40 CFR 35.918 - Individual systems.
(1) Individual systems. Privately owned alternative wastewater treatment works (including dual waterless/gray water systems) serving one or more principal residences or small commercial establishments which are neither connected into nor a part of any conventional treatment works. Normally, these are on-site systems with localized treatment and disposal of wastewater with minimal or no conveyance of untreated waste water. Limited conveyance of treated or partially treated effluents to further treatment or disposal sites can be a function of individual systems where cost-effective.
(2) Principal residence. Normally the voting residence, the habitation of the family or household which occupies the space for at least 51 percent of the time annually. Second homes, vacation, or recreation residences are not included in this definition. A commercial establishment with waste water flow equal to or smaller than one user equivalent (generally 300 gallons per day dry weather flows) is included.
(3) Small commercial establishments. Private establishments normally found in small communities such as restaurants, hotels, stores, filling stations, or recreational facilities with dry weather wastewater flows less than 25,000 gallons per day. Private, nonprofit entities such as churches, schools, hospitals, or charitable organizations are considered small commercial establishments. A commercial establishment with waste water flow equal to or smaller than one user equivalent (generally 300 gallons per day dry weather flow) shall be treated as a residence.
(4) Conventional system. A collection and treatment system consisting of minimum size (6 or 8 inch) gravity collector sewers normally with manholes, force mains, pumping and lift stations, and interceptors leading to a central treatment plant.
(5) Alternative waste water treatment works. A waste water conveyance and/or treatment system other than a conventional system. This includes small diameter pressure and vacuum sewers and small diameter gravity sewers carrying partially or fully treated waste water.
(b) A public body otherwise eligible for a grant under § 35.920-1 is eligible for a grant to construct privately owned treatment works serving one or more principal residences or small commercial establishments if the requirements of §§ 35.918-1, 35.918-2, and 35.918-3 are met.
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