It sounds like it only builds to dangerous levels when you are constantly exposed to high levels. A study cited on Wikipedia states that most hunters have lower lead levels in their blood than most US citizens.
JYD#176 "dein Gott schickte mich zu zerstören" "Sic semper evello mortem Tyrannis" "Sometimes the chance of a zombie outbreak is the only reason I need to make many of my life's Decisions." General Delivery
