Summary of Annual Maintenance Cost Data Collected
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BMP name Number of BMPs Cost per Average cost (💲) Sample standard deviation
Bioretention Basins 8 Water quality volume/ft3 1.25 1.18
Biofiltration Basins 0 Water quality volume/ft3 No data -
Large Wet Detention Basins treating more than 100,000 ft3 4 Water quality volume/ft3 0.07 0.10
Small Detention Basins treating less than 10,000 ft3 0 Water quality volume/ft3 No data -
Constructed Wetlands 0 Water quality volume/ft3 No data -
Infiltration Trenches 8 Water quality volume/ft3 0.39 0.11
Infiltration Basins 6 Water quality volume/ft3 No data
Underground Infiltration 4 Water quality volume/ft3 1.26 2.16
Pervious Pavement 0 Water quality volume/ft3 No data -

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