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Analysis Oak Trees Along the western boundary of the site are twelve Heritage Oak Trees and four Native Oak Trees. Development Title Section 9-110.4 defines a Heritage oak tree as a native oak tree that has a single trunk diameter of thirty-two (32) inches or greater measured at four and one-half (4'/z) feet above the average ground elevation of the tree. A native oak tree is defined as a valley oak (Quercus lobata) with a trunk diameter of six (6) inches to less than thirty-two (32) inches for a single trunk tree, or a combined trunk diameter of eight (8) inches or greater for a multi-trunk tree, measured four and one-half(4'/) feet above the average ground elevation of the tree, or an interior live oak (Quercus wislizenii), California live oak (Quercus agrifolia), or blue oak (Quercus douglasii) with a trunk diameter of four (4) inches to less than thirty-two (32) inches for a single trunk tree, or a combined trunk diameter of six (6) inches or greater for a multi-trunk tree, measured four and one-half(4%) feet above the average ground elevation of the tree. To protect and preserve heritage oak trees and native oak trees from development and construction activity, certain standards contained in Development Title Section 9-1505 shall be applicable to grade changes near or within the drip line of said oak trees. No grade changes shall occur within six (6) feet of the trunk of the tree. No grade changes shall occur that entail removing or adding more than six (6) inches of soil in the protected zone of the tree. Any grade changes within the protected zone of tree shall be accomplished so as to prevent soil compaction and injury to or removal of the tree's roots. Before grading operations may commence, a minimum five (5) foot high chain link fence or other comparable protective fencing shall be installed at the outermost edge of the protected zone of each tree or group of trees. No trenching whatsoever shall be.allowed within the protected zone of subject trees and paving within the drip line of affected trees shall be minimized. If paving is necessary, porous materials shall be used. (Development Title Section 9-1505.5). Furthermore, the applicant will be required to comply with the Trees Chapter of the.Development Title Section 9-1505. If the applicant chooses to remove any oak tree, he must apply for an improvement plan and meet the tree removal requirements of the Development Title. Noise Development Title Section 9-1025.9 lists the Residential use type as a noise sensitive land use. Moreover, Development Title Section 9-1025.9(d) states that the Review Authority shall require the.preparation of an acoustical study in instances where it has determined that a project may expose existing or proposed noise sensitive land uses to,noise levels exceeding the noise standards specified in Table 9-1025.9. Due to the proximity of the project to State Route 99 W. Frontage Road, an acoustical study was required. In January 2006, the applicant submitted a Noise Study prepared by The Acoustics & Vibration Group. The study identified potentially significant noise impacts from State Route 99 W. Frontage Road and provided mitigation measures to reduce these impacts to a less than significant level. The mitigation measures include the following and will be added as a condition of approval to the project: • A sound wall made of the combination of earth berm and solid structure shall be built along the eastern property lines of Parcels 1, 2, and 8. A minimum wall height of 12 feet shall be used starting at the north end of Parcel 1. The wall height shall increase to a minimum of 13 5 feet at a point across from the on-ramp to southbound SR 99. The wall shall wrap around the entrance to the project approximately 30 feet. A minimum wall height of 15 feet shall be used starting at the north end of ,Parcel 8 and continue along the eastern property line to the south end (see the January 2006 Acoustical Study prepared by The Acoustics &Vibration Group). San Joaquin County' PA-0500329/Champion Community Development Page 3