40 CFR 141.561 - What happens if my system's turbidity monitoring equipment fails?
If there is a failure in the continuous turbidity monitoring equipment, your system must conduct grab sampling every four hours in lieu of continuous monitoring until the turbidimeter is back on-line. Your system has 14 days to resume continuous monitoring before a violation is incurred.
Title 40 published on 2014-07-01
no entries appear in the Federal Register after this date.