Quality assurance is built into every install
A liner installation needs a record of what was installed and how it was tested. ECA documents panels, seams, and field testing so the owner and engineer can review the work against the project requirements.
Verified in the field, before handoff
ECA's May 2025 qualifications package and company introductory letter describe the field practices below. The project specification and approved QA/QC plan set the requirements for each installation. The welding is done by ECA's own crews; see who provides our geomembrane welding and installation crews and the states they serve.
On-site quality oversight
ECA's quality program assigns a dedicated on-site Quality Control Technician to monitor installation and testing against the approved QA/QC plan.
Seam testing to specification
Destructive and nondestructive weld testing follow the approved project requirements. The documented methods include air pressure, vacuum, and spark testing, selected for the material and seam detail.
Panel and seam traceability
Numbered panels and seams connect the installed liner to panel layout maps, test results, and field logs. These records let the owner and engineer trace the work at handoff.
Inspection coordination
ECA coordinates field quality control with the project inspection team. Acceptance criteria, witness points, and closeout records belong in the approved project QA/QC plan.
Five sample quality control forms
ECA's HDPE / LLDPE Installation Manual, Rev 1/2019, includes these five blank forms in Appendix A. They show how the manual connects panel placement, welding, testing, and repairs through numbered field records.
These are historical source examples. Use the project-approved forms and acceptance criteria for an active installation. The manual complements the applicable project specifications; the sample forms do not establish current project requirements.
Download the five original forms (7-page PDF)Includes the revision cover, Appendix A heading, and original manual pages 13 to 17. The form fields are described below because the source PDF contains images of the blank forms.
- Seam Control FormManual page 13
- Seam number and length; weld date and time; operator and machine identification; machine speed and temperature; preheat and ambient temperature; test date and type; pressure readings, elapsed time, pressure loss, and test results.
- Preweld Test ReportManual page 14
- Weld date and time; operator and machine identification; machine speed and temperature; preheat and ambient temperature; peel results for extrusion and wedge welds; shear results; minimum test values and test results.
- Destructive Sample InformationManual page 15
- Destructive sample and seam numbers; weld date; operator and machine identification; machine speed and temperature; preheat and ambient temperature; peel and shear results, minimum test values, and test result.
- Repair ReportManual page 16
- Repair number and damage code; seam and panel numbers; repair location, type, and size; date welded; operator and machine identification; test type and results; date repair completed.
- Panel Placement LogManual page 17
- Panel and roll stock numbers; deployment date; initial and final panel dimensions; anchor trench length and area; panel area and total area. The header also records roll stock width and anchor trench dimensions.
Source: EC Applications, HDPE / LLDPE Installation Manual, Rev 1/2019, Appendix A, “Sample Quality Control Forms.” Source pages checked September 23, 2026.
Documented safety record, 2022 to 2024
ECA reported zero fatalities, zero lost-work-day incidents, and zero lost work days across roughly 596,000 hours worked in 2022 through 2024. These are historical figures from the safety prequalification form completed by Ric Lopez on May 6, 2025.
| Year | Hours worked | OSHA recordables | Lost work days |
|---|---|---|---|
| 2022 | 221,276 | 0 | 0 |
| 2023 | 234,596 | 2 | 0 |
| 2024 | 140,153 | 1 | 0 |
The package includes ECA's Health and Safety & Injury and Illness Prevention Program, with sections covering site safety, hazard communication, lockout/tagout, fall protection, confined space entry, personal protective equipment, and hot work.
Define the quality records before mobilization
Ask for panel layout maps, numbered seam records, test results, and field logs in the project closeout scope. Confirm the test methods, acceptance criteria, inspection hold points, and document format with the engineer before installation starts.
Source documents: ECA's 253122 SRP Qualifications Statements, May 6, 2025, safety prequalification form and QA/QC program; ECA Introductory Letter. Source records checked September 16, 2026. Current project qualifications can be requested with your bid package.
Request project qualifications and QA documentationPreparing a bid package? Use the installer selection guide to define scope boundaries, material-specific procedures, and the closeout records each bidder should include.
Containment you can stand behind
Tell us about your site and we will walk through how we weld, test, and document the install so it meets your specification.