EPA Lead Inspector key terms

Paint or other surface coating that contains lead at or above the regulatory threshold, which for most federal housing and abatement rules is 1.0 milligram per square centimeter or 0.5 percent by weight.

The 1992 federal law that created the national framework for lead hazard evaluation, abatement, training, and certification of lead professionals, and directed EPA to regulate lead-based paint activities.

Any measure or set of measures designed to permanently eliminate lead-based paint hazards, including paint removal, component replacement, enclosure, encapsulation, and the cleanup that follows these activities.

A set of measures intended to temporarily reduce human exposure to lead hazards, such as specialized cleaning, paint stabilization, and dust control, without permanently eliminating the hazard.

A general term for the activities used to identify lead hazards in a home, including paint inspection, risk assessment, and clearance examinations performed by certified professionals.

A firm certified by EPA to perform renovation, repair, or painting work in pre-1978 housing and child-occupied facilities under the Renovation, Repair and Painting Rule, using certified renovators and lead-safe work practices.

Harm to the nervous system caused by a toxic substance. With lead, effects include reduced IQ, learning and attention problems, and behavioral changes, especially in young children exposed during brain development.

The concentration of lead in a person's blood, usually reported in micrograms per deciliter, used as the primary biological indicator of recent lead exposure and risk of health effects.

Groups especially vulnerable to lead exposure and its effects, particularly children under age six, pregnant women and their fetuses, and workers with occupational lead exposure.

Surface dust on floors, window sills, or window troughs that contains lead at or above regulatory clearance or hazard levels, representing a common pathway of childhood exposure through hand-to-mouth activity.

A limited risk assessment that collects less data than a full risk assessment and is used to determine whether a property is likely to have lead hazards and whether further evaluation is needed.

An on-site investigation to determine the existence, severity, and location of lead hazards, including paint, dust, and soil sampling plus an evaluation of exposure pathways and occupant characteristics.

A surface-by-surface investigation to determine the presence and location of lead-based paint on building components, using XRF testing and, when needed, paint chip sampling, without assessing hazard risk.

A post-abatement or post-renovation evaluation that verifies cleaning has been effective and that dust-lead levels are below regulatory limits before the area is reoccupied.

The planned approach for selecting which surfaces, rooms, or exterior areas to test, how many samples to collect, and what analytical methods to use so results are representative and defensible.

Building components or surfaces of the same material, color, and approximate age that can be grouped so a single sample represents the whole group, reducing the number of samples needed.

A portable X-ray fluorescence instrument that measures lead content in paint in place, reporting results in milligrams per square centimeter, and the primary tool for paint inspections.

Manufacturer and EPA documentation describing how a specific XRF model performs, including calibration check tolerances, substrate correction needs, and whether results are inconclusive, so inspectors interpret readings correctly.

A routine verification performed before and during XRF testing using a reference standard to confirm the instrument is measuring accurately and within the tolerance stated in its performance documentation.

Collecting a small piece of dried paint, often with the underlying substrate, from a surface for laboratory analysis, used when XRF results are inconclusive or to confirm lead content.

A standardized method of collecting dust from a measured surface area, such as a floor or window sill, using a treated wipe for laboratory analysis of lead loading.

Collecting soil from bare areas such as play areas and building driplines for lead analysis, typically using a coring or composite technique to represent a defined area.

Formal recognition, such as by EPA's National Lead Laboratory Accreditation Program, that a laboratory meets quality and technical standards for analyzing lead in paint, dust, or soil.

A written document describing the procedures, quality control checks, and acceptance criteria a project will use so sampling and analytical data are reliable and defensible.

A documented record tracking each sample from collection through transport and analysis, showing who handled it and when, to preserve its integrity and evidentiary value.

The lowest concentration of lead a laboratory method can reliably quantify, below which results are reported as non-detect or estimated and may require cautious interpretation.

A sample to which a known amount of lead has been added for quality control, used to verify that the laboratory method recovers lead accurately and is not biased.

The required disclosure of known lead-based paint and hazards to buyers or tenants, and the sharing of inspection or risk assessment findings so occupants can make informed decisions.

Preparing a clear, accurate, and complete written record of the inspection or risk assessment, including methods, locations, results, limitations, and recommended actions.

The formal document delivered to the client that presents sampling locations, analytical results, interpretation against regulatory standards, and any limitations or assumptions of the work.

A situation in which an inspector's financial or personal interests could bias their findings, such as recommending abatement by a firm they own, which professional ethics require disclosing and avoiding.

Repairing or repainting deteriorated paint surfaces so they are intact and do not create dust or chips, a common interim control that is not a permanent abatement method.

An abatement method that covers a lead-painted surface with a rigid, durable material such as drywall or paneling, sealing the hazard away without removing the lead paint.

An abatement method that coats lead-painted surfaces with a specialized sealant that bonds to the paint and prevents release of lead, requiring compatible materials and periodic monitoring.

An XRF reading that falls in a range where the instrument cannot reliably distinguish lead-based from non-lead paint, requiring confirmation by paint chip laboratory analysis.

An adjustment applied to XRF readings when the material beneath the paint, such as brick or metal, affects the measurement, as specified in the instrument's performance documentation.