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City of Santa Clarita August 2017

Figure 6.4-12 Project Year 2035 Alternative 2 Intersection Configurations ..................................... 6.4-27

Tables

Table 1-1 Summary of Environmental Impacts and Mitigation Measures ...................................... 1-6
Table 2-1 Potential Property Acquisition and/or Easements .......................................................... 2-24
Table 4.2-1 Summary of Health Effects of Criteria Pollutants ........................................................ 4.2-5
Table 4.2-2 Modeled Air Toxics Risk Comparisons Using the CAMx Model ................................ 4.2-9
Table 4.2-3 Ambient Air Quality Standards .................................................................................. 4.2-11
Table 4.2-4 2012 Estimated Annual Average Emissions ............................................................... 4.2-15
Table 4.2-5 Summary of Ambient Air Quality in the Project Vicinity .......................................... 4.2-16
Table 4.2-6 Existing Carbon Monoxide Concentrations ................................................................ 4.2-17
Table 4.2-7 SCAQMD Air Quality Significance Thresholds ........................................................ 4.2-21
Table 4.2-8 Estimated Peak Daily Construction Emissions ........................................................... 4.2-24
Table 4.2-9 Project Consistency with Applicable Policies of the City’s General Plan
Air Quality Element .................................................................................................... 4.2-25
Table 4.2-10 Localized On-Site Peak Daily Construction Emissions .............................................. 4.2-28
Table 4.2-11 Existing Conditions Plus Project (2019) Carbon Monoxide Concentrations ............. 4.2-29
Table 4.2-12 Future Conditions Plus Project (2035) Carbon Monoxide Concentrations ................ 4.2-30
Table 4.5-1 Summary of LAFCD Water Well Data ........................................................................ 4.5-6
Table 4.5-2 Summary of Nearby Faults ........................................................................................... 4.5-8
Table 4.5-3 MCE Geometric Mean (MCE G) Peak Ground Accelerations (PGA M) ....................... 4.5-11
Table 4.6-1 Summary of Flood Flows ............................................................................................. 4.6-7
Table 4.7-1 Regional Transportation Plan/ Sustainable Communities Strategy Consistency
Analysis......................................................................................................................... 4.7-7
Table 4.7-2 City of Santa Clarita Circulation Element Consistency Analysis ............................... 4.7-10
Table 4.7-3 Placerita Canyon Special Standards District Consistency Analysis ........................... 4.7-18
Table 4.8.1 Representative Environmental Noise Levels ................................................................ 4.8-2
Table 4.8.2 Human Response to Different Levels of Groundborne Vibration ................................ 4.8-4
Table 4.8.3 City Ordinance Noise Limits ........................................................................................ 4.8-9
Table 4.8.4 Existing Noise Levels Measured at the Project Site Without Train Activity ............. 4.8-12
Table 4.8.5 Existing Noise Levels Measured at the Project Site With Train Activity .................. 4.8-12
Table 4.8.6 Existing Roadway Noise Levels at Off-Site Locations ............................................. 4.8-13
Table 4.8.7 Typical Outdoor Construction Noise Levels ............................................................. 4.8-16
Table 4.8.8 Noise Range of Typical Construction Equipment ..................................................... 4.8-16
Table 4.8.9 Estimated Exterior Construction Noise at Nearest Sensitive Receptors ..................... 4.8-17
Table 4.8.10 Vibration Source Levels for Construction Equipment ................................................ 4.8-18
Table 4.8.11 Future (2019) Project Roadway Noise Impacts at Off-Site Locations ....................... 4.8-19
Table 4.8.12 Estimated Roadway Noise at Nearest Sensitive Receptors ........................................ 4.8-20
Table 4.8-13 Future (2035) Project Roadway Noise Impacts at Off-Site Locations ....................... 4.8-22
Table 4.9-1 HCM 2010 – LOS Criteria for Signalized Intersections ............................................... 4.9-6
Table 4.9-2 HCM 2010 – LOS Criteria for TWSC, AWSC, and Roundabout Intersections ........... 4.9-6
Table 4.9-3 Intersection Capacity Analysis - Existing Conditions .................................................. 4.9-7
Table 4.9-4 Intersection Capacity Analysis – Year 2019 No-Build Condition .............................. 4.9-15

Lyons Avenue/Dockweiler Drive Extension Project Table of Contents
SCH No. 2013082016 Page iv