Section 250-RICR-140-05-4.4 - Incinerator Ash Design StandardsA. Ash Separation: The facility must be designed to allow for the possibility that fly ash and bottom ash will not be mixed. There must be provisions for separate handling, collection, transfer and storage facilities for each of the ashes.B. Ash Transport: An ash transport system shall be provided for transfer of the bottom ash and fly ash and spent scrubber reagent (if applicable) from the combustion process to residue storage area(s). A secondary system shall be provided in case of breakdown of the primary transfer system.C. Ash Quenching: Vessel(s) shall be provided to quench or cool all siftings, and ash residues. The vessel(s) shall be designed to handle the maximum potential ash volumes that could be generated when operating at maximum design throughput capacity refuse. The quench vessel shall be designed to maintain a water level of sufficient height to prevent infiltration of exterior air into the combustion chamber, while maintaining suitable freeboard to prevent spillage.D. Ash and Recovered Materials Storage Capacity: The facility shall be designed with sufficient internal storage area for ash and recovered materials (if applicable). Ash storage areas must be designed and installed in compliance with requirements for storage of hazardous waste at new hazardous waste management facilities (40 C.F.R. § 264, Subpart J, incorporated in § 1.3(A) of this Subchapter). The volume of the storage area shall be based on ash generation rates, ash sampling frequency, ash tests and laboratory turnaround time, contractual arrangements with other licensed temporary storage sites and/or licensed final disposal sites and scheduling with transporters.E. Ash Drains and Liquids Collection Chambers: All floor drains and/or collection chambers for liquid run-off from the ash storage area shall be designed to drain to the ash quench basin and there shall be no connection with sanitary or storm sewers.250 R.I. Code R. 250-RICR-140-05-4.4