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Analysis of temperature and thermal load data from three monitored ponds showed that the bottom area of the infiltration area would need to be up to 7% that of the pond area depending on the infiltration capacity of the native soils.  These areas could be reduced by 40% if the outlet draws water from 0.25 m below the surface, and further reduced for deeper outlets (Van Seters and Dougherty, 2019).<ref>Van Seters, T., Graham, C., Dougherty, J., Jacob-Okor, C., and David, Y. 2019. Data Synthesis and Design Considerations for Stormwater Thermal Mitigation Measures. Sustainable Technologies Evaluation Program. Ontario. https://sustainabletechnologies.ca/app/uploads/2019/04/Thermal-Synthesis-Final.pdf</ref>]].  
Analysis of temperature and thermal load data from three monitored ponds showed that the bottom area of the infiltration area would need to be up to 7% that of the pond area depending on the infiltration capacity of the native soils.  These areas could be reduced by 40% if the outlet draws water from 0.25 m below the surface, and further reduced for deeper outlets (Van Seters and Dougherty, 2019).<ref>Van Seters, T., Graham, C., Dougherty, J., Jacob-Okor, C., and David, Y. 2019. Data Synthesis and Design Considerations for Stormwater Thermal Mitigation Measures. Sustainable Technologies Evaluation Program. Ontario. https://sustainabletechnologies.ca/app/uploads/2019/04/Thermal-Synthesis-Final.pdf</ref>]].  


{| class="wikitable" style="width: 1000px;"
{| class="wikitable" style="width: 1000px;"
|+'''Native Soil Infiltration Rate'''
|+'''Native Soil Infiltration Rate'''
|-
|-
!<br>'''Pond A'''
!<br>
!<br>'''Pond B''<br>
!<br>'''3 mm/h'''<br>
!<br>'''Pond C'''<br>
!<br>'''12mm/h'''<br>
!<br>'''25mm/h'''<br>
|-
|-
|rowspan="6"|'''Site Preparation''' - after site clearing and grading, prior to BMP excavation and grading
|'''Pond A'''<br>
|Natural heritage system and tree protection areas remain fenced off
|4.0%
|
|1.0%
|0.5%
|-
|-
|ESCs protecting BMP layout area are installed properly
|'''Pond B'''<br>
|
|4.7%
|1.2%
|0.6%
|-
|-
|CDA is stabilized or runoff is diverted around BMP layout area
|'''Pond C'''<br>
|
|6.6%
|1.6%
|0.8%
|-
|-
|BMP layout area has been cleared and is staked/delineated
|colspan="4" style="text-align: left;" |'''<u><span title=>Note:''' ''Infiltration system footprint needed to provide pond outflow thermal load reduction benefits equivalent to a 2m bottom draw outlet (expressed as a percent of pond area)''.</span></u>
|
|-
|Benchmark elevation(s) are established nearby
|
|-
|Construction materials have been confirmed to meet design specifications
|
|-
|rowspan="4"|'''BMP Excavation and Grading''' - prior to installation of pipes/sewers and backfilling
|Excavation location, footprint, depth and slopes are acceptable
|
|-
|Excavated soil is stockpiled outside the CDA
|
|-
|Embankments/berms (elevations, slopes, compaction) are acceptable
|
|-
|Excavation bottom and sides roughened to reduce smearing and compaction
|
|-
|rowspan="4"|'''BMP Installation''' – after installation of pipes/sewers, prior to backfilling
|Structural components (e.g., foundation, walls) installed according to plans, if applicable
|
|-
|Impermeable liner installed correctly, if applicable
|
|-
|Installations of sub-drain pipes (e.g., locations, elevations, slopes), standpipes/monitoring wells are acceptable
|
|-
|Sub-drain trench dams installed correctly (location, elevation)
|
|-
|rowspan="4"|'''Landscaping''' – after final grading, prior to planting
|Filter bed depth and surface elevations at inlets are acceptable
|
|-
|Maximum surface ponding depth is acceptable 
|
|-
|Filter bed is free of ruts, local depressions and not overly compacted
|
|-
|Planting material meets approved planting plan specifications (plant types and quantities)
|-
|colspan="3" style="text-align: center;" |'''<u><span title=>Note:''' for Observation Column: S = Satisfactory; U = Unsatisfactory; NA = Not Applicable*</span></u>
|-
|-
|}
|}


==References==
==References==

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