In March 2012, the Health Hazard Evaluation Program received a request from the owners of an aircraft repair and flight school facility in Colorado to evaluate employee lead exposures. This was in response to concerns about lead exposure which began when a child who was at the worksite nearly every day was found to have a blood lead level (BLL) above 10 micrograms per deciliter ( g/dL); the CDC "level of concern" at the time of the site visit CDC 1991]. The owners and employees were subsequently tested and found to have had BLLs less than 10 g/dL; the National Institute for Occupational...