HomeMy WebLinkAboutLandfill FireLandfill Fire Upd
Fire Date: May 26, 2012
Report Date: August 21, 20'
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SELECT
WASTE
`.12 " -36" TIRE DERIVED AGGREGAT
DRAINAGE LAYER
GEONET /GEOTEXTILE COMPOSITE
.... - . - - . - - - _ ; ; 60 MIL HDPE GEOMEMBRANE . ......... . . ........:.. . ......
TYPICAL LINER SECTION
SCALE: NO SCALE
>> = Q •fit*
1. Groundwater Underdrain Lift Station
2. Cell Reconstruction
Jon Scharf, P. E.
HR Green, Inc.
HRGreen
Groundwater Drainage System
• Located beneath liner
• Upward GW gradient
• Piping network — 5 outlets
• Purpose
- Compliance with IAC
- Separation of GW from waste
- Monitoring
-36" TIRE DERIVED AGGREGA
DRAINAGE LAYER
\\\ \ \ \ \ \ \ \�\GEONET /GEOTEXTILE COMPOSITE \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\
MIL HDPE GEOMEMBRANE ;;;;;.r.ii'rii: ii.r.r...}.iii':.
4' COMPACTED CLAY
GRANULAR DRAINAGE LAYER
TYPICAL LINER SECTION
SCALE: NO SCALE
HRGreen
Potential Liner Breach
• VOC contamination of
underdrains noticed during
emergency fire remediation
activities.
• Underdrain water is currently
being collected and hauled to
leachate system daily.
' -36" TIRE DERIVED AGGREGA
DRAINAGE LAYER
�GEONET /GEOTEXTILE COMPOSITE
MIL HDPE GEOMEMBRANE
4' COMPACTED CLAY
GRANULAR DRAINAGE LAYER
TYPICAL LINER SECTION
SCALE: NO SCALE
HRGreen
Groundwater Under -Drain Lift Station
Drain
Ne Lift
GROUNDWATER SAMPLING SUMPS'`;\
AND PIPE CLEANOUT ASSEMBLY.
LIFT STATION \
FORCE MAIN.
FORCE MAIN -�
�\ CONNECTED TO
on�
I FY09 . IAC requires contaminated
i
o under -drain discharge to
\ �\ be managed as leachate.
New lift station will provide
�. permanent control of
under -drain discharge
ach .e
in Line
HRGreen
Reconstruction of Cell FY09
Cell FY09
Original Footprint: 14x7 �c
96
Issues for Evaluation
• Reconstruct to
original size?
• Reconstruct using
similar materials?
HRGreen
Extent of Reconstruction
I F
On IF
(s..
L1.
�0:
Options Being Evaluated
• Complete reconstruction
9.4 acres in 2013
• Staged reconstruction
2.2 acres in 2013
• Staged reconstruction
5.4 acres in 2013
Primary Issues
• Timing / need for landfill capacity
• Impact on landfill operations
• Time to cover open cell with
waste
• Cost
HRGreen
Construction Materials
Leachate Collection Layer
Aggregate Options
• Tire Derived Aggregate (TDA)
• Sand
• Gravel (River Rock)
• Crushed Quartzite
HRGreen
Leachate Collection / Liner Protection Layer
Evaluation Criteria
Meets industry standard and passes + + + +
regulatory scrutiny
Acceptable liner protection + + H H
Permeable + H + +
Stable on slopes + H + +
Non - combustible H + + +
Cost + - - -
+ Ranks high for this characteristic
Ranks low for this characteristic
( -) Ranks low but mitigation options are available
HRGreen
Remaining Work
• Cleanup of Fire Debris
• In -house staff and rented equipment — in progress
• Expect to complete in early October
• Approximate cost: $200,000
• Lift Station for Under Drain System
• Setting public hearing at tonight's council meeting
• Estimated construction cost: $120,000 plus $20k for electrical service
Reconstruction of Liner System
Contract for Design, bidding and inspection services on tonight's agenda
Construction in 2013
Preliminary construction cost estimate: $3.5M (for full cell)