A typical brewery their size that does not use renewable energy emits around 250g CO2e per 6 pack. A larger brewery would have higher emissions caused by powering a bigger building.
Our back of the envelope calculations indicate that a 10-bbl batch of average strength beer produces about 48 kg (848 cubic feet) of CO2. This is easily enough CO2 to cause a workplace hazard if you don't have good ventilation.