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Gate: Gate 136
Description
Insufficient coagulation and settling process efficiency
Events
Gate 188 - Coagulant composition altered
Basic Event 61 - External person breaks in to WTP and takes over SCADA undetected
Basic Event 62 - Internal person silently takes over SCADA control
Basic Event 63 - Undetected SCADA hijacking software takes control of WTP operation
Basic Event 64 - Man-in-the-Middle attack manipulates WTP control signals
Basic Event 76 - External person physically damages WTP coagulation system
Name
Gate 136
fault tree
STOP-IT Water Quality FT
asset type
Dosing System
event type
Manipulation
operator
or