California Neutralization of Wastes: What you need to know

Governing Law and Regulations

Transportable Treatment Unit (TTU) and Fixed Treatment Unit (FTU) requirements: 22 California Code of Regulations (CCR) 67450

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Elementary neutralization unit (ENU) definition: 22 CCR 66260.10

Permit exemption: California Health and Safety Code (CH & SC) 25201.5

Regulatory Agency

California Environmental Protection Agency (Cal/EPA) Department of Toxic Substances Control (DTSC)

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. California's requirements for ENUs are more stringent than the federal rules. In California, elementary neutralization units must meet the state's unique TTU or FTU permit-by-rule requirements in order to operate. For California's permit-by-rule requirements for TTUs and FTUs, see the state section TSDF PERMITS.

Administration and enforcement. Cal/EPA's DTSC administers and enforces the hazardous waste neutralization rules in California.

State Requirements


22 CCR 66260.10

ENU. California follows the federal definition of ENU as a device that:

  • Is used for neutralizing wastes which are hazardous wastes only because they exhibit the corrosivity characteristic or are listed as a hazardous waste only for this reason
  • Meets the definition of tank, tank system, container, or transport vehicle or vessel

Treatment. Treatment means any method, technique, or process that changes or is designed to change the physical, chemical, or biological character or composition of any hazardous waste or any material contained therein, or removes or reduces its harmful properties or characteristics for any purpose including, but not limited to, energy ...

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State Requirements

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California Neutralization of Wastes Resources

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Neutralization of Wastes Products

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