6009 FLEMING ST 2021-06-09 - Laserfiche WebLink

Popach Short Plat—2 Lots Table V-4.5.2(22) Maintenance Standards - Permeable Pavement i (continued) Recommended Fre- Condition quency a when Main- Component tenance is Action Needed(Procedures) Inspection Routine Needed Maintenance• (Standards) Aggregate Storage Reservoir Water remains in the storage If immediate cause of extended aggregate ponding is not identified, sched- Observation longer than • A S ule investigation of subsurface port anticipated by materials or other potential design after causes of system failure. the end of a storm Vegetation • . Sweep leaf litter and sed- Vegetation iment to prevent surface related fallout clogging and ponding As needed clogs or will potentially . Prevent large root systems clog voids from damaging subsurface • Adjacent structural components large shrubs Vegetation Edging and trimming of planted or trees growing bey- areas to control groundcovers Once in May and facility and shrubs from overreaching and Once in edge onto the sidewalks, paths and street September sidewalks, edge improves appearance and paths, and reduces clogging of permeable street edge pavements by leaf litter, mulch and soil. In fall (Octo- • ber to Decem- Leaves, ber)after leaf Accumulation Use leaf blower or vacuum to needles, drop (1-3 of organic blow or remove leaves, ever- and organic times, debris and green needles, and debris (i.e., debris depending leaf litter flowers, blossoms)off of and 111/ on canopy away from permeable pavement cover) Note that the inspection and routine maintenance frequencies listed above are recom- • 2014 Stormwater Management Manual for Western Washington Volume V- Chapter4-Page 901 WESTERN ENGINEERS,INC. 36 PROJECT:15-1463-A