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→Overview
*[[Plant lists|Plants]], and
*[[Plant lists|Plants]], and
*A filter bed surface cover layer (e.g. [[mulch]] and [[stone]])
*A filter bed surface cover layer (e.g. [[mulch]] and [[stone]])
*An [[Overflow| overflow outlet]]
*An [[Overflow| overflow outlet]] to safely convey excess flow to a downstream storm sewer or the next BMP in the treatment train.
'''Additional components may include:'''
'''Additional components may include:'''
*An [[underdrain]] to redistribute or remove excess water
*An [[underdrain]] to redistribute or remove excess water
*Underdrain access structures or standpipe ports for periodic inspection and flushing
*A monitoring well installed to the base and screened in the internal water storage reservoir to verify and track drainage performance
*Filter media [[additives]] intended to enhance retention of nutrients, metals, petroleum hydrocarbons and/or bacteria.
*Filter media [[additives]] intended to enhance retention of nutrients, metals, petroleum hydrocarbons and/or bacteria.