15 U.S. Code § 3611 - Additional remedies
(a) Suits at law or equity
(b) Recovery of actual damages
Every person who becomes liable to make any payment under this section may recover contributions from any person who if sued separately, would have been liable to make the same payment.
(d) Amounts recoverable; defendant’s attorneys’ fees
The amounts recoverable under this section may include interest paid, reasonable attorneys’ fees, independent engineer and appraisers’ fees, and court costs. A defendant may recover reasonable attorneys’ fees if the court determines that the cause of action filed by the plaintiff is frivolous, malicious, or lacking in substantial merit.