• About us
  • Product
  • Documentation
  • News

  • Type: Retention basin
  • Location: Chevron Willbridge, Portland, USA
  • Area: 4,800 m²
  • Product: COLETANCHE® ES2

In the United States, the federal government regulates secondary containment systems for aboveground storage tanks (ASTs) at terminals and refineries through the Clean Water Act. This law recommends that the dikes and embankments surrounding the facility be “sufficiently impermeable”.

Chevron Willbridge’s constraints are:

  • Sandy gravel soils on site.
  • No existing slope or rainwater collection system.
  • Existing pipes, numerous penetrations, blocks and footings.
  • Limited working space.
  • Irregular stop-and-go planning for waterproofing installation.
  • Construction during the wet, windy and cold season.
  • Work on already sealed areas.

Liquid waste containment:

More information about Learn more about liquid waste containment:

Liquid waste

Chevron planned to replace two old riveted reservoirs with two new large reservoirs that complied with the city’s requirements by installing an “impermeable floor” over the gravelly soil. Waterproofing products were compared in order to select the best solution in terms of construction, operation, maintenance, financial performance and compliance with regulatory criteria.

The client chose COLETANCHE® geomembrane for this project because of:

  • Its high puncture resistance.
  • Its UV resistance.
  • The ease of installing around and under obstacles.
  • No specialist contractor required for installation.

COLETANCHE® can be installed in wet, windy conditions and cold temperatures of -40°C.

The ability to use vehicles normally used for site maintenance (pick-up trucks and small loaders).

bloc info
World implantations
bloc info
References in more than 70 countries
bloc info
30 Million m² laid worldwide
bloc info
5 labels and certifications

We collect and/or access information stored on a terminal, such as cookies, and process personal data, such as unique identifiers and standard information sent by each terminal to measure content performance, obtain audience data, and develop and improve our products.
With your permission, we may use precise geolocation and identification data through those terminal analysis.
By clicking, you can consent to the processing described above.
You may also refuse to give your consent.
Please note that some processing of your personal data may not require your consent, but you have the right to object. Your preferences will only apply to this website.

I agree to the collect and processing of data to measure content performance and obtain audience data

I agree I refuse