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D. Long Term Maintenance Plan <br />Routine maintenance of the BMPs will be handled primarily by the homeowners (mowing, <br />planting, etc). Street cleaning completed by the City is expected to remove the larger sediments <br />prior to entering the BMPs. Annual maintenance is also required per the City's SWPPP. Long <br />term maintenance needs may include revegetation and removal/replacement of the sand filter. <br />E. Pollutant Reduction <br />These features have the water quantity benefit of decreasing discharge rates and volumes and <br />protecting water quality by decreasing total phosphorus and total suspended solids loads from <br />the approximately 36 acre drainage area. <br />Based on the Minnesota Stormwater Manual for vegetative filters the estimated annual total <br />phosphorus removal is 65-75%. This correlates to a 85% total suspended solids removal <br />annually. For the contributing drainage area this correlates to a reduction in TP of 17 <br />pounds/year and TSS of 6,407 pounds/year. <br />