How Much is Too Much?
The Permissible Exposure Limit or PEL for H2S
10PPM
This system is depressed when H2S enters the body.
Nervous
At concentrations below 20ppm H2S can cause irritation of ____ & ____.
eyes and skin
H2S smells like this "delicacy" at low concentrations.
Rotten Eggs
_______ signs are critical to preventing an H2S incident.
Warning
The Short Term Exposure Limit or STEL for H2S
15PPM
H2S reduces this element, which belongs to the chalcogen group, when it enters the blood the stream.
Oxygen
H2S concentrations between 20ppm and 100ppm can cause these affects. Name 3
Inflammation, Corneal Blistering, Loss of Sense of Smell, Headache, Cough, Nasuea
Detection of H2S solely by _____ is highly dangerous
smell
Name one of the types of visual notification to inform workers that H2S may be present.
Signage, color coded system, wind sock
IDLH stands for...
Immediately Dangerous to Life and Health
This is the primary entry route for H2S and poses the greatest risk of injury or death.
At this concentration fluid buildup in the lungs will occur.
100ppm
Any surface at this temperature can ignite H2S.
500F
A type of monitor that can be worn and will alert workers to the presence of H2S.
Personal gas, 4-gas, electronic gas detectors
The IDLH for H2S
100ppm
H2S travels through the body via the _____ ______.
blood stream
Respiratory difficulty, depression, and irritation as well as Pulmonary Edema can occur within __ minutes to _ hours after exposure to H2S above 100ppm.
30 / 8
H2S is soluble in both _____ and ______ ____________.
Water and Liquid Hydrocarbons
Never attempt a rescue unless you meet these 2 criteria.
Wearing the appropriate respiratory protection AND properly trained
NIOSH determines that the IDLH of a gas as is when a worker cannot...
self-rescue from a hazardous atmosphere within 30 minutes
Name the 4 ways H2S can enter the body
1. Inhalation, Injection, Absorbtion, and
Ingestion
Name 5 of the 6 things that can occur to a worker exposed to H2S Concentrations above 300ppm.
Tremors, Weakness, Numbness of Extremities, Unconsciousness, Convulsions, Death
When the sense of smell is paralyzed at higher concentrations.
Olfactory Fatigue
These are the only 2 types of respiratory protection allowed to enter areas where H2S concentrations are above 100ppm
SCBA - Self Contained Breathing Apparatus
SAR - Supplied Air Respirators