Los Angeles FOOTHILL EXTENSION THIS PAGE INTENTIONALLY BLANK TABLE OF CONTENTS Topic Page CHAPTER 1. EXECUTIVE SUMMARY.......................................................................... 1-1 1.1 BACKGROUND...................................................................................................................... 1-1 1.2 STUDY AREA REFINEMENTS ......................................................................................... 1-1 1.3 PROJECT OBJECTIVES ....................................................................................................... 1-2 1.4 PROJECT ALTERNATIVES DISCUSSION .................................................................... 1-3 1.5 ENVIRONMENTAL PROCESS.......................................................................................... 1-3 1.6 SUMMARY OF IMPACTS AND MITIGATION BY REFINEMENT....................... 1-4 1.7 ISSUES TO BE RESOLVED ..............................................................................................1-14 1.8 AREAS OF CONTROVERSY............................................................................................1-14 1.9 ENVIRONMENTALLY SUPERIOR ALTERNATIVE...............................................1-14 1.9.1 M&O Facility ...........................................................................................................1-15 1.9.2 Other Project Refinements ....................................................................................1-15 1.10 PERMITS AND APPROVALS ...........................................................................................1-16 CHAPTER 2. INTRODUCTION .....................................................................................2-1 2.1 PURPOSE OF THE SUPPLEMENTAL ENVIRONMENTAL IMPACT REPORT (EIR)............................................................................................................................................ 2-1 2.1.1 Changes since the 2007 Final EIR .......................................................................... 2-1 2.1.2 Statutory Requirements for a SEIR ........................................................................ 2-2 2.1.3 Related Environmental Documents ....................................................................... 2-3 2.2 THE CEQA ENVIRONMENTAL REVIEW PROCESS............................................... 2-3 2.3 SEIR ORGANIZATION ....................................................................................................... 2-4 2.4 TECHNICAL STUDIES AND REPORTS USED IN THE SEIR................................ 2-5 CHAPTER 3. PROJECT DESCRIPTION........................................................................3-1 3.1 INTRODUCTION .................................................................................................................. 3-1 3.2 PROJECT OBJECTIVES ....................................................................................................... 3-2 3.3 REGIONAL PROJECT LOCATION AND SETTING ................................................. 3-2 3.4 PROJECT REFINEMENTS AND CONSTRUCTION ACTIVITY ANALYZED IN THE SEIR.................................................................................................................................. 3-5 3.4.1 Project Refinements.................................................................................................. 3-5 3.4.2 Construction Activity and Schedule .....................................................................3-28 3.5 RESPONSIBLE AND TRUSTEE AGENCIES..............................................................3-31 Metro Gold Line Foothill Extension–M&O Facility SEIR Page i September 2010 TABLE OF CONTENTS Topic Page CHAPTER 4. ENVIRONMENTAL EVALUATION ................................................... 4.1-1 4.1 AESTHETICS........................................................................................................................4.1-1 4.1.1 Methodology and Definitions...............................................................................4.1-1 4.1.2 Regulatory Framework ..........................................................................................4.1-4 4.1.3 Existing Conditions................................................................................................4.1-4 4.1.4 Environmental Impacts.......................................................................................4.1-12 4.1.5 Mitigation Measures .............................................................................................4.1-17 4.1.6 Impact Results with Mitigation...........................................................................4.1-18 4.2 LAND USE.............................................................................................................................4.2-1 4.2.1 Methodology and Definitions...............................................................................4.2-1 4.2.2 Regulatory Framework ..........................................................................................4.2-1 4.2.3 Existing Conditions..............................................................................................4.2-12 4.2.4 Environmental Impacts.......................................................................................4.2-14 4.2.5 Mitigation Measures .............................................................................................4.2-15 4.2.6 Impact Results with Mitigation...........................................................................4.2-15 4.3 POPULATION AND HOUSING ....................................................................................4.3-1 4.3.1 Methodology and Definitions...............................................................................4.3-1 4.3.2 Regulatory Framework ..........................................................................................4.3-1 4.3.3 Existing Conditions................................................................................................4.3-1 4.3.4 Environmental Impacts.........................................................................................4.3-3 4.3.5 Mitigation Measures ...............................................................................................4.3-4 4.3.6 Impact Results with Mitigation.............................................................................4.3-4 4.4 TRANSPORTATION AND TRAFFIC ...........................................................................4.4-1 4.4.1 Methodology and Definition ................................................................................4.4-1 4.4.2 Regulatory Framework ..........................................................................................4.4-5 4.4.3 Existing Condition .................................................................................................4.4-6 4.4.4 Environmental Impacts.........................................................................................4.4-7 4.4.5 Mitigation Measures .............................................................................................4.4-27 4.4.6 Impact Results with Mitigation...........................................................................4.4-27 4.5 CULTURAL RESOURCES.................................................................................................4.5-1 4.5.1 Methodology and Definitions...............................................................................4.5-1 4.5.2 Regulatory Framework ..........................................................................................4.5-3 4.5.3 Existing Conditions................................................................................................4.5-3 4.5.4 Environmental Impacts.........................................................................................4.5-7 4.5.5 Mitigation Measure...............................................................................................4.5-10 4.5.6 Impact Results with Mitigation...........................................................................4.5-11 4.6 HAZARDS AND HAZARDOUS MATERIALS ...........................................................4.6-1 4.6.1 Methodology and Definitions...............................................................................4.6-1 4.6.2 Regulatory Framework ..........................................................................................4.6-1 4.6.3 Existing Conditions................................................................................................4.6-1 Metro Gold Line Foothill Extension–M&O Facility SEIR Page ii September 2010 TABLE OF CONTENTS Topic Page 4.6.4 Environmental Impacts.........................................................................................4.6-7 4.6.5 Mitigation Measures .............................................................................................4.6-10 4.6.6 Impact Results with Mitigation...........................................................................4.6-11 4.7 PUBLIC SERVICES AND FACILITIES.........................................................................4.7-1 4.7.1 Methodology and Definitions...............................................................................4.7-1 4.7.2 Regulatory Compliance..........................................................................................4.7-1 4.7.3 Existing Conditions................................................................................................4.7-1 4.7.4 Environmental Impacts.........................................................................................4.7-5