An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Risk Assessment

Sample Analysis and Quality Assurance Plan for Urinary Arsenic and Blood Lead Among Residents of VB170 Neighborhoods, June 2002