Of any salts in the sample by adding a drops of Silver Nitrate (‘AgNO’_3) if there is precipitation the sample is not clean properly.
For week four of this training another task was arranged for me, dean stark is one of the processes I worked on in fourth week. This process mainly talk about the percentage of oil and water present in the sample and how to extract it (figure 3, appendix 2).
Dean stark is one of the devices used specially to extract oil and water from samples. The solvent that is used for this process is pure toluene that has a boiling point of 110 C ”.

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First the toluene is hated up in certain temperature that cause the water inside the sample to evaporate after that the toluene and water vapour both condense in water cooler and the toluene in its liquid state go back into the sample to dissolve the oil inside the sample and the water in the cooler is distilled, secondly the sample will be free of water after the process is completed.
In the next step, the sample is placed in Soxhlet apparatuses in order to remove any remaining oil, and make the calculation to get the oil and water percentage.
In the last two weeks of internship, I spent my time in training myself in different departments which I have worked in and working with the lab engineers in the department.
Activates and recommendations

During my time at the Weatherford Company as a practical student there were several activities done by the Weatherford laboratory department, I have been noticing and observing every necessity details related to that. Here I will discuss about activities and propose recommendations if necessary.
In addition, all activities were carried out for various purposes in the Department and were held by professionals. To give an example of that QHSSE meetings, lectures, Radiation test of CT scan, and emergency Oil spill task.

5.1 QHSSE Meetings
To begin with, QHSSE stand for Quality, Health, Safety, Security, and Environment excellence meetings which discuss all the safety moments happen in the industry or in employee’s daily life, also is talk about how to keep the environment safe while dealing with waste, and raise the awareness of employees and their understanding in different areas of work.
5.2 Lectures
The operation manager of the department gives lectures in technical and theoretical part in several subjects once a week for all the workers in the laboratory. The lectures contain the idea behind different processes used in the laboratory also to achieve a better understanding of employees in several sections.

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Recommendations
The lectures are presented in white bored without any other materials which could help the person to understand in better way. I have found during the lecture that some workers found difficulties in understanding the main idea of the topic.