Shipping of Hazardous Materials Incorrectly Makes our Roadways Unsafe. Most Pool and Spa Chemicals are Classified as Hazardous Materials by the U.S. Department of Transportation. Look for The UPS Approved SAFE Chemicals Shipper Logo to Ensure your Package is Safe and legal. Join us in Keeping our Roads and Streets Safe. Paying a few Dollars less for an ILLEGAL Shipment isn't worth the Risk.