Biocontainment Level-4 laboratories are designed for work with microorganisms that pose serious health threats, making entrance to these facilities highly restricted.

Biocontainment Level-4 laboratories are designed for work with microorganisms such as Ebola, Marburg and Congo-Crimean hemorrhagic fever viruses - contagiums that pose serious health threats, making entrance to these facilities highly restricted.

These labs depend on a reliable source of high purity water for their daily operations: The water used in research at these facilities must be extremely pure. Tap water typically contains particulates, dissolved organics and dissolved inorganics that can impact the results of laboratory testing methods. To remove these contaminants and ensure that the water quality meets American Society for Testing and Materials (ASTM) Type I, 18-MΩ quality, the water must be treated with a combination of technologies.

An ultrapure water treatment system from Siemens Water Technologies, Shrewsbury, Mass., includes a pretreatment cartridge to remove chlorine and particulates; a reverse osmosis (RO) system with a storage reservoir; and an ultrapure laboratory water polishing system.

The system is designed to meet 18.2 MΩ quality ultrapure water with less than 3 ppb total organic carbon (TOC) and less than 0.001 EU/ml endotoxin levels.

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