About 50 to 100 grams of liquid Novichok was used in the March 4 attack on the former Russian spy Sergei V. Skripal and his daughter,
May 5th, 2018‘……….“One thing, perhaps, which is important to note is that the nerve agent seems to be very persistent,” he said. “It’s not affected by weather conditions. That explains, actually, that they were able to identify it after a considerable time lapse. We understand it was also of high purity.”
He said the agent could be applied with an aerosol spray or, “if you take the necessary measures, you could use it as a liquid.”
Health officials have begun a meticulous decontamination process, warning citizens of Salisbury that there might still be toxic “hot spots” in some areas, and that a thorough cleanup may take months.
Though citizens have been reassured that there is little threat to their health, the decontamination promises to be a vast undertaking, requiring backup from 190 army and air force specialists as well as input from the Defense Science and Technology Laboratory, the Home Office and the Ministry of Defense…..’