Throughout their careers in government and private practice, the attorneys of Periconi, LLC have played an instrumental role in several significant cases that influenced the evolution of environmental law. For example:

Committee for Environmentally Sound Development, Inc. v. City of New York, 737 N.Y.S.2d 792 (N.Y. Sup. Ct. 2001). A State Supreme Court justice adopted Mr. Periconi's novel "continuing duty" under SEQRA argument regarding the enforcement of restrictions in an environmental impact statement years after it was written (when the project was actually built).

United States v. CDMG Realty Co., 96 F.3d 706 (3d Cir. 1996). Mr. Periconi successfully advanced the argument, never before adopted, that there need be no minimal amount of construction-related movement of hazardous wastes in the ground to constitute a "disposal."

Idylwoods Associates v. Mader Capital, Inc., 915 F.Supp. 1290, 26 Envtl. L. Rep. 21,027 (W.D.N.Y. 1996). In this groundbreaking CERCLA decision, Mr. Periconi successfully advanced Superfund liability principles, including parent-subsidiary liability, corporate veil piercing, the liability of dissolved corporations and alternate theories of recovery of damages.

Wedinger v. Goldberger, 71 N.Y.2d 428 (1988)

Waterside Associates v. New York State Dept. of Environmental Conservation, 72 N.Y.2d 1009 (1988)

Consolidated Edison Co. of New York v. New York State Dept. of Environmental Conservation, 112 A.D.2d 989 (2d Dep't 1985)

Abrams v. LCARA, 132 Misc.2d 232, aff'd, 134 A.D.2d 885 (4th Dep't 1987)

New York Coastal Fishermen's Ass'n v. New York City Dept. of Sanitation, 772 F.Supp. 162, 22 Envtl. L. Rep. 20,183 (S.D.N.Y. 1991). Mr. Periconi served as Special Master.

State v. Gorsuch, 554 F.Supp. 1060 (S.D.N.Y. 1983). After having previously obtained a declaration that the EPA Administrator had failed to perform a nondiscretionary duty imposed on her by the Clean Air Act, Mr. Periconi and his colleagues succeeded in obtaining summary judgment on the issue of a remedy and on an order enforcing the statutory timetable to regulate arsenic.

People v. J.R. Cooperage Co., Inc., 485 N.Y.Supp.2d 438 (Sup. Ct. Kings Co. 1985). Mr. Periconi's legal work sustained an important early indictment under New York's then new felony environmental criminal statute on the sufficiency of evidence before the grand jury, against both the corporate president as well as the corporation. He later obtained jury guilty verdicts against both.