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ESA 1.Approach and Scope of Work transfers),traction equipment(i.e.locomotives)idling simultaneously and pulling freight,off-road equipment,and on-road vehicles associated with project operations.The expanded Union Pacific facility would continue to operate 24-hours per day,seven days per week,every day of the year.The increased operations of the project could expose noise-sensitive receptors in g the proximity of the project to substantial increases in noise levels and in the frequency of noise events along the feeder rail lines to the site. Tasks i The scope of the analysis will include the following: i' i • ESA will summarize state and local noise policies,regulations, and standards, as they would pertain to development under the project. • WIA will identify the noise-sensitive land uses or activities in the vicinity of the project and determine the noise effects of the project on these uses or activities.Emphasis will be placed on the level of noise to be produced the various sources to be introduced by the project as well as the frequency(pitch)of such noise. • WIA will conduct short-term measurements of the various sources of noise in the present operation such as horns, alarms, freight car/trailer truck loadings and unioadings, cranes, idiling locomotives, etc. Briefly Thoroughly describe and discuss existing major noise sources at the project site. • Describe the existing noise environment on the basis of up to five ten long-term(7-day)measurements at key locations surrounding the facility and several-ten short-term(fifteen minute)measurements,as necessary carried out by ESA staff.These measurements will be conducted using instrumentation capable of registering the frequency content of the noise so as to allow a more detailed impact analysis than what is possible with standard A-weighted based instrumentation.The frequency information collected will, in turn, allow for,a determination of the degree of ` "masking" of facility-related noise which can be expected at the various noise sensitive land uses surrounding the site and the potential for adverse impacts which could result from future operations. • A computer noise model of the present and proposed future layout of the facility will be prepared using state-of-the-art software(SoundPlan or Cadna/A).This model will take into consideration'all major expected sources of noise at the facility as well as truck traffic serving it, allowing for an accurate determination of the expected benefits of potential mitigation measures and their optimization, should those be required. A worst-case scenario will be studied assuming adverse meteorological conditions such as temperature inversions and downwind receivers,both of which are common in the Central Valley. Vehicular noise will be modeled as per h'HWA guidelines and algorithms.The modeling effort will rely on GIS information of the area to be provided by San Joaquin County. i San Joaquin County—E1R for the Union Pacific Modemizafion Project 1-11