Pleural effusion
A pleural effusion is an accumulation of fluid between the layers of the membrane that lines the lungs and chest cavity.

Acute Exposure
Exposure to a chemical for a duration of 14 days or less, as specified in the Toxicological Profiles.

Excursion Limit (EL)
1 Fiber per cubic centimeter averaged over a 30 minute sampling period.

Malignant pleural mesothelioma
Malignant pleural mesothelioma is a type of cancer that affects the inside lining of the chest cavity. It is usually associated with asbestos exposure.

Stage 1 Mesothelioma
Stage 1 mesothelioma affects one layer of the pleura only. It may have grown into the covering of the heart (pericardium) and the diaphragm

Class IV asbestos work
Means maintenance and custodial activities during which employees contact but do not disturb ACM or PACM and activities to clean up dust, waste and debris resulting from Class I, II, and III activities.

Intermediate Exposure
Exposure to a chemical for a duration of 15-364 days, as specified in the Toxicological Profiles.

Stage 3 Mesothelioma
Stage 3 mesothelioma has spread to the chest wall, food pipe (oesophagus) or lymph nodes on the same side of the chest

Stage 4 Mesothelioma
Stage 4 mesothelioma has spread via the bloodstream to other organs in the body such as the liver, brain or bone or to lymph nodes on the other side of the chest

Serpentine
In the asbestos varieties, the brucite and silicate layers bend into tubers that produce the fibers. Chrysotile asbestos is a fibrous member of the serpentine group. "Serpentine" comes from mottled shades of green on massive varieties, suggestive of snake markings.