(A) The installation or construction of any new private on-site sewage facility of a type not expressly authorized by division (B) of this section is hereby prohibited.
(B) The installation and construction of new private on-site sewage facilities is limited to the following:
(1) Evapotranspiration system. A facility utilizing an evapotranspiration system that:
(a) Is designed, constructed, installed, operated and maintained in accordance with the standards and specifications of the State of Texas governing the construction of on-site sewage systems in effect at the time the construction permit is issued by the city;
(b) Is designed and sealed by a registered professional sanitarian authorized to practice in the State of Texas;
(c) Is equipped with impervious liners approved by the city;
(d) Has a separate monitoring system approved by the city installed in each bed in a manner that will facilitate the collection and sampling of effluent leakage from a ruptured liner, and which is designed to detect liner failure through periodic sampling; the entire monitor system must be assembled and ready for approval during a single inspection, and no sand shall be put in place as a cushion until the monitor system has been inspected and approved by the city; and
(e) Has been found by the city to be appropriate for its proposed use and for the nature of the property on which it is to be located.
(2) Holding tank system. A facility consisting of a holding tank or tanks that:
(a) Is designed and sealed by a registered professional sanitarian authorized to practice in the State of Texas;
(b) Is equipped with an alarm system approved by the city that will give notice when the tank or tanks need to be emptied, and that has sufficient capacity to prevent overflow after the alarm activates, as may be determined by the city, on the basis of the size of the tank and its proposed use;
(c) Is located, designed, sized and installed in accordance with specifications approved by the city; and
(d) Has been found by the city to be appropriate for its proposed use and for the nature of the property on which it is located.
(3) Pressure dosing system. A facility utilizing a pressure dosing system that:
(a) Is located, designed, constructed, installed, operated and maintained in accordance with the standards and specifications of the State of Texas governing the construction of on-site sewage systems in effect at the time the construction permit is issued by the city;
(b) Is designed and sealed by a registered professional sanitarian authorized to practice in the State of Texas;
(c) Is equipped with a high water alarm, on an electric circuit separate from the pump, and has an effluent holding tank with a remaining capacity of at least 500 gallons, if serving a single family residence, and at least 1,000 gallons, if serving a commercial or other user, after the alarm activates; and
(d) Has been found by the city to be appropriate for its proposed use and for the nature of the property on which it is located.
(C) Each unit of a multiple unit residential structure must be served by a separate private on-site sewage facility as follows:
(1) If the facility consists of an evapotranspiration system or a pressure dose system, each residential unit must have its own septic tank(s) and evapotranspiration bed(s) or soil absorption bed; and
(2) If the facility consists of a holding tank, each residential unit must have its own tank(s).