Section 250-RICR-150-10-6.29 - Holding TanksA. Use 1. Holding tanks for wastewater are prohibited for Applications for New Building Construction and Applications for Alteration to a Structure.2. A holding tank may be allowed only to repair or replace a failed OWTS at the Director's discretion.3. Holding tanks will not be allowed if a public wastewater system is available for connection. When a public wastewater system becomes available, any person owning a holding tank shall connect to said system within thirty (30) days and the holding tank shall be abandoned in accordance with § 6.56 of this Part.4. Holding tanks are allowed at marine pumpout facilities provided that direct connection to an existing public wastewater system is not possible and such tanks are constructed, installed and operated in accordance with appropriate Department Guidelines and Regulations.B. Construction - Each holding tank shall:1. Have a minimum capacity of five hundred percent (500%) of the daily design flow or portion thereof that the holding tank will serve, or two thousand (2,000) gallons, whichever is larger;2. Be watertight and meet the construction and material standards required for septic tanks in § 6.27(C) of this Part;3. Be equipped with an audio-visual alarm set to activate when the tank reaches sixty percent (60%) of its capacity;4. Have a minimum twenty inch (20") inside diameter opening that meets the requirements for septic tank access openings in §§ 6.27(H)(1), 6.27(H)(2)(b), 6.27(H)(3) and 6.27(H)(4) of this Part; and5. Be vented such that the vent is at an elevation higher than the elevation of the highest fixture served.C. Installation - Holding tank installation shall be as required for septic tanks in § 6.27(J) of this Part.D. Depth of Cover - The minimum cover over the invert of the inlet shall be one and one half feet (11/2').E. Pumping - Prior to approval of the installation of a holding tank the applicant shall provide to the Department a copy of a contract with a licensed permitted septage transporter to regularly pump the tank.F. Performance Testing - All holding tanks shall be tested on site for leakage in the manner specified for septic tanks in §§ 6.27(L)(1) or (2) of this Part.G. Existing Holding Tanks - Holding tanks in place as of January 1, 2008 that have access openings to finished grade shall be in compliance with § 6.27(H)(2)(b) of this Part no later than January 1, 2013.250 R.I. Code R. 250-RICR-150-10-6.29
Amended effective 11/25/2018
Amended effective 12/28/2021
Amended effective 7/1/2022