Unless a different meaning is clearly required by context, words and phrases used in this chapter shall have the following meanings; general terms common with other chapters of Title 173
WAC as defined in chapter 173-403
WAC, and terms specific to standards for sulfur oxide as follows:
"Period" means any interval of the specified time.
[Statutory Authority: Chapter 70.94 RCW. 87-20-020 (Order 87-22), § 173-474-030, filed 9/30/87.]