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PDFWAC 173-58-020


As used in this chapter, unless the context clearly indicates otherwise:
(1) "Background sound level" means the level of all sounds in a given environment, independent of the specific source being measured.
(2) "dBA" means the sound pressure level in decibels measured using the "A" weighting network on a sound level meter.
(3) "Department" means the department of ecology.
(4) "Director" means the director of the department of ecology.
(5) "EDNA" means the environmental designation for noise abatement, being an area or zone (environment) within which maximum permissible noise levels are established.
(6) "Impulse sound" means either a single pressure peak or a single burst of multiple pressure peaks which occur for a duration of less than one second as measured on a peak unweighted sound level meter.
(7) "Local government" means county or city government or any combination of the two.
(8) "Noise" means the intensity, duration and character of sounds, from any and all sources.
(9) "Operator" means any person who is in actual physical or electronic control of a motor vehicle, aircraft, off highway vehicle, or any other engine driven vehicle.
(10) "Person" means any individual, corporation, partnership, association, governmental body, state agency, or other entity whatsoever.
(11) "Property boundary" means the surveyed line at ground surface, which separates the real property owned, rented, or leased by one or more persons, from that owned, rented, or leased by one or more other persons, and its vertical extension.
(12) "Racing event" means any motor vehicle competition conducted under a permit issued by a governmental authority having jurisdiction or, if such permit is not required, then under the auspices of a recognized sanctioning body.
(13) "Receiving property" means real property within which the maximum permissible noise levels specified in WAC 173-60-040 shall not be exceeded from sources outside such property.
(14) "Shoreline" means the existing intersection of water with the ground surface or with any permanent, shore-connected facility.
(15) "Sound level meter" means a device or combination of devices which measures sound pressure levels and conforms to Type 1, Type 2, or Type 3 standards as specified in the American National Standards Institute Specification S1.4-1971. An impulse sound level meter shall be a peak or impulse, unweighted sound level meter which is capable of measuring impulse sound in conformance with the Type 1 or Type 2 specifications of ANSI S1.4-1971.
[Statutory Authority: Chapter 70.107 RCW. WSR 94-12-001 (Order 92-41), § 173-58-020, filed 5/18/94, effective 6/18/94; WSR 79-04-033 (Order DE 78-19), § 173-58-020, filed 3/22/79.]
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