What does an approved hydraulic loading rate of 1.6 gpm/sq. ft. mean for stormwater design?
What does an approved hydraulic loading rate of 1.6 gpm/sq. ft. mean for stormwater design? For FocalPoint® HPMBS, it means 1.6 gallons per minute of treatment flow per square foot of media surface area, subject to the conditions of Washington Ecology’s General Use Level Designation for Basic (TSS) Treatment. For engineers, that rate connects required