“…A single drug abuse violation can re s u lt in the assessment of 100 points. 0 Because the RI policy includes the rig h t to te s t employees for substance abuse under conditions " .. .o f c a u s e ...," RI management believes a number of employees have sought help through the employee medical assistance program (participation in th is program is co n fid en tial). 0 RI management and the local union recently went before independent a rb itra tio n (Drug and Alcohol Policy Grievance No.…”