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Line 15: − + − *'''Uneven Pavers''': An uneven paver surface can be repaired by pulling up the pavers, redistributing the bedding layer, and then placing the pavers back. New filler stone will need to be swept into the replaced pavers. Typically the pavers are packed very tightly, and breaking one or more pavers will be necessary to pull up a group of pavers. Keeping a set of replacement pavers after construction will be useful for making future repairs. − *'''Weeds''': Over time, weed growth may become an aesthetic problem, particularly on surfaces with infrequent traffic. Keeping the pavement surface free of organic material through regular sweeping and vacuuming can impede weeds from taking root. Ontario has banned the use of cosmetic herbicides for weed control. − *'''Vacuuming''': Annual vacuuming of permeable interlocking concrete pavers can increase the operational lifespan of these pavers. <ref> Jennifer Drake, Andrea Bradford, Tim Van Seters and Glenn MacMillan, 2016. Evaluation of Permeable Pavements in Cold Climates. accessed at https://sustainabletechnologies.ca/app/uploads/2013/02/KPP-Final-2012.pdf </ref> − *'''Winter Maintenance''': Sand should not be spread on permeable pavement as it can quickly lead to clogging. Deicers should only be used in moderation and only when needed because dissolved constituents are not removed by the pavement system. Pilot studies at the University of New Hampshire Stormwater Center have found that permeable pavement requires 75% less salt than conventional pavement over the course of a typical winter season. <ref>University of New Hampshire Stormwater Center (UNHSC). 2007. 2007 Annual Report. Durham, NH.</ref> − *'''Snow Plowing''': Permeable pavement is plowed for snow removal like any other pavement. When groundwater contamination from chlorides is a concern, plowed snow piles and snow melt should not be directed to permeable paver and porous pavement systems<ref>Smith, D. 2006. Permeable Interlocking Concrete Pavements; Selection, Design, − Construction, Maintenance. 3rd Edition. Interlocking Concrete Pavement Institute.Burlington, ON.</ref><br> Also, plowed snow/snow piles should not be stored on top of permeable pavements, since this snow often contains granular materials which can contribute to clogging − Annual inspections of permeable pavement should be conducted in the spring prior to onset of the summer thunderstorm season. These inspections should check for evidence of spills and surface ponding (staining or sediment accumulation on pavement surface), damage and deterioration. + − + + + +
Stormwater Tree Trenches: Maintenance (view source)
Revision as of 22:02, 23 February 2022
, 2 years agono edit summary
*'''Soil / Growing Medium''': Testing of soil to determine its structure, organic matter and confirm microbial level counts are satisfactory for selected vegetation will take place at installation and during performance diagnostic intervals. Whereas organic fertilizing and soil amendments recommended by testing will be done on an as-need basis.
*'''Soil / Growing Medium''': Testing of soil to determine its structure, organic matter and confirm microbial level counts are satisfactory for selected vegetation will take place at installation and during performance diagnostic intervals. Whereas organic fertilizing and soil amendments recommended by testing will be done on an as-need basis.
*'''Potholes''': For porous asphalt or pervious concrete, isolated potholes can be patched with standard patching mixes. Patching can continue until the structural integrity of the pavement has been compromised or stormwater can no longer drain to the aggregate base. Then the surface will need to be torn up and replaced.
*'''Soil Cells''': As these structural components for stormwater management are installed at the beginning stages of this BMP feature there are no routine maintenance tasks expected during the stated design life life of the feature. If there are please refer to the manufacturer and their warranty process. For replacement of components contact the soil cell manufacturer.
*'''Underdrain''': Flush out accumulated sediment with a hose or for more intensive clogging a pressure washer, done annually.
For more detailed guidance, refer to STEP's Low Impact Development Stormwater Management Practice Inspection and Maintenance Guide and Permeable Pavements Inspection and Maintenance Fact Sheet, both of which can be accessed [https://sustainabletechnologies.ca/home/urban-runoff-green-infrastructure/low-impact-development/low-impact-development-stormwater-practice-inspection-and-maintenance-guide/ here]
*'''Vegetation''': Perform routine vegetation maintenance tasks (i.e., watering, weeding, trimming) at recommended frequencies (weekly or as required to maintain optimal soil moisture) over the two-year establishment period for the plantings; and replace plants that don't survive the initial establishment period (assumes 10% and 20% of plant material does not survive the first year for Minimum Recommended and High Frequency maintenance scenarios, respectively). Replacement of dead/diseased plants once established shall take place every 6 months or yearly dependent upon the minimum of 80% vegetation coverage. Remove any undesirable vegetation (invasive, seedlings etc.) every 3 - 6 months, and ensure proper pruning, cut back and thinning of shrubs and plants every year.
For more detailed guidance, refer to STEP's Low Impact Development Stormwater Management Practice Inspection and Maintenance Guide and The City of Toronto's, Design Criteria for
Green Infrastructure in the Right-of-Way documents, both of which can be accessed [https://sustainabletechnologies.ca/home/urban-runoff-green-infrastructure/low-impact-development/low-impact-development-stormwater-practice-inspection-and-maintenance-guide/ here] and [https://www.toronto.ca/wp-content/uploads/2021/09/965f-ecs-specs-gi-design-criteria-manual-Sep2021.pdf/ here].