Contaminant

Sources from the Auto-mobile workshops

Engine oil

Waste engine oils drained from vehicles or used for lubrication of body parts

Grease

Lubricants

Gear oil

Waste gear lubricant oils

Carbide

Wielding

Lead

Petrol, body parts, acid waste from battery, used copper wire

Cadmium

Batteries, painting, petrol

Chromium

Panel beating, car body scrapping and painting

Copper

Copper wires, electronic components of the vehicles and batteries