Question 5010 of 223 · California Water Treatment Operator Exam
Under the federal Lead and Copper Rule, an action level is exceeded when
Exactly one answer is correct.
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Correct answer to question 5010
- A: more than 10 percent of tap samples are above the level
Explanation
The action level is based on the 90th percentile. If more than 10 percent of samples exceed it, the system must take actions such as corrosion control and public education.
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