<PAGE>
 
================================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                 ____________

                                   FORM S-8

            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                                 ____________

                              CLEAN HARBORS, INC.
            (Exact name of registrant as specified in its charter)

          MASSACHUSETTS                                04-2997780
(State or other jurisdiction of          (I.R.S. employer identification number)
incorporation or organization)

325 WOOD ROAD, BRAINTREE, MASSACHUSETTS                   02184
(Address of principal executive offices)                (Zip Code)

                  CLEAN HARBORS EMPLOYEE STOCK PURCHASE PLAN
                           (Full title of the plan)

                             C. MICHAEL MALM, ESQ.
                        DAVIS, MALM & D'AGOSTINE, P.C.
                 ONE BOSTON PLACE, BOSTON, MASSACHUSETTS 02108
                                (617) 367-2500
                    (Name and address of agent for service)

                                 ____________

                        CALCULATION OF REGISTRATION FEE

<TABLE> 
<CAPTION> 
- --------------------------------------------------------------------------------
                                   Proposed          Proposed
Title of                           maximum           maximum
securities          Amount         offering          aggregate     Amount of
to be               to be          price             offering      registration
registered          registered     per share (1)     price (1)     fee (1)
================================================================================
<S>                 <C>            <C>               <C>           <C> 
Common Stock,
$. 01 par value     1,000,000      $4.875            $4,875,000    $1,681.04
</TABLE> 

================================================================================
(1) Computed under Rule 457(c) and (h) based upon the last reported sale price
of the registrant's Common Stock on The Nasdaq Stock Market on June 8, 1995.

Approximate date of proposed public offering:  From time to time after the
effective date of this Registration Statement.
================================================================================
<PAGE>
 
                                    PART I

This registration statement has been prepared in accordance with the
requirements of Form S-8 and relates to 1,000,000 shares of common stock, $. 01
par value per share ("Common Stock") of Clean Harbors, Inc. (the "Company").
Such number of shares represents the number of shares available for issuance
under the Company's Employee Stock Purchase Plan, as approved respectively by
the Company's Board of Directors and stockholders on March 3, 1995 and May 12,
1995.  Documents containing the information specified in Part I will be sent or
given to employees as specified in Rule 428(b)(1).


                                    PART II

Item 3. Incorporation of Documents By Reference

The following documents filed by the Company with the Commission are
incorporated in and made a part of this registration statement and the
Prospectus by reference as of their respective dates:

(1) the Company's Annual Report on Form 10-K for the Fiscal Year Ended December
31, 1994 (File No. 0-16379);

(2) the Company's Quarterly Report on Form 10-Q for the Quarterly Period Ended
March 31, 1995; and

(3) the description of the Company's Common Stock contained under the caption
"Description of Capital Stock" in the Company's Registration Statement on Form
S-1 under the Securities Act (No. 33-17565), as referred to in the Company's
Registration Statement on Form 8-A under the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), filed with the Commission on November 18, 1987.

In addition to the foregoing documents, all documents subsequently filed by the
Company with the Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the
Exchange Act, prior to the filing of a post-effective amendment which indicates
that all securities offered have been sold or which deregisters all securities
then remaining unsold, shall be deemed to be incorporated by reference and to be
a part hereof from the date of filing of such documents.

Item 4. Description of Securities

Not Applicable

Item 5. Interest of Named Experts and Counsel

C. Michael Malm, a shareholder of Davis, Malm & D'Agostine, P.C., is the Clerk
of the Company and the holder of an option to purchase 11,112 shares of the
Company's Common Stock at $2.70 per share.  Mr. Malm and other shareholders in
Davis, Malm & D'Agostine, P.C., beneficially owned an aggregate of 13,760
additional shares of Common Stock of the Company as of June 1, 1995.  In
addition, two shareholders of that firm are trustees of a trust for the benefit
of the children of Alan S. McKim, the Company's principal stockholder, which
owns an additional 60,000 shares of Common Stock.
<PAGE>
 
Item 6. Indemnification of Directors and Officers

Section 67 of the Massachusetts Business Corporation Law, as amended, gives
Massachusetts corporations the power to indemnify each of their present and
former officers or directors under certain circumstances if such person acted in
good faith and in a manner which such person reasonably believed to be in or not
opposed to the best interest of the corporation.

Articles 5 and 6 of the Company's Restated Articles of Organization contain the
following provisions regarding the indemnification of directors and officers:

"FIVE: The Corporation shall, to the extent legally permissible, indemnify each
person (and his heirs, executors, administrators, or other legal
representatives) who is, or shall have been, a director or officer of the
Corporation or any person who is serving, or shall have served, at the request
of the Corporation as a director or officer of another corporation, against all
liabilities and expenses (including judgments, fines, penalties and attorneys'
fees and all amounts paid in compromise or settlement) reasonably incurred by
any such director, officer or person in connection with, or arising out of, any
action, suit or proceeding in which any such director, officer or person may be
a party defendant or with which he may be threatened or otherwise involved,
directly or indirectly, by reason of his being or having been a director or
officer of the Corporation or such other corporation, except in relation to
matters as to which any such director, officer or person shall be finally
adjudged, other than by consent, in such action, suit or proceeding not to have
acted in good faith in the reasonable belief that his action was in the best
interests of the corporation; provided, however, that indemnity shall not be
made with respect to such amounts paid in compromise or settlement, unless:

(a) such compromise or settlement shall have been approved as in the best
interest of the Corporation, after notice that it involves such indemnification
by:

(i) The Board of Directors by a majority of a quorum consisting of directors who
were not parties to such action, suit or proceedings, or by

(ii) The stockholders of the Corporation by a majority vote of a quorum
consisting of stockholders who were not parties to such action, suit or
proceeding, or

(b) in the absence of action by disinterested directors or stockholders as above
provided, there has been obtained at the request of a majority of the Board of
Directors then in office a written opinion of independent legal counsel to the
effect that the director or officer to be indemnified appears to have acted in
good faith in the reasonable belief that his action was in the best interest of
the Corporation.

Upon request therefor by any director, officer or person enumerated in the
preceding paragraph of this Article, the Corporation may from time to time, if
authorized by the Board of Directors, prior to final adjudication or compromise
or settlement of the matter or matters as to which indemnification is claimed,
advance to such director, officer or person all expenses incurred by him to date
of such request.  Any advance made pursuant to this provision shall be made on
the condition that the director, officer or person receiving such advance shall
<PAGE>
 
repay to the Corporation any amounts so advanced if, upon the termination of the
matter or matters as to which such advances were made, such director, officer or
person shall not be entitled to indemnification under the preceding paragraph of
this Article.

The foregoing right to indemnification shall not be exclusive of any other
rights to which any such director, officer or person is entitled under any
agreement, vote of stockholders, statute, or as a matter of law, or otherwise.

The provisions of this Article are separable, and if any provision or portion
hereof shall for any reason be held inapplicable, illegal or ineffective, this
shall not prevent any other provision or portion hereof from applying, and shall
not affect any right of indemnification existing otherwise than under this
Article.

SIX: No director shall be personally liable to the Corporation or its
stockholders for monetary damages for breach of fiduciary duty as a director
notwithstanding any provision of law imposing such liability; provided, however,
that such limitation on liability will not eliminate or limit the liability of a
director (i) for any breach of the director's duty of loyalty to the Corporation
or its stockholders, (ii) for acts or omissions not in good faith or which
involve intentional misconduct or a knowing violation of law, (iii) under
Sections 61 or 62 of Chapter 156B of the Massachusetts General Laws, or (iv) for
any transaction from which the director derived an improper personal benefit.
If the Massachusetts Business Corporation Law is amended after the effective
date of these Articles of Organization, to authorize corporate action further
eliminating or limiting the personal liability of directors, then the liability
of a director of the Corporation shall be eliminated or limited to the fullest
extent permitted by the Massachusetts Business Corporation Law, as so amended."

Item 7. Exemption from Registration Claimed

Not Applicable

Item 8. Exhibits

The following exhibits are filed as a part of this Registration Statement:

<TABLE> 
<CAPTION> 
Item No.                                Description
- --------                                -----------
<S>        <C>                           
   4       Description of the Company's Common Stock (contained in the Company's
           Restated Articles of Organization filed as Exhibit 3.1 to its
           Registration Statement (No. 33-17565) on Form S-1 and incorporated by
           reference herein).

   5       Opinion of Davis, Malm & D'Agostine, P.C. as to the legality of the
           securities being registered (filed herewith).

  23.1     Consent of Coopers & Lybrand L.L.P. (filed herewith).

  23.2     Consent of Davis, Malm & D'Agostine, P.C. is contained in their
           opinion filed as Exhibit 5.
</TABLE> 
<PAGE>
 
<TABLE> 
  <S>      <C>  
  24       Power of Attorney granting James A. Pitts and C. Michael Malm the
           power to sign and file this Registration Statement and any amendments
           thereto (filed herewith).

  27       Financial Data Schedule (filed as Exhibit 27 to the Company's
           Quarterly Report on Form 10-Q for the Quarterly Period Ended March
           31, 1995 and incorporated by reference herein).
</TABLE> 

Item 9. Undertakings

(a) The undersigned registrant hereby undertakes:

       (1) To file, during any period in which offers or sales are being made, a
           post-effective amendment to this Registration Statement:

           (i) To include any prospectus required by Section 10(a)(3) of the
           Securities Act of 1933;

           (ii) To reflect in the prospectus any facts or events arising after
           the effective date of the Registration Statement (or the most recent
           post-effective amendment thereof) which, individually or in the
           aggregate, represent a fundamental change in the information set
           forth in the Registration Statement;

           (iii) To include any material information with respect to the plan of
           distribution not previously disclosed in the Registration Statement
           or any material change to such information in the Registration
           Statement;

           Provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not
           apply if the information required to be included in a post-effective
           amendment by those paragraphs is contained in periodic reports filed
           by the registrant pursuant to Section 13 or Section 15(d) of the
           Securities Exchange Act of 1934 that are incorporated by reference in
           the Registration Statement.

       (2) That, for the purpose of determining any liability under the
           Securities Act of 1933, each such post-effective amendment shall be
           deemed to be a new registration statement relating to the securities
           offered therein, and the offering of such securities at that time
           shall be deemed to be the initial bona fide offering thereof.

       (3) To remove from registration by means of post-effective amendment any
           of the securities being registered which remain unsold at the
           termination of the offering.

(b) The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Securities Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to Section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
Registration Statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
<PAGE>
 
at that time shall be deemed to be the initial bona fide offering thereof.

(c) Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable.  In the event that a claim for indemnification against
such liabilities (other than the payment by the registrant of expenses incurred
or paid by a director, officer or controlling person of the registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.


                                  SIGNATURES


Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunder duly
authorized, in the Town of Braintree, Commonwealth of Massachusetts, on the 12th
day of June, 1995.


                                  CLEAN HARBORS, INC.


                                  By /s/ James A. Pitts
                                     ------------------
                                     James A. Pitts, Executive Vice President
                                     of Finance and Administration
                                     and Chief Financial Officer
<PAGE>
 
Pursuant to the requirements of the Securities Act of 1933, as amended, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.

<TABLE> 
<CAPTION> 
       Signature                   Title                     Date
       ---------                   -----                     ----
<S>                        <C>                           <C> 
       *                   Chairman of the Board of      June 12, 1995
- ------------------------   Directors, President and
Alan S. McKim              Chief Executive Officer


/s/ James A. Pitts         Executive Vice President      June 12, 1995
- ------------------------   of Finance and Administration
James A. Pitts             and Chief Financial Officer
                           (principal financial and
                            accounting officer)

       *                   Director                      June 12, 1995
- ------------------------
Christy W. Bell

       *                   Director                      June 12, 1995
- ------------------------
John F. Kaslow

       *                   Director                      June 12, 1995
- ------------------------
Daniel J. McCarthy

       *                   Director                      June 12, 1995
- ------------------------
John T. Preston

       *                   Director                      June 12, 1995
- ------------------------
Lorne R. Waxlax


*By: /s/ James A. Pitts
    ------------------------
         James A. Pitts
        Attorney-In-Fact
</TABLE>
[{"type": "S-8", "sequence": "1", "description": "FORM S-8", "secsgml_size_bytes": 17927}]
{"company-data": {"conformed-name": "CLEAN HARBORS INC", "cik": "0000822818", "assigned-sic": "4953", "irs-number": "042997780", "state-of-incorporation": "MA", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "033-60187", "film-number": "95546643"}, "business-address": {"street1": "1200 CROWN COLONY DR", "city": "QUINCY", "state": "MA", "zip": "02169", "phone": "6178491800"}, "mail-address": {"street1": "1200 CROWN COLONY DR", "city": "QUINCY", "state": "MA", "zip": "02169"}}
================================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                 ____________

                                   FORM S-8

            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                                 ____________

                              CLEAN HARBORS, INC.
            (Exact name of registrant as specified in its charter)

          MASSACHUSETTS                                04-2997780
(State or other jurisdiction of          (I.R.S. employer identification number)
incorporation or organization)

325 WOOD ROAD, BRAINTREE, MASSACHUSETTS                   02184
(Address of principal executive offices)                (Zip Code)

                  CLEAN HARBORS EMPLOYEE STOCK PURCHASE PLAN
                           (Full title of the plan)

                             C. MICHAEL MALM, ESQ.
                        DAVIS, MALM & D'AGOSTINE, P.C.
                 ONE BOSTON PLACE, BOSTON, MASSACHUSETTS 02108
                                (617) 367-2500
                    (Name and address of agent for service)

                                 ____________

                        CALCULATION OF REGISTRATION FEE
- --------------------------------------------------------------------------------
                                   Proposed          Proposed
Title of                           maximum           maximum
securities          Amount         offering          aggregate     Amount of
to be               to be          price             offering      registration
registered          registered     per share (1)     price (1)     fee (1)
================================================================================
Common Stock,
$. 01 par value     1,000,000      $4.875            $4,875,000    $1,681.04
================================================================================
(1) Computed under Rule 457(c) and (h) based upon the last reported sale price
of the registrant's Common Stock on The Nasdaq Stock Market on June 8, 1995.

Approximate date of proposed public offering:  From time to time after the
effective date of this Registration Statement.
================================================================================
PART I

This registration statement has been prepared in accordance with the
requirements of Form S-8 and relates to 1,000,000 shares of common stock, $. 01
par value per share ("Common Stock") of Clean Harbors, Inc. (the "Company").
Such number of shares represents the number of shares available for issuance
under the Company's Employee Stock Purchase Plan, as approved respectively by
the Company's Board of Directors and stockholders on March 3, 1995 and May 12,
1995.  Documents containing the information specified in Part I will be sent or
given to employees as specified in Rule 428(b)(1).

                                    PART II

Item 3. Incorporation of Documents By Reference

The following documents filed by the Company with the Commission are
incorporated in and made a part of this registration statement and the
Prospectus by reference as of their respective dates:

(1) the Company's Annual Report on Form 10-K for the Fiscal Year Ended December
31, 1994 (File No. 0-16379);

(2) the Company's Quarterly Report on Form 10-Q for the Quarterly Period Ended
March 31, 1995; and

(3) the description of the Company's Common Stock contained under the caption
"Description of Capital Stock" in the Company's Registration Statement on Form
S-1 under the Securities Act (No. 33-17565), as referred to in the Company's
Registration Statement on Form 8-A under the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), filed with the Commission on November 18, 1987.

In addition to the foregoing documents, all documents subsequently filed by the
Company with the Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the
Exchange Act, prior to the filing of a post-effective amendment which indicates
that all securities offered have been sold or which deregisters all securities
then remaining unsold, shall be deemed to be incorporated by reference and to be
a part hereof from the date of filing of such documents.

Item 4. Description of Securities

Not Applicable

Item 5. Interest of Named Experts and Counsel

C. Michael Malm, a shareholder of Davis, Malm & D'Agostine, P.C., is the Clerk
of the Company and the holder of an option to purchase 11,112 shares of the
Company's Common Stock at $2.70 per share.  Mr. Malm and other shareholders in
Davis, Malm & D'Agostine, P.C., beneficially owned an aggregate of 13,760
additional shares of Common Stock of the Company as of June 1, 1995.  In
addition, two shareholders of that firm are trustees of a trust for the benefit
of the children of Alan S. McKim, the Company's principal stockholder, which
owns an additional 60,000 shares of Common Stock.
Item 6. Indemnification of Directors and Officers

Section 67 of the Massachusetts Business Corporation Law, as amended, gives
Massachusetts corporations the power to indemnify each of their present and
former officers or directors under certain circumstances if such person acted in
good faith and in a manner which such person reasonably believed to be in or not
opposed to the best interest of the corporation.

Articles 5 and 6 of the Company's Restated Articles of Organization contain the
following provisions regarding the indemnification of directors and officers:

"FIVE: The Corporation shall, to the extent legally permissible, indemnify each
person (and his heirs, executors, administrators, or other legal
representatives) who is, or shall have been, a director or officer of the
Corporation or any person who is serving, or shall have served, at the request
of the Corporation as a director or officer of another corporation, against all
liabilities and expenses (including judgments, fines, penalties and attorneys'
fees and all amounts paid in compromise or settlement) reasonably incurred by
any such director, officer or person in connection with, or arising out of, any
action, suit or proceeding in which any such director, officer or person may be
a party defendant or with which he may be threatened or otherwise involved,
directly or indirectly, by reason of his being or having been a director or
officer of the Corporation or such other corporation, except in relation to
matters as to which any such director, officer or person shall be finally
adjudged, other than by consent, in such action, suit or proceeding not to have
acted in good faith in the reasonable belief that his action was in the best
interests of the corporation; provided, however, that indemnity shall not be
made with respect to such amounts paid in compromise or settlement, unless:

(a) such compromise or settlement shall have been approved as in the best
interest of the Corporation, after notice that it involves such indemnification
by:

(i) The Board of Directors by a majority of a quorum consisting of directors who
were not parties to such action, suit or proceedings, or by

(ii) The stockholders of the Corporation by a majority vote of a quorum
consisting of stockholders who were not parties to such action, suit or
proceeding, or

(b) in the absence of action by disinterested directors or stockholders as above
provided, there has been obtained at the request of a majority of the Board of
Directors then in office a written opinion of independent legal counsel to the
effect that the director or officer to be indemnified appears to have acted in
good faith in the reasonable belief that his action was in the best interest of
the Corporation.

Upon request therefor by any director, officer or person enumerated in the
preceding paragraph of this Article, the Corporation may from time to time, if
authorized by the Board of Directors, prior to final adjudication or compromise
or settlement of the matter or matters as to which indemnification is claimed,
advance to such director, officer or person all expenses incurred by him to date
of such request.  Any advance made pursuant to this provision shall be made on
the condition that the director, officer or person receiving such advance shall
repay to the Corporation any amounts so advanced if, upon the termination of the
matter or matters as to which such advances were made, such director, officer or
person shall not be entitled to indemnification under the preceding paragraph of
this Article.

The foregoing right to indemnification shall not be exclusive of any other
rights to which any such director, officer or person is entitled under any
agreement, vote of stockholders, statute, or as a matter of law, or otherwise.

The provisions of this Article are separable, and if any provision or portion
hereof shall for any reason be held inapplicable, illegal or ineffective, this
shall not prevent any other provision or portion hereof from applying, and shall
not affect any right of indemnification existing otherwise than under this
Article.

SIX: No director shall be personally liable to the Corporation or its
stockholders for monetary damages for breach of fiduciary duty as a director
notwithstanding any provision of law imposing such liability; provided, however,
that such limitation on liability will not eliminate or limit the liability of a
director (i) for any breach of the director's duty of loyalty to the Corporation
or its stockholders, (ii) for acts or omissions not in good faith or which
involve intentional misconduct or a knowing violation of law, (iii) under
Sections 61 or 62 of Chapter 156B of the Massachusetts General Laws, or (iv) for
any transaction from which the director derived an improper personal benefit.
If the Massachusetts Business Corporation Law is amended after the effective
date of these Articles of Organization, to authorize corporate action further
eliminating or limiting the personal liability of directors, then the liability
of a director of the Corporation shall be eliminated or limited to the fullest
extent permitted by the Massachusetts Business Corporation Law, as so amended."

Item 7. Exemption from Registration Claimed

Not Applicable

Item 8. Exhibits

The following exhibits are filed as a part of this Registration Statement:
Item No.                                Description
- --------                                -----------
4       Description of the Company's Common Stock (contained in the Company's
           Restated Articles of Organization filed as Exhibit 3.1 to its
           Registration Statement (No. 33-17565) on Form S-1 and incorporated by
           reference herein).

   5       Opinion of Davis, Malm & D'Agostine, P.C. as to the legality of the
           securities being registered (filed herewith).

  23.1     Consent of Coopers & Lybrand L.L.P. (filed herewith).

  23.2     Consent of Davis, Malm & D'Agostine, P.C. is contained in their
           opinion filed as Exhibit 5.
24       Power of Attorney granting James A. Pitts and C. Michael Malm the
           power to sign and file this Registration Statement and any amendments
           thereto (filed herewith).

  27       Financial Data Schedule (filed as Exhibit 27 to the Company's
           Quarterly Report on Form 10-Q for the Quarterly Period Ended March
           31, 1995 and incorporated by reference herein).
Item 9. Undertakings

(a) The undersigned registrant hereby undertakes:

       (1) To file, during any period in which offers or sales are being made, a
           post-effective amendment to this Registration Statement:

           (i) To include any prospectus required by Section 10(a)(3) of the
           Securities Act of 1933;

           (ii) To reflect in the prospectus any facts or events arising after
           the effective date of the Registration Statement (or the most recent
           post-effective amendment thereof) which, individually or in the
           aggregate, represent a fundamental change in the information set
           forth in the Registration Statement;

           (iii) To include any material information with respect to the plan of
           distribution not previously disclosed in the Registration Statement
           or any material change to such information in the Registration
           Statement;

           Provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not
           apply if the information required to be included in a post-effective
           amendment by those paragraphs is contained in periodic reports filed
           by the registrant pursuant to Section 13 or Section 15(d) of the
           Securities Exchange Act of 1934 that are incorporated by reference in
           the Registration Statement.

       (2) That, for the purpose of determining any liability under the
           Securities Act of 1933, each such post-effective amendment shall be
           deemed to be a new registration statement relating to the securities
           offered therein, and the offering of such securities at that time
           shall be deemed to be the initial bona fide offering thereof.

       (3) To remove from registration by means of post-effective amendment any
           of the securities being registered which remain unsold at the
           termination of the offering.

(b) The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Securities Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to Section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
Registration Statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

(c) Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable.  In the event that a claim for indemnification against
such liabilities (other than the payment by the registrant of expenses incurred
or paid by a director, officer or controlling person of the registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

                                  SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunder duly
authorized, in the Town of Braintree, Commonwealth of Massachusetts, on the 12th
day of June, 1995.

                                  CLEAN HARBORS, INC.

                                  By /s/ James A. Pitts
                                     ------------------
                                     James A. Pitts, Executive Vice President
                                     of Finance and Administration
                                     and Chief Financial Officer
Pursuant to the requirements of the Securities Act of 1933, as amended, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
Signature                   Title                     Date
       ---------                   -----                     ----
*                   Chairman of the Board of      June 12, 1995
- ------------------------   Directors, President and
Alan S. McKim              Chief Executive Officer

/s/ James A. Pitts         Executive Vice President      June 12, 1995
- ------------------------   of Finance and Administration
James A. Pitts             and Chief Financial Officer
                           (principal financial and
                            accounting officer)

       *                   Director                      June 12, 1995
- ------------------------
Christy W. Bell

       *                   Director                      June 12, 1995
- ------------------------
John F. Kaslow

       *                   Director                      June 12, 1995
- ------------------------
Daniel J. McCarthy

       *                   Director                      June 12, 1995
- ------------------------
John T. Preston

       *                   Director                      June 12, 1995
- ------------------------
Lorne R. Waxlax

*By: /s/ James A. Pitts
    ------------------------
         James A. Pitts
        Attorney-In-Fact