(AP) — A former lead recycling company may have left behind higher-than-normal lead levels in residential yards in a Lincoln neighborhood.

Recent state testing showed lead in the soil under the parking lot next to the Nebraska Champions Club at Memorial Stadium and in the yards of some homes in the North Bottoms neighborhood to the northwest.

Dirt from nine of the 20 homes had lead content above 400 parts per million, the level the federal government says could be dangerous for small children.

The old Northwestern Metal Co. once stood near the stadium, at Ninth and T streets.

Nebraska’s Department of Environmental Quality says more tests will be necessary to determine the scope and seriousness of any contamination.