Question 1012 of 223 · California Water Treatment Operator Exam
Before a new or repaired well is placed in service, it is normally
Exactly one answer is correct.
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Correct answer to question 1012
- C: disinfected with a high-dose chlorine solution and tested for coliform bacteria
Explanation
Wells are disinfected after construction or repair because bacteria can be introduced by drilling tools, pumps and personnel. Bacteriological samples must then show the well is safe.
More questions: Source Water
- 1013Which of the following is a common sign that a well may be pumping air or sand?
- 1014A sudden increase in the drawdown of a well with no change in the pumping rate most likely indicates
- 1015Which watershed activity is the greatest threat to a surface water supply used for drinking?
- 1016A watershed sanitary survey is conducted to
- 1017Water in a deep reservoir often forms layers in summer because
- 1018Reservoir turnover in the fall or spring can cause treatment problems mainly because it