Here are some sample photos we captured during a thermographic survey of a landfill site in NZ, in search of methane leaks and thin capping over the fill.
We were contacted by the project managers of the landfill to assist in detecting any signs of methane gas leaking through the surface of the capping over the fill. The compacted dirt capping is there to prevent oxygen being drawn into the fill from the suction of the well pipes. Oxygen can reduce the effect of processing methods when converting the methane into electricity at their onsite plant.
We also used methane detection equipment and a grid system for confirmation if the thermal imaging camera was seeing the methane gas leaks, or the breaches in the capping. (Detector provided by Envco Global).
In the image above, the yellow areas indicate a clear surface temperature difference (anomaly) when compared to surrounding ground temperature.
Due to the nature of the anomaly in this infrared image, it appears there is thin capping in this area over a wider area (When compared with the methane leak in the first image which indicates an isolated area).
In summary, the survey of the site was successful, with over 40 areas marked for further remediation work and thicker capping. The majority of the thermal inspection was done in the dark, starting at 5am in the morning when the air was coolest, therefore allowing the surface temperature where the gas leaks were occurring to stand out in the camera (Maximum Delta-T).
Our methane gas leak detection system using an infrared camera and methane gas detector is a simple and quick method to pinpoint any hot spots on the ground, even in areas where the grass or schrubs are over grown.
Give us a call today to discuss your project, and get a free quote over the phone.