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Page 2 <br /> <br />SCOPE OF WORK <br /> <br />The following tasks have been identified as the required components of <br />the proposed study. <br /> <br />1. Noise Measurements <br /> <br /> To determine existing noise levels along the roadway, we will <br /> perform four 24-hour noise measurements at various locations along <br /> the roadway. These measurements will be made at representative <br /> backyard elevations of homes along the roadway. Additionally, we <br /> will perform 15-minute spot measurements as necessary to quantify <br /> the noise level along the remaining segments of the roadway. <br /> <br /> These 15-minute spot measurements will be correlated with the <br /> 24-hour measurements so that the existing day/night level (Ldn) <br /> can be assessed along the entire length of the roadway. <br /> <br />2. ~nalVZe Pas~ Existinq, and Future Noise L.evels <br /> <br /> Based on past traffic information supplied by the City, we will <br /> determine the noise levels along Foothill Road subsequent to the <br /> completion of the West Las Positas overcrossing. Based on <br /> existing and future traffic volume data, we will estimate future <br /> noise levels along the roadway. The future noise projections will <br /> be based on 5, 10, and 20-year projections. <br /> <br /> <br />