Environmental Reclamation Standards Flashcards

What is the standard minimum liability period for revegetation success in areas of 26 inches or more annual precipitation under SMCRA?

Answer: 5 years

SMCRA requires a minimum 5-year liability period for revegetation success in areas receiving 26 or more inches of average annual precipitation.

Under 30 CFR Part 816, what is required regarding topsoil removal and storage during surface mining?

Answer: Topsoil must be separately removed, segregated, and stockpiled for later redistribution

Regulations require that topsoil be separately removed and stored to preserve its productivity for redistribution over regraded areas during final reclamation.

What is 'acid mine drainage' (AMD) and what geochemical process causes it?

Answer: Acidic water produced when sulfide minerals oxidize upon exposure to air and water

AMD occurs when sulfide minerals like pyrite oxidize upon exposure to oxygen and water, producing sulfuric acid that can leach heavy metals from surrounding rock.

Which reclamation technique is most effective for preventing acid mine drainage from waste rock piles?

Answer: Encapsulation of acid-generating material with a low-permeability cover

Encapsulating acid-generating sulfide-bearing waste with a low-permeability cover limits oxygen and water infiltration, preventing the oxidation reactions that produce AMD.

When reclaiming prime farmland under SMCRA, what must be demonstrated before bond release?

Answer: That soil productivity equals or exceeds that of the pre-mining condition

SMCRA requires that reclaimed prime farmland achieve equivalent or greater soil productivity compared to pre-mining conditions before bonds can be released.

A 'contemporaneous reclamation' requirement under SMCRA means that operators must:

Answer: Reclaim mined areas as quickly as practicable as mining progresses

Contemporaneous reclamation requires operators to reclaim disturbed areas as mining progresses, minimizing the total area disturbed at any one time.

Which regulatory standard governs effluent limitations for water discharges from surface coal mining operations?

Answer: EPA effluent limitation guidelines for coal mining (40 CFR Part 434)

EPA's effluent limitation guidelines at 40 CFR Part 434 establish technology-based discharge limits for pH, total suspended solids, iron, and manganese from coal mining operations.