2122 106TH ST SW 2025-03-12 - Laserfiche WebLink

Permeable pavers • ICPI recommends cleaning if the measured infiltration rate falls below 10 in/hr. Use sweeping with suction when surface and debris are dry 1-2 times annually (see next bullet for exception). Apply vacuum to a paver test section and adjust settings to remove all visible sediment without excess uptake of aggregate from paver openings or joints. If necessary replace No 8, 89 or 9 stone to specified depth within the paver openings. Washing or power washing should not be used to remove debris and sediment in the openings between the pavers (Smith, 2000). • For badly clogged installations, wet the surface and vacuumed aggregate to a depth that removes all visible fine sediment and replace with clean aggregate. • If necessary use No 8, 89 or 9 stone for winter traction rather than sand (sand will accelerate clogging). • Pavers can be removed individually and replaced when utility work is complete. • Replace broken pavers as necessary to prevent structural instability in the surface. • The structure of the top edge of the paver blocks reduces chipping from snowplows. For additional protection, skids on the corner of plow blades are recommended. • For a model maintenance agreement see "Permeable Interlocking Concrete Pavements" (Smith, 2011). Plastic or Concrete grid systems • Remove and replace top course aggregate if clogged with sediment or contaminated (vacuum trucks for stormwater collection basins can be used to remove aggregate). • Remove and replace grid segments where three or more adjacent rings are broken or damaged. • Replenish aggregate material in grid as needed. • Snowplows should use skids to elevate blades slightly above the gravel surface to prevent loss of top course aggregate and damage to plastic grid. • For grass installations, use normal turf maintenance procedures except do not aerate. Use very slow release fertilizers if needed. Volume V — Runoff Treatment BMPs — December 2014 5-26