A cement plug at least 100 feet long shall be placed in the well with the top between 50 and 150 feet below the ocean floor. All inside casing strings with uncemented annuli shall be pulled from below the surface plug. The casing shall not be shot or cut in a manner that will damage outer casing strings and prevent reentry into the well.
Cal. Code Regs. Tit. 14, § 1745.5