A Telford-based company has been fined £11,000 and ordered to pay costs of £1,742 for failing to ensure its waste was disposed of safely.
GKN Off Highway Systems was found guilty at Telford Magistrates on three charges under the Special Waste Regulations Act 1996.
The charges relate to reports from members of the public of pink liquid escaping from skips passing through Telford.
The hazardous liquids require a waste license and documentation giving full descriptions to ensure they are sent to the correct site for disposal.
An Environment Agency spokesperson said: "GKN off Highways Systems failed to do this, triggering off a sequence of events which led to a real risk of pollution and harm to human health."
The Environment Agency has urged any company arranging for the disposal of waste to call them on 08708 506 506 for advice on how this should be done properly.