Your town is not close to anything, so I'm guessing you need to stock up to finish the job, BEFORE you start.

Trying to clean up a 20x40 swamp with 6% bleach is going to take a LOT of jugs of bleach. Can you get your hands on a 100lb drum of calcium hypochlorite? That might be the easiest solution.

But:
  • DO complete the chart;
  • DO get a K-2006 *and* an OTO test kit (see test kit info page in my sig)
  • DO list what you have on hand, and what form of chlorine is most available to you