Learn how to calculate detention time. For water and wastewater operators. If you're preparing for the water treatment operator certification exam, check out this book on Practice Exams: http://amzn.to/2atFJfv For more practice problems, go to http://www.waterandwastewatercourses.... .
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Learn how to calculate detention time. For water and wastewater operators. If you're preparing for the water treatment operator certification exam, check out this book on Practice Exams: http://amzn.to/2atFJfv
For more practice problems, go to http://www.waterandwastewatercourses.... .