Does Your Facility Need a Tiered Permit?
California regulates on-site hazardous waste treatment under the state’s tiered permitting program, and a facility that treats its own waste needs authorization at one of five regulatory tiers.
Most California facilities that need a tiered permit don’t call asking for one. They call asking about something else. A tank certification. A wastewater question. A CUPA inspector who left a list. Somewhere in that conversation a CDMS consultant asks what the facility does with its hazardous waste, and the answer turns out to be: “We treat some of it here before we ship it out.”
That answer is the beginning of a tiered permitting question. California regulates on-site hazardous waste treatment under the state’s tiered permitting program, and a facility that treats its own waste needs authorization at one of five regulatory tiers. The question of whether your facility falls under the program is a determination, not a guess.
For a full overview of the program and the five tiers, see our California tiered permitting and hazardous waste treatment guide. This piece focuses on one thing: how to tell whether your operation is even in scope.
The Three-Question Test
The determination starts with three questions. They sound simple. They aren’t, because most of the work is in defining each term the way California defines it.
1. Is the material waste?
A material is waste when the generator no longer intends to use it for its original purpose. Plating bath drag-out, spent solvents, evaporator concentrates, off-spec product set aside for disposal: all waste. A material kept in a process tank and reused is generally not. The line is intent.
2. Is the waste hazardous?
Hazardous means hazardous under California’s definition, which is broader than the federal definition. California regulates wastes by characteristic (ignitability, corrosivity, reactivity, toxicity) and by listing, and adds California-only hazardous waste codes that federal RCRA does not. Your CERS chemical inventory and your waste manifests are the first place to look.
3. Is treatment occurring?
This is where most facilities miscount themselves. Treatment is any process that changes the physical, chemical, or biological character of the waste. That includes operations facilities rarely think of as “treatment”: pH adjustment, neutralization, precipitation, flocculation, phase separation, filtration, drying, drum rinsing, can crushing, and cyanide oxidation. If you are doing any of those to your own hazardous waste before it leaves the site, you are treating.
If the answer to all three is yes, your facility almost certainly falls under tiered permitting. If the answer to any one is no, it probably does not. A facility that generates hazardous waste and ships it out without treating it is a generator, not a treater, and the tiered permitting program does not apply.
What “Treatment” Looks Like in the Field
When we walk a facility, the operations that most often trigger the determination are the ones the client describes in plain process terms, not regulatory terms. A few common examples:
- A metal-finishing line with an in-line pH adjustment tank that brings rinse water into range before it goes to a precipitation tank.
- A small evaporator reducing the volume of a hazardous waste stream before it ships.
- A drum rinsing station where empty containers are triple-rinsed before reuse or disposal.
- A filtration unit pulling solids out of a spent cutting fluid.
- A can crusher for aerosol cans where the contents qualify as hazardous.
- A cyanide treatment system using chlorine, sodium hypochlorite, or ozone-peroxide oxidation. Cyanide treatment carries its own specialized regulatory requirements within the program.
A facility can have one of these and not know it is regulated as a treatment unit. That is the most common pattern we see.
Fixed Treatment Unit vs. Transportable Treatment Unit
Once treatment is established, the next question is what kind of treatment unit you operate. California recognizes two:
| Unit type | What it is | Where it lives | Typical CDMS client |
|---|---|---|---|
| Fixed Treatment Unit (FTU) | A treatment unit permanently installed at a single facility, treating waste generated at that same facility. | Stays put. Often hard-piped into the process. | Most CDMS clients are FTU operators (metal finishing, plating, aerospace, electronics, semiconductor). |
| Transportable Treatment Unit (TTU) | A treatment unit designed to move from site to site, treating waste at the location where it’s deployed. | Moves between facilities. | Less common. Some specialty operations. |
FTUs are by far the more common scenario. The tier your facility ends up in (Full Permit, Standardized Permit, Permit by Rule, Conditional Authorization, or Conditionally Exempt) depends on what you treat, how much, and how. The five tiers of California hazardous waste treatment permitting piece explains where each tier applies; the most common tier for CDMS clients is Permit by Rule, which we cover in depth in Permit by Rule (PBR) compliance in California.
Exemptions and Edge Cases
Two boundary cases come up regularly:
- The waste isn’t hazardous. If the input to your treatment is not a hazardous waste, the operation falls outside tiered permitting even when treatment is occurring. The exception that surprises clients: if the output becomes hazardous (an evaporator concentrating a non-hazardous stream into a hazardous one), it doesn’t pull the treatment back into the program either, but it can change your generator status and downstream obligations.
- Recycling and silver recovery. Specific California exemptions exist for silver recovery from photographic waste and for recycling operations where most of the material is recycled. These are narrow exemptions with conditions; they are not a way around the program when the operation doesn’t fit.
If your facility was previously told it was exempt by a prior provider or by a state inspector, that opinion is worth verifying. CERS, the state’s online environmental reporting portal, now flags inconsistencies between a facility’s chemical inventory and its declared waste activities more readily than paper submittals ever did. Facilities that operated quietly without consequence for years are now getting questioned.
What Usually Prompts the Question
Facilities almost never wake up and decide to make this determination on their own. The trigger is usually one of the following:
- A CUPA inspector (your local CUPA, which may be a county environmental health department, fire department, or another local agency depending on jurisdiction) asked about an operation and the answer didn’t match the paperwork.
- The facility is expanding. A new plating line, a new chemistry, a new evaporator. Expansion changes the picture and may change the tier.
- A gap assessment or compliance audit surfaced a treatment unit that was never authorized.
- A previous EHS provider departed and no one is sure what the prior submittals covered.
- CERS flagged something during a routine update.
- The facility relocated or opened a new site and is rebuilding its permit stack from scratch.
These are the conversations where the determination question is most useful. Done early, it scopes the rest of the work. Done late, it becomes a deficiency response.
Why the Determination Is a Project, Not a Phone Quote
A tier determination is a contracted scoping step. It’s not something a consultant can responsibly answer from a phone call, and it isn’t something CDMS gives away as a sales-stage freebie. The reason is simple: a wrong determination cascades. If a facility is told it qualifies as Conditionally Exempt when the actual operation is Permit by Rule, the next CUPA inspection will catch it. The response will include not just the corrected tier but a deficiency letter for the missing components.
A proper determination reviews your CERS submittals, your waste manifests, your chemical inventory, your treatment unit count and type, your tank certification status, and your operating practices. It produces a documented finding that tells you which tier (if any) applies and what a complete submittal at that tier would include. From there, scoping the rest of the work, the compliance plan, the contingency plan, the tank and containment certification, the closure cost estimate, the CERS submittal, is straightforward.
Trusted throughout California
BSY started working with CDMS last year after our in-house EHS person departed the company. CDMS reviewed our existing operational permits as well as any additional Federal, State and Local regulations that could apply and helped us to create a comprehensive compliance calendar to track regulatory deadlines and submittal due dates. The CDMS team does an excellent job of tracking everything and can be relied upon to complete the forms accurately and assist with submittals, allowing me to focus on our business.
Speak with a CDMS EHS expert
Tell us about your facility and your deadline. You’ll get a clear read on what applies and a scoped plan to handle it.