WAC 173-422-095   Exhaust opacity testing equipment.  The exhaust opacity measurement shall be conducted using an opacity meter approved by the department.

     The opacity meter shall:

     (1) Automatically calibrates itself before each test.

     (2) Provide for continuous measurement of exhaust opacity unaffected by rain or wind.



[Statutory Authority: Chapter 70.120 RCW. 94-05-039 (Order 93-10), § 173-422-095, filed 2/8/94, effective 3/11/94; 93-10-062 (Order 91-46), § 173-422-095, filed 5/3/93, effective 6/3/93.]