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<br />Soil Investigations for Data Collection in the Delta <br />Initial Study/Proposed Mitigated Negative Declaration 18 <br />mild vibrations can typically be felt by people within approximately 50 feet of the <br />EnviroVibe Minibuggy; at 100 feet, vibrations are typically not detectible by people. The <br />levels of vibration are much smaller than vibrations required to induce damage in <br />buildings and infrastructure. <br /> <br /> <br />*Source: Industrial Vehicles International 2019 <br />Figure 10. EnviroVibe Minibuggy <br />2.2 Over-Water Boring Equipment <br />Primary equipment for over-water boring includes a rotary drill rig mounted on a <br />shallow-draft barge or ship (see Figure 11). Vehicle use for over-water explorations will <br />include up to 8 passenger vehicles for workers and monitors to the marinas, power boat <br />for transport of workers and monitors to the drill barge or ship, and transport of the drill <br />barge (with a tugboat) or ship from the marina to the on-water exploration site.