA remediation process?

Accepted Answer

To develop and evaluate alternative remediation approaches against CERCLA's nine evaluation criteria

Answer

The Feasibility Study systematically develops and screens remediation alternatives against CERCLA's nine criteria—including protectiveness, implementability, and cost—to identify the preferred cleanup approach.

Question 2

What does 'treatment train' mean in the context of site remediation?

Accepted Answer

Combining multiple complementary remediation technologies sequentially to address different contaminant conditions

Answer

A treatment train integrates multiple technologies in sequence—such as ISCO to destroy source zone contamination followed by bioremediation to address the dissolved plume—when no single technology achieves cleanup goals.

Question 3

What is 'ex-situ thermal desorption' and how does it treat contaminated soil?

Accepted Answer

Heating excavated soil to temperatures that volatilize organic contaminants, separating them from the soil matrix for off-gas treatment

Answer

Ex-situ thermal desorption excavates contaminated soil and heats it to cause organic contaminants to volatilize and separate from the soil, with the generated vapors collected and treated—operating at lower temperatures than incineration.

Question 4

What is the primary performance metric for evaluating groundwater remediation system effectiveness over time?

Accepted Answer

Contaminant concentration trends in performance monitoring wells

Answer

Declining contaminant concentration trends in monitoring wells are the primary indicator of whether a remediation system is achieving progress toward cleanup goals.

Question 5

What is an 'institutional control' in the context of contaminated site management?

Accepted Answer

Legal or administrative mechanisms that restrict land use or exposure pathways at sites with residual contamination

Answer

Institutional controls are legal and administrative tools (e.g., deed restrictions, environmental easements, groundwater use restrictions) that limit exposure to residual contamination when engineering controls alone cannot achieve unrestricted cleanup levels.

(CES) Certified Environmental Specialist Practice Test

(CES) Certified Environmental Specialist Practice Test

CES CES Remediation Technologies & Site Cleanup 2