TB 49 - Polychlorinated Biphenyls Flashcards
(21 cards)
EPA forbids manufacturing of PCBs since what year?
1979
Comprehensive studies in 1982 requested by EPA indicates that only what effects have occurred from occupational exposure to PCBs?
Dermatological
PCBs were discovered in 1881 but we’re not commercially manufactured until what year?
1929
PCBs are used primarily as what type of oil because of their stability and ability to transfer heat?
Insulating oils
Any oily mist or liquid encountered in natural gas pipeline systems should be presumed to contain what?
PCBs
Electrical transformers contain how many gallons of PCBS?
20 to 600 gallons
Capacitors contain how many gallons of PCBs?
2 to 4 gallons
PCBs from capacitors which have exploded, may be what in color?
Black
Are DOT placards for PCB required under regulation?
No
PCBs get a what classification on the shipping papers?
ORM-E waste (other regulated materials-E)
All water and power capacitors, transformers, regulators and resistors are labeled with a what size yellow and black sign?
2” x 2”
Positive identification of PCBs can be obtained from water and power emergency dispatch through who?
MFC
The warning label will usually be placed on what 2 things that may not be visible due to distance, height, smoke, and flames?
Transformer or appliance
What health effects have occurred in human population exposed to PCBs?
Chloracne
PCBs have a cumulative effect on the body and are retained in what 4 areas of the body?
Fatty tissue, thymus, adrenal gland, and nervous system
For small fires use what 2 extinguishers?
Dry chemical and CO2
If liquid or solid PCBs are splashed into eyes, they shall be irrigated immediately with copious quantities of running water for at least how many minutes?
15 minutes
All exposed apparatus shall be thoroughly washed and rinsed prior to returning to where?
Quarters
What is the flashpoint of PCB’s
383°
What is the boiling point of PCB’s
612°
How many times heavier than water are PCB’s
1.44x
