Laserfiche WebLink
<br /> <br /> <br />Memorandum <br />February 26, 2025 <br />Page 12 <br />21202-23 North County Landfill_Noise DRAFT <br />manner of operation. Therefore, the project vibration impacts are substantially similar to the <br />existing condition. <br />According to the FTA,10 typical vibration levels generated by a large bulldozer and loaded trucks <br />at 25 feet would be 0.089 inch per second (87 VdB) and 0.076 inch per second (86 VdB), <br />respectively. For potential building damage, the vibration levels generated by a large bulldozer <br />and loaded trucks at 25 feet are both below the applicable criteria of 0.2 inch per second <br />recommended by the FTA to prevent damage to structures to non-engineered timber and <br />masonry buildings. Therefore, project operation activities would not generate excessive <br />vibration levels that could potentially cause structure damages. <br />For human disturbance, a large bulldozer would require a larger buffer distance to avoid <br />generating vibration levels that could potentially cause human disturbance compared to loaded <br />trucks. Vibration from a large bulldozer could exceed the 80-VdB FTA thresholds at residences <br />and the 83-VdB FTA threshold at institutional land uses located within 43 feet and 34 feet, <br />respectively (vibration calculations are provided in Attachment A). Since the nearest vibration- <br />sensitive receptor to the project site is located about 2,750 feet from the equipment activity <br />area and the nearest vibration-sensitive receptor along haul route is located about 65 feet from <br />the centerline of the road, project operation activities would not generate excessive vibration <br />levels that could potentially cause human disturbance. <br /> <br /> <br /> <br />10 FTA, 2018. Transit Noise and Vibration Impact Assessment Manual, FTA Report No.0123, September.