Ports are important facilities that handle all kinds of goods and products. In the north of France, the main products that are shipped are foodstuffs and oil products as well as ore and coal. Several cranes operate every single day and transport the goods from ships to land.

Tetra Technologies, East Chicago, Ind., processes mill scale from steel making and rolling to separate the oil and steel filings. Mill scale is jagged, irregular shaped steel filings that range in size from 8-mesh to 8-microns, and according to a Tetra Waste Management Division representative, "will tear up anything."