1. The Arsenic Rule Waste Disposal Options

2. Impacts on Disposal Alternatives Concentration of contaminants in the waste stream Concentration of contaminants in the waste stream Non-Hazardous Waste Non-Hazardous Waste Hazardous Waste Hazardous Waste Mixed Waste Mixed Waste Federal, State, & Local Regulations Federal, State, & Local Regulations Disposal facility policies Disposal facility policies Type of residuals Type of residuals Liquid Liquid Solid Solid

3. Waste Streams: Solid/Liquid Liquid Residual Stream Liquid Residual Stream Brine Brine Backwash Water Backwash Water Rinse Water Rinse Water Acid Neutralization Water Acid Neutralization Water Concentrate Concentrate Solids Spent Resins Spent Filter Media Spent Membranes Sludges

4. Anion Exchange Consider disposal of regenerate, backwash, and spent resins

5. Waste Identification Solid or Liquid? Solid or Liquid? Paint Filter Liquids Test (EPA SW 846 Method 9095) Paint Filter Liquids Test (EPA SW 846 Method 9095) Hazardous or Non-Hazardous? Hazardous or Non-Hazardous? Knowledge of the waste generation process Knowledge of the waste generation process Toxicity Characteristic Leaching Procedure (TCLP) or Waste Extraction Test (WET) in California Toxicity Characteristic Leaching Procedure (TCLP) or Waste Extraction Test (WET) in California Exemption for Small Quantity Generators Exemption for Small Quantity Generators Mixed Waste? Mixed Waste? Hazardous waste and > 0.05% uranium or thorium by weight (totaling 0.05% uranium or thorium by weight (totaling <15 lbs.)

6. RCRA Regulatory Tests Paint Filter Liquids Test Paint Filter Liquids Test TCLP TCLP Arsenic is one of the eight metals regulated under RCRA Arsenic is one of the eight metals regulated under RCRA Arsenic > 5.0 mg/L = Hazardous Arsenic > 5.0 mg/L = Hazardous

7. Paint Filter Liquids Test Determines if “free” liquids are present in a waste Wastes containing free liquids banned from disposal in municipal solid waste landfills and hazardous waste landfills Liquid wastes must be treated or disposed in an alternative manner

8. Toxicity Characteristic Leaching Procedure Predicts if hazardous components of a waste are likely to leach out Regulatory levels established for 8 metals 32 organics Exceeding regulatory levels result in designation as hazardous

9. Waste Type: Mixed Waste Contains both hazardous waste and source... or byproduct material subject to the Atomic Energy Act Contains both hazardous waste and source... or byproduct material subject to the Atomic Energy Act Also regulated by RCRA Also regulated by RCRA >0.05% U/TH by weight (totaling <15 lbs.) + Hazardous Waste = Mixed waste Subject to license from NRC or Agreement State

10. Disposal Liquid Residuals Brine, Backwash Water, Rinse Water, Acid Neutraliztion Water, Concentrate Disposal Option Waste Type Applicable Authority Key Considerations Discharge directly to surface waters Non- hazardous CWA NPDES Permit NPDES Permit Appropriate receiving body Appropriate receiving body Discharge to a Publicly Owned Treatment Works (POTW) Non- hazardous CWA Meet TBLLs, POTW and state requirements Meet TBLLs, POTW and state requirements Injection to a Class 1 UIC Well Hazardous, Non- hazardous, & Mixed SDWA/UIC Regs. Expensive, complex, and few wells Expensive, complex, and few wells Permit required Permit required Injection to a Class V UIC Well Non- hazardous SDWA/UIC Regs. Injection prohibited if it will endanger an underground source of drinking water Injection prohibited if it will endanger an underground source of drinking water

11. Disposal Solid Residuals Spent Resins, Spent Filter Media, Spent Membranes, Sludge Disposal Option Waste Type Applicable Authority Key Considerations Municipal or industrial solid waste landfill Non-hazardous RCRA Subtitle D No free liquids No free liquids At discretion of landfill owner At discretion of landfill owner Hazardous waste landfill Hazardous & Non-hazardous RCRA Subtitle C No free liquids No free liquids Can accept hazardous waste from all generator classes Can accept hazardous waste from all generator classes Low-level Radioactive Waste Landfill TENORM and possibly Mixed Waste AEA or Agreement State Limited number of landfills in the nation Limited number of landfills in the nation

12. Intermediate Processing Intermediate processing methods each creating its own residual stream Evaporation ponds Evaporation ponds Settling basins Settling basins Sludge drying beds Sludge drying beds Mechanical dewatering Mechanical dewatering