Environment department investigators have rushed to the site of a potential chemical spill from an explosives storage plant at the site of a proposed super dump in Ipswich.

Photographs have emerged over the weekend showing a spill of liquid from a storage area in the suburb of New Chum – near Swanbank – into an abandoned mine.

The Ipswich City Council and the Department of Environment and Science were unaware of the leak until it was reported to both the council and the department by Fairfax Media on Friday.