SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934
(Amendment No. One)*

CLEAN HARBORS, INC.
--------------------------------------------------------
(Name of Issuer)

COMMON STOCK, $.01 PAR VALUE
--------------------------------------------------------
(Title of Class of Securities)

184496107
--------------------------------------------------------
(CUSIP Number)

ROBERT W. EDLER, THEIDMANN & EDLER
30 SOUTH WACKER DRIVE, CHICAGO, IL. 60606
(312)831-4440
--------------------------------------------------------
(Name, Address and Telephone Number of Person Authorized
to Receive Notices and Communications)

JULY 25, 2000
--------------------------------------------------------
(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) or (4),  check the following
box / /.

*The remainder of  this cover  page  shall  be  filled  out  for a reporting
person's  initial  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).

(Continued on following page(s))

Page 1 of  4  Pages
---

CUSIP No. 184496107                   13D                 Page  2  of  4  Pages
---------                                            ---    --- 

-------------------------------------------------------------------------------
(1) Names of Reporting Persons.  S.S. or I.R.S. Identification Nos. of Above
Persons

JOSEPH CHALHOUB
-------------------------------------------------------------------------------
(2) Check the Appropriate Box if a Member     (a)  / /   I AM NOT A
of a Group*                               (b)  /X/   MEMBER OF A GROUP.
-------------------------------------------------------------------------------
(3) SEC Use Only

-------------------------------------------------------------------------------
(4) Source of Funds*
NOT APPLICABLE -- NO PURCHASES MADE
-------------------------------------------------------------------------------
(5) Check if Disclosure of Legal Proceedings is Required Pursuant to
Items 2(d) or 2(e)
-------------------------------------------------------------------------------
(6) Citizenship or Place of Organization
CANADIAN
-------------------------------------------------------------------------------
Number of Shares              (7) Sole Voting
Beneficially Owned                 Power                402,100
by Each Reporting           --------------------------------------------------
Person With                  (8) Shared Voting
Power                  NONE
--------------------------------------------------
(9) Sole Dispositive
Power                402,100
--------------------------------------------------
(10) Shared Dispositive
Power                  NONE
-------------------------------------------------------------------------------
(11) Aggregate Amount Beneficially Owned by Each Reporting Person
402,100
-------------------------------------------------------------------------------
(12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares*

-------------------------------------------------------------------------------
(13) Percent of Class Represented by Amount in Row (11)
3.6%
-------------------------------------------------------------------------------
(14) Type of Reporting Person*
IN
-------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!

Page  3  of  4  Pages
---    --- 

ITEM 1.  SECURITY AND ISSUER
COMMON STOCK, $0.01 par value per share
CLEAN HARBORS, INC.
1501 Washington Street
Braintree, Massachusetts 02184

ITEM 2.  IDENTITY AND BACKGROUND
(a) JOSEPH CHALHOUB; (b) 101 UPPER BELLEVUE, WESTMOUNT, QUEBEC H3Y 1B7 
CANADA; (c) PRESIDENT AND CHIEF EXECUTIVE OFFICER, HERITAGE-CRYSTAL 
CLEAN, LLC, 2250 POINT BLVD., SUITE 250, ELGIN, IL 60123; (d) Mr. 
Chalhoub has not been convicted during the past five years in a 
criminal proceeding (excluding traffic violations or similar 
misdemeanors). (e) Mr. Chalhoub has not during the last five years 
been a party to civil proceedings of a judicial or administrative 
body of competent jurisdiction and as a result of which proceeding 
was or is subject to a judgment, decree or final order enjoining 
future violations of, or prohibiting or mandating activities subject 
to, federal or state securities laws. (f) Mr. Chalhoub is a citizen 
of Canada.

ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION
NOT APPLICABLE -- NO PURCHASES MADE

ITEM 4.  PURPOSE OF TRANSACTION
TO RECOGNIZE GAIN

ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER
(a) Shares beneficially owned: 402,100 (3.6%). Percentage is based 
upon the number of shares of common stock outstanding as of August 
3, 2000 (11,142,928), as contained in the issuer's Form 10-Q for the 
quarter ended June 30, 2000, the most recent filing by the issuer 
with the Commission.
(b) Number of shares as to which Mr. Chalhoub has:
(i) sole power to vote or direct the vote: 402,100;
(ii) shared power to vote or direct the vote: none;
(iii) sole power to dispose or direct the disposition of: 402,100;
(iv) shared power to dispose or direct the disposition of: none.
(c) Sales by Joseph Chalhoub:

Date                No. of Shares            Prices per Share         Where/How Effected
----                -------------            ----------------         ------------------

7-25-2000           50,000                   2.3759
7-25-2000           25,000                   2.7500
7-26-2000           43,500                   2.9642
7-27-2000              500                   3.0625
7-27-2000            6,000                   3.0000
7-27-2000            1,000                   3.1250                   Sold through
7-28-2000              200                   3.0000                   William Blair
7-28-2000            5,000                   3.0000                   & Company in
7-31-2000              500                   3.0000                   ordinary brokerage
8-7-2000             1,500                   2.9375                   transactions
8-8-2000            15,400                   2.9375
8-9-2000             9,100                   2.9375
8-9-2000             2,900                   3.0000

(d) Inapplicable.
(e) Mr. Chalhoub ceased to be the beneficial owner of more than 5% of 
the common stock on July 25, 2000.

ITEM 6.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
TO SECURITIES OF THE ISSUER.

Inapplicable

ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS

Inapplicable

Page  4  of  4  Pages
---    --- 

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.

AUGUST 21, 2000
----------------------------------------
(Date

/s/ Joseph Chalhoub
----------------------------------------
(Signature)

JOSEPH CHALHOUB
----------------------------------------
(Name/Title)