Training Carbon Dioxide tank overpressure Recently, a HAZMATNATION reader submitted an interesting CO2 call with us that we would like to share. Thank you Mr. Lopez. Aright everyone I made a CO2 alarm last night and would like some insight. This was the first call I’ve ever made on a co2. We were dispatched for a CO2 alarm at a […] Written by Ryan Henry November 9, 2018November 9, 2018