• accumulate all sludges, spent solvents, and aqueous solutionsfrom hot tanks in a closed, marked container
  
• determine by testing if sludge and spent solvents are hazardous and manage accordingly
  
• consider alternative cleaning methods such as detergent based (aqueous) parts washers (determination still needed)

• dispose of spent hot tank solution down any drain or on the ground
  
• dispose of hot tank sludge in a dumpster or on the ground

Some auto repair shops use (alkaline) tanks for cleaning greasy parts. The tank solution is changed infrequently. When the solution is changed, however, the spent solution and sludge from the tanks typically become hazardous wastes due to their corrosivity and heavy metal content.

For more information concerning the proper handling of hot tank solution, contact the Florida Department of Environmental Protection, Bureau of Solid and Hazardous Waste (http://www.dep.state.fl.us/waste/categories/shw/default.htm) or the Florida Center for Solid and Hazardous Waste Management (http://floridacenter.org). This information is offered only as guidance. Specific requirements may vary with individual processes and/or businesses.