arpadveress 
Typical locations for hazardous substances Gases, liquids, and vapors
• Petroleum refineries, and gasoline storage and dispensing areas
• Dry cleaning plants where vapors from cleaning fluids can be present
• Spray finishing areas
• Aircraft hangars and fuel servicing areas
• Utility gas plants, and operations involving storage and handling of liquefied petroleum gas or natural gas
Dust
• Grain elevators
• Flour and feed mills
• Plants that manufacture, use or store magnesium or aluminum powders
• Producers of plastics, medicines and fireworks
• Producers of starch or candies
• Spice-grinding plants, sugar plants and cocoa plants
• Coal preparation plants and other carbon handling or processing areas
Fibers and filings
• Textile mills, cotton gins
• Cotton seed mills, flax processing plants
• Plants that shape, pulverize or cut wood and create sawdust or flyings
Source: internet
What about your site? Any of above there?
Keep up good work!
Arpad
