15.11.2017

Underground Interceptor Tank Cleaning

FIS has specialist cleaning crews and equipment to enable quick yet effective cleaning of all factory areas and equipment. Our crews are trained and experienced in Water Jetting for surface preparation and cleaning, and Confined Space Entry and Breathing Apparatus for cleaning in inhospitable spaces

In June 2015 FIS were asked for a quote to empty and clean a FP2 CSC class 1 with Econoskim interceptor tanks and visually inspect the tank for any signs of damage that might be in need of repair or defect that may lead to the system working insufficiently.

As this project would involve multiple departments FIS’s dedicated Project Manager took control of the job to make sure the job went smoothly and the departments worked seamlessly together. He carried out a complete site survey prior to quoting this project to fully understand the job and site regulations.

Once the quotation had been submitted and accepted, the Risk Assessments and Methods Statements were produced by our in-house Health and Safety Officer and highly trained Chemist.

FIS were asked to clean and inspect the fuel islands interceptor tanks to ensure there was no damage that could affect the system running properly or any damage to the tank shell that may lead to the tank leaking.

FIS carried out a thorough inspection and the manway covers were found to be in good condition with no cracks, damage or sinking although the operatives noticed that the cover plate was rusted and in need of replacement, this was noted to the Asset & Utilities Manager.

The tanks contained waste water which needed to be emptied and disposed of at a licensed treatment facility before the inspection could begin.

FIS emptied both tanks and it was found that they contained some wall bricks, heavy rubble and some pipework which was also removed.

FIS discovered that the tanks contained heavy sediment and oil on the tanks walls, floors and tank ends which needed to be jet washed before inspection.

FIS professionals jet wash cleaned the interceptor tank with TFR (a powerful degreasing agent) and uplifted using the jet vac tanker. The waste was cross loaded to the tankers and taken back to our in-house waste treatment centre.

FIS strictly followed COSHH assessments. A tripod and winch was positioned over the first manhole cover with an ELSA placed next to the tank. Both man hole covers were removed and a barrier was placed to make operatives aware the space was open but allowing ventilation to the tank. The atmosphere of the tank was measured for 5 minutes to check for any gases.

FIS operatives then carried out a ‘Step Safely’ last minute risk assessment and the team leader completed a confined space permit.

FIS Industrial cleaning operatives used all the appropriate PPE as specified in the method statement then put on the breathing apparatus and turned on their personal gas monitor before being connected to the rescue winch. The top man lowered the cleaning operative who used the tank entry ladder to access the tank.

FIS tank cleaners cleaned the tank using TFR and water then all washings were uplifted to the Flexline tanker. Once full, the washings were transferred onto an ADR tanker to be taken to our inhouse treatment facility.

FIS produced a Gas Free certificate and the cleaning operative took photos of the cleaned tank as requested and inspected the tank to report any defects or concerns to the site engineer.

FIS’s inspection found the tanks to be in good condition with no gauges or signs of damage to the tank shell.

FIS’s Industrial operative completed a full visual inspection report which advised that the tanks should checked on a yearly basis due to the amount of waste build up that was discovered during the tank clean

Overall 421,890 litres of waste sludges and washings were removed from site with appropriate ADR barrels and disposed of at one of FIS’s licensed treatment facilities.

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