No holes, tears or weak seams. Original containers old. Labels partially missing or hard to read. Containers old but patched. Metal containers showing signs of rusting.
Containers have holes or tears that allow fertilizer to leak.
Security Fenced or locked area separate from all other activities, or locks on valves. Fenced area separate from most other activities. Open to activities that could damage containers or spill fertilizer. Open access to theft, vandalism and children. 50 to 100 feet from well.