| http://www.w3.org/ns/prov#value | - Testing of the various fluids in the system (e.g., permeate) may be for the presence of or concentration of any chemical or biological species or for one or more physical or chemical properties (e.g., pH, temperature, viscosity, extent of reaction, specific gravity, chloride ion, antibodies, bacteria, viruses and other microorganisms, e.g., Cryptosporidium oocysts and Giardia cysts, DNA fragments,
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