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STOP-IT Water Quality FT
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Fault Tree: STOP-IT Water Quality FT
Description
STOP-IT Water Quality Fault Tree based on the Urban Water Cycle
Files
OpenPSA/STOP_IT_Quality_FT_UWC_ONIWcnZ.xml
Events
Gate 120 - Contamination of drinking water
Gate 121 - Contamination at the storage and distribution network
Gate 123 - Contamination at WDN water tank
Gate 181 - Tank quality sensor failure
Gate 124 - Contamination at WDN distribution point
Gate 125 - Contamination at WDN pipe
Gate 126 - Contamination from system open paths
Gate 134 - THM formation in WDN
Gate 146 - Free chlorine residual in WDN
Gate 115 - Additive and/or disinfectant overdosing
Gate 116 - Chemical overdosing due to misled WTP operation
Gate 176 - Staff controlled processes run without WTP data
Gate 177 - Staff or PLC controlled processes run on altered WTP data
Gate 142 - Chemical overdosing due to loss of WTP control
Gate 102 - Water treatment plant failure
Gate 106 - Microbial contamination of WTP outflow
Gate 108 - WTP sanitation process failure
Gate 110 - Insufficient disinfection due to misled WTP operation
Gate 113 - Lower efficiency of WTP disinfectant undetected
Gate 118 - Disinfectant composition altered
Gate 114 - Staff operate disinfection process without WTP data
Gate 117 - Staff or PLC controlled disinfection processes run on altered WTP data
Gate 111 - Insufficient disinfection due to loss of WTP control
Gate 119 - Insufficient disinfection process controlled by intruder
Gate 127 - Inability of WTP to perform disinfection process
Gate 178 - Dosing system disabled
Gate 179 - Dosing system destroyed
Gate 109 - Extreme WTP sanitation process failure
Gate 135 - High level of organic matter in water
Gate 136 - Insufficient coagulation and settling process efficiency
Gate 188 - Coagulant composition altered
Gate 93 - Raw water body contamination
Gate 94 - Groundwater contamination
Gate 96 - Contamination from farming activities
Gate 103 - Contamination at groundwater monitoring site
Gate 182 - Seepage of contaminated floodwater through monitoring wells
Gate 95 - Surface water contamination
Gate 97 - Industrial activities and waste disposal failure
Gate 98 - Failure at sanitation system
Gate 99 - Sewer line failure and flow to surface water body
Gate 85 - WWTP failure
Gate 86 - Overflow due to exceedance of hydraulic capacity
Gate 87 - WWTP site flooded
Gate 88 - Inappropriate hydraulic operation of WWTP due to loss of control
Gate 89 - Inappropriate hydraulic operation of WWTP due to misled operation
Gate 90 - Sub-standard outflow due to operational failure
Gate 91 - Inappropriate WWTP outflow quality due to loss of control
Gate 92 - Inappropriate WWTP outflow quality due to misled operations
Gate 112 - Treated water contamination
Gate 107 - Chemical contamination of WTP outflow
Gate 122 - THM by-product formation in WTP
Gate 143 - External contamination of WTP
Gate 185 - Undetected contamination of WTP chemical solutions
Gate 186 - Quality verification process runs on altered WTP data
Gate 187 - Contamination of WTP chemical solutions
Gate 189 - Additives composition altered
Basic Event 52 - Restricted area authorization procedure failure
Basic Event 53 - Biological, chemical or radioactive substance injected to water tank
Basic Event 150 - No sensor or insufficient type of quality sensor in the tank
Basic Event 151 - External person physicaly manipulates tank quality sensor readings
Basic Event 152 - Man-in-the-Middle attack manipulates quality sensor signals
Basic Event 54 - Biological, chemical or radioactive substance pumped through hydrant
Basic Event 55 - Biological, chemical or radioactive substance pumped through tap
Basic Event 56 - Wrong connection of drinking water pipes with non-potable water pipes
Basic Event 149 - Biological, chemical or radioactive substance injected through pipe
Basic Event 57 - Contamination source present around pipe
Basic Event 148 - PRESSURE DIFFICIENCY CONDITIONS
Basic Event 82 - Organic matter present in consumers drinking water pipes
Basic Event 75 - Chlorination disinfection process in WTP
Basic Event 81 - Additive and/or disinfectant overdose from WTP staff error
Basic Event 42 - External person physically destroys WTP sensors
Basic Event 43 - External person jams WTP sensor signal transmission
Basic Event 46 - Internal person jams WTP sensor signal transmission
Basic Event 47 - Internal person physically destroys WTP sensors
Basic Event 154 - External attacker destroyes absraction point quality sensors
Basic Event 158 - External attacker blocks WDN sensor reading to reach WTP
Basic Event 48 - External person physically manipulates WTP sensor readings
Basic Event 49 - Internal person physically manipulates WTP sensor readings
Basic Event 50 - Man-in-the-Middle attack manipulates WTP sensor signal
Basic Event 51 - Internal cyber manipulation of WTP sensor signal
Basic Event 153 - External attacker manipulates WTP transmission devices
Basic Event 155 - External person physicaly manipulates abstraction point quality sensor readings
Basic Event 156 - Man-in-the-Middle attack manipulates abstraction point quality sensors
Basic Event 157 - Man-in-the-Middle attack manipulates WDN quality sensor readings
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 159 - Incorrect execution or failure of software acquired from an external party crashes WTP control system
Basic Event 160 - Failure to regulate the temperature, humidity and air quality in environments where information systems are located
Basic Event 41 - Disinfectant missdosage from WTP from operational staff error
Basic Event 44 - External person adds substance to WTP disinfectant storage tank
Basic Event 45 - Internal person adds substance to WTP disinfectant storage tank
Basic Event 70 - Natural phenomena alter reagent dosing system
Basic Event 65 - DoS attack to dosing system PLC
Basic Event 66 - No back-up alternative for WTP dosing system PLC
Basic Event 67 - Natural phenomena destroy dosing system
Basic Event 68 - External person physically destroys WTP dosing system
Basic Event 69 - Internal person physically destroys WTP dosing system
Basic Event 76 - External person physically damages WTP coagulation system
Basic Event 77 - External person adds substance to WTP coagulant storage tank
Basic Event 78 - Internal person adds substance to WTP coagulant storage tank
Basic Event 36 - Seepage of Interdependent Industry CI waste to groundwater catchment
Basic Event 33 - Pesticide seepage to groundwater catchment
Basic Event 34 - Nutrient pollution of groundwater catchment
Basic Event 37 - External person injects substance at sub-surface of monitoring site
Basic Event 38 - External person adds substance at the topsoil of monitoring site
Basic Event 39 - External person adds substance through monitoring well
Basic Event 35 - Infiltration of contaminated floodwater to groundwater catchment
Basic Event 14 - Heavy rain
Basic Event 60 - Flood control measures failure near monitoring site
Basic Event 26 - Serious spill from Interdependent Industry CI from cyber-physical attack
Basic Event 27 - Serious spill from inderedependent Industry CI accident
Basic Event 28 - Illegal disposal practices from interdependent Industry CI
Basic Event 30 - Sewer line accidental break
Basic Event 29 - Sewer line overflow from blockage
Basic Event 31 - Combined sewer line overflow from flooding
Basic Event 32 - External person physically damages sewer line
Basic Event 17 - Insufficiency / failure of WWTP flood measures
Basic Event 18 - External person breaks in WWTP and takes over SCADA
Basic Event 19 - Internal person intrudes WWTP control room and takes over SCADA
Basic Event 20 - SCADA hijacking software takes control of WWTP operation
Basic Event 23 - Man-in-the-Middle attack manipulates WWTP control signals
Basic Event 21 - WWTP operational staff faulty actions/decisions
Basic Event 22 - Man-in-the-Middle attack manipulates WWTP data transmitted from sensors
Basic Event 24 - External person physically manipulates WWTP quality sensor
Basic Event 71 - Contaminated floodwater mixed with treated water in WTP
Basic Event 72 - External person induces biological substances to treated water tank
Basic Event 73 - High biological load from improperly maintained WTP storage tank
Basic Event 79 - Contaminated air from Industry reaches WTP and seeps into treated water
Basic Event 80 - External person induces chemical or radioactive substance to treated water tank
Basic Event 161 - External person adds substance to WTP stored additives
Basic Event 162 - Internal person adds substance to WTP stored additives
Name
STOP-IT Water Quality FT