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POTENTIALLY <br />ISSUES <br />POTENTIALLY <br />SIGNIFICANT <br />LESS THAN <br />NO <br />SIGNIFICANT <br />UNLESS <br />SIGNIFICANT <br />IMPACT <br />SOURCES <br />ISSUES <br />MITIGATION <br />IMPACT <br />INCORPORATED <br />0. Result in substantial soil erosion or the loss of <br />X <br />1, 2 <br />topsoil? <br />C. Be located on a geologic unit or soil that is <br />X <br />2 <br />unstable, or that would become unstable as a <br />result of the project, and potentially result in <br />on- or off -site landslide, lateral spreading, <br />subsidence, liquefaction or collapse: <br />d. Be located on expansive soil, creating <br />X <br />2 <br />substantial risks of life or property? <br />e. Have soils capable of adequately supporting <br />X <br />2,7 <br />the use of septic tanks or alternative waste <br />water disposal systems where sewers are not <br />available for the disposal of waste water? <br />f. Any increase in wind or water erosion of soils, <br />X <br />2,7 <br />either on- or off -site? <br />g. Changes in deposition or erosion of beach, <br />X <br />2,7 <br />sands, or changes in siltation, deposition or <br />erosion which may modify the channel of a <br />river or stream or the bed of the ocean or any <br />bay, inlet or lake? <br />EXPLANATION: The project area is located within the seismically -active Bay Area. Active faults that may influence the <br />earthquake susceptibility of the site include: the active Hayward fault mapped about 1 mile northeast of the site; the active Calaveras <br />fault located about 11 miles to the northeast; and the active San Andreas fault located about 17 miles southwest of the site. The <br />Hayward, Calaveras and San Andreas faults are major active faults capable of generating earthquakes estimated to have maximum <br />dible magnitudes of 7.1, 6.8 and 7.9, respectively. However, the site is not within a currently designated "Special Studies Zone" <br />active faults. Therefore, it is likely that during the lifetime of any future buildings constructed on the project site, they will be <br />___)ject to seismic shaking and other earthquake -induced effects. The Uniform Building Code requires new building construction to <br />meet requirements for construction in earthquake -prone areas, which is intended to minimize any potential impacts related to seismic <br />events. The project site is currently served by sewers for disposal of wastewater. Future developments would be required to connect <br />to the City's sewer system, therefore impacts related to soils types and septic tanks are not applicable. No significant impacts related <br />to geology and soils are anticipated. <br />4. HYDROLOGY AND WATER QUALITY. Would the project: <br />a. Violate any water quality standards or waste <br />X <br />2 <br />discharge requirements? <br />b. Substantially deplete groundwater supplies or <br />X <br />2 <br />interfere substantially with groundwater <br />recharge such that there would be a net deficit <br />in aquifer volume or a lowering of the local <br />groundwater table level (e.g., the production <br />rate of pre-existing nearby wells would drop to <br />a level which would not support existing land <br />uses or planned uses for which permits have <br />been anted? <br />C. Substantially alter the existing drainage pattern <br />X <br />2,7 <br />of the site or area, including through the <br />alteration of the course of a stream or river, in <br />a manner which would result in substantial <br />erosion or siltation on- or off -site? <br />555 Estudillo - Initial Study Checklist q December 2001 <br />(Form rev. 11/06/00) <br />I$ <br />