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Line 90: − * Additional tests should be conducted if local conditions indicate significant variability in soil types, geology, water table levels, depth and type of bedrock, topography, etc.+ − * Similarly, uniform site conditions may indicate that fewer test pits are required. 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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*[[Permeameter]]
*[[Permeameter]]
*Double ring infiltrometer
*[[Double ring infiltrometer]]
*Cased borehole ([[percolation test]])
*[[Percolation test]]
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*[[Grain size analysis]] (Hazen)
*[[Grain size analysis]] (Hazen)
*Soil textural classification
*Soil textural classification
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==Becoming familiar with the different measurement practices==
STEP have produced a free online module to provide some basic information on infiltration test methods. Register [https://sustainabletechnologies.ca/events/design-infiltration-rate-e-learning-course/ '''HERE''']
==Safety correction==
==Safety correction==
The measured or calculated infiltration rate must be divided by a value between 2 and 3 before use in design<ref>Design criteria for infiltration. (2018, February 14). Minnesota Stormwater Manual, . Retrieved 00:16, March 14, 2018 from https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_infiltration&oldid=35583.</ref>
The measured or calculated infiltration rate must be divided by a value between 2 and 3 before use in design<ref>Design criteria for infiltration. (2018, February 14). Minnesota Stormwater Manual, . Retrieved 00:16, March 14, 2018 from https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_infiltration&oldid=35583.</ref>
==Planning for testing==
==Planning for testing==
===Background Evaluation===
===Background Evaluation===
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:
===Sampling===
===Sampling===
[[File:Test_pit.jpg|thumb|Infiltration testing should be carried out at relevant stages down through the profile of a test pit.]]
The number of test pits or soil borings varies depending on site conditions and the proposed development plan. General guidelines are as follows:
The number of test pits or soil borings varies depending on site conditions and the proposed development plan. General guidelines are as follows:
* Where multiple test are carried out, they should be planned equidistant and mapped accordingly.
* Where multiple test are carried out, they should be planned equidistant and mapped accordingly.
'''The recommendations above are guidelines'''
'''The recommendations above are guidelines'''
Additional tests should be conducted if local conditions indicate significant variability in soil types, geology, water table levels, depth and type of bedrock, topography, etc. Similarly, uniform site conditions may indicate that fewer test pits are required. 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]]