Nebraska Administrative Code › Topic - HEALTH AND HUMAN SERVICES SYSTEM › Title 179 - PUBLIC WATER SYSTEMS › Chapter 26 - REVISED TOTAL COLIFORM RULE › Section 179-26-009 - REPEAT MONITORING AND E. COLI REQUIREMENTS

Current through June 17, 2024
009.01 Repeat
				Monitoring
26-009.01A If a sample taken under
				26-005 through
				26-008 is total coliform-positive,
				the system must collect a set of repeat samples within 24 hours of being
				notified of the positive result. The system must collect no fewer than three
				repeat samples for each total coliform-positive sample found. The Department
				may extend the 24-hour limit on a case-by-case basis if the system has a
				logistical problem in collecting the repeat samples within 24 hours that is
				beyond its control. Alternatively, the Department may implement criteria for
				the system to use in lieu of case-by-case extensions. In the case of an
				extension, the Department must specify how much time the system has to collect
				the repeat samples. The Department cannot waive the requirement for a system to
				collect repeat samples in
				26-009.01A
				through
				26-009.01C.
26-009.01B The system must collect all repeat
				samples on the same day, except that the Department may allow a system with a
				single service connection to collect the required set of repeat samples over a
				three-day period or to collect a larger volume repeat sample(s) in one or more
				sample containers of any size, as long as the total volume collected is at
				least 300 ml.
26-009.01C The system
				must collect an additional set of repeat samples in the manner specified in
				26-009.01A
				through
				26-009.01C if one
				or more repeat samples in the current set of repeat samples is total
				coliform-positive. The system must collect the additional set of repeat samples
				within 24 hours of being notified of the positive result, unless the Department
				extends the limit as provided in
				26-009.01A. The
				system must continue to collect additional sets of repeat samples until either
				total coliforms are not detected in one complete set of repeat samples or the
				system determines that a coliform treatment technique trigger specified in
				26-010.01 has been exceeded as a result of a repeat sample being total
				coliform-positive and notifies the Department. If a trigger identified in
				26-010 is exceeded as a result of a
				routine sample being total coliform-positive, systems are required to conduct
				only one round of repeat monitoring for each total coliform-positive routine
				sample.
26-009.01D After a system
				collects a routine sample and before it learns the results of the analysis of
				that sample, if it collects another routine sample(s) from within five adjacent
				service connections of the initial sample, and the initial sample, after
				analysis, is found to contain total coliforms, then the system may count the
				subsequent sample(s) as a repeat sample instead of as a routine
				sample.
26-009.01E Results of all
				routine and repeat samples taken under
				26-005 through 26-009 not invalidated
				by the Department must be used to determine whether a coliform treatment
				technique trigger specified in
				26-010 has been exceeded.