Final answer:
Consult the EPA's hazardous waste management program to determine if hazardous waste was spilled or stored on a site.
Step-by-step explanation:
To determine if hazardous waste was spilled or stored on a site, one useful resource to consult would be the Environmental Protection Agency's (EPA) hazardous waste management program. The EPA provides comprehensive information and regulations related to hazardous waste, including recycling, treatment, storage, and disposal. By referring to these resources, you can gain insights into identifying and assessing hazardous waste on a site.