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Ensure that the manifold drainage trough is empty before disconnecting hoses. While cargo measurements and calculations are being completed, the hoses/arms should be drained down and disconnected. Hoses/arms must be blanked off before being removed from the manifold containment area. Any cargo tank valves left open for draining hoses must be closed. Close all pipeline vents.
Oil clean up materials must be ready at hand at the manifold area before hoses are disconnected and any cargo which spills or drips onto the deck must be promptly covered or mopped up to avoid a hazardous condition or pollution.
As soon as the hoses are clear of the manifold, blank off the ship's manifold connections, secure all tools, pump out the manifold containment trough and cover the containment trough with a tarpaulin well lashed down.

3.30.1 Disposal of hose drainings
Cargo which drains into the manifold slop trough can be disposed of by pumping into a slop tank or into a suitable cargo tank, either a crude tank or a cargo fuel oil tank. The transfer must be by way of a regular filling line, never 'over the top' or allowed to free-fall into the tank.
On a product carrier, the manifold trough should be drained or transferred to the shore slop reception system. The shore terminal should not object to this, since any significant amounts of cargo which drain from the hoses while disconnecting are due to poor terminal draining practices or facilities. The transfer should be via a hose with a threaded or bolted flange connection at each end. If the hose is equipped with quick connect end fittings, the connection release handles must be wired shut.
If the trough is drained into an open dock catchment, ensure that the hose end is securely tied to prevent it from moving when the ship's valve is opened. If the transfer is to a ship cargo tank, the chief officer must verify the connection, the alignment of the valves and the content of the cargo tank before the transfer is started.
Disconnecting hoses in the rain presents the added problem of water disposal, however the water volumes are not large, so they should be pumped to the same tank as the cargo hose drainings.

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