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ter 7. Future Noise Environment, Impacts, and Considered Abatement One noise barrier (Noise Barrier [NB] No. 1) was modeled along the private property line on the northbound side of Fairview Street to shield this residence. • Receptor R-8: This receptor location represents an existing single-family residence on the southbound side of Fairview Street between Civic Center Drive and West 9th Street. Currently, a 2.7 ft to 6 ft high existing wall shields this residence. One noise barrier (NB No. 2) was modeled along the private property line on the southbound side of Fairview Street to shield this residence. • Receptor R-14: This receptor location represents an existing single-family residence on the southbound side of Fairview Street between West 9th Street and West 12th Street. Currently, a 5.3 ft high existing wall shields this residence. One noise barrier (NB No. 3) was modeled along the private property line on the southbound side of Fairview Street to shield this residence. • Receptor R-23: This receptor location represents existing multifamily residences on the southbound side of Fairview Street between West 9th Street and West 12th Street. Existing wood fences along the private property line would not provide effective noise attenuation at these residences. One noise barrier (NB No. 4) was modeled along the private property line on the southbound side of Fairview Street to shield these residences. • Receptors R-24, R-25, and R-40: These receptor locations represent existing single-family residences on the northbound side of Fairview Street between West 9th Street and West 12th Street. Currently, a 4 ft to 6 ft high wall shields these residences. One noise barrier (NB No. 5) was modeled along the private property line on the northbound side of Fairview Street to shield these residences. • Receptor R-46: This receptor location represents an existing single-family residence on the southbound side of Fairview Street between West 12th Street and the Santa Ana River. Currently, a 5.7 ft high existing wall shields this residence. One noise barrier (NB No. 6) was modeled along the private property line on the southbound side of Fairview Street to shield this residence. • Receptor R-51: This receptor location represents a park on the southbound side of Fairview Street between West 12th Street and the Santa Ana River. Currently, no wall shields the park. Because there is driveway and pedestrian access onto Fairview Street, it is not feasible to abate traffic noise from Fairview Street with noise barriers. 7.2. Preliminary Noise Abatement Analysis Noise abatement is considered where noise impacts are predicted in areas of frequent human use that would benefit from a lowered noise level. According to 23 CFR 40 Fairview Street Improvements from 9th Street to 16th Street and Bridge Replacement Project Noise Study Report