EPA Regulatory Limits:
40 ug/ft2 (Floors, Carpeted/Uncarpeted), 250 ug/ft2 (Window Sill/Stools), 400 ug/ft2 (Window Trough/Well/Ext Concrete Surfaces).
Federal Regulations
Federal regulations require that home sellers provide lead disclosures to home buyers who are purchasing a home built before 1978, however lead may be present in newer homes as well so testing is advised. One of the first things many people do when moving into a new house is to start painting and remodeling which can cause lead based paint chips or Lead Based Paint (LBP) dust that can be ingested by occupants.