2005 Washington Revised Code RCW 53.54.020: Investigation and monitoring of noise impact — Programs to conform to needs — "Impacted areas."

Prior to initiating programs as authorized in this chapter, the port commission shall undertake the investigation and monitoring of aircraft noise impact to determine the nature and extent of the impact. The port commission shall adopt a program of noise impact abatement based upon the investigations and as amended periodically to conform to needs demonstrated by the monitoring programs: PROVIDED, That in no case may the port district undertake any of the programs of this chapter in an area which is more than six miles beyond the paved end of any runway or more than one mile from the centerline of any runway or from an imaginary runway centerline extending six miles from the paved end of such runway. Such areas as determined above, shall be known as "impacted areas".

[1984 c 193 § 1; 1979 c 85 § 1; 1974 ex.s. c 121 § 2.]