"EPA Plans to Expand Lead Monitoring Network"

"To ensure that the most vulnerable Americans are better protected from exposure to lead, the U.S. EPA is proposing to revise the monitoring requirements for measuring airborne lead. ...

The agency is proposing to require air quality monitoring around sources that emit a half ton or more of lead a year, lowering the current threshold from one ton a year to include more sources. "

Environment News Service had the story December 30, 2009.