All gas supplied to customers shall be substantially free of impurities which may cause corrosion of mains or piping or form corrosive or harmful fumes when burned in a properly designed and adjusted burner.

Authority: Public Utilities Article, §§2-121 and 5-101, Annotated Code of Maryland

Effective date: July 1, 1964 (Order No. 55567)

Chapter revised effective October 21, 1974 (Order No. 60922)

Regulation .04A amended effective May 6, 1986 (13:9 Md. R. 1033)

Regulation .05 amended effective February 7, 2000 (27:2 Md. R. 146)