1. Sounds originating from residential property relating to temporary projects for the construction, maintenance or repair of homes, grounds and appurtenances;

2. Sounds created by the discharge of firearms on authorized shooting or firing ranges;

3. Sounds created by blasting;

4. Sounds created by aircraft engine testing and maintenance not related to flight operations, provided that aircraft testing and maintenance shall be conducted at remote sites whenever possible;

5. Sounds created by the installation or repair of essential utility services.

1. Noise from electrical substations and existing stationary equipment used in the conveyance of water or wastewater by a utility;

2. Noise from existing industrial installations which exceed the standards contained in these regulations and which, over the previous three years, have consistently operated in excess of 15 hours per day as a consequence of process necessity and/or demonstrated routine normal operation. Changes in working hours which would effect exemptions under this regulation require approval of the Noise Control Officer.

1. Sounds originating from temporary construction sites as a result of construction activity;

2. Sounds originating from forest harvesting and silvicultural activity.

1. Sounds created by motor vehicles when regulated by WAC Chapter 173-62;

2. Sounds originating from aircraft in flight and sounds that originate at airports which are directly related to flight operations;

3. Sounds created by surface carriers engaged in interstate commerce by railroad;

4. Sounds created by warning devices not operated continuously for more than five minutes or bells, chimes and carillons;

5. Sounds created by safety and protective devices where noise suppression could defeat the intent of the device, or is not economically feasible;

6. Sounds created by emergency equipment and work necessary in the interests of law enforcement or for health, safety or welfare of the community;

7. Sounds originating from motor vehicle or motorcycle racing events at existing authorized facilities, or being sanctioned by a responsible authority;

8. Sounds originating from officially sanctioned parades and other public events;

9. Sounds emitted from petroleum refinery boilers during startup of said boilers; provided, that the startup operation is performed during daytime hours whenever possible;

10. Sounds created by the discharge of firearms in the course of hunting;

11. Sounds caused by natural phenomena and unamplified human voices;

12. Animal noises which are already regulated;

13. Sounds created by motor vehicles, licensed or unlicensed, when operated off public highways except when such sounds are received in Class A EDNA's;

14. Sounds created by watercraft are excluded from this Chapter when regulated by Chapter 8.88 of this Code.