Just as consumers can track a package from a warehouse to their doorstep, California regulators keep tabs on the movement of hazardous waste, even on a short journey.

Now the Department of Toxic Substances Control is considering whether to lift some of those tracking requirements in situations where companies transport hazardous waste within their own properties and along some public roads.

The University of California system and large corporations say this change in what’s called the manifest rule would make hazardous waste disposal processes safer and more efficient. It could benefit car manufacturer Tesla, giant agribusiness in the San Joaquin Valley or industrial chemical manufacturers in the Los Angeles Basin.

But environmental advocates say state regulators have no good reason t

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