CUPA Team

The Napa County Division of Environmental Health (DEH) is the Certified Unified Program Agency (CUPA) for all cities and areas of Napa County.

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  1. Unified Programs
  2. Other Programs
  3. Additional Information

Hazardous Waste Generator (California Health and Safety Code Chapter 6.5)

Hazardous waste is subject to storage time limits, container labeling and management, and disposal requirements. There are just over 400 facilities permitted as hazardous waste generators in Napa County. They are inspected triennially. For more information please visit the Department of Toxic Substances Control website for Hazardous Waste Generator information.

Underground Storage Tank (California Health and Safety Code Chapter 6.7 and Napa County Code Chapter 16.20)

All underground storage tanks (USTs) are subject to monitoring forleakage. All USTs are inspected annually by DEH to verify compliance with statelaws, regulations, and permit conditions. All new tank installations,modifications/repairs, and removals/closures are permitted by DEH There are 44 USTfacilities in Napa County. For additional information please visit the State Water Resources Control Board website for USTs.

Aboveground Petroleum Act (APSA)(California Health and Safety Code Chapter 6.67)

APSA regulates facilities with aggregate aboveground petroleum storage capacities of 1,320 gallons or more, which include aboveground storage containers or tanks with petroleum storage capacities of 55 gallons or greater. These facilities typically include large petroleum tank facilities, aboveground fuel tank stations and vehicle repair shops with aboveground petroleum storage tanks. The Act does not regulate non-petroleum products. All regulated facilities must meet the federal SPCC rule requirements.  Please visit The California Office of the State Fire Marshall administers the APSA program website for additional information on APSA.

Hazardous Materials Business Plan (California Health and Safety Code Chapter 6.95)

DHE conducts regulatory oversight (review of plans and inspections) of all businesses including farms, federal agencies, state agencies, and local agencies that handle quantities of hazardous materials/ hazardous waste greater than or equal to 55 gallons of liquid, 500 pounds of solids, and 200 cubic feet of a compressed gas at any time. There are an estimated 1,250 facilities throughout Napa County that are subject to the regulatory requirements of this program that are inspected triennially. Please visit the California Office of Emergency Services website for additional information on Hazardous Materials Business Plans.

California Accidental Release Prevention Program (California Health and Safety Code Chapter 6.95)

There are certain regulated substances, known as extremely hazardous substances, that require extensive emergency planning. The most common regulated extremely hazardous substance found in the county requiring a Risk Management Plan (RMP) is anhydrous ammonia. There are over 400 other chemicals that may require a RMP. Businesses that meet threshold quantities specified by U.S Environmental Protection Agency (US EPA) are subject to both state and federal RMP requirements and shall provide their RMP to both the CUPA and the U.S EPA on the date on which the regulated substance is first present in a process above the federal threshold quantities of the substance. 

Facilities that have regulated substances above the State of California thresholds shall submit a RMP to the CUPA on the date on which a regulated substance is first present in a process above the state threshold quantities Every three years the owner must certify compliance of their processes and practices and every five years the owner must update their RMP and reevaluate that their process hazard analysis remains current. There are 9 facilities throughout Napa County that are subject to the regulatory requirements of this program that are inspected triennially. Please visit the California Office of Emergency Services website for more information on the California Accidental Release Prevention Program.