The quality of leak detection technologies employed by Leighton O’Brien for the monitoring and testing of storage tanks and lines has been independently tested and verified by appropriate third party organisations. Our technologies are certified to the common standards required by regulatory bodies.


Ken Wilcox & Associates

This website provides copies of third-party certifications and evaluation reports by leak detection manufacturers that have decided to make them available for download. Copies of listings by the EPA’s National Workgroup on Leak Detection Evaluations (NWGLDE) are also available for all KWA certified methods.

National Work Group

National Work Group

NWGLDE is an independent Work Group comprised of 11 members, 10 of whom represent various states and one from the U.S. EPA.  All our members are state or federal employees whose full time job is to regulate storage tanks for their agency’s regulatory program.  We appreciate these agencies’ willingness to allow our members to participate in the NWGLDE.


Leighton O’Brien is proud to be affiliated with the following organisations:


Petroleum Equipment Institute (USA)

Australian Association of Convenience Stores

Australian Association of Convenience Stores

Australian Convenience and Petroleum Marketers Association

Australian Convenience and Petroleum Marketers Association

Service Station Association

Service Station Association

Leighton O’Brien delivers on every level. They beat the competition on accuracy, they deliver support and innovation that matches our own and they help us make a difference in our sector.

Keith Bevan, Group Business Development Manager
Suresite Group, UK

Adding fuel polishing and restoration to our product line through Leighton O’Brien is another valued service to address fuel quality issues. We are extremely pleased with the design and efficiency of the units and provides a professional platform that fits our model well.

Chris Biellier, Vice President
Seneca Companies – Environmental & Waste Solutions Divisions, USA

Leighton O’Brien is integral to our operation. We trust them to provide tank cleaning, testing and monitoring for our petrol stations around Australia. They are a smart engineering and technology company who I highly recommend.

Terry Lunney, Manager – Assets, Facilities, Construction
7-Eleven Stores Pty. Ltd.

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