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Washington Certification Services
Backflow Assembly Tester Certification Examinations
Backflow Assembly Tester Professional Growth Examinations
Washington State Department of Ecology
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Wastewater Operator Certification Program Website
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Division of Environmental Health, Office of Drinking Water
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United States Geological Survey (USGS)
Washington Environmental Training Center 12401 SE 320th St, Mail Stop WW Auburn, Washington 98092-3699 In Wash. State 800.562.0858 Out of State: 253.288.3369 FAX: 253.288-3475
