Public Law 91-596
Answer
The Occupational Safety and Health Act. The General Duty Clause is a part of Public Law 91-
596 that say's "Each employer shall furnish to each of his employees employment and a
place of employment which is free from recognized hazards that are causing or likely to
cause death or serious physical harm to his employees"
Public Law 91-173
Answer
On December 30th, 1969 the Federal Coal Mine Health and Safety Act was passed. Later on
November 9, 1977 it became the Federal Mine Safety and Health Act (MSHA)
Public Law 91-577
Answer
Federal Metal and non-metallic Mine Safety Act
29 CFR 1910.95
Answer
Occupational Noise Standard
Immediately Dangerous to Life and Health (IDLH)
Answer
The IDLH level represents the maximum concentration from which a person could escape
within 30 minutes without experiencing an escape-impairing symptom or any irreversible
adverse health effects. IDLH values are commonly used in determining respiratory protection
requirements
1
, Lethal Dose, 50% Kill (LD50)
Answer
The LD50 is the amount of a material that, when administered to laboratory animals, kills
half of them.
Lethal Concentration, 50% Kill (LC50)
Answer
The LC50 is the concentration of a material that kills 50% of laboratory animals.
Threshold Limit Value (TLV)
Answer
The airborne exposure level under which most people can work day after day without ad-
verse health effect
Thermoluminescent Dosimeters (TLDs),
Answer
The use of TLDs has increased due to the availability and low cost. Solid state materials with
impurities added exhibit high energy levels in orbital electrons when exposed to incident ra-
diation. This allows the material to be heated and a measurement made of light photons re-
leased. The advantages of TLD over film badges include: 1.) available in many forms and
shapes or may be impregnated in other materials, ex. Teflon 2.) TLDs can detect both beta
and gamma as well as slow neutrons. 3.) TLDs have an extended "Shelf Life" 4.) Kiloroentgen
measurements are possible. Alpha detection is not possible with TLDs. TLDS are used for
non-ionizing radiation.
Polychlorinated Biphenyl (PCBs)
Answer
PCBs are found in certain electrical devices such as transformers, capacitors, fluorescent
light ballast, etc, as well as in heat transfer enclosures and investment casting waxes in
2
Answer
The Occupational Safety and Health Act. The General Duty Clause is a part of Public Law 91-
596 that say's "Each employer shall furnish to each of his employees employment and a
place of employment which is free from recognized hazards that are causing or likely to
cause death or serious physical harm to his employees"
Public Law 91-173
Answer
On December 30th, 1969 the Federal Coal Mine Health and Safety Act was passed. Later on
November 9, 1977 it became the Federal Mine Safety and Health Act (MSHA)
Public Law 91-577
Answer
Federal Metal and non-metallic Mine Safety Act
29 CFR 1910.95
Answer
Occupational Noise Standard
Immediately Dangerous to Life and Health (IDLH)
Answer
The IDLH level represents the maximum concentration from which a person could escape
within 30 minutes without experiencing an escape-impairing symptom or any irreversible
adverse health effects. IDLH values are commonly used in determining respiratory protection
requirements
1
, Lethal Dose, 50% Kill (LD50)
Answer
The LD50 is the amount of a material that, when administered to laboratory animals, kills
half of them.
Lethal Concentration, 50% Kill (LC50)
Answer
The LC50 is the concentration of a material that kills 50% of laboratory animals.
Threshold Limit Value (TLV)
Answer
The airborne exposure level under which most people can work day after day without ad-
verse health effect
Thermoluminescent Dosimeters (TLDs),
Answer
The use of TLDs has increased due to the availability and low cost. Solid state materials with
impurities added exhibit high energy levels in orbital electrons when exposed to incident ra-
diation. This allows the material to be heated and a measurement made of light photons re-
leased. The advantages of TLD over film badges include: 1.) available in many forms and
shapes or may be impregnated in other materials, ex. Teflon 2.) TLDs can detect both beta
and gamma as well as slow neutrons. 3.) TLDs have an extended "Shelf Life" 4.) Kiloroentgen
measurements are possible. Alpha detection is not possible with TLDs. TLDS are used for
non-ionizing radiation.
Polychlorinated Biphenyl (PCBs)
Answer
PCBs are found in certain electrical devices such as transformers, capacitors, fluorescent
light ballast, etc, as well as in heat transfer enclosures and investment casting waxes in
2
