18.2 Post-Abatement Visual, Dust Sampling, Independence, and the 1-Hour Wait

The supervisor does not wipe the job the supervisor just cleaned

Quick Answer: 745.227(e)(8) opens with a discipline lock: post-abatement procedures shall be performed only by a certified inspector or risk assessor. That includes the visual and the dust sampling. 745.227(f) repeats that paint-chip, dust, or soil samples under these work-practice standards are collected by a certified inspector or risk assessor and analyzed by a laboratory recognized by EPA under TSCA section 405(b) (NLLAP). Visual first: no deteriorated paint and no visible dust, debris, or residue, or eliminate those conditions before sampling continues ((e)(8)(i)). Wipes wait a minimum of 1 hour after final post-abatement cleanup ((e)(8)(iv)). Single-surface or composite is allowed. With containment, sample one interior sill and one trough if present, floors of no less than four rooms/halls/stairs inside containment (or all if fewer), plus one floor sample outside the containment area. Without containment, two dust samples from each of no less than four rooms (sill and trough if present, and floor). A certified supervisor shall be onsite during post-abatement cleanup (745.227(e)(2)) and still cannot self-clear.

Chapter 14.2 taught the visual gate as a cleanup-management rule. This section is the sampling plan and the independence rule the exam will put next to 5 / 40 / 100. Who holds the wipe, who runs the lab, how many rooms, and why there is a floor sample outside the plastic are 18.2. Composite arithmetic, failed-sample reclean, exterior visual, and multi-family random sampling are 18.3. The abatement report is 18.4.

Independence: inspector or risk assessor, NLLAP lab, no supervisor ghost wipes

Certified inspector and certified risk assessor are the only people 745.223 and 745.227(e)(8) authorize to sample dust and soil for abatement-related testing. A certified supervisor prepares occupant protection plans and abatement reports and runs the job. That is a different discipline. Holding a supervisor card does not authorize post-abatement wipes. Holding an RRP renovator card or a dust sampling technician credential used on some HUD / RRP jobs does not satisfy 745.227(e)(8).

745.227(f) is the chain-of-custody sentence:

1. Collected by persons certified as an inspector or risk assessor.
2. Analyzed by a laboratory recognized by EPA pursuant to TSCA section 405(b) as capable of performing analyses for lead in paint chip, dust, and soil — the National Lead Laboratory Accreditation Program (NLLAP) list.

A field kit, an XRF dust reading, a contractor's in-house wipe sent to a non-recognized lab, or the supervisor "helping" because the assessor is stuck in traffic does not become post-abatement testing because the numbers look official.

Worked example — supervisor self-clear. Cleanup finished. The risk assessor cancelled. The supervisor, certified only as a supervisor, wipes four floors and two sills, drives them to an NLLAP lab, and puts the results in the abatement report. The lab is recognized. The collector is not an inspector or risk assessor. (e)(8) and (f) both fail. Redo the visual and the wipes with the right person. Do not paper over it.

Worked example — same human, two cards. The project supervisor also holds a current risk-assessor certification. (e)(8) is a function lock, not a "two hats in one skull is always forbidden" sentence. Using a separate inspector or risk assessor is still the cleaner independence story, and owners and HUD programs often require it. What you cannot do is treat supervisor-only certification as a sampling license.

Visual first, then the hour, then the wipe

(e)(8) is ordered on purpose:

1. Visual inspection for deteriorated painted surfaces and/or visible dust, debris, or residue. If present, eliminate those conditions prior to continuation of post-abatement testing ((e)(8)(i)).
2. Then dust sampling, single-surface or composite ((e)(8)(ii)), using documented methodologies with adequate quality control ((e)(8)(iii)).
3. Samples taken a minimum of 1 hour after completion of final post-abatement cleanup activities ((e)(8)(iv)).

A failed visual is not a wipe with a footnote. Sampling does not continue. Recleaning after a failed visual is post-abatement cleanup; the supervisor is onsite for it. The 1-hour clock starts from final cleanup — the reclean — not from the first mop that left grit in the trough.

Do not collapse two different hours. HUD documented methodology tells you to wait after paint-disturbing work so dust settles before final cleaning. 745.227(e)(8)(iv) is a different hour after that cleaning, before samples. Honoring the settle hour and then wiping 20 minutes after the last pass still violates (e)(8)(iv).

Worked example — keys at 3:00. Cleanup ended at 2:15. Visual is clean. The assessor is in the driveway. Wipes at 2:20 are early. Wait until at least 3:15. The owner's move-in time is not a documented methodology.

How many samples — containment versus no containment

(e)(8)(v) splits on whether you built containment between abated and unabated areas. Rooms, hallways, or stairwells selected for sampling are selected according to documented methodologies ((e)(8)(vi)) — HUD Guidelines and EPA residential sampling protocols, not "the prettiest room."

The outside-containment floor is the leak detector. Plastic and tape are not magic. If containment failed, lead dust walked. That single floor wipe outside the containment area is how (e)(8) looks for it. Skipping it because "we taped well" is an (e)(8)(v)(A) miss even if every interior floor is 2 µg/ft².

Worked example — contained bedroom plus hall, two rooms total inside. Window replacement ran in a taped bedroom and the hall that served it. Only two rooms/halls are inside containment. (e)(8)(v)(A) says if fewer than four spaces are inside, sample all of them: floor in the bedroom, floor in the hall, one interior sill, one trough if present, plus the floor outside containment (typically the first unabated room or corridor beyond the critical barrier). You do not invent two extra interior rooms that were never in the work area just to reach four. You also do not skip the outside floor because you only had two interior spaces.

Worked example — whole-unit abatement, no containment. Four rooms plus a stair. No plastic between abated and unabated space because the whole unit was the work area. (e)(8)(v)(B): at least four rooms/halls/stairs; from each selected space, floor plus sill and trough if present. If the unit only has three rooms, sample all three. Do not pull a neighbor's apartment to make four.

Worked example — contained living room in an occupied unit. One living room contained; kitchen and bedrooms occupied and outside the plastic. Inside containment there is one room — sample that floor, the sill, the trough if present, and one floor outside containment (kitchen or hall beyond the barrier). Occupied rooms that were never inside the containment area are not "the four rooms" of (v)(A). The four-room count is within the containment area, with the all-if-fewer rule, plus the outside floor.

Single-surface versus composite is a technique choice under (e)(8)(ii). Composite rules and the fail math live in Section 18.3. Either way, documented methodologies pick which rooms. Do not always wipe the room you cleaned best and skip the stair you used as a staging dump.

Supervisor decision test before you call the assessor. (1) Was the certified supervisor on site for the entire final cleanup? (2) Is the room visually empty of deteriorated paint, dust, debris, and residue on a HUD preliminary look? (3) Is the person coming an inspector or risk assessor, not a technician and not you? (4) Will wipes wait ≥1 hour after final cleanup? (5) If you used containment, does the plan include the outside floor? (6) If you did not, does the plan take two samples from each of at least four rooms (or all if fewer)? (7) Is the lab on the NLLAP list?

Official sources: 40 CFR 745.227(e)(2), (e)(8), (f) (supervisor on site for cleanup; inspector/RA-only post-abatement procedures; visual; 1-hour wait; containment vs no-containment sampling; NLLAP / TSCA 405(b) analysis); 40 CFR 745.223 (inspector and risk assessor sample dust for abatement-related testing).