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LOA ASSOCIATES. INC. CEQA INITIAL STUDY /MITIGATED NEGATIVE DECLARATION <br /> MARCH 5011 PREDA STREET PIPE SRIDOES UPGRADE <br /> SAN LEANDRO. CALIFORNIA <br /> table level (e.g., the production rate of pre- existing nearby wells would drop to a level which <br /> would not support existing land uses or planned uses for which permits have been granted)? <br /> No Impact. Grading activities would not affect an aquifer or the local water table. The proposed <br /> project would not require the use of groundwater supplies or interfere substantially with <br /> groundwater recharge. <br /> c) Substantially alter the existing drainage pattern of the site or area, including through the <br /> alteration of the course of a stream or river, in a manner which would result in substantial <br /> erosion or siltation on- or off site? <br /> Less Than Significant with Mitigation Incorporated. No significant change would occur in the <br /> drainage patterns of the project site or area that would result in substantial erosion or siltation on- <br /> or off -site. The proposed project would not require work in the bed of San Leandro Creek and <br /> would not alter its course. During construction, Best Management Practices would be <br /> implemented, and after construction, native trees would be replaced (Mitigation Measure BIO -4) <br /> which will help to reduce erosion and siltation on- and off -site (See response IX(a) above). <br /> d) Substantially alter the existing drainage pattern of the site or area, including through the <br /> alteration of the course of a stream or river, or substantially increase the rate or amount of <br /> surface runoff in a manner which would result in flooding on- or off -site? <br /> Less Than Significant Impact. Implementation of the proposed project would not result in an <br /> increase in impervious surfaces or a resulting increase in surface runoff. After project completion, <br /> the drainage pattern of the site or area, and the amount of surface water runoff, would be similar <br /> to existing conditions. Therefore, this impact is considered less than significant. <br /> e) Create or contribute rwtoff water which would exceed the capacity of existing or planned <br /> stormwater drainage systems or provide substantial additional sources of polluted runoff? <br /> No Impact. Implementation of the proposed project would not result in an increase in impervious <br /> surface. Therefore, the proposed project would not create or contribute to runoff water that would <br /> exceed the capacity of existing or planned storm water drainage systems or provide substantial <br /> additional sources of polluted runoff. <br /> Otherwise substantially degrade water quality? <br /> Less Than Significant with Mitigation Incorporated. Construction of the proposed project <br /> would require grading and the use of construction equipment that could result in sediment or <br /> hazardous materials entering San Leandro Creek. These potential impacts would be reduced to a <br /> less than significant level through implementation of BMPs and Mitigation Measure HAZ -1, <br /> described above. <br /> gl Place housing within a 100 year flood hazard area as mapped on a federal Flood Hazard <br /> Boundary or Flood Insurance Rate Map or other flood hazard delineation map? <br /> • <br /> P: \EGI080110EQA\Preda FINAL IS- MND.doc (03 /28/11) 39 <br />