Capping and Sealing
nounPronunciation: /ˈkæpɪŋ ənd ˈsilɪŋ/
The installation of impermeable or low-permeability layers over contaminated materials to prevent water infiltration, limit exposure to hazardous substances, and reduce atmospheric emissions from mine waste. Common cap materials include clay, geosynthetic liners, and concrete.
Plain English
Covering contaminated mine materials with impermeable layers to prevent water and air from contacting hazardous substances.
Etymology & History
Usage
"The reclamation plan included capping and sealing the reactive mine waste with a two-foot clay layer topped with vegetated soil."
Style guide notes: Always mention specific cap composition, thickness, and maintenance requirements; distinguish from dust control or stabilization alone.
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Related Terms
Frequently Asked Questions
What materials are used for caps?
Clay, geosynthetic membranes, concrete, asphalt, compacted soil layers, and combinations providing required impermeability.
Why is vegetative cover added?
Plants stabilize the cap, prevent erosion, reduce infiltration, improve aesthetics, and support ecosystem restoration.
Why Test Candidates on This?
Capping and sealing are fundamental containment strategies essential for controlling contaminant exposure and long-term site management.
Required skill level: Mid