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Hacienda TOD Standards and Design Guidelines Initial Study Environmental Setting Hacienda is located in an arca of relatively high archaeological sensitivity. A portion of the former Willow Marsh, which once housed aboriginal populations, was located in the western and southern portions of Hacienda. Over the millennia, the edges of this marsh and the arroyos that fed it from the cast moved back and forth across the area Given that Hacienda is located within a region of historical and archaeological significance, the potential for finds exists within the area.' The project sites contain no historic structures. Hacienda demolished all extant buildings during development of the business park. Significance Criteria The impact questions above constitute the significance criteria for this environmental topic. The text below further explains and defines the significance criteria for impact question b). CEOA Guidelines Section 15061.5(c) applies to effects on archaeological sites. Effects on non - unique archaeological resources are not considered significant. Regarding unique archaeological resources, Icad agencies may require that reasonable efforts be made to allow such resources to be preserved in place or left in an undisturbed state. To the extent that unique archaeological resources are not preserved in place or left undisturbed, Public Resources Code Section 21083.2 requires mitigation measures to protect 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 - Sign ficant Impacts. As noted above, the project site is in an area of high archaeological sensitivity. The adoption of the TOD Standards and Guidelines 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 X effects, including the risk of loss, injuty, or death involving: ) Rupture of a known earthquake fau t, as delineated on the X most recent Alquist - Priolo Earthquak: Fault Zoning Map issued by the State Geologist for the area or based on other ' City of Pleasanton, Hacienda Business Park Planned Unit Development, PUD- 81 -30, Final Environmental Impact Report, May 1982. Draft, Subject to Revision 12 2/11/2011