SR 06:199 - Laserfiche WebLink

EXHIBIT "A" SCOPE OF WORK TASK 1: Document Existing Noise Conditions. A: A noise-rnonitoring program would be developed in close coordination with the City. Noise measurements would be made at 34 to 40 locations throughout the City. Noise measurements would be repeated at the 33 monitoring locations where noise measurements were made in 2002. Additional noise measurement locations would be selected based on consultation with City Staff to quantifY noise levels in developing areas or in areas that have been problematic in the past. Some recent issues in Pleasanton that our firm has worked with relate to "stationary" noise sources. These have included stand-by generators, wood-grinding operations, car washes, etc. Noise data will be gathered at significant stationary sources identified by City Staff. Noise levels would be monitored for a minirnurn of24 hours at each location, but noise monitoring would occur over longer durations and on weekends at selected locations. B&C: A data report would be presented in a similar format to our previous reports upon completion of the noise monitoring survey. The results of noise level monitoring at each location would be depicted graphically to show the daily trend in noise levels at each measurement site. Additionally, a brief description of the noise environment and picture of the noise monitoring location would be presented. A surmnary of all noise monitoring data would be tabularized and compared to previous noise measurements where applicable. A general discussion of noise levels throughout the City would also be presented. TASK 2: Produce Noise Exposure Contours. Future traffic noise level estimates would be made based upon the data collected during the noise monitoring survey and traffic data provided by the City. The noise exposure contours would be based on existing noise data, noise measurements, and noise modeling results. Our firm utilizes the Sound 32 / Sound 2000 and LEQV2 traffic noise models developed by Caltrans. The firm also uses the new Transportation Noise Model (TNM) developed by the Federal Highway Administration to supplement the modeling of complex freeway geornetries. These traffic noise models would be used to develop noise contour information for highways and freeways and primary arterials and major collector streets. We would prepare noise contour maps on base maps supplied to us by the City representing the predicted noise exposure for the City of Pleasanton. We prefer to prepare the contours using AutoCAD, if base map files that include roadway centerlines are available. AutoCAD files can be directly imported into a GIS database. Developing the noise contours in AutoCAD allows the City to generate maps at any scale and for selected portions of the community as they choose. We will prepare a future noise contour map in terms of Ldn in increments of 5 decibels down to 60 Ldn for the build-out of the General Plan. The noise contours would be prepared in an AutoCAD format or on a single base map. Data tables and a brief summary of the noise monitoring survey and methodologies used in noise modeling would accompany the maps for inclusion in an Appendix to the Noise Element.