covered landfill

But a covered landfill's tough turf does not attract enough birds and insects to disperse seeds.

"All containment structures around coal combustion waste surface impoundments should be examined immediately to ensure their structural stability, and contained wastes should be transferred to lined and consistently covered landfills located outside of flood plains.

The plant exposure route was not included because it is assumed that vegetation root growth on the covered landfill will not exceed the depth of the soil covering the PCB contaminated materials and therefore uptake of PCB into plants will not occur.