WAC 173-475-020   Definitions.  (1) "Air quality standard" means an established concentration, exposure time, or frequency of occurrence of a contaminant or multiple contaminants in the ambient air which shall not be exceeded.

     (2) "Ambient air" means the surrounding outside air.

     (3) "Department" means the state department of ecology.

     (4) "National air monitoring stations (NAMS)" means fixed monitoring stations operated by the state and local air pollution control agencies to meet national monitoring objectives. The stations are a subset of the SLAMS network and are sited with emphasis on urban and multisource areas.

     (5) "State and local air monitoring stations (SLAMS)" means stations designed to meet any of four basic monitoring objectives:

     (a) To determine highest concentrations expected to occur;

     (b) To determine representative concentrations in areas of high population density;

     (c) To determine the impact on ambient air pollution levels of significant sources or source categories; and

     (d) To determine general background concentration levels.

     (6) "Special purpose monitoring stations (SPMS)" means monitoring stations operated by state and local air pollution control agencies to supplement the SLAMS network in order to increase the overall effectiveness of the state's monitoring efforts.



[Statutory Authority: RCW 43.21A.080, 70.94.331, 70.120.030, and 70.120.120. 80-03-071 (Order DE 79-36), § 173-475-020, filed 2/29/80. Formerly chapters 18-32 and 18-46 WAC (part).]