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The BMP manual includes minimum design permeability rates for groundwater recharge and infiltration BMPs. Is there a maximum permeability rate?

April 26, 2017BMP design groundwater includes infiltration manual minimum permeability rates recharge

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The BMP manual includes minimum design permeability rates for groundwater recharge and infiltration BMPs. Is there a maximum permeability rate?

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All field permeability tests must utilize half the tested rate for the design of infiltration facilities to provide a safety factor. Furthermore, for any field tested rate of 20 inches per hour or greater, the maximum allowable design soil permeability rate shall be 10 inches per hour in order to ensure basin drawdown within 72 hours.