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FIELD DEMONSTRATION OF LEAD-BASED PAINT REMOVAL AND INORGANIC STABILIZATION TECHNOLOGIES
Citation:
Kominsky, J. R. FIELD DEMONSTRATION OF LEAD-BASED PAINT REMOVAL AND INORGANIC STABILIZATION TECHNOLOGIES. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-01/055 (NTIS PB2002-102037), 2001.
Impact/Purpose:
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Description:
A study was conducted to demonstrate the effectiveness of a wet abrasive blasting technology to remove lead-based paint from exterior wood siding and brock substrates and to stabilize the resultant blasting media (coal slag and mineral sand) paint debris to reduce the leachable lead content. The average lead loading of the paint coating on the wood and brick substrates was 6.9 and 51.9 mg/cm(2), respectively. The effectiveness of the lead-based paint removal technology was determined using an X-ray fluorescence (XRF) spectrum analyzer (L&K shell). The XRF measurements were corroborated by analysis of substrate samples using inductively-coupled plasma atomic emission spectroscopy (ICP-AES). the Effectiveness of the technologies to stabilize the debris was evaluated through the Toxicity Characteristic Leaching Procedure (TCLP). Aerodynamic particle size distributions of lead particulate generated during paint removal were measured using a multi-stage personal cascade impactor. personal and area air samples were collected to evaluate the potential of the wet abrasive blasting technology to generate exposure levels of lead above the OSHA Permissible Exposure Limit (PEL) of 50 ug/m(3), 8 hr time-weighted average. Wet abrasive blasting effectively removed the lead-based paint coating from both the wood and brick substrates to below the USDOH and Urban Development Guideline (1 mg/cm(2)) with minimal or no damage to the underlying substrates (p<0.0001). The mean area air levels of lead-containing particulate generated during paint removal were significantly below the PEL (p<0.001), whereas the mean personal breathing zone lead levels were approximately 3 times higher than the PEL. Neither of the two stabilization technologies consistently stabilized the abrasive media paint debris to achieve and leachable lead content below the RCRA regulatory threshold (< 5mg/L).
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Project SummaryFIELD DEMONSTRATION OF LEAD-BASED PAINT REMOVAL AND INORGANIC STABILIZATION TECHNOLOGIES