Teledyne 6712FR and, Installation And Operation Manual, Page: 207 / 244

C-1
6712FR Refrigerated Sampler
Appendix C General Safety Procedures
In field installations of Isco wastewater samplers and associated
equipment, the safety of the personnel involved should be the
foremost consideration. The following sections provide safety pro-
cedures for working in and around manholes and sewers. the
first section offers general safety advice. The second section deals
with the special problem of hazardous gases found in sewers.
WARNING
The 6712FR has not been approved for use in hazardous
locations as defined by the National Electrical Code.
CAUTION
Before any sampler is installed, the proper safety precautions
must be taken. The following discussions of safety procedures
are only general guidelines. Each situation in which you install
a flow meter varies. You must take into account the individual
circumstances you are in. Additional safety considerations,
other than those discussed here, may be required.
C.1 Practical Safety
Precautions
The following procedures are those used by Black & Veatch, a
respected consulting firm, and are published here by permission.
Field personnel must keep safety uppermost in their minds at all
times. When working above ground, rules of common sense and
safety prevail. However, when entering manholes, strict safety
procedures must be observed. Failure to do so could jeopardize
not only your own life, but also the lives of other crew members.
C.1.1 Hazards There are many hazards connected with entering manholes.
Some of the most common hazards are:
Adverse Atmosphere – The manhole may contain flammable
or poisonous gases or the atmosphere may be deficient in oxygen.
orced ventilation may be necessary.
Deteriorated Rungs – Manhole steps may be corroded and not
strong enough to support a man. It may be difficult to inspect the
rungs because of poor lighting.
Traffic – Whenever manholes are located in the traveled way,
barricades and warning devices are essential to direct traffic
away from an open manhole.
Falling Objects – Items placed near the manhole opening may
fall and injure a worker in the manhole.