117
Processing
Step
Potential
Hazards
Significant
Risk?
Basis for Risk
Characterization
Hazard Controls
Applied or Could
Be Applied
Critical
Control
Point?
1. Receiving
Microbial
–
waterborne
pathogenic bacteria,
fungi, viruses and
protozoa
Chemical
–
Potentially toxic
substances such as
disinfection by-
products, organics
and toxic inorganic
compounds
Physical -
none
No
Purchasing high
quality surface
water from the
municipality treated
to National Primary
Drinking Water
Standards in
compliance with
federal law.
None
NO
2. Storage in
Underground
Tank
Microbial
–
potentially
pathogenic bacteria
associated with
biofilms on surfaces
and deposits in the
tank may
Chemical
–
none
Physical
- none
Yes
Water is stored for
up to several days
during which
disinfect can
become depleted.
Intrusion of
microorganisms
from deposits in the
tank can occur.
Amplification to
dangerous levels
can occur.
None currently
applied. Tank could
be regularly
disinfected.
YES
Next Processing
Step correlating
to PFD
The purpose of this systematic hazard analysis summary is to decide
what additional hazard control is necessary, if any, and where to apply it
in the building water system. The team decisions about what and where
hazard control is to be applied is the output of hazard analysis.
Warning:The HACCP teammust not “jump ahead” and start applying hazard
controlbeforefirstgoingthroughthishazardanalysissummaryprocess.Manyfacility
managers have been “sold” hazard control that wasn’t even needed and applied in
ways that actually made the overall building water system more hazardous. This is
unacceptable. It canbepreventedbysystematicallyanalyzingthehazards step-by-step
and thendecidingwhat, if any, additional hazard control is necessary.
Typically, the team uses a table with 6 columns corresponding to 1-6
above as shown in Table 4.
Table 4. Example Hazard Analysis Summary for a PotableWater System
Table 4
