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-t7- <br />Cut and fill slopes should be revegetated or protected <br />• ap,ainst erosion by other means. In general, revegetation oC <br />slopes steeper than about 1 1/2 }iorizontal to 1 vertical will be <br />difficult. To help revegetate very steep cut and fill slopes a <br />geogrid or mesh to help the root system of the vegetation begin <br />can be used. In addition to revegetation to help prevent <br />erosion, surface water should not be allowed to discharge uncon- <br />trolled onto the cut and fill s1oF~es. Uncontrolled runoff can be <br />prevented by use of ditches at the tops of slopes and lined or <br />riprap ditches on the slopes to handle discharge down the slopes. <br />Surface water should not be allowed to pond within 10 feet of <br />buildings or structures. ~9oisture infiltration could adversely <br />impact foundation and floor slab members. Perimeter backfill <br />• should be compacted to the job specifications and have a surface <br />slope o£ at least 5p (non-pavecJ areas) away from structures. <br />Vegetation requiring regular watering should not be located <br />within 10 feet of the building perimeter. <br />BUILDING AND SITE MAINTENANCE <br />Proper building and site maintenance becomes the owner's <br />responsibility after completion of the construction. A preven- <br />tive maintenance program should he established for certain <br />geotechnical aspects of the surface facility site. The mainte- <br />Hance program should identify ar:d correct problems related to: <br />1) Poor surface drainage; 2) Swelling or settling soils; 37 Slope <br />erosion and 4) Instability of graded slopes. <br />J <br />Chen & Associates <br />