Rehabilitation Services of a Tank. This project is at Qatar. Tenders are invited for Tank Rehabilitation Services in Dukhan Fields. Crude Oil tanks and three (4) nos. of fire water tanks within Dukhan Fields. The scope includes spading of tanks including sludge treatment and disposal, inspection of floor and roof plates and their replacement if required, access ladder, stairway and handrails replacement, refurbishment, painting and coating in line with inspection requirements. Tender documents for the above services can be obtained from the Dates of Issue within the Tender Sale Period. Suppliers and Contractors who are already registered with QP via e-Registration system and are in possession of a valid SAP ID issued by can buy the Tender document online using the Tender Online link in the Tender Issue Period indicated above.