Limerick Landfill Closure Plan PRESENTED TO: MAYOR AND MEMBERS OF - - PowerPoint PPT Presentation

Limerick Landfill Closure Plan

PRESENTED TO: MAYOR AND MEMBERS OF COUNCIL, MUNICIPALITY OF SOUTHWEST MIDDLESEX PRESENTED BY: FABIANO GONDIM, M.ENG., P.ENG.

May 27, 2020

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AGENDA Key Activities Completed to Date Closure Plan Summary Implementation: Landfill Closure Works Ministry’s Approval Summary

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Key Activities Completed to Date

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• Feb. 2018 - Council’s motion to close the Limerick

Landfill

• Oct. 2018 - Topographic survey completed

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Key Activities Completed to Date (Cont’d)

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• Nov. 2018 – City staff and Golder met with the

Ministry of the Environment, Conservation and Parks (“Ministry”), London District Office to discuss the monitoring program

• Dec. 2018 - Installation of monitoring wells

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Key Activities Completed to Date (Cont’d)

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• Jan. 2019 - Groundwater, surface water and

methane gas sampling completed by Golder

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Key Activities Completed to Date (Cont’d)

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• Jan. 2019 - Water samples were analysed by an

independent laboratory and results sent to Golder

• Jun. 2019 - City staff and Golder met with the Ministry’s

London District Office to discuss monitoring results and status of the closure plan. Mutual collaboration continued

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Key Activities Completed to Date (Cont’d)

• Dec. 2019 - Golder

prepared the Closure Plan and submitted to the Ministry for approval (as required by O.Reg. 232/98)

• May 2020 – Ministry’s

approval

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Closure Plan Summary

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• Report that describes how the site will be closed and

managed after closure

• Detailed description of the surface and subsurface

conditions

• Historical operations
• Assessment of potential impacts to surface water and

groundwater

• Landfill closure works
• Monitoring program
• Post-closure inspections and maintenance

RECOMMENDATIONS

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Implementation: Landfill Closure Works

C U R R E N T C O N D I T I O N S , 6 - H E C TA R E ( 1 5 - A C R E ) P R O P E R T Y

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Implementation: Closure Works (Cont’d)

• Applies to ¾ of the site
• Regrade to improve

surface water drainage

• Apply clay cover
• Revegetate
• Complete stormwater

management works

• Other minor works

P R O P O S E D - O V E R A 4 - H E C TA R E ( 1 0 - A C R E ) A R E A

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Implementation: Closure Works (Cont’d)

• $900,000
• 75 cm (2’6”) thick cover
• The site does not have available soil for cover

construction

• Soil would be imported
• Soil type requirement
• Clay soil to minimize water infiltration, which reduces

the potential for landfill impact to groundwater

C O S T E S T I M AT E

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Ministry’s Approval Summary

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• Requirements for closure works to be

completed within 5 years

• Timing to complete closure works: one

construction season and/or phased approach (Municipality’s discretion)

• Requirements (conditions) consistent

with recent approvals for other ON landfills

• Additional future activities (included in

the Ministry’s approval conditions) such as inspections, signage, staff training, nuisance control

R E Q U I R E M E N T S

Thank you.

Fabiano Gondim Senior Waste Engineer Golder Associates Ltd. fgondim@golder.com 905-567-4444