WAC 246-290-668   Watershed control.  (1) The purveyor shall, to the extent possible, exercise surveillance over conditions and activities in the watershed affecting source water quality. The purveyor shall develop and implement a department-approved watershed control program.

     (2) The purveyor shall ensure that an evaluation of the watershed is completed at least every six years. Watershed evaluations shall be performed such that results of the survey are included in the purveyor's water system plan in accordance with WAC 246-290-100 or small water system management program in accordance with WAC 246-290-105, whichever is applicable.

     (3) A professional engineer registered in the state of Washington shall direct the conduct of the watershed evaluation and develop a watershed evaluation report.

     (4) The purveyor shall submit the report to the department within sixty days of completion of the watershed evaluation.

     (5) The report shall describe the watershed, characterize the watershed hydrology, and discuss the purveyor's watershed control program. The report shall also describe:

     (a) Conditions/activities in the watershed that are adversely affecting source water quality;

     (b) Changes in the watershed that could adversely affect source water quality that have occurred since the last watershed evaluation;

     (c) The monitoring program the purveyor uses to assess the adequacy of watershed protection including an evaluation of sampling results; and

     (d) Recommendations for improved watershed control.



[Statutory Authority: RCW 43.02.050 [43.20.050]. 99-07-021, § 246-290-668, filed 3/9/99, effective 4/9/99. Statutory Authority: RCW 43.20.050. 93-08-011 (Order 352B), § 246-290-668, filed 3/25/93, effective 4/25/93.]