conducting dcvg survey in 12 inch dia . barauni-kanpur , 20inch dia barauni-patna , 18inch dia paradip-haldia-barauni and 12inch dia haldia-barauni section in bihar base , for dcvg survey in bihar state , conducting direct current voltage gradient survey over the buried line to identify / pin point the coating defects in the right of way including the cost of all expert manpower , transportation and camping facilities etc . to their employees , materials , test instruments , equipments , consumables etc . , required for the survey as per the standard specifications and approved procedures , identification of areas/ locations where coating repair is required alongwith suggestion for remedial measures etc . complete in all respects as per directions of site engineer / engineer-in-charge . , verification of various defect spots each at different locations by bell hole inspection , as decided by engineer-in-charge . , for dcvg survey in jharkhand state , conducting direct current voltage gradient survey over the buried line to identify / pin point the coating defects in the right of way including the cost of all expert manpower , transportation and camping facilities etc . to their employees , materials , test instruments , equipments , consumables etc . , required for the survey as per the standard specifications and approved procedures , identification of areas/ locations where coating repair is required alongwith suggestion for remedial measures etc . complete in all respects as per directions of site engineer / engineer-in-charge . , verification of various defect spots each at different locations by bell hole inspection , as decided by engineer-in-charge .