A nearly $40,000 cleanup is set to begin at a Lawrence community building that was found to have high levels of lead.

Since the lead contamination was discovered this year, the basement room at the Community Building has been locked up. Professional decontamination is set to begin Monday. Mark Hecker, assistant director of the Lawrence Parks and Recreation Department, told The Lawrence Journal World  the work will involve removing all the surfaces, cleaning and repainting.

The approximately 1,400-square-foot space housed a gun range that left behind extremely high levels of lead contamination. The lead contamination built up as bits from lead bullets accumulated as patrons fired their weapons.

In May, tests found lead in some areas that was 17,000 times greater than what’s considered safe.