You are a health and safety manager working on a superfund site in the middle of a very hot summer. the site has a variety of old rusted 55-gallon drums. the site is a former chemical manufacturing plant. the plant manufactured chlorinated volatile organic compounds including tetra-chloroethylene, trichloroethylene, vinyl chloride and carbon tetrachloride. you have been tasked with preparing a site-specific health and safety plan for your company. the tasks include collecting samples from the drums.