A. The sampling, analytical methodology, and laboratory certification requirements of 40 CFR 141 and 40 CFR 143 in effect as of July 1, 2018 2023, are incorporated by reference into this chapter.

B. The alternative test methods published at 89 FR 5780 through 5794 on January 30, 2024, and the corrections to those alternative test methods published at 89 FR 7624 through 7625 on February 5, 2024, are incorporated by reference into this chapter.

C. The specific sampling, analytical methodology, and laboratory certification requirements incorporated by reference are listed as follows by category for information purposes:

1. Inorganic chemistry: 40 CFR 141.23, 40 CFR 141.89, and 40 CFR 141.131.

2. Organic chemistry: 40 CFR 141.24 and 40 CFR 141.131.

3. Microbiology: 40 CFR 141.21, 40 CFR 141.74, 40 CFR 141.174, 40 CFR 141.402(c)(2), 40 CFR 141.704, 40 CFR 141.705, and 40 CFR 141.852. 40 CFR 136.3(a) for E. coli requirements under 40 CFR 141.704.

4. Radiochemistry: 40 CFR 141.25.

5. Alternative testing methods: 40 CFR Part 141, Subpart C, Appendix A.

6. Test methods specified for secondary maximum contaminant levels: 40 CFR 143.4.

C. D. The exceptions to the requirements for laboratory certification in 40 CFR 141.28, 40 CFR 141.74(a), 40 CFR 141.89(a)(1), 40 CFR 141.131(b)(3), and 40 CFR 141.131(c)(3) are incorporated by reference into this chapter.