Subsection 1003.3.5.1.1 of the International Plumbing Code is hereby added and shall read as follows:

1003.3.5.1.1 Large-capacity grease interceptor sizing. If under the City of Olathe’s wastewater jurisdiction, external, Large-Capacity grease interceptor sizing must be sufficient to provide a 30-minute peak hydraulic detention time, calculated based on contributing plumbing fixture units. The professional engineer (licensed in the State of Kansas) responsible for the design of the grease interceptor shall submit signed and sealed calculations indicating the number of plumbing fixture units, the plumbing plan, the maximum contributing hydraulic flow rate of these fixtures, and the volume of tank required to provide the 30-minute detention. The minimum capacity of any single grease interceptor unit shall be one thousand (1,000) gallons and the maximum capacity shall be two thousand (2,000) gallons. Where sufficient capacity cannot be achieved with a single unit, installation of grease interceptors in series shall be required. In order for multiple connections (from multiple food service facilities) to one external, large-capacity grease interceptor to be considered, a formal request for Code Modification must be submitted to the Chief Building Official or designee for review. All new connections are subject to the same requirements to submit information per Section 1003.3.5.1.1. When allowed, the owner of the interceptor shall be responsible for all cleaning, pumping, record-keeping and maintenance requirements pursuant to 1003.3.5.5.