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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>]]. |
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| {| 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> |
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| |-
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| |Benchmark elevation(s) are established nearby
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| |Construction materials have been confirmed to meet design specifications
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| |-
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| |rowspan="4"|'''BMP Excavation and Grading''' - prior to installation of pipes/sewers and backfilling
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| |Excavation location, footprint, depth and slopes are acceptable
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| |-
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| |Excavated soil is stockpiled outside the CDA
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| |-
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| |Embankments/berms (elevations, slopes, compaction) are acceptable
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| |-
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| |Excavation bottom and sides roughened to reduce smearing and compaction
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| |-
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| |rowspan="4"|'''BMP Installation''' – after installation of pipes/sewers, prior to backfilling
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| |Structural components (e.g., foundation, walls) installed according to plans, if applicable
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| |-
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| |Impermeable liner installed correctly, if applicable
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| |-
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| |Installations of sub-drain pipes (e.g., locations, elevations, slopes), standpipes/monitoring wells are acceptable
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| |-
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| |Sub-drain trench dams installed correctly (location, elevation)
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| |-
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| |rowspan="4"|'''Landscaping''' – after final grading, prior to planting
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| |Filter bed depth and surface elevations at inlets are acceptable
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| |-
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| |Maximum surface ponding depth is acceptable
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| |-
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| |Filter bed is free of ruts, local depressions and not overly compacted
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| |-
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| |Planting material meets approved planting plan specifications (plant types and quantities)
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| |-
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| |colspan="3" style="text-align: center;" |'''<u><span title=>Note:''' for Observation Column: S = Satisfactory; U = Unsatisfactory; NA = Not Applicable*</span></u>
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| |- | | |- |
| |} | | |} |
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| ==References== | | ==References== |