Do run tests for substances that might be there, but you're not sure. The waste management facility suggests testing for solvents and heavy metals. Last year the shop eliminated all solvents from their cleaning process. The facility agrees that solvent testing is unnecessary. Since the parts are corroded before cleaning, it's a good idea to test for heavy metals.
All waste needs to be designated.
Waste designation means deciding if the waste is dangerous waste and selecting the applicable dangerous waste numbers. Dangerous waste numbers are standardized codes that explain why the waste is hazardous. Sometimes, you might find out that a waste is undesignated , which means it's not dangerous waste. A waste profile is a written description of chemical ingredients and dangerous waste numbers. It explains how the waste was generated and the transportation and safety guidelines.