3 Parts Per Million (PPM) : The volume of a contaminant contained in one million equal volumes for air and normally used in conjunction with Threshold Limit Value (TLV).
4 Permissible Exposure Limit (PEL) : The concentrations of a toxic substance to which
employees may be exposed over a work shift time weighted average without any ill effects. An OSHA standard. Personal Protective Equipment (PPE) - Protective clothing consisting of gloves, splash suit, boots, self-contained breathing apparatus, hoods, etc., as required.
5 Portable Vapor Detector (PVD) : A portable instrument which detects and indicates PPM level of toxic vapors.
Respirator : A device which is approved by NIOSH and designed to protect the wearer from inhalation of harmful vapors and particulates.
6 Safety Control Area : A controlled surface area centered on a hazardous operation,
launch vehicle, solid rocket motor or explosive component. Its specific dimensions have been predetermined and vary with the system involved. The size of the control area will be determined by the hazard and risk of the operation and will be specified in operating procedures.
7 Self Contained Atmosphere Protective Ensemble (SCAPE):
A device in the form of a hermetically sealed suit with accompanying breathing device(s) used to protect the wearer from being exposed to hazardous chemical vapors.