No well shall be drilled within the city limits without properly equipping the surface casing when set with at least one master valve, and without properly equipping the production casing when set with at least one master valve and one fluid operated ram type blowout preventer; and without properly equipping the production casing during completion operations and work over operations with at least one master valve and one fluid operated ram type blowout preventer. On each well drilled, a valve cock or kelly cock shall be installed on the kelly used. Each blowout preventer shall test six thousand (6,000) pounds, and its mechanical operation shall be tested at least once during every eight (8) hour period, and all control equipment shall be in good working condition and order at all times. Provided, the commission may reduce the level of the test for the blowout preventer to four thousand (4,000) pounds. (Ord. 1939 § 4, 2009)