How long does marijuana stay in your system of you smoked it once? Someone who smokes occasionally-or for the first time-will  likely test positive for 1-3 days afterward, according to a review  by the  National Drug Court Institute (â¦ NDCI).ow long does marijuana stay in your system of you smoked it once? Someone who smokes occasionally-or for the first time-will  likely test positive for 1-3 days afterward, according to a review  by the  National Drug Court Institute (â¦ NDCI).
Chemical hazard. A chemical hazard is a type of occupational hazard caused by exposure to chemicals in the workplace. Exposure to chemicals in the workplace can cause acute or long-term detrimental health effects.
Hazard Class means the nature of the physical or health hazards, e.g. flammable solid, carcinogen, oral acute. toxicity. Hazardous Chemical means any chemical which is classified as a physical hazard or a health hazard, a simple. asphyxiant, combustible dust, pyrophoric gas or hazard not otherwise classified. Health Hazard means a chemical which is classified as posing one of the following hazardous effects: acute toxicity. (any route of exposure); skin corrosion or irritation; serious eye damage or eye irritation; respiratory or skin.