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 />• Clogging is usually an issue in the upper 2 to 3 centimeters of aggregate. Remove the upper layer of encrusted <br />sediment, and fines, and/or vegetation from openings and joints between the pavers by mechanical means <br />and/or suction equipment (e.g., pure vacuum sweeper). <br />• Replace aggregate in paver cells, joints, or openings per manufacturer's recommendations <br />• Assess the overall performance of the pavement system during a rain event. If water runs off the pavement <br />and/or there is ponding, then see above. <br />A <br />Sediment present at the surface of the pave - <br />ment <br />• Determine source of sediment loading and evaluate whether or not the source can be reduced/eliminated. If <br />the source cannot be addressed, consider increasing frequency of routine cleaning (e.g., twice per year <br />instead of once per year). <br />• Sidewalks: Use a stiff broom to remove moss in the summer when it is dry <br />Summer <br />Moss growth inhibits infiltration or poses slip <br />safety hazard <br />• Parking lots and roadways: Vacuum sweep or stiff broom/power brush for cleaning moss from pavement sur- <br />face <br />A <br />Paver block missing or damaged <br />Remove individual damaged paver blocks by hand and replace or repair per manufacturer's recommendations <br />A <br />Loss of aggregate material between paver <br />Refill per manufacturer's recommendations for interlocking paver sections <br />blocks <br />A <br />Settlement of surface <br />May require resetting <br />• Remove sediment, debris, trash, vegetation, and other debris deposited onto pavement (rakes and leaf <br />A or B <br />None (routine maintenance) <br />blowers can be used for removing leaves) <br />• Follow equipment manufacturer guidelines for cleaning surface. <br />Aggregate is clogged: Ponding on surface or <br />• Use vacuum truck to remove and replace top course aggregate <br />Ab <br />water flows off the permeable pavement surface <br />during a rain event (does not infiltrate) <br />Replace aggregate in paving grid per manufacturer's recommendations <br />• Remove pins, pry up grid segments, and replace gravel <br />Open -celled paving <br />A <br />Paving grid missing or damaged <br />• Replace grid segments where three or more adjacent rings are broken or damaged <br />grid with gravel <br />• Follow manufacturer guidelines for repairing surface. <br />A <br />Settlement of surface <br />May require resetting <br />A <br />Loss of aggregate material in paving grid <br />Replenish aggregate material by spreading gravel with a rake (gravel level should be maintained at the same level as <br />the plastic rings or no more than 1/4 inch above the top of rings). See manufacturer's recommendations. <br />• Manually remove weeds <br />A <br />Weeds present <br />• Presence of weeds may indicate that too many fines are present (refer to Actions Needed under "Aggregate is <br />clogged" to address this issue) <br />• Remove sediment, debris, trash, vegetation, and other debris deposited onto pavement (rakes and leaf <br />Open -celled paving <br />A or B <br />None (routine maintenance) <br />blowers can be used for removing leaves) <br />grid with grass <br />• Follow equipment manufacturer guidelines for cleaning surface. <br />2019 Stormwater Management Manual for Western Washington <br />Volume V - AppendixA - Page 1027 <br />