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7.1.H. - Page 33 Exhibit C
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<br /> Figure 3.Residential construction increases the likelihood of sediment accumulation in permeable pavements(left).A pervi-
<br /> ous asphalt pavement near Philadelphia,PA,is clogged due to runoff from an adjoining area that was not stabilized(right).
<br /> placed upon snow and ice and is later plowed to a loca- (2) preventive street sweeping, (3)weeding,and (4) stain
<br /> tion that drains to or on top of permeable pavement, a removal.Additionally, some pavement type-specific tasks
<br /> clogging source is introduced to the pavement. Either include: (1)restorative street sweeping and(2)mowing.
<br /> (1) preventing the stockpiling of snow on permeable Each of those inspection and maintenance activities
<br /> pavement or(2) requiring post-event street sweeper is discussed in more detail.
<br /> maintenance (discussed later) are two options of limit-
<br /> ing winter weather induced clogging.
<br /> Inspection
<br /> Regular inspection is an essential part of permeable
<br /> PRIMARY INSPECTION AND MAINTENANCE pavement maintenance. During the visit the pave-
<br /> TASKS merit's surface can be examined for accumulated dust,
<br /> Permeable pavement maintenance is rather straightfor sediment, and debris (Figure 4).A simple test to verify
<br /> ward when compared to other stormwater management
<br /> whether the pavement is infiltrating properly is to
<br /> practices (such as bioretention, wet ponds, and storrnwa empty a bucket or large bottle of water on the pave-
<br /> ter wetlands). The common inspection and maintenance ment and examine how long it takes for water to soak
<br /> tasks are: (1)verifying that clogging has not occurred, through the pavement and the ``water mark"that is left.
<br /> Pavements that require from several seconds to
<br /> - . min-
<br /> `i r t r . aid s iy r r r le
<br /> - --,:'-' ‘. , ,,r,-- .. -r * ,,r..,,,,t...,; . „...,, . ....: , , ,
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<br /> Figure 4.Visual inspection of a pervious concrete lot in Georgia shows accumulation of both sediment and leaf debris(left).
<br /> The fact that the lot is clogged is confirmed by emptying approximately 1 gallon of water on the lot,which subsequently
<br /> runs off rather than infiltrating(right).
<br /> Maintaining Permeable Pavements 3
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