5402 S 1ST AVE 2022-05-23 - Laserfiche WebLink

No.22(continued)-Maintenance Standards and Procedures for Permeable Pavement. Recommended Frequency. Component Condition when Maintenance is Needed Action Needed P Routine (Standards) (Procedures) Inspection Maintenance Inlets/Outlets/Pipes(cont'd) .. Overflow B Native soil is exposed or other signs of erosion damage are Repair erosion and stabilize surface present at discharge point :Aggregate Storage;Reservoir- Observation port A.S Water remains in the storage aggregate longer than If immediate cause of extended ponding Is not identified,schedule investigation of subsurface materials or other potential anticipated by design after the end of a storm causes of system failure. Vegetation ',. ,, Adjacent large shrubs As needed Vegetation related fallout clogs or will potentially clog voids •Sweep leaf litter and sediment to prevent surface clogging and pending or trees •Prevent large root systems from damaging subsurface structural components Once in May and Vegetation growing beyond facility edge onto sidewalks, Edging and trimming of planted areas to control groundcovers and shrubs from overreaching the sidewalks,paths and street Once in September paths,and street edge edge improves appearance and reduces clogging of permeable pavements by leaf litter,mulch and soil. Leaves,needles,and In fall(October to Accumulation of organic debris and leaf litter Use leaf blower or vacuum to blow or remove leaves,evergreen needles,and debris(i.e.,flowers,blossoms)off of and away organic debris December)after leaf from permeable pavement drop(1-3 times, depending on canopy cover) • 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). e Inspection should occur during storm event. Volume V—Runoff Treatment BMPs—December 2014 4-63