First, the team made the initial incision into the biodegradable, food grade plastic drums with a drill, and then used the reciprocating saw to cut around the rest of the barrel. These drums will form the basics of our Bio Sand Filter project pre-filters. Once we cut the lids off the plastic drums, they were saved for a future part in the project.
Then we removed the plastic edges, first heating a paint scraper then using it to scrape and smooth the plastic drums. An alternative method would be to heat a knife or another sharp implement, then use it to make the cuts and smoothing of the edges rather than a saw or a paint scraper.
In these drums, which will serve as our pre-filters, we will fill two inches of finer gravel, then two inches of sand. (mc)