Initial Study/Mitigated Negative Declaration 2131 Sand Hill Road Office Project March 2017 TABLE OF CONTENTS Acronyms and Abbreviations……………………………………………………...………………………………………..v Section 1.0 Introduction and Purpose ................................................................................................ 1 1.1 Purpose of The Initial Study ................................................................................................... 1 1.2 Public Review Period ............................................................................................................. 1 1.3 Consideration of the Initial Study and Project ........................................................................ 1 1.4 Notice of Determination ......................................................................................................... 1 Section 2.0 Project Information ......................................................................................................... 3 2.1 Project Title ............................................................................................................................ 3 2.2 Lead Agency Contact ............................................................................................................. 3 2.3 Project Applicant .................................................................................................................... 3 2.4 Project Location ...................................................................................................................... 3 2.5 Assessor’s Parcel Numbers ..................................................................................................... 3 2.6 General Plan Designation and Zoning District ..................................................................... 11 2.7 Project-Related Approvals, Agreements, and Permits.......................................................... 11 Section 3.0 Project Description ........................................................................................................ 13 3.1 Existing Site Conditions ....................................................................................................... 13 3.2 Proposed Project ................................................................................................................... 13 3.3 Uses of the Initial Study ....................................................................................................... 25 Section 4.0 Environmental Checklist and Impact Discussion ......................................................... 27 4.1 Aesthetics .............................................................................................................................. 29 4.2 Agricultural and Forestry Resources .................................................................................... 45 4.3 Air Quality ............................................................................................................................ 47 4.4 Biological Resources ............................................................................................................ 62 4.5 Cultural Resources ................................................................................................................ 70 4.6 Geology and Soils ................................................................................................................. 74 4.7 Greenhouse Gas Emissions ................................................................................................... 81 4.8 Hazards and Hazardous Materials ........................................................................................ 87 4.9 Hydrology and Water Quality .............................................................................................. 95 4.10 Land Use and Planning ....................................................................................................... 104 4.11 Mineral Resources .............................................................................................................. 115 4.12 Noise and Vibration ............................................................................................................ 117 4.13 Population and Housing ...................................................................................................... 128 4.14 Public Services ................................................................................................................... 130 2131 Sand Hill Road Office i Initial Study City of Menlo Park March 2017 4.15 Recreation ........................................................................................................................... 134 4.16 Transportation/Traffic......................................................................................................... 136 4.17 Utilities and Service Systems ............................................................................................. 155 4.18 Mandatory Findings of Significance .................................................................................. 160 4.19 Summary Table of Impacts and Mitigation Measures ........................................................ 163 Section 5.0 References ................................................................................................................... 175 Section 6.0 Lead Agency and Consultants ..................................................................................... 179 6.1 Lead Agency ....................................................................................................................... 179 6.2 Consultants ......................................................................................................................... 179 Section 7.0 Mitigated Negative Declaration .................................................................................. 181 2131 Sand Hill Road Office ii Initial Study City of Menlo Park March 2017 TABLE OF CONTENTS Figures Figure 1: Regional Map ........................................................................................................................ 5 Figure 2: Vicinity Map .......................................................................................................................... 7 Figure 3: Aerial Photograph and Surrounding Land Uses .................................................................... 9 Figure 4: City Boundary Map ............................................................................................................. 13 Figure 5: Conceptual Site Plan............................................................................................................ 19 Figure 6: Front and Left Building Elevations ..................................................................................... 21 Figure 7: Rear and Right Building Elevations .................................................................................... 23 Figure 8: Artistic Rendering of Building from Sand Hill Road .......................................................... 33 Figure 9: Sensitive Receptor Locations .............................................................................................. 57 Figure 10: Existing and Proposed General Plan Land Use Designations ......................................... 107 Figure 11: Existing and Proposed Zoning Districts .......................................................................... 111 Figure 12: Intersections and Bicycle Facilities ................................................................................. 139 Photographs Photos 1 – 2 .......................................................................................................................................... 33 Photos 3 – 4 .......................................................................................................................................... 35 Photos 5 – 6 .......................................................................................................................................... 37 Photos 7 – 12 ........................................................................................................................................ 39 Tables Table 2.6-1: General Plan and Zoning ................................................................................................ 11 Table 4.3-1: Air Quality Significance Thresholds .............................................................................. 52 Table 4.3-2: 2010 Clean Air Plan Applicable Control Measures ....................................................... 53 Table 4.3-3: Unmitigated Construction Project Impacts..................................................................... 59 Table 4.3-4: Cumulative Construction Impact Assessment ................................................................ 60 Table 4.4-1: Tree Species Found on Site ............................................................................................ 65 Table 4.12-1: Estimated Construction Noise Levels at Nearby Land Uses ...................................... 125 Table 4.16-1: Signalized Intersection Level of Service Definitions Based on Control Delay ......... 143 Table 4.16-2: Existing Levels of Service .......................................................................................... 145 Table 4.16-3: Project Trip Generation Estimates .............................................................................. 148 Table 4.16-4: Near-Term Levels of Service ....................................................................................