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Enforcement Agency: <br />Implementation /Monitoring Agency: <br />Monitoring Phase: <br />Monitoring Frequency: <br />Compliance Action: <br />City of Santa Ana <br />Registered Environmental Assessor /Department of <br />Toxic Substances Control <br />Pre - Construction <br />Once, prior to construction <br />Site Investigation and Submittal of the Phase I and <br />Phase II Environmental Site Assessments <br />Traffic and Parking <br />No mitigation measures related to traffic and parking are required. <br />Noise and Vibration <br />N1 The City of Santa Ana shall request a horn - sounding exemption from the California Public <br />Utilities Commission for the crossing at 5th and Fairview Streets. The exemption shall <br />provide justification and demonstrate that safety would not be compromised. In lieu of <br />the warning horn, supplemental safety measures (e.g., four -quad gates, roadway median <br />barriers on grade crossing approaches, and pedestrian gates) would be implemented. If a <br />horn sounding exemption is approved and established, warning horns would not be <br />sounded except under an emergency situation. <br />Enforcement Agency: <br />Implementation /Monitoring Agency: <br />Monitoring Phase: <br />Monitoring Frequency: <br />Compliance Action: <br />City of Santa Ana <br />City of Santa Ana /California Public Utilities <br />Commission <br />Design <br />During design and prior to operation <br />Agency request submission /Field Inspection <br />N2 When practical, the contractor shall design special trackwork elements, such as turn- <br />outs, switches, and cross -over to be located at least 600 feet away from sensitive <br />receptors. If this cannot be achieved, then special switch devices, such as spring frogs <br />or movable point frogs shall be utilized. A frog device is used where two rails cross. The <br />frog is designed to ensure the wheel crosses the gap in the rail without "dropping" into <br />the gap. <br />Enforcement Agency: City of Santa Ana <br />Implementation /Monitoring Agency: Contractor /City of Santa Ana <br />Monitoring Phase: Design <br />Monitoring Frequency: Prior to Approval of Final Plans and Specifications <br />Compliance Action: Field Verification of Installation of Trackwork <br />N3 The contractor shall construct a noise barrier at the land uses identified as Noise <br />Sensitive Areas 9 and 10. For receptors in Noise Sensitive Area 9, the noise barrier shall <br />be at least 10 feet high and extend for 400 feet along the northern property edge of the <br />proposed operations and maintenance facility. For receptors in Noise Sensitive Area 10, <br />the noise barrier shall be at least 8 feet high and extend for 225 feet along the southern <br />boundary of the PE ROW adjacent to 4`h Street. The design of the noise barriers shall be <br />identified on project plans prior to issuance of building permits. <br />Santa Ana Garden Grove Fixed Guideway Project REAIFEIR P a g el 237 <br />January 2015 <br />75A -54 <br />