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Section 5 <br />Table 81: Vibration Source Levels for Construction Equipment <br />Equipment <br />Peak Particle Vetocfty <br />(inches/seco2d) <br />Approximate Vibration Level <br />LV) at 25 feet <br />Pile driver (impact) <br />1.518 (upper range) <br />0.644 (typical) <br />112 <br />104 <br />Pile driver (sonic) <br />0.734 upper range <br />0.170 typical <br />105 <br />93 <br />Clam shcve0 drop (slurry wall) <br />0.202 <br />94 <br />Hydromill (slurry wT11_) <br />0,008 in sell <br />0.017 in rock <br />66 <br />75 <br />_V_ibf atory -Roller <br />0,210 <br />94 <br />Hoe Ram <br />0,089 <br />87 <br />Large bulldozer <br />0o89 <br />87 <br />Caisson drill <br />0.089 <br />87 <br />Loaded trucks <br />0.076 <br />86 <br />Jackhammer <br />0,035 <br />79 <br />Small bulldozer <br />0.003 <br />Source Transit Nuse and Vibration Irripact Assessopent, Federal Transit Admnistration, <br />May 2006 <br />Alternative 1. No Federal Action/No Project <br />Under Alternative 1, none of the construction activities Would occur. There would <br />be no potential that construction related vibration impacts could adversely impact <br />structures within the project area. <br />Alternative 2: Proposed Project <br />To estimate vibration impacts the Federal Transit Administration's ground-borne <br />vibration impact thresholds were used. A vibration impact will be considered <br />significant if it results in construction impact of 0.25 inch per second or an <br />operation impact of .04 inch per second. <br />Table 81 in provides a list of construction equipment and potential levels of <br />vibration. Of the equipment listed in Table 81, the caisson drill, which is similar to <br />a drill rig, would be the piece of equipment that wound be utilized by the Proposed <br />Project with the highest vibration level at 0,089 inch per second PPV at 25 feet. <br />The calculated vibration levels that would be created by a drill rig operating at <br />each well at the nearest sensitive receptor are shown in Table 82, <br />Mid Basin Centennial Park Injection Well Project Final EIR 5-215 <br />25C-316 <br />