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Edcoat LLC Industrial Wastewater Discharge Permit page 7 of 45 <br />Facility Description <br />Edcoat engages in the coating of steel, galvanized steel, and aluminum. Edcoat is regulated under 40 <br />CFR 465.15 Subpart A for the processing of steel basis material (PSNS); 40 CFR 465.25 Subpart B, <br />galvanized basis material (PSNS) and 40 CFR 465.35 Subpart C, aluminum basis material (PSNS). <br />Coils are washed, rinsed, dried, coated and oven dried. <br /> <br />PART I – EFFLUENT LIMITATION <br />A. Sample Port and Collection Location <br />1. Sample Site Outfall # 1600 is located inside the WWTP in the outlet pipe after the <br />final equalization tank. The wastewater flows from the equalization tank, to a stilling <br />well, and discharges to the outlet pipe. Composite samples are collected from the <br />discharge pipe. Grab samples are collected from the stilling well, just in front of the <br />discharge pipe. <br /> <br />2. Any discharge of water or waste having a pH lower than 6.0 S.U. or a pH higher <br />than 11.0 S.U. is prohibited. In addition, the permittee’s wastewater discharge shall <br />not exceed the following effluent limitations: <br /> <br /> Effluent limitations for Sample Site Outfall # 1600: <br />Parameter Daily Maximum Limit (mg/L) Monthly Average Limit (mg/L) <br />Arsenic (mg/L) 1.0 0.3 <br />Cadmium (mg/L) Report Report <br />Chromium (mg/L) 4.81 1.92 <br />Copper (mg/L) 2.51 1.20 <br />Cyanide (mg/L) 2.54 1.01 <br />Lead (mg/L) Report Report <br />Mercury (mg/L) 0.00019 -na- <br />Nickel (mg/L) Report Report <br />Oil and Grease, Total (mg/L) 300 -na- <br />Oil and Grease, TPH (mg/L) 100 -na- <br />Silver (mg/L) Report -na- <br />Zinc (mg/L) 3.5 3.0 <br />*Note: In accordance with the City of South Bend’s “What You Need Is What You Get” allocation <br />method, local Daily Maximum and Monthly Average limits have only been developed for those <br />pollutants that have been observed at or above certain concentrations in each Significant Industrial <br />User’s wastewater discharge. If “Report” appears on the table, it has been determined that an <br />allocation of this pollutant is not necessary. The permittee shall compare any monitoring data for <br />these pollutants with the screening table in Part I (3) below. If pollutant concentrations above the <br />screening levels are observed, a local Daily Maximum and/or Monthly Average limit may be <br />developed for that pollutant.