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

AGENDA Key Activities Completed to Date Closure Plan Summary Implementation: Landfill Closure Works Ministry’s Approval Summary ___ 2

Key Activities Completed to Date  Feb. 2018 - Council’s motion to close the Limerick Landfill  Oct. 2018 - Topographic survey completed ___ 3

Key Activities Completed to Date (Cont’d)  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 ___ 4

Key Activities Completed to Date (Cont’d)  Jan. 2019 - Groundwater, surface water and methane gas sampling completed by Golder ___ 5

Key Activities Completed to Date (Cont’d)  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 ___ 6

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 ___ 7

Closure Plan Summary  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 RECOMMENDATIONS  Landfill closure works Monitoring program   Post-closure inspections and maintenance ___ 8

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 ___ 9

Implementation: Closure Works (Cont’d) 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  Applies to ¾ of the site  Regrade to improve surface water drainage Apply clay cover   Revegetate  Complete stormwater management works  Other minor works ___ 10

Implementation: Closure Works (Cont’d) C O S T E S T I M AT E  $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 ___ 11

Ministry’s Approval Summary R E Q U I R E M E N T S  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 ___ 12

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