Price follows uncertainty
Demucking quotes widen when the contractor must invent the missing facts. Narrow quotes appear when residue, geometry, location and acceptance gates are stated up front. That pattern is consistent across oil, chemical and product fleets.
Primary cost drivers
- Residue family and thickness — fuel-oil mats differ from light sediment
- Tank count and geometry — hoppers and coils multiply hours
- Work location — alongside versus anchorage changes logistics
- Waste pathway — volume, reception distance and paperwork
- Acceptance gates — demuck-only versus demuck-plus-wash-plus-gas-free packages
- Access and timing — concurrent hot work, night limits, port rules
Briefing checklist (copy into your enquiry)
- Vessel name, location and preferred dates
- Last cargo (and next, if known)
- Tanks in scope with any known problem bays
- Approximate sludge height or recent sounding notes
- Coating type / condition if available
- Required end state: demuck only / wash / wall-wash / gas free
- Waste preferences or nominated receivers
How to read a demucking proposal
Look for explicit exclusions (coil damage risk, unreachable geometry, weather abort). A cheap line item that is silent on waste often becomes expensive at the quay. Cross-check the technical path against our demucking hub and waste notes under sludge & waste disposal.
Send the checklist to operations or open demucking services. Clear inputs produce schedules you can defend to charterers and class surveyors alike.
