Public Information Session Community Government of Behchoko Type A Water Licence Application November 10, 2014
Purpose of Presentation • Community Government of Behchoko is applying to the Wekweèzhiì Land and Water Board for a Type A Water Licence • Current Water Licence is set to expire in November 2014 • Presentation intended to inform community members of the facilities and activities covered under the pending Water Licence
Proposed New Type A Water Licence Chronology Summer Summer Spring September October November 2014 2013 2014 2014 2014 2014 New Application Old Water Technical Session Final Review WLWB waives Landfill Made to Licence expires and Information comments Public Assessment WLWB and anticipate Requests WLWB meeting Hearing, & Design new Water Anticipate Issue however Licence to be of draft Water requires granted Licence Public Information Session
Items and Facilities Covered Under the proposed Type A Water Licence • Rae Waste Water Treatment Facility (Lagoon & Collection) • Edzo Water Water Treatment Facility (Lagoon & Collection) • Rae Water Intake and Treatment Plant • Edzo Water Intake and Treatment Plant • Solid Waste Management Facility (closure of existing landfill and development of adjacent site) • Spill Contingency Plans • Hazardous Waste Handling • Surveillance Network Program (SNP)
Facilities Subject to Water licence Overview
Rae WWTF location
Rae WWTF Operations Piped to Transfer Residential Storage Station Tanks Vacuum Truck Cell 1: 54,750 m 3 Emergency Overflow June/October via Gate Valve Weir #1 Cell 2: 54,800 m 3 June/October via Gate Emergency Overflow Valve #2 Weir Wetland/Frank Channel
Rae WWTF – Adjustments to SNP Locations
EDZO WWTF Location
Edzo WWTF Operations Lift Station Control Box Cell 1: 1,790 m 3 Cell 2: 1,790 m 3 4 x 20m Dredged Channel 2.1 ha Wetland
Proposed New Solid Waste Facility - History 2006 Study – Dillon Assessed 3 sites for suitability as landfills • Site 1 – Area off access road to Rae • Site 2 – Area off Russel Lake access road • Site 3 – Quarries off Hwy #3 Site 2 was considered the most favourable, however it was recommended that further investigation be completed considering other locations that may be more suitable
Proposed New Solid Waste Facility - History 2009 Study – Aboriginal Engineering Ltd. (AEL) Assessed 5 sites for suitability as landfills • Site 1 – Area off old access road to Rae • Site 2 – Area off Hwy #3 • Site 3 – Tower Hill Quarry site • Site 4 – Quarry site • Site 5 – Existing Landfill Site 2 was selected as the best location and was recommended for construction of a new solid waste facility
Proposed New Solid Waste Facility – Location
Surface Water Flow and Drainage
Proposed New Solid Waste Facility – Site Characterization Geology • The proposed site is characterized by deposits of sands, silts and clays overlain by an organic layer, interspersed with areas of bedrock outcropping. • Overburden thickness at the proposed site ranges from 0.3 m to greater than 2.0 m. • Permafrost was encountered in 8 of 9 test pits and ranged in depth from 0.55 m to 2.0 m • Site not favourable for trench style landfilling
Proposed New Solid Waste Facility – Planning Criteria Assessment
Proposed New Solid Waste Facility – Planning Criteria Assessment
Proposed New Solid Waste Facility – Design 20 year planning horizon requires ~105,000 m 3 of total • compacted waste volume (1.5kg/person/day @ compaction rate of 300 kg/m 3 ) • Proposed site footprint is 245 m * 80 m • Based elevation of site is 160.5 masl with a maximum elevation of 167.5 masl (limits visibility from road)
Proposed New Landfill Footprint
Proposed New Solid Waste Facility – Design Site preparation will require: • Land clearing/grubbing • Cut/fill to maintain consistent base elevation • Berm construction • Granular pad construction
Landfill Design – Site Preparation
Proposed New Solid Waste Facility – Filling Plan Proposed that Site be filled using the lift method • Landfill constructed out of cells (blocks) laid out in strips, lifts and phases. • Width of strips and height of lifts subject to dimensions of active face.
Lift Landfill Components CELLS ACTIVE FACE PHASE 1 FOOTPRINT PHASE 2 FOOTPRINT
Landfill Design – Lift and Phase Approach
Landfill Design – Cross Sections
Proposed New Solid Waste Facility – Opportunities for Extended Life A substantial extension of the life of the landfill may be achieved through the implementation of landfill compaction. This would require a capital investment to acquire suitable machinery, however could substantially increase the site life of the facility.
Closure and Reclamation Plan Existing Site
Closure and Reclamation Plan Existing Site
Closure and Reclamation Plan Existing Site
Closure and Reclamation Plan Existing Site
Closure and Reclamation Plan Existing Site
Existing Landfarm - History Chronology 2009 2013 2004 2014 Landfarm AEL Study and WESA/TEES Depth constructed to partial engaged for delineation and manage PHC rehabilitation feasibility monitoring – impacted soil study of leading to landfarm rehabilitation
Existing Land Farm Assessment
Existing Land Farm Assessment
Existing Landfarm– Feasibility Study Recommendations 1. Material thickness should be decreased to a maximum of 0.5 m to promote volatilization of hydrocarbons. This can be achieved by expanding the land farm footprint, or removing soil that is compliant with the applicable regulations (could be used as cover for the disposal site). 2. The land farm liner should be reconstructed or replaced with an impermeable geosynthetic liner to prevent seepage of PHCs into clean soil below and into the groundwater table. 3. Additional soil delineation below the land farm should be undertaken to assess the extent of deeper impacts. 4. Installation of monitoring wells should be conducted to assess impacts to groundwater. 5. Monthly aeration of impacted soil should be conducted during the snow-free months using the equipment (allu bucket) already available to the public works department. 6. Annual monitoring of PHCs, nutrients and microbial colonies in the treatment area should be conducted at the start of the treatment season and at the end to assess the progress of remediation .
Spill Contingency Plans and Hazardous Waste Management • Details
SNP Program • Details on frequency • Image of SNP locations and purpose
QUESTIONS ?
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