Mitigation and testing certifications
The entries below are registered in York and dated 1 September 2026. Every one of them belongs to a named individual rather than to the business, which is worth knowing when you ask whose number covers your job.
| Cert number | Held by |
|---|---|
| 1966 | ABSOLUTE RADON MITIGATION, LLC |
| 1965 | SCHLALINE, JEFFREY |
| 7244 | RICHARD, TROY |
| Cert number | Held by |
|---|---|
| 1965 | SCHLALINE, JEFFREY |
Why the York address matters
Every other mitigation firm in this guide is based in Camp Hill, Mechanicsburg, Harrisburg or Allentown and reaches York County as part of a wider radius. Absolute is on Locust Grove Road in York itself.
That changes scheduling more than it changes price. The county median of $1,150 applies to whoever installs the system, and the York County cost record shows no premium for distance. What a local base does affect is how quickly a crew can fit in a survey, and how easy it is to get somebody back if the post-mitigation test comes in higher than expected.
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The three certifications, and why there are three
Pennsylvania certifies firms and individuals separately, which is why one company can appear three times. The firm certification covers the business; the individual ones cover the people doing the work.
When you ask for a certification number, the useful question is which of these the person on your job actually holds. A firm number on the quote and an uncertified person on the roof are not the same thing.
Who runs it and how a job is priced
Jeff Schlaline founded Absolute Radon Mitigation in December 1999 and, by the firm's own account, still owns and runs it. The firm describes itself as locally owned in York since 1999 and as a member of the York Builders Association.
Its stated process has three steps. The firm visits the house first, gives a written price for the whole job before work begins, and retests once the fan has run for at least 24 hours. Services listed are mitigation systems, fan replacement, testing, sump pit sealing, crawl space systems and radon work for home sales.
The firm names York, West York, North York, East York and the Spring Garden, Springettsbury, Manchester, West Manchester and York townships as its coverage. Warranty and insurance wording does not appear on its homepage, so ask for both in writing. These details are stated by the firm and were read on 4 November 2026.
How that compares
Of the 21 mitigation certifications held by the eight firms in this guide, 3 belong to this one, or 14 percent. 5 of the eight hold any mitigation certification at all. It is also one of 4 firms here carrying testing certifications, with 1 of the 14 in that register.
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Verify it before you book
Treat the list above as evidence about 1 September 2026 rather than about today, because certifications renew on their own cycles. Firm number 1966 is the one to quote when you check, by register or on 800-237-2366. What certification covers, and what it deliberately does not, is on our page about it.
Common questions about Absolute Radon Mitigation LLC
Is Absolute Radon Mitigation DEP certified?
Absolute Radon Mitigation is DEP certified. The September 2026 register lists three mitigation certifications tied to the firm: 1966 for Absolute Radon Mitigation LLC, 1965 for Jeffrey Schlaline and 7244 for Troy Richard. Number 1965 also appears in the testing register.
Are they based in York?
Absolute Radon Mitigation is based in York, on Locust Grove Road in York, PA 17402. It is the only mitigation firm in this guide with a York city address rather than a service area that reaches into York from elsewhere.
Do they test as well as mitigate?
One of the three, Jeffrey Schlaline under number 1965, appears in the testing register as well. The firm number itself is a mitigation certification. Ask which applies if you need both.