The Director of Public Service shall issue a permit hereunder when he finds:
(a) The work will be done according to the standard specifications of the City for public work of like character;
(b) The operation will not unreasonably interfere with vehicular and pedestrian traffic, the demand and necessity for parking spaces, and the means of ingress and egress to and from the property affected and adjacent properties; and
(c) The health, welfare and safety of the public will not be unreasonably impaired.
(1979 Code 97.03)