Mandatory certification program for wastewater treatment plant operators in the State of Washington

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245 0 0 ‡aMandatory certification program for wastewater treatment plant operators in the State of Washington.
260 ‡a[Olympia?] : ‡bState of Washington, Dept. of Ecology, [1977].
300 ‡aiii, 79 p. ; ‡c28 cm.
490 0 ‡aDOE ; ‡v77-20.
538 ‡aMode of access: Internet.
650 0 ‡aSewage disposal plants ‡zWashington (State) ‡vDirectories.
650 0 ‡aSewage disposal plants ‡zWashington (State) ‡xStandards.
710 1 0 ‡aWashington (State). ‡bDepartment of Ecology.
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DAT 1 ‡a20180517095445.0 ‡b2024-04-21T18:04:53Z
DAT 2 ‡a2024-04-21T17:30:02Z ‡b2018-10-06T20:00:02Z
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