AgdaPkt 2010-01-25 clsd and regular

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6.2A Page 47 3: Willow Street to Central Avenue to Cherry Street to Mowry Avenue to 1-880; or Route 4: Willow Street to Thornton A venue to Cherry Street to Mowry Avenue to 1-880. All routes would increase truck traffic on streets with adjacent residential uses. The City of Newark limits truck noise to 75 dBA at 50-feet. Because truck noise levels generated by Project- related traffic will exceed the 75 dBA criterion, truck noise levels would be significant. Trucking operations at speeds typical of traffic along roadways produces noise levels exceeding 75 dBA. This is a significant impact, which will exceed the City's standard and no mitigation is available. Therefore, it is significant and unavoidable. Impact NOI-3a. Trenchless construction requiring sheet pile driving within 60 feet of buildings could generate excessive ground-borne vibration, resulting in cosmetic damage to buildings. Some street and waterway crossings may be completed by trenchless construction methods such as jack-and-bore tunneling or microtunneling. Sheet piles may be required to shore the jacking pits. The sheet piles could be driven with vibratory or impact methods. "Worst case" vibratory sheet-pile driving could produce vibration amplitudes with the potential to cause cosmetic damage at distances within 60 feet (threshold of 0.2 in/sec PPV). . Mitigation Measures NOI-3a, NOI-3b, NOl-3e, and NO/-3d: Preparation and implementation of a vibration reduction plan, including avoiding pile driving within 60 feet and other vibratory machinery within 26 feet adjacent to sensitive receptors, and pre- drilling of piling holes, and monitoring. . Mitigation Measure NOI-3e: Outreach and education. Although implementation of Mitigation Measures NOI-3a, NOI-3b, NOI-3c, NOI-3d, and NOI- 3e could potentially reduce ground-borne vibration impacts from the installation of piles to less- than-significant levels, if pile driving and vibratory construction cannot be controlled to these thresholds, vibration levels could exceed the significance threshold and this vibration impact would remain significant and unavoidable. Impact NOI-3b. Non-impact (i.e., continuous) vibratory construction equipment within 26 feet of buildings could generate excessive groundborne vibration, resulting in cosmetic or structural damage to buildings. . Mitigation Measures NOI-3a, NOI-3b, NOI-3c, and NO/-3d: Preparation and implementation of a vibration reduction plan, including avoiding pile driving within 60 feet and other vibratory machinery within 26 feet adjacent to sensitive receptors, and pre- drilling of piling holes, and monitoring. . Mitigation Measure NOI-3e: Outreach and education. Implementation of Mitigation Measures NOI-3a, NOI-3b, NOI-3c, NOI-3d, and NOI-3e could ... .. ...: potentiaI1Y.rediice:the..poteritiargr()urid~boriie.vibratioldriipactS.from:.gerieraFconstriiction::: :............ vibration to less-than-significant levels; however, if vibratory equipment located within 26 feet of sensitive receptors cannot be avoided, vibration levels could exceed the significance threshold and this vibration impact could remain significant and unavoidable. Impact NOI-3c. Truck traffic and heavy equipment activities during nighttime construction work would potentially generate vibration levels that could disturb people. Nighttinle construction activities are proposed where the Project would cross Middlefield Road, EI Camino Real and Edgewood Road, where the Project would cross the Union Pacific Rail Road (UPRR) near Pacific and Calvin Streets, and potentially others. The movements of heavy 37