The lead industry challenged the EPA’s establishment of a primary air quality standard for lead that incorporated an “adequate margin of safety.”In setting the standard, the EPA had not considered the...

The lead industry challenged the EPA’s establishment of a primary air quality standard for lead that incorporated an “adequate margin of safety.”In setting the standard, the EPA had not considered the feasibility or the cost of meeting the standards. Must the EPA take such factors into consideration in setting primary air quality standards?