1. Sounds originating from residential property as a result of 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;

6. Sounds created by the discharge of legal fireworks are exempt from this Chapter only during the specific days, times, and in the locations where discharge is allowable pursuant to existing state and local law (e.g., PCC 17C.60.230);

7. Sounds originating from temporary, non-residential construction sites as a result of construction activity are exempt from this Chapter (although they are not similarly exempted from Chapter 8.76 PCC);

8. Sounds originating from forestry activities (although they are not similarly exempted from Chapter 8.76 PCC).

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

2. Sounds 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 Tacoma-Pierce County Health Department.

3. Sounds commonly associated with an existing commercial operation which has been approved through a public hearing process and is operating in compliance with any permit conditions;

4. Sounds commonly associated with an existing commercial operation which was established prior to the effective date of any land use regulation(s) and is thereby non-conforming;

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

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

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

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

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

10. Sounds originating from motor vehicle or motorcycle racing events at existing authorized facilities, or being sanctioned by a responsible authority under valid permit or license;

11. Sounds originating from officially-sanctioned parades and other public events under valid permit or license;

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

13. Sounds created by the discharge of firearms in the course of hunting.