A Ramsey County judge will decide whether to keep a manufacturing plant closed after tests found high levels of toxic metal in the children of some employees.

State regulators this week ordered the shutdown of Water Gremlin in the Twin Cities area. The company uses lead to make car battery terminals and fishing weights. Investigators say workers were bringing lead dust home on their shoes and clothing.

Labor and Industry Commissioner Nancy Leppink used her authority to order the White Bear Township company to close temporarily. Leppink is asking the judge to extend the shutdown until the company takes the necessary steps to protect workers’ children. Minnesota Public Radio News says that the decision could come Thursday.

Water Gremlin says it’s working cooperatively with government officials.