Your question: Why must the groundwater in the areas surrounding the landfill be monitored?

Why is it important to monitor the groundwater around a landfill?

Testing groundwater may reveal the potential source of contamination, for instance a leaking underground storage tank, a ruptured pipe or fractured well casing. Testing can determine if groundwater constituents are above or below federal safe drinking water standards.

Why are landfills monitored?

Modern landfills are well-engineered and managed facilities for the disposal of solid waste. Landfills are located, designed, operated and monitored to ensure compliance with federal regulations. They are also designed to protect the environment from contaminants, which may be present in the waste stream.

How do landfills impact groundwater?

Groundwater moves slowly and continuously through the open spaces in soil and rock. If a landfill contaminates groundwater, a plume of contamination will occur. Wells in that plume will be contaminated, but other wells, even those close to the landfill, may be unaffected if they are not in the plume.

How is groundwater supposed to be protected from landfills?

Fortunately, modern landfills have many safeguards to protect groundwater. New landfills are required to have clay and synthetic liners as well as leachate collection systems. … Capping reduces the amount of leachate, as rain and snow melt no longer infiltrate the waste.

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Why is aquifer depth important for a landfill?

The risk of groundwater contamination by any leachate that is not caught by collection systems is determined by the following factors: Depth of the water table. If the water table is low (far below the ground surface), water will become partially filtered as it percolates downward through the soil.

What is groundwater monitoring?

The monitoring well network is an early warning system designed to detect contamination as it enters the ground water system. This allows us to identify the sources of the contamination and possibly design and implement Best Management Practices (BMPs) to prevent contamination.

How is landfill monitored?

Techniques for the monitoring of landfill gas

Surface monitoring is used to check the integrity of caps on waste and check on borehole monitoring. … Gas probes, also known as perimeter or migration probes, are used for subsurface monitoring and detect gas concentrations in the local environment around the probe.

How do you monitor landfill gas?

A common method of near surface gas monitoring is the use of a portable instrument such as a organic vapor analyzer-flame ionization detector (OVA/FID). Normally, the instrument is calibrated for methane but it can be calibrated for other gases commonly found in landfills.

Why is it important to try to keep water out of a landfill?

Storm Water Drainage

It is important to keep the landfill as dry as possible to reduce the amount of leachate. This can be done in two ways: Exclude liquids from the solid waste. … If no liquid comes through the sample after 10 minutes, then the trash is accepted into the landfill.

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How do landfills reduces the chance of leachate affecting the groundwater?

Covering the waste with soil consumes a significant volume of cell capacity. … The landfill cells is lined with 2 polyethylene layers and compacted clay layer to prevent or to minimize the leachate percolation to the groundwater through decreasing the permeability coefficient to 1 × 107 cm/s.

What happens when the leachate created in a landfill gets into streams groundwater or soil?

Once leachate is formed and is released to the groundwater environment, it will migrate downward through the unsaturated zone until it eventually reaches the saturated zone . … Monitoring wells at landfills allow scientists to determine whether contaminants in leachate are escaping into the local groundwater system.