Control measures, monitoring and response – example for microbe hazards
Hazard/
System
hazardous
component
event
Collection
System
Treatment System
Operational Limit
Corrective Action
Notify
Customer
services
Compliance with CoP
Apply response and/or enforcement actions in accordance
with the CoP
ADSSC Plant
Manager
Continuous on
line monitoring
Shift operator
1.5mg/l ±0.5mg/l
Flow rate
through
system
Check flow
meters 4 times
daily
Shift Operator
Flow rate between xx
and xx L/min
Check MLSS, DO and Sludge Age.
Carry out microbiological examination of MLSS
Assess need to change Sludge age and act accordingly
Check turbidity of tertiary treatment feed
Site manager
Final effluent
turbidity
Twice per shift
times daily
Shift operator
Final effluent Turbidity
must be <5NTU
Clean turbidity monitor & check calibration
Check operation of sand filters and correct if necessary
Take composite sample of final effluent and assess BOD & SS
Divert final effluent to head of works for further treatment
Site manager
O&M Manager
& RSB if flow
diversion
Post filter
hypochlorite
dose volume
Daily
Site Operator
Dose volume = Influent
flow rate x ?? ±10%
Site Operator
Residual chlorine must
be
0.5 to 1.0 ± 0.1mg/l
Measures
What
When
Who
Management of canteen
and laundry dischargers
Scheduled
inspections
Annually
Dissolved
Oxygen
Biological treatment of
wastewater
Microbiological Pathogens
Monitoring
Control
Tertiary treatment of
wastewater by sand
filtration
Chlorine disinfection of tertiary Spot check of
final effluent
treated wastewater
residual
chlorine
Disposal
System
User awareness
Information
bulletin to
AAM
Site lab
technician
Monthly
Summary of RW Quality
with ADSSCs views on
Site Manager
use restrictions issued to
AAM
Clean DO monitor & check calibration
Check operation of air blowers & correct if necessary
Site manager
Take composite sample of secondary treatment effluent and
assess BOD & SS
Check dosing pump operation and correct if necessary
Adjust dosing pump output
Check final effluent residual cholrine
Site manager
Clean chlorine monitor & check calibration
Check operation of dosing system and correct if necessary
Check quality of tertiary effluent
Divert recycled water to head of works for further treatment
Alert AAM that residual chlorine out of spec.
Site manager
AA Municipality
O&M Manager
& RSB if flow
diversion
Establish why report not submitted
O&M Regional
Manager