(a) This section applies to any animal feeding operation (AFO) operator authorized by the commission before July 13, 1995 to discharge manure, litter, or wastewater into a playa or to use a playa as a retention control structure for manure, litter or wastewater in accordance with Texas Water Code, §26.048.(b) A playa that is in use as a retention control structure, as allowed by Texas Water Code (TWC), §26.048, and that shows no signs of leakage, is considered to satisfy all applicable design and construction requirements specified in §321.38 of this title (relating to Control Facility Design Requirements Applicable to Concentrated Animal Feeding Operations (CAFOs)).(c) A groundwater plan for use of a playa shall be implemented in accordance with TWC, §26.048.(d) If the executive director determines that contamination of groundwater is occurring as a result of use of the playa as a retention facility for manure, litter, or wastewater from the AFO, the executive director shall require action to correct the problem or revoke the AFOs authority to discharge into the playa.