This study addressed the use of automated equipment to dose and mix lead stabilizing compounds to allow leaded paint residue/debris to be disposed at in-state contained landfills. The stabilizing would be conducted in situ at bridges being subjected to maintenance painting operations involving total coating removal and replacement. Many Kentucky bridges have existing painting that contains lead compounds at levels which may constitute hazardous wastes upon removal. The KYTC practice of recycling lead containing residue is working well at this time but the issue of a single recycler available continues to place KYTC in a position of returning to hazardous waste disposal should the recycling option be removed. Limited field sampling and testing of removed paint residue indicates high total lead content but, typically below the 5 mg/L, TCLP action level. A previous KTC report indicated that TCLP test results of paint removal residue will often be less than 5 mg/L, however some samples will exceed the hazardous waste threshold. KYTC should pursue the chemical stabilization of paint removal residue to provide an additional option to hazardous waste handling and disposal.
Digital Object Identifier
Meade, Bobby W.; Hopwood, Theodore II; and Palle, Sudhir, "Automated Chemical Stabilizing of Leaded Paint Residue from Bridge Maintenance Painting Operations" (2011). Kentucky Transportation Center Research Report. 24.