2.4.2 Fuel Oil Fuel oil is usually sampled using the running or spot sample methods. Fuel oil samples can be taken in glass bottles or metal cans. Many fuel oils also contain high levels of poisonous H 2 S gas. In these situations, it must be handled with the same precautions that are required for sour crude oils. 2.4.3 Gasoline Gasoline samples are usually taken in amber glass bottles. If the samples are to be tested for vapor pressure, care is practiced to ensure the samples are taken in accordance with API MPMS chapter 8.4., Also, refer to section 2.3.7. Sample bottles are to be rinsed in the product To cool the bottle and to remove any residual impurity. Metal cans are permitted in some circumstances. Check with your supervisor. 2.4.4 Tap Samples Tap samples, if taken, should be drawn using an extension that allows the bottle to be filled from the bottom. The tap and line is purged by running a generous into a container used for that purpose. The bottles should be previously rinsed and cooled to a temperature lower than that of the product. The bottle is filled slowly to a maximum of 85% full so as to minimize the formation of air bubbles.
The sample must not be shaken or mixed. Glass bottles are capped with plastic "poly seal" caps to ensure that no product is lost to evaporation. 2.4.5 Water-white Chemicals and Products These are normally as clear as pure water. Many of these same chemicals and products are sensitive to light and are stored in amber bottles or epoxy lined metal cans. When sampling any of these products, the first sample from a tank is taken in a clear glass bottle to visually check for impurities. If the sample is not clear, the appropriate persons must be informed immediately. If the sample passes this first visual test, samples may be taken in amber bottles or transferred to epoxy lined metal cans. 2.5 Sample Labeling All samples must be clearly labeled as soon as possible. Samples should be labelled immediately after the sample is obtained, and always prior to transportation. These sample labels should comply with the Global Harmonized System of Classification and Labelling of Chemicals (GHS), and all local regulations that also apply.
2.3.8 Sample Handling Samples are to be tightly capped to prevent the loss of sample integrity from evaporation or leakage, and carefully transported and stored to maintain the integrity of the sample. 2.4 Commodity Specific Guidelines The following guidelines are to be considered typical rather than absolute, as the type of sample taken on any given movement is a contractual issue. 2.4.1 Crude Oil Crude oil is usually sampled using the running or spot sample methods. Crude oil samples are taken in glass bottles or metal cans. Care is to be taken in handling to avoid the loss of the "light ends". Many crude oils contain high levels of poisonous H 2 S gas, example Maya Crude Oil from Mexico. This often required the use of respiratory protection when sampling.
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