R 299.2446 Secondary containment; general requirements.

Rule 2446. Secondary containment measures at a wellhead or surface facility shall meet all of the following requirements: (a) The sidewalls and floor of a secondary containment area shall be constructed and sealed in a manner to prevent the seepage of waste product, stored product, or brine into the surrounding soils, surface waters, or groundwater. (b) Dikes or firewalls shall be maintained and the enclosure kept free of waste products, stored products, tank bottoms, brine, water, vegetation, debris, and any flammable or combustible material. (c) The containment volume shall be the larger of 11% of the total capacity of all vessels or 111% of the capacity of the largest vessel located in a secondary containment area. For the purposes of this subdivision, the largest vessel is either the largest single vessel or those vessels connected in such a way to allow unrestricted gravity flow from vessel to vessel. (d) A permittee shall install an automatic surface facility shutdown system if the facility has a through put of liquids in a 24-hour period that exceeds the containment volume of the secondary containment area. The automatic shutdown system shall be designed to prevent liquids from overflowing the secondary containment area. A surface facility shall be exempt from the requirement of an automatic shutdown system if the facility has staff present while operating and is equipped with alarm systems on the storage tank or tanks. (e) All transfer and injection pumps shall have leak containment constructed to prevent the seepage of any liquids moved by the pump or any lubricating oils into the surrounding soils, surface waters, or groundwater. (f) Wellheads and flare stacks shall have secondary containment and spill containment areas constructed in a manner to prevent the seepage of waste product, stored product, or brine into the surrounding soils, surface waters, or groundwater. Secondary containment at the wellhead shall be constructed in a manner to capture leakage of liquid that may occur. In addition, if the wellhead is equipped with a pump jack utilizing a gasoline or diesel- powered engine, then the engine shall also have secondary containment that is sufficient to prevent the seepage of any machine oils or fuels into the surrounding soils, surface waters, or groundwater. (g) A permittee shall keep secondary containment areas free of standing liquid. All spills in a secondary containment area shall be pumped up within 48 hours of discovering the spill. (h) A permittee shall submit for the supervisor of mineral wells' approval, a plan for inspections and monitoring of active wells and surface facilities.