COMPLIANCE INFO_FINAL INITIAL STUDY/MITIGATED NEGATIVE DECLARATION 5/25

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Construction Vibration Calculations for Potential Disturbance Residential Institutional Residential Institutional Unit VdB VdB VdB feet feet Large bulldozer 87 80 83 25 43 34 Loaded trucks 86 80 83 25 40 31 Small bulldozer 58 80 83 25 5 4 Notes: Buffer distance to vibration threshold for human annoyance calculated based on the following equation:3 D2 = D1 * 10^ ((RMS1 - RMS2) / 30) Where: RMS1 = Vibration level at reference distance RMS2 = Vibration threshold for human disturbance D1 = Reference distance D2 = Buffer distance to vibration threshold for human annoyance Construction Vibration Calculations for Potential Building Damage Equipment1 Typical Vibration Level @ 25 Feet2 (PPV1) Building Damage Vibration Threshold (PPV2) Reference Distance (D1) Buffer Distance to Damage Threshold (D2) Unit in/sec in/sec feet feet Large bulldozer 0.089 0.3 25 11 Loaded trucks 0.076 0.3 25 10 Small bulldozer 0.003 0.3 25 1 Notes: Buffer distance to vibration threshold for building damage calculated based on the following equation:3 D2 = (PPV1 / PPV2)^ (1 / 1.5) * D1 Where: PPV1 = Vibration level at reference distance PPV2 = Vibration threshold for building damage D1 = Reference distance D2 = Buffer distance to vibration threshold for building damage 1 Demolition equipment provided by project applicant, and other equipment based on the CalEEMod default generated for the project. Only equipment that generates substantial vibration is shown. 2 Federal Transit Administration, 2018. Transit Noise and Vibration Impact Assessment Manual, Table 7-4. September. 3 Federal Transit Administration, 2018. Transit Noise and Vibration Impact Assessment Manual, Equations 7-2 and 7-3. September. Equipment1 Typical Vibration Level @ 25 Feet2 (RMS1) Annoyance Vibration Threshold (RMS2) Reference Distance (D1) Buffer Distance to Annoyance Threshold (D2) 21202-23 Noise Cal PS Page 1 of 1