Frogs were seen under the cover of the main underground tank for potable water storage.
One simple corrective action as recommended by auditor is to clean the tank on regular basis and maintain its cleaning records. He also suggest to do microbiological analysis to verify the pathogen load on inhouse water treatment plant.
Problem is that first of all tank is very large in dimension and it seems very difficult to control over frogs. We can place a gauze or net at the main water supply inlet but it may chock due to any incoming contamination or may cause other problems like regular stressful cleaning. Whether there exist any solution or treatment to control frog arrival, growth and survival in potable water tanks?
Edited by Zeeshan, 02 January 2010 - 10:29 AM.