Industrial Wastewater Discharge Permit Modification - Imagineering Enterprises, Inc.

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PERMIT BRIEFING MEMO 1. 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. Imagineering facility employs 88 employees and operates 3 shifts, 5 days per week. 2. Discharge description: All wastewater is ultimately discharged through the final discharge point known as site SS1. Wastewater is segregated into two outfalls. Concentrates and dead rinses are generated from different processes (Phosphating, Acid Etching, and Electroless Nickel Plating), and are batch treated on -site and discharged through site SS1 or shipped off site for disposal. Water from the overflowing rinses from the different processes are discharged through SS without treatment. The Passivation line is the source of hexavalent chrome in the wastewater. The Passivation line consists of concentrates and overflowing rinses only. Wastewaters produced in the Passivation process are also batch treated on -site and discharged through site SS1 or is shipped off site for disposal. Estimated average process discharge flow is: 30,914 gpd with an estimated maximum process discharge of 50,526 gpd. Air compressor blow down, boiler blow down, water softener backwash, and RO backwash are discharged directly to the sanitary sewer without treatment. 3. Sample Site Description SS1 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. SS 1 is both end -of -process and end -of -pipe (sanitary waste excluded). 4. Wastewater Treatment Wastewater treatment consists of chemical precipitation, flow equalization, neutralization, polymer flocculation, settling, filtration and chrome reduction. 5. Classification Imagineering Finishing Technologies is a Categorical Industrial User (CIU). Specifically, Imagineering Finishing Technologies is a metal finisher covered by (CFR-433w 5 f 1 41,1' 1 (71 R 3„ Jj L � �"� due to the electroplating and metal finishing operations. Imagineering Finishing Technologies is categorized as a B industry.