The Environmental Protection Agency (EPA) on Tuesday confirmed that the minor overflow of processing solution that occurred at Newmont's Ahafo Mines was contained within the mines and did not get into waters consumed by the residents of the area... Mr Isaac Osei, Brong-Ahafo Regional Manager of the EPA...said: "There is a computerised level indicator which signals the staff members... - it was at this point that the indicator gave them the wrong signal so they did not realise the overflow in time. This is where I thought they were negligent..." Mr. Osei said the chemical that spilled off was not raw cyanide but a processing solution which contained cyanide.