EPA Proposes to Expand the Lead Monitoring Network /Proposed changes would help determine if areas meet air quality standards for airborne lead
12/23/2009
http://yosemite.epa.gov/opa/admpress.nsf/6424ac1caa800aab85257359003f5337/273471811c70d63485257695006244b3!OpenDocument
官報掲載から45日間意見を受け付ける
詳細は以下より
Lead in Air
http://epa.gov/air/lead/
