Auckland Council's compliance and resource consents manager Sefan Naude said the fire service and council staff had inspected the site and confirmed that a small amount of fuel was spilled on an area of scoria.
"There is no evidence that the spill went beyond the site into the environment or the sea," he said.
"The fire service is satisfied that the spill does not pose any risk and have withdrawn from the site. The council does not consider any further action is required at this stage."