Environmental Monitoring, Acetone - analysis, Humans, Polycyclic Aromatic Hydrocarbons - urine, Inhalation Exposure - analysis, Resins, Plant - chemistry, Industrial Waste, Hydrocarbons - analysis, Occupational Exposure - analysis, Aldehydes - analysis, Polycyclic Aromatic Hydrocarbons - analysis, Air Pollutants, Occupational - analysis, Plant Oils, Skin, Pl...