Malroz canada closedLandfills

Strategies for Mitigation of Environmental Impacts from a Closed Municipal Landfill : Strategies for Mitigation of Environmental Impacts from a Closed Municipal Landfill Steven Rose1, Paul MacLatchy2, Greg Bickerton3, Dale VanStempvoort3 NATO - CCMS Pilot Study Meeting Cardiff, Wales May 23-26, 2004


Outline : Outline Site Location / Setting / History Site Characterization andamp; Contaminants Current Site Management / Long-Term Objectives Feasibility Studies Complementary Studies


Site Location : * SoftMap Technologies Inc., Topo 50, Southern Ontario Site Location


Slide4 : courtesy of City of Kingston


Slide5 : 1953


Site Characterization : Elevation (m) Cover Waste Peat Clay / Silt Water Level 95 90 85 80 75 70 Site Characterization


River Elevations (masl) : River Elevations (masl)


Slide8 : Groundwater Flow


Slide9 :


Site Chemistry ~ 540 Samples : Site Chemistry ~ 540 Samples Contaminants of Concern Iron Ammonia


Current Site Management : Current Site Management Weekly Site Observation Visits Periodic Sampling Active Groundwater Pumping


Groundwater Pumping : Groundwater Pumping


Groundwater Extraction : Groundwater Extraction active seepage management labour intensive water taking by permit costly


Long-Term Management Objectives : Long-Term Management Objectives maintain site use less active (more passive) site management mitigated environmental impacts regulatory compliance public acceptance


Feasibility Studies : Feasibility Studies OTHER STUDIES benthic / sediment studies long-term options review independent investigations


Phreatophyte Tree Plots : Phreatophyte Tree Plots Salix nigra (black willows) Populus balsamifera (balsam poplars) hydraulic control of shallow groundwater native species willows already on-site


Phreatophyte Tree Plots : Phreatophyte Tree Plots west stream Black Willow Balsam Poplar


Phreatophytes - Challenges & Stressors : Phreatophytes - Challenges andamp; Stressors Weather Shoot Blight Caterpillars Vandalism


Constructed Wetland : Constructed Wetland shallow fringe wetland in-water construction 2 - 35 m x 35 m cells cattails vegetation


Constructed Wetland – Schematic Section : Substrate Mattresses Diffuser Silt Barrier Constructed Wetland – Schematic Section Landfill


Constructed Wetland - Monitoring : Constructed Wetland - Monitoring Quarterly sampling surface water substrate groundwater Chemical Analyses nitrogen iron indicators


Constructed Wetland – First Season Growth : Constructed Wetland – First Season Growth little growth before late July cattails (from seeds andamp; rhizomes) grasses, sedges, rushes populated by birds, fish, amphibians


Environment Canada Test Site : Environment Canada Test Site


Sap Flow Probes : Sap Flow Probes


Monitoring Well with LeveLogger : Monitoring Well with LeveLogger


Sap Flow & Vapour Pressure Deficit : Sap Flow VPD Sap Flow andamp; Vapour Pressure Deficit


Water Level Fluctuations : 1 m from tree 11 m from tree Water Level Fluctuations


Future Work : Future Work Continued Evaluation of Feasibility Technologies Assessment of Near Shore Impacts Evaluation of Long-term Management Options Public Consultation


Additional Information : Additional Information www.cityofkingston.ca/ residents/ environment/ bellepark/ index.asp Steven Rose, P.Eng. Malroz Engineering Inc. rose@malroz.com