Arkansas Department of Environmental Quality
Hunt, AR
SEMs was contracted to preform the removal of drums that contained polystyrene.
Work performed:
Site Preparation
Clearing and grading of 3 acre mine reclamation site
Construction of gravel road, support area, and bermed areas
Bermed areas included GCL lined soil stockpile area, roll-off storage area, and decontamination area
Construction of a bermed and lined liquid storage tank area
Excavation of the 55’ by 55’ Area of Interest (AOI) to a total depth of 12’ bgs
The AOI was excavated utilizing a 4:1 slope on the west side and a 2:1 slope on the remaining three sides
3,200 cubic yards of soil was excavated and placed in 100 cubic yard piles within the soil stockpile area and sampled for laboratory analysis
All of the soil excavated was classified as suitable for backfill material
51 55-gal drums containing polystyrene were encountered during excavation
Drums were placed in lined roll-off containers, sampled for laboratory analysis, and transported to the appropriate disposal facility
Backfilling activities included transporting and compacting the excavated soil back into the area of excavation in 6 inch lifts
Site grading
Construction of permanent earthen drainage ditch with rock check dams
Hydroseed applied over the 3 acre site
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