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*Existing data from borehole, well and geophysical testing; and
*Existing data from borehole, well and geophysical testing; and
*Proposed location of development features (buildings, roads, utilities, etc.).
*Proposed location of development features (buildings, roads, utilities, etc.).
==Safety correction==
The measured or calculated infiltration rate must be divided by a value 2 or 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><ref>CRC for Water Sensitive Cities. (2015). Adoption Guidelines for Stormwater Biofiltration Systems: Appendix C - Guidelines for filter media in stormwater biofiltration systems.</ref>.
{| class="wikitable"
|+ Selecting a safety factor
|-
! 2
! 3
|-
|Catchment < 100 m²<ref>Ballard, B. W., Wilson, S., Udale-Clarke, H., Illman, S., Scott, T., Ashley, R., & Kellagher, R. (2015). The SuDS Manual. London.</ref>
|Catchment > 100 m²
|-
|