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STABILIZATION OF LEAD-BASED PAINT WASTE
Citation:
Environmental Quality Management, Inc. STABILIZATION OF LEAD-BASED PAINT WASTE. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-00/085 (NTIS PB2001-100765), 2000.
Description:
This study evaluated the ability of a cementitious stabilizing agent to reduce leachable lead from lead-based paint waste removed from substrate via blasting, and to evaluate the mechanism by which the reduction occurs. Testing demonstrated that the representative cementitious agent can effectively stabilize red lead-based paint (LBP) blasting waste to reduce leachable lead levels below the RCRA toxicity characteristic level (5 mg/L). However, the effectiveness of the stabilization process can be impacted by insufficient mixing. The recommended usage level of stabilization agent is 10% by weight based on percent solids. The cementitious stabilizing agent fixates lead through an encapsulation mechanism and not by chemical reaction of lead oxide to form lead silicate. Based on Multiple Extraction Procedure (MEP) and TCLP testing this immobilization was not impacted by the pH of the leaching extract, which strongly indicates its long term immobilization and durability.