8525 EVERGREEN WAY BURGER KING 2021-05-10

No.22(continued)-Maintenance Standards and Procedures for Permeable Pavement. Recommended Frequency a Component Condition when Maintenance is Needed Action Needed Inspection Routine (Standards) (Procedures) Maintenance Surface/Wearing Course(coned) Interlocking concrete A or B None(routine maintenance) Clean pavement surface using one or a combination of the following methods: paver blocks and • Remove sediment,debris,trash,vegetation,and other debris deposited onto pavement(rakes and leaf blowers can be used aggregate pavers for removing leaves) •Vacuum/sweep permeable paving installation using: o Walk-behind vacuum(sidewalks) o High efficiency regenerative air or vacuum sweeper(roadways,parking lots) o Shop Vac or brush brooms(small areas) • Note:Vacuum settings may have to be adjusted to prevent excess uptake of aggregate from paver openings or joints. Vacuum surface openings in dry weather to remove dry,encrusted sediment. A b Surface is clogged: •Review the overall performance of the facility(note that small clogged areas may not reduce overall performance of facility) Ponding on surface or water flows off the permeable •Test the surface Infiltration rate using ASTM C1701 as a corrective maintenance Indicator.Perform one test per installation, pavement surface during a rain event(does not infiltrate)] up to 2,500 square feet.Perform an additional test for each additional 2,500 square feet up to 15,000 square feet total.Above 15,000 square feet,add one test for every 10,000 square feet. • If the results indicate an infiltration rate of 10 inches per hour or less,then perform corrective maintenance to restore permeability. •Clogging is usually an issue in the upper 2 to 3 centimeters of aggregate.Remove the upper layer of encrusted sediment, and fines,and/or vegetation from openings and joints between the pavers by mechanical means and/or suction equipment (e.g.,pure vacuum sweeper). • Replace aggregate In paver cells,joints,or openings per manufacturer's recommendations A Sediment present at the surface of the pavement •Assess the overall performance of the pavement system during a rain event.If water runs off the pavement and/or there is ponding,then see above. •Determine source of sediment loading and evaluate whether or not the source can be reduced/eliminated.If the source cannot be addressed,consider increasing frequency of routine cleaning(e.g.,twice per year instead of once per year). Summer Moss growth inhibits infiltration or poses slip safety hazard •Sidewalks:Use a stiff broom to remove moss in the summer when It is dry •Parking lots and roadways:Vacuum sweep or stiff broom/power brush for cleaning moss from pavement surface A Paver block missing or damaged Remove individual damaged paver blocks by hand and replace or repair per manufacturer's recommendations A Loss of aggregate material between paver blocks Refill per manufacturer's recommendations for interlocking paver sections A Settlement of surface May require resetting Open-celled paving A or B None(routine maintenance) • Remove sediment debris,trash,vegetation,and other debris deposited onto pavement(rakes and leaf blowers can be used grid with gravel for removing leaves) •Follow equipment manufacturer guidelines for cleaning surface. A b Aggregate Is clogged: •Use vacuum truck to remove and replace top course aggregate Ponding on surface or water flows off the permeable • Replace aggregate in paving grid per manufacturer's recommendations pavement surface during a rain event(does not infiltrate)] A Paving grid missing or damaged •Remove pins,pry up grid segments,and replace gravel • Replace grid segments where three or more adjacent rings are broken or damaged • Follow manufacturer guidelines for repairing surface. A Settlement of surface May require resetting A Loss of aggregate material in paving grid Replenish aggregate material by spreading gravel with a rake(gravel level should be maintained at the same level as the plastic rings or no more than 1/4 inch above the top of rings).See manufacturer's recommendations. A Weeds present • Manually remove weeds •Presence of weeds may indicate that too many fines are present(refer to Actions Needed under"Aggregate is clogged"to address this issue) 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). b Inspection should occur during storm event. Volume V—Runoff Treatment BMPs—December 2014 4-61