In most cases, businesses that treat hazardous waste onsite are required to notify Environmental Health (except those in the City of Oxnard) of the treatment activity and comply with State laws and regulations pertaining to onsite hazardous waste treatment.

Treatment is any process designed to change the physical, chemical or biological characteristic or composition of the hazardous waste. Depending on the treatment process and type and amount of hazardous waste treated, the treatment activity may be allowed under one of three treatment tiers: 1) Permit By Rule; 2) Conditionally Authorized; and 3) Conditionally Exempt (separated into three subcategories). Review the Onsite Tiered Permitting Flowchart to determine appropriate hazardous waste treatment tier for your process. 

The Department of Toxic Substances Control (DTSC) developed the following fact sheets to assist owners and operators of fixed treatment units (FTUs) in complying with applicable laws and regulations:

Helpful Links


Ventura County CUPA Contacts

For specific questions about your permitted facility, please contact your Area Inspector.

Program Specialist                   Supervisor

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805 654 - 2127                          805 654 - 2823

City of Oxnard CUPA Contacts

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805- 385-8364