- (a) Operators shall be classified into 5 grades to parallel the classification of treatment and distribution systems described in Env-Dw 502.14 and Env-Dw 502.16.
- (b) An operator may operate a treatment plant or distribution system of the same grade or lower than the operator’s certified grade.
Source. (See Revision Note at part heading for Env-Dw 502) #9410, eff 3-12-09 (formerly Env-Ws 367.11); ss by #12363, eff 8-19-17 (formerly Env-Dw 502.16)