Hazardous Waste Expert Witness

Overview

About Hazardous Waste Expert Witnesses

A hazardous waste expert answers three questions: was this material a regulated waste, who sent it or handled it, and who should pay to clean it up? Most disputes come down to old records, chemical fingerprints and money. This page covers waste regulation and cleanup liability. Transport of hazardous materials, groundwater movement, and toxic injury each have their own experts.

Two federal statutes run the field, and they ask different questions. RCRA looks forward and regulates waste from generation to disposal. CERCLA, the Superfund law, looks backward and assigns the cost of contamination that has already happened.

RCRA: Is It a Hazardous Waste?

The statute defines hazardous waste as a solid waste that, because of its quantity, concentration, or physical, chemical, or infectious characteristics, may cause or significantly contribute to serious illness or death, or pose a substantial hazard when improperly managed ¹. Solid waste is broad, reaching garbage, sludge and other discarded material, including solid, liquid, semisolid, or contained gaseous material ¹.

The generator carries the first duty. Under 40 CFR 262.11, a person who generates a solid waste must make an accurate determination as to whether it is hazardous, and that determination must be made at the point of generation, before any dilution, mixing, or other alteration ². An expert reads the process, the safety data sheets, the laboratory data and the manifests, and asks whether the classification was right when it was made.

Private parties can enforce RCRA. Its citizen suit provision reaches anyone who has contributed or is contributing to the handling, storage, treatment, transportation, or disposal of solid or hazardous waste which may present an imminent and substantial endangerment to health or the environment ³. Experts on both sides address whether the present condition of the site meets that language, and what work would abate it.

CERCLA: Who Pays

Section 107 reaches four classes of parties: current owners and operators of a facility, those who owned or operated it at the time of disposal, those who arranged for disposal or treatment, and certain transporters ⁴. Liable parties owe government response costs not inconsistent with the National Contingency Plan, and other parties' necessary response costs consistent with it, plus natural resource damages ⁴. The defenses are narrow: an act of God, an act of war, and an act or omission of certain third parties ⁴.

The Supreme Court has limited two of the theories:

• Arranger liability. In Burlington Northern v. United States, the Court held that an entity may qualify as an arranger when it takes intentional steps to dispose of a hazardous substance, and that mere knowledge of continuing spills and leaks was not enough ⁵. So the expert's account of a seller's actual practices, including steps it took to prevent spills, can matter.
• Parent companies. In United States v. Bestfoods, the Court held that a parent corporation may be charged with derivative liability only when the corporate veil may be pierced, and it also recognized direct liability for operating a facility ⁶. The evidence then concerns who actually ran the plant's environmental affairs.

Allocation and Apportionment

These two ideas are often confused, and an expert should keep them apart. Apportionment asks whether the harm can be divided at all. In Burlington Northern, the Court upheld a share of 9% for the railroads, calculated from three figures, including the percentage of the facility's area ⁵. Allocation comes later, when liable parties fight among themselves. In a contribution claim, the court may allocate response costs using such equitable factors as it determines are appropriate ⁷. Those commonly draw on volume, toxicity, time on site and cooperation, so the expert's work is a reasoned model, not a single fact. Records are often missing, and the opposing expert will test each assumption.

Was the Cleanup Consistent With the NCP?

Private recovery depends on this. Under 40 CFR 300.700, a private response action is consistent with the National Contingency Plan if, evaluated as a whole, it is in substantial compliance with the listed requirements and results in a CERCLA-quality cleanup ⁸. An action carried out in compliance with an EPA order or a consent decree is treated as consistent ⁸. Expert testimony often targets public participation, remedy selection, and cost documentation. Timing matters too: the statute sets limits on when actions may be brought, including a period of 3 years for certain damages claims ⁷. Counsel should map those early.

Who Is Qualified, and Who Does What

No single license applies. A strong witness may be an environmental engineer or chemist with hands-on RCRA or Superfund experience, or a former EPA or state regulator. Separate the roles. A compliance specialist addresses waste classification. An environmental engineer addresses the remedy and its cost. A hydrogeologist addresses how contamination moved. An allocation expert addresses shares, and a chemist can address chemical fingerprinting to link a waste to a source.

Qualifications

Qualifications to Look For

• ✓Environmental engineering, chemistry, or related technical background
• ✓Hands-on experience with RCRA compliance or Superfund investigations and cleanups
• ✓Former EPA or state environmental agency experience, where relevant
• ✓Working command of 40 CFR Part 262 and the National Contingency Plan
• ✓Experience reconstructing site history from manifests, permits, and old records
• ✓For allocation, experience building and defending equitable share models
• ✓Prior deposition and trial testimony experience in environmental cases

FAQ

Frequently Asked Questions