Specific landfill activities include the following:

• Design and permitting
• Repair, capping and maintenance
• Closure plans
• Investigation of contaminant migration
• Gas sampling
• Development oversight

One of the most important aspects of a closed landfill is the cap. Caps must be maintained in order to prevent erosion and stormwater ponding, which can lead to leaching and migration of contaminants. SES can prevent these types of problems by:

• Installing lined drainage channels
• Routing surface water and subsurface groundwater away from the landfill
• Grading the surface to eliminate depressions and provide positive drainage
• Developing and maintaining a protective cover of vegetation

In association with our landfill work, SES also provides quality earthwork and erosion control through activities that typically include:

 

• Excavation and removal of contaminated soils
• Sediment basin construction
• Dredging
• Slope stabilization
• Riverbank restoration
• Slurry wall construction
• Drainage channel construction
• Backfilling and grading

SES uses both structural and biological methods for erosion control along river or streambanks: structural measures include rock riprap, interlocking concrete blocks, gabions, geosynthetics, or formed concrete; vegetative or biological measures include log bundles anchored to the stream bank, coir fabric, and planting native grasses and shrubs that can form a protective net within the topsoil.

• Kennedy Space Center, Florida:  Over 10,000 cubic yards of petroleum and PCB-contaminated soils were removed from two sites that were crowded with utilities. Remedial activities took place without impacting the Space Shuttle Program's schedule or adjacent buildings.


• Fort Polk Landfill, LOUISIANA:  SES performed repairs and made improvements to the passive methane gas collection system and clay cap. Over 3,500 cubic yards of topsoil were added and re-graded to cover low spots and provide positive drainage, one gas vent was installed in the gas collection media three feet under the landfill cap, and disturbec areas of the landfill were hydroseeded to encourage vegetation growth.


• Tennessee River:. Restored 4,000 linear feet of shoreline, incorporating erosion silt booms, 19,000 cubic yards of riprap, geotextile fabruc, drainage pipes, seeding, fertilizing and planting of over 400 seedlings.