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Hana Japan Restaurant Project <br />Initial Study/Mitigated Negative Declaration <br />64 <br />May 2025 <br />The primary vibration-generating activities associated with the proposed project would <br />occur during building construction. Table 9 shows the typical vibration levels produced by <br />construction equipment at various distances. As shown in the table, the most substantial <br />source of groundborne vibrations associated with project construction would be the use of <br />vibratory compactors during construction of the proposed parking areas within the project <br />site; however, the nearest sensitive receptor is located approximately 180 feet from the <br />nearest area where construction would occur within the project site and approximately 140 <br />feet from the proposed off-site improvements. Thus, groundborne vibration would be <br />below the 0.10 in/sec PPV threshold established by Caltrans for annoyance to sensitive <br />receptors, as well as the 0.20 in/sec PPV threshold established by Caltrans for building <br />damage. <br /> <br />Table 7 <br />Effects of Vibration on People and Buildings <br />PPV <br />Human Reaction Effect on Buildings mm/sec in/sec <br />0.15 to <br />0.30 <br />0.006 to <br />0.019 <br />Threshold of perception; <br />possibility of intrusion <br />Vibrations unlikely to cause damage <br />of any type <br />2.0 0.08 Vibrations readily perceptible <br />Recommended upper level of the <br />vibration to which ruins and ancient <br />monuments should be subjected <br />2.5 0.10 Level at which continuous <br />vibrations begin to annoy people <br />Virtually no risk of “architectural” <br />damage to normal buildings <br />5.0 0.20 <br />Vibrations annoying to people in <br />buildings (this agrees with the <br />levels established for people <br />standing on bridges and <br />subjected to relative short periods <br />of vibrations) <br />Threshold at which there is a risk of <br />“architectural” damage to normal <br />dwelling - houses with plastered <br />walls and ceilings. Special types of <br />finish such as lining of walls, flexible <br />ceiling treatment, etc., would <br />minimize “architectural” damage <br />10 to 15 0.4 to 0.6 <br />Vibrations considered unpleasant <br />by people subjected to <br />continuous vibrations and <br />unacceptable to some people <br />walking on bridges <br />Vibrations at a greater level than <br />normally expected from traffic, but <br />would cause “architectural” damage <br />and possibly minor structural <br />damage <br />Source: Caltrans. Transportation Related Earthborne Vibrations. TAV-02-01-R9601. February 20, 2002. <br /> <br />Table 8 <br />Vibration Levels for Various Construction Equipment <br />Type of Equipment PPV at 25 feet (in/sec) PPV at 50 feet (in/sec) <br />Large Bulldozer 0.089 0.029 <br />Loaded Trucks 0.076 0.025 <br />Small Bulldozer 0.003 0.000 <br />Auger/drill Rigs 0.089 0.029 <br />Jackhammer 0.035 0.011 <br />Vibratory Hammer 0.070 0.023 <br />Vibratory Compactor/roller 0.210 0.070 <br />Source: Federal Transit Administration, Transit Noise and Vibration Impact Assessment Guidelines, <br />May 2006. <br /> <br />Based on the above, the proposed project would not expose people to or generate <br />excessive groundborne vibration or groundborne noise levels, and a less-than- <br />significant impact would occur.