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Lead-based paint (LBP) was widely used on buildings until 1978, when it was banned on residential structures by the Consumer Products Safety Commission. Commonly known as "Lead White" paint, White Lead is a mixture of lead (Pb) carbonate and lead hydroxide, and was one of the oldest pigments used in paint, with some paints for residential uses containing up to 50% lead by weight.
Over time, lead-based paint may react with certain compounds found in the air, creating a chalky film or dust that may be released. Also, lead-based paint that begins to peel, chip, or crack can expose site residents or workers to contact with these lead compounds. Exposure to this lead is most common among children, who may become lead-poisoned when they put paint chips or exterior soil in their mouths, or when they get house dust and soil on their hands and put their hands in their mouths. In addition, adults who remodel or repaint these homes may be lead-poisoned if they disturb the lead-based paint and either inhale or otherwise absorb the lead into their body.
While concentrated lead exposure can have adverse effects on nearly all organ systems in the body, it is especially harmful to the developing brains and nervous systems of children under the age of six years. At very high blood lead levels, children can have severe brain damage or even die. At blood lead levels as low as 10 micrograms per deciliter (µg/dL), children's intelligence, hearing, and growth are affected. Unfortunately, however, most lead-poisoned children demonstrate no visible symptoms. This makes it much more important to be aware of the type and condition of building materials, paints, and coatings, especially in older structures, and for the establishment of a community-based lead blood-level testing program for children in areas where older housing may be present.
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Renovation, remodeling, demolition, and surface preparation for painting, in addition to specified lead abatement, are all activities that have the potential to produce hazardous wastes if the property involved was painted with LBP (lead-based paint). The only sure way to tell if a property was painted with LBP is to test the paint for lead. The hazardous waste criterion for lead wastes is established under the federal Resource Conservation and Recovery Act (RCRA), Subtitle C, as 5.0 mg/L measured with the Toxicity Characteristic Leaching Procedure (TCLP).
Disposal of LBP-containing construction debris is very costly if it must be managed as a regulated hazardous waste. This fact sheet provides guidance on how waste generators can determine whether hazardous waste rules apply, and how to reduce the volume, and thereby the cost, of the hazardous waste component of the debris.
In order to facilitate the removal of LBP from residential structures, where it may pose a significant health threat to children, on June 18, 2003 the USEPA published a rule under solid waste regulations that streamlines disposal of LBP debris from residential structures. Under the new rule LBP debris from households, whether generated by a do-it-yourselfer or a contractor, may be disposed of at a municipal waste landfill or a construction & demolition (C&D) waste landfill, as defined in 40 CFR §257.2.
LBP debris that comes from commercial or industrial sources, as opposed to households, may be subject to state and federal hazardous waste rules. In this case the generator must determine whether the debris fails, or is likely to fail, the toxicity characteristic for lead. Two scenarios are outlined below for making the waste determination and then managing the LBP debris in accordance with applicable standards: 1) whole-building demolition, and 2) renovation/abatement.
The US EPA has stated that solid architectural components coated with LBP are less likely to be hazardous because of the small ratio of lead paint to total waste mass (1). The US Army conducted a study which concluded that whole-building demolition debris is not likely to exceed the toxicity characteristic standard for lead if it is handled as a single, whole waste stream and disposed of all together (2).
Whole-building demolition debris is therefore considered a non-hazardous waste with regard to lead. No sampling/analysis of painted components for lead is required for disposal as non-hazardous waste.
Note: Constituents other than LBP, i.e. PCBs from light ballasts or asbestos containing materials, may require special handling, and these should be removed before demolition.
Small-scale debris that is generated during renovation, maintenance, or abatement activities such as paint chips, vacuum debris and dust, waste wash water and sludge from chemical paint stripping is more likely to exceed the lead toxicity characteristic. Sampling may also be appropriate for intermediate-volume renovation wastes such as window moldings, doors, etc. Core or sectional samples can be taken of representative waste items to determine whether each type (eg. doors) is hazardous. Alternatively, the number of samples needed could be reduced by taking one or more core samples, compiling ratios of waste material surface area to mass for each type, and then comparing these to the surface area/mass ratio of the sample(s). A sampling protocol should be used for each site.
Individual waste materials such as those described above should either be sampled/analyzed by TCLP and then handled/disposed accordingly, or segregated from other large-scale debris and then managed as hazardous waste. Records of sampling procedures and analytical results must be kept for at least 3 years.
(1) US EPA. 1993. Applicability of RCRA disposal requirements to lead-based paint abatement wastes. Final Report. Technical Programs Branch, Office of Pollution Prevention and Toxics. March 1993.
(2) US Dept. of the Army. US Army Environmental Hygiene Agency. Interim Final Report. Lead-based paint contaminated debris waste characterization study No. 27-26-JK44-92. May 1993
In October 1992, Congress passed the Residential Lead-Based Paint Hazard Reduction Act, also known as Title X. Section 1018 of this law directed the U.S. Department of Housing and Urban Development (HUD) and the U.S. Environmental Protection Agency (EPA) to require disclosure of information on lead-based paint prior to the sale of most housing built before 1978. This requirement went into effect on September 6, 1996, for owners of four or more dwelling units, and on December 6, 1996, for all other property owners and agents.
Homeowners (and landlords) are required to disclose any knowledge of lead paint and provide home buyers (and leasers) with a 10-day opportunity to conduct a risk assessment or inspection for the presence of lead-based paint hazards before becoming obligated under the contract to purchase the property.
Title X also requires that home buyers (and leasers) read the Lead Warning Statement and receive a copy of the EPA pamphlet, Protect Your Family from Lead in Your Home. Finally, all parties must sign a Disclosure Statement indicating that regulations have been followed.