Michigan Administrative Code
Department - Licensing and Regulatory Affairs
Public Service Commission
Technical Standards For Gas Service
Part 8 - GAS QUALITY
Section R. 460.2383 - Heating value records; location and accuracy of measuring equipment; frequency of heating value determination

(1) A utility shall maintain records of the heating value of the gas it distributes. Heating value test records must be preserved for a minimum of 6 years. A utility shall utilize either the industry standards that are adopted by reference in R 460.2344(d) or other standards that are approved by the commission for heating value determination methods.

(2) Heating value measuring equipment must be installed in suitably located testing stations.

(3) The accuracy of all heating value measuring equipment and the method of making heating value tests must meet the industry standards that are adopted by reference in R 460.2344(d) or must otherwise be approved by the commission. Recording equipment must be tested, at a minimum, annually.

(4) The utility shall determine the heating value of substitute natural gas and mixed gas at a minimum of twice a day and shall make the tests during the periods of the a.m. and p.m. peak demands.

(5) The utility shall determine the heating value of gas at least once a month. A utility that sells gas subject to a thermal adjustment shall determine the heating value at least once a day.