1. Environmental
a. Meaning exposure to weather, extremes of hot/cold/wet/humid and other atmospheric conditions such as fumes, noxious odors, dust, mist, gases and poor ventilation that could affect the respiratory system, eyes or skin
b. Meaning exposure to other influences such as vibration in which one is exposed to a shaking object or surface, proximity to moving or mechanical parts, electrical shock, high exposed places with the possibility of falling, radiation, explosives, toxic or caustic chemicals, as well as other areas not specifically defined

2. Noise Intensity
a. Very Quiet – such as an isolation booth used for hearing tests or in deep sea diving
b. Quiet – such as a library, art museum or funeral home
c. Moderate – such as a business office, department store; grocery store; or light traffic
d. Loud – such as a manufacturing department; large earth moving equipment or heavy traffic
e. Very Loud – such as a jackhammer; or the testing area during a rocket engine test