Electrical Resistivity Tomography or ERT can be used to analyze the distribution of chemical waste below earth surface. ERT survey was applied in Piyungan Garbage Disposal Center that produces a fair amount of ammonia in liquid form. Elcetrode configuration that was applied was Wenner-Schlumberger within 44 meters long tomography line.
Picture above shows the result of ERT in Piyungan. Based on the picture, ammonia waste can be seen infiltrated below earth surface. Ammonia waste just infiltrated in certain location where dominated with clay or sandy materials.