CGM Remediation & Mitigation Strategies 3

Question 1

Phytoremediation using sunflowers (Helianthus annuus) is particularly effective for which soil contaminant?

Accepted Answer

Heavy metals including lead and uranium

Answer

Sunflowers are hyperaccumulators proven effective at extracting heavy metals such as lead, cesium, and uranium from contaminated soils.

Question 2

What is the purpose of a 'French drain' as a site mitigation strategy?

Accepted Answer

To redirect subsurface water away from problem areas

Answer

A French drain uses a perforated pipe in a gravel-filled trench to intercept and redirect subsurface water, mitigating waterlogging and drainage problems.

Question 3

A grounds manager is tasked with remediating a pesticide spill on turf. Which action should be taken FIRST?

Accepted Answer

Contain the spill to prevent further spread

Answer

Containing the spill immediately prevents further environmental spread and limits the total area requiring remediation.

Question 4

Which soil amendment is most commonly used to immobilize heavy metal contaminants through pH adjustment?

Accepted Answer

Agricultural lime

Answer

Agricultural lime raises soil pH, causing many heavy metals to precipitate into less soluble, less bioavailable forms in the soil matrix.

Question 5

What is 'in-situ chemical oxidation' (ISCO) used for in site remediation?

Accepted Answer

Injecting oxidants into soil or groundwater to destroy organic contaminants

Answer

ISCO involves injecting powerful oxidants such as permanganate or persulfate directly into contaminated zones to chemically destroy organic contaminants.

(CGM) Certified Grounds Manager Practice Test

(CGM) Certified Grounds Manager Practice Test

CGM Remediation & Mitigation Strategies 3