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v �J <br /> Onsite Hazardous Waste <br /> Treatment Facility Permit <br /> FTU Operation Specification <br /> Facility ID: CA0000950653 <br /> Facility: Advanced Metal Plating <br /> 4421 Giannecchini Lane <br /> Stockton, CA 95206 <br /> Description of how FTU operates: <br /> Two fixed treatment units are employed to treat the waste. The first FTU is a chemical <br /> precipitation system. This unit is a compartmentized skid-mounted unit with chambers for <br /> havalent chromium reduction followed by pH adjustment and chemical precipitation. The <br /> dissolved heavy metals (copper, nickel, chromium, and zinc) are precipitated with magnesium <br /> hydroxide and then coagulated by use of a polymer. The solids are then settled in a clarifier and <br /> the clear overflow is sent to a polishing ion exchange resin before discharge to the sewer. The <br /> remaining solids are filtered in a press. The dried solids are shipped offsite for disposal. <br /> Spent concentrates are treated by evaporation. The solutions are placed in an atmospheric <br /> evaporator where water is removed. The solution is sprayed onto evaporative panels to humidify <br /> the blower air that is forced through these panels. The humid air is then ducted to the <br /> atmosphere. <br /> Data sheets on both units are attached. <br />