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Fi MOUNTAIN HOUSE PROPOSED ALTAMONT HEIGHTS TENTATIVE MAP 4. ENVIRONMENTAL CHECKLIST 4.6 GEOLOGY AND SOILS F Less Than FFF Potential SPIIIEIR Significant Significant Requires Impact Due New New Impact Additional to Mitigation Additional Additional Less Than Adequately Review:No Measures in Impact Not Mitigation FSignificant Addressed in Significant Project Addressed in Measures Issue or No Impact SPIIIEIR Impact Description SPIIIEIR Required 6. GEOLOGY AND SOILS. Would Fthe project: a) Expose people or structures to otentW substantial adverse effects, , including the risk of loss,injury,or death involving: Fi i) Rupture of a known earthquake ■ El F1 fault,as delineated on the most recent Alquist-Priolo Earthquake Fault Zoning Map issued by the State Geologist for the area or based on other substantial evidence of a known fault? Refer to Division of Mines and Geology Special Publication 42. Fj ii) Strong seismic ground ❑ ■ shaking? iii) Seismic-related ground failure, ■ ❑ ❑ ❑ ❑ 11 including liquefaction? iv) Landslides? . ❑ ❑ 11 11 El b) Result in substantial soil erosion or ■ the loss of topsoil? 11 11 11 El ' c) Be located on a geologic unit or soil ■ Ll L1 11 El that is unstable,or that would become unstable as a result of the I project,and potentially result in on- I or off-site landslide,lateral spreading,subsidence,liquefaction or collapse? F4 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 P property? e) Have soils incapable of adequately ■ ❑ L Ll 11 ❑ (- supporting the use of septic tanks or FJI alternative wastewater disposal systems where sewers are not available for the disposal of F1 wastewater? i Fi I I 4-27 I