Nebraska Administrative Code
Topic - HEALTH AND HUMAN SERVICES SYSTEM
Title 179 - PUBLIC WATER SYSTEMS
Chapter 12 - CONTROL OF LEAD AND COPPER
Section 179-12-012 - ANALYTICAL METHODS
Universal Citation: 179 NE Admin Rules and Regs ch 12 ยง 012
Current through September 17, 2024
012.01 Analyses for lead, copper, pH, conductivity, calcium, alkalinity, orthophosphate, silica, and temperature must be conducted with the methods found in 179 NAC 3-005.11A.
12-012.01A Analyses for alkalinity, calcium,
conductivity, orthophosphate, pH, silica, and temperature may be performed by
any Grade IV, III, II or I certified water operator. Analyses under 179 NAC 12
for lead and copper must only be conducted by the Health Department Laboratory
or a laboratory which has entered into agreement with the Department pursuant
to 179 NAC
3-009. To obtain certification to
conduct analyses for lead and copper, laboratories must:
1. Analyze performance evaluation samples
which include lead and copper provided by EPA, the Department or by a third
party (with the approval of the Department or EPA) at least once a year by each
method for which the laboratory desires certification; and
2. Achieve quantitative acceptance limits as
follows:
a.
For Lead:
+ 30% of the actual amount in the Performance
Evaluation sample when the actual amount is greater than or equal to 0.005
mg/L. The Practical Quantitation Level, or PQL for lead is 0.005
mg/L.
b.
For
Copper: + 10% of the actual amount in the
Performance Evaluation sample when the actual amount is greater than or equal
to 0.050 mg/L. The Practical Quantitation Level, or PQL for copper is 0.050
mg/L;
3. Achieve the
method detection limit (MDL) for lead of 0.001 mg/L according to the procedures
in Appendix B of Part 136 of the Code of Federal Regulations, incorporated
herein as Attachment 2. This need only be accomplished if the laboratory will
be processing source water composite samples under 179 NAC
12-011.01A item
3.
12-012.01B All lead
and copper levels measured between the PQL and the MDL must be either reported
as measured or they can be reported as one-half the PQL specified for lead and
copper in 179 NAC
12-012.01A item
2. All levels below the lead and copper MDLs must be reported as
zero.
12-012.01C All copper levels
measured between the PQL and the MDL must be either reported as measured or
they can be reported as one-half the PQL ( 0.025 mg/L). All levels below the
copper MDL must be reported as zero.
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