2376.1 The gas supplied by any gas utility shall not show the presence of any hydrogen sulphide at levels greater than twenty-five hundredths (0.25) grains per one hundred (100) standard cubic feet (SCF) of gas and shall not contain more than twenty (20) grains of total sulphur in one hundred (100) SCF of gas as measured at the custody transfer point of gas utility and its supply source.

2376.2 The test for hydrogen sulphide, or such test as may be approved by the Commission, shall be made by the methylene blue test as defined in American Society for Testing Materials (ASTM) #D2725. This method covers the determination of hydrogen sulphide in natural gas for not more than 1.0 grain of hydrogen sulphide/100 SCF (Standard x Cubic Feet) (23 mg/m³).

SOURCE: Final Rulemaking published at 35 DCR 7938, 7952 (November 4, 1988).