The general manager shall be responsible for all of the following:

1. (a) The implementation of the policies established by the board of directors for the operation of the district.
2. (b) The appointment, supervision, discipline, and dismissal of the district’s employees, consistent with the employee relations system established by the board of directors.
3. (c) The supervision of the district’s facilities and services.
4. (d) The supervision of the district’s finances.