Subsurface Environmental Liabilities in California: Navigating Water Code Section 13267 and 13304 Orders

For California property owners, industrial operators, and commercial developers, underground environmental contamination is a major legal and financial risk. State regulators closely monitor sites for volatile organic compounds (VOCs), heavy metals, and petroleum hydrocarbons. Specifically, oversight agencies prioritize vapor intrusion—which occurs when chemical vapors from contaminated soil or groundwater migrate upward into indoor air spaces.

If a site has a history of manufacturing, dry cleaning, or fueling operations, the Regional Water Board will often step in. Rather than allowing a voluntary cleanup, the Water Board uses California Water Code Sections 13267 and 13304 to order immediate investigation and cleanup. Failing to handle these orders correctly can lead to heavy daily fines and stalled real estate transactions.

The Power of the Water Board: Section 13267 vs. Section 13304 Orders

The Water Board has broad powers to investigate and clean up pollution that threatens state waters. However, the level of proof required for regulators to issue these two orders differs significantly. As a rule of thumb, Section 13267 investigative orders require mere suspicion, while Section 13304 cleanup orders require substantial evidence.

1. Water Code Section 13267: Investigative Orders

Section 13267 is the Water Board’s primary exploration tool. The legal standard required to issue a 13267 order is very low. The statute allows the board to demand technical reports from anyone who is “suspected of having discharged or discharging” waste.

Regulators do not need definitive proof of a spill to issue this order. They can justify their suspicion using:

• Proximity and Industry Standards: Operating a business type historically known for chemical use (like a dry cleaner or auto repair shop) near a known groundwater plume.
• Historical Public Records: Old business licenses or fire insurance maps showing that hazardous substances were used on the property decades ago.
• Visual or Desktop Anomalies: Historical photos or records suggesting outdoor chemical storage or old underground tanks.

The Boards face one main restriction: the financial cost of the required reports must be reasonable compared to the environmental benefit. Failing to comply with a 13267 order can result in fines of up to $1,000 per day.

2. Water Code Section 13304: Cleanup and Abatement Orders (CAOs)

When the Water Board graduates from an investigation to a formal Cleanup and Abatement Order (CAO) under Section 13304, the legal standard rises significantly. The Board can no longer rely on mere suspicion or proximity. To legally name a business as a “Responsible Party,” the Board must possess substantial evidence showing that the party actually caused or permitted a discharge of waste.

To withstand a legal challenge, a CAO must rely on clear, site-specific technical data:

• Subsurface Sampling Records: Lab tests confirming contaminants in the soil, soil vapor, or groundwater beneath the property.
• Chemical Fingerprinting: Scientific analysis proving that the specific chemicals in the ground match the products used by the facility, rather than a neighboring property.
• Documented Discharge Events: Official agency records or verified witness accounts of actual spills or illegal disposal on the property.

CAOs carry massive financial burdens. They frequently require extensive soil removal, soil vapor extraction (SVE) systems, or groundwater containment. Failing to follow a CAO can lead to court injunctions or fines of up to $5,000 per day.

Vapor Intrusion and Evolving Screening Levels

A major driver behind recent 13267 and 13304 orders is the regulatory shift surrounding vapor intrusion. The Department of Toxic Substances Control (DTSC) and Regional Water Boards use very strict screening levels for indoor air safety.

Because these screening thresholds change as scientific knowledge evolves, regulators frequently reopen sites that achieved official “closure” years ago. If historical solvents like trichloroethylene (TCE) or tetrachloroethylene (PCE) are discovered migrating beneath an active commercial building, regulators will enforce strict mitigation or cleanup protocols under Section 13304.

These obligations do not apply only to heavy industrial factories. Retail strip malls with a history of dry cleaners, commercial gas stations, and automotive centers routinely face sweeping investigative mandates simply due to their proximity to suspected chemical plumes.

The Strategic Role of Legal Counsel in Managing Subsurface Orders

When facing a 13267 or 13304 order, relying entirely on an environmental consultant can expose a business to risk. While consultants handle the technical testing, an attorney oversees the legal strategy and protects the company’s financial interests.

Experienced environmental counsel assists clients by:

• Contesting Responsible Party Scope: Reviewing historical deeds and leases to ensure the Water Board has not improperly blamed a current owner or tenant for legacy contamination caused by a previous occupant.
• Negotiating Technical Directives: Interfacing with Water Board staff to narrow overly broad or expensive sampling demands. Under Section 13267, counsel can argue that the financial burden of drilling test wells outweighs the actual regulatory benefit.
• Establishing Legal Privilege: Keeping site reviews and compliance audits confidential under attorney-client privilege to shield proprietary data from public disclosure or third-party lawsuits.
• Pursuing Cost Recovery: Negotiating with or litigating against historical operators, prior owners, or insurance carriers to help fund the mandated cleanup activities.

Frequently Asked Questions

What should a business do immediately upon receiving a Water Code Section 13267 or 13304 order?

Do not ignore the order, and do not miss the initial deadlines. Immediately preserve all historical site records, environmental assessments, and past lease agreements. Before speaking directly with Water Board staff, consult an environmental attorney to review the order and outline a defensive strategy.

What is the difference between a 13267 order and a 13304 order?

A Section 13267 order is an investigative mandate requiring technical reports based on a regulatory suspicion of a discharge. A Section 13304 order is a full Cleanup and Abatement Order issued once a release is confirmed by substantial evidence, requiring physical remediation or mitigation systems.

Can a property owner be held liable for contamination caused by a historical tenant or former owner?

Yes. Under California law, a current property owner can face liability as a “discharger” under Section 13304 simply by owning land where a contamination plume exists, regardless of who originally spilled the chemicals. An attorney can evaluate whether the owner can pursue cost recovery from the responsible tenant.

How does the Regional Water Board enforce compliance with these orders?

The Water Board can issue Administrative Civil Liability complaints that carry heavy daily financial penalties. If a responsible party fails to comply, the board can refer the matter to the California Attorney General to seek a court injunction, or use state funds to clean up the site and sue the owner for full reimbursement.