I would say your the interpretation of the results are quite a leap from the questions you’ve asked. However, they are workable so don’t worry about having to edit anything.
Looking at them, the first question needed to be more general e.g. are there any possible sites of interest to gather samples? If it comes up Yes you run with the idea of the nearby water that you had. If it was No, then you would have to just move on. With the question you’ve asked, it is a bit too specific and there is potential to get stuck asking question after question about minuete details.
For the second question, again I’d be a little more general e.g. does analysis of the sample return any recognisable results? This again gives more opportunity to intepret, but avoids the problem mentioned above.