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previous EIR adequately apply to the project as modified. Accordingly, the SEIR need contain only the analysis necessary to respond to the proposed change in the project that triggered the need for additional environmental review. SEIR Description: An SEIR is an informational document, the purpose of which is to make the public and decision-makers aware of the environmental consequences of a project. It is also intended for use by responsible agencies in considering any actions they must take or permits they must issue as a result of implementation of the Housing Element and Climate Action Plan. Together the DSEIR and the FSEIR compose the entire SEIR document for the project. Staff is recommending adoption of these documents. As is common with General Plans and Housing Elements, the SEIR identifies potential environmental impacts and mitigation measures. Analysis of the impacts of the proposed project indicated potential significant impacts on Aesthetics, Air Quality, Biological Resources, Cultural Resources, Hazards and Hazardous Materials, Noise, Public Services and Utilities (Water), and Transportation. The impacts requiring mitigation were all ascribed to impacts of the Housing Element, and specifically to residential development that would be allowed with the potential rezoning of sites. Most of these impacts would be reduced to a less than significant impact with the application of the mitigation measures described in the SEIR. The mitigation measures are generally typical of measures applied to development in Pleasanton, such as: dust control during construction: pre-construction surveys to avoid impacts on birds, bats or burrowing owls; protection of creeks and riparian vegetation; archaeological monitoring for archaeologically sensitive sites; Phase 1 environmental assessments required to assess any hazardous materials on sites; a limitation on the hours of construction; vibration and acoustical studies to determine appropriate construction techniques and sound mitigation for new buildings; and payment of impact fees. The following paragraphs describe the two significant and unavoidable impacts which are identified in the Supplemental Environmental Impact Report: Impact 4.D-1: Development facilitated by the General Plan Amendment and rezoning has the potential to adversely change the significance of historic resources. Construction activities such as grading and excavation associated with development on the potential sites for rezoning identified in the proposed Housing Element could potentially affect known historic or cultural resources. Specifically, Site 6 (Irby-Kaplan-Zia) and Site 21 (4202 Stanley) include various early 20th century buildings that may be historic. These resources could be directly adversely impacted by development if they are demolished to make way for new housing. Mitigation measures 4.D-la and 4.D-1b include the requirement for a historic evaluation at Sites 6 and 21. These evaluations may determine that these buildings are not eligible for consideration as historic resources. However, if one or more of these buildings is determined to have historic significance, demolition would remain significant and unavoidable even with implementation of mitigation requiring documentation of the resource. Page 6 of 12