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Atmospheric tanks used for storing Class IIIB liquids heated by internal heating coil/element shall be equipped with a liquid level indicator or equivalent device that displays the liquid level in the tank; or a temperature regulating system. When equipped with a temperature regulating system, the temperature regulating system shall automatically shut off the heat source to the tank before the tank contents reach the ignition temperature. If a liquid level indicator is the sole sensing method, 1) the liquid level indicator shall be affixed to the tank or located elsewhere, such as in a control room, 2) the liquid level indicator shall be monitored when filling or emptying the tank, 3) the location of the internal heating coil/element on the tank shall be clearly indicated.
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. New section filed 1-16-96; operative 2-15-96 (Register 96, No. 3).
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