Can this credit point be achieved under the following pavement system scenario. We propose to use a tan-colored clay, open-grid pavement system filled with limestone gravel for the entire driveway and parking lot for our office building consisting of 90% of the site\'s hardscape surfaces (non-roof). You require "an open grid pavement system that is at least 50% pervious". This percentage drastically limits the pavement system choice to a plastic "egg carton-type", thin walled paving system. We have the "egg carton" system in several locations and they do not work for us because the constant traffic compacts the soil so grass will not grow resulting in bare dirt and increased runoff. (Defeating the purpose of using them.) This type of paver also presents a maintenance problem in the winter because they cannot be plowed. The thin-walled pavement systems are designed for occasional, light-duty use, not daily traffic. We are proposing the use of a clay paver for it\'s durability, ease of maintenance, and ability to have it produced in a light color which can meet the SRI requirements. The open grid in this type pavers can achieve 36% pervious openings. You define the open-grid pavement as ".pavement that contains vegetation in the open cells". In our experience, any open-grid pavement systems, even concrete cells, that have day to day traffic will not support vegetation due to soil compaction. This is why we propose that the grid be filled with gravel. This method will also allow evaporation as desired by this credit as well as infiltration and ground water recharge. The use of this system has allowed us to design the site without use of an underground storm sewer system and to infiltrate all site storm water. Philosophically we are suggesting a more sustainable method pavement system. The majority of the "egg carton-type" pavers are made of virgin plastics, require more energy to produce, and can not be recycled in this area. The clay pavers are made from a natural material and are chemically inert which allow it to be crushed and recycled as aggregate. To us this is a more sustainable choice.