1. (a) Acceptable laboratories. Samples collected to determine compliance with the requirements of this subchapter shall be analyzed at certified or approved laboratories.

   1. (1) Samples used to determine compliance with the MCLs, and action levels requirements of this subchapter must be analyzed by a laboratory certified by the Texas Department of Health Bureau of Laboratories. These samples include:

      1. (A) compliance samples for SOCs;
      2. (B) compliance samples for VOCs;
      3. (C) compliance samples for inorganic contaminants;
      4. (D) compliance samples for radiological contaminants;
      5. (E) compliance samples for microbial contaminants;
      6. (F) compliance samples for TTHM;
      7. (G) compliance samples for HAA5;
      8. (H) compliance samples for chlorite;
      9. (I) compliance samples for bromate; and
      10. (J) compliance samples for lead and copper.

   2. (2) Samples used to determine compliance with the treatment technique requirements and MRDLs of this subchapter must be analyzed by a laboratory approved by the executive director. These samples include:

      1. (A) compliance samples for turbidity treatment technique requirements;
      2. (B) compliance samples for the chlorine MRDL;
      3. (C) compliance samples for the chlorine dioxide MRDL;
      4. (D) compliance samples for the combined chlorine (chloramine) MRDL;
      5. (E) compliance samples for the disinfection by-product precursor treatment technique requirements, including alkalinity, total organic carbon, and specific ultraviolet absorbance;
      6. (F) samples used to monitor chlorite levels at the point of entry to the distribution system; and
      7. (G) samples used to determine pH.
   3. (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.

2. (b) Acceptable analytical methods. Methods of analysis shall be as specified in 40 Code of Federal Regulations 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 Permitting and Resource Management Division, MC-155, Texas Natural Resource Conservation Commission, 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. (1) section 141.21(f) for microbiological analyses;
   2. (2) section 141.22(a) for turbidity analyses;
   3. (3) section 141.23(f) for inorganic analyses;
   4. (4) section 141.24(e), (f), and (g) for organic analyses;
   5. (5) section 141.25 for radionuclide analyses;
   6. (6) section 141.131(b) for disinfection by-product analyses;
   7. (7) section 141.131(c) for disinfectant analyses;
   8. (8) section 141.131(d) for alkalinity analyses, specific ultraviolet absorbance analyses, and pH analyses; and
   9. (9) section 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.

Source Note:The provisions of this §290.119 adopted to be effective September 13, 2000, 25 TexReg 8880.