NAC445A.459. Methods of obtaining samples of water.

     1. Samples of water taken for the purpose of a complete chemical analysis must be taken as provided in this section.

     2. A sample taken to analyze levels of components not requiring preservation must be collected in a clean glass or plastic half-gallon or gallon container. A thoroughly rinsed plastic distilled water bottle or unused plastic milk bottle, obtainable at a dairy or a food or drug store, is recommended for this purpose.

     3. A sample taken to analyze levels of nitrates and metals must be collected in a container provided by the laboratory performing the analysis, using the appropriate materials for preservation provided by the laboratory. These materials may be added to the containers by the laboratory before the sample is taken. Care must be exercised in using such materials because of their hazardous nature.

     4. A sample taken to analyze levels of trace organic materials must be taken in a glass container provided by the laboratory performing the analysis. The laboratory shall also provide any preservatives required for preventing deterioration of the organic materials.

     5. If any representative sample is taken from a well for the purpose of chemical analysis:

     (a) Except as otherwise provided in paragraph (b), an amount of water equivalent to 4 to 10 times the bore volume of the well must be pumped from the well before the sample is taken.

     (b) In the case of a new well, the well must be pumped until all artifacts of the drilling process have been removed and the water flows clean and clear, and in any event for not less than 24 hours.

     (c) The sample must be taken in a manner consistent with that described in chapter 9, section 9.6, of the Handbook for Sampling and Sample Preservation of Water and Wastewater, EPA- 600/4-82-029.

     6. If any representative sample is taken from a distribution system for the purpose of chemical analysis:

     (a) Except for lead and copper samples collected pursuant to 40 C.F.R. § 141.86, as adopted by reference in NAC 445A.4525, the water line from which the sample is taken must be flushed until the temperature of the water stabilizes.

     (b) The sample must be taken in a manner consistent with that described in chapter 9, section 9.9, of the Handbook for Sampling and Sample Preservation of Water and Wastewater, EPA- 600/4-82-029.

     7. If any sample is taken for the purpose of bacteriological examination, the sample must be collected in a container obtained from the laboratory performing the analysis of the sample.

     8. A copy of the Handbook for Sampling and Sample Preservation of Water and Wastewater is available from the National Technical Information Service, 5285 Port Royal Road, Springfield, Virginia 22161, or at the Internet address http://www.ntis.gov. The product code of the publication is PB83-124503, and it may be obtained at a cost of $99.

     [Bd. of Health, Municipal Water Supplies Reg., eff. 1962]—(NAC A 3-22-89; 9-6-96; A by Environmental Comm’n by R014-08, 4-17-2008; R194-08, 10-27-2009)