| This standard was formulated for the purpose of implementing Environmental Protection Law of the People's Republic of China and Air Pollution Prevention and Control Law, preventing and controlling air pollution and improving the quality of environment. The standard provides Ringelmann smoke chart for testing blackness of smoke plume including position and conditions for observation, observation method, calculation method and specifications of standard Ringelmann smoke chart. The standard applies to monitoring the blackness of grey or black smoke discharged from stationary sources at the outlet. It does not apply to monitoring of smoke of other colors. It is the first time to issue the standard. |
