Sample Tap Chamber Construction

Stonbury’s new civil engineering division have recently been awarded a minor civils package by one of their existing reservoir refurbishment framework clients.

The clients aim for this project was to improve the existing sampling arrangements in order to reduce the risk of bacteriological failures. This project is to construct a number of concrete chambers on service reservoir sites that will house new secure sampling cabinets.

To further reduce the risk of failures, the chambers were set to a level corresponding to the minimum operational level inside the reservoir to be able to run the sample points from gravity flow and not via a small pump. This meant the chambers would have to be sunk into the ground to correspond to these levels.

The chambers were also to include the installation of new direct drainage connections to remove standing water, new tap ins and copper sample lines along with any associated ducting and site remedial works.

Basic designs submitted at tender stage were accepted by the client and once the contract was awarded, detailed structural design was completed to the framework clients own specification.

Our client supplied their own cabinets for this particular project, although our in house facilities can supply and install these. All other works were carried out by Stonbury’s experienced direct labour force utilising our in house plant and equipment.

Works have commenced on site to include the following:

  • Setting of levels, marking out of chambers, drainage and sample lines
  • Location of existing services through various means including CAT and generator scanning
  • Excavations for the chamber, locating mains and drainage connections
  • Shoring of the excavations
  • Installation of new drainage and sample lines
  • Shuttering to form bases and walls
  • Installation of steel reinforcement to the structures
  • Casting new concrete structures
  • Supply and fitting of new safety hand railing and access staircases to specification

With sites located around their extensive area, clients utilised Stonbury’s Client Login to view the progress of each job, updated in real-time by our site supervisors. Daily updates, progress photos and videos were uploaded to our secure website for client access via a web enabled device, which is then converted into a full report upon completion.