Delaware’s venture into modern landfills.

Delaware’s venture into modern landfills.

N. C. Vasuki, P.E., DEECEO, Delaware Solid Waste Authority

www.dswa.com

N. C. Vasuki, P.E., DEECEO, Delaware Solid Waste Authority

www.dswa.com

IntroductionIntroduction■ Landfills provide the foundation for the State’s

solid waste management program■ In 1980 the first geomembrane (30 mil pvc) lined

landfill cell (9 acres) was constructed■ In 1982, a second cell (18 acres) was added.■ Leachate treatment became an issue.■ Dr. Fred Pohland’s research at Georgia Tech

appeared to provide a solution for our problem.■ Attempts were made to introduce leachate into

both cells.

■ Landfills provide the foundation for the State’s solid waste management program

■ In 1980 the first geomembrane (30 mil pvc) lined landfill cell (9 acres) was constructed

■ In 1982, a second cell (18 acres) was added.■ Leachate treatment became an issue.■ Dr. Fred Pohland’s research at Georgia Tech

appeared to provide a solution for our problem.■ Attempts were made to introduce leachate into

both cells.

Leachate recirculationLeachate recirculation■ Absence of prescriptive regulations allowed us

to experiment with various methods.■ Vertical recharge wells (perforated concrete

manhole sections) appeared to work.■ More wells were added and leachate export for

external treatment was reduced.■ Gas production also increased. Based on the

experience gained, we started improving our design.

■ Absence of prescriptive regulations allowed us to experiment with various methods.

■ Vertical recharge wells (perforated concrete manhole sections) appeared to work.

■ More wells were added and leachate export for external treatment was reduced.

■ Gas production also increased. Based on the experience gained, we started improving our design.

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Property Boundary

Shallow Pleistocene

Pleistocene

Frederica Aquifer

Cheswold Aquifer

Gas Migration Monitoring Well

Water Supply Well

Irrigation Well

Surfacewater Sampling Point

Single Leachate Sampling Point

Duel Primary Leachate/Secondary

Detection Liquid Monitoring Point

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LEGEND

Fig. 4: Sandtown Landfill - Locations of Groundwater, Leachate, and Surfacewater Monitoring Points

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Area C-D