An example would be a nurse tank moved from field to field to supply an applicator rig. A sealed container which holds 275 gallons or less is not considered bulk storage and does not require secondary containment. This applies to multiple mini-bulk containers as long as they remain sealed. Secondary containment is not required as long as the seals remain intact. Any opened mini-bulk container would be considered bulk storage and subject to secondary containment based on the total storage capacities discussed previously.
Special conditions apply to chemigation.
Once a container is connected to a chemigation system, it is considered storage and secondary containment will be required subject to the allowable volumes described previously. When a custom applicator uses pesticides from original containers having a capacity of more than three U.S. gallons. When a custom applicator uses pesticide or fertilizer mixtures in individual quantities greater than 100 U.S. gallons. When bulk liquid fertilizer or pesticide is loaded or unloaded from a rail car. A loadout facility is not required for loadout activities done at the application site as part of the normal application.