ENGINEERING
Page 28
Omniguard™ 4
Appendix C: Establishing a Containment Site
The
Omniguard 4
monitors and records the differential pressure
between the #1 inlet port and the #2 (Reference) inlet port.
In abatement applications the
Omniguard 4
should be located
outside the containment area and not in any antechambers (i.e.
shower or changing room). This allows a supervisor or hygienist to
monitor pressure readings without entering the containment area.
This section of general guidelines to establishing a containment
site is provided by Engineering Solutions Inc for informational
purposes only. Engineering Solutions Inc is not responsible for its
accuracy nor conformance with specific regulations for your area.
Engineering Solutions Inc specifically advises all users to obtain
the advice of qualified professionals for each use and application
of the
Omniguard 4
. Engineering Solutions Inc makes no claims
as to the proper usage or interpretation of the data provided by the
Omniguard 4
.
General Guidelines to Establishing a Containment Site
1. The contractor and hygienist are to be certified prior to qualifying
to bid on an abatement job.
2. All workers are to have undergone specific training in abatement
procedures.
3. Typical abatement requirements:
a. containment area to be sealed within a double layer of
8 mil plastic or equivalent.
b. before beginning work within the containment area and at
the beginning of each shift, the containment area must be
inspected for breaches and smoke-tested for leaks, and
any leaks sealed.
c. air volume within containment must be changes 4 times
per hour, i.e. the entire air volume must be evacuated
every 15 minutes.
d. minimum pressure in containment is -0.020”WC, i.e. the
differential pressure between containment pressure and
ambient/outside pressure must be at least -0.020”WC as
measured by a manometer.
e. the containment area must be kept under negative pressure
throughout the period of its use.
f. air movement must be directed away from employees
within containment and toward a HEPA filtration unit.
g. fiber levels within the containment area must be sampled
at a specific interval and be less than a proscribed level,
i.e. sampled 1 time a day or more and fiber levels below
“5 fibers/100 fields”.
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