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- Tank
Measurement
Take closing gauges,
temperatures and water measurements of each tank that is used in the
loading operation. Record the results of the Report of Shore
Quantity.
- Tank Samples
Take representative tank samples as required after
loading. Specify the locations on the tank from which samples
were obtained and the steps that were followed in producing a
representative sample.
- Automatic Sampler
If an automatic sampler was used, ascertain that
the correct sample volume was obtained. Witness the mixing of
the contents of the sample receptacle and the withdrawal and testing of
the sample. Report any difficulties that occur with relation
to the in-line sampling procedures.
- Meters
Record the closing meter readings and the meter
factor used. Obtain a completed copy of all meter proving
forms and meter tickets. Attach them to the completed Metered
Quantity Report and include them in the inspection report. If
the meter or meters were not proved during loading, indicate the
frequency of meter proving and attach a copy of all current meter
proving reports. The load port form should be similar to the
standard meter proving form in MPMS Chapter 12.2
If manual and/or automatic shore tank measurements
were taken, show a comparison between them and the metered volumes.
Survey
Documentation - Load Port Reconciliation
- Shore and Vessel Transferred
Volume Calculations
Determine the total observed volume (TOV) for
manually gauged and sampled volumes. Deduct any measured free
water (FW) in order to obtain gross observed volume (GOV).
Multiply the GOV by the volume correction factor (VCF) to calculate the
gross standard volume (GSV).
In the case of metered volumes not corrected for
temperature and all volumes sampled by automatic in-line samplers,
multiply TOV by volume correction factor to obtain GSV.
Adjust the GSV for sediment and water
(S&W), if any, either by subtracting the actual S&W
volume or by multiplying this volume by the S&W factor of 1 -
(%S&W / 100) to obtain the net standard volume (NSV).
- Dynamic Measurement With
Automatic Sampler
The indicated volume is corrected by the composite
correction factor to yield a total calculated volume (TCV).
The S&W is subsequently applied to obtain the NSV.
- Indicated Volume x Comp. Correction Factor = TCV
- TCV x (%S&W / 100) = S&W
- TCV - S&W = NSV
- Dynamic Measurement Without
Automatic Sampler
The free water is subtracted from the TCV to obtain
the GSV. The S&W is then applied to the GSV to obtain
the NSV. The values of free water and S&W should be
determined from a consistent, mutually agreed upon source.
- Indicated Volume x Comp. Correction Factor = TCV
- TCV - FW = GSV
- GSV x (%S&W / 100) = S&W
- GSV - S&W = NSV
Sections of text taken from API - MPMS Chapter 17 Marine Measurement
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