You should report any spill you find as soon as you discover it, even if you don't know when it occurred. The State of Indiana and the federal government have developed reporting limits based on the type of material, its content, the amount spilled or released, and the harm it can cause to humans and the environment. For example, chlorinated solvent can be very persistent when released into the environment. It can spread for miles and take years to clean up. To stop the impact that contaminants like this can cause, it is a requirement to call IDEM's toll-free 24-Hour Emergency Spill Line (888-233-7745) when you discover any spill.