General Guide for Container Cleaning, 2nd Edition This Guide uses color photographs to illustrate different types of container conditions in dry van, open top and refrigerated containers that may or may not require cleaning. For each condition, the Guide recommends the action to be taken, if any, and the cleaning procedure to use, if the container requires cleaning. Areas covered include general principles for determining when to clean, possible harmful contamination and recommended action, and recommended cleaning methods for all types of conditions.