Wash. Admin. Code § 308-15-057
You are eligible for a hydrogeologist license if you submit an application to the board, completed in accordance with WAC 308-15-030, which demonstrates that:
(3) You have completed and passed the requirements of advanced study pertinent to hydrogeology and acceptable to the board, as follows:
(4) You have five years of professional hydrogeology experience after completing and passing the advanced study requirements specified in subsection (3) of this section. At least three years of hydrogeology experience must be obtained under the supervision of Washington state-licensed hydrogeologists or others who, in the opinion of the board, are qualified to have responsible charge of hydrogeology projects. The following may be considered qualifying hydrogeology experience:
[Statutory Authority: RCW 18.220.040, 18.220.050, and 43.24.086. WSR 19-22-034, § 308-15-057, filed 10/31/19, effective 12/1/19. Statutory Authority: RCW 18.220.040, 18.220.050. WSR 05-01-174, § 308-15-057, filed 12/21/04, effective 1/21/05.]