IAGI Installer Member
Supply & InstallWater & WastewaterNorth West, South Africa

HDPE Pond Lining, Supply & Installation – Mazista Sewer Treatment Plant, South Africa — 4,300 m²

Supply and installation of a lining system at Mazista Sewer Treatment Plant, combining HDPE geomembrane, EPDM detailing, protection geotextile and associated pipework.

ScopeSupply & Install
Area Lined4,300 m²
ResourcesPond-lining installation team
CQA StandardsMaterial-specific project QA/QC requirements
Completed2025

Case Study Brief

Mazista Sewer Treatment Plant required lined treatment ponds and associated interfaces. Geosynthetics Africa supplied and installed the specified geomembrane and protection materials. The material schedule included approximately 4,300 m² of HDPE geomembrane, 1,200 m² of EPDM and 5,400 m² of protection geotextile, with 150 m of DN110 pipework. The different materials supported the project’s pond-lining and detailing requirements. The installation scope brought together surface preparation, protection-layer placement, liner deployment, seams and penetration details. Quality checks and repairs followed the requirements applicable to each material and joint type. The completed works provided the project’s containment lining. Commissioning and ongoing operation depend on the approved design, documented acceptance checks and protection of the installed system.

The Installation Challenge

The treatment plant required HDPE containment, EPDM detailing and associated pipework to be coordinated across the ponds and interfaces. Protection-layer placement and the different joint types needed material-specific quality control.

The prepared surfaces received protection geotextile and the specified lining materials. HDPE seams, EPDM details and DN110 pipe interfaces were completed using the appropriate methods, with inspections and records tied to the project scope.

Installation Sequence

1

Review the pond formation

Inspect supporting surfaces and confirm perimeter and pipe-interface details before material placement.

2

Place protection and containment materials

Deploy the protection geotextile and specified HDPE lining materials, maintaining identification and avoiding damage.

3

Complete EPDM and pipe interfaces

Fit the EPDM details and DN110 pipework connections to the approved arrangement, using joint methods appropriate to each material.

4

Inspect and hand over

Complete the specified seam and interface checks, repair identified defects and assemble the installation and acceptance records.

Field Quality Assurance (QA/QC) Checklist

Quality checks recorded on this installation.

Material identification: verify the HDPE, EPDM, geotextile and pipework against the material schedule.
Surface and protection review: inspect the supporting formation and protection-layer continuity before liner placement.
Joint and interface checks: apply the specified methods to HDPE seams, EPDM details and pipe interfaces rather than one test method for every material.
Acceptance records: document inspections, repairs and relevant retests, and compile the installed-system handover information.

Products Used in Project

Products supplied and installed on this project.

“In-house project comment: The Mazista scope involved several materials rather than a single liner. Coordinating protection geotextile, HDPE, EPDM and pipe interfaces through one installation team kept the containment details connected.
IM
Ivan M
Project Manager · Geosynthetics Africa — internal project team

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