Criminality
Toxic waste
Police dog
Powerline Transformers
large crane
Oil Refinery
ash tray
Watch out
Commercial Development
blaster
Oil Pump Jacks
Refinery Environment
Guided frame
Radioactive Waste
Seamless Hazard Stripes
Seamless Hazard Stripes
Hazard Stripes Frame
Concrete cutting
Construction worker
 drink and drive
Plant chimneys belching out smoke
Construction Layout
cigarettes
environmental hazard
Building under construction