A. The following are the standards established by the board of trustees pursuant to the authority granted by subsection 8-2-5-5A of the Sewer Use and Pretreatment Ordinance. No user shall discharge any wastewater containing concentrations greater than the local limits as set forth below into any sewers that connect either directly or indirectly to the POTW.
Pollutant (total, unless otherwise listed) | Concentration (instantaneous) |
Oil and grease: at non-food service establishment (FSE) or food manufacturing sites | 100 mg/l |
Oil and grease: at food service establishment (FSE) | 200 mg/l |
B. The village reserves the right to apply the FSE local limit as appropriate above at an end-of-pipe Discharge location that connects to the public sewer system in the event that a unique sampling location in the end compartment of a grease interceptor (GI) is not available or there is no external GI.
C. The village also reserves the right to apply the FSE local limit to the wastewater in the next sanitary sewer manhole downstream of the facility in the event that there is neither a GI sampling location nor a sampling manhole at the site.
D. FSE Twenty Five Percent (25%) Requirement: The village reserves the right to use the twenty five percent (25%) rule in lieu of the FSE oil and grease local limit in either FSE, non-FSE or manufacturing situations where an external grease interceptor exists.
1. The last section of an external GI at an FSE shall be measured to determine that the total volume of the GI being used for any food-derived solids to settle or accumulate plus the floatable grease-derived materials that rise and accumulate, identified as a solids blanket and grease cap respectively, is less than twenty five percent (25%) of the total design hydraulic depth as measured from the effluent discharge pipe to the bottom ("twenty five percent (25%) requirement").
2. The village will apply the twenty five percent (25%) requirement above normally at the discharge side of the external grease interceptor prior to mixing with any other wastewater from the contributing FSE's property. (Ord. 20-08-25, 8-10-2020)