| (a) Sufficiency of service. Each retail public utility shall plan, furnish, operate, and maintain collection, treatment, and disposal facilities to collect, treat and dispose of waterborne human waste and waste from domestic activities such as washing, bathing, and food preparation. These facilities must be of sufficient size to meet the minimum design criteria for wastewater facilities of the commission for all normal demands for service and provide a reasonable reserve for emergencies. Unless specifically authorized in a written service agreement, a retail public utility is not required to receive, treat and dispose of waste with high BOD or TSS characteristics that cannot be reasonably processed, or storm water, run-off water, food or food scraps not previously processed by a grinder or similar garbage disposal unit, grease or oils, except as incidental waste in the process or wash water used in or resulting from food preparation by sewer utility customers engaged
in the preparation and/or processing of food for domestic consumption or sale to the public. Grease and oils from grease traps or other grease and/or oil storage containers shall not be placed in the wastewater system. (b) Sufficiency of treatment. Each retail public utility shall maintain and operate treatment facilities of adequate size and properly equipped to treat sewage and discharge the effluent at the quality required by the laws and regulations of the State of Texas. (c) Maintenance of facilities. (1) The retail public utility shall maintain its collection system and appurtenances to minimize blockages. (2) If the utility retains ownership of receiving tanks located on the customer's property or other facilities and appurtenances, it is the utility's responsibility and liability to perform routine maintenance and repair.
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