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E11~GE0 <br />I N G O R V O R A~ e D <br />improvements would adversely impact slope stability, subsurface drainage systems, erosion <br />protection, or detention systems. The GHAD shall act in an advisory capacity only and make its <br />recommendations known to the City of Pleasanton permit issuing authority. Homeowners, other <br />agencies or public utility companies requesting review will pay for reasonable services as <br />established by the GHAD. The GHAD also may exercise a public education and awareness <br />function by distributing information regazding landslide or erosion hazazds and by encouraging <br />the cooperation of residents. See Section G, below. <br />D. Geotechnical Techniques for Mitigation of Landslide and Erosion Hazards. <br />Geotechnical techniques for mitigating or repairing landslide or erosion damage include: <br />___ 1. Elimination of the unstable earth mass. <br />2. Stabilization (either partial or total) of a landslide by removal and replacement with <br />__ compacted drained fill. <br />3. Construction of structures to retain or divert landslide material or sediment. <br />4. Construction of erosion control devices such as gabions, riprap, geotextiles, or lined <br />ditches. <br />5. Placement of drained, engineered buttress fills. <br />- 6. Placement of subsurface drainage devices (e.g. underdrains or horizontal drilled drains). <br />7. Slope correction (e.g., gradient change, biotechnical stabilization, slope trimming or <br />- contouring). <br />8. Construction of additional surface ditches and/or detention basins, silt fences, sediment <br />- traps, backfill or erosion channels. <br />4291-W2 <br />July 17, 1997 <br />_ Revised October 9, 1997 <br />Revised October 22, 1997 13 <br />