(a) Tests required under §112.114 of this title (relating to Testing Requirements) must be conducted using the test methods in 40 Code of Federal Regulations (CFR) Part 60, Appendices A-1 through A-8 and Appendix B or other methods as specified in this section, except as provided in 40 CFR §60.8(b).     
      (b) Sulfur content of fuels and carbon black oil must be determined using American Society for Testing and Materials (ASTM) Method D4294.     
      (c) Sulfur content of carbon black must be determined using ASTM Method D1619.     
      (d) Sulfur dioxide in exhaust gases must be determined using United States Environmental Protection Agency (EPA) Test Method 6 or 6C (40 CFR, Part 60, Appendix A).     
      (e) For flares subject to emissions limitations or standards in §112.112 of this title (relating to Control Requirements), the owner or operator shall use flare test methods and procedures in 40 CFR §60.104a as if the federal rules apply to carbon black plants.     
      (f) Alternate methods as approved by the executive director and the EPA may be used.     
     Source Note:        The provisions of this §112.115 adopted to be effective October 27, 2022, 47 TexReg 6985