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7.1 MITIGATION MONITORING PROGRAM Noise Table 7.1 -continued Timing or Person/ Frequency Monitoring Agency of Impact Mitigation Measure Requirements Responsible' Monitoring' ■ NOISE 4.16-1 Residential development, schools, 4.16-1(a) The siting of residential or other noise-sensitive land uses Review at G-PA SP SJCCDD GRA SP and other noise-sensitive land uses adjacent to Interstate 205 should he avoided. Future stage. on the project site would be residences should be located outside the 65-L, freeway noise exposed to excessive noise levels, contour. especially in the area between Grant Line Road and I-205. 4.16-1(b) Locating noise-sensitive land uses as far as possible from Review at SP stage. SJCCDD SP major roadways is the preferable solution. When this is not feasible, or desirable, earth berms, or sound walls could be built between the noise source and the noise-impacted area. Typically, an earth berm provides 3 dB of additional noise attenuation over a sound wall of the same height. A sound wall at the top of an earth berm is more aesthetically pleasing than a sound wall of the same total height but, its performance to act as a noise barrier is inferior to an earth berm (Figure 4.16-3). Further noise level reductions to an I., of 60 dB could be achieved through proper site planning and building orientation, construction of earth berms or sound walls, or a combination of more than one of these methods. Site specific mitigation measures should be determined on a case-by-case basis. 4.16-1(c) Schools Should not be sited in areas exposed to noise levels Review at SP stage. S.LCCDD SP alxrvc an L,,,, of 60 dB. the land use plan should be revised to relocate two proposed high schools and three elementary schools. 4.16-1(d) At the time of the Specific Plan. acoustical studies should be Review at SP stage. SJCCDD SP required for noise-sensitive land uses proposed to be located in areas exposed to noise levels alxrvc an L& of 60 dB. Appropriate mitigation measures should be recommended in these studies and implemented by the appropriate party to ensure that the L. of 60 dB is not exceeded.