Permeable Pavement  Parking  Lot Demonstration Site
           This experimental parking lot demonstrates and allows EPA to docu-
           ment the capabilities of three types of porous pavement: interlocking
           concrete pavers, porous concrete, and porous asphalt. Stormwater
           runoff passes through porous pavement and seeps, or infiltrates, into
           the ground, mimicking natural hydrological processes, reducing the
           amount of pollutants in the runoff, and reducing the runoff volume.
                  \            \                           \
           Research
           Runoff flows from the conventional asphalt of the driving lanes to drain
           into the three porous surfaces.
           Runoff is collected after it filters through the porous pavement, allow-
           ing researchers to measure volume, flow rates, and quality. Monitoring
           instruments installed in and beneath the porous pavement allow study
           of the movement of runoff through the pavement, underlying layers,
           xand into the native soil.
                               \      \                \\
Results
The parking lot will help EPA determine whether the three different
permeable surfaces:
• Cool more effectively than conventional surfaces.
• Reduce stormwater volume flowing to receiving waters.
• Improve water quality by removing solids and other environmental
 contaminants.
_..
            \
 Acknowledgements
 This project is a joint effort between EPA's Office of Administration and Resources
 Management, Region 2, and Office of Research and Development.
Conventional Impervious Asphalt

-------