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Hacienda Mixed Use Rezoning Initial Study such resources. Additionally, mitigation measures may be imposed to provide for archaeological sites discovered during construction. Generally, imposing mitigation measures would reduce archeological resource effects to a less than- significant level. Discussion of Checklist Items Less than Significant Impacts. As noted above, the project site is in an area of high archaeological sensitivity. The zoning change itself would not include any construction, and the proposed residential and retail land uses would not be expected to result in any greater impacts, if any, than could occur under existing zoning and under the existing development plan. This issue will be addressed in the environmental review documents at the time a development plan is proposed for the project sites. No Impact. As noted above, all pre business park structures located at Hacienda were demolished and only the relatively new structures related to the business park remain. Therefore, the project would not result in a direct impact to historic resources. No rock outcroppings are located in the project vicinity and no paleontological remains have been identified nearby, or would be expected in this area. Less Than Potentially Significant with Less Than No Significant Mitigation Significant Impact Impact Incorporation Impact 6. Geology and Soils Would the project: a) Expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving: i) Rupture of a known earthquake fault, as delineated on the X 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. ii) Strong seismic ground shaking? X iii) Seismic related ground failure, including liquefaction? X iv) Landslides? X b) Result in substantial soil erosion or the loss of topsoil? X c) Be located on a geologic unit or soil that is unstable, or that X would become unstable as a result of the project, and potentially result in on- or off -site landslide, lateral spreading, subsidence, liquefaction or collapse? d) Be located on expansive soil, as defined in Table 18 -1 -B of the Uniform Building Code (1994), creating substantial risks to X life or property? e) Have soils incapable of adequately supporting the use of X septic tanks or altemative waste water disposal systems where sewers are not available for the disposal of waste water? Environmental Setting The three project sites are located on relatively flat land. The City has referred to the Public Safety Element of the Pleasanton General Plan and to the geotechnical investigation prepared for the Hacienda Draft, Subject to Revision 13 8/31/2009