Utilizing Alternative Caps that meet Subtitle D Equivalency Requirements for CCP Landfill and Impoundment Closures to Gain Significant Savings and Secondary Use Opportunities

摘要

Recent developments in alternative cap designs for landfills and impoundments have proven to meet regulatory requirements,significantly lower capital costs and long-term maintenance costs plus they can provide beneficial secondary use opportunities such as a solar energy generation facility.Alternative closure caps are a practical approach to traditional Subtitle D/CCR Rule prescriptive methods and like a modern roofing system which utilizes composite shingles,alternative caps can be deployed on very shallow and steep slopes with rainwater collected in perimeter channels so as to create a system on which rainwater efficiently drains off the cap.For large impoundments,alternative caps can prove highly valuable because large quantities of soils are not required to develop the necessary slopes to avoid saturated soils conditions and/or ponding on the cap liner.Also for alternate capping of lagoons,grading can be accomplished to develop sump areas within the cap to collect storm water and drain it from the cap.