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<br /> Figure 9.A stain remover applied to PICP(left)and subsequent pressure washing(right).Ideally,the stain remover is
<br /> allowed to set overnight.
<br /> Table 2.Summary Table of PP Maintenance.Maintenance tasks deemed essential to the hydrologic performance
<br /> of the device are in bold italics.
<br /> Task Frequency Notes and Drivers
<br /> Inspection Two-three months Avoid significant clogging by observation.
<br /> StreetSweeping(preventative) 2 to 4 times a year Using a regenerative air street sweeper for most pavements is appropriate.
<br /> Stain Removal Per client desires Stains may be tolerated.If stain must be removed,consider a biodegrad-
<br /> able detergent.
<br /> Weed removal Do upon inspection Use glyphosate.
<br /> Mowing In high season 1-2 times Some permeable pavement applications are meant to be mowed.
<br /> per month
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<br /> Maintaining Permeable Pavements 7
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