UNITED STATES SECURITIES EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 4)* PERMA-FIX ENVIRONMENTAL SERVICES, INC. (Name of Issuer) Common Stock $0.001 par value (Title of Class of Securities) 74157104 (CUSIP Number) R.S. Thorn, American Ecology Corporation, 805 W. Idaho Street, Suite 200 Boise, ID 83702 (208) 331-8400 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) June 25, 1997 (Date of Event which Requires Filing of this Statement) If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of rule 13d-1(b)(3) of (4), check the following box / /. NOTE: Six copies of this statement, including all exhibits, should be filed with the Commission. See Rule 13d-1(a) for other parties to whom copies are to be sent. *The remainder of this cover page shall be filled out for a reporting person's filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). CUSIP No. 74157104 -------- 1. NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON American Ecology Corporation, #95-3889638 -------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / / (b) / / -------------------------------------------------------------------- 3. SEC USE ONLY -------------------------------------------------------------------- 4. SOURCE OF FUNDS* -------------------------------------------------------------------- 5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) / / -------------------------------------------------------------------- 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware --------------------------------------------------------------------- 7. SOLE VOTING POWER 0 NUMBER OF ---------------------------------------------------- SHARES BENEFICIALLY 8. SHARED VOTING POWER OWNED BY EACH 0 REPORTING ---------------------------------------------------- PERSON WITH 9. SOLE DISPOSITIVE POWER 0 ---------------------------------------------------- 10. SHARED DISPOSITIVE POWER 0 ---------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 --------------------------------------------------------------------- 12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* / / --------------------------------------------------------------------- 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0 --------------------------------------------------------------------- 14. TYPE OF REPORTING PERSON* CO --------------------------------------------------------------------- ITEM 1. American Ecology Corporation, a Delaware Corporation ("AEC") has decreased its percentage ownership of Perma-Fix Environmental Services Inc., a Delaware Corporation ("PESI") by selling the remaining 502,500 shares of PESI common stock, par value $.001 per share between June 9, 1997 and June 25, 1997 at prices between 1-15/16 and 2-1/16. ITEM 2. The name, business addresses, and present principal occupations or employments (and the name, principal business and address of any corporation or other organization in which such employment is conducted) of AEC's directors and executive officers are set forth below. If no address is given, the directors or officers address is American Ecology Corporation, 805 W. Idaho Street, Suite 200, Boise, Idaho 83702. All directors and officers are citizens of the United States of America. Directors (including executive officers who are directors) ---------------------------------------------------------- Jack K. Lemley Chairman & Chief Executive Officer American Ecology Corporation Paul F. Schutt Chief Executive Officer Nuclear Fuel Services, Inc. Rotchford Barker Independent Businessman Keith Bronstein President Tradelink LLC Patricia M. Eckert Owner Patricia M. Eckert & Associates Jerry J. Scoville President J.J. Scoville & Associates, Inc. Edward F. Heil Chairman of the Board American Environmental Construction Co. Paul Bergson Principal Bergson & Co. Executive Officers (who are not directors) ------------------------------------------ R.S. Thorn Chief Accounting Officer Richard F. Paton Vice-President Joseph J. Nagel Vice-President Ian P.F. Dorling Treasurer ITEM 5. AEC has made several sales of Perma-Fix Environmental Services, Inc. ("PESI") common stock between June 9, 1997 and June 25, 1997. At June 9, 1997 AEC owned 502,500 shares of common stock of PESI (4.98%). Upon completion of the June 25, 1997 sale, AEC owned 0 shares of PESI common stock (0.00%). AEC sales of PESI common stock in the open market on the NASDAQ exchange were:
DATE SHARES PRICE PROCEEDS ---- ------ ----- -------- 6/2/97 46,500 1-15/16 $ 90,090.73 6/2/97 25,000 2-1/32 50,779.44 6/3/97 43,500 1-15/16 84,278.42 6/3/97 5,000 2 9,999.66 6/4/97 25,000 2 49,998.33 6/5/97 61,000 2 121,995.91 6/6/97 11,000 2 21,999.25 6/9/97 42,500 2-1/16 87,653.32 6/9/97 33,000 2 65,997.78 6/12/97 2,500 2-1/16 5,156.07 6/23/97 100,000 2 199,993.32 6/23/97 60,000 2-1/16 123,745.87 6/23/97 40,000 2-1/8 84,997.16 6/24/97 50,000 2-1/8 106,246.45 6/25/97 100,000 2-3/16 218,742.69 6/25/97 125,000 2-1/4 281,240.62 6/25/97 25,000 2-9/32 57,029.34 ------- ------------- TOTALS 795,000 $1,659,944.36
Signature After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. DATED: June 30, 1997 AMERICAN ECOLOGY CORPORATION By: \s\ Jack K. Lemley -------------------------------------- Jack K. Lemley Chairman & Chief Executive Officer By: \s\ R.S. Thorn -------------------------------------- R.S. Thorn Chief Accounting Officer