Misinformation about the ADA and alcoholics is common. Required accommodations may include time off for the employee to undergo rehabilitation or attend Alcoholics Anonymous meetings.
Alcoholism is covered under the ADA.
Remember, OSU has a Drug Free Workplace Policy, which includes the distribution, dispensation, possession or use of alcohol at work and unauthorized use of alcohol by university employees on university premises or in university vehicles on or off campus; and working under the influence of alcohol.
The policy may be found at: https://hr.osu.edu/public/documents/policy/policy730.pdf