Lead testing is particularly important before disturbing painted surfaces in older buildings.
Renovation activities such as sanding, scraping, cutting, drilling, window replacement, demolition, and paint removal can generate lead-contaminated dust if lead is present.
Federal EPA Renovation, Repair and Painting requirements and California occupational and public-health requirements may apply depending on the building, work, and individuals performing it.
Testing before construction can help determine where lead is present so the contractor can plan appropriate work practices and containment before dust is generated.
For homeowners, it can also prevent unexpected delays once renovation has already started.