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Hazardous Materials & Waste (CUPA)
Our office is now located at 146 7th Street, Colusa


The Unified Program is the consolidation of six state environmental programs into one program under the authority of a Certified Unified Program Agency. Colusa County Environmental Health was certified by the California Environmental Protection Agency as the Certified Unified Program Agency (CUPA) for Colusa County. The CUPA inspects businesses or facilities that handle or store hazardous materials; generate hazardous waste; and own or operate underground/above ground storage tanks.

The primary goal of the Colusa County CUPA program is to protect public health and the environment by promoting compliance with applicable laws and regulations.

All inspectors in the CUPA Program are trained Registered Environmental Health Specialists (REHSs) who take part in a continuous education program to ensure consistency and uniformity during inspections.

* Please Note: All Forms listed below are in an Adobe Acrobat PDF format.

Hazardous Materials Busniess Plan Program (HMBP)

Hazardous Materials Business Plans contain basic information on the location, type, quantity, and health risks of hazardous materials stored, used, or disposed of in the state. Chapter 6.95 of the Health and Safety Code establishes minimum statewide standards for Hazardous Materials Business Plans (HMBPs). Each business shall prepare a HMBP if that business uses, handles, or stores a hazardous material (including hazardous waste) or an extremely hazardous material in discloseable quantities greater than or equal to the following:

  • 500 pounds of a solid substance
  • 55 gallons of a liquid
  • 200 cubic feet of compressed gas  
  • Extremely hazardous substances in threshold planning quantities

Forms and Documents
Hazardous Material Business Plan (HMBP)
Annual Hazardous Materials Certification Form

Hazardous Waste Management Program

If your business has been identified as a generator of hazardous waste and/or universal waste, you must follow certain Federal and State hazardous waste laws. The intent of these laws is to ensure that hazardous waste will be properly managed to protect public health and the environment.

You may review California Hazardous Waste Control Statutes and regulations by visiting the Department of Toxic Substances Control web site at

Generator Class
Different regulations apply to hazardous waste generators depending on the monthly volume of hazardous waste produced.

Conditionally Exempt Small Quantity Generators (CESQG) are those who generate less than 100 KG per month. Accumulation start date is when the first 100 Kg of waste has been accumulated. Waste may be stored on site up to 180 days or up 270 days if the distance to the treatment or disposal facility is more than 200 miles.

Small Quantity Generators (SQG) are those who produce more than 100 Kg but less than 1000 Kg of waste or less than 1 Kg of acutely hazardous waste per month. Accumulation start date is the day 100 Kg of waste has been accumulated. Waste may be stored on site up to 180 days or up 270 days if the distance to the treatment or disposal facility is more than 200 miles.

Large Quantity Generators (LQG) generators who produce more than 1000 Kg per month of all hazardous waste generated on site. Accumulation start date is when the first waste is accumulated. There is a 90 day storage time limit.

Each generator class is subject to different regulations for employee training, training documentation and written contingency plans. For additional information, check DTSC’s web site for the following Fact sheets:

Accumulating Hazardous Waste at Generator Sites (Jan 2002)
Hazardous Waste Generator Requirements (Jan 2002)
Hazardous Waste Accumulation Time for Generators (Dec 2006)

Underground Storage Tank Program (UST)

Colusa County Environmental Health regulates the construction, operation, repair and removal of underground storage tank (UST) systems.

Typically, USTs are used to store large amounts of hazardous materials such as gasoline, diesel, biodiesel, and waste oils.  Underground storage of hazardous materials can be convenient, but also presents unique environmental and safety risks.

The purpose of the UST Program is to protect public health, the environment and groundwater from potential contamination or adverse effects associated with unintended releases from the underground storage of hazardous materials. 

Forms and Documents
UST Install/Modification/Repair Application
UST Install/Modification/Repair Guidelines
UST Closure Application
UST Closure Guidelines
Attachment A
Attachment B
Attachment C
Attachment D
UST Sample Workplan
Operating Permit Facility (Tank A)
Operating Permit Tank (Tank B)
UST Monitoring Plan
UST Response Plan
UST Financial Responsibility
Letter from Chief Finanacial Officer 
UST Owner/Operator Agreement

For more information:
California UST Program Home Page - State Water Resources Control Board

Aboveground Petroleum Storage Tank Program

The Certified Unified Program Agencies (CUPA’s) have the responsibility and authority to implement the Aboveground Petroleum Storage Act (APSA).

Facilities with a single tank or cumulative aboveground storage capacities of 1,320 gallons or greater of petroleum are covered by this law.

Exceptions to this rule include farms, nurseries, logging and construction sites if these businesses have a total storage capacity of less than 100,000 gallons or if the individual storage tanks are less than 20,000 gallons.

Petroleum means crude oil or any fraction that is liquid at 60 degrees Fahrenheit at normal atmospheric pressure. This includes petroleum-based substances comprised of a complex blend of hydrocarbons, such as gasoline, diesel, jet fuels, residual fuel oils, biodiesel, lubricants, some petroleum solvents, and used oils. Petroleum does not include liquid propane gas (LPG).

If your facility meets the 1,320 gallon threshold and is not a exempted facility, the follow must be met:

  • Submit a Tank Facility Statement Form (Unless a Hazardous Materials Inventory statement has been Submitted to CCEH)
  • Prepare a Spill Prevention Control & Countermeasure (SPCC) Plan.
    • Facilities storing ≥ 1,320 gallons but less than 10,000 gallons can self-certify the SPCC plan
      •  Facilities with no tank > 5,000 gallons (Tier I Facilities) may use the EPA SPCC template.
      •  Facilities with any individual tank > 5,000 gallons (Tier II Facilities) may self-certify but may not use the EPA SPCC template.
    • Facilities storing > 10,000 gal must have a registered professional engineer review and certify the SPCC plan.
  • Conduct periodic inspection to ensure compliance with Title 40 Code of Federal Regulations, Section 112
  • Immediate notification to the California Emergency Management and Colusa County Environmental Health upon discovery of a spill or release of 42 gallons or greater of petroleum. 

 Forms and Documents
Aboveground Tank Information

SPCC Tier I Template

SPCC Tier II Template

Spill Prevention Control and Countermeasure (SPCC) Plan

California Accidental Release Prevention (CalARP) Program

The CalARP Program was established to prevent accidental releases of substances that pose the greatest risk of immediate harm, to the public and the environment.

 A CalARP facility is a facility that handles, manufactures, uses, or stores any of the listed regulated substances found in tables 1-3 of the California Code of Regulations, Title 19 Division 2, Chapter 4.5 above threshold quantities. Some examples of regulated substances include:

  • Ammonia
  • Chlorine gas
  • Hydrochloric acid
  • Nitric acid
  • Propane

Colusa County Environmental Health coordinates with facilities that handle extremely hazardous materials to evaluate the risks of covered processes and require appropriate Risk Management Programs (RMP) at these facilities.

Regulatory Authority

  • State Law:  Health & Safety Code, Chapter 6.95, Article 2, starting with Section 25531
  • State Regulations: Title 19 of the California Code of Regulations, Chapter 4.5, starting with Section 2735.1
  • Federal Law: Clean Air Act 112(r)
  • Federal Regulations: Code of Federal Regulations 40

Additional Information about CalARP Requirements

  • The California Emergency Management Agency (formerly OES, CalEMA) web site.  CalEMA is responsible for implementing state regulations. This web site contains Fact Sheets, copies of state Laws and Regulations and useful links.
  • The Environmental Protection Agency's (EPA) web site.  EPA is the federal agency responsible for implementing federal regulations. This web site is an excellent source for general and technical guidance documents.