Texas Health and Safety Code - HEALTH & SAFETY § 366.0512. Multiple Treatment Systems

(1) is located on a tract of land of at least 100 acres in size;

(2) produces not more than 5,000 gallons a day on an annual average basis;

(3) is used only on a seasonal or intermittent basis; and

(4) is used only for disposal of sewage produced on the tract of land on which any part of the system is located.