Homestake Mine of Lead South Dakota - Executive Summary

| Accident History | Chemicals | Emergency Response | Registration | Source | Executive Summary |

The release prevention and emergency response: 
It is this facilities policy to adhere to all state, federal, and local laws. If an emergency were to occur, it is our policy to notify the City of Lead Fire Department. 
Facility and substance description: 
This facility is a surface and underground gold and silver ore mining facility. We use propane fuel for our emergency backup winter heating system. The heating system consists of one 18,000 gallon propane tank and associated piping, valves, burners and other miscellaneous equipment. This tank is kept at 75% capacity. 
Worst case release senario: 
Our worst-case release senario is failure of the 18,000 gallon tank when filled to the maximum capacity(88% at 60 F), resulting in a vapor cloud explosion. 
General release Prevention: 
This site complies with EPA's accident prevention rule and all applicable state and local codes and regulations. 
Five year accident summary: 
In the last five years we have never had an accident involving propane  
that caused deaths, injuries, property or environmental damage, evacuations or shelterings in place. 
Emergency response program: 
In the event of an emergency involving our propane system, it is our policy to notify the City of Lead Fire Department and request that they respond to the emergency. 
Planned changes to improve safety: None
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