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Exhibit C 7.1.H. - Page 38
<br /> OIL AND GREASE STAINS maintenance.Although not necessarily inexpensive, per-
<br /> Can you live with them? Many permeable pavement meable pavement maintenance is very straightforward.
<br /> applications are along parking lot perimeters, and the Other tasks that maintenance professionals should con-
<br /> client may be comfortable with simply allowing the sider include stain removal,weed removal, and in some
<br /> pavements to slowly stain. Clearly, pervious asphalt cases mowing.The exact maintenance tasks will vary by
<br /> does not show stains as much as other pavement types. permeable pavement type and intended function.
<br /> A designer has the option of selecting pavement types REFERENCES
<br /> that camouflage stains better than others. However, the
<br /> same pavement types that are good at hiding stains also Bean, E.Z., W.F. Hunt, and D.A. Bidelspach. (2007).
<br /> have low albedo,which conflicts with another driver Field survey of permeable pavement surface infiltra-
<br /> for the use of permeable pavement. (Designers choose tion rates.Journal of Irrigation and Drainage Engi-
<br /> high albedo pavements to comply with LEEDTm2 light neering. 133 (3): 247-255.
<br /> reflectivity goals.) James, W. and C. Gerrits. (2003). Ch 21: Maintenance
<br /> Can you remove stains?There are detergents, such of Infiltration in Modular Interlocking Concrete Pav-
<br /> as Pour-N-Restorer"', that can be used to partially ers with External Drainage Cells. In Practical Model-
<br /> remove stains. They are applied to the stain and allowed ing of Urban Water Systems, Mono, 11. 417-435 W.
<br /> to soak. The following day, the soap is pressure washed James, ed. Guelph, Canada: CHI.
<br /> from the blocks (Figure 9). The majority of stain is
<br /> removed, but inspection will show a watermark from Mata, L.A. (2008). Sedimentation of Pervious Concrete
<br /> where the stain had been. Pavement Systems. Ph.D. Dissertation.North Caro-
<br /> lina State University. Raleigh,NC.
<br /> SUMMARY Related Bulletins in the Urban Waterways (AG-588)
<br /> Designers choose permeable pavements because they Series:
<br /> reduce runoff volume,mitigate runoff peaks, and segues- Hunt, W.F. and K.A. Collins. 2008.Permeable Pave-
<br /> ter many forms of pollution.They may also provide ment: Research Update and Design Implications.
<br /> other benefits like groundwater recharge, minor evapo- North Carolina Cooperative Extension, Raleigh,NC.
<br /> transpiration losses, light reflectivity(albedo), and visual AG-588-14W.
<br /> improvement. For permeable pavements to remain
<br /> permeable,their surface layer must be freely draining,
<br /> making clogging prevention and street sweeping the Leadership in Energy and Environmental Design,an effort of the US
<br /> most important tasks associated with inspection and Green Building Council.
<br /> Prepared by
<br /> William F.Hunt,Ph.D.,PE,Associate Professor and Extension Specialist,
<br /> Biological and Agricultural Engineering Department,North Carolina State University
<br /> Published by
<br /> NORTH CAROLINA COOPERATIVE EXTENSION
<br /> COLftOt OE
<br /> AGRICULTURE; :&LIFE SCIENCES
<br /> ACADEMICS RESEARCH - EXTENSION
<br /> Distributed in furtherance of the acts of Congress of May S and June 30,1914.North Carolina State University and North Carolina A&T State University commit themselves to positive action to
<br /> secure equal opportunity regardless of race,color,creed,national origin,religion,sex,age,veteran status or disability.In addition,the two Universities welcome all persons without regard to sexual
<br /> orientation.North Carolina State University,North Carolina AN State University,U.S.Department of Agriculture,and local governments cooperating.
<br /> 12-CALS-2353 AG-588-23 W 8/1 1—VB/KEL
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