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CASE STUDY

STP & DRAINAGE FIELD INSTALLATION

10th June 2025

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THE  CIRCUMSTANCES 

SEWAGE TREATMENT PLANT

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The customer had a Sewage Treatment Plant that only served their property

The customer had their tank emptied, which then overflowed the following day

TANK OVERFLOW

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SPLIT TANK

A split was identified in the STP, allowing water to enter the tank, with wastewater also flowing back in

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Our inspection of the outlet revealed holding water, preventing waste from percolating into the ground

FAILED OUTLET

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We concluded that the damage was ground movement or hydrostatic pressure

CAUSE OF DAMAGE

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Works were recommended & carried out in order to resolve the customer’s issue

WORKS REQUIRED

THE  TIMELINE 

1

FIRST CONTACT

On 10/06, a dedicated Claims Technician contacted the customer to introduce themselves, complete an in-depth triage and explain their options. An appointment was booked to attend the property on 20/06 to complete an investigation.

2

INVESTIGATION

Our engineer attended the customer’s property to investigate on 20/06. All site data was submitted by our engineer and reviewed by the customer’s Claim Technician. A report was produced and submitted for authorisation on 24/06.

3

REPAIR

Authorisation to proceed with the case was provided on 24/06. We attended the customer’s property on 03/07 & 21/07 to complete percolation testing ahead of the planned repairs. Recommended repairs were authorised on 20/08. We attended on 15/09 to complete final investigations ahead of the repair works which started on 29/09 and took 3.5 weeks to complete.

4

SATISFACTION

The customer’s dedicated Claim Technician called to confirm they were happy with the works completed. The customer was also issued with their 3-Year TankShield Warranty for our repairs.

     OUR  SOLUTION      

View of a storm drain with water flowing through it, surrounded by gravel, grass, and metal caution covers.

Due to damage to the Sewage Treatment Plant, the customer’s tank was overflowing despite having recently been emptied.

An excavated area with a Sewage Treatment Plant surrounded by soil and gravel, with grass and a sidewalk nearby.

We installed a new 8PE Sewage Treatment Plant with a pumped outlet. This required a short re-route of the upstream drainage.

Construction site showing a trench lined with white geotextile fabric, with gravel on one side and a brown PVC pipe running through the trench, connected with elbow joints. This is the installation of a Drainage Field.

Following successful percolation testing, we installed a Drainage Field as the outlet for the new Sewage Treatment Plant.

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The existing Sewage Treatment Plant was backfilled and decommissioned, and grass surfaces were topsoiled and seeded.

I am very happy with the works, and your engineers on site were excellent.

Customer