Trinity CUPA Underground Storage Tank Program

Program Overview

Any California business that stores hazardous substances in underground storage tanks must follow the law in California Health and Safety Code, Division 20, Chapter 6.7, and the underground regulations in the California Code of Regulations, Title 23, Division 3, Chapter 16. The purpose of the program is to promote the early detection of release from USTs and reduce the potential for contamination of groundwater. Examples are gas stations and marinas.

Regulatory Authority

40 Code of Federal Regulations, parts 280-281 and 282.50-282.105

Law:  California Health and Safety Code, Division 20, Chapter 6.7
Regulation:  California Code of Regulations, Title 23, Division 3, Chapter 16

What is an Underground Storage Tank?

An underground storage tank (UST) is any one or combination of tanks, including associated piping that is used to contain industrial solvents, petroleum products and other hazardous substances. The tank is totally or substantially (10%) beneath the surface of the ground. The definition of "tank" is a stationary device constructed primarily of non-earthen material (e.g., wood, concrete, steel, plastic) designed to contain an accumulation of hazardous substance. A storage tank system includes the tank, associated piping, monitoring system, and containment equipment.

Plan Review

The program reviews permit applications and issues authorization to construct, upgrade, repair, modify or remove underground storage tank systems. Modification includes the installation or replacement of any leak-detection equipment.

Be certain to include the following items on plans that you submit to the CUPA:

  • Location of all existing and proposed structures

  • Location of all existing underground tanks and piping (indicate if tanks are to be closed or replaced).

  • Location of all proposed tanks and piping.

  • Cross-section of tank and piping system(s). This drawing must show secondary containment of tank(s) and piping, spill/overfill prevention devices, leak detection equipment with the correct number of sensing probes, and extension of all pipes and ancillary equipment to finish grade.

  • Location of underground utility vaults and lines.

  • Site plan showing site address, nearest cross street and property lines (scale and north arrow must be used).

  • One copy of the plans and applications.

Submittal must include:

  • One original and two copies
  • One set of plan drawings
  • Copies of other agency's permits
  • BOE and Assessors parcel number, and,
  • Check for the proper amount (see Imperial CUPA Fees)

Contact Us

DTSC Trinity CUPA Office
8800 Cal Center Drive
Sacramento, CA 95826

Phone: (760) 352-0381
Hotline: (866) 348-0028
Fax: (760) 352-1641