EPA Lead Risk Assessor key terms

Section of the Toxic Substances Control Act that directs EPA to regulate lead-based paint activities by requiring accredited training programs and certified individuals and firms; implemented through 40 CFR Part 745.

TSCA provision requiring that persons who perform lead-based paint inspections, risk assessments, and abatement be trained and certified, and authorizing states to run their own programs in place of EPA's.

The federal regulation implementing TSCA Title IV; it covers lead-based paint activities, training accreditation and individual certification, disclosure, lead-safe renovation, and hazard standards for paint, dust, and soil.

Rule at 40 CFR 745 Subpart E requiring sellers and landlords of pre-1978 housing to disclose known lead-based paint and hazards, provide the EPA pamphlet, and allow a 10-day inspection period.

Paint or other surface coating containing lead at or above 1.0 milligram per square centimeter, or 0.5 percent by weight, the threshold that triggers regulatory requirements and hazard evaluation.

EPA or authorized state recognition that an individual has completed accredited training and met requirements to perform a specific lead-based paint activity; firms performing these activities must also be certified.

The concentration of lead in whole blood, usually reported in micrograms per deciliter; it is the standard biomarker of exposure but reflects recent exposure and only part of total body burden.

A blood lead result at or above CDC's current blood lead reference value of 3.5 micrograms per deciliter, the level used to identify children with greater lead exposure than most U.S. children.

Severe brain dysfunction caused by high lead exposure, with symptoms such as confusion, seizures, coma, or death; it is typically seen at blood lead levels above 70 micrograms per deciliter.

Groups more vulnerable to lead, especially children under six and fetuses, whose developing nervous systems and higher absorption increase risk, along with pregnant women and people with poor nutrition or pica.

A portable instrument that measures lead in paint in place by detecting characteristic X-rays emitted from the surface; readings are reported in milligrams per square centimeter and require calibration checks.

A measurement of a known reference standard made before testing and at required intervals to confirm that an XRF analyzer is accurate and stable; a failed check means readings cannot be relied on.

An adjustment applied when the material beneath the paint, such as brick, concrete, or metal, contains lead and inflates XRF readings, so the result reflects the paint rather than the substrate.

A false positive is an XRF reading at or above the lead-based paint threshold when the paint is actually below it; a false negative is a reading below threshold when the paint exceeds it.

Removal of a measured area of paint and substrate, often with a coring tool, for laboratory analysis; used to confirm XRF readings, test inaccessible components, and validate instrument results.

A surface-by-surface investigation using XRF and paint chip sampling to determine the presence and location of lead-based paint; unlike a risk assessment, it does not evaluate hazards or occupant exposure.

Collection of settled dust from a measured surface area with a treated wipe for laboratory analysis; results are reported in micrograms of lead per square foot and compared with clearance or hazard standards.

Mixing samples collected from several similar surfaces or locations into one container for a single laboratory analysis; it lowers cost but produces an average that can hide a high-lead location.

Post-work numerical limits for lead in settled dust, currently 40 micrograms per square foot on floors, 250 on interior window sills, and 400 on window troughs, plus visual cleanliness criteria.

Collecting soil, usually from bare areas and play areas, at a specified depth for laboratory analysis in parts per million; results are compared with the 400 ppm play-area and 1,200 ppm other-area standards.

A water sample taken from a tap that has been closed at least six hours, capturing water that stood in contact with pipes and solder; used to assess lead in drinking water.

EPA's National Lead Laboratory Accreditation Program, which recognizes laboratories that meet performance standards for analyzing lead in paint, dust, soil, and water samples.

An on-site investigation that determines whether lead-based paint hazards exist, how severe and where they are, and how occupants may be exposed, ending with a written report and recommendations.

A structured discussion with residents about occupant ages and health, cleaning and water-use habits, renovation history, and areas of concern, used to understand exposure patterns during a risk assessment.

The written product of a risk assessment documenting site conditions, sampling results, hazard determination, exposure evaluation, and prioritized recommendations, along with limitations and signatures.

Any condition that causes exposure to lead from deteriorated paint, dust, or bare soil, including friction and impact surfaces and chewable surfaces, at levels that may cause adverse health effects.

Friction surfaces rub against other components, such as window sashes and door edges; impact surfaces are struck by moving parts, such as door frames. Both abrade paint and generate lead dust.

Paint that is cracking, peeling, chipping, flaking, or chalking, or otherwise failing to adhere to the surface; it is a hazard because it produces lead dust and chips.

Temporary, non-permanent measures such as cleaning, paint stabilization, and repair that reduce lead exposure until abatement occurs; they require ongoing maintenance and reevaluation to remain effective.

A set of measures designed to permanently eliminate lead-based paint or lead hazards, including removal, enclosure, encapsulation, component replacement, and cleanup, performed by certified firms and workers.

The visual and dust-wipe evaluation performed after abatement, renovation, or interim controls to confirm that hazards, dust, debris, and residue are gone and that clearance standards are met.

Methods such as misting, wet scraping and sanding, and containment that keep lead dust from becoming airborne or spreading outside the work area during abatement or renovation.

A documented, unbroken record of everyone who collected, handled, transported, and analyzed a sample, with dates and signatures; it establishes sample integrity and makes results defensible.

A situation in which a person's financial or personal interests could bias findings or recommendations, such as an assessor who also sells abatement services; it must be avoided or fully disclosed.

Planned management activities and specific checks, including instrument calibration, blanks, duplicates, and audits, used to show that sampling and laboratory data are accurate, precise, and defensible.

Statements describing the scope of work and its limits, noting that findings reflect conditions at the time of assessment and that concealed hazards may exist, so readers do not over-rely on the report.