Managing Hazardous Waste

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30-Day Storage Extension Application for Hazardous Waste Generators

The Department of Toxic Substances Control (DTSC) may grant an extension, of up to 30-days, to a generator of Resource Conservation and Recovery Act (RCRA) waste who cannot meet the 90-day or 180-day on-site hazardous waste accumulation limit requirements. Pursuant to California Code of Regulations, title 22, section 66262.34(c), “An extension may be granted by the Department if RCRA hazardous wastes must remain onsite for longer than 90 days due to unforeseeable, temporary, and uncontrollable circumstances.”

DTSC grants discretionary extensions of up to 30 days for RCRA waste on a case-by case basis. Please contact the Certified Unified Program Agency (CUPA) in your jurisdiction for non-RCRA waste. For non-RCRA and RCRA exempt wastes, one-90-day extension is automatically granted if all of the conditions in title 22, California Code of Regulations, section 66262.35(a)(1) are met.

To process your request in a timely manner:

  1. The completed application can either be submitted by hard copy or electronically. Submitting the application electronically will expedite the review process.
  2. The application must include detailed information regarding the circumstances necessitating the request.
  3. The application must be received by DTSC prior to the expiration of the 90-day accumulation time limit.

If the request is approved, an extension of up to 30-days will be granted. The hazardous wastes must be removed from the facility within the approved extension time. DTSC will provide an explanation for any application denial. Denials will be issued to applicants whose submittals are for wastes remaining onsite after the 90-day storage limit has expired or for incomplete applications.

A legible photocopy of the manifest showing that the waste was removed within the allotted time must be submitted to DTSC at the address listed below or submitted by email within 10 days after the expiration of the storage extension. The application number found on the first page of the processed and returned application in the box marked “FOR OFFICE USE ONLY” must be printed on the top center of the copy of the manifest.

  • 30-day Storage Extension Application
    To sign and submit the form electronically, the PDF file must first be saved to your computer. Hover your mouse over the link above and right-click. Select “Save link as” (Chrome & Firefox)  or “Save target as” (Internet Explorer). The file will save to the folder where you have specified your downloads to save to.

If you have any questions, please contact:



Department of Toxic Substances Control
Enforcement and Emergency Response Division
700 Heinz Avenue
Berkeley, California 94710-2721
Attention: Storage Extension Requests