Associated Hazard (outcome) Control Measures. Reduction of water supply

Transcription

1 Raw water Intake Low lift pumphouse Structural failure of intake Source water Inability to pump-all 4 pumps (loss of power, etc.), structural failure, fire Loss of the 2 larger capacity pumps Structural failure of discharge line Vandalism Reduction of water Water Loss of Loss of (partial or total) Contamination, Loss of (partial or total) Monitoring of intake flows, inspections Monitoring activities in the vicinity of (public, media, emergency services, operators), Raw water monitoring (turbidity, colour, micro-organisms, etc.), operator), regular operator), operator), / / / No Page 1 of 6

2 operator), Main Building Lower Chemical Room Coagulant system failure (poly-aluminum chloride) failure of equipment (piping, valves, etc.) Flow meter failure, Flooding,, loss of, loss of control Improper dosing of chemical (PAC) Alarms, inspections,, regular redundancy Daily monitoring, floor drains, overflows,, regular Monitor, calibration, / Rapid Mix Tanks Flocculation Tanks Filters coagulant feed (flash mixer) (valves) Filter break through (piping, valves, turbidimeters, flow meters, backwash, Short circuiting, insufficient, loss of monitoring security, regular / / Yes Page 2 of 6

3 pumps) & control, Clearwell Fluoridation Corrosion Control (lime addition) Operational Errors (back wash, loss of media) Flow meter failures (valves) Structural failure (cracks, leakage, ) (dosage pump, ) (dosage pump, ) insufficient, insufficient Improper dosing of chemical (fluoride, chlorine), insufficient, insufficient Over dose of fluoride Lime overdose, insufficient disinfection Lime under-dose, insufficient chlorine residual training, Monitor, calibration, inspection, day tank (limits the amount of fluoride that can be delivered without Operator control), anti-siphoning valve / / Yes / / Page 3 of 6

4 Disinfection High lift Standpipes Transmission main (loss of chlorinator) underdosing Chlorine leak (major) Inability to pump (valves, pipe, electricals) (insufficient disinfection) Causing additional equipment failure, safety concern, Loss of, reduced alarms (gas detection), Loss of all pumps Loss of Loss of #2,#3 & #4 at the same time Loss of any one of or two of #2,#3 & #4 at the same time (valves, piping, structure) Vandalism Flooding of valve chamber Structural failure (major main break) Partial loss of Partial loss of Loss of storage or Restricted access to valve chamber Loss of or, Inspection, restricted access Yes Mandatory CCP No Valve/header failure could lead to plant shut-down until repaired EMERGENCY / EMERGENCY / Inspection /, public notification No EMERGENCY Page 4 of 6

5 Distribution mains Vandalism/terrorism Accident/act of god/(earthquake, forest fire, storm, vermin, pestilence), civil insurrections Structural failure (major main break),, low pressure, public notification Cross connection By-law, monitoring, regular Low chlorine residual High chlorine residual Valve failure Flushing/swabbing blockages Structural failure, Structural failure, Possible Potential to exceed standard requirements,, low pressure Low chlorine residuals,, Loss of, of Loss of, of Daily monitoring, regular distribution sampling, flushing Consumer complaints, daily monitoring, regular distribution sampling, flushing public notification No Yes.2 mg/l control limit, reportable 0.05 mg/l No Training restricted access Management EMERGENCY No EMERGENCY Page 5 of 6

6 Complete failure Loss of Power including back-up power (includes failure of transfer switch) Loss of Utility Power Analyzer failure(s) Major Fire at WTP (impacting MCC panels, chlorine cylinders, diesel room) Waste water disposal system Labour disruptions Y-Strainer Obstruction Loss of auto-dialer Less convenient monitoring and control Contamination, loss of Contamination, loss of Potential Loss of, Failure of waste water disposal system Loss of, Loss of critical process water No notification to adverse conditions Operational issue (additional staffing) Compliance issues Loss of, Partial Loss of Supply, Contamination Potential Loss, No drinking water health hazard Loss, Loss of chemical feed systems Potential compliance or issues Spare parts, available tech support, regular Management Spare parts, available tech support, regular Management Supernatant back to the lake Management, strike plan Monitoring and scheduled routine Routine scheduled testing of system / EMERGENCY No No EMERGENCY No No EMERGENCY No No Page 6 of 6