Changes

*Remove trash regularly (biannually-quarterly);

*Remove trash regularly (biannually-quarterly);

*Grid systems with soil and grass fill are maintained like lawns;

*Grid systems with soil and grass fill are maintained like lawns;

*Sweep and vacuum interlocking and rigid pavements regularly (annually-biannually) with regenerative air/pure vacuum sweeper;

*Sweep and vacuum the entire permeable pavement surface regularly (annually-biannually) with regenerative air or pure vacuum sweeper <ref> Weiss, P.T., Kayhanian, M., Gulliver, J.S., Khanzanovich, L. 2019. Permeable pavement in northern North America urban areas: research review and knowledge gaps. International Journal of Pavement Engineering. Vol.20, No.2, 143-162. https://www.tandfonline.com/doi/full/10.1080/10298436.2017.1279482 </ref>  <ref> Al-Rubaei, A.M., Stenglein, A.L., Viklander, M., Blecken, G.T. 2013. Long-Term Hydraulic Performance of Porous Asphalt Pavements in Northern Sweden. Journal of Irrigation and Drainage Engineering. Vol.139 No.6: 499-505. https://ascelibrary.org/doi/10.1061/%28ASCE%29IR.1943-4774.0000569 </ref> <ref> Permeable Pavements Task Committee. 2015. Permeable Pavements. Edited by Eisenberg, B., Collins Lindow, K. and Smith, D.R., Amercian Society of Civil Engineers (ASCE), Reston VA. https://ascelibrary.org/doi/book/10.1061/9780784413784 </ref>;

*Plow snow as needed and spread deicers sparingly during winter;

*Plow snow as needed and spread deicers sparingly during winter;

*Repair ruts or local sinking of 15 mm or greater over a 3 metre length, adjacent pavers or cracks in pervious concrete or porous asphalt are vertically offset by 5 mm or greater and paver joint fill is missing or below 15 mm from the paver surface.

*Repair ruts or local sinking of 15 mm or greater over a 3 metre length, adjacent pavers or cracks in pervious concrete or porous asphalt are vertically offset by 5 mm or greater and paver joint fill is missing or below 15 mm from the paver surface.