Wastewater treatment plant operators certification program.
Series: DOE ; 80-3; Publication (Washington (State). Dept. of Ecology) -- no.  80-3.
Publisher: Office of Field Operations, Enforcement Section, State of Washington Dept. of Ecology
Published: 1980
Place of publication: [Olympia]
Language: eng
Number of pages: 28
Subjects: Sewage disposal plants -- Washington (State) -- Officials and employees -- Certification.