A minimum of two fire extinguishers shall be maintained at all oil well or temporary geological exploratory core hole locations where drilling, servicing or repair work is being conducted. Each such extinguisher shall have a minimum classification of 20 B as set forth in N.B.F.U. No. 10, N.E.P.A. No. 10, “Portable Fire Extinguishers.”
('86 Code, § 21.12.110) (Ord. 3173, passed  - - )  (Penalty, see § 1.12.010)