[Code of Federal Regulations] [Title 49, Volume 3] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR193.2161] [Page 131] TITLE 49--TRANSPORTATION CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 193_LIQUEFIED NATURAL GAS FACILITIES: FEDERAL SAFETY STANDARDS-- Table of Contents Subpart C_Design Sec. 193.2161 Dikes, general. An outer wall of a component served by an impounding system may not be used as a dike unless the outer wall is constructed of concrete. [Amdt. 193-17, 65 FR 10959, Mar. 1, 2000]