Throughout the period of storage, the side of each container of hazardous waste shall be clearly labeled and marked in a manner which identifies, in words, the hazardous waste(s) being stored in the container (e.g., acetone, toluene) and the hazard(s) associated with the waste (e.g., ignitable, toxic, dangerous when wet). Each container shall also be marked with the words "Hazardous Waste".
310 CMR, § 30.682