Industrial Wastewater Discharge Permit Modification - Imagineering Enterprises, Inc.

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Facility Description Imagineering Finishing Technologies engages in corrosion protection, plating, and finish surface coatings of various metal alloys. Imagineering conducts Abrasive, solvent and/or chemical cleaning of alloy surfaces prior to treating surfaces with phosphate (manganese or zinc) or chromium based compounds. Final surface treatment also include electroless nickel, conversion of aluminum, or painted materials. The process lines are named for the process and for the tank size in the line. For example, the 300 line has 300 gallon tanks. PART I — EFFLUENT LIMITATION A. Sample Port and Collection Location 1. SS 1 is located outside the main facility in a locked shed which is attached to the west wall of the building. The wastewater discharge flows through a weir box for flow measurement in the shed prior to discharge. The sample is collected in the discharge pipe after the final chamber of the weir box. 2. Any discharge of water or waste having a pH lower than 6.0 S.U. or a pH higher than 11.0 S.U. is prohibited. In addition, the permittee's wastewater discharge shall not exceed the following effluent limitations: Effluent limitations for Sample Site Outfall # SS 1: Parameter Daily Maximum Limit (mg/L) ,Monthly Average Limit (mg/L) Arsenic (mg/L) Report* Report* Cadmium (mg/L) Report* Report* Chromium (mg/L) 2.77 1.71 Copper (mg/L) 3.38 0.8 Cyanide (mg/L) 1.2 0.65 j Lead (mg/L) Report* Report* Mercury (mg/L) 0.00019 -na- Nickel (mg/L) 3.98 0.8 Oil and grease (mg/1) 300 -na- ,Oil and Grease TPH (mg/1) 100 -na- Silver (mg/L) Report* Report* TTO (mg/1) 2.13 -na- Zinc (mg/L) 2.61 1.48 *Note: In accordance with the City of South Bend's "What You Need Is What You Get" allocation method, local Daily Maximum and Monthly Average limits have only been developed for those pollutants that have been observed at or above certain concentrations in each Significant Industrial User's wastewater discharge. If "Report" appears on the table, it has been determined that an allocation of this pollutant is not necessary. The permittee shall compare any monitoring data for these pollutants with the screening table in Part I (3) below. If pollutant concentrations above the screening levels are observed, a local Daily Maximum and/or Monthly Average limit may be developed for that pollutant. Imagineering Enterprises, Inc. Industrial Wastewater Discharge Permit page 1 of 41