REMEDIAL ACTION WORK PLAN OPERABLE UNIT 2, LANDFILL ...

● Trucks will transport material to the designated stockpiles at Areas B through F.
● These areas will be brought to ftish grade using dozers and graders.
vegetative cover will come from the stockpile of grubbed material.
Part of the
● Material intended for the vegetative cover will be tested in accordance with
EM200-1 -2 to confirm the material is not contaminated. Contaminated soil will
be placed under the landfill cap.
2.6.4.2 Areas B through F
The procedures for excavation of overburden from Areas B through F, presented in Figure 2-15,
Excavation Plan - Areas B to F, will be as follows:
2.6.5
● Prior to transporting overburden, the perimeter limits of refuse trenches will be
determined using the existing surveys, surface features, and limited exploratory
trenching. Stockpiles will be located outside these units.
● Overburden will be removed from Areas B through F using dozers pushing to the
perimeter limits of the area. In the larger areas, material will be windrowed and
loaded out with front end loaders.
● Overburden removal is the extent of excavation in Areas B through F, and will not
leave less than nine inches of cover over the existing refuse trenches.
Backfill
Backfill activities will be performed in Areas A through F as described in the following sections.
2.6.5.7 Area A
Area A does not require low-permeable landfill cover and will be graded to an elevation of 165
feet after removal of refuse. The methods for backfilling Area A are as follows:
● The 165 Bench and the 180 Bench will be backfdled using material from the 180
Bench and 200 Bench by using dozers, a loader and trucks.
● The backfill material will be placed in loose lifts of 9 to 12 inches and moisture
conditioned.
● The backfdl will be compacted using smooth drum vibratory compactors to 85
percent of the maximum dry density based on standard proctor testing.
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