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Line 93: − + − + − + − + + + − Additional tests should be conducted at 1.5 metres depth below the proposed bottom elevation of the practice if there is significant variability in soil texture, geology, water table elevation, top of bedrock elevation or bedrock type compared to conditions at the proposed bottom elevation. Excessive testing and disturbance of the site prior to construction is not recommended.<ref>Christopher B. Burke Engineering LLC. (2009). Soil Infiltration Testing Protocol SOIL INFILTRATION TESTING PROTOCOL Purpose of this Protocol Who Should Conduct Testing. Retrieved from https://www.in.gov/ocra/files/Appendix%20F%20-%20Soil%20Infiltration%20Testing%20Protocol.pdf</ref>+
→Sampling
*[[Percolation test]]
*[[Percolation test]]
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*[[Grain size analysis]] (Hazen)
*[[Grain size analysis]] (Hazen method)
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*Single ring infiltrometer
*Single ring infiltrometer
|Double ring infiltrometer test on site, or grain size analysis used <ref>San Francisco Public Utilities Commission. (2017). Determination of Design Infiltration Rates for the Sizing of Infiltration‐based Green Infrastructure Facilities. Retrieved from http://sfwater.org/modules/showdocument.aspx?documentid=9681</ref>
|Double ring infiltrometer test on site, or grain size analysis used <ref>San Francisco Public Utilities Commission. (2017). Determination of Design Infiltration Rates for the Sizing of Infiltration‐based Green Infrastructure Facilities. Retrieved from http://sfwater.org/modules/showdocument.aspx?documentid=9681</ref>
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|Loamy or sandy soil
|Loamy or sandy soil texture
|Clayey soil<ref>CRC for Water Sensitive Cities. (2015). Adoption Guidelines for Stormwater Biofiltration Systems: Appendix C - Guidelines for filter media in stormwater biofiltration systems.</ref>
|Clayey soil texture<ref>CRC for Water Sensitive Cities. (2015). Adoption Guidelines for Stormwater Biofiltration Systems: Appendix C - Guidelines for filter media in stormwater biofiltration systems.</ref>
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|No variation in geologic formation, soil texture or soil bulk density within 1.5 metres below the proposed bottom elevation of the practice.
|Variation in geologic formation, soil texture or soil bulk density within 1.5 metres below the proposed bottom eleation of the practice observed.
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|No nearby sensitive receptors
|No nearby sensitive receptors
|Sensitive receptors in near proximity e.g. buildings, foundations or vulnerable natural heritage features.
|Sensitive receptors in near proximity (e.g. septic systems, building foundations).
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Prior to performing testing and developing a detailed site plan, existing site conditions should be inventoried and mapped including, but not limited to:
Prior to performing testing and developing a detailed site plan, existing site conditions should be inventoried and mapped including, but not limited to:
#Surficial geology and underlying stratigraphy;
#Surficial geology and underlying stratigraphy;
#Watercourses (perennial and intermittent), water bodies, wetlands and floodplains;
#Watercourses (perennial and intermittent), waterbodies, wetlands and floodplains;
#Small headwater drainage features;
#Small headwater drainage features;
#Topography, slope, and drainage patterns;
#Topography, slope, and drainage patterns;
! BMP footprint (m²)
! BMP footprint (m²)
! Test pit
! Test pit
! Bore hole
! Borehole
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| < 50 || 1 || 1
| < 50 || 1 || 1
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|rowspan = 2| 50 – 900 <br> (alternative)|| 1 || 2
|rowspan = 2| 50 – 900 || 1 || 2
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| 2 || 0
| 2 || 0
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|-
| rowspan = 2|> 900 <br> (alternative)|| 1 every 450 m² || 2 every 450 m²
| rowspan = 2|> 900 || 1 every 450 m² || 2 every 450 m²
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|-
| 2 every 450 m² || 0
| 2 every 450 m² || 0
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* Tests must be conducted within 10 m of the infiltration practice footprint area.
* Tests must be conducted within 10 metres of the infiltration practice footprint area.
* Where multiple test are carried out, they should be planned equidistant and mapped accordingly.
* Tests should be performed within 48 hours of a rain event, when the soil is already near, or at field capacity.
* Make a minimum of seven (7) measurements for each test location (i.e., each test pit or borehole).
* Test locations should be spaced equidistant from one another.
* To calculate the median infiltration rate of the native soil, discard the highest and lowest values obtained from each test location (i.e. test pit or borehole) and calculate the median from the remaining measurements.
* Make a minimum of seven (7) measurements (i.e. tests) for each test location (i.e., each test pit or borehole).
* An additional round of tests should be conducted at 1.5 metres depth below the proposed bottom elevation of the practice if there is significant variation in geologic formation, soil texture or bulk density compared to conditions at the proposed bottom elevation.<br>
* To calculate the median infiltration rate of the native soil at the depth tested, discard the highest and lowest values obtained from each test location and calculate the median from the remaining measurements.
'''The recommendations above are guidelines'''
'''The recommendations above are guidelines'''
Keep in mind that excessive testing and disturbance of the site prior to construction is not recommended.<ref>Christopher B. Burke Engineering LLC. (2009). Soil Infiltration Testing Protocol SOIL INFILTRATION TESTING PROTOCOL Purpose of this Protocol Who Should Conduct Testing. Retrieved from https://www.in.gov/ocra/files/Appendix%20F%20-%20Soil%20Infiltration%20Testing%20Protocol.pdf</ref>
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[[Category:Infiltration]]
[[Category:Infiltration]]