CNN Article - U.S. standards on beef are lax, inspector general says

By Dugald McConnell
Published April 14, 2010

The U.S. government is not fully guarding against the contamination of meat by traces of antibiotics, pesticides or heavy metals, a new report warns. The U.S. Department of Agriculture's inspector general said federal agencies have failed to set limits on many potentially harmful chemical residues, which "has resulted in meat with these substances being distributed in commerce."

http://www.cnn.com/2010/US/04/14/us.beef.testing/?hpt=T2