1. Water treatment at the Avenue

2. The Avenue Coke Works Processed coal to produce coke Coke used as a smokeless fuel and in the steel-making industry Wastes from the process left behind when the works closed in 1992

3. Contaminated water Large ponds or lagoons containing oil-contaminated water Rainwater run-off collected from working areas

4. Water treatment plant Contaminated water is cleaned at the water treatment plant

5. Water treatment plant Dirty water is collected Oil is skimmed off from the surface Sediments are allowed to settle out

6. Water treatment plant Water pH is adjusted before it enters the biological treatment tank Microbes digest contaminants in the water Air is pumped in to help this process

7. Water treatment plant Water is further filtered to remove any remaining contaminants Large ponds contain clean water ready to be used around the site