This is to certify that M/s Electroref Engineers (Pvt) ltd, has carried out None Destructive Testing and welder qualification test for Upper Kothmala hydropower project from April 2009, to September, 2011. During this period they were engaged in radiography work on penstock line which involves 100% radiography longitudinal joints and 20% on circumferential joints of which the thickness ranging from 18 mm to 65mm.