(a) Acceptable laboratories. Samples collected to determine compliance with the requirements of this chapter shall be analyzed at accredited or approved laboratories.
  (1) Samples used to determine compliance with the maximum contaminant levels, samples used to determine compliance with action level, and raw groundwater source monitoring requirements of this subchapter, and samples for microbial contaminants must be analyzed by a laboratory accredited by the executive director in accordance with Chapter 25, Subchapter A and B of this title (relating to General Provisions; and Environmental Testing Laboratory Accreditation) using acceptable analytical methods as specified in subsection (b) of this section. These samples include:
    (A) compliance samples for synthetic organic chemicals;
    (B) compliance samples for volatile organic chemicals;
    (C) compliance samples for inorganic contaminants;
    (D) compliance samples for radiological contaminants;
    (E) compliance samples for microbial contaminants;
    (F) compliance samples for total trihalomethanes (TTHM);
    (G) compliance samples for haloacetic acid-group of five (HAA5);
    (H) compliance samples for chlorite;
    (I) compliance samples for bromate; and
    (J) compliance samples for lead and copper.
  (2) Samples used to determine compliance with the treatment technique requirements and maximum residual disinfectant levels (MRDLs) of this subchapter must be analyzed by a laboratory approved by the executive director. These samples include:
    (A) compliance samples for turbidity treatment technique requirements;
    (B) compliance samples for the chlorine MRDL;
    (C) compliance samples for the chlorine dioxide MRDL;
    (D) compliance samples for the combined chlorine (chloramine) MRDL;
    (E) compliance samples for the disinfection byproduct precursor treatment technique requirements, including alkalinity, total organic carbon, dissolved organic carbon analyses, and specific ultraviolet absorbance;
    (F) samples used to monitor chlorite levels at the point of entry to the distribution system; and
    (G) samples used to determine pH.
  (3) Non-compliance tests, such as control tests taken to operate the system, may be run in the plant or at a laboratory of the system's choice.
(b) Acceptable analytical methods. Methods of analysis shall be as specified in 40 Code of Federal Regulations (CFR) or by any alternative analytical technique as specified by the executive director and approved by the Administrator under 40 CFR §141.27. Copies are available for review in the Water Supply Division, MC 155, Texas Commission on Environmental Quality, P.O. Box 13087, Austin, Texas 78711-3087. The following National Primary Drinking Water Regulations set forth in Title 40 CFR are adopted by reference:
  (1) 40 CFR §141.852(a) and (c) for microbiological analyses;
  (2) 40 CFR §141.74(a)(1) for turbidity analyses;
  (3) 40 CFR §141.23(k) for inorganic analyses;
  (4) 40 CFR §141.24(e) - (g) for organic analyses;
  (5) 40 CFR §141.25 for radionuclide analyses;
  (6) 40 CFR §141.131(a) and (b) for disinfection byproduct methods and analyses;
  (7) 40 CFR §141.131(c) for disinfectant analyses other than ozone, and 40 CFR §141.74(b) for ozone disinfectant;
  (8) 40 CFR §141.131(d) for alkalinity analyses, bromide and magnesium, total organic carbon analyses, dissolved organic carbon analyses, specific ultraviolet absorbance analyses, and pH analyses;
  (9) 40 CFR §141.89 for lead and copper analyses and for water quality parameter analyses that are performed as part of the requirements for lead and copper;
  (10) 40 CFR §141.402(c) for groundwater source microbiological analyses; and
  (11) if a method is not contained in this section, a drinking water quality method can be approved for analysis if it is listed in 40 CFR Part 141, Subpart C, Appendix A.
(c) The definition of detection contained in 40 CFR §141.151(d) is adopted by reference.

Source Note: The provisions of this §290.119 adopted to be effective September 13, 2000, 25 TexReg 8880; amended to be effective May 16, 2002, 27 TexReg 4127; amended to be effective January 9, 2008, 33 TexReg 198; amended to be effective May 15, 2011, 36 TexReg 2860; amended to be effective November 8, 2012, 37 TexReg 8849; amended to be effective March 30, 2017, 42 TexReg 1466