A court has urged New Jersey regulators to flesh out rules on radon measurement and mitigation in response to a dispute with the state’s largest radon testing company.

In a Nov. 2 decision, the New Jersey Superior Court Appellate Division partially affirmed, partially reversed, and remanded a decision by the Commissioner of the Department of Environmental Protection (DEP) against Radiation Data Inc. of Skillman.

“The DEP is also urged to engage in prospective rulemaking,” the court concluded