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South Bend Ethanol LLC Industrial Discharge Permit 4 <br />4. Wastewater Treatment <br />Wastewater Treatment consists of a surge pond, DAF system, dewatering system, Ferrous <br />Chloride addition or other Control Authority approved chemical addition and pH <br />neutralization. <br />5. Classification <br />South Bend Ethanol is classified as a Significant Industrial User (SIU) as defined in the <br />South Bend Municipal Code due to its wastewater flow in excess of 25,000 gpd. South <br />Bend Ethanol is a Category “A” industry, due to its process flow over 100,000 gpd. <br />South Bend Ethanol is not a Federal Categorical User. Although they plan to engage in <br />organic chemical production, South Bend Ethanol is not covered by 40 CFR 414 because <br />ethanol is produced using fermentation. According to 414.11 (e) “The provisions of [40 <br />CFR 414] do not apply to any process wastewater discharges from the manufacture of <br />organic chemical compounds solely by fermentation processes.” <br />6. Calculation of Limits <br />South Bend Ethanol must meet Local Limits at their discharge location. Local Limits from <br />the South Bend Municipal Code are applied without modification to South Bend Ethanol’s <br />total facility effluent, with one exception: South Bend Ethanol was granted a specific <br />variance setting the upper pH limit to 12.0 S.U. in a 1995 amendment to Chapter 17 of the <br />South Bend Municipal Code. The upper pH limit of 12.0 was granted in order to assist in <br />keeping pH high in an additional effort to control hydrogen sulfide. This variance applies <br />to South Bend Ethanol as well because the industrial process, as described in South Bend <br />Ethanol’s permit application, and the surrounding situation is identical to the conditions <br />that gave rise to this variance. <br />7. Monitoring Frequency <br />Monitoring frequencies are based on South Bend’s US EPA approved Industrial <br />Pretreatment Program monitoring plan. <br /> <br />8. Industrial Operator Certification Requirement <br /> <br />Operator Certification Requirement: D <br />Industrial operator certification requirements are based on the criteria listed in Indiana <br />Administrative Code, Title 327, 5-22-5. <br /> <br />Permit Drafted by: <br /> City of South Bend <br /> Industrial Pretreatment Group <br /> November 2022 <br /> <br />