OKLAHOMA CITY

Irwin H. Steinhorn

John W. Funk

Jared D. Giddens

Robin F. Fields

Kiran A. Phansalkar

Victor F. Albert

Mitchell D. Blackburn

Mark H. Bennett

Bryan J. Wells

J. Dillon Curran

C. Brad Williams

Justin L. Pybas

John J. Griffin

Crystal A. Johnson
___________

Peter B. Bradford

TULSA

Henry G. Will

Lynnwood R. Moore, Jr.

Robert A. Curry

Steven W. McGrath

D. Richard Funk

J. Ronald Petrikin

Larry B. Lipe

James E. Green, Jr.

Martin R. Wing

John W. Ingraham

Andrew R. Turner

Gary L. Betow

Gentra Abbey Sorem

R. Kevin Redwine

Tony W. Haynie

Bruce W. Freeman

David R. Cordell

C. Raymond Patton, Jr.

Paul E. Braden

Robert J. Melgaard

P. Scott Hathaway

Lawrence A. Hall

Timothy T. Trump

Mark E. Dreyer

Teresa Meinders Burkett

Nancy E. Vaughn

Mark D. Berman

Katherine G. Coyle

Beverly K. Smith

Melodie Freeman-Burney

R. Richard Love III

Robert D. James

Stephen R. Ward

Jeffrey R. Schoborg

Anne B. Sublett

J. Ryan Sacra

Jason S. Taylor

Katy Day Inhofe

Julia Forrester-Sellers

Melinda L. Kirk

P. Bradley Bendure

Conner & Winters, LLP

1700 One Leadership Square

211 North Robinson

Oklahoma City, Oklahoma 73102-7101

405-272-5711

Fax 405-232-2695

www.cwlaw.com

___________

Kathryn J. Kindell

Alissa A. Hurley

Jed W. Isbell

Paige N. Shelton

Jason B. Coutant

Allison McGrath Gardner

Elizabeth G. Zeiders

David S. Randolph

Kathryn S. Burnett
___________

Joseph J. McCain, Jr.

William G. von Glahn

Bob F. McCoy
___________

Lynn P. Mattson

James R. Ryan

Russell H. Harbaugh, Jr.

David O. Cordell

NORTHWEST ARKANSAS
John R. Elrod¹

Robert L. Jones, III¹

Greg S. Scharlau

Vicki Bronson

Todd P. Lewis¹

P. Joshua Wisley

Kerri E. Kobbeman²

Amber Prince¹___________

Terri Dill Chadick

Charles E. Scharlau¹

WASHINGTON, D.C.

G. Daniel Miller¹

Donn C. Meindertsma¹

Rabeha S. Kamaluddin¹___________

Henry Rose¹

Erica L. Summers¹

HOUSTON, TEXAS

Randolph L. Jones, Jr.

Jerry D. Redmond, Jr.

DALLAS, TEXAS

Kevin H. Good¹

JACKSON, WYOMING

Randolph L. Jones, Jr.

SANTA FE, NEW MEXICO

Douglas M. Rather

_____________

Benjamin C. Conner

1879-1963

John M. Winters, Jr.

1901-1989

¹Not Admitted in Oklahoma

²Not Admitted in Arkansas

Perma-Fix Environmental Services, Inc.

8302 Dunwoody Place, Ste. 250

Re:

Perma-Fix Environmental Services, Inc.; Form S-8 Registration Statement

First Amendment to 2003 Outside Directors Stock Plan; Our File No. 7034.1

We are delivering this opinion to you in connection with the preparation and filing with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Act”), of the Registration Statement on Form S-8 (the “Registra-tion Statement”) of Perma-Fix Environmental Services, Inc., a Delaware corporation (the “Company”), for the registration of (a) an additional 1,000,000 shares of the Company’s Common Stock, $.001 par value (the “Common Stock”), issuable by the Company pursuant to the Company’s 2003 Outside Directors Stock Plan, as amended by the First Amendment to 2003 Outside Directors Stock Plan, dated August 5, 2008 (the “First Amendment”) (collectively, the “Directors Plan”). As amended, the Directors Plan authorizes the issuance of 2,000,000 shares of Common Stock. The initial 1,000,000 shares authorized for issuance under the Directors Plan are registered under the Form S-8 Registration Statement, No. 333-110995, filed with the Commission on December 5, 2003. This opinion relates only to the additional 1,000,000 shares of Common Stock authorized for issuance pursuant to the First Amendment to the Directors Plan.

In connection with this opinion, the undersigned has examined and relied upon such corporate records, certificates, other documents and questions of law, as we have considered

Perma-Fix Environmental Services, Inc.

August 19, 2008

Page 2

necessary or appropriate for the purposes of this opinion, including, but not limited to, the following:

(a)

the Company’s Restated Certificate of Incorporation, as amended;

(b)

the Company’s Bylaws;

(c)

the Directors Plan;

(d)

Resolutions of the Board of Directors of the Company, dated August 5, 2008;

(e)

Certificate of Good Standing of the State of Delaware, dated August 19, 2008, as to the good standing of the Company; and

(f)

the Registration Statement.

In our examination, we have assumed the genuineness of all signatures, the legal capacity of all persons, the authenticity of all documents submitted as originals, the conformity with the original documents of all documents submitted as certified or photostatic copies, and the authenticity of the originals of such copies. We have further assumed that each recipient of shares of the Company’s Common Stock under the Directors Plan is eligible to participate in the Directors Plan and that any shares of the Company’s Common Stock to be issued pursuant to the Directors Plan will have been registered in accordance with the Act, absent the application of an exemption from registration, prior to the issuance of such shares.

In reliance upon, and based on, such examination and review, we are of the opinion that the 1,000,000 shares of Common Stock issuable pursuant to the Directors Plan, as amended by the First Amendment, will constitute, when issued pursuant to the terms of such Directors Plan, duly authorized, validly issued, fully paid and nonassessable shares of Common Stock of the Company.

We hereby consent to the filing of this opinion as Exhibit 5 to said Registration Statement.

/s/ Conner & Winters, LLP

CONNER & WINTERS, LLP