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Mr. Ramon Burton July 12, 1985 Page 2 Waste InventorS PACE Laboratories, Inc. with the assistance of Waltek, Inc. personnel conducted an inventory of all waste generated at Waltek, Inc. 'This inventory identified a total of 3 hazardous wastes and 4 non-hazardous wastestreams. The hazardous wastestreams identified at Waltek, Inc. uere: l) Sodium hydroxide sludge 2) Freon waste 3) Hydroflouric acid/Nitric acid waste. The non-hazardous wastestreams included grinding residue, wheelobrator residue, shell waste, and oil waste. · Sodium Hydroxide Sludge - Currently there are 31 55 gallon drums, l0 35 gallon drums and lO lO gallon drums of sodium hydroxide sludge stored on-site at Waltek, Inc. All drums are open head and appear to be full. T~e amount of water in these drums varies from being rock hard to slightly moist. Attached to this letter is our report of laboratory analysis of the sodium hydroxide sludge. Representative samples of the sludge were collected by PACE Laboratories, Inc. from a randomly selected number of the drums. The analysis shows that the only hazardous property exibited by the sodium hydroxide sludge is its pH of 13. This high pH classifies sodium hydroxide sludge as being corrosive. We have completed a Rollins Environmental Permit Application form for disposal of the sodium hydroxide sludge at a permitted hazardous waste landfill. This form needs to be reviewed by Waltek, Inc. and if acceptable signed and forwarded to: Mr. Gene Jameson Waste Research and Reclamation Company Route 7 Eau Claire, WI ~ased upon our preliminary discussions with Rollins Environmental it appears that the sodium hydroxide sludge would have to be repackaged in ~5 gallon drums or 85 gallon over packs prior to off site shipment. ~.lowever, there are two other potential options for disposal of this waste u~ich are; on site neutralization and discharge to either the drain field ,~ the sanitary sewer system; or identi~ing another industry that can use [ne w~ste as a product in a ~aste exci~ange.- ~l~e feasibility oF on-site neutralization o~ the sodium hydroxide sludge would have to be weighed against its cost verses off-site transportation to a disposal facility and the ability to discharge the resulting neutralized wastewater stream to either your drain field or to the Anoka Sanitary Sewer System. Tills option should only be considered if the ~aste exchange concept cannot be realized. We would recommend that a pilot study be performed on the sodium hydroxide sludge to determine the c,)s'~ for neutralizing and tile feasil)lity for discharging the trea~ed :..~st~,~q~ ...... int~ ~i~. 4rain ...... fiel.i r~ A.no.t~.~ Sanitary q~,.~..~.~_r System,