Draft EA - San Diego International Airport

SAN DIEGO INTERNATIONAL AIRPORT – PROPOSED RUNWAY 9 DISPLACED THRESHOLD
3.2.2.4 West of Airport
The former Naval Training Center (NTC) property, comprising approximately 541 acres, is located west of the
Airport on the west side of the Navy Boat Channel. The NTC site has been redeveloped as Liberty Station.
Uses include residential, commercial, office, recreational, educational, and civic uses. 11
3.2.3 EXISTING ZONING
Zoning for the City of San Diego is planned and mapped by the Development Services Department of the
City. 12
Generally, zoning in the immediate areas surrounding the Airport tend to be commercial or industrial in
use, which is consistent with the current land use for these areas.
Areas to the west of the Airport are currently zoned for commercial, residential, and open space uses.
Properties to the east and north of the Airport are zoned for commercial, residential, and industrial uses.
South of the Airport consists of CPAs that are not designated for specific uses. Within these broad zoning
designations are specific zones with distinct classifications and restrictions. These specific designations vary in
development intensity, the mix of uses, and types of uses allowed.
3.3 Noise
The FAA has developed specific guidance and requirements for the assessment of aircraft noise in order to
comply with NEPA requirements. The methodology to be used in conducting aircraft noise analyses is
established in FAA Order 1050.1E. The FAA has determined that the cumulative noise exposure of individuals
resulting from aircraft noise must be established in terms of the yearly day-night average sound level (DNL)
metric, but accepts the use of the CNEL for aircraft noise evaluations in California. 13
CNEL is the average noise level over a 24-hour period with a 5 dB penalty applied to evening operations (i.e.,
operations between 7 p.m. to 10 p.m.) and a 10 dB penalty applied to nighttime operations (i.e., operations
between 10 p.m. and 7 a.m.). The 5 dB and 10 dB increases during evening and nighttime hours, respectively,
are intended to account for the added intrusiveness of aircraft noise during time periods when ambient noise
due to vehicle traffic and other sources is typically less than during the daytime. CNEL is similar to DNL;
however DNL does not add a 5-dB penalty to evening operations.
11
12
13
City of San Diego, Naval Training Center Overview, http://www.sandiego.gov/ntc/overview/index.shtml, (accessed: December 20, 2011).
Development Services Department, City of San Diego, Official Zoning Map, http://www.sandiego.gov/ developmentservices/zoning/zoninggridmap.shtml,
(accessed: December 12, 2011).
The FAA definition of "significance" is specified using the day-night average sound level (DNL) metric. The FAA recognizes the use of the
Community Noise Equivalent Level (CNEL) for aircraft noise evaluations in California. See FAA Order 1050.1E, Appendix A, Section 14 for
FAA’s acceptance of CNEL as a suitable substitute for DNL.
Affected Environment
[3-10]
Draft EA