Wastewater treatment plant operators certification program
By: State of Washington Wastewater Operators' Certification Board.
Contributors: Washington (State). Dept. of Ecology.
Publisher: Dept. of Ecology
Published: 1978
Place of publication: Olympia, WA
Language: eng
Number of pages: 17
Subjects: Sewage disposal plants -- Officials and employees -- Certification -- Washington (State); Sewage disposal plants -- Standards -- Washington (State)
Notes: "DOE 78-8."