Experimental evidence and practical experience:

A review of reports of experimental evidence and practical experience within the petroleum organization displays in which no important increase within fire safety is gained through the use of spark-resistant hand tools in the presence of gasoline and similar hydrocarbon vapors.  Therefore, a few materials like as carbon disulfide, acetylene, and ethyl ether have extreme low ignition energy needs. For these and same materials, a use of special tools designed to minimize the danger of sparks  within  hazardous  locations  could  be  recognized  as  a  conservative  safety  measure. Plastic, Leather-faced, and wood tools are free from the friction-spark hazard, while metallic particles might probably become embedded within them.

Flammable and combustible liquids and their vapors might create health hazards from both skin contact and inhalation of toxic vapors. Irritation output from the solvent action of several flammable liquids on the natural skin tissue and oils.  A toxic hazard of varying degree exists in practically all cases that is depending on the concentration of the vapor.

Many vapors from combustible and flammable liquids are heavier than air and will flow within pits, confined areas, tank openings, and low places in that they contaminate the normal air, or cause a toxic as well as explosive atmosphere. Oxygen deficiency occurs in closed containers, like as a tank that has been closed for a long time and in that rusting has consumed the oxygen. Whole containers should be aired and tested for toxic and flammable atmosphere as well as the oxygen level before log in.