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;Fines
;Fines
:Soil materials with less than a 0.050 mm diameter particle size.
:Soil particles with a diameter less than a 0.050 mm.
;First flush: Initial pulse of stormwater runoff which picks up the pollutants that have settled on surfaces during the dry period. The first flush contains the highest pollutant concentrations.
;First flush: Initial pulse of stormwater runoff which picks up the pollutants that have settled on surfaces during the dry period. The first flush contains the highest pollutant concentrations.