Region 4 CII Permit: Is the Property Owner or Tenant Responsible for Compliance?

Determining CII stormwater owner-tenant responsibility requires more than checking the property deed or identifying who runs the facility each day. Under Order R4-2026-0226, the Discharger is either the owner or operator of the CII site, depending on who has sufficient authority and operational control to satisfy every applicable permit condition.1

The responsible party must be able to prepare and implement the site-specific SWPPP and fulfill the requirements of the selected Compliance Option. Depending on the property, that authority may rest with the owner, the tenant or lessee, or an owner-and-operator structure. Determining the appropriate Discharger may require reviewing property ownership, lease arrangements, operational control, existing permit records, and applicable signatory requirements before the Notice of Intent is certified.

Under the Region 4 CII Permit, is the owner or tenant responsible?

The adopted CII Permit does not make the parcel owner or tenant automatically responsible in every case. Attachment A defines the Discharger as either the owner or operator of the CII site, whoever has the authority and operational control to comply with all conditions of the General Permit. The permit defines the owner as the owner of the parcel and the operator as the lessee of that parcel.1

The definition connects responsibility to the party’s ability to prepare and implement the site-specific SWPPP and fulfill the requirements of the Compliance Option selected under the General Permit.1

Attachment G reinforces that the permit can accommodate different responsibility structures. The NOI includes a Discharger Role field with selections for Owner, Operator, or Owner and Operator.1

The Owner, Operator, and Owner and Operator selections in Attachment G should be evaluated against the permit’s Discharger definition and the site’s actual ownership and operational-control structure.

What does “authority and operational control” actually mean?

Authority and operational control should be evaluated against the full compliance program rather than a person’s job title or the general statement of responsibility in a lease.

The permit’s definition asks whether the party can satisfy all conditions of the General Permit. The analysis therefore extends beyond control of housekeeping or daily facility operations. It also includes authority over the SWPPP and whichever compliance option the facility selects.

As a practical, non-exclusive screening framework, relevant records may help show which party controls activities and decisions associated with permit compliance. Examples may include evidence of who can:

• Retain and direct stormwater consultants
• Approve or revise the SWPPP
• Implement and maintain minimum BMPs
• Correct pollutant-source or drainage problems
• Control access to discharge locations
• Coordinate observations, sampling, and inspections
• Train employees and maintain compliance records
• Enter facility-related compliance agreements
• Authorize stormwater-control design, construction, and maintenance
• Commit the necessary operating or capital budget
• Certify enrollment documents through an eligible representative

These factors help document how authority operates at the site. They are not separate legal tests that replace the adopted permit definition.

For example, a tenant might control loading, outdoor storage, equipment maintenance, employee training, and daily BMPs. The owner might separately control parking areas, roof drainage, common conveyances, building permits, and structural improvements. The parties must determine which Discharger role is consistent with the permit’s definition and the site’s actual allocation of authority and operational control.

Private lease provisions can help explain the allocation of responsibility, but contractual labeling alone does not alter the Water Board’s definition. When the analysis turns on the interpretation or enforceability of lease language, the parties should obtain legal advice in addition to technical stormwater review.

When might the property owner qualify as the Discharger?

A property owner may qualify as the Discharger when it has the authority and operational control required by the permit’s definition.

As part of a site-specific review, potentially relevant indicators may include owner control over:

• Common-area drainage and stormwater infrastructure
• Parking lots, roofs, private roads, and shared discharge locations
• Capital improvements and building permits
• Facility-wide consultant access
• Structural stormwater controls
• Long-term operation and maintenance obligations
• Agreements involving the property or watershed projects
• Compliance across a single-tenant or multi-building property
• Environmental records and reporting for the entire site

Owner control can be particularly relevant if the selected Compliance Option requires permanent stormwater infrastructure, significant site modifications, or a legally binding agreement affecting site-wide obligations.

The Fact Sheet recognizes that property owners typically control permits for onsite stormwater infrastructure, while the allocation of responsibility for easements and rights of way may depend on the relevant agreement between the owner and operator.1

Ownership alone, however, does not resolve the analysis. An owner that lacks control over facility operations, pollutant-generating activities, SWPPP implementation, or required monitoring may not automatically satisfy the adopted authority-and-operational-control standard. The actual operating structure still requires review.

When might the tenant or lessee qualify as the Discharger?

The tenant may qualify as the CII Permit operator because the adopted permit defines an operator as the lessee of the parcel. The tenant must also possess enough authority and operational control to comply with all permit conditions.1

As part of a site-specific review, potentially relevant indicators may include tenant control over:

• Daily pollutant-generating activities
• Outdoor storage, loading, maintenance, and material handling
• Housekeeping and minimum BMP implementation
• Employee training
• Existing SWPPP procedures and revisions
• Sampling access and operating schedules
• Inspection, monitoring, and laboratory coordination
• Corrective actions
• Environmental records and reporting
• Contracts and expenditures required by the selected compliance option

Consider a hypothetical industrial tenant that already manages its Industrial General Permit coverage and implements the facility’s Industrial SWPPP. That existing role may provide evidence that the tenant controls pollutant sources, BMPs, monitoring, records, and corrective actions.

It does not automatically make the tenant the Discharger under the new CII Permit. The parties must still determine whether the tenant has authority over every obligation relevant to the selected CII compliance option, including any structural or contractual commitments outside its existing IGP authority.

When existing IGP and SWPPP responsibilities are part of the analysis, Industrial SWPPP Services can support review of the current stormwater program. Industrial Inspections and Monitoring may also support field-oriented evaluation of operational control, monitoring access, and existing compliance responsibilities.

What about campuses, common developments, and split control?

Multi-parcel and shared-control sites may require a more detailed responsibility analysis.

Attachment A provides that when one entity owns or operates a campus of multiple qualifying parcels, the owner or operator may obtain one permit covering all qualifying parcels. A campus may include contiguous parcels, parcels separated by an easement, right of way or public street, or another group of related parcels approved by the Executive Officer.1

For qualifying parcels owned by different entities that form a common development, the adopted permit allows each parcel owner to obtain separate coverage or the owners to obtain consolidated coverage.

These provisions do not resolve every owner-versus-operator question. A campus may still include:

• Common areas controlled by the owner
• Tenant-controlled operational areas
• Shared drainage infrastructure
• Different existing stormwater permits
• Easements or rights of way with separate maintenance obligations
• Multiple discharge locations under different access arrangements

The applicable Discharger structure should be evaluated using the permit’s definition together with the ownership and operational-control arrangement across the qualifying property. This article does not replace the separate parcel-level analysis required for campus, contiguous-parcel, common-development, or partial-coverage cases.

Who signs the CII Permit documents in SMARTS?

Identifying the Discharger and identifying the authorized signer are related but separate tasks.

Section 10.4 requires the NOI and all Permit Registration Documents to be certified and submitted through SMARTS by the Discharger’s Legally Responsible Person, or LRP. Other reports may be certified and submitted by the LRP or a properly designated Duly Authorized Representative, or DAR.1

Attachment D identifies the eligible LRP categories. Depending on the entity, the signer may be:

• A responsible corporate officer or an appropriately authorized manager
• A general partner or sole proprietor
• A person authorized to contract for a private institution
• The individual when the regulated entity is an individual
• An authorized person with managerial authority for another eligible entity type

A consultant or contractor does not become eligible to serve as the LRP merely by preparing the SWPPP or managing the SMARTS process. Attachment D expressly states that a third party that does not satisfy an eligible LRP category is not qualified to serve in that role.1

A DAR may certify certain later reports when the LRP provides the required written authorization and submits it through SMARTS. Documents certified and submitted via SMARTS by an unauthorized or ineligible LRP or DAR are invalid under the permit.1

Once the correct Discharger and LRP structure has been established, SMARTS Permitting and Application Services can support applicable enrollment and reporting workflows.

How should owners and tenants resolve responsibility before enrollment?

Before enrollment, owners and tenants may need to document how ownership and operational control align with the permit’s Discharger definition. As a practical project-review framework, relevant steps can include:

1. Map parcel ownership. Identify the owner of each qualifying parcel and any related campus or common-development structure.
2. Identify the operator or lessee. Confirm which entity leases and operates each relevant part of the property.
3. Review existing permit coverage. Record any IGP, NEC, NONA, other NPDES coverage, SWPPP, or partial-coverage arrangement.
4. Map operational control. Identify who controls outdoor activities, pollutant sources, housekeeping, BMPs, employee training, access, monitoring, records, and corrective actions.
5. Map property and capital authority. Determine who controls drainage infrastructure, common areas, building permits, structural improvements, budgets, and long-term maintenance.
6. Evaluate the proposed Discharger role against the applicable Compliance Option. Consider whether the proposed Discharger has the authority and operational control needed to fulfill the requirements associated with the Compliance Option the facility expects to select. 
7. Identify the eligible LRP. Confirm which individual meets the applicable signatory category for the Discharger entity.
8. Document split or unresolved responsibilities. Record where lease language, actual operations, or capital authority do not align.
9. Obtain legal review where necessary. Counsel should address lease interpretation, indemnity, enforceability, or disputes between the parties. A technical stormwater review should not substitute for legal advice.
10. Confirm the proposed responsibility structure before certification. Evaluate the NOI role against the permit’s Discharger definition and the documented ownership and operational-control structure.

Clarify CII Permit Responsibility Before Enrollment

Owner-versus-tenant responsibility can become complicated when property ownership, day-to-day operations, stormwater infrastructure, existing NPDES coverage, and signatory authority are divided between different parties. Resolving those questions before enrollment can help the property team identify issues that require technical or legal clarification and avoid relying on an owner-only or tenant-only assumption that does not match the permit’s Discharger definition.

If your property may be subject to the Region 4 CII Permit and the appropriate Discharger is unclear, request a technical Discharger responsibility review before the NOI is certified. Provide the parcel and ownership information, relevant lease or responsibility documents, existing NPDES/IGP status, SWPPP responsibility, and information showing who controls site operations, stormwater infrastructure, monitoring, budgets, contracts, and corrective actions. Where responsibility depends on lease interpretation, contractual liability, or enforceability, those legal questions should be reviewed by qualified legal counsel.

When ownership changes after enrollment, Section 3.6 requires the prior Discharger to submit a Notice of Termination and notify the new Discharger in writing of the permit application and coverage requirements. The new Discharger must apply for coverage through SMARTS in accordance with the applicable enrollment provisions.1

Until a valid NOT is received and approved, the prior Discharger remains responsible for compliance with the General Permit and payment of accrued annual fees.