Document peb44MXw841VX1DEG5wa8pZ8B

August 21th 1979 Dr Robert A. Kehoe Kettering Laboratory Department of Environmental Health University of Cincinnati College of Medecine Cincinnati 45219 USA Dear Dr Kehoe, I am the president of the union of employees working at the Carter White Lead company in Montreal. We are continually exposed to lead and submit to monthly evaluations of our blood lead levels. It is my understanding that the company doctor decides an employee is poisoned and should stop work 1- if his blood lead (repeated at least once) is above 800mgm/l 2- if his blood lead level is between 600 and 800mg/l and at the same time there is presence of an anemia or an elevated B.U.N. We would very much like to have your expert opinion on these criteria. Are these sufficient for determing lead intoxication? Could a person not have a blood lead of 700mgm, without an anemia or an elevated B.U.N. and still be intoxicated? Should not the medical criteria for intoxication also take into account the employee's subjective symptoms? Your answer will greatly help us in our efforts to improve our employee's health. Sincerely