Gem Bids For Custom Bid For Services - Site Visit, Physical Inspection Of Existing Tanks In-service/out-of- Service Condition, Inspection Of Sand Pad Foundation, Measurement Of Tank Differential Settlement & Tilt, Generation Of Necessary Data Of As-built Tanks, O.. , Custom Bid For Services - Complete Design & Static Calculation Of Cone Roof Tank In Accordance With Api 650, In General & Api 650 Annex F In Particular, Under Changed Parameters Of, 1 Change In Product 2 Pv Valve Settings Thickness Calculation For Sh.. , Custom Bid For Services - Checking And Verification Of Adequacy Of Existing Roof Structure , Custom Bid For Services - Submission Of Dismantling & Conversion Procedure Including Providing Anchor Blocks In Sand Pad Foundation Preparation Of Budgetary Cost Estimate Be For Repair Modification, Alterations Of Existing Tank And Sand Pad Foundatio..