CERCLA — Consent Decree vs. UAO

Consent Decree vs. Unilateral Administrative Order: The Strategic Choice

After the ROD is issued, EPA has two primary tools for compelling remediation: negotiate a consent decree with cooperative PRPs, or issue a Unilateral Administrative Order (UAO) compelling immediate response action. For Enrique's client, the choice between these paths is the highest-stakes strategic decision in the CERCLA lifecycle.

The Consent Decree

A consent decree is a negotiated settlement entered as a judicial order in federal district court. Key features:

Contribution protection under § 9613(f)(2). This is the consent decree's most valuable asset. A PRP that resolves its liability to the government "through an administrative or judicially approved settlement" is protected from contribution claims by non-settling PRPs. In multi-PRP scenarios, early settlers can then assert § 9613(f)(1) contribution claims against non-settlers -- while being shielded from the reverse.

Judicial oversight. The consent decree is reviewed and entered by a federal court. Judicial approval requires the decree to be "fair, reasonable, and consistent with the purposes of CERCLA." The review provides a layer of protection against future government overreach: EPA cannot unilaterally modify a judicially approved consent decree.

Negotiated scope. Consent decree negotiations allow PRPs to define the remedial work required, the schedule, and the oversight mechanics. The allocation of responsibility among co-settling PRPs is worked out before entry.

Covenant not to sue. EPA typically covenants not to sue settling PRPs for matters addressed in the consent decree, subject to reopeners (primarily for undiscovered conditions or changed cleanup standards). Enrique's negotiating focus: minimize the reopener language.

The Unilateral Administrative Order (UAO)

A UAO is issued by EPA under CERCLA § 9606 and requires named respondents to perform response actions. It is not a settlement -- it is a command.

No judicial review before compliance. This is the defining feature of a UAO. A recipient cannot go to court before the compliance deadline and seek to block the UAO. The only legal challenge is to refuse to comply and then raise defenses in the enforcement action that follows -- but by then, the penalties are already accruing.

Penalties for non-compliance. A party that "without sufficient cause" refuses to comply with a UAO faces two separate liability exposures. First, punitive damages of up to three times the cleanup costs EPA incurs as a result of the non-compliance, under 42 U.S.C. § 9607(c)(3). Second, civil penalties of up to $71,545 per day (inflation-adjusted under 40 C.F.R. § 19.4, effective January 8, 2025; the statutory cap in § 9606(b)(1) is $25,000/day). "Sufficient cause" is a high bar -- only available if the respondent has a genuine good-faith belief that it is not liable.

No contribution protection. Compliance with a UAO does not provide contribution protection under § 9613(f)(2) -- that protection attaches to administrative or judicially approved settlements, and a UAO is neither. A PRP who complies with a UAO and then seeks contribution from co-PRPs must bring its claim under § 9613(f)(1) (which requires a prior judgment or settlement) or § 9607(a) (cost recovery), with more uncertainty about the contribution protection available.

Reading EPA's Leverage

EPA uses the UAO when negotiations have broken down or to pressure holdout PRPs. The UAO-or-consent-decree choice is often EPA's, not the PRP's -- but Enrique can influence the calculus:

EPA's incentives favor consent decrees. Negotiated consent decrees are faster, more predictable, and less resource-intensive for EPA than enforcement litigation. EPA has stated policy preferences for negotiated cleanup. PRPs who engage cooperatively reduce EPA's incentive to resort to UAOs.

Orphan share. If some PRPs are insolvent or cannot be located ("orphan shares"), EPA sometimes agrees to absorb a portion of those costs in a consent decree rather than pursue a UAO against all solvent PRPs. This orphan share negotiation is a lever available only in the consent decree track.

Challenging a UAO. The constitutional challenge to UAOs (on due process grounds) has largely failed in the courts. GE Co. v. Jackson, 610 F.3d 110 (D.C. Cir. 2010), rejected GE's argument that the UAO scheme was unconstitutional, holding the penalty risk does not constitute a deprivation requiring pre-compliance judicial review. Comply-then-challenge is the only viable path after a UAO is issued.