SU0004916 - Laserfiche WebLink

Home Browse Search

occupancy of the first residence under the College Park project,this mitigation measure shall not require implementation.This mitigation shall be funded through fair-share payments by the College Park developers. Implementation of the above mitigation measure would reduce project traffic noise impacts on existing sensitive noise receptors to a less-than-significant level. The College Park developers shall provide a 7-foot sound barrier on the south side of Grant Line Road at Grant Line Village before issuance of the first occupancy permit for development under the College Park Specific Plan to mitigate the project's combination to cumulative impacts.The sound barrier may consist of a wall,berm,or combination thereof.The sound barrier shall reduce outdoor noise levels at the center of the front yards of the Grant Line Village residences to below 65 dBA Ld/CNEL.The sound barrier shall be developed in conjunction with the Grant Line Road widening and Grant Line frontage road proposed as part of the College Park project. This mitigation shall be funded through fair-share payments by the College Park developers. IMPACT Noise—compatibility of Proposed Land Uses Exceeding Predicted Noise Levels. The proposed project 4.13-4 would result in the development of noise-sensitive land uses(residential)in an area where predicted noise levels would exceed land use compatibility noise standards established by the San Joaquin County General .. Plan 2010 and MHMP.A significant impact would occur. Noise levels in the College Park project site would be influenced by noise from: traffic on arterial streets; ► traffic on I-205; ► aircraft from Byron Airport; agricultural operations; and noise from commercial/industrial uses. The compatibility of the proposed noise-sensitive land uses(e.g.,residential, schools)with the predicted on-site noise levels is evaluated below. Traffic Noise—Arterials Predicted traffic noise levels were calculated for the seven arterial roadway segments in and adjacent to the College Park site under future buildout conditions(2025)using the FHWA Traffic Noise Prediction Model Input data used in the model included average daily traffic levels for nearby area roads,day/night percentages of autos and medium and heavy trucks, vehicle speeds,ground attenuation factors,and road widths.Input information was based on the traffic analyses prepared for the project(see Section 4.11,"Transportation")(TJKM 2004).Predicted traffic noise levels under future buildout conditions(2025)are presented in Table 4.13-11. Future traffic noise levels were not modeled along Mascot Boulevard,Byron Road, or the segment of Mountain House Parkway north of the project site because these roadways are not adjacent to the project site. Under the College Park project,the back yards of new single-family residences would be located along the existing arterial roadway segments adjacent to the College Park site as well as proposed arterial roadway segments on the College Park site,a distance of approximately 50 feet from the centerline of the near travel lane. As shown in Table 4.13-11,predicted traffic noise levels at this distance along all seven roadway segments would exceed the 60-dBA L&threshold of the MHMP without sound walls.Table 4.13-11 also shows that sound levels could be reduced if 7-foot-high sound walls were built to protect residential areas. 4 Traffic noise impacts on existing noise-sensitive uses are determined based on existing traffic conditions with and without implementation of the proposed project.This is compared with traffic noise impacts on proposed noise-sensitive uses that are determined based on cumulative traffic conditions with and without implementation of the proposed project. College Park at Mountain House Specific Plan III Draft EIR EDAW San Joaquin County 4.13-25 Noise