I'd suggest that you take a look at past reports in your facility. Unfortunately, turn-arounds activities in Petro-Chemical plants or refineries, are often times ill-documented. You may want to try watching videos of equipment as it was inspected in past turnarounds (if these things are available). In many instances, the "inspection" job is learnt by just getting to do it. This will probably be a great learning experience for you, try to be around people who know exactly what they are looking for during the actual inspections. Be aware that your inexperience can result in delays in the completion of the inspection job; however you still need to get it done. Good luck.