In light of the recent EPA citation at a bulk storage facility for anhydrous ammonia (NH3) I thought it would be fitting to highlight a best practice from the state of Illinois for this type of process. Most states are in the process of updating their state codes for the safe storage and handling of NH3 – IL was just a little bit faster. They have adopted a lot of CGA 2.1, but they have kept some of the old school details in their new requirements, whereas a lot of states are going with more of a “performance” type requirements.