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• Perform noise modeling of the existing roadway and two build alternatives using the Caltrans Traffic Noise Model (TNM) computer program. Calibrate noise model of existing roadway by comparison with data from long-term noise measurements. • Determine and evaluate traffic noise impacts and, where indicated by the analysis, investigate reasonable and feasible noise abatement in accordance with Caltrans and FHWA policies. Noise-sensitive areas that would be affected by the project but do not qualify for noise abatement will also be identified. However, based on the preliminary alternatives and the existing setting, entirely new noise abatement (new soundwalls) is not anticipated, and our estimated level of effort is based on this assumption. Illingworth and Rodkin, Inc. will be under subcontract to perform the technical analysis and preparation of the environmental noise study. A Noise Study Report (NSR) will be prepared as the technical document. The NSR will include standard measures to minimize construction noise impacts. A Noise Abatement Decision Report (NADR) will also be prepared that summarizes the NSR findings and documents locations with noise levels where abatement must be considered. Task 5.8-Water Quality Study To provide the existing physical and regulatory environment information for the water quality section of the environmental document, CONSULTANT will prepare a Water Quality Study Report that addresses the following: • Identify and describe the current and upcoming laws that relate to water quality. • Provide a summary of field surveys and background document review. • Describe the land use, geography, and topography of the project area. • Describe the beneficial uses for all potentially affected waters. • Discuss water quality objectives for all potentially affected waters. • Collect and present any monitoring data from other agencies. • List potential sources of pollutants. • Describe the watershed, and existing drainage and hydrologic conditions. CONSULTANT will evaluate the water quality impacts for two build alternatives and will recommend possible mitigation measures to reduce the adverse impacts to water quality. As the project would have a soil disturbance of more than one acre, it would need to adhere to the conditions of the Caltrans Construction General Permit (Order No. 2009-009-DWQ), issued by the State Water Resources Control Board (SWRCB). In accardance with Caltrans' Construction General Permit and National Pollutant Discharge Elimination System permit, Best Management Practices would be recommended for the project to reduce the discharge of pollutants temporarily, during construction, and permanently to the maximum extent practicable. Task 5.9-Visual Impact Study The visual environment includes the existing US 101 ramps, the Woodside Road undercrossing, other local streets, urban development including commercial and industrial land uses, and a PG&E substation and transmission towers east of US 101 between Woodside Road and Seaport ATTY/AGR/2013.164/URS PROFESSIONAL SERVICES AGR REV:10-15-13 VR Page 44 of 78