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· Advantages: They both have a rustic (pebbled) but clean aesthetic. <br /> <br />· Disadvantages: Requires per/odic vacuuming or pressure washing to prevent <br /> clogging with fine debris. <br /> <br />Modular Pavers - Unit paving blocks that are made from stone, concrete, brick, and <br />asphalt, can be spaced apart and set on sand without mortar for pedestrian circulation. <br />Interlocking pavers set on engineered sub-grades can be used for limited, lightweight <br />vehicular access. <br /> <br />· Advantages: A wide range of concrete, stone, and brick pavers are available <br /> to meet aesthetic requirements. <br /> <br />Disadvantages: <br />hold in place. <br />slabs. <br /> <br />This is very labor intensive to install and requires edging to <br />Emergency vehicle access requires the use of concrete sub- <br /> <br />Grid Systems - Grid systems come in two forms: Concrete blocks with spaces for <br />planting turf, and plastic grids with spaces for planting turf. With both materials the <br />spaces are filled with drain rock or aggregate first, then planted with turf. <br /> <br />· Advantages: Of the three materials, this one literally is the "greenest," due to <br /> the turf or other plant material used with it. <br /> <br />· Some plastic grids are manufactured from recycled plastic, making them a <br /> more sustainable choice of material. <br /> <br />Disadvantages: Some of the plastic grids may present a tripping hazard with <br />certain kinds of shoes due to limited visibility of the underlying structure. The <br />concrete grids are more visible, presenting less of a tripping hazard, but due to the <br />increased visibility, may be considered aesthetically less appealing to many users. <br />Structural integrity varies depending on brand name and whether installed by <br />units or poured-in place. <br /> <br />4. Environmental Overlay Maps <br /> <br />During the Council's original review of the Draft Phase II Specific Plan back in 2003, staff <br />prepared a series often environmental overlay maps for use in the site planning process. These <br />maps were intended to assist the viewer in better understanding the various Bernal Property site <br />constraints, and thus to help in planning the location of the various potential land uses for the <br />most appropriate sites. The ten maps consisted of the following: <br /> <br />1. Base site conditions <br />2. Phase I and II Specific Plan areas <br />3. Parcel lines <br />4. Proposed community park location <br /> <br />SR 05:028 Page 9 <br /> <br /> <br />