Exhibit 3.427

STATE OF DELAWARE

SECRETARY OF STATE

DIVISION OF CORPORATIONS

FILED 09:00 AM 04/04/1996

960099184 — 2610854

CERTIFICATE OF FORMATION
OF
D & L DISPOSAL L.L.C.

A LIMITED LIABILITY COMPANY

          FIRST: The name of the limited liability company is:

D & L Disposal L.L.C.

          SECOND: The address of the limited liability company’s registered office in the State of Delaware is 1209 Orange Street, in the City of Wilmington, County of New Castle. The name of its registered agent at such address is The Corporation Trust Company.

          THE UNDERSIGNED, being the individual forming the limited liability company, has executed, signed and acknowledged this Certificate of Formation this 4th day of April, 1996.

/s/ Blaine A. Lamperski  

Blaine A. Lamperski