RES 06035 - Laserfiche WebLink

Chapter 5 Alternatives to the Project (2) ACE Train Station Alternative 2 would locate the ACE train station in sub-area 2. As noted in Chapter 4, Part J, Based on measurements made along the tracks, railroad operations are calculated to generate noise levels of about 63 to 69 dBA Ldn at a distance of 50 feet from the tracks, depending on the number of train passbys occurring over the course of the 24-hour period. Assuming a typical Ldn noise level of about 66 dBA Ldn at 50 feet from the tracks, noise levels would be about 65 dBA Ldn at approximately 60 feet from the tracks and about 60 dBA Ldn at approximately 120 feet from the tracks. Potential land uses to be located along the UPRR (sub-areas 2, 7, 8, 9, 10, and 16) include agricultural uses, open space areas, trails, and a water treatment marsh; an elementary school has already been built in sub-area 8. Noise sensitive outdoor uses would be consid- ered "normally acceptable" at a setback of 120 feet or greater from the tracks, trails and out- door recreational facilities such as tennis courts (sub-area 2) would be considered "normally acceptable" at a setback of 60 feet, and agricultural, open space, and industrial land uses (sub-areas 7, 9, 10, and 16) would be compatible at setback of30 feet. The Hearst Elementary School (sub-area 8) would be considered a noise-sensitive use. The school has been constructed and has been in operation for several years, so noise from train passbys on the U PRR tracks is part of the school's existing noise environment. What would change with the train station located in sub-area 2 is the noise of trains idling at the station. Noise levels at the school mayor may not increase, depending on the duration and number of trains anticipated to stop at the station. If Alternative 2 is selected for the Specific Plan, the potential for adverse impacts on the elementary school should be analyzed by a qualified acoustical consultant to determine whether adverse impacts relating to train idling might occur and, if so, to recommend suitable mitigation measures. k. Open Space The assessment of impacts on open space presented in Chapter 4 also applies to Alternatives 1 and 2. I. Population and Housing The assessment of impacts on population and housing presented in Chapter 4 also applies to Alternatives 1 and 2. m. Public Services The assessment of impacts on public services presented in Chapter 4 also applies to Alternatives 1 and 2. 177