Highland Dr. North Sites

Highland Landfill

The Highland Drive Landfill Area is comprised of three remediation sites (from west to east): the Highland Drive Landfill, the Pine Street North Extension Roadbed and the Pine Street North Extension Consolidation Site. Because of the contiguous nature of the sites, cleanup within the Highland Drive Landfill Area will be conducted as a single integrated activity.

Highland Drive Landfill

  • The Highland Drive Landfill houses 51,900 m3 of LLRW co-mingled or overlain by municipal solid waste (MSW)
  • Operated as a municipal landfill accepting waste from the mid to late 1940s until closed in 1991
  • The site also received LLRW that became co-mingled with MSW
  • Closed facility remains under the ownership and management of the County of Northumberland

 

Remediation/Restoration Plans

  • The excavation of the non-contaminated MSW
  • When the non-contaminated MSW has been removed, excavation of the LLRW situated above the groundwater table will begin
  • Clean cover material above the HDPE geomembrane will be removed and stockpiled for reuse as backfill or daily cover
  • To the extent possible, MSW unaffected by LLRW will be segregated and returned to the landfill but it is anticipated that some amount of organic refuse will be directed to the LTWMF

 

Special Considerations

  • Cell 3 will be designated for containment of co-mingled LLRW/soil/MSW from the Highland Drive Landfill and will include a methane attenuation layer to mitigate potential odour associated with the MSW

Pine Street North Extension Temporary Storage Site

  • 6,800 m3 historic LLRW generated from on-going clean-up activities
  • Pad 1 constructed as part of the 1988 Port Hope Remedial Program to temporarily store LLRW
  • Pad 2 constructed in 2003 when TSS Pad 1 was nearing capacity
  • Since all waste material has been placed on an engineered pad or within the Quonset building and has not been in contact with the underlying native soil, the soil conditions at this site are not considered as part of the site remediation.
  • The material stored on both TSS Pads consists of mixed soils including contaminated soils, building debris, tree stumps and other construction wastes

 

Remediation/Restoration Plans

  • Fencing installed to secure site
  • Waste will be transported by truck to the LTWMF along North Transportation Route
  • The restoration will reinstate the site to conditions existing prior to construction with affected area surfaced with topsoil to support re-vegetation

Pine Street North Extension Roadbed

  • Approximately 7,200 m3 of LLRW from internal roadway
  • Contains fill with abundant debris, generally contiguous with east extent of Highland Drive Landfill

 

Remediation/Restoration Plans

  • Replacement of clean imported backfill with the access road reinstated

 

Special Considerations

  • Where contamination extends onto residential properties, a variety of landscaping materials and surface features may be encountered. The goal is the removal of contaminated soil with as little disruption to the property as possible
  • For established trees within a contaminated area that pre-date the placement of the waste, care will be taken to avoid damage to the root system of the tree

 

March 29, 2018