(Adopted 10/22/68; Revised 10/6/69, 5/23/72, 7/18/72)

The following analytical methods are hereby adopted as standard methods of the Ventura County Air Pollution Control District. Other analytical methods may be used in place of the standard methods provided that equivalent results are obtained. In cases where the standard methods are not valid, applicable methods acceptable to the District may be substituted.

  1. Rule 50. Opacity. Ringelmann Chart, as described in Bureau of Mines Circular 7718, August, 1955.
  2. Rule 51. Nuisance. No standard procedures.
  3. Rules 52 and 53. Particulate Matter. Collection by wet impinger, drying and weighing as described in Appendix A available on request.
  4. Rule 54. Specific Contaminants.
    1. Sulfur dioxide at point of discharge (high concentration). Collection by wet impinger, conversion to sulfuric acid and titrating as described in Appendix B available on request.

    2. Sulfur dioxide at ground level (low concentration). Collection by wet impinger, Schiff base formation, and colorimetric determination, Appendix C available on request.

    3. Combustion Contaminants

      a. Particulate matter, paragraph C of this Rule.

      b. Carbon dioxide. Standard Orsat method, as described in Appendix D, available on request.

  5. Rule 55. Organic Gases. Showing of compliance by the person responsible for an organic gas emission shall include applicable portions and/or calculation procedures contained in API Bulletin 2514, "Evaporation Loss from Tank Cars, Tank Trucks, and Marine Vessels," in API Bulletin 2517, "Evaporation Loss from Floating Roof Tanks," and API Bulletin 2518, "Evaporation Loss from Fixed Roof Tanks."
  6. Rule 59. Oxides of Nitrogen. The analytical method employed shall be one approved by the State of California Air Resources Board, or as otherwise provided in this Rule for substitute methods and is available in Appendix F on request.