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Appendix 1: AQ/HRA SOW EXHIBIT A—AMENDED SCOPE OF SERVICES AND COSTS Scope of Work Based on the revised application submittal for the proposed project at 1601 EI Camino Real, and the relation to additional offsite affordable housing development, the following scope of work integrates the development of the additional project site at 1304 EI Camino Real into the original CEQA compliance services. The augmented scope of work is based on Consultant's preliminary analysis of the project and potentially significant effects related to air quality, human health risks, and archeological resources at the original 1601 EI Camino Real project site. For the 1304 EI Camino Real portion of the project, Consultant will prepare a consistency analysis in compliance with CEQA Guidelines Section 15183. As outlined below in Task 3, Consultant will use the Initial Study format for the consistency analysis, which will be integrated into the Draft E I Ras either as an appendix or a stand-alone section. The scope of work includes the following tasks. Optional tasks will be determined at the discretion of the Community Development Director or its designee. 1. Task 1: Technical Studies Consultant will complete the following studies to support CEQA clearance of the 1304 EI Camino Real project site. • Air Quality Report (health risk assessment and criteria pollutants)_ Consultant will conduct a health risk assessment (HRA) that addresses the entire project at both 1304 EI Camino Real and 1601 EI Camino Real. Consultant will augment the analysis of criteria air pollutant, toxic air contaminant (TAC), and greenhouse gas (GHG) emission impacts underway for the 1601 EI Camino Real site by integrating the proposed offsite development of 38 residential units at 1304 EI Camino Real. Consistent with the Downtown Precise Plan (DPP) EIR, the analysis will address operational health risks on the project due to the proximity of EI Camino Real and the Caltrain alignment and the associated TAC emissions along these corridors. In addition, health risks on nearby sensitive land uses resulting from construction at both 1601 and 1304 EI Camino Real will be analyzed. See attached Appendix 1 for a complete scope of work. • Arborist Report Consultant's certified arborist will conduct an approximately half-day field visit to the project site. The arborist report will provide information following an approach similar to the Preliminary Arborist Report prepared for the 1601 EI Camino Real site and include an evaluation of the health and structural condition of each tree, an identification of the trees that would be impacted by the proposed project, and recommendations Portree preservation during the design, construction, and operational phases of the project. • Historic Resources Report Consultant will prepare a Historical Resource Inventory and Evaluation and Historical Resources Impacts Analysis Technical Report (technical report) for the 1304 EI Camino Real site. Work includes a site visit, research, development of historical context of the building on site; evaluation of the historic -age property for eligibility for California Register of Historical Resources (CRHR) and/or City of Redwood City historic designation criteria (Redwood City Municipal Code Chapter 40 — Historic Preservation, Sec 40.6); and a historical resources impacts assessment to 1304 EI Camino Real (if it is found to be an historical resource). Consultant will also provide an analysis of potential indirect effects of the project on the nearby 1322 EI Camino Real, which was evaluated in 2010 and found eligible as a Redwood City historic resource. See attached Appendix 2 for a complete scope of work. • Noise Impact Report. Consultant will conduct up to four long-term measurements at the project boundaries to document the existing day -night noise environment. The existing ambient noise levels will be used to estimate the Sound Transmission Class (STC) ratings needed to meet the applicable interior noise criterion of 45 dB Ldn for residential use (50 dB, Ldn for commercial use). AECOM AM/AGR/2019/AMENDMENTS/AMEND NO.1-AECOM REV: 0617-19 PR Page 1 of 22