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In order to provide adequate capacity for future disposal of solid waste produced by residential and businesses alike in coastal South Carolina area, Horry County developed a plan to expand the Horry County municipal solid waste facility. The facility is a Subtitle “D” Municipal Solid Waste (MSW) landfill, designed and constructed with a composite liner/containment system. The project consisted of clearing & grubbing the 20 acre site, followed by importing fill and clay liner material, installing the geomembrane liner system, and drainage piping and force main.
After WPC completed the Borrow Source Suitability Study, the scope of work included the analysis of soils underlying the excavated area, and the testing of soil and a high density polyethylene membrane liner during the construction of the new landfill cell. Specific tests included the following soil testing:
- Toxicity Characteristic Leaching Procedure
- Specific Gravity of Soil Solids by Water Pycnometer
- Liquid Limit, Plastic Limit, and Plasticity Index of Soils
- Classification of Soils for Geotechnical Engineering Purposes
- Density of Soil and Soil-Aggregate in Place by Nuclear Methods
- Laboratory Determination of Water Content of Soil and Rock by Mass.
- Laboratory Compaction of Soil Using Standard Effort
- Water Content of Soil and Rock in Place by Nuclear Methods
- Particle Size Analysis of Soils
- Permeability of Granular Soils (Constant Head)
- Density and Unit Weight of Soil in Place by the Sand-Cone Method
- Measurement of Hydraulic Conductivity of Saturated Porous Materials Using a Flexible Wall Permeameter
PC provided certification reports for each component of the landfill cell construction documenting that each component met the projects plans and specifications. The reports consist of subgrade and structural fill certification, the clay liner certification and the HDPE Liner Certification.
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