My work day starts at 4 am or 4 pm since it’s shift work (rotates days and nights). I go in and make relief with the previous shift to see what has been done for the day. We check the maintenance schedule to see if any equipment (mostly pumps) needs to be ready for work to be done. I make rounds on equipment in the process unit and catch samples for lab results to make sure our product is on spec for customers. We’re paid for our troubleshooting skills to keep the plant making money 24/7.