According to RCRA §6922, what must waste generators do regarding their shipping manifests?

The requirement to certify efforts to reduce waste volume and toxicity is rooted in the Resource Conservation and Recovery Act (RCRA) regulations, specifically in the context of hazardous waste management. Waste generators are mandated to minimize the volume and toxicity of the waste they produce before it is shipped off-site for treatment, storage, or disposal. This certification serves to underscore the generator's responsibility in waste management and environmental stewardship, ensuring that they not only handle waste appropriately but also take proactive steps to decrease the hazardous nature of their waste.

The other choices touch on various aspects of waste management but do not align specifically with the obligations outlined in RCRA §6922 regarding shipping manifests. Emergency contact information, while important for safety and communication, is not a requisite certification of the waste's reduction efforts. Detailed chemical composition, although essential for identifying the waste type, does not inherently reflect the generator’s commitment to minimizing its environmental impact. Lastly, environmental impact assessments, while critical in broader environmental planning and regulation, are not specifically mandated as part of the shipping manifest certification process under RCRA §6922.