Question 5006 of 223 · California Water Treatment Operator Exam
The Surface Water Treatment Rule requires systems using surface water to
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Correct answer to question 5006
- C: filter and disinfect to achieve at least 3-log Giardia and 4-log virus removal or inactivation
Explanation
Total treatment must provide 99.9 percent Giardia and 99.99 percent virus reduction. Filtration gets credit for part of the removal and disinfection provides the rest.
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