This demonstration showed that wet abrasive blasting effectively removed the lead-based paint from both exterior wood siding and brick with little or no damage to the substrate. The residual lead levels on the substrates were significantly below the HUD guideline of 1 mg/cm~2. The wet abrasive slurry mixture also reduced fugitive emissions of lead-containing paniculate, thus affording the workers and the surrounding environment increased protection. However, neither of the two stabilization technologies consistently stabilized the abrasive lead-containing paint debris to meet the RCRA criterion as a nonhazardous waste (<5 mg/L lead) at the additive ratios applied during the demonstration. After adjusting the abrasive additive levels to meet the man- ufacturers' preferred levels, paint debris treated with Turbo~(~R)/PreTox had a leachable lead concentration of 0.1 mg/L-well below the RCRA criterion for a hazardous waste.
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