A Frisco citizens' group, Frisco Unleaded, claims the city’s Exide plant has put 300,000 pounds of lead dust into the air over 48 years. But a government agency says those numbers may not add up. The citizens' group sent out an alarming flier (pictured) to 33,000 homeowners. It shows a map of the area impacted by lead pollution from Exide's battery recycling plant. It's more than double the size if the federal government's map.