5.1 Abatement vs Interim Controls vs RRP

Design, not dust, is what makes a job abatement

Quick Answer: Abatement is any measure or set of measures designed to permanently eliminate lead-based paint hazards, and in the case of dust-lead hazards to below the action levels (40 CFR 745.223). It includes paint and dust removal (dust to below action levels), permanent enclosure or encapsulation, replacement of painted surfaces or fixtures, and removal or permanent covering of soil when LBP hazards are present, plus all preparation, cleanup, disposal, and post-abatement testing. It does not include renovation designed to repair, restore, or remodel, and it does not include interim controls or other temporary reductions.

This is the sorting rule for the rest of the supervisor exam. If the work is abatement, you need a certified supervisor, a certified firm, a 5-business-day notice, an occupant protection plan, 745.227 work practices, and post-abatement testing by a certified inspector or risk assessor. If it is Renovation, Repair, and Painting (RRP) under Subpart E, a certified renovator and an RRP firm run lead-safe work practices that are not designed as permanent hazard elimination. If it is interim controls, the measures are temporary by definition. Mis-labeling the job is how people staff the wrong credential, skip EPA abatement notification, and treat a kitchen remodel as a clearance event — or treat an abatement order as an RRP window swap.

The current definition is not “get the lead out of the building.” Permanent elimination of hazards is the target. For dust-lead, that target is below the action levels, not “zero lead dust.” Action levels on or after January 12, 2026 are 5 µg/ft² on floors, 40 µg/ft² on interior window sills, and 100 µg/ft² on window troughs (745.227(e)(8)(viii)). Section 5.3 and Chapter 18 own those numbers; this section owns the design test that decides whether you are even in the abatement rule.

What 745.223 includes — methods and the four paper tests

Included methods (745.223, abatement paragraphs (1) and (2)):

• Removal of paint and dust (dust-lead to below the action levels).
• Permanent enclosure or encapsulation of lead-based paint.
• Replacement of painted surfaces or fixtures.
• Removal or permanent covering of soil when LBP hazards are present in that paint, dust, or soil.
• All preparation, cleanup, disposal, and post-abatement testing tied to those measures.

Encapsulation is the application of an encapsulant — a substance that forms a barrier between LBP and the environment using a liquid-applied coating (with or without reinforcement) or an adhesively bonded covering (745.223). Enclosure is rigid, durable construction material mechanically fastened to the substrate as a barrier. Permanently covered soil is a barrier of solid, relatively impermeable materials such as pavement or concrete. Grass, mulch, and other landscaping are not permanent covering. How to install enclosure and encapsulant systems is Chapter 12; how to remove or pave soil is Chapter 15. Here, know that those methods are abatement when they are designed as permanent hazard elimination, and that planting grass over 1,400 ppm play-area soil is not soil abatement.

Four paper tests (745.223, abatement paragraph (3)). Projects that result in, or are designed to result in, permanent elimination of LBP hazards (dust below action levels) are abatement when any of these is true:

You do not need all four. One is enough when the work is designed as permanent elimination. The order prong is especially blunt: the contractor does not get to re-label a court-ordered abatement as “RRP window replacement” because the crew prefers the lighter rule.

What 745.223 excludes — remodel side effects and temporary measures

Paragraph (4) is the safety valve, and exam items live here.

Abatement does not include renovation, remodeling, landscaping, or other activities when those activities are not designed to permanently eliminate LBP hazards (dust below action levels) but are instead designed to repair, restore, or remodel a given structure or dwelling, even though they may incidentally reduce or eliminate hazards.

Abatement also does not include interim controls, operations and maintenance (O&M), or other measures designed to temporarily, but not permanently, reduce LBP hazards (dust below action levels).

Interim controls (745.223) are a set of measures designed to temporarily reduce human exposure or likely exposure to LBP hazards, including specialized cleaning, repairs, maintenance, painting, temporary containment, ongoing monitoring of LBP hazards or potential hazards, and management and resident education programs. Paint stabilization — repairing deteriorated LBP and repainting it so the coating is intact for now — is the classic interim-control example. It is not encapsulation unless you are applying a true encapsulant as a permanent barrier. Ordinary latex over deteriorated sash that will be painted again next year is interim. A specified encapsulant system with a monitoring schedule in the abatement report is abatement (Chapter 12).

RRP lives in 40 CFR 745 Subpart E, not in this supervisor rule. It covers renovation, repair, and painting that disturbs lead-based paint in target housing or a child-occupied facility and is not performed as part of an abatement. Typical RRP: kitchen gut-rehab, bathroom remodel, window repair for energy or rot, weatherization that cuts painted surfaces, and interim controls that disturb paint. RRP uses certified renovators and RRP firms. That is a different card. A person may hold both credentials; the job classification still chooses the rule. An RRP renovator certificate does not authorize you to supervise abatement. Subpart L does not let you skip 745.227 because “we also have RRP cards on the truck.”

Decision tree for the bid folder

Walk the file in this order. Do not start with “did we make the dust number better?”

1. What is the work designed to do? Permanent elimination of LBP hazards (dust below action levels) → stay on the abatement path. Repair/restore/remodel → not abatement, even if a leaded sash leaves the building. Temporary reduction → interim controls.
2. If the design is permanent elimination, does any paper test apply? Written contract/docs, certified-firm project (unless paragraph (4) saves it), advertising as an LBP-activities business, or a state/local abatement order.
3. Which credential matches that design? Abatement supervisor and certified firm, or RRP renovator, or a property-management interim-control crew. The wallet can hold two cards; the scope of work still has to match one rule.
4. Do not convert a remodel into abatement after the fact because dust dropped, and do not convert an abatement order into RRP because the methods look like carpentry.

Worked examples

Kitchen remodel that happens to remove a window. Owner of a 1968 duplex hires a kitchen contractor. The contract says “remodel kitchen, replace cabinets, counters, and one west window for energy efficiency.” The old sash tests as LBP. The new vinyl window has no LBP. Dust in the kitchen will likely fall. Not abatement. Design is remodel. Incidental hazard reduction does not flip the rule. If painted surfaces are disturbed in target housing, RRP applies. Do not file a 5-business-day abatement notice and do not self-clear against 5/40/100 as if this were 745.227(e).

Same window, different paper. The owner’s risk-assessment report lists friction-sash paint-lead hazards and dust-lead on the sills. The contract says the certified firm “shall permanently eliminate the identified LBP hazards, replace all living-room and kitchen window assemblies, and achieve dust-lead below the action levels.” Abatement. Test (i) is met. You staff a certified supervisor, notify EPA, write an occupant protection plan, and bring a certified inspector or risk assessor for post-abatement testing.

Paint stabilization. Peeling living-room walls: wet-scrape loose paint, repair, and repaint with ordinary interior latex so the coating is intact, with a plan to monitor and repaint as needed. Interim control. Temporary. Not enclosure, not encapsulant-as-abatement. If the work disturbs LBP in target housing, RRP likely also applies. It is not a Subpart L abatement unless the documents redesign it as permanent elimination (for example, a specified encapsulant system designed as a permanent barrier).

Abatement order. The local health department orders the landlord to abate named window troughs and interior dust after an EBL child. The contractor would have preferred to call it “window restoration.” Abatement under test (iv). The order, not the contractor’s marketing, classifies the job.

Advertising trap. “Metro Lead Abatement Co.” promotional literature offers “permanent lead hazard elimination.” The firm then replaces LBP windows under that pitch. Test (iii) is in play. You cannot hide behind “it was really just a remodel” while the website sells abatement.

Certified crew on a remodel. A certified abatement supervisor moonlights on a kitchen gut that is documented only as remodel. Paragraph (4) still excludes work designed to remodel. Holding the supervisor card does not automatically convert every painted-component removal into abatement. Conversely, showing up as an RRP renovator on a written abatement contract does not convert abatement into RRP.

Soil “cover” with mulch. The yard has a soil-lead hazard. The owner wants three inches of mulch and new sod. That is landscaping, not permanent covering, and it is not soil abatement. Pavement or concrete would be permanent covering (and abatement if designed to eliminate the soil-lead hazard). Grass and mulch remain interim-style covers; Chapter 15 returns to the 400 ppm replacement rule.

Carry this chapter’s question into every later method chapter: is this designed as permanent elimination, temporary reduction, or a remodel that merely disturbs paint? Methods, containment, and clearance only make sense after that answer.