St. Andrews Church was selected as a field site for evaluating cleaning practices on permeable pavement for the Evaluation of Permeable Pavements in Cold Climates.  This site was at least two years old and consisted of permeable interlocking concrete paver parking lot.

The 3 year study of the performance of different types of permeable pavements at the Living City Campus at Kortright in Vaughan is a research collaboration between STEP and the University of Guelph.  The different cleaning treatments ranged from hand sweeping, low and high suction vacuum, pressure wash, mechanical sweeper, regenerative air and vacuum-sweeping trucks .

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