Question 4004 of 236 · California Water Treatment Operator Exam
What is the maximum holding time for a routine coliform sample before analysis begins?
Exactly one answer is correct.
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Correct answer to question 4004
- A: 30 hours
Explanation
Under the total coliform rule, the time from sample collection to the start of incubation may not exceed 30 hours. Keeping samples cold (below 10 degrees C) in transit is encouraged but not required.
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