Calypso Waterpark in Limoges, Ontario, Canada, is under investigation following a chlorine leak that sent 13 children to the hospital in August, according to local news reports.

Meanwhile, a July water-slide crash at the park injured two men, and operators have since been named in two unrelated lawsuits alleging negligence.

A 48-year-old woman claims she was thrown from her seat on a raft ride in 2010 and sustained facial injuries that have caused permanent disfigurement and depression. Another female is claiming pain and suffering after sustaining a broken collarbone on a water slide. Her statement alleges that the waterpark, one of Canada’s largest theme parks, failed to properly inspect the ride.

The Technical Standards and Safety Authority, which administrates theme parks, is overseeing the inquiry.