FlowTrace Leak Detection

FlowTrace® Test Method – Overview
Enviro Trace Ltd. has developed our unique FlowTrace® test using quantifiable tagging agents (QTA's) with properties that allow us to detect leaks very quickly. We are able to complete our test in a short period of time, usually requiring only one visit to site. The QTA is introduced into the underground tank under a slight positive pressure. Soil vapour samples are taken from riser wells installed around the tank. These samples are then tested in our lab for the presence of the specific QTA. Any detection of the QTA outside of the tank is indicative of a leak.

Quantifiable Tagging Agent
Our QTA's are inert, non-flammable components that are detectable with specialized lab instruments. The QTA is unique and not normally occurring, so detection of it outside of the tank indicates a leak.
FlowTrace animation

Tank Testing
Most underground atmospheric tanks can remain in service during the test. Tank vents may need to be restricted to allow minimal pressure to build. There is no need to clean the tank or to adjust product level in the tank. The test can be completed in a relatively short period of time. Test results can be available the same day. Tank beds that contain more than one tank can easily be tested.

Non-Pressurized Vessels
Non pressurized vessels may need to be isolated to perform the FlowTrace test. Again, there is no need to adjust product level or to clean the tank.

UST – Underground Storage Tank
Underground tanks that cannot be tested by the FlowTrace method can be tested using our traditional quantifiable tagging agents (QTA's). The process is similar; the tank is inoculated with the QTA and, after a number of days, soil vapour samples are taken from the installed riser wells around the tank. These samples are examined in the lab for the presence of the QTA.

The tank can remain in normal operation with no lost revenue. There is no requirement to isolate the tank from the production stream nor to empty or clean it.
The amount of fluid in the tank has no impact on the test, so there is no need to adjust product level.Associated underground lines can easily be included in the test.

AST – Aboveground Storage Tank
An aboveground tank can be integrity- tested using a quantifiable tagging agent (QTA) which is introduced into the fluid in the tank. A minimum amount of product is required in an aboveground tank.  After a number of days, soil vapour samples are taken from riser wells placed around the tank. These samples are then analyzed in our lab, looking for that particular QTA.  The tank can remain in normal operations with no lost revenue. There is no requirement to isolate the tank from the production stream nor to empty or clean it.

Pipelines
Pipelines can be integrity tested using the FlowTrace method or by using our traditional quantifiable tagging agents (QTA's). Which test is best suited will be determined by the specific situation.  The process is very similar in methodology to tank testing.



Legislation
Directive 055 discussion document
Directive 019 compliance assurance
Directive 039 benzene emissions
Directive 055
Directive 060
Directive 066