Measure cargo quantity using tank gauging, ullage, sounding, and dipping, calculate volumes using calibration tables, API/ASTM standards, and temperature corrections, verify ship, shore, and terminal figures during loading and discharge, and witness and record custody transfer measurements. * Take representative samples of petroleum products and chemicals, ensure sampling follows API, ASTM, ISO, or IP standards, check product specifications (density, temperature, appearance, water content), and identify contamination, commingling, or off-spec cargoes.
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