municipal solid waste defined in 40 cfr part 258.2 regulated by 40 cfr part 258: rcra subtitle d
TRANSCRIPT
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Municipal Solid Waste
• Defined in 40 CFR Part 258.2
• Regulated by 40 CFR Part 258:
RCRA Subtitle D
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Landfill DiagramSolid Waste
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Liner
Compacted Clay Liner HDPE Liner
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Liner
Purposes• To prevent leachate from seeping into
groundwater• To prevent landfill gas from migrating out
of the landfill below grade
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Liner
Purposes• To prevent leachate from seeping into
groundwater• To prevent landfill gas from migrating out of
the landfill below grade
Typical Materials• 3-foot layer of compacted soil, underlying• 60-mil high density polyethylene (HDPE)
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Leachate Drainage Blanket and Collection System
LeachateDrainage Blanket Collection
Pipes
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Leachate Drainage Blanket and Collection System
Purposes• To enhance the effectiveness of the liner by
minimizing leachate head• To protect the liner from puncture
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Leachate Drainage Blanket and Collection System
Purposes• To enhance the effectiveness of the liner by
minimizing leachate head• To protect the liner from puncture
Typical Materials• Blanket: 1 foot of sand or gravel, underlying• Collection System: HDPE or PVC piping
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Final Cover System
Protective Layer
Vegetation
Low Permeability Layer
FML Liner
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Final Cover System
Composed of:
• Low Permeability Layer
• Protective Layer
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Low Permeability Layer of Final Cover SystemPurposes• To minimize leachate production by
shedding
precipitation rather than allowing it to
percolate through waste
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Low Permeability Layer of Final Cover SystemPurposes• To minimize leachate production by
shedding precipitation rather than allowing it to percolate through waste
• To prevent leachate popouts
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Low Permeability Layer of Final Cover SystemPurposes• To minimize leachate production by shedding
precipitation rather than allowing it to
percolate through waste• To prevent leachate popouts• To provide a barrier (along with the protective
layer) between the waste and receptors
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Low Permeability Layer of Final Cover System
Purposes• To minimize leachate production by shedding
precipitation rather than allowing it to percolate through waste
• To prevent leachate popouts• To provide a barrier (along with the protective
layer) between the waste and receptors• To prevent uncontrolled emission of landfill
gas into atmosphere through top of landfill
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Low Permeability Layer of Final Cover System
Typical Materials• Compacted soil and• 30 or 40-mil polyethylene or PVC flexible
membrane liner (FML)
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Protective Layer of Final Cover SystemPurposes• To protect the low permeability layer from
freeze/thaw, desiccation cracking, root penetration and puncture
• To provide a durable, low maintenance surface
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Protective Layer of Final Cover System
Typical Materials• Uncompacted soil with• Grass on surface
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Gas Monitoring SystemPurposes• To characterize gas production within the
landfill• To detect any methane moving out of the
landfill either below grade or through the final cover system
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Groundwater Monitoring System
GroundwaterMonitoring Well
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Groundwater Monitoring System
Purpose• To detect any groundwater contamination
caused by the landfill
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Surface Water Control System
Purposes• To enhance the effectiveness of the final
cover system in shedding precipitation, and • To prevent surface water contamination
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Landfill Operation• Dry Entombment
Attempt to prevent introduction of water or air to the landfill – Minimal degradation.
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Landfill Operation
• Dry EntombmentAttempt to prevent introduction of water or air to the landfill – Minimal degradation.
• BioreactorAny liquid (other than leachate) is added in a controlled fashion into the waste to accelerate or enhance the anaerobic (without oxygen) biodegradation of the waste.
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Gas Production Graph