Laserfiche WebLink
Table V-A.22: Maintenance Standards - Permeable Pavement (continued) <br />Recommended Frequency a <br />Condition when Maintenance is Needed <br />Component <br />(Standards) <br />Action Needed (Procedures) <br />Inspection <br />Routine Maintenance <br />Vegetation <br />Vegetation related fallout clogs or will potentially <br />• Sweep leaf litter and sediment to prevent surface clogging and ponding <br />Adjacent large <br />As needed <br />clog voids <br />• Prevent large root systems from damaging subsurface structural components <br />shrubs or trees <br />Once in May and Once in <br />Y <br />Vegetation growing beyond facility edge onto <br />9 9 9 Y Y 9 <br />Edging and trimming of planted areas to control roundcovers and shrubs from overreaching the sidewalks, paths and <br />9 9 9 p 9 9 <br />September <br />sidewalks, paths, and street edge <br />street edge improves appearance and reduces clogging of permeable pavements by leaf litter, mulch and soil. <br />Leaves, needles, and <br />In fall (October to December) <br />after leaf drop (1-3 times, <br />Accumulation of organic debris and leaf litter <br />Use leaf blower orvacuum to blow or remove leaves, evergreen needles, and debris (i.e., flowers, blossoms) off of <br />organic debris <br />depending on canopy cover) <br />and away from permeable pavement <br />Note that the inspection and routine maintenance frequencies listed above are recommended by Ecology. They do not supersede or replace the municipal stormwater permit requirements for inspection frequency required of municipal stormwater per- <br />mittees for "stormwater treatment and flow control BMPs/facilities". <br />a Frequency: A= Annually; B= Biannually (twice per year); S = Perform inspections after major storm events (24-hour storm event with a 10-year or greater recurrence interval). <br />b Inspection should occur during storm event. <br />2019 Stormwater Management Manual for Western Washington <br />Volume V - AppendixA - Page 1029 <br />