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

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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