Ha’aretz has an article on the Qumran Latrines by Ran Shapira (“The hidden latrines of the Essenes“) that is worth a gander. Here is an excerpt:
Anthropologist Joe Zias, of the Hebrew University Science and Archaeology Department, recently found positive evidence of the Essenes’ adherence to these rituals. Together with Dr. James Tabor, Professor of Religious Studies at the University of North Carolina and parasitologist Stephanie Harter-Lailheugue of the CNRS Laboratory for Anthropology in Marseilles, France, Zias found the latrines that were used by the Essenes in Qumran. The three researchers say that, in addition to shedding a great deal of light on the unique culture of the Essenes in Qumran, the discovery represents an archaeological bonanza: Additional proof that the Essenes wrote the scrolls. Zias explains that when feces are left on the desert floor, exposure to sun and wind quickly annihilates intestinal parasites. But when feces are buried in the earth, intestinal parasites may survive for many months and their eggs may be preserved for as long as 2,000 years, as in the case of Qumran.
The presence of the eggs of intestinal parasites, typically present in human intestines, in a relatively limited area, in the place described in the scrolls and by Josephus, led researchers to conclude that they discovered the bathroom of Qumran’s ancient residents. “Only ascetic members of a sect that paid such close attention to hygiene would bother to walk hundreds of meters beyond their camp to relieve themselves, and invest the necessary energy to dig a pit in which to bury their waste,” Zias concludes.
For what it is worth, I agree with Joe Zias. I find the non-Essene hypotheses that disconnect the scrolls from the community not as plausible as a modified Essene hypothesis. See here and here for other posts on this discovery.