LocationNorth West England

ServicesDecontamination, Tank Cleaning, Ultra-High Pressure (UHP) Jetting, Surface Preparation


The company is a global specialty chemicals company focused on bringing innovative new technologies to market. They serve a range of industries across the world, bringing their products to customers in markets from oilfields, fuels, refineries and power stations to personal care.


At their Ellesmere Port plant Innospec have 7 bulk storage vessels which were used to transport one of their main product lines, tetraethyl lead. TEL, a highly toxic fuel additive, had been shipped around the world to be used in leaded petrol. As their business needs changed and storing large amounts of TEL was no longer needed, the vessels were needed to be used
to hold different materials.

The tanks would need to be tested to ensure their integrity. The internal surfaces would have to be completely free of debris or contaminants so that Non-Destructive Testing (NDT) and if required welding repairs could be carried out on the walls, roof and/or floor sections.


This project had 3 major challenges:

• The vessels had to be cleaned thoroughly to allow NDT and repair. No flammable, hazardous substances could remain.

• Accessing the tank itself to allow for extensive cleaning of the all internal surfaces. This would be done by means of confined space entry by trained and competent operatives.

• The contamination present inside the tank, the tanks were used to store Tetraethyl lead which is highly flammable, toxic and extremely hazardous to health.


• Crest has extensive experience of handling, decontaminating and disposing of contaminated vessels and waste. We could mobilise a trained and flexible UHP Jetting crew utilising our state of the art Jetting equipment to carry out the decontamination procedure.

• Our flexible and extensively trained operatives made numerous confined space entries adhering to the strict confined space regulations to carry out the cleaning operation. Inside the tank a scaffold structure with dance floor had to be erected to ensure the entirety of the internal surface of the vessel could be cleaned and decontaminated.

• All operatives would have to wear specialist PPE and RPE while carrying out the UHP as well as undergoing stringent monitoring of lead levels to ensure their safety and wellbeing. While the jetting operations were taking place, Crest’s 32T liquid ring vacuum truck was working from outside the tank pulling the contaminated waste water into designated waste containers for disposal.


Crest’s UHP jetting expertise, the safety consciousness of our work force, and management team’s attention to detail ensured a dangerous and complex task was completed in the required timescale.

Most importantly to both Crest and the customer the project was safely completed without incident.

The customer could carry out testing and repairs as necessary,
gaining 7 new storage vessels.


Awaiting Testimonial.