SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                             --------------------

                                 AMENDMENT NO. 4
                                       TO
                                 SCHEDULE 13E-3
                                (Final Amendment)

                        RULE 13E-3 TRANSACTION STATEMENT
       (PURSUANT TO SECTION 13(e) OF THE SECURITIES EXCHANGE ACT OF 1934)

                          The Randers Killam Group Inc.
                                (Name of Issuer)

                          The Randers Killam Group Inc.
                              Thermo TerraTech Inc.
                           Thermo Electron Corporation
                      (Name of Person(s) Filing Statement)

                   Common Stock, par value $.0001 per share
                         (Title of Class of Securities)

                                 752333 20 3
                      (CUSIP Number of Class of Securities)

                          Sandra L. Lambert, Secretary
                          The Randers Killam Group Inc.
                         c/o Thermo Electron Corporation
                                 81 Wyman Street
                                  P.O. Box 9046
                        Waltham, Massachusetts 02454-9046
                                 (781) 622-1000
 (Name, Address and Telephone Number of Person Authorized to Receive Notices
         and Communications on Behalf of Person(s) Filing Statement)

                                 with a copy to:
                       Seth H. Hoogasian, General Counsel
                          The Randers Killam Group Inc.
                         c/o Thermo Electron Corporation
                                 81 Wyman Street
                                  P.O. Box 9046
                        Waltham, Massachusetts 02454-9046
                                 (781) 622-1000


This statement is filed in connection with (check the appropriate box):

a.    /X/ The  filing of  solicitation  materials  or an  information  statement
      subject to Regulation  14A,  Regulation  14C, or Rule  13e-3(c)  under the
      Securities Exchange Act of 1934.
b.    The filing of a registration statement under the Securities Act of 1933.

c.    A tender offer.

d.    None of the above.

Check the following box if the soliciting materials or information statement
referred to in checking box (a) are preliminary copies.    / /





      This  Amendment  No. 4 to Rule 13e-3  Transaction  Statement  (the  "Final
Amendment")  amends and  supplements  the Rule 13e-3  Transaction  Statement  on
Schedule  13E-3  filed  with  the  Securities  and  Exchange   Commission   (the
"Commission")  by  The  Randers  Killam  Group  Inc.  ("Randers  Killam"  or the
"Company"),   Thermo  TerraTech  Inc.  ("Thermo   TerraTech"),   RK  Acquisition
Corporation  (the  "Merger  Sub"),  and  Thermo  Electron  Corporation  ("Thermo
Electron") on November 9, 1999, as amended and  supplemented  by Amendment No. 1
thereto filed on January 18, 2000, by Amendment No. 2 thereto filed on March 10,
2000,  and by  Amendment  No. 3 thereto  filed on April 13, 2000 (as amended and
restated, the "Statement"),  in connection with a proposal to adopt an Agreement
and Plan of Merger dated as of October 19, 1999 (the "Merger  Agreement") by and
among Thermo Electron, the Merger Sub and Randers Killam,  pursuant to which the
Merger  Sub,  a  subsidiary  of Thermo  Electron,  will be merged  with and into
Randers Killam.

      This Final  Amendment is being  filed,  pursuant to Rule  13e-3(d)(3),  to
report the results of the  transaction  that is the  subject of this  Statement.
Capitalized  terms used herein not  otherwise  defined  shall have the  meanings
ascribed to such terms in this Statement.  Except as expressly set forth in this
Final Amendment, all information in this Statement remains unchanged.

ITEM 3. PAST CONTACTS, TRANSACTIONS OR NEGOTIATIONS.

The  information  set forth in Item 3 of the  Statement  is hereby  amended  and
supplemented as follows:  At a Special Meeting of the  stockholders  held on May
15,  2000,  the  stockholders  of  Randers  Killam  voted  to adopt  the  Merger
Agreement.  The Merger  Agreement  was  approved by holders of a majority of the
Company's  outstanding  shares of common  stock  entitled to vote at the Special
Meeting,  as required by Delaware  law.  The  transactions  with  respect to the
Merger described in this Statement were consummated on May 15, 2000. The Company
filed a  Certificate  of  Merger  with the  Secretary  of State of the  State of
Delaware on May 15, 2000 and, as a result,  the Merger  became  effective  as of
2:00 p.m. (the  "Effective  Time") on that date.  The separate  existence of the
Merger Sub ceased as of the  Effective  Time.  Each share of common stock of the
Company that was issued and outstanding  immediately prior to the Effective Time
(other than shares held by Thermo TerraTech and Thermo Electron and stockholders
exercising  dissenters'  rights) was converted as of the Effective Time into the
right to receive $4.50 per share in cash without  interest,  in accordance  with
the Merger Agreement.

ITEM 5. PLANS OR PROPOSALS OF THE ISSUER OR AFFILIATE.

The  information  set forth in Item 5 of the  Statement  is hereby  amended  and
supplemented as follows: The Merger was consummated on May 15, 2000. Because the
Company, as a result of the Merger, has only one stockholder,  the Company filed
on May 16,  2000 a  certification  on Form 15  pursuant to Rule 12g-4 to provide
notice of  termination  of the  registration  of the common stock of the Company
under the  Securities  Exchange  Act of 1934,  as  amended,  and to suspend  all
reporting requirements thereunder.

ITEM 10. INTEREST IN SECURITIES OF THE ISSUER.

The  information  set forth in Item 10 of the  Statement  is hereby  amended and
supplemented  as  follows:  As a  result  of the  Merger  and  the  transactions
consummated  in  connection   therewith,   Thermo  Electron  owns  100%  of  the
outstanding capital stock of the Company (as the Surviving Corporation).







SIGNATURES

      After due inquiry and to the best of his knowledge and belief, each of the
undersigned  certifies that the information set forth in this Statement is true,
complete and correct.

                                   THERMO TERRATECH INC.



Dated:  May 19, 2000               By:  /s/ Kenneth J. Apicerno
                                        -----------------------
                                   Name:    Kenneth J. Apicerno
                                   Title:   Treasurer

                                   THE RANDERS KILLAM GROUP INC.



Dated:  May 19, 2000               By:  /s/ Emil C. Herkert
                                        -------------------
                                   Name:     Emil C. Herkert
                                   Title:    President and Chief Executive
                                             Officer

                                   THERMO ELECTRON CORPORATION



Dated: May 19, 2000                By:  /s/ Theo Melas-Kyriazi
                                        ----------------------
                                   Name:     Theo Melas-Kyriazi
                                   Title:    Vice President and Chief Financial
                                             Officer