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How to tell an asbestos testing company from a removal crew, a mold company or a home inspector, and what to ask for before anyone samples your older house.

Pick a lead paint abatement company by the job: the right certification, a written scope with containment and cleanup, and a clearance test done by someone else.

A positive asbestos test means you hire an abatement contractor, not a tester or remodeler. Check the state registry, then compare written work plans.

Clearance testing is how you prove mold remediation succeeded before you pay the final bill. Learn what post-remediation verification involves, what passing looks like, what it costs, and why an independent tester matters.