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C <br /> Example of initial evaluation: <br /> Silver results from copper estimating strips <br /> Fixer Tank Fixer Overflow %Recovery <br /> (before recovery) (After Recovery) <br /> Peak workload 4 g/1 (4000 mg/1 1 g/1 (1000 mg/1) 75 <br /> Typical Workload 2.5 gA (2500 mg/1) <.5 g/1 (500 mg/1) 80 <br /> This shows a 75-80% recovery efficiency from this example of a terminal flow through <br /> electrolytic unit alone. Compare this to the claims of the unit. Tailing by metallic <br /> replacement cartridges is most likely recommended. <br /> 2. After initial evaluation, an ongoing monitorine plan should be employed to determine <br /> if the expected recovery, efficiency is being maintained. Estimating strips may be <br /> adequate to do this, but analytical laboratory analysis will be required to determine <br /> overall compliance to local sewer use codes and California Title 22 Hazardous Waste <br /> Regulations. <br /> E. Disposition of Recovered Silver Flake <br /> The products and by-products of electrolytic silver recovery are the flake silver that is <br /> plated on the cathode of the unit and the treated desilvered fixer solution. <br /> Treated, desilvered silver bearing solutions must contain less than 5 ppm silver and also <br /> meet local sewer codes to be discharged into a municipal sewer system in California. If <br /> both are not achieved, then these solutions must be collected and disposed of according to <br /> California Hazardous Waste Regulations in Title 22 of California Code of Regulations. <br /> Recovered flake silver is considered a hazardous waste in California and must be managed <br /> according to California Hazardous Waste Regulations in Title 22 of California Code of <br /> Regulations. This will involve proper collection, storage, labeling, documentation and <br /> shipment to a properly licensed refiner. Other requirements as referenced in the above <br /> regulations will apply. <br /> I <br />