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City of Santa Ana Environmental Checklist <br />Table 3-17. Typical Vibration Levels for Construction Equipment <br />Approximate peak particle Approximate peak particle <br />velocity at 25 feet velocity at 50 feet <br />Equipment (inches/second) (inches/second) <br />Largebulldozer 0.089 0.032 <br />Loaded trucks <br />0.076 0.027 <br />Peak particle velocity measured at 25 feet unless noted othenvise. <br />Root mean square amplitude ground velocity in decibels (VdB) referenced to 1 micro-inch/second. <br />Source: Federal Transit Administration, Transit Noise and Vibration Impact Assessment Guidelines, May <br />Table 3-18. Response of People and Effects on Structures from Continuous Vibration <br />Peak Particle <br />Velocity (PPV) <br />Human <br />Effect on Structures <br />0.006-0.019 Threshold of perception; possibility of Vibrations unlikely to cause damage of <br /> intrusion. any type. <br />0,08 Vibrations readily perceptible. Recommended upper level of the <br /> vibration to which ruins and ancient <br /> monuments should be subjected. <br />0.10 Level at which continuous vibrations Virtually no risk of "architectural" <br /> begin to annoy people. damage to normal buildings. <br />0.20 Vibrations annoying to people in Threshold at which there is a risk of <br /> buildings (this agrees with the levels "architectural' damage to normal <br /> established for people standing on dwelling-houses with plastered walls <br /> bridges and subjected to relative short and ceilings; special types of finish such <br /> periods of vibration), as lining of walls, flexible ceiling <br /> treatment, etc., would minimize <br /> "architectural" damage. <br />0.4-0.6 Vibrations considered unpleasant by Vibrations at a greater level than <br /> people subjected to continuous normally expected from traffic, but <br /> vibrations and unacceptable to some would cause "architectural" damage and <br /> people walking on bridges, possibly minor structural damage. <br />Source: California Department of Transportation, Transportation- and Construction-Induced Vibration <br />Guidance Manual, 2004, <br />c. A substantial permanent increase in ambient noise levels in the project vicinity above levels <br />existing without the project? <br />Less-than-Significant Impact. As described in XI La, the proposed project would result in an <br />increase in traffic along the local roadway system and increases in noise related to project-related <br />HVAC equipment, and parking lot noise. As described previously, the anticipated noise increase from <br />these onsite noise sources would be minimal and would not result in a significant increase in <br />ambient noise levels. As a result, impacts are less than significant. <br />The Bat Nha Buddhist Meditation Center June 2013 <br />Initial Study/Mitigated Negative Declaration 3-75 ¢r 00215.12 <br />31 C-129