Industrial Discharge Permit - New Carlisle and St. Joseph Energy Center

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PERMIT BRIEFING MEMO 1. Facility Description The St. Joseph Energy Center - Water Treatment Facility's (Water Treatment Facility) engages in the production of process well water which is filtered through a greensand system to remove by precipitation iron and manganese, prior to being pumped to the St. Joseph Energy Center. The process will also precipitate arsenic. 2. Discharge description: Discharge is primarily backwash water, though sanitary is also included. The Water Treatment Facility will periodically go into a backwash cycle, which will send backwash water to a settling lagoon. The water is metered prior to discharge into the City of South Bend Sewer System. Estimated average discharge is 32,000 gpd, with an estimated 96,000 maximum gpd. 3. Sample Site Description Sample Site Outfall 4 745 is located on the east side of the settling lagoon within the lift station, inside the fence along Walnut Road. 4. Wastewater Treatment Wastewater treatment consists of a settling lagoon. 5. Classification Based on the City's Industrial Pretreatment Program, The Water Treatment Facility is classified as a Significant Industrial User (SIU) and, because of the facility's discharge of > 50,000 gpd - < 100,000 gpd, it is categorized as a Category B industrial discharger. 6. Calculation of Limits Discharge limits are applied from the South Bend Municipal Code directly to The Water Treatment Facility's effluent. Find these limits in Part I (A) (2) of this permit. 7. Monitoring Frequency Monitoring frequencies are based on South Bend's US EPA approved industrial Pretreatment Program monitoring requirements. However, more frequent monitoring will be required in the first year of new industrial users. Industrial Operator Certification Requirement Operator Certification Requirement: A -SO. — Industrial Certification requirements are based on the criteria listed in Indiana Administrative Code Title 327-5-22-5