Except in cases of emergency where it is necessary to maintain circulation in the well or the well would be endangered if the pulling work were not done immediately, no well servicing or any work in connection with pulling a well shall be done between the hours of 10:00 p.m. of one day and 6:00 a.m. of the following day, if at the time of well servicing or maintenance any of the following conditions exist:
(A) 25 or more dwellings are located within 1,320 feet of the location of the well;
(B) Six or more dwellings are located within 660 feet of the location of the well;
(C) Any structure used for housing mentally or physically ill or aged persons, having five or more beds, is located within 660 feet of the location of the well.
(`78 Code, § 14.16.110.)