EC Applications installs geomembrane liners and floating covers across the United States. Our crews work on lagoons, mining containment, landfills, and water and wastewater infrastructure, with offices in California, Texas, and Nevada.
The installation scope connects the specified geomembrane to the actual site: panel layout, prepared surfaces, seams, penetrations, attachments, testing, and handoff records. For an owner or engineer choosing a contractor, the useful question is whether that team can document the work your design requires.
ECA provides field installation, with fabrication and cover work scoped to the project. Its documented quality program includes panel and seam traceability, field testing, and a dedicated on-site Quality Control Technician. Project specifications and manufacturer requirements set the procedures; the owner and engineer define acceptance and independent construction quality assurance.
View ECA's five sample quality control forms from its HDPE / LLDPE Installation Manual, Rev 1/2019, for the fields used to record seams, tests, repairs, and panel placement.
Use the scope guide and project examples below to prepare your shortlist. The complete service directory follows the guide.
A contractor shortlist is useful when it matches the work. Start with the application, then compare the material, field details, and documents each installer will provide. These are four areas of ECA's documented installation capability.
Lagoon lining, floating covers, cover attachments, and repair work.
Bring to the scope review: Stored liquid, cover duty, operating levels, penetrations, and the available outage window.
ECA's floating-cover capability sheet describes potable-water, odor-control, and biogas applications, including defined-sump, cable-tensioned, and pressure-dome covers.
Heap-leach pads, tailings impoundments, process ponds, solution channels, and mechanical attachments.
Bring to the scope review: Liner cross section, solution chemistry, slopes, drainage layers, and construction sequence.
ECA's mining capability sheet lists single and composite liner systems, geomembranes, GCL, geotextiles, geonets, and drainage geocomposites.
Cell liners, closure systems, and leachate containment.
Bring to the scope review: Permitted design, approved CQA plan, layer sequence, test requirements, and hold points.
ECA's May 2025 qualifications package documents landfill-cell, closure, and leachate-pond installation experience in its QC lead's project background.
Reservoir and canal liners, wastewater lagoons, and floating covers.
Bring to the scope review: Substrate, attachment details, water-contact requirements, access, and shutdown constraints.
The Jefferson Reservoir and Friant-Kern Canal case studies below document ECA's reinforced-polypropylene installation work.
ECA's case study records installation of 160,000 square feet of 45 mil reinforced polypropylene liner in Visalia, completed in 2023. The work formed part of the canal's geosynthetic supply and installation project.
Relevant experience: reinforced geomembrane installation on water-conveyance infrastructure.
View the canal installationECA's case study describes a 45 mil reinforced polypropylene bottom liner inside the City of Wenatchee's concrete reservoir, completed in 2025. The liner was secured to the concrete with a batten bar attachment system.
Relevant experience: reinforced geomembrane lining and mechanical attachment inside an existing concrete structure.
View the reservoir installationSource: EC Applications' two-page rPP case-study document, pages 1 and 2, checked September 23, 2026. The examples describe the liner work only. Ask for references that match your project's material, application, and details.
El Dorado Irrigation District's November 10, 2025 board record reports its October 14, 2025 construction-contract award to EC Applications for the Reservoir 1 Floating Cover Emergency Replacement, project 25040.01. This records an awarded scope; it does not establish completion or performance.
Read EID's board record, consent item 3 (PDF)Use the same scope and qualification questions for every installer. A missing preparation task or an undefined testing allowance can leave bids covering different work.
Discuss your drawings and specificationDownload the bid qualification worksheetManufacturer references: AGRU's HDPE installation guidance addresses installer experience, subgrade preparation, trial welding, and testing. Seaman's XR-5 sample specification covers submittals, fabrication, installer references, prepared surfaces, and seam inspection. Apply the requirements selected for your project.
Thickness is only one part of the specification. Reinforcement, seam configuration, attachment details, and the selected product affect fabrication and field testing.
| Material example | What the source distinguishes | Source |
|---|---|---|
| HDPE | AGRU describes fusion welding, extrusion welding where needed, trial welds, and production seam testing before covering the liner. Repairs are retested. | AGRU installation guidance |
| Reinforced XR-5 | Seaman's sample specification describes heat or RF factory seams, hot-air field seaming, and air-lance or vacuum inspection. An HDPE welding procedure does not establish the XR-5 procedure. | XR-5 specification, sections 1.04, 1.11, and 1.12 |
| Flexible polypropylene | ASTM D6434 guides the selection of test methods for flexible polypropylene. Specify the actual product, reinforcement, seam type, and acceptance criteria for the job. | ASTM D6434-25 scope |
ECA's documented QC program uses numbered panel and seam records, field testing, and on-site QC oversight. The approved plan defines the methods and acceptance criteria for each installation. See the field QA/QC records and responsibilities.
Tell us about the application and our team will scope the right containment approach with you, from materials to installation.