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PERMIT BRIEFING MEMO <br />1. Facility Description <br />Imagineering Finishing Technologies engages in Alodine (chromium -free, using titanium), zinc <br />phosphate metal finishing, zinc manganese metal finishing, and passivation of panels, parts and <br />pieces. The finished parts are shipped off site. Imagineering operates between the hours of 9:00 <br />PM to 5:30 PM. There are 45 employees who work in staggered shifts lasting 8.5 hours each <br />with no anticipated seasonal variation in production. <br />2. Discharge description <br />Imagineering discharge is split into wastewater that undergoes pretreatment and is discharged <br />through the sampling location, and wastewater that is not pretreated and is discharged directly to <br />the sewer. The only wastewater that is discharged at the sampling location is the wastewater that <br />undergoes pretreatment. Wastewater that is discharged directly to the sewer includes: boiler <br />blow down, water softener backwash, sanitary waste, and RO backwash brine water. <br />Wastewater that undergoes pretreatment before discharge includes: Passivation line rinse waters <br />and concentrates, Zinc Phosphate line rinse waters and concentrates, Zinc Manganese line rinse <br />waters and concentrates, Alodine line rinse waters and concentrates, and air scrubber pollution <br />control wastewater. <br />Industrial process waters discharge to Outfall 260 via a weir box. For compliance sampling, 24 <br />hour flow proportional composite samples are pulled from the weir box via a composite sampler. <br />Discharge totalizer numbers are documented daily. The boiler sump discharge line has a paddle <br />wheel totalizer that is used to determine blowdown and reverse osmosis brine flow. This water <br />flows to the sanitary line. RO softener backwash is metered and discharged to the sanitary line <br />as well. <br />Imagineering reports that chromium, copper, nickel, and zinc are present in its wastewater. <br />Imagineering suspects that lead and silver may be present as well. <br />The 12 month estimated average process discharge flow is: 13,865 gpd. The estimated <br />maximum daily discharge over the previous 12 months is 27,764 gallons. <br />3. Sample Site Description <br />Sample Site Outfall at Site #260 is located at the east end of the building. The sample site is <br />end -of -pipe; only process waters and pollution control wastewaters are discharged from the <br />sampling site. Therefore there is no need for using the combined wastestream formula or any <br />other modification. <br />4. Wastewater Treatment <br />Wastewater treatment consists of chemical precipitation, flocculation, filtration, flow <br />equalization, neutralization and pH adjustment, sumps, and spill prevention. <br />Imagineering Finishing Technologies Industrial Wastewater Discharge Permit Page 3 of 25 <br />