SU0006227 - Laserfiche WebLink

Home Browse Search

L MOUNTAIN HOUSE PROPOSED MACHADO TENTATIVE MAP 4. ENVIRONMENTAL CHECKLIST 4.6 GEOLOGY AND SOILS c) Be located on a geologic unit or soil that is unstable, or that would become unstable as a result of the project, and potentially result in on-or off-site landslide, lateral spreading, subsidence, liquefaction or collapse? LThe proposed project consists entirely of residential,commercial, and limited industrial development on a very slightly sloping site. Minor excavation and fill would be necessary to construct building pads and streets. As stated in the discussion of Item a)above, the potential for landslides and liquefaction at the site are considered remote, and construction of the proposed project would not change these conditions. The same is true regarding lateral spreading or subsidence. The geological and soils impacts of constructing the proposed project would be less than significant. Mitigation Measures LNo mitigation measures are required. L d) Be located on expansive soil, as defined in Table 18-1-B of the Uniform Building Code (1994), creating substantial risks to life or property? L The soils at the project site have high expansion potential (Anderson, 2005). Unless properly mitigated, soil expansion has the potential to damage foundations;cause cracks in exterior walls, floors, and ceilings; and cause wavy "roller coaster" surfaces along sidewalks and streets. Methods of controlling expansive soils include moisture conditioning of site soils L prior to construction, replacement of expansive clay soils with non-expansive fill, and lime treatment of expansive soils. A geotechnical engineer and structural engineer should evaluate each area of the project site during design and construction to determine the I.. appropriate option for expansive soil control. If the recommendations of the engineers are followed, the impacts of expansive soils would be less than significant. Mitigation Measures No mitigation measures are required. L e) Have soils incapable of adequately supporting the use of septic tanks or alternative wastewater disposal systems where sewers are not available for the disposal of L wastewater? The proposed project would be served by a municipal wastewater system and would not have any septic tanks or alternative waste disposal systems. Thus, there would be no impacts. Mitigation Measures No mitigation measures are required. i. tr 4-31 tr.