(A) General. Non-soil based systems shall include holding tanks and surface discharging onsite wastewater treatment systems. These systems shall be approved only for uses specified in this section and shall not be approved in lieu of a reserve soil treatment area when required. Subject to the restrictions of § 171.110, the uses for, or conditions under which a non-soil based onsite wastewater treatment system may be approved include:
(B) Conditions for the approval of holding tanks. A holding tank may be approved by the Health Officer in the following conditions and for the following uses:
(1) Awaiting public sewer extension. A holding tank may be approved as a temporary onsite wastewater treatment system while awaiting the extension of a public sewer, when the provision of the public sewer will occur within one year.
(a) Proof of eventual connection. Approval for the proposed connection and the time frame in which the sewer will be available shall be provided in documentation from the controlling authority of the sewer.
(2) Awaiting installation of an onsite wastewater treatment system. A holding tank may be approved as a temporary onsite wastewater treatment system when a soil based onsite wastewater treatment system is approved, but its construction is delayed by weather conditions. The use of a temporary holding tank shall not exceed 180 days.
(3) Sanitary dumping station. A holding tank may be approved as a sanitary dumping station to receive wastewater from the holding facilities of recreational vehicles.
(4) Non-residential building - low flow. A holding tank may be approved as an onsite wastewater treatment system for a non-residential building when the peak daily wastewater flow is projected to be less than 150 gallons per day as determined from Table C.1, or when the average daily flow is projected to be less than 150 gallons per day calculated over a one week period during peak usage.
(5) Seasonal home - inaccessible. A holding tank may be approved as an onsite wastewater treatment system for a seasonal dwelling on land inaccessible to vehicles.
(6) Publicly owner facility. A holding tank may be approved as an onsite wastewater treatment system for a publicly owned and operated seasonal recreational facility with an average daily flow of less than 150 gallons per day calculated over a one week period during peak usage.
(7) Overflow capture. A holding tank may be approved for use as an overflow capture tank in accordance with the requirements of § 171.067(B)(2)(b)4.
(8) Waste not allowed in a soil based onsite wastewater treatment system. A holding tank may be approved to receive the discharge from fixtures or drains that receive waste products such as automotive grease, oils, solvents or chemicals that are not allowed to be discharged into an onsite wastewater treatment system. These waste products shall be handled according to rules for the disposal of oil, gas and grease promulgated under the Environmental Protection Act, or according to 35 Ill. Adm. Code Subtitle G, or shall be taken to an oil and gas reclamation center. Domestic sewage shall not be comingled with these waste products. Note: Also see Illinois Plumbing Code (77 Ill. Adm. Code 890). Holding tanks to be utilized for applications within this section shall be listed and labeled by Underwriters Laboratories, and constructed of materials approved for gas and oil interceptors as specified in 77 Ill. Adm. Code 890.520, and shall be properly anchored to prevent flotation.
(9) Vault privy/waterless toilet. A holding tank may be approved as an onsite wastewater treatment system for the collection of human waste where there are toilet facilities but no potable water source to the building, such as a comfort station.
(10) Existing non-soil based system. A holding tank may be approved as an onsite wastewater treatment system to replace an existing non-soil based onsite wastewater treatment system.
(C) Conditions for the approval of surface discharging onsite wastewater treatment systems. A surface discharging onsite wastewater treatment system may be approved by the Health Officer in the following conditions and for the following uses:
(Ord. [Bd of Health Ord., Art. V], passed 11-12-1996; Ord. [Bd of Health Ord., Art. V], passed 11-12-2013; Ord. 17-0605, passed 6-13- 2017; Ord. 24-1005, passed 8-13-2024)