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.. .. <br /> SUMIDEN WIRE PRODUCTS CORPORATION <br /> WKA No. 2714.01 <br /> August 18, 1994 <br /> Page 3 <br /> An industrial wastewater treatment plant is located on-site and serves in treating process water <br /> associated in the manufacturing of the wire products. The purpose of the treatment plant is to <br /> neutralize water generated from the acid fume scrubber and overflow from the rinse water baths. <br /> Rinse water used to rinse the wire products which have previously been submerged in a sulfuric <br /> acid pickling bath, combines with the sulfuric acid water generated from the acid fume scrubber. <br /> The purpose of the sulfuric acid pickling bath is to remove rust and scale from the wire products, <br /> and the purpose of the acid fume scrubber is to withdraw and treat acidic fumes generated from <br /> the sulfuric acid pickling bath. The combined wastestream is treated by simple neutralization <br /> with the addition of caustic soda. Once the wastewater is neutralized, it is discharged to the city <br /> sewer. <br /> After the wire products are rinsed in the rinse water baths, the wire is submerged in a Borax <br /> solution. In January, 1994, SWPC replaced the use of a zinc phosphate solution with a borax <br /> solution. The purpose of the borax solution, as with the former zinc phosphate solution, is to <br /> coat and protect the wire products once they have been rinsed in the rinse water baths. The <br /> borax solution proves to be less expensive, does not generate a residual as did the zinc phosphate <br /> solution, and is equally effective in coating the wire products. <br /> SECONDARY CONTAINMENT <br /> After extensive agency review, it has been concluded that secondary containment of the existing <br /> sulfuric acid rinse water sump and emergency evacuation sump is not required. Additionally, the <br /> existing aboveground storage tanks comply with secondary containment under the Uniform Fire Code <br /> and require no further upgrading or replacement. Further discussion is provided below. <br /> Sulfuric Acid Bath Hot and Cold Rinse Water Baths and Borax Aboveground Storage Tanks <br /> Under the Uniform Fire Code, Division III, Section 80.301, drains shall be directed to a containment <br /> system or other location designed as secondary containment for the hazardous materials liquids and <br /> NOV <br /> WALLACE•KUH <br />