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    Complyrpedia is the knowledge base for businesses that are required to comply with California environmental regulations

CERS: Business Activities

The Business Activities task is part of the California Environmental Reporting System (CERS) compliance program.



CERS provides centralized information about the types, quantities and locations of hazardous materials located in California businesses. This information is used as part of community risk planning, public “right-to-know,” and to notify emergency response personnel of potential hazards. The CERS Business Activities task is a questionnaire that will dictate additional CERS tasks required for a given facility.

Getting to the Business Activities Form via the CERS Submission Facility Information Page

CERS Business Activities 1

To get to the “Business Activities” form: 

  1. Login to CERS and navigate to the facility you want to work on. Then select “Start/Edit Submittal.”
  2. Select “Edit,” to the right of “Business Activities,” in the “Facility Information” section.

Site Identification

CERS Business Activities 2

Within the Business Activities form is the “Site Identification” section. Use the “edit” buttons to get to the editing view.

The user can edit the:

The name and address must be the facilities’ PHYSICAL address, not a mailing address or a remote office location address.

Hazardous Materials

CERS Business Activities 3

The hazardous materials section is the most important one. 

Does your facility have on site (for any purpose) at any one time, hazardous materials at or above 55 gallons for liquids, 500 pounds for solids, or 200 cubic feet for compressed gases (include liquids in ASTs and USTs); or is regulated under more restrictive local inventory reporting requirements (shown below if present); or the applicable Federal threshold quantity for an extremely hazardous substance specified in 40 CFR Part 355, Appendix A or B; or handle radiological materials in quantities for which an emergency plan is required pursuant to 10 CFR Parts 30, 40 or 70?

If the answer to this question is “yes,” the facility will be obligated to report on CERS.

NOTE: Some Unified Program Agency might have additional reporting requirements that will be spelled out in a pink-orange text box within the “Hazardous Materials” section as seen in the image above.


Underground Storage Tanks (UST)?

CERS Business Activities 4

If a site owns or operates a UST that contains hazardous material check “Yes” to this question. An underground storage tank (UST) is defined by law as “any one or combination of tanks, including pipes connected thereto, that is used for the storage of hazardous substances and that is substantially or totally beneath the surface of the ground.” For more information on the definition of a UST in California please look here.

Hazardous Waste

CERS Business Activities 5

The hazardous waste portion of the CERS Business Activities task will also mandate additional reporting in CERS and trigger additional compliance obligations. 

  1. Does your facility generate Hazardous Waste?
    • If your facility generates any quantity of hazardous waste it is subject to both hazardous materials and hazardous waste requirements. If you answer “yes” to the this question, you will be required to provide a permanent EPA ID Number.
  2. Does your facility treat hazardous waste on-site?
    • Complyrs does not (currently) offer program support for hazardous waste treatment. If you answer “yes” to this question, contact us here if you need help.
  3. Does your facility consolidate hazardous waste generated at a remote site?
    • Complyrs does not offer (currently) program support for hazardous consolidation. If you answer “yes” to this question, contact us here if you need help.
  4. Does your facility need to report the closure/removal of a tank that was classified as hazardous waste and cleaned on-site?
    • Complyrs does not offer (currently) program support for hazardous waste tank closure and removal. If you answer “yes” to this question, contact us here if you need help.
  5. Does your facility generate in any single calendar month 1,000 kilograms (kg) (2,200 pounds) or more of RCRA (federally-regulated) hazardous waste, or generate in any single calendar month, or accumulate at any time, 1 kg (2.2 pounds) of RCRA acute hazardous waste; or generate or accumulate at any time more than 100 kg (220 pounds) of spill cleanup materials contaminated with RCRA acute hazardous waste? Do not check this if you only generate non-RCRA waste.
  6. Is your facility a Household Hazardous Waste (HHW) Collection site?
    • This question is asking if you collect HHW from other sites. If you only accumulate HHW from activities originating in the facility, check “No” to this question.


Excluded and/or Exempted Materials

CERS Business Activities 6

  1. Does your facility recycle more than 100 kg/month of excluded or exempted recyclable materials (per HSC 25143.2)?
    • Only check “YES” if you recycle more than 100kg/month ON-SITE. Check “NO” if you only send recyclable materials to an off-site recycler.

Aboveground Petroleum Storage

CERS Business Activities 7

  1. Does your facility own or operate aboveground tanks or containers with regulated storage greater than 1,320 gallons of petroleum products (new or used)?
    • If you have greater than 1,320 gallons of petroleum products in containers greater than 55-gallons (shell capacity), answer “Yes” to this question. 

Regulated Substances

CERS Business Activities 8

  1. Does your facility have Regulated Substances stored onsite in quantities greater than the threshold quantities established by the California Accidental Release prevention Program (CalARP)?
    • CalARP regulated substances are chemicals that are very hazardous and must be reported to the California Accidental Release Prevention Program.
    • Please note: Complyrs does not  currently provide a CalARP compliance program.

Additional Information

CERS Business Activities 9

There is an additional field to give information to your business activities submission.


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