1. Incompetency, inefficiency or inattention to, or dereliction of duty;

2. Dishonesty, intemperance, immoral conduct, discourteous treatment of the public, or any other act of omission or commission tending to injure the public service;

3. Any wilful failure on his part to properly conduct himself; any wilful violation of the terms of this chapter pertaining to operation of the volunteer fire department;

4. Mental or physical unfitness for the position of public service;

5. Dishonest, disgraceful, immoral or prejudicial conduct;

6. Drunkenness or use of intoxicating liquor, narcotics or any other habit-forming drugs, liquid or preparation, to such extent that the use thereof interferes with his mental or physical fitness or precludes him from properly performing his functions and duties as fire chief;

7. Conviction of a felony or of a misdemeanor involving moral turpitude; and

8. Any other act or failure to act which in the judgment of the Council is sufficient to show him to be an unsuitable and unfit person to be employed in the public service.