[Code of Federal Regulations] [Title 40, Volume 19] [Revised as of July 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR148.2] [Page 825] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 148--HAZARDOUS WASTE INJECTION RESTRICTIONS--Table of Contents Subpart A--General Sec. 148.2 Definitions. Injection interval means that part of the injection zone in which the well is screened, or in which the waste is otherwise directly emplaced. Transmissive fault or fracture is a fault or fracture that has sufficient permeability and vertical extent to allow fluids to move between formations.