La. Admin. Code tit. 51 § XIII-101
A. As used in this Part, the terms defined in this Chapter supplement any definitions which may be set forth in law and shall have the following meanings and/or applications, unless the context or use thereof clearly indicates otherwise, or more explicit definitions and/or applications are referenced. Terms not defined or referenced herein shall have the meanings as defined in the other Parts of the sanitary code of the state of Louisiana. In any instance where a term defined herein is also defined in one or more other Parts of this Code, the definition contained in this Part shall be given preference as it pertains to sewage disposal.
Commercial Treatment Facility (designed in accordance with §503) - any treatment facility which is required by the state health officer whenever the use of an individual sewerage system is unfeasible or not authorized.
Community Sewerage System - any sewerage system which serves multiple connections and consists of a collection and/or pumping/transport system and treatment facility.
Conventional Septic Tank System - a septic tank system which consists of a septic tank(s) followed by a subsurface absorption field.
Facility or Facilities - any or all of the apparatus and appurtenances associated with a sanitary sewage treatment system, element, or process.
Gravelless Pipe - a proprietary device which may be used in lieu of conventional subsurface absorption field materials when approved by the state health officer.
Individual Mechanical Plant - a treatment facility which provides primary and secondary treatment of sanitary sewage by use of aerobic bacterial action which is sustained by mechanical means.
Individual Sewerage System - any system of piping (excluding the building drain), and/or collection and/or transport system which serves one or more connections, and/or pumping facility, and treatment facility, all located on the property where the sanitary sewage originates; and which utilizes the individual sewerage system technology which is set forth in Chapter 7 Subchapter B of this Part, or a commercial treatment facility which is specifically authorized for use by the state health officer.
Limited Use Sewerage System - a sewerage system which may be authorized by the state health officer for installation or use for a structure or dwelling which is occupied less than four days in a week, and the use of which generates less than 100 GPD of sanitary sewage.
Manufacturer - a person who engages in the business or practice of constructing individual mechanical sewerage treatment systems, and who is responsible for having the system evaluated in compliance with §725. D of this Part.
Outfall Path-the path or course by which effluent leaving the final treatment unit of a community sewerage system or individual sewerage system reaches its ultimate receiving navigable stream or body of water.
Person - any natural person, partnership, corporation, association, governmental subdivision, receiver, tutor, curator, executor, administrator, fiduciary, or representative of another person, or public or private organization of any character.
Premises - any structure or dwelling of any construction whatsoever in which a person may live, work, or congregate.
Sanitary Sewage - any and all human waste and/or domestic waste, the disposal of which requires a sewerage system approved or authorized by the state health officer. Sanitary sewage may include its conveying liquid and/or any other liquid or solid material which may be present therein.
Secondary Treatment Standard - a sewage effluent water quality standard which prescribes a maximum 30-day average concentration of biochemical oxygen demand (5-day basis) of 30 milligrams per liter (mg/l), and a maximum daily concentration of biochemical oxygen demand (5-day basis) of 45 mg/l. The 30-day average concentration is an arithmetic mean of the values for all effluent samples collected in the sampling period. The analyses to be performed for the purpose of determining compliance with these effluent limitations and standards shall be in accordance with the eighteenth edition of the "Standard Methods for the Examination of Water and Wastewater," available from the American Public Health Association 1015 Eighteenth Street NW, Washington, D.C. 20036, except where otherwise specified.
Septic Tank System - an individual sewerage system which consists of a septic tank(s) followed by a process which treats and disposes of the septic tank effluent.
Sewerage System - any system of piping (excluding the building drain and building sewer) and/or collection and/or transport system and/or pumping facility and/or treatment facility, all for the purpose of collecting, transporting, pumping, treating and/or disposing of sanitary sewage.
Subdivision for the purpose of these regulations-
a. the division, or the process or results thereof, of any land into two or more lots, tracts, parcels, or plots, any one of which has an area of less than 3 acres; or
b. the re-subdivision of land heretofore divided into lots, tracts, sites or parcels; provided, however, that minimum lot size restrictions presented in §511. B shall not apply to:
i. a subdivision legally established and recorded prior to July 28, 1967; or
ii. a small parcel of land sold to or exchanged between adjoining property owners, provided that such a sale or exchange does not create additional lots.
c. Note: For the purpose of these regulations, the requirements for wetlands might be more stringent.
Sub-Manufacturer - a person or entity authorized by a licensed manufacturer to construct, or assemble individual sewerage systems, or any portion thereof.
Trailer Coach - any of the various forms of structures which are equipped, or capable of being equipped, with wheels, including, but not limited to, travel trailers, truck coaches or campers, mobile homes, trailers, and/or tent campers, whether capable of moving under its own power or not, and where a person or persons may live, work, or congregate.
Trailer Park - any lot, tract, parcel or plot of land upon which more than one trailer coach is or may be located, and where trailer coach spaces are rented or leased.
La. Admin. Code tit. 51, § XIII-101