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MOUNTAIN HOUSE PROPOSED ALTAMONT HEIGHTS TENTATIVE MAP 4. ENVIRONMENTAL CHECKLIST <br /> 4.8 HYDROLOGY AND WATER QUALITY <br /> ai <br /> Less Than <br /> ` Potential SPIHEIR Significant <br /> Significant Requires Impact Due New New <br /> Impact Additional to Mitigation Additional Additional <br /> Less Than Adequately Review:No Measures in Impact Not Mitigation <br /> Significant Addressed in Significant Project Addressed in Measures <br /> V Issue or No Impact SPIIIEIR Impact Description SPIIIEIR Required <br /> 8. HYDROLOGY AND WATER <br /> d QUALITY. Would the project: <br /> d.. a) Violate any water quality standards ■ ❑ ❑ <br /> 11 <br /> or waste discharge requirements? <br /> b) Substantially deplete groundwater ■ ❑ ❑ ❑ <br /> supplies or interfere substantially <br /> with groundwater recharge such that <br /> there would be a net deficit in <br /> aquifer volume or a lowering of the <br /> ` local groundwater table level(e.g., <br /> the production rate of pre-existing <br /> nearby wells would drop to a level <br /> which would not support existing <br /> land uses or planned uses for which <br /> permits have been granted)? <br /> c) Substantially alter the existing ■ ❑ ❑ ❑ ❑ <br /> drainage patter of the site or area, <br /> r including through the alteration of <br /> the course of a stream or river,in a <br /> manner which would result in <br /> substantial erosion or siltation on-or <br /> off-site? <br /> d) Substantially alter the existing ■ ❑ ❑ ❑ ❑ El <br /> drainage pattern of the site or area, <br /> ` including through the alteration of <br /> the course of a stream or river,or <br /> substantially increase the rate or <br /> amount of surface runoff in a <br /> manner which would result in <br /> flooding on-or off-site? <br /> e) Create or contribute runoff water ■ <br /> which would exceed the capacity of <br /> existing or planned stonnwater <br /> drainage systems or provide <br /> substantial additional sources of <br /> polluted runoff? <br /> r <br /> I) Otherwise substantially degrade ■ ❑ ❑ 11 L1 ❑ <br /> water quality? <br /> g) Place housing within a 100-year ■ <br /> flood hazard area as mapped on a <br /> federal Flood Hazard Boundary or <br /> Flood Insurance Rate Map or other <br /> ` flood hazard delineation map? <br /> h) Place within a 100-year flood hazard ■ ❑ E <br /> area structures which would impede <br /> or redirect flood flows? <br /> y. <br /> 4-40 <br />