To screen for lead exposure indicated by elevated levels of lead in your blood. Lead and organic lead compounds have numerous commercial and industrial applications, including paints, plastics, storage batteries, bearing alloys, insecticides, and ceramics. Exposure may also occur through the inhalation of dust containing lead emitted by automobile exhaust. A common source of lead exposure among children is through the mouthing of inanimate objects, specifically objects with paint and paint chips that contain lead.