North Dakota

Leak Detection and Repair

North Dakota has adopted the Federal standards of performance for new stationary sources.

Venting and/or Flaring

No person may discharge into the air any contaminant which has an opacity greater than 40% for more than one six-minute period per hour and a person may not discharge into the ambient air from any single source of emission whatsoever any air contaminant which exhibits an opacity greater than 20% except that a maximum of 60% opacity is permissible for not more than one six-minute period per hour. This shall not apply in the following circumstances: Where the presence of uncombined water is the only reason for failure of an emission to meet the requirements. When smoke is emitted for the purpose of training or research when approved by the department. Where an applicable opacity standard is established for a specific source. Where fugitive emissions are caused by agricultural activities related to the normal operations of a farm.

Method of measurement: Compliance with emission standards shall be determined by conducting observations in accordance with Method 9. Per hour for Method 9 means any contiguous 60 minute time period. When Method 9 opacity readings are not available, continuous opacity monitors may be substituted. Per hour for monitors means any 60 minute period commencing on the hour.

Restriction of fugitive gaseous emissions. No person shall emit or cause to be emitted into the ambient air from any source of fugitive emissions any gases which: Exceed the ambient air quality standards. Exceed the prevention of significant deterioration of air quality increments. Exceed the emission restrictions for odorous substances. Exceed the restrictions on the emission of visible air contaminants.