bids are invited for custom bid for services - amc for cathodic protection system of ibfpl quote for sor line item 10 monthly tr unit maintenance and monitoring to be done 1 pipeline and 1 vessel monthly potential monitoring of pipeline 5 point 2 km potential monitori.. , custom bid for services - sor line item 20 quarterly onoff potential survey of pipeline for pipeline lenght of 5 point 2 km onoff potential survey to be done in close coordination with pipeline cp system maintenance group for bangladesh side , custom bid for services - sor line item 30 quarterly ajb cjb deep well anode bed monitoring and maintenance 1 set each for pipeline 5 point 2 km and one vessel , custom bid for services - sor line item 40 annual checking of ht line protection system ctsu polarization coupon monitoring 1 set for pipeline 5 point 2 km on indian side , custom bid for services - sor line item 50 site visit level2 nace certified cp engineer 1 day annually total quantity :