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3. <br />Construction of sound barriers in front of the residences <br />fronting on Bristol Street would restrict pedestrian or <br />vehicular access and consequently are not proposed at these <br />ll.ocatons <br />. <br />4. <br />The construction of sound barriers adjacent to school play- <br />grounds and athletic fields would meet federal exterior <br />noise criteria for outdoor activity areas. <br />5._ <br />Future design year noise levels could be reduced to meet <br />federal criteria if a six -foot noise wall is constructed to <br />shield those rear yard areas of units with side yards and <br />rear yards facing Bristol Street as shown in the Appendix. <br />5. <br />Six -foot block walls should be constructed at second line <br />receptor residential, lots that exceed 67 Leq (see the Appen- <br />dix) to reduce exterior noise to acceptable levels. <br />e <br />R <br />1 -5 <br />