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Survey Documentation 

Open Measurement

Closed / Restricted Measurement

Data Collection

Special Considerations

Precautionary Notes

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Survey Documentation - During Loading

- Communications

Responsible vessel, shore or measurement personnel who notice a problem during any stage of the transfer that could affect subsequent events should promptly notify all key personnel so that timely action can be taken.  Record these events in the inspection report.

When more than one product and/or grade of product is to be loaded, close communication must be maintained between personnel on shore and on the vessel in order to avoid contamination and off-specification material.  This is of special importance when switching from one product and/or grade to another.

During lightering operations, a reliable means of communication with the shore and between vessels should be arranged.

Page 10


- Line Sample  

A line sample should always be taken whenever petroleum or petroleum products are handled.  The purpose of line sampling, as well as any required testing, will be specified by interested parties.  The results of the line sample analysis should be recorded in the inspection report.

For some products, it is necessary to draw a line sample at the commencement of loading each grade of product.  These samples should be drawn at the ship manifold.  After an appropriate settling time elapses - a time that is determined by the nature of the product - the sample should be examined visually to verify its obvious characteristics, that is, whether the product is water white, bright or clear.  If the visual inspection proves unsatisfactory, the loading should be suspended and an investigation conducted.  In the case of products with no obvious signs to observe, prompt laboratory testing for agreed specifications may be required.  In any case, these samples should be taken and retained.

- Test Trial Portion

The practice of loading one (1) foot trial portions is an accepted procedure in the loading of petroleum products.  The procedure normally involves pumping a small amount of the intended product into the vessel's tank, suspending the loading operation and securing a sample to be tested for agreed specifications.  The purpose of this procedure is to determine whether the loading lines and the vessel's cargo tanks have the ability to load "on specification" product.

If contaminants are found, all parties should be notified that compartment or compartments may have to be off-loaded or transferred to a slop tank and another parcel loaded and retested on "first foot".

- Meter Proving

The meter proving should be monitored as appropriate in accordance with MPMS Chapters 4, 5 and 12.2.  A Meter Prover Report should be completed and attached to the metered quantity certificate.

Sections of text taken from API - MPMS Chapter 17 Marine Measurement

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