NAC459.95376. Documentation to be maintained concerning worst-case release scenarios and alternative release scenarios.

The owner or operator shall maintain at his or her facility:

     1. For worst-case release scenarios:

     (a) A description of the vessel or pipeline and substance that the owner or operator selected as worst-case; and

     (b) A list of the assumptions and parameters that the owner or operator used, including, without limitation:

          (1) A description of any administrative controls and passive mitigation that the owner or operator assumed to limit the quantity of the substance which would be released;

          (2) The anticipated effect of the controls and mitigation on the release quantity and rate; and

          (3) The reasons why the owner or operator selected these assumptions and parameters.

     2. For alternative release scenarios:

     (a) A description of the scenarios that the owner or operator identified; and

     (b) A list of the assumptions and parameters that the owner or operator used, including, without limitation:

          (1) A description of any administrative controls and active or passive mitigation that the owner or operator assumed to limit the quantity of the substance which would be released;

          (2) The anticipated effect of the controls and mitigation on the release quantity and rate; and

          (3) The reasons why the owner or operator selected these assumptions and parameters.

     3. For worst-case scenarios and alternative release scenarios:

     (a) Documentation of:

          (1) The estimated quantity released, release rate and duration of release;

          (2) The methodology that the owner or operator used to determine the distance to the endpoints; and

          (3) The data that the owner or operator used to estimate the population and environmental receptors which potentially will be affected; and

     (b) Verification that the active and passive mitigation systems are designed to remain functional under the conditions of the release scenarios.

     (Added to NAC by Environmental Comm’n by R121-98, eff. 5-27-99)