A water system is on reduced monitoring for lead and copper. If this system adds new or revised treatment, must the system resume lead and copper sampling as a new system?
Answer:
The state may require a system to resume sampling and collect the number of samples specified for standard monitoring or take other appropriate steps such as increased water quality parameter monitoring or re-evaluation of its corrosion control treatment (40 CFR 141.86(d)(4)(vii)).
Question (23002-32405)
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