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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 <br />Threshold of perception; possibility of <br />Vibrations unlikely to cause damage of <br />intrusion. <br />any type. <br />0,08 <br />Vibrations readily perceptible. <br />Recommended upper level of the <br />vibration to which ruins and ancient <br />monuments should be subjected. <br />0.10 <br />Level at which continuous vibrations <br />Virtually no risk of "architectural" <br />begin to annoy people. <br />damage to normal buildings. <br />0.20 <br />Vibrations annoying to people in <br />Threshold at which there is a risk of <br />buildings (this agrees with the levels <br />"architectural' damage to normal <br />established for people standing on <br />dwelling- houses with plastered walls <br />bridges and subjected to relative short <br />and ceilings; special types of finish such <br />periods of vibration), <br />as lining of walls, flexible ceiling <br />treatment, etc., would minimize <br />"architectural" damage. <br />0.4 -0.6 <br />Vibrations considered unpleasant by <br />Vibrations at a greater level than <br />people subjected to continuous <br />normally expected from traffic, but <br />vibrations and unacceptable to some <br />would cause "architectural' damage and <br />people walking on bridges, <br />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 <br />