Laboratory-analyzed dust wipe sampling to measure lead contamination on floors, sills, and surfaces — and to verify effective cleanup after renovation or remediation.
Lead dust is one of the most significant — and most overlooked — routes of lead exposure. Unlike intact paint, lead dust is invisible, settles on floors and window sills, and is easily ingested by young children through normal hand-to-mouth behavior. You can't see it, and you can't measure it by looking. Dust wipe sampling is how it gets quantified.
In a dust wipe sample, a measured area of a surface — typically a floor, a window sill, or a window trough — is wiped with a specialized wipe under a controlled procedure. That wipe is then sent to an accredited laboratory, which measures exactly how much lead is present per unit of area. The result is a hard number you can compare against established standards, rather than a guess.
Dust wipe sampling serves two main purposes: measuring existing contamination to understand a current hazard, and clearance testing — verifying that a space has been properly cleaned after renovation, repair, or lead abatement work. Comprehensive Environmental Services performs both across New Jersey, with sampling carried out personally by Neheru Singh, an EPA-certified lead inspector licensed since 2013 (NJ LIRA #027180), and analysis handled by an accredited lab.
After renovation or lead work, a space can look spotless and still carry hazardous lead dust at levels invisible to the eye. The only way to know a property is genuinely safe to re-occupy is to measure it against established standards — and that's exactly what clearance sampling does.
Because Comprehensive Environmental Services performs sampling and testing only, never the cleanup or abatement itself, the clearance results are genuinely independent. The party verifying the work is clean is never the party that did the work — which is exactly how clearance testing is supposed to function.
Dust wipe sampling is a precise, lab-backed process — here's what it covers and where the samples come from.
Floors are a primary collection point for settled lead dust and a key exposure surface for crawling children. Measured-area floor wipes are a standard part of both hazard assessment and clearance testing.
Window sills and troughs are among the highest-concentration areas for lead dust, generated by the friction of opening and closing older windows. They're a critical sampling location.
Every wipe is sent to an accredited laboratory that measures the lead content per unit area. You get a documented, defensible number — not an on-site estimate.
For clearance testing, results are compared against established standards to verify a space has been properly cleaned and is safe to re-occupy after renovation or remediation.
Anyone who needs to measure lead dust — or prove a space is clean after work — benefits from lab-verified dust wipe sampling.
Work that disturbs old paint generates lead dust. Clearance sampling verifies the space was properly cleaned before people move back in.
Independent clearance testing confirms that lead abatement work achieved the required standard — verified by someone other than the contractor who did the work.
If there are young children in an older home, dust sampling measures the actual contamination on the surfaces they touch most.
Property owners who need documented, lab-backed evidence of dust-lead levels for tenant safety or compliance purposes.
Renovation contractors working in pre-1978 properties often need independent post-work clearance sampling to document a clean result.
If there's been a known or suspected lead exposure, dust sampling helps pinpoint contaminated surfaces so they can be addressed.
Neheru keeps the process precise and clear — controlled sampling, accredited lab analysis, and a result you can act on.
Call (908) 524-1676. Neheru confirms whether you need contamination measurement or post-work clearance, and how many samples are appropriate.
On-site, measured-area wipes are collected from floors, sills, and troughs under a controlled procedure to ensure accurate, defensible results.
Samples are submitted to an accredited laboratory that measures the lead content per unit area — the hard data behind the result.
You receive a clear report with the lab results and, for clearance work, whether the space met the standard — typically within 10 business days, rush available.
Real reviews from New Jersey homeowners, landlords, and contractors who have trusted Comprehensive Environmental Services for dust sampling and clearance testing.
"After our renovation, we wanted to be sure the house was actually safe for our kids — not just looking clean. Neheru's clearance sampling gave us lab-verified numbers and real peace of mind. Worth every penny."
— Satisfied Client
New Jersey
"As a contractor I need independent clearance testing I can hand to clients with confidence. Neheru is precise, fast with the lab turnaround, and his documentation is exactly what I need to close out a job properly."
— Satisfied Client
New Jersey
"Professional and thorough. He explained why the window areas matter so much and what the lab numbers actually meant. I finally understood the dust-lead issue instead of just worrying about it."
— Satisfied Client
New Jersey
Answers to the questions New Jersey property owners most often ask about lead dust sampling and clearance testing.
A measured area of a surface — usually a floor, window sill, or window trough — is wiped with a specialized wipe following a controlled procedure. The wipe is then sent to an accredited laboratory that measures how much lead is present per unit of area. It turns invisible dust into a hard, comparable number.
Both use the same wipe method. Sampling generally means measuring existing contamination to understand a hazard. Clearance means testing after renovation or abatement to verify the space has been properly cleaned and meets the standard for re-occupancy. Neheru will confirm which fits your situation.
XRF testing reads lead in paint on-site, but measuring lead in dust requires laboratory analysis to quantify it accurately per unit area. That lab step is what makes the result defensible and comparable to established standards — which is essential for clearance.
No — and that's the point. Clearance testing is meant to be independent. Comprehensive Environmental Services does sampling and testing only, never the cleanup or abatement, so the party verifying the result has no stake in the outcome. That independence is what gives the clearance its credibility.
It depends on the size of the area and the purpose — a single room's clearance needs fewer samples than a whole-home assessment. Neheru will scope the right number when you call so you're not paying for more than your situation requires.
Because samples go to an accredited lab, there's a turnaround period, with reports typically delivered within 10 business days (rush available). Pricing depends on the number of samples and the scope, so call (908) 524-1676 for an accurate quote.
Dust wipe sampling and clearance testing available statewide. Explore the New Jersey communities we serve.
EPA Certified • NJ LIRA #027180 • Licensed Since 2013 • Residential & Commercial • Serving All of New Jersey