In the Light Filtration Tank X-10, the first treatment is a sand trap, where through gravity, a separation of all those compounds which have a specific weight, different to water, will sink. These include sand, mud, gravel. They will sink and accumulate at the bottom of the tank, whilst the lighter materials (oils, etc) float to the top. The outlet pipe sucks the water from the middle point of the separator tank, preventing any overflow of the separated pollutants at the top and the bottom of the tank

The second filtration step is to remove oil and hydrocarbons. This is done due to the gravity separation and later with an absorption filter, able to intercept the oil and hydrocarbons from the water. After this, the recycled water is pumped into the final separator tank and is considered clean and ready to be used again to wash down other equipment.