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stationary-source noise would not result in the exposure of persons to or generation of noise levels in excess of <br /> applicable standards or create a substantial permanent increase in ambient noise levels in the project vicinity. As a <br /> result,this impact would be less than significant. <br /> IMPACT Noise—Compatibility of Proposed Land Uses with On-site Noise Levels. Project implementation would <br /> 4.4-4 not result in the exposure of any sensitive receptors,proposed as part of the project, or any people working <br /> in the area to noise levels that exceed applicable City or County standards, including aircraft-generated <br /> noise levels.As a result, this impact would be less than significant. <br /> Implementation of the proposed project would not result in the development of any noise-sensitive land uses (e.g., <br /> residential) or result in a different land use type than what currently exists at the project site. In addition,the <br /> proposed project site would not be located within 2 miles of an airport land use plan or in the vicinity of a public <br /> or private airport, as the nearest airport to the WQCF is the Stockton Metropolitan Airport located approximately <br /> 6.5 miles to the north. Thus,project implementation would not result in the exposure of any sensitive receptors, <br /> proposed as part of the project, or any people working in the area to noise levels that exceed applicable City or <br /> County standards, including aircraft-generated noise levels. As a result,this impact would be less than <br /> significant. <br /> IMPACT Noise—Exposure of Sensitive Receptors to or Generation of Excessive Groundborne Vibration or <br /> 4.4-5 Noise Levels. Short-term project-generated vibration levels from construction sources could exceed FTA's <br /> maximum-acceptable vibration standard of 80 VdB with respect to human response for residential use at <br /> vibration-sensitive land uses.As a result, this impact would be significant. <br /> The long-term operation of the proposed project would not include any vibration sources. However, construction <br /> activities have the potential to result in varying degrees of temporary ground vibration, depending on the specific <br /> construction equipment used and operations involved. Vibration generated by construction equipment spreads <br /> through the ground and diminishes in magnitude with increases in distance. Table 4.4-10 displays vibration levels <br /> for typical construction equipment that may be used on the proposed project. <br /> Table 4.4-10 <br /> Vibration Source for Typical Construction Equipment <br /> Equipment PPV at 25 feet(in/sec)' Approximate Lv at 25 feet(Vdb)2 <br /> Large Bulldozer 0.089 87 <br /> Hoe Ram 0.089 87 <br /> Loaded Trucks 0.076 86 <br /> Jackhammer 0.035 79 <br /> Small Bulldozer 0.003 58 <br /> 'Where PPV is the peak particle velocity. <br /> 2 Where Lv is the velocity level in decibels(VdB)and based on the root mean square(RMS)velocity amplitude. <br /> Source:FTA 2006 <br /> For the WQCF,the required construction equipment would likely include trucks and bulldozers, as discussed <br /> above. According to FTA,vibration levels associated with the use of such equipment would be approximately <br /> 0.089 in/sec PPV and 87 VdB (referenced to 1 µin/sec and based on the RMS velocity amplitude)at 25 feet, as <br /> shown in Table 4.4-10.Using FTA's recommended procedure for applying a propagation adjustment to these <br /> reference levels,predicted worst-case vibration levels would exceed 0.2 in/sec PPV(Caltrans's recommended <br /> standard with respect to the prevention of structural damage for normal buildings)within 15 feet and 80 VdB <br /> EDAW Manteca WQCF and Collection System Master Plans EIR <br /> Noise 4.4-20 City of Manteca <br />