Of 31 people nabbed in drug and alcohol tests at Stockton opencast mine in June, four tested positive for methamphetamine (P), Solid Energy has revealed.
The company conducted blanket testing of 880 employees and contractors at the West Coast mine during the week of June 20.
Four tested positive for P, 15 for cannabis - including a supervisor - and 12 for synthetic cannabis/herbal highs, Solid Energy revealed in response to an Official Information Act (OIA) request from the Westport News.
None tested positive for alcohol.
The company had initially refused to reveal the drugs detected or say whether any supervisors or managers had been caught.