FOREWORD Addendum a makes changes to Informative Appendix A. These changes better define specific food items that may produce atmospheres that are corrosive to the evaporator coil in the airstream. It also addresses a more broad view of corrosion protection other than adding coatings. Note: In this addendum@ changes to the current standard are indicated in the text by underlining (for additions) and(for deletions) unless the instructions specifically mention some other means of indicating the changes.