0001104659-12-081014.txt : 20121130 0001104659-12-081014.hdr.sgml : 20121130 20121130085237 ACCESSION NUMBER: 0001104659-12-081014 CONFORMED SUBMISSION TYPE: 8-K PUBLIC DOCUMENT COUNT: 4 CONFORMED PERIOD OF REPORT: 20121127 ITEM INFORMATION: Entry into a Material Definitive Agreement ITEM INFORMATION: Financial Statements and Exhibits FILED AS OF DATE: 20121130 DATE AS OF CHANGE: 20121130 FILER: COMPANY DATA: COMPANY CONFORMED NAME: CLEAN HARBORS INC CENTRAL INDEX KEY: 0000822818 STANDARD INDUSTRIAL CLASSIFICATION: HAZARDOUS WASTE MANAGEMENT [4955] IRS NUMBER: 042997780 STATE OF INCORPORATION: MA FISCAL YEAR END: 1211 FILING VALUES: FORM TYPE: 8-K SEC ACT: 1934 Act SEC FILE NUMBER: 001-34223 FILM NUMBER: 121233234 BUSINESS ADDRESS: STREET 1: 42 LONGWATER DRIVE STREET 2: P.O. BOX 9149 CITY: NORWELL STATE: MA ZIP: 02061-9149 BUSINESS PHONE: 781-792-5000 MAIL ADDRESS: STREET 1: 42 LONGWATER DRIVE CITY: NORWELL STATE: MA ZIP: 02061-9149 8-K 1 a12-27731_38k.htm 8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 27, 2012

CLEAN HARBORS, INC.

(Exact name of registrant as specified in its charter)

Massachusetts		001-34223		04-2997780
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

42 Longwater Drive, Norwell, Massachusetts		02061-9149
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code (781) 792-5000

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 1.01. Entry into a Material Definitive Agreement.

Underwriting Agreement

On November 27, 2012, Clean Harbors, Inc. (the “Company”) entered into an Underwriting Agreement with Goldman, Sachs & Co., as representative of the several underwriters named in Schedule I thereto (collectively, the “Underwriters”), pursuant to which the Company agreed to sell, and the Underwriters agreed to purchase, subject to and upon terms and conditions set forth therein, 6,000,000 shares (the “Firm Securities”) of the Company’s common stock, par value $.01 (“Stock”). The initial offering price to the public is $56.00 per share. The issuance and sale of the Firm Shares is expected to close on December 3, 2012.

Pursuant to the Underwriting Agreement, the Underwriters also have a 30-day option to purchase up to an additional 900,000 shares (the “Optional Securities”) of Stock. The Underwriting Agreement defines the 6,000,000 Firm Shares and the up to 900,000 Optional Shares collectively as the “Securities.”

The Underwriting Agreement includes customary representations, warranties and covenants by the Company. It also provides for customary indemnification by each of the Company and the Underwriters against certain liabilities arising out of or in connection with the sale of the Securities and customary contribution provisions in respect of those liabilities. The description of the Underwriting Agreement contained in this report does not purport to be complete and is qualified in its entirety by reference to the complete text of such agreement, a copy of which is filed as Exhibit 1.1(a) to this report.

Certain of the Underwriters and their related entities have, from time to time, performed, and may in the future perform, various financial advisory and investment banking services for the Company, for which they have received or will receive customary fees and expense reimbursements.

The Securities are registered under the Federal Securities Act of 1933, as amended, under the Registration Statement on Form S-3ASR (Registration No. 333-185141) (the “Registration Statement”), which relates to the public offering from time to time of various securities of the Company. The Registration Statement includes a base prospectus dated November 26, 2012. In connection with the public offering of the Securities, the Company filed with the Securities and Exchange Commission (the “SEC”) under the Registration Statement a preliminary prospectus supplement dated November 26, 2012 and a definitive prospectus supplement dated November 27, 2012. Such definitive prospectus supplement (including the base prospectus) is referred to as the “Prospectus.” In accordance with the terms of the Registration Statement and the Prospectus, this Report on Form 8-K, together with the exhibits filed herewith, is being incorporated by reference into the Registration Statement and the Prospectus.

Note Purchase Agreement

On November 28, 2012, the Company entered into a Purchase Agreement (the “Purchase Agreement”) between the Company, the Company’s domestic subsidiaries as guarantors, and Goldman Sachs & Co. on behalf of itself and as representative of the several Initial Purchases specified therein (the “Purchasers”). Pursuant to the Purchase Agreement, the Purchasers have agreed to purchase, and the Company has agreed to issue and sell, $600 million aggregate principal amount of 5.125% senior notes due 2021 (the “Notes”), which the Purchasers have agreed to purchase for purposes of resale to investors in an offering exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”). Under the Purchase Agreement, the Notes are priced for purposes of such resale at 100.0% of the aggregate principal amount. The purchase and sale of the Notes is expected to close on or about December 7, 2012, subject to customary closing conditions.

The Purchase Agreement contains warranties, covenants and closing conditions that are customary for transactions of this type. In addition, the Company and the guarantors have agreed to indemnify the Purchasers against certain liabilities arising from the transactions under the Purchase Agreement, including liabilities under the federal securities laws. The Purchase Agreement also contains customary contribution provisions. The description of the Purchase Agreement contained in this report does not purport to be complete and is qualified in its entirety by reference to the complete text of such agreement, a copy of which is filed as Exhibit 1.1(b) to this report.

Certain of the Purchasers and their affiliates have from time to time provided various investment and commercial banking and financial advisory services to the Company and its affiliates for which they have received customary fees and commissions, and certain of the Purchasers and their affiliates may provide such services to the Company and its affiliates from time to time in the future, for which they would expect to receive customary fees and commissions.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits The following exhibits are being filed herewith:

1.1(a)		Underwriting Agreement, dated November 27, 2012, between Clean Harbors, Inc. and Goldman Sachs & Co., as representative of the several Underwriters named in Schedule I thereto.

1.1(b)		Purchase Agreement, dated November 28, 2012, between Clean Harbors, Inc., certain of its subsidiaries, and Goldman Sachs & Co. on behalf of itself and as representative of the several Initial Purchases specified therein.

5.1		Opinion of Davis, Malm & D’Agostine, P.C.

23		Consent of Davis, Malm & D’Agostine, P.C. (contained in Exhibit 5.1 hereto).

SIGNATURES

Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	Clean Harbors, Inc.
	(Registrant)


November 30, 2012	/s/ James M. Rutledge
	Vice Chairman, President and
	Chief Operating Officer

EX-1.1(A) 2 a12-27731_3ex1d1a.htm EX-1.1(A)

Exhibit 1.1(a)

CLEAN HARBORS, INC.

6,000,000 shares of Common Stock

Underwriting Agreement

November 27, 2012

Goldman, Sachs & Co.,

As representative of the several Underwriters

named in Schedule I hereto

200 West Street

New York, New York 10282

Ladies and Gentlemen:

Clean Harbors, Inc, a Massachusetts corporation (the “Company”), proposes, subject to the terms and conditions stated herein, to issue and sell to the Underwriters named in Schedule I hereto (the “Underwriters”) an aggregate of 6,000,000 shares (the “Firm Securities”) and, at the election of the Underwriters, up to 900,000 additional shares (the “Optional Securities”) of common stock (“Stock”) of the Company (the Firm Securities and the Optional Securities that the Underwriters elect to purchase pursuant to Section 2 hereof being collectively called the “Securities”).

Pursuant to an agreement and plan of merger dated as of October 26, 2012 (the “Merger Agreement”) among Safety-Kleen, Inc. (“Safety-Kleen”), the Company and CH Merger Sub, Inc., a wholly owned subsidiary of the Company, CH Merger Sub, Inc. will merge with and into Safety-Kleen, with Safety-Kleen being the surviving corporation and a wholly-owned subsidiary of the Company (the “Acquisition” and the date of the consummation of such Acquisition shall herein be referred to the “Acquisition Date”).

1. The Company represents and warrants to, and agrees with, each of the Underwriters that (it being understood that all references to “the Company and its subsidiaries” in this Section 1 shall be deemed to include Safety-Kleen and its subsidiaries; provided, however, that any representation or warranty made herein by the Company relating to Safety-Kleen or any of Safety-Kleen’s subsidiaries is based solely upon (i) the Company’s actual knowledge based upon its reasonable due diligence in connection with the Acquisition and (ii) the representations and warranties of Safety-Kleen contained in the Merger Agreement and on Safety-Kleen’s related notification obligations contained therein):

(a) An “automatic shelf registration statement” as defined under Rule 405 under the Securities Act of 1933, as amended (the “Act”) on Form S-3 (File

No. 333-185141) in respect of the Securities has been filed with the Securities and Exchange Commission (the “Commission”) not earlier than three years prior to the date hereof; such registration statement, and any post-effective amendment thereto, became effective on filing; and no stop order suspending the effectiveness of such registration statement or any part thereof has been issued and no proceeding for that purpose has been initiated or threatened by the Commission, and no notice of objection of the Commission to the use of such registration statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Act has been received by the Company (the base prospectus filed as part of such registration statement, in the form in which it has most recently been filed with the Commission on or prior to the date of this Agreement, is hereinafter called the “Basic Prospectus”; any preliminary prospectus (including any preliminary prospectus supplement) relating to the Securities filed with the Commission pursuant to Rule 424(b) under the Act is hereinafter called a “Preliminary Prospectus”; the various parts of such registration statement, including all exhibits thereto but excluding Form T-1 and including any prospectus supplement relating to the Securities that is filed with the Commission and deemed by virtue of Rule 430B to be part of such registration statement, each as amended at the time such part of the registration statement became effective, are hereinafter collectively called the “Registration Statement”; the Basic Prospectus as amended and supplemented immediately prior to the Applicable Time (as defined in Section 1(c) hereof), is hereinafter called the “Pricing Prospectus”; the form of the final prospectus relating to the Securities that will be filed with the Commission pursuant to Rule 424(b) under the Act in accordance with Section 5(a) hereof is hereinafter called the “Prospectus”; any reference herein to the Basic Prospectus, the Pricing Prospectus, any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include the documents incorporated by reference therein pursuant to Item 12 of Form S-3 under the Act, as of the date of such prospectus; any reference to any amendment or supplement to the Basic Prospectus, any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include any post-effective amendment to the Registration Statement, any prospectus supplement relating to the Securities filed with the Commission pursuant to Rule 424(b) under the Act and any documents filed under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and incorporated therein, in each case after the date of the Basic Prospectus, such Preliminary Prospectus, or the Prospectus, as the case may be; any reference to any amendment to the Registration Statement shall be deemed to refer to and include any annual report of the Company filed pursuant to Section 13(a) or 15(d) of the Exchange Act after the effective date of the Registration Statement that is incorporated by reference in the Registration Statement; and any “issuer free writing prospectus” as defined in Rule 433 under the Act relating to the Securities is hereinafter called an “Issuer Free Writing Prospectus”);

(b) No order preventing or suspending the use of any Preliminary Prospectus or any Issuer Free Writing Prospectus has been issued by the

Commission, and each Preliminary Prospectus, at the time of filing thereof, conformed in all material respects to the requirements of the Act and the rules and regulations of the Commission thereunder, and did not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by an Underwriter through Goldman, Sachs & Co. expressly for use therein;

(c) For the purposes of this Agreement, the “Applicable Time” is 5:15 p.m. (Eastern time) on the date of this Agreement. The Pricing Prospectus, taken together with the price per share and the number of shares offered, as of the Applicable Time, did not include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; and each Issuer Free Writing Prospectus listed on Schedule II(a) hereto does not conflict with the information contained in the Registration Statement, the Pricing Prospectus or the Prospectus and each such Issuer Free Writing Prospectus, as supplemented by and taken together with the Pricing Prospectus as of the Applicable Time, did not include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to statements or omissions made in an Issuer Free Writing Prospectus in reliance upon and in conformity with information furnished in writing to the Company by an Underwriter through Goldman, Sachs & Co. expressly for use therein;

(d) The documents incorporated by reference in the Pricing Prospectus and the Prospectus, when they became effective or were filed with the Commission, as the case may be, conformed in all material respects to the requirements of the Act or the Exchange Act, as applicable, and the rules and regulations of the Commission thereunder, and none of such documents contained an untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein not misleading; any further documents so filed and incorporated by reference in the Prospectus or any further amendment or supplement thereto, when such documents become effective or are filed with the Commission, as the case may be, will conform in all material respects to the requirements of the Act or the Exchange Act, as applicable, and the rules and regulations of the Commission thereunder and will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity

with information furnished in writing to the Company by an Underwriter through Goldman, Sachs & Co. expressly for use therein; and no such documents were filed with the Commission since the Commission’s close of business on the business day immediately prior to the date of this Agreement and prior to the execution of this Agreement, except as set forth on Schedule II(b) hereto;

(e) The Registration Statement conforms, and the Prospectus and any further amendments or supplements to the Registration Statement and the Prospectus will conform, in all material respects to the requirements of the Act and the rules and regulations of the Commission thereunder and do not and will not, as of the applicable effective date as to each part of the Registration Statement and as of the applicable filing date as to the Prospectus and any amendment or supplement thereto, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by an Underwriter through Goldman, Sachs & Co. expressly for use therein;

(f) Neither the Company nor any of its subsidiaries has sustained since the date of the latest audited financial statements included or incorporated by reference in the Pricing Prospectus any material loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, otherwise than as set forth or contemplated in the Pricing Prospectus; and, since the respective dates as of which information is given in the Registration Statement and the Pricing Prospectus, there has not been any change in the capital stock or long term debt of the Company or any of its subsidiaries or any material adverse change, or any development reasonably expected to result in a Material Adverse Effect (as defined below) otherwise than as set forth or contemplated in the Pricing Prospectus;

(g) The Company and its subsidiaries have good and marketable title in fee simple to all real property and good and marketable title to all personal property owned by them, in each case free and clear of all liens, encumbrances and defects except such as are described in the Pricing Prospectus or such as do not materially affect the value of such property and do not interfere with the use made and proposed to be made of such property by the Company and its subsidiaries; and any real property and buildings held under lease by the Company and its subsidiaries are held by them under valid, subsisting and enforceable leases with such exceptions as are not material and do not interfere with the use made and proposed to be made of such property and buildings by the Company and its subsidiaries;

(h) The Company has been duly incorporated and is validly existing as a corporation in good standing under the laws of Massachusetts, with power and authority (corporate and other) to own its properties and conduct its business as described in the Pricing Prospectus, and has been duly qualified as a foreign corporation for the transaction of business and is in good standing under the laws of each other jurisdiction in which it owns or leases properties or conducts any business so as to require such qualification, or is subject to no material liability or disability by reason of any failure to be so qualified or in good standing in any such jurisdiction; and each subsidiary of the Company has been duly incorporated or organized and is validly existing as a corporation or other entity in good standing under the laws of its jurisdiction of incorporation or organization, or subject to no material liability or disability by reason of any failure to be in good standing;

(i) The Company has an authorized capitalization as set forth in the Pricing Prospectus and all of the issued shares of capital stock of the Company have been duly and validly authorized and issued and are fully paid and non-assessable and conform to the description of the Stock contained in the Pricing Prospectus and Prospectus; and all of the issued shares and outstanding of capital stock or other equity interests of each subsidiary of the Company have been duly and validly authorized and issued, are fully paid and non-assessable and (except for directors’ qualifying shares and certain minority interests in foreign subsidiaries) are owned directly or indirectly by the Company, free and clear of all liens, encumbrances, equities or claims, except for liens granted under the Company’s Security Agreement (U.S. Domiciled Parties) between the Company and Bank of America, N.A. as agent;

(j) The Securities have been duly and validly authorized and, when issued and delivered against payment therefor as provided herein, will be duly and validly issued and fully paid and non-assessable and will conform to the description of the Securities contained in the Prospectus;

(k) The issue and sale of the Securities and the compliance by the Company with this Agreement and the consummation of the transactions herein contemplated will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Company or any of its subsidiaries is a party or by which the Company or any of its subsidiaries is bound or to which any of the property or assets of the Company or any of its subsidiaries is subject, nor will such action result in any violation of the provisions of the Articles of Organization or By-laws of the Company or any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any of its subsidiaries or any of their properties; and no consent, approval, authorization, order, registration or qualification of or with any such court or governmental agency or body is

required for the issue and sale of the Securities or the consummation by the Company of the transactions contemplated by this Agreement except such as have been obtained under the Act and such consents, approvals, authorizations, registrations or qualifications as may be required under state securities or Blue Sky laws in connection with the purchase and distribution of the Securities by the Underwriters;

(l) Neither the Company nor any of its subsidiaries is in violation of its Articles of Organization (or other similar charter document) or By-laws or in default in the performance or observance of any material obligation, covenant or condition contained in any indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument to which it is a party or by which it or any of its properties may be bound;

(m) The statements set forth in the Pricing Prospectus and Prospectus under the caption Description of Capital Stock, insofar as they purport to constitute a summary of the terms of the Securities, under the caption “Certain United States Federal Income and Estate Tax Considerations to Non-U.S. Holders”, and under the caption “Underwriting”, insofar as they purport to describe the provisions of the laws and documents referred to therein, are accurate, complete and fair;

(n) Other than as set forth in the Pricing Prospectus, there are no legal or governmental proceedings pending to which the Company or any of its subsidiaries is a party or of which any property of the Company or any of its subsidiaries is the subject which, if determined adversely to the Company or any of its subsidiaries, would individually or in the aggregate be reasonably expected to result in a material adverse effect on the current or future financial position, stockholders’ equity or results of operations of the Company and its subsidiaries (a “Material Adverse Effect”); and, to the best of the Company’s knowledge, no such proceedings are threatened or contemplated by governmental authorities or threatened by others;

(o) The Company is not and, after giving effect to the offering and sale of the Securities and the application of the proceeds thereof, will not be an “investment company”, or an entity controlled by an “investment company” as such term is defined in the Investment Company Act of 1940, as amended (the “Investment Company Act”);

(p) Deloitte & Touche LLP, who have audited certain financial statements of the Company and its subsidiaries (excluding Safety-Kleen and its subsidiaries) and the Company’s internal control over financial reporting and management’s assessment thereof, are independent public accountants as required by the Act and the rules and regulations of the Commission thereunder;

(q) To the knowledge of the Company, KPMG LLP, who have audited certain consolidated financial statements of Safety-Kleen and its subsidiaries are independent certified public accountants under rule 101 of the AICPA Code of Professional Conduct and its interpretations and rulings, and under the relevant standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”);;

(r) (A) (i) At the time of filing the Registration Statement, (ii) at the time of the most recent amendment thereto for the purposes of complying with Section 10(a)(3) of the Act (whether such amendment was by post-effective amendment, incorporated report filed pursuant to Section 13 or 15(d) of the Exchange Act or form of prospectus), and (iii) at the time the Company or any person acting on its behalf (within the meaning, for this clause only, of Rule 163(c) under the Act) made any offer relating to the Securities in reliance on the exemption of Rule 163 under the Act, the Company was a “well-known seasoned issuer” as defined in Rule 405 under the Act; and (B) at the earliest time after the filing of the Registration Statement that the Company or another offering participant made a bona fide offer (within the meaning of Rule 164(h)(2) under the Act) of the Securities, the Company was not an “ineligible issuer” as defined in Rule 405 under the Act;

(s) The Company maintains a system of internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Exchange Act) that complies with the requirements of the Exchange Act and has been designed by the Company’s principal executive officer and principal financial officer, or under their supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. Except as described in the Pricing Prospectus, the Company’s internal control over financial reporting is effective and the Company is not aware of any material weaknesses in its internal control over financial reporting;

(t) Since the date of the latest audited financial statements included or incorporated by reference in the Pricing Prospectus, except as described in the Pricing Prospectus there has been no change in the Company’s internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting;

(u) The Company maintains disclosure controls and procedures (as such term is defined in Rule 13a-15(e) under the Exchange Act) that comply with the requirements of the Exchange Act; such disclosure controls and procedures have been designed to ensure that material information relating to the Company and its subsidiaries is made known to the Company’s principal executive officer and principal financial officer by others within those entities; and except as

described in the Pricing Prospectus with respect to the Company’s internal control over financial reporting, such disclosure controls and procedures are effective;

(v) Except for this Agreement, there are no contracts, agreements or understandings between the Company and any person that would give rise to a valid claim against the Company, any of its subsidiaries or any Underwriter for a brokerage commission, finder’s fee or other like payment in connection with the offering of the Securities;

(w) This Agreement has been duly authorized, executed and delivered by the Company and the issuance of the Securities have been duly authorized by the Company;

(x) The Company and its subsidiaries possess adequate certificates, authorities or permits issued by appropriate governmental agencies or bodies necessary to conduct the business now operated by them and have not received any notice of proceedings relating to the revocation or modification of any such certificate, authority or permit that, if determined adversely to the Company or any of its subsidiaries, would, individually or in the aggregate, be reasonably expected to result in a Material Adverse Effect;

(y) No labor dispute with the employees of the Company or any subsidiary exists or, to the knowledge of the Company, is imminent that would, individually or in the aggregate, be reasonably expected to result in a Material Adverse Effect;

(z) The Company and its subsidiaries own, possess or can acquire on reasonable terms, adequate trademarks, trade names and other rights to inventions, know-how, patents, copyrights, confidential information and other intellectual property (collectively, “intellectual property rights”) necessary to conduct the business now operated by them, or presently employed by them, and have not received any notice of infringement of or conflict with asserted rights of others with respect to any intellectual property rights that, if determined adversely to the Company or any of its subsidiaries, would, individually or in the aggregate, be reasonably expected to result in a Material Adverse Effect;

(aa) Except as disclosed in the Pricing Prospectus and as would not, individually or in the aggregate, be reasonably expected to result in a Material Adverse Effect, (A) each of the Company and its subsidiaries is in compliance with, and not subject to liability under, Environmental Law (as defined below), (B) each of the Company and its subsidiaries has made all filings, and provided all financial assurances and notices, required under Environmental Law, and has, and is in compliance with, all permits required under Environmental Law and each of them is in full force and effect, (C) there is no civil, criminal or administrative action, suit, demand, claim, hearing, written notice of violation, proceeding, notice or demand letter or written request for information pending or,

to the knowledge of the Company, threatened, or, to the knowledge of the Company, investigation threatened or pending, against the Company or any of its subsidiaries under Environmental Law, (D) no lien, charge, encumbrance or restriction has been recorded under any Environmental Law with respect to any asset, facility or property owned, operated, leased or controlled by the Company or any of its subsidiaries, (E) neither the Company nor any of its subsidiaries has received notice that it has been identified as a potentially responsible party under the Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended (“CERCLA”), or any comparable Environmental Law, (F) no property or facility of the Company or any of its subsidiaries is (i) listed or proposed for listing on the National Priorities List promulgated pursuant to CERCLA, (ii) listed in the Comprehensive Environmental Response, Compensation and Liability In-formation System List promulgated pursuant to CERCLA, or (iii) listed on any comparable list of sites known or suspected to be contaminated with Hazardous Material (as defined below) as maintained by any governmental authority, (G) neither the Company nor any of its subsidiaries is conducting or financing an investigation, or response, corrective or other action pursuant to Environmental Law at any site or facility, nor is any of them subject to or party to any order, judgment, decree, contract or agreement which obligates it to conduct or finance any such action nor has any of them assumed by contract or agreement or otherwise any obligation or liability under Environmental Law, and (H) there are no past or present events, activities, operations, occurrences or conditions which could reasonably be expected to prevent or interfere with compliance by the Company or any of its subsidiaries with, or result in liability of any of them under, Environmental Law (including, without limitation, any capital or operating expenditures required for cleanup, closure or compliance with Environmental Law, any constraints on operating activities and any potential liability to third parties);

For purposes of this Agreement, “Environmental Law” means the common law and all applicable federal, provincial, state and local laws or regulations, codes, ordinances, orders, decrees, judgments or injunctions issued, promulgated, approved or entered thereunder, relating to pollution or protection of public or employee health and safety, the environment or natural resources, including, without limitation, those relating to (i) emissions, discharges, releases or threatened releases of Hazardous Material in or into the environment (including, without limitation, ambient air, surface water, groundwater, drinking water, land surface or subsurface strata, and natural resources such as wetlands, flora and fauna) or exposure thereto, (ii) the manufacture, processing, distribution, use, generation, treatment, storage, disposal, transport, handling or recycling of Hazardous Material, (iii) zoning, facility siting, financial assurance, environmental impact assessment or review, reclamation or land use and (iv) underground or aboveground storage tanks and related piping, and emissions, discharges, releases or threatened releases therefrom. For purposes of this Agreement, “Hazardous Material” means any substance, material, pollutant, contaminant, chemical, constituent or waste, in any form, including without limitation, petroleum and petroleum products, subject to regulation under or which could give rise to liability under Environmental Law;

(bb) (i) The financial statements of the Company and its consolidated subsidiaries (excluding Safety-Kleen and each of its subsidiaries) included in the Pricing Prospectus present fairly the financial position of the Company and its consolidated subsidiaries as of the dates shown and their results of operations and cash flows for the periods shown and, except as otherwise disclosed in the Pricing Prospectus, such financial statements have been prepared in conformity with the generally accepted accounting principles in the United States applied on a consistent basis; (ii) to the knowledge of the Company, the financial statements of Safety-Kleen and its consolidated subsidiaries included in the Pricing Prospectus present fairly the financial position of the Safety-Kleen and its consolidated subsidiaries as of the dates shown and their results of operations and cash flows for the periods shown and, except as otherwise disclosed in the Pricing Prospectus, such financial statements have been prepared in conformity with the generally accepted accounting principles in the United States applied on a consistent basis; (iii) the pro forma financial information and the related notes thereto included in the Pricing Prospectus have been prepared in accordance with the applicable requirements of the Act and the assumptions underlying such pro forma financial information are reasonable and are set forth in the Pricing Prospectus; and (iv) the interactive data in eXtensible Business Reporting Language included or incorporated by reference in the Pricing Prospectus present fairly the information called for in all material respects and has been prepared in accordance with the Commission’s rules and guidelines applicable thereto;

(cc) The Company is subject to the reporting requirements of either Section 13 or Section 15(d) of the Exchange Act and files reports with the Commission on the Next — Generation Electronic Data Gathering, Analysis, and Retrieval (EDGAR) system (“EDGAR”);

(dd) Neither the Company nor any of its subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee or affiliate of the Company or any of its subsidiaries is aware of or has taken any action, directly or indirectly, that would result in a violation by such persons of the Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations thereunder (the “FCPA”), including, without limitation, making use of the mails or any means or instrumentality of interstate commerce corruptly in furtherance of an offer, payment, promise to pay or authorization of the payment of any money, or other property, gift, promise to give, or authorization of the giving of any-thing of value to any “foreign official” (as such term is defined in the FCPA) or any foreign political party or official thereof or any candidate for foreign political office, in contravention of the FCPA and the Company, its subsidiaries and, to the knowledge of the Company, its affiliates have conducted their businesses in compliance with the FCPA and have instituted and maintain policies and procedures designed to ensure, and which are reasonably expected to continue to ensure, continued compliance therewith;

(ee) The operations of the Company and its subsidiaries are and have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the money laundering statutes of all applicable jurisdictions, the rules and regulations thereunder and any related or similar rules, regulations or guidelines issued, ad-ministered or enforced by any governmental agency (collectively, the “Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the best knowledge of the Company, threatened; and

(ff) Neither the Company nor any of its subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee or affiliate of the Company or any of its subsidiaries is currently subject to any U.S. sanctions administered by the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”); and the Company will not directly or indirectly use the proceeds of the offering, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity, for the purpose of financing the activities of any person currently subject to any U.S. sanctions administered by OFAC.

2. Subject to the terms and conditions herein set forth, (a) the Company agrees to issue and sell to each of the Underwriters, and each of the Underwriters agree, severally and not jointly, to purchase from the Company, at a purchase price per share of $53.62, the number of Firm Securities set forth opposite the name of such Underwriter in Schedule I hereto and (b) in the event and to the extent that the Underwriters shall exercise the election to purchase Optional Securities as provided below, the Company agrees to issue and sell to each of the Underwriters, and each of the Underwriters agrees, severally and not jointly, to purchase from the Company, at the purchase price per share set forth in clause (a) of this Section 2, that portion of the number of Optional Securities as to which such election shall have been exercised (to be adjusted by you so as to eliminate fractional shares) determined by multiplying such number of Optional Securities by a fraction, the numerator of which is the maximum number of Optional Securities which such Underwriter is entitled to purchase as set forth opposite the name of such Underwriter in Schedule I hereto and the denominator of which is the maximum number of Optional Securities that all of the Underwriters are entitled to purchase hereunder.

The Company hereby grants to the Underwriters the right to purchase at their election up to 900,000 Optional Securities, at the purchase price per share set forth in the paragraph above, for the sole purpose of covering sales of shares in excess of the number of Firm Securities, provided that the purchase price per Optional Share shall be reduced by an amount per share equal to any dividends or distributions declared by the Company and payable on the Firm Securities but not payable on the Optional Securities. Any such election to purchase Optional Securities may be exercised only by written notice from you to the Company, given within a period of 30 calendar days after the date of this Agreement, setting forth the aggregate number of Optional Securities to be purchased and

the date on which such Optional Securities are to be delivered, as determined by you but in no event earlier than the First Time of Delivery (as defined in Section 4 hereof) or, unless you and the Company otherwise agree in writing, earlier than two or later than ten business days after the date of such notice.

3. Upon the authorization by you of the release of the Firm Securities, the several Underwriters propose to offer the Firm Securities for sale upon the terms and conditions set forth in the Prospectus.

4. (a) The Securities to be purchased by each Underwriter hereunder, in definitive form, and in such authorized denominations and registered in such names as Goldman, Sachs & Co. may request upon at least forty-eight hours’ prior notice to the Company shall be delivered by or on behalf of the Company to Goldman, Sachs & Co., through the facilities of the Depository Trust Company (“DTC”), for the account of such Underwriter, against payment by or on behalf of such Underwriter of the purchase price therefor by wire transfer of Federal (same-day) funds to the account specified by the Company to Goldman, Sachs & Co. at least forty-eight hours in advance. The Company will cause the certificates representing the Securities to be made available for checking and packaging at least twenty-four hours prior to the Time of Delivery (as defined below) with respect thereto at the office of DTC or its designated custodian (the “Designated Office”). The time and date of such delivery and payment shall be, with respect to the Firm Shares, 9:30 a.m., New York City time, on December 3, 2012 or such other time and date as Goldman, Sachs & Co. and the Company may agree upon in writing, and, with respect to the Optional Shares, 9:30 a.m., New York time, on the date specified by Goldman, Sachs & Co. in the written notice given by Goldman, Sachs & Co. of the Underwriters’ election to purchase such Optional Shares, or such other time and date as Goldman, Sachs & Co. and the Company may agree upon in writing. Such time and date for delivery of the Firm Shares is herein called the “First Time of Delivery”, such time and date for delivery of the Optional Shares, if not the First Time of Delivery, is herein called the “Second Time of Delivery”, and each such time and date for delivery is herein called a “Time of Delivery”.

(b) The documents to be delivered at each Time of Delivery by or on behalf of the parties hereto pursuant to Section 8 hereof, including the cross-receipt for the Securities and any additional documents requested by the Underwriters pursuant to Section 8 hereof, will be delivered at the offices of Cahill Gordon & Reindel LLP, 1271 Avenue of the Americas, New York, NY 10020 (the “Closing Location”), and the Securities will be delivered at the Designated Office, all at such Time of Delivery. A meeting will be held at the Closing Location at 3:00 p.m., New York City time, on the New York Business Day next preceding such Time of Delivery, at which meeting the final drafts of the documents to be delivered pursuant to the preceding sentence will be available for review by the parties hereto. For the purposes of this Section 4, “New York Business Day” shall mean each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in New York City are generally authorized or obligated by law or executive order to close.

5. The Company agrees with each of the Underwriters:

(a) To prepare the Prospectus in a form approved by you and to file such Prospectus pursuant to Rule 424(b) under the Act not later than the Commission’s close of business on the second business day following the

execution and delivery of this Agreement; to make no further amendment or any supplement to the Registration Statement, the Basic Prospectus or the Prospectus prior to the last Time of Delivery which shall be disapproved by you promptly after reasonable notice thereof; to advise you, promptly after it receives notice thereof, of the time when any amendment to the Registration Statement has been filed or becomes effective or any amendment or supplement to the Prospectus has been filed and to furnish you with copies thereof; to file promptly all other material required to be filed by the Company with the Commission pursuant to Rule 433(d) under the Act; to file promptly all reports and any definitive proxy or information statements required to be filed by the Company with the Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of the Prospectus and for so long as the delivery of a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) is required in connection with the offering or sale of the Securities; to advise you, promptly after it receives notice thereof, of the issuance by the Commission of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or other prospectus in respect of the Securities, of any notice of objection of the Commission to the use of the Registration Statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Act, of the suspension of the qualification of the Securities for offering or sale in any jurisdiction, of the initiation or threatening of any proceeding for any such purpose, or of any request by the Commission for the amending or supplementing of the Registration Statement or the Prospectus or for additional information; and, in the event of the issuance of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or other prospectus or suspending any such qualification, to promptly use its best efforts to obtain the withdrawal of such order; and in the event of any such issuance of a notice of objection, promptly to take such steps including, without limitation, amending the Registration Statement or filing a new registration statement, at its own expense, as may be necessary to permit offers and sales of the Securities by the Underwriters (references herein to the Registration Statement shall include any such amendment or new registration statement);

(b) If required by Rule 430B(h) under the Act, to prepare a form of prospectus in a form approved by you and to file such form of prospectus pursuant to Rule 424(b) under the Act not later than may be required by Rule 424(b) under the Act; and to make no further amendment or supplement to such form of prospectus which shall be disapproved by you promptly after reasonable notice thereof;

(c) If by the third anniversary (the “Renewal Deadline”) of the initial effective date of the Registration Statement, any of the Securities remain unsold by the Underwriters, the Company will file, if it has not already done so and is eligible to do so, a new automatic shelf registration statement relating to the Securities, in a form satisfactory to you. If at the Renewal Deadline the Company

is no longer eligible to file an automatic shelf registration statement, the Company will, if it has not already done so, file a new shelf registration statement relating to the Securities, in a form satisfactory to you and will use its best efforts to cause such registration statement to be declared effective within 180 days after the Renewal Deadline. The Company will take all other action necessary or appropriate to permit the public offering and sale of the Securities to continue as contemplated in the expired registration statement relating to the Securities. References herein to the Registration Statement shall include such new automatic shelf registration statement or such new shelf registration statement, as the case may be;

(d) Promptly from time to time to take such action as you may reasonably request to qualify the Securities for offering and sale under the securities laws of such jurisdictions as you may request and to comply with such laws so as to permit the continuance of sales and dealings therein in such jurisdictions for as long as may be necessary to complete the distribution of the Securities, provided that in connection therewith the Company shall not be required to qualify as a foreign corporation or to file a general consent to service of process in any jurisdiction;

(e) Prior to 10:00 a.m., New York City time, on the New York Business Day next succeeding the date of this Agreement and from time to time, to furnish the Underwriters with written and electronic copies of the Prospectus in New York City in such quantities as you may reasonably request, and, if the delivery of a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) is required at any time prior to the expiration of nine months after the time of issue of the Prospectus in connection with the offering or sale of the Securities and if at such time any event shall have occurred as a result of which the Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made when such Prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) is delivered, not misleading, or, if for any other reason it shall be necessary during such same period to amend or supplement the Prospectus or to file under the Exchange Act any document incorporated by reference in the Prospectus in order to comply with the Act or the Exchange Act, to notify you and upon your request to file such document and to prepare and furnish without charge to each Underwriter and to any dealer in securities as many written and electronic copies as you may from time to time reasonably request of an amended Prospectus or a supplement to the Prospectus which will correct such statement or omission or effect such compliance; and in case any Underwriter is required to deliver a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) in connection with sales of any of the Securities at any time nine months or more after the time of issue of the Prospectus, upon your request but at the expense of such Underwriter, to prepare and deliver to such Underwriter

as many written and electronic copies as you may request of an amended or supplemented Prospectus complying with Section 10(a)(3) of the Act;

(f) To make generally available to its security holders as soon as practicable, but in any event not later than sixteen months after the effective date of the Registration Statement (as defined in Rule 158(c) under the Act), an earnings statement of the Company and its subsidiaries (which need not be audited) complying with Section 11(a) of the Act and the rules and regulations of the Commission thereunder (including, at the option of the Company, Rule 158);

(g) During the period beginning from the date hereof and continuing to and including the date 90 days after the date of the Prospectus, not to offer, sell, contract to sell, pledge, grant any option to purchase, make any short sale or otherwise dispose, except as provided hereunder, of any securities of the Company that are substantially similar to the Securities, including but not limited to any options or warrants to purchase shares of Stock or any securities that are convertible into or exchangeable for, or that represent the right to receive, Stock or any such substantially similar securities (other than pursuant to employee stock option plans existing on, or upon the conversion or exchange of convertible or exchangeable securities outstanding as of, the date of this Agreement), without your prior written consent;

(h) To pay the required Commission filing fees relating to the Securities within the time required by Rule 456(b)(1) under the Act without regard to the proviso therein and otherwise in accordance with Rules 456(b) and 457(r) under the Act;

(i) To use the net proceeds received by it from the sale of the Securities pursuant to this Agreement in the manner specified in the Pricing Prospectus under the caption “Use of Proceeds”;

(j) To use its best efforts to list the Securities on the New York Stock Exchange (the “Exchange”); and

(k) Upon request of any Underwriter, to furnish, or cause to be furnished, to such Underwriter an electronic version of the Company’s trademarks, servicemarks and corporate logo for use on the website, if any, operated by such Underwriter for the purpose of facilitating the on-line offering of the Securities (the “License”); provided, however, that the License shall be used solely for the purpose described above, is granted without any fee and may not be assigned or transferred

(l) The Company represents and agrees that, without the prior consent of Goldman, Sachs & Co., it has not made and will not make any offer relating to the Securities that would constitute a “free writing prospectus” as defined in Rule 405 under the Act; each Underwriter represents and agrees that, without the prior

consent of the Company and Goldman, Sachs & Co., it has not made and will not make any offer relating to the Securities that would constitute a free writing prospectus; any such free writing prospectus the use of which has been consented to by the Company and Goldman, Sachs & Co. is listed on Schedule II(a) hereto;

(m) The Company has complied and will comply with the requirements of Rule 433 under the Act applicable to any Issuer Free Writing Prospectus, including timely filing with the Commission or retention where required and legending; and

(n) The Company agrees that if at any time following issuance of an Issuer Free Writing Prospectus any event occurred or occurs as a result of which such Issuer Free Writing Prospectus would conflict with the information in the Registration Statement, the Pricing Prospectus or the Prospectus or would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances then prevailing, not misleading, the Company will give prompt notice thereof to Goldman, Sachs & Co. and, if requested by Goldman, Sachs & Co., will prepare and furnish without charge to each Underwriter an Issuer Free Writing Prospectus or other document which will correct such conflict, statement or omission; provided, however, that this representation and warranty shall not apply to any statements or omissions in an Issuer Free Writing Prospectus made in reliance upon and in conformity with information furnished in writing to the Company by an Underwriter through Goldman, Sachs & Co. expressly for use therein.

6. The Company covenants and agrees with the several Underwriters that the Company will pay or cause to be paid the following: (i) the fees, disbursements and expenses of the Company’s counsel and accountants in connection with the registration of the Securities under the Act and all other expenses in connection with the preparation, printing, reproduction and filing of the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, any Issuer Free Writing Prospectus and the Prospectus and amendments and supplements thereto and the mailing and delivering of copies thereof to the Underwriters and dealers; (ii) the cost of printing or producing any Agreement among Underwriters, this Agreement, the Blue Sky Memorandum, closing documents (including any compilations thereof) and any other documents in connection with the offering, purchase, sale and delivery of the Securities; (iii) all expenses in connection with the qualification of the Securities for offering and sale under state securities laws as provided in Section 5(d) hereof, including the fees and disbursements of counsel for the Underwriters in connection with such qualification and in connection with the Blue Sky Memorandum; (iv) all fees and expenses in connection with listing the Securities on the Exchange; (v) the cost of preparing the Securities; (vi) the cost and charges of any transfer agent or registrar; and (vii) all other costs and expenses incident to the performance of its obligations hereunder which are not otherwise specifically provided for in this Section. It is understood, however, that, except as provided in this Section, and Sections 9 and 12 hereof, the Underwriters will pay all of their own costs and expenses, including the fees of their counsel, transfer taxes on resale of any of the Securities by them, and any advertising expenses connected with any offers they may make.

7. The obligations of the Underwriters hereunder, as to the Securities to be delivered at each Time of Delivery, shall be subject, in their discretion, to the condition that all representations and warranties and other statements of the Company herein are, at and as of such Time of Delivery, true and correct, the condition that the Company shall have performed all of its obligations hereunder theretofore to be performed, and the following additional conditions:

(a) The Prospectus shall have been filed with the Commission pursuant to Rule 424(b) under the Act within the applicable time period prescribed for such filing by the rules and regulations under the Act and in accordance with Section 5(a) hereof; all material required to be filed by the Company pursuant to Rule 433(d) under the Act shall have been filed with the Commission within the applicable time period prescribed for such filings by Rule 433; no stop order suspending the effectiveness of the Registration Statement or any part thereof shall have been issued and no proceeding for that purpose shall have been initiated or threatened by the Commission and no notice of objection of the Commission to the use of the Registration Statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Act shall have been received; no stop order suspending or preventing the use of the Prospectus or any Issuer Free Writing Prospectus shall have been initiated or threatened by the Commission; and all requests for additional information on the part of the Commission shall have been complied with to your reasonable satisfaction;

(b) Cahill Gordon & Reindel LLP, counsel for the Underwriters, shall have furnished to you such written opinion or opinions, dated such Time of Delivery, in form and substance satisfactory to you;

(c) Davis, Malm & D’Agostine, P.C., counsel for the Company, shall have furnished to you their written opinion (the form of such opinion is attached as Annex I hereto), dated such Time of Delivery, in form and substance satisfactory to you;

(d) On the date of the Prospectus at a time prior to the execution of this Agreement, at 8:00 a.m., New York City time, on the effective date of any post effective amendment to the Registration Statement filed subsequent to the date of this Agreement and also at each Time of Delivery, (i) Deloitte & Touche LLP shall have furnished to you a letter or letters, dated the respective dates of delivery thereof, in form and substance satisfactory to you, and, (ii) KPMG LLP shall have furnished to you a letter or letters, dated the respective dates of delivery thereof, in form and substance satisfactory to you;

(e) (i) Neither the Company nor any of its subsidiaries shall have sustained since the date of the latest audited financial statements included or incorporated by reference in the Prospectus any loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, otherwise than as set forth or contemplated in the Prospectus, and (ii)

since the respective dates as of which information is given in the Prospectus there shall not have been any change in the capital stock or long term debt of the Company or any of its subsidiaries or any change, or any development involving a prospective change, in or affecting the general affairs, management, financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, otherwise than as set forth or contemplated in the Prospectus, the effect of which, in any such case described in clause (i) or (ii), is in your judgment so material and adverse as to make it impracticable or inadvisable to proceed with the public offering or the delivery of the Securities being delivered at such Time of Delivery on the terms and in the manner contemplated in the Prospectus;

(f) On or after the Applicable Time (i) no downgrading shall have occurred in the rating accorded the Company’s debt securities by any “nationally recognized statistical rating organization”, as that term is defined by the Commission for purposes of Section 3(a)(62) of the Act, and (ii) no such organization shall have publicly announced that it has under surveillance or review, with possible negative implications, its rating of any of the Company’s debt securities;

(g) On or after the Applicable Time there shall not have occurred any of the following: (i) a suspension or material limitation in trading in securities generally on the Exchange; (ii) a suspension or material limitation in trading in the Company’s securities on the Exchange; (iii) a general moratorium on commercial banking activities declared by either Federal or New York State authorities or a material disruption in commercial banking or securities settlement or clearance services in the United States; (iv) the outbreak or escalation of hostilities involving the United States or the declaration by the United States of a national emergency or war or (v) the occurrence of any other calamity or crisis or any change in financial, political or economic conditions in the United States or elsewhere, if the effect of any such event specified in clause (iv) or (v) in your judgment makes it impracticable or inadvisable to proceed with the public offering or the delivery of the Securities being delivered at such Time of Delivery on the terms and in the manner contemplated in the Prospectus;

(h) The Company shall have complied with the provisions of Section 5(e) hereof with respect to the furnishing of prospectuses on the New York Business Day next succeeding the date of this Agreement;

(i) The Securities shall have been duly listed, subject to notice of issuance, on the Exchange;

(j) The Company has obtained and delivered to the Underwriters executed copies of an agreement from all officers and directors listed on Schedule IV hereto, substantially to the effect set forth in Section 5(g) hereof in form and substance satisfactory to you; and

(k) The Company shall have furnished or caused to be furnished to you at such Time of Delivery certificates of officers of the Company satisfactory to you as to the accuracy of the representations and warranties of the Company herein at and as of such time, as to the performance by the Company of all of its obligations hereunder to be performed at or prior to such time, as to the matters set forth in subsections (a) and (e) of this Section and as to such other matters as you may reasonably request.

8. (a) The Company will indemnify and hold harmless each Underwriter against any losses, claims, damages or liabilities, joint or several, to which such Underwriter may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus or any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Act, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, and will reimburse each Underwriter for any legal or other expenses reasonably incurred by such Underwriter in connection with investigating or defending any such action or claim as such expenses are incurred; provided, however, that the Company shall not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, in reliance upon and in conformity with written information furnished to the Company by any Underwriter through Goldman, Sachs & Co. expressly for use therein.

(b) Each Underwriter agrees severally and not jointly to indemnify and hold harmless the Company against any losses, claims, damages or liabilities to which the Company may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus or any such amendment or supplement thereto, or any Issuer Free Writing Prospectus, in reliance upon and in conformity with written information furnished to the Company by such Underwriter through Goldman, Sachs & Co. expressly for use therein; and will reimburse the Company for any legal or other expenses reasonably incurred by the Company in connection with investigating or defending any such action or claim as such expenses are incurred.

(c) Promptly after receipt by an indemnified party under subsection (a) or (b) above of notice of the commencement of any action, such indemnified party shall, if a claim in respect

thereof is to be made against the indemnifying party under such subsection, notify the indemnifying party in writing of the commencement thereof; but the omission so to notify the indemnifying party shall not relieve it from any liability which it may have to any indemnified party otherwise than under such subsection. In case any such action shall be brought against any indemnified party and it shall notify the indemnifying party of the commencement thereof, the indemnifying party shall be entitled to participate therein and, to the extent that it shall wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel satisfactory to such indemnified party (who shall not, except with the consent of the indemnified party, be counsel to the indemnifying party), and, after notice from the indemnifying party to such indemnified party of its election so to assume the defense thereof, the indemnifying party shall not be liable to such indemnified party under such subsection for any legal expenses of other counsel or any other expenses, in each case subsequently incurred by such indemnified party, in connection with the defense thereof other than reasonable costs of investigation. No indemnifying party shall, without the written consent of the indemnified party, effect the settlement or compromise of, or consent to the entry of any judgment with respect to, any pending or threatened action or claim in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified party is an actual or potential party to such action or claim) unless such settlement, compromise or judgment (i) includes an unconditional release of the indemnified party from all liability arising out of such action or claim and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act, by or on behalf of any indemnified party.

(d) If the indemnification provided for in this Section 9 is unavailable to or insufficient to hold harmless an indemnified party under subsection (a) or (b) above in respect of any losses, claims, damages or liabilities (or actions in respect thereof) referred to therein, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities (or actions in respect thereof) in such proportion as is appropriate to reflect the relative benefits received by the Company on the one hand and the Underwriters on the other from the offering of the Securities. If, however, the allocation provided by the immediately preceding sentence is not permitted by applicable law or if the indemnified party failed to give the notice required under subsection (c) above, then each indemnifying party shall contribute to such amount paid or payable by such indemnified party in such proportion as is appropriate to reflect not only such relative benefits but also the relative fault of the Company on the one hand and the Underwriters on the other in connection with the statements or omissions which resulted in such losses, claims, damages or liabilities (or actions in respect thereof), as well as any other relevant equitable considerations. The relative benefits received by the Company on the one hand and the Underwriters on the other shall be deemed to be in the same proportion as the total net proceeds from the offering (before deducting expenses) received by the Company bear to the total underwriting discounts and commissions received by the Underwriters, in each case as set forth in the table on the cover page of the Prospectus. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company on the one hand or the Underwriters on the other and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The Company and the Underwriters agree that it would not be just and equitable if contribution pursuant to this subsection (d) were determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to above in this subsection (d). The amount paid or payable by an indemnified party as a result of the

losses, claims, damages or liabilities (or actions in respect thereof) referred to above in this subsection (d) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this subsection (d), no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Securities underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters’ obligations in this subsection (d) to contribute are several in proportion to their respective underwriting obligations and not joint.

(e) The obligations of the Company under this Section 9 shall be in addition to any liability which the Company may otherwise have and shall extend, upon the same terms and conditions, to each person, if any, who controls any Underwriter within the meaning of the Act and each broker-dealer affiliate of any Underwriter; and the obligations of the Underwriters under this Section 9 shall be in addition to any liability which the respective Underwriters may otherwise have and shall extend, upon the same terms and conditions, to each officer and director of the Company (including any person who, with his or her consent, is named in the Registration Statement as about to become a director of the Company) and to each person, if any, who controls the Company within the meaning of the Act.

9. (a) If any Underwriter shall default in its obligation to purchase the Securities which it has agreed to purchase hereunder at a Time of Delivery, you may in your discretion arrange for you or another party or other parties to purchase such Securities on the terms contained herein. If within thirty six hours after such default by any Underwriter you do not arrange for the purchase of such Securities, then the Company shall be entitled to a further period of thirty six hours within which to procure another party or other parties satisfactory to you to purchase such Securities on such terms. In the event that, within the respective prescribed periods, you notify the Company that you have so arranged for the purchase of such Securities, or the Company notifies you that it has so arranged for the purchase of such Securities, you or the Company shall have the right to postpone such Time of Delivery for a period of not more than seven days, in order to effect whatever changes may thereby be made necessary in the Registration Statement or the Prospectus, or in any other documents or arrangements, and the Company agrees to file promptly any amendments or supplements to the Registration Statement or the Prospectus which in your opinion may thereby be made necessary. The term “Underwriter” as used in this Agreement shall include any person substituted under this Section with like effect as if such person had originally been a party to this Agreement with respect to such Securities.

(b) If, after giving effect to any arrangements for the purchase of the Securities of a defaulting Underwriter or Underwriters by you and the Company as provided in subsection (a) above, the aggregate number of such Securities which remains unpurchased does not exceed one eleventh of the aggregate number of all the Securities to be purchased at such Time of Delivery, then the Company shall have the right to require each non-defaulting Underwriter to purchase the number of shares which such Underwriter agreed to purchase hereunder at such Time of Delivery and, in addition, to require each non-defaulting Underwriter to purchase its pro rata share (based on the number of Securities which such Underwriter agreed to purchase hereunder) of the

Securities of such defaulting Underwriter or Underwriters for which such arrangements have not been made; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

(c) If, after giving effect to any arrangements for the purchase of the Securities of a defaulting Underwriter or Underwriters by you and the Company as provided in subsection (a) above, the aggregate number of such Securities which remains unpurchased exceeds one eleventh of the aggregate number of all the Securities to be purchased at such Time of Delivery, or if the Company shall not exercise the right described in subsection (b) above to require non-defaulting Underwriters to purchase Securities of a defaulting Underwriter or Underwriters, then this Agreement (or, with respect to a Second Time of Delivery, the obligations of the Underwriters to purchase and of the Company to sell the Optional Securities) shall thereupon terminate, without liability on the part of any non-defaulting Underwriter or the Company, except for the expenses to be borne by the Company and the Underwriters as provided in Section 7 hereof and the indemnity and contribution agreements in Section 9 hereof; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

10. The respective indemnities, agreements, representations, warranties and other statements of the Company and the several Underwriters, as set forth in this Agreement or made by or on behalf of them, respectively, pursuant to this Agreement, shall remain in full force and effect, regardless of any investigation (or any statement as to the results thereof) made by or on behalf of any Underwriter or any controlling person of any Underwriter, or the Company, or any officer or director or controlling person of the Company, and shall survive delivery of and payment for the Securities.

11. If this Agreement shall be terminated pursuant to Section 10 hereof, the Company shall not then be under any liability to any Underwriter except as provided in Sections 7 and 9 hereof; but, if for any other reason, any of the Securities are not delivered by or on behalf of the Company as provided herein, the Company will reimburse the Underwriters through you for all out of pocket expenses approved in writing by you, including fees and disbursements of counsel, reasonably incurred by the Underwriters in making preparations for the purchase, sale and delivery of the Securities not so delivered, but the Company shall then be under no further liability to any Underwriter except as provided in Sections 7 and 9 hereof.

12. In all dealings hereunder, you shall act on behalf of each of the Underwriters, and the parties hereto shall be entitled to act and rely upon any statement, request, notice or agreement on behalf of any Underwriter made or given by you jointly or by Goldman, Sachs & Co. on behalf of you as the representative.

All statements, requests, notices and agreements hereunder shall be in writing, and if to the Underwriters shall be delivered or sent by mail, telex or facsimile transmission to you as the representative at Goldman, Sachs & Co., 200 West Street, New York, New York 10282-2198, Attention: Registration Department; and if to the Company shall be delivered or sent by mail, telex or facsimile transmission to the address of the Company set forth in the Registration Statement, Attention: Secretary; provided, however, that any notice to an Underwriter pursuant to Section 9(c) hereof shall be delivered or sent by mail, telex or facsimile transmission to such Underwriter at its address set forth in its Underwriters’ Questionnaire, or telex constituting such

Questionnaire, which address will be supplied to the Company by you upon request. Any such statements, requests, notices or agreements shall take effect upon receipt thereof.

In accordance with the requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)), the Underwriters are required to obtain, verify and record information that identifies their respective clients, including the Company, which information may include the name and address of their respective clients, as well as other information that will allow the Underwriters to properly identify their respective clients.

13. This Agreement shall be binding upon, and inure solely to the benefit of, the Underwriters, the Company and, to the extent provided in Sections 9 and 11 hereof, the officers and directors of the Company and each person who controls the Company or any Underwriter, and their respective heirs, executors, administrators, successors and assigns, and no other person shall acquire or have any right under or by virtue of this Agreement. No purchaser of any of the Securities from any Underwriter shall be deemed a successor or assign by reason merely of such purchase.

14. Time shall be of the essence of this Agreement. As used herein, the term “business day” shall mean any day when the Commission’s office in Washington, D.C. is open for business.

15. The Company acknowledges and agrees that (i) the purchase and sale of the Securities pursuant to this Agreement is an arm’s-length commercial transaction between the Company, on the one hand, and the several Underwriters, on the other, (ii) in connection therewith and with the process leading to such transaction each Underwriter is acting solely as a principal and not the agent or fiduciary of the Company, (iii) no Underwriter has assumed an advisory or fiduciary responsibility in favor of the Company with respect to the offering contemplated hereby or the process leading thereto (irrespective of whether such Underwriter has advised or is currently advising the Company on other matters) or any other obligation to the Company except the obligations expressly set forth in this Agreement and (iv) the Company has consulted its own legal and financial advisors to the extent it deemed appropriate. The Company agrees that it will not claim that the Underwriters, or any of them, has rendered advisory services of any nature or respect, or owes a fiduciary or similar duty to the Company, in connection with such transaction or the process leading thereto.

16. This Agreement supersedes all prior agreements and understandings (whether written or oral) between the Company and the Underwriters, or any of them, with respect to the subject matter hereof.

17. THIS AGREEMENT AND ANY MATTERS RELATED TO THIS TRANSACTION SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO PRINCIPLES OF CONFLICT OF LAWS THAT WOULD RESULT IN THE APPLICATION OF ANY LAW OTHER THAN THE LAWS OF THE STATE OF NEW YORK. The Company agrees that any suit or proceeding arising in respect of this agreement or our engagement will be tried exclusively in the U.S. District Court for the Southern District of New York or, if that court does not have

subject matter jurisdiction, in any state court located in The City and County of New York and the Company agrees to submit to the jurisdiction of, and to venue in, such courts.

18. The Company and each of the Underwriters hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Agreement or the transactions contemplated hereby.

19. This Agreement may be executed by any one or more of the parties hereto in any number of counterparts, each of which shall be deemed to be an original, but all such respective counterparts shall together constitute one and the same instrument.

20. Notwithstanding anything herein to the contrary, the Company is authorized to disclose to any persons the U.S. federal and state income tax treatment and tax structure of the potential transaction and all materials of any kind (including tax opinions and other tax analyses) provided to the Company relating to that treatment and structure, without the Underwriters’ imposing any limitation of any kind. However, any information relating to the tax treatment and tax structure shall remain confidential (and the foregoing sentence shall not apply) to the extent necessary to enable any person to comply with securities laws. For this purpose, “tax structure” is limited to any facts that may be relevant to that treatment.

If the foregoing is in accordance with your understanding, please sign and return to us counterparts hereof, and upon the acceptance hereof by you, on behalf of each of the Underwriters, this letter and such acceptance hereof shall constitute a binding agreement between each of the Underwriters and the Company. It is understood that your acceptance of this letter on behalf of each of the Underwriters is pursuant to the authority set forth in a form of Agreement among Underwriters, the form of which shall be submitted to the Company for examination upon request, but without warranty on your part as to the authority of the signers thereof.

		Very truly yours,

		CLEAN HARBORS, INC


		By:	/s/ James M. Rutledge
			Name: James M. Rutledge
			Title: Vice Chairman, President and
			Chief Operating Officer

Accepted as of the date hereof:

Goldman, Sachs & Co.
as Representative


By:	/s/ Michael Hickey
	Name: Michael Hickey
	Title: Vice President

SCHEDULE I

		Number of Optional
		Securities to be
	Total Number of	Purchased if
	Firm Securities	Maximum Option
Underwriter	to be Purchased	Exercised

Goldman, Sachs & Co.	4,183,800	627,570
Merrill Lynch, Pierce, Fenner & Smith Incorporated	1,038,000	155,700
Credit Suisse Securities (USA) LLC	778,200	116,730
Total	6,000,000	900,000

SCHEDULE II

(a) Issuer Free Writing Prospectuses:

Clean Harbors, Inc. Investor Presentation dated November 27, 2012 (electronic form and hard copy)

(b) Additional Documents Incorporated by Reference: None

SCHEDULE III

21.	Alan S. Mckim

22.	Brian Weber

23.	Eric W. Gerstenberg

24.	David M. Parry

25.	James M. Rutledge

26.	Robert Gagnon

ANNEX I

Form of Davis, Malm & D’Agostine, P.C. Opinion

[Note: All references in opinion to subsidiaries of the Company will refer to subsidiaries at the time of delivery of the opinion and will not include Safety-Kleen and its subsidiaries.]

(i) The Company has been duly incorporated and is an existing corporation in good standing under the laws of the Commonwealth of Massachusetts, with corporate power and authority to own its properties and conduct its business as described in the Prospectus. The Company is duly qualified to do business as a foreign corporation in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except where failure to be so qualified or to be in good standing would not individually or in the aggregate have a material adverse effect on the condition (financial or other), business, properties or results of operations of the Company and its subsidiaries taken as a whole.

(ii) Each domestic subsidiary of the Company has been duly incorporated and is an existing corporation in good standing under the laws of the jurisdiction of its incorporation, with power and authority (corporate and other) to own its properties and conduct its business as described in the Prospectus. Each domestic subsidiary of the Company is duly qualified to do business as a foreign corporation in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except where failure to be so qualified or to be in good standing would not individually or in the aggregate have a material adverse effect on the condition (financial or other), business, properties or results of operations of the Company and its subsidiaries taken as a whole. All of the issued and outstanding capital stock of each domestic subsidiary of the Company has been duly authorized and validly issued and is fully paid and nonassessable; and the capital stock of each domestic subsidiary owned by the Company, directly or through subsidiaries, is owned free from liens, encumbrances and defects, except for liens granted under the Company’s Security Agreement (U.S. Domiciled Loan Parties), dated May 31, 2011, between the Company and Bank of America, N.A., as agent.

(iii) The Securities delivered on this Time of Delivery and all other outstanding shares of the Stock of the Company have been duly authorized and validly issued, are fully paid and non-assessable and conform to the description thereof contained in the Prospectus; and the stockholders of the Company have no preemptive rights with respect to the Securities.

(iv) To the best of our knowledge, there are no contracts, agreements or understandings known to us between the Company and any person granting such person the right to require the Company to file a registration statement under the Act with respect to any securities of the Company owned or to be owned by such person or to require the Company to include such securities in the securities registered pursuant to the Registration Statement or in any securities being registered pursuant to any other registration statement filed by the Company under the Act.

(v) The execution, delivery and performance of the Underwriting Agreement and the consummation of the transactions therein contemplated will not result in a breach or violation of any of the terms and provisions of, or constitute a default under or conflict with, any statute, any rule, regulation or order of any governmental agency or body or any court having jurisdiction over the

F-1

Company or any subsidiary of the Company or any of their properties, or any agreement or instrument known to us to which the Company or any such subsidiary is a party or by which the Company or any such subsidiary is bound or to which any of the properties of the Company or any such subsidiary is subject, or the charter or by-laws of the Company or any such subsidiary, and the Company has full power and authority to authorize, issue and sell the Securities as contemplated by the Underwriting Agreement.

(vi) The Registration Statement became effective under the Act as of 4:06 p.m. Eastern Standard Time, on November 26, 2012, the Preliminary Prospectus was filed with the Commission pursuant to Rule 424(b)(5) under the Act on November 26, 2012, and the Prospectus was filed with the Commission pursuant to Rule 424(b)(2) on November [ ], 2012, and, to the best of our knowledge, no stop order suspending the effectiveness of the Registration Statement or any part thereof has been issued and no proceedings for that purpose have been instituted or are pending or contemplated under the Act, and the Registration Statement, the Pricing Prospectus, the Prospectus and each amendment or supplement thereto, as of their respective effective or issue dates (or, in the case of any documents incorporated by reference therein, as of the time they became effective or were filed with the Commission), complied as to form in all material respects with the requirements of the Act and the rules and regulations of the Commission (and in the case of the documents incorporated by reference, the rules and regulations of the Exchange Act). We have no reason to believe (i) that any part of the Registration Statement or any amendment thereto, as of its effective date or as of this Time of Delivery, contained any untrue statement of a material fact or omitted to state any material fact required to be stated therein or necessary to make the statements therein not misleading; (ii) that the Pricing Prospectus, as of the Applicable Time, when taken together with the price to the public and the number of [Firm/Optional Securities] set forth on the cover of the Prospectus, contained any untrue statement of a material fact or omitted to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; or (iii) that the Prospectus or any amendment or supplement thereto, as of its issue date or as of this Time of Delivery, contained any untrue statement of a material fact or omitted to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. The descriptions in the Registration Statement and Prospectus of statutes, legal and governmental proceedings and contracts and other documents are accurate and fairly present the information required to be shown; and we do not know of any legal or governmental proceedings required to be described in the Registration Statement or the Prospectus which are not described as required or of any contracts or documents of a character required to be described in a Registration Statement or the Prospectus or to be filed as exhibits to the Registration Statement which are not described and filed as required; it being understood that we express no opinion as to the financial statements or other financial data contained in the Registration Statement or the Prospectus.

(vii) The Underwriting Agreement has been duly authorized, executed and delivered by the Company.

(viii) To the best of our knowledge and other than as set forth in the Prospectus, there are no legal or governmental proceedings pending to which the Company or any of its subsidiaries is a party or of which any property of the Company or any of its subsidiaries is the subject which, if determined adversely to the Company or any of its subsidiaries, would individually or in the aggregate have a material adverse effect on the current or future consolidated financial position, stockholders’ equity or results of operations of the Company and its subsidiaries; and, to the best of our knowledge, no such proceedings are threatened or contemplated by governmental authorities or threatened by others.

(ix) No consent, approval, authorization, order, registration or qualification of or with any court or governmental agency or body is required for the issue and sale of the Securities or the consummation of the transactions contemplated by the Underwriting Agreement, except such as have been obtained under the Act and such consents, approvals, authorizations, registrations or qualifications as may be required under state securities or Blue Sky laws in connection with the purchase and distribution of the Securities by the Underwriters.

(x) The statements set forth in the Prospectus under the caption “Description of Capital Stock”, insofar as they purport to constitute a summary of the terms of the Stock, under the caption “Certain United States Federal Income and Estate Tax Considerations to Non-U.S. Holders”, and under the caption “Underwriting”, insofar as they purport to describe the provisions of the laws and documents referred to therein, are accurate, complete and fair.

(xi) The Company is not and, after giving effect to the offering and sale of the Securities and the application of the proceeds thereof, will not be an “investment company” or an entity controlled by an “investment company”, as such term is defined in the Investment Company Act.

EX-1.1(B) 3 a12-27731_3ex1d1b.htm EX-1.1(B)

Exhibit 1.1(b)

EXECUTION VERSION

$600,000,000

CLEAN HARBORS, INC.

5.125% Senior Notes due 2021

Purchase Agreement

November 28, 2012

Goldman, Sachs & Co.

Merrill Lynch, Pierce, Fenner & Smith Incorporated

Credit Suisse Securities (USA) LLC
c/o Goldman, Sachs & Co.

200 West Street
New York, New York 10282

Ladies and Gentlemen:

Clean Harbors, Inc., a Massachusetts corporation (the “Company”), proposes, subject to the terms and conditions stated herein, to issue and sell to Goldman, Sachs & Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated and Credit Suisse Securities (USA) LLC (collectively, the “Purchasers”) $600,000,000 aggregate principal amount of the Company’s 5.125% Senior Notes due 2021 (the “Securities”). The Securities will be issued by the Company pursuant to an indenture to be dated as of December 7, 2012 (the “Indenture”), among the Company, the Clean Harbors Guarantors (as defined below) and U.S. Bank National Association, as trustee (the “Trustee”). The Company’s obligations under the Securities, including the due and punctual payment of interest on the Securities, will be, unconditionally guaranteed (the “Guarantees”) by each of the subsidiaries of the Company listed on Schedule II hereto (the “Clean Harbors Guarantors”) at the Time of Delivery (as defined below) and by each of the Safety-Kleen Guarantors (as defined below) on the Acquisition Date (as defined below). Pursuant to an agreement and plan of merger dated as of October 26, 2012 (the “Merger Agreement”) among Safety-Kleen, Inc. (“Safety-Kleen”), the Company and CH Merger Sub, Inc., a wholly owned subsidiary of the Company, CH Merger Sub, Inc. will merge with and into Safety-Kleen with Safety-Kleen being the surviving corporation and a wholly-owned subsidiary of the Company (the “Acquisition” and the date of the consummation of such Acquisition shall herein be referred to the “Acquisition Date”).

On the Acquisition Date, Safety-Kleen and each of its domestic subsidiaries shall become Guarantors (the “Safety-Kleen Guarantors” and together with the Clean Harbors Guarantors, the “Guarantors”) under the Indenture pursuant to a supplemental indenture (the “Supplemental Indenture”) dated as of the Acquisition Date and shall become a party to, and a Guarantor for all purposes of this Agreement and the Registration Rights Agreement on the Acquisition Date pursuant to a joinder agreement to this Agreement substantially in the form of Exhibit A hereto (the

“Purchase Agreement Joinder”) and a joinder agreement to the Registration Rights Agreement (the “Registration Rights Joinder”).

On December 3, 2012, the Company is expected to issue 6,000,000 shares of its common stock (the “Equity Offering”) pursuant to an underwriting agreement dated as of November 27, 2012 among the Company and the Purchasers (the “Underwriting Agreement”).

The Supplemental Indenture, the Purchase Agreement Joinder and the Registration Rights Joinder are collectively referred to herein as the “Acquisition Date Documents.”

1. The Company and the Clean Harbors Guarantors, jointly and severally, represent and warrant to, and agree with each of the Purchasers that (it being understood that references to “the Company and its subsidiaries” in this Section 1 shall be deemed to include Safety-Kleen and its subsidiaries; provided, however, that any representation or warranty made herein by the Company or the Clean Harbors Guarantors relating to Safety-Kleen or any of Safety-Kleen’s subsidiaries is based solely upon (i) the Company’s or the Clean Harbors Guarantors’ actual knowledge based upon their reasonable due diligence in connection with the Acquisition and (ii) the representations and warranties of Safety-Kleen contained in the Merger Agreement and on Safety-Kleen’s related notification obligations contained therein):

(a) A preliminary offering circular, dated November 27, 2012 (the “Preliminary Offering Circular”), and an offering circular, dated November 28, 2012 (the “Offering Circular”), have been prepared in connection with the offering of the Securities. The Preliminary Offering Circular, as amended and supplemented immediately prior to the Applicable Time (as defined in Section 1(b)), is hereinafter referred to the “Pricing Circular.” Any reference to the Preliminary Offering Circular, the Pricing Circular or the Offering Circular shall be deemed to refer to and include any documents or information incorporated by reference therein (the “Incorporated Documents”) filed with the United States Securities and Exchange Commission (the “Commission”) pursuant to the United States Securities Exchange Act of 1934, as amended (the “Exchange Act”), and any reference to the Preliminary Offering Circular or the Offering Circular, as the case may be, as amended or supplemented, as of any specified date, shall be deemed to include any Additional Issuer Information (as defined in Section 5(f)) furnished by the Company prior to the completion of the distribution of the Securities. The Incorporated Documents, when they were filed with the Commission, conformed in all material respects to the applicable requirements of the Exchange Act and the applicable rules and regulations of the Commission thereunder. The Preliminary Offering Circular, the Offering Circular and any amendments or supplements thereto and the Incorporated Documents did not and will not, as of their respective dates, contain an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by a Purchaser through Goldman, Sachs & Co. expressly for use therein;

(b) For the purposes of this Agreement, the “Applicable Time” means 4.11 p.m. (Eastern Time), on the date of this Agreement; the Pricing Circular as supplemented

by the information set forth in Schedule III hereto, taken together (collectively, the “Pricing Disclosure Package”) as of the Applicable Time, did not include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; and each Company Supplemental Disclosure Document (as defined in Section 6(a)) listed on Schedule I attached hereto does not conflict with the information contained in the Pricing Circular or the Offering Circular and each such Company Supplemental Disclosure Document, as supplemented by and taken together with the Pricing Disclosure Package as of the Applicable Time, did not include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to statements or omissions made in the Pricing Disclosure Package or a Company Supplemental Disclosure Document in reliance upon and in conformity with information furnished in writing to the Company by a Purchaser through Goldman, Sachs & Co. expressly for use therein;

(c) Neither the Company nor any of its subsidiaries has sustained since the date of the latest audited financial statements included or incorporated by reference in the Pricing Circular any material loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, otherwise than as set forth or contemplated in the Pricing Circular; and, since the respective dates as of which information is given in the Pricing Circular, there has not been any change in the capital stock or long term debt of the Company or any of its subsidiaries or any material adverse change, or any development reasonably expected to result in a Material Adverse Effect (as defined in Section 1(l)), otherwise than as set forth or contemplated in the Pricing Circular;

(d) The Company and its subsidiaries have good and marketable title in fee simple to all real property and good and marketable title to all personal property owned by them, in each case free and clear of all liens, encumbrances and defects except such as are described in the Pricing Circular or such as do not materially affect the value of such property and do not interfere with the use made and proposed to be made of such property by the Company and its subsidiaries; and any real property and buildings held under lease by the Company and its subsidiaries are held by them under valid, subsisting and enforceable leases with such exceptions as are not material and do not interfere with the use made and proposed to be made of such property and buildings by the Company and its subsidiaries;

(e) The Company has been duly incorporated and is validly existing as a corporation in good standing under the laws of Massachusetts, with power and authority (corporate and other) to own its properties and conduct its business as described in the Pricing Circular, and has been duly qualified as a foreign corporation for the transaction of business and is in good standing under the laws of each other jurisdiction in which it owns or leases properties or conducts any business so as to require such qualification, or is subject to no material liability or disability by reason of any failure to be so qualified or in good standing in any such jurisdiction; and each subsidiary of the Company has been duly incorporated or organized and is validly existing as a corporation or other entity in

good standing under the laws of its jurisdiction of incorporation or organization, or subject to no material liability or disability by reason of any failure to be in good standing;

(f) The Company has an authorized capitalization as set forth in the Pricing Circular and all of the issued shares of capital stock of the Company have been duly and validly authorized and issued and are fully paid and non-assessable; and all of the issued and outstanding shares of capital stock or other equity interests of each subsidiary of the Company have been duly and validly authorized and issued, are fully paid and non-assessable and (except for directors’ qualifying shares and certain minority interests in foreign subsidiaries) are owned directly or indirectly by the Company, free and clear of all liens, encumbrances, equities or claims;

(g) The Securities have been duly and validly authorized and, when issued and delivered as provided in the Indenture against payment therefor as provided herein, will be duly and validly issued, conform to the description of the Securities in the Pricing Disclosure Package and the Offering Circular and constitute valid and legally binding obligations against the Company enforceable against the Company in accordance with their terms (in each case subject, as to the enforcement of remedies, to the effects of (x) applicable bankruptcy, reorganization, insolvency, fraudulent conveyance, moratorium and similar laws affecting creditors’ rights generally from time to time in effect, (y) the exercise of judicial discretion based on general principles of equity (whether considered in a proceeding in equity or at law) and (z) an implied covenant of good faith and fair dealing (collectively, the “Enforceability Limitations”)), and be entitled to the benefits of the Indenture;

(h) (i) The Registration Rights Agreement to be dated as of December 7, 2012 (the “Registration Rights Agreement”), which will be substantially in the form previously delivered to you, has been duly authorized and, as of the Time of Delivery, will have been duly executed and delivered by the Company and the Clean Harbors Guarantors, and will constitute a valid and legally binding instrument enforceable against the Company and the Clean Harbors Guarantors in accordance with its terms, subject to the Enforceability Limitations, and will conform to the descriptions thereof in the Pricing Disclosure Package and the Offering Circular, and (ii) on the Acquisition Date the Registration Rights Joinder will have been duly authorized, executed and delivered by the Safety-Kleen Guarantors, and will constitute a valid and legally binding instrument enforceable against the Safety-Kleen Guarantors in accordance with its terms, subject to the Enforceability Limitations, and in each case,

(i) The issue and sale of the Securities and the compliance by the Company and the Guarantors, as applicable, with all of the provisions of the Securities, the Indenture, the Supplemental Indenture, the Registration Rights Agreement, the Registration Rights Joinder, this Agreement, and the Purchase Agreement Joinder and the consummation of the transactions herein and therein contemplated will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Company or any of its subsidiaries is a party (including the indenture relating to the Company’s 5.25% Senior Notes due 2020 (the “Existing Notes”) and the Company’s

$250,000,000 senior secured asset based revolving credit facility with Bank of America, N.A., as agent) or by which the Company or any of its subsidiaries is bound or to which any of the property or assets of the Company or any of its subsidiaries is subject, nor will such action result in any violation of the provisions of the Articles of Organization or By-laws of the Company or any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any of its subsidiaries or any of their properties; and no consent, approval, authorization, order, registration or qualification of or with any such court or governmental agency or body is required for the execution by the Company or any Guarantor of, or the consummation by the Company or any Guarantor of the transactions contemplated by, this Agreement, the Purchase Agreement Joinder, the Registration Rights Agreement, the Registration Rights Joinder, the Indenture, or the Supplemental Indenture (including, without limitation, the issuance and sale of the Securities), except (i) such as have been obtained under the Securities Act of 1933, as amended (the “Act”), and such consents, approvals, authorizations, registrations or qualifications as may be required under state securities or Blue Sky laws in connection with the purchase and distribution of the Securities by the Purchasers; (ii) the order of the Commission declaring the Exchange Offer Registration Statement (as defined in the Registration Rights Agreement) or the Shelf Registration Statement (as defined in the Registration Rights Agreement) effective; and (iii) as have been obtained or made prior to the Applicable Time;

(j) Neither the Company nor any of its subsidiaries is in violation of its Articles of Organization (or other similar charter document) or By-laws or in default in the performance or observance of any material obligation, covenant or condition contained in any indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument to which it is a party or by which it or any of its properties may be bound;

(k) The statements set forth in the Pricing Circular under the caption “Description of the Notes,” insofar as they purport to constitute a summary of the terms of the Securities, and under the captions “Certain United States Federal Income and Estate Tax Considerations” and “Plan of Distribution,” insofar as they purport to describe the provisions of the laws and documents referred to therein, are accurate and fair; and the statements set forth in the Offering Circular under the caption “Description of the Notes,” insofar as they purport to constitute a summary of the terms of the Securities, and under the captions “Certain United States Federal Income and Estate Tax Considerations” and “Plan of Distribution,” insofar as they purport to describe the provisions of the laws and documents referred to therein, are accurate and fair;

(l) Other than as set forth in the Pricing Circular, there are no legal or governmental proceedings pending to which the Company or any of its subsidiaries is a party or of which any property of the Company or any of its subsidiaries is the subject which, if determined adversely to the Company or any of its subsidiaries, would, individually or in the aggregate, be reasonably expected to result in a material adverse effect on the current or future financial position, stockholders’ equity or results of operations of the Company and its subsidiaries (a “Material Adverse Effect”); and, to the best of the Company’s knowledge, no such proceedings are threatened or contemplated by governmental authorities or threatened by others;

(m) When the Securities are issued and delivered pursuant to this Agreement and the Indenture, the Securities will not be of the same class (within the meaning of Rule 144A under the Act) as securities which are listed on a national securities exchange registered under Section 6 of the Exchange Act or quoted in a U.S. automated inter-dealer quotation system;

(n) None of the Company and the Guarantors is and, after giving effect to the offering and sale of the Securities and the application of the proceeds thereof, none of them will be an “investment company” or an entity controlled by an “investment company,” as such term is defined in the Investment Company Act of 1940, as amended (the “Investment Company Act”);

(o) Deloitte & Touche LLP, who have audited certain financial statements of the Company and its subsidiaries (excluding Safety-Kleen and its subsidiaries) and the Company’s internal control over financial reporting and management’s assessment thereof, are independent public accountants as required by the Act and the rules and regulations of the Commission thereunder;

(p) To the knowledge of the Company, KPMG LLP, who have audited certain consolidated financial statements of Safety-Kleen and its subsidiaries are independent certified public accountants under rule 101 of the AICPA Code of Professional Conduct and its interpretations and rulings, and under the relevant standards of the Public Company Accounting Oversight Board (United States) (PCAOB);

(q) Neither the Company nor any person acting on its behalf has offered or sold the Securities by means of any general solicitation or general advertising within the meaning of Rule 502(c) under the Act or, with respect to Securities sold outside the United States to non-U.S. persons (as defined in Rule 902 under the Act), by means of any directed selling efforts within the meaning of Rule 902 under the Act and the Company, any affiliate of the Company and any person acting on its or their behalf has complied with and will implement the “offering restriction” within the meaning of such Rule 902 in connection with any such sale outside the United States;

(r) Within the preceding six months, neither the Company nor any other person acting on behalf of the Company has offered or sold to any person any Securities, or any securities of the same or a similar class as the Securities, other than Securities offered or sold to the Purchasers hereunder and the Existing Notes. The Company will take reasonable precautions designed to insure that any offer or sale, direct or indirect, in the United States or to any U.S. person (as defined in Rule 902 under the Act) of any Securities or any substantially similar security issued by the Company, within six months subsequent to the date on which the distribution of the Securities has been completed (as notified to the Company by Goldman, Sachs & Co.), is made under restrictions and other circumstances reasonably designed not to affect the status of the offer and sale of the Securities in the United States and to U.S. persons contemplated by this Agreement as transactions exempt from the registration provisions of the Act;

(s) The Company maintains a system of internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Exchange Act) that complies with the requirements of the Exchange Act and has been designed by the Company’s principal executive officer and principal financial officer, or under their supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. Except as described in the Pricing Circular, the Company’s internal control over financial reporting is effective and the Company is not aware of any material weaknesses in its internal control over financial reporting;

(t) Since the date of the latest audited financial statements included or incorporated by reference in the Pricing Circular, except as described in the Pricing Circular, there has been no change in the Company’s internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting;

(v) There are no contracts, agreements or understandings between the Company and any person that would give rise to a valid claim against the Company, any of its subsidiaries or any Purchaser for a brokerage commission, finder’s fee or other like payment in connection with the offering of the Securities;

(w) On and immediately after the Time of Delivery, the Company and each of the Clean Harbors Guarantors (after giving effect to the issuance of the Securities and the other transactions related thereto as described in the Pricing Circular and the Offering Circular) will be Solvent. On the Acquisition Date, and after giving effect to the Acquisition, the Company and each of the Guarantors will be Solvent. As used in this paragraph, the term “Solvent” means, with respect to any person as of a particular date, that on such date (i) the present fair market value (or present fair saleable value) of the assets of such person is not less than the total amount required to pay the liabilities of such person on its total existing debts and liabilities (including contingent liabilities) as they become absolute and matured; (ii) such person is able to realize upon its assets and pay its debts and other liabilities, contingent obligations and commitments as they mature and become due in the normal course of business; (iii) assuming consummation of the issuance of the Securities as contemplated by this Agreement, the Pricing Circular and the Offering Circular, such person is not incurring debts or liabilities beyond its ability to pay as such debts and liabilities mature; (iv) such person is not engaged in any business or transaction, and does not propose to engage in any business or transaction, for which its property would constitute unreasonably small capital after giving due consideration to the prevailing

practice in the industry in which such person is engaged; and (v) such person is not a defendant in any civil action that would be reasonably expected to result in a judgment that the Company is or would become unable to satisfy;

(x) Neither the issuance, sale and delivery of the Securities and, when issued, the Guarantees, nor the application of the proceeds thereof by the Company as described in the Offering Circular will violate Regulation T, U or X of the Board of Governors of the Federal Reserve System or any other regulation of such Board of Governors, as the same is in effect at the Time of Delivery;

(y) Prior to the date hereof, neither the Company nor any of its affiliates has taken any action which is designed to or which has constituted or which might have been expected to cause or result in stabilization or manipulation of the price of any security of the Company in connection with the offering of the Securities;

(z) (i) This Agreement has been duly authorized, executed and delivered by the Company and each Clean Harbors Guarantor; (ii) the Indenture has been duly authorized by the Company and each Clean Harbors Guarantor and at the Time of Delivery , will be duly executed and delivered by the Company and each Clean Harbors Guarantor and, assuming the due authorization, execution and delivery by the Trustee, will constitute a legally valid and binding instrument enforceable against the Company and each Clean Harbors Guarantor in accordance with its terms, in each case subject to the Enforceability Limitations; (iii) the Securities have been duly authorized by the Company and, when executed and authenticated by the Trustee in accordance with the provisions of the Indenture and delivered to and paid for by the Purchasers, will be duly executed and delivered by the Company, constitute the legal, valid and binding obligations of the Company, subject to the Enforceability Limitations, and be entitled to the benefits of the Indenture; and (iv) the Guarantees have been duly authorized by each Clean Harbors Guarantor and, at the Time of Delivery when duly executed and delivered by all parties thereto, will constitute the legal, valid and binding obligations of each of the Clean Harbors Guarantors, enforceable against each of the Clean Harbors Guarantors in accordance with their terms and entitled to the benefits of the Indenture, subject to the Enforceability Limitations;

(aa) The Supplemental Indenture shall have been duly authorized by the Company and on the Acquisition Date will have been duly authorized by the Safety-Kleen Guarantors and, when duly executed and delivered by the Company and the Safety-Kleen Guarantors on the Acquisition Date (assuming the due authorization, execution and delivery thereof by the Trustee) will constitute a valid and legally binding agreement of the Company and the Safety-Kleen Guarantors in accordance with its terms subject to the Enforceability Limitations, (ii) the Guarantees by each of the Safety-Kleen Guarantors on or prior to the Acquisition Date shall have been duly authorized by each of the Safety-Kleen Guarantors and when the Supplemental Indenture has been duly executed and delivered by each of the parties thereto as provided in the Indenture, the Guarantees of the Safety-Kleen Guarantors pursuant to the Indenture and the Supplemental Indenture will be valid and legally binding obligations of each of the Safety-Kleen Guarantors subject to the Enforceability Limitations, (iii) on the Acquisition Date, the Purchase Agreement

Joinder will have been duly authorized, executed and delivered by each of the Safety-Kleen Guarantors

(bb) The Company and its subsidiaries possess adequate certificates, authorities or permits issued by appropriate governmental agencies or bodies necessary to conduct the business now operated by them and have not received any notice of proceedings relating to the revocation or modification of any such certificate, authority or permit that, if determined adversely to the Company or any of its subsidiaries, would, individually or in the aggregate, be reasonably expected to result in a Material Adverse Effect;

(cc) No labor dispute with the employees of the Company or any subsidiary exists or, to the knowledge of the Company, is imminent that would, individually or in the aggregate, be reasonably expected to result in a Material Adverse Effect;

(dd) The Company and its subsidiaries own, possess or can acquire on reasonable terms, adequate trademarks, trade names and other rights to inventions, know-how, patents, copyrights, confidential information and other intellectual property (collectively, “intellectual property rights”) necessary to conduct the business now operated by them, or presently employed by them, and have not received any notice of infringement of or conflict with asserted rights of others with respect to any intellectual property rights that, if determined adversely to the Company or any of its subsidiaries, would, individually or in the aggregate, be reasonably expected to result in a Material Adverse Effect;

(ee) Except as disclosed in the Pricing Circular and as would not, individually or in the aggregate, be reasonably expected to result in a Material Adverse Effect, (A) each of the Company and its subsidiaries is in compliance with, and not subject to liability under, Environmental Law (as defined below), (B) each of the Company and its subsidiaries has made all filings, and provided all financial assurances and notices, required under Environmental Law, and has, and is in compliance with, all permits required under Environmental Law and each of them is in full force and effect, (C) there is no civil, criminal or administrative action, suit, demand, claim, hearing, written notice of violation, proceeding, notice or demand letter or written request for information pending or, to the knowledge of the Company, threatened, or, to the knowledge of the Company, investigation threatened or pending, against the Company or any of its subsidiaries under Environmental Law, (D) no lien, charge, encumbrance or restriction has been recorded under any Environmental Law with respect to any asset, facility or property owned, operated, leased or controlled by the Company or any of its subsidiaries, (E) neither the Company nor any of its subsidiaries has received notice that it has been identified as a potentially responsible party under the Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended (“CERCLA”), or any comparable Environmental Law, (F) no property or facility of the Company or any of its subsidiaries is (i) listed or proposed for listing on the National Priorities List promulgated pursuant to CERCLA, (ii) listed in the Comprehensive Environmental Response, Compensation and Liability Information System List promulgated pursuant to CERCLA, or (iii) listed on any comparable list of sites known or suspected to be contaminated with Hazardous Material (as defined below) as maintained by any governmental authority, (G) neither the Company nor any of its subsidiaries is conducting or financing an investigation, or response, corrective

or other action pursuant to Environmental Law at any site or facility, nor is any of them subject to or party to any order, judgment, decree, contract or agreement which obligates it to conduct or finance any such action nor has any of them assumed by contract or agreement or otherwise any obligation or liability under Environmental Law, and (H) there are no past or present events, activities, operations, occurrences or conditions which could reasonably be expected to prevent or interfere with compliance by the Company or any of its subsidiaries with, or result in liability of any of them under, Environmental Law (including, without limitation, any capital or operating expenditures required for cleanup, closure or compliance with Environmental Law, any constraints on operating activities and any potential liability to third parties);

(ff) (i) The financial statements of the Company and its consolidated subsidiaries (excluding the Safety-Kleen Guarantors) included in the Pricing Circular and the Offering Circular present fairly the financial position of the Company and its consolidated subsidiaries as of the dates shown and their results of operations and cash flows for the periods shown and, except as otherwise disclosed in the Pricing Circular and the Offering Circular, such financial statements have been prepared in conformity with the generally accepted accounting principles in the United States applied on a consistent basis; (ii) to the knowledge of the Company, financial statements of Safety-Kleen and its consolidated subsidiaries included in the Pricing Circular and the Offering Circular present fairly the financial position of the Safety-Kleen and its consolidated subsidiaries as of the dates shown and their results of operations and cash flows for the periods shown and, except as otherwise disclosed in the Pricing Circular and the Offering Circular, such financial statements have been prepared in conformity with the generally accepted accounting principles in the United States applied on a consistent basis; (iii) the pro forma financial information and the related notes thereto included in the Pricing Circular and the Offering Circular have been prepared in accordance with the applicable requirements of the Act and the assumptions underlying such pro forma financial information are reasonable and are set forth in the Pricing Circular and the Offering Circular; and (iv) the interactive data

in eXtensible Business Reporting Language included or incorporated by reference in the Pricing Circular and the Offering Circular present fairly the information called for in all material respects and has been prepared in accordance with the Commission’s rules and guidelines applicable thereto.

(gg) The Company is subject to the reporting requirements of either Section 13 or Section 15(d) of the Exchange Act and files reports with the Commission on the Next — Generation Electronic Data Gathering, Analysis, and Retrieval (EDGAR) system (“EDGAR”);

(hh) Neither the Company nor any of its subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee or affiliate of the Company or any of its subsidiaries is aware of or has taken any action, directly or indirectly, that would result in a violation by such persons of the Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations thereunder (the “FCPA”), including, without limitation, making use of the mails or any means or instrumentality of interstate commerce corruptly in furtherance of an offer, payment, promise to pay or authorization of the payment of any money, or other property, gift, promise to give, or authorization of the giving of anything of value to any “foreign official” (as such term is defined in the FCPA) or any foreign political party or official thereof or any candidate for foreign political office, in contravention of the FCPA and the Company, its subsidiaries and, to the knowledge of the Company, its affiliates have conducted their businesses in compliance with the FCPA and have instituted and maintain policies and procedures designed to ensure, and which are reasonably expected to continue to ensure, continued compliance therewith;

(ii) The operations of the Company and its subsidiaries are and have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the money laundering statutes of all applicable jurisdictions, the rules and regulations thereunder and any related or similar rules, regulations or guidelines issued, administered or enforced by any governmental agency (collectively, the “Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the best knowledge of the Company, threatened; and

(jj) Neither the Company nor any of its subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee or affiliate of the Company or any of its subsidiaries is currently subject to any U.S. sanctions administered by the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”); and the Company will not directly or indirectly use the proceeds of the offering, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity, for the purpose of financing the activities of any person currently subject to any U.S. sanctions administered by OFAC.

2. Subject to the terms and conditions herein set forth, the Company agrees to sell to each of the Purchasers, and each of the Purchasers agree, severally and not jointly, to purchase

from the Company, the principal amount of the Securities set forth opposite the name of such Purchaser on Schedule V hereto at the purchase price set forth on Schedule IV hereto.

3. Upon the authorization by you of the release of the Securities, the several Purchasers propose to offer the Securities for sale upon the terms and conditions set forth in this Agreement and the Offering Circular and each Purchaser severally hereby represents and warrants to, and agrees with the Company that:

(a) It will offer and sell the Securities only to persons who it reasonably believes are “qualified institutional buyers” (“QIBs”) within the meaning of Rule 144A under the Act in transactions meeting the requirements of Rule 144A or (ii) upon the terms and conditions set forth in Annex II to this Agreement;

(b) It is an Institutional Accredited Investor; and

(c) It will not offer or sell the Securities by any form of general solicitation or general advertising, including but not limited to the methods described in Rule 502(c) under the Act.

4. (a) The Securities to be purchased by each Purchaser hereunder will be represented by one or more definitive global Securities in book-entry form which will be deposited by or on behalf of the Company with The Depository Trust Company (“DTC”) or its designated custodian. The Company will deliver the Securities to Goldman, Sachs & Co., for the account of each Purchaser, against payment by or on behalf of each Purchaser of the purchase price therefor by wire transfer in Federal (same day) funds, by causing DTC to credit the Securities to the account of Goldman, Sachs & Co. at DTC. The Company will cause the certificates representing the Securities to be made available to Goldman, Sachs & Co. for checking at least twenty-four hours prior to the Time of Delivery (as defined below) at the office of Cahill Gordon & Reindel LLP, 80 Pine St., New York, New York 10005 (the “Closing Location”). The time and date of such delivery and payment shall be 9:30 a.m., New York City time, on December 7, 2012 or such other time and date as Goldman, Sachs & Co. and the Company may agree upon in writing. Such time and date are herein called the “Time of Delivery.”

(b) The documents to be delivered at the Time of Delivery by or on behalf of the parties hereto pursuant to Section 8 hereof, including the cross-receipt for the Securities and any additional documents requested by the Purchasers pursuant to Section 8 hereof, will be delivered at such time and date at the Closing Location, and the Securities will be delivered at DTC or its designated custodian, all at the Time of Delivery. A meeting will be held at the Closing Location at 3:00 p.m., New York City time, on the New York Business Day next preceding the Time of Delivery, at which meeting the final drafts of the documents to be delivered pursuant to the preceding sentence will be available for review by the parties hereto. For the purposes of this Section 4, “New York Business Day” shall mean each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in New York are generally authorized or obligated by law or executive order to close.

5. The Company agrees with each of the Purchasers:

(a) To prepare the Offering Circular in a form approved by you; to make no amendment or any supplement to the Offering Circular which shall be disapproved by you promptly after reasonable notice thereof; and to furnish you with copies thereof;

(b) Promptly from time to time to take such action as you may reasonably request to qualify the Securities for offering and sale under the securities laws of such jurisdictions as you may request and to comply with such laws so as to permit the continuance of sales and dealings therein in such jurisdictions for as long as may be necessary to complete the distribution of the Securities, provided that in connection therewith the Company shall not be required to qualify as a foreign corporation or to file a general consent to service of process in any jurisdiction;

(c) Prior to 10:00 a.m., New York City time, on the New York Business Day next succeeding the date of this Agreement and from time to time, to furnish the Purchasers with written and electronic copies of the Offering Circular in New York City in such quantities as you may reasonably request, and, if the delivery of an amended or supplemental Offering Circular is required at any time prior to the expiration of nine months after the time of issue of the Offering Circular in connection with the offering or sale of the Securities and if at such time any event shall have occurred as a result of which the Offering Circular as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made when such Offering Circular is delivered, not misleading, or, if for any other reason it shall be necessary during such same period to amend or supplement the Offering Circular, to notify you and upon your request to prepare and furnish without charge to each Purchaser and to any dealer in securities as many written and electronic copies as you may from time to time reasonably request of an amended Offering Circular or a supplement to the Offering Circular which will correct such statement or omission or effect such compliance;

(d) During the period beginning from the date hereof and continuing to and including the date 90 days after the date of the Offering Circular, not to offer, sell, contract to sell, pledge, grant any option to purchase, make any short sale or otherwise dispose, except as provided hereunder, of any securities of the Company that are substantially similar to the Securities, without your prior written consent;

(e) Not to be or become, at any time prior to the expiration of two years after the Time of Delivery, an open-end investment company, unit investment trust, closed-end investment company or face-amount certificate company that is or is required to be registered under Section 8 of the Investment Company Act;

(f) At any time when the Company is not subject to Section 13 or 15(d) of the Exchange Act, for the benefit of holders from time to time of Securities, to furnish at its expense, upon request, to holders of Securities and prospective purchasers of securities information (the “Additional Issuer Information”) satisfying the requirements of subsection (d)(4)(i) of Rule 144A under the Act;

(g) Except for such documents that are publicly available on EDGAR, to furnish to the holders of the Securities as soon as practicable after the end of each fiscal year an annual report (including a balance sheet and statements of income, stockholders’ equity and cash flows of the Company and its consolidated subsidiaries certified by independent public accountants) and, as soon as practicable after the end of each of the first three quarters of each fiscal year (beginning with the fiscal quarter ending after the date of the Offering Circular), to make available to its stockholders consolidated summary financial information of the Company and its subsidiaries for such quarter in reasonable detail;

(h) To use the net proceeds received by it from the sale of the Securities pursuant to this Agreement in the manner specified in the Pricing Circular under the caption “Use of Proceeds”; and

(i) During the period of two years after the Time of Delivery, the Company will not and will not permit any of its “affiliates” (as defined in Rule 144 under the Act) to, resell any of the Securities which constitute “restricted securities” under Rule 144 that have been reacquired by any of them.

(j) To cause to be delivered on the Acquisition Date to Goldman, Sachs & Co, (x) copies of the executed Acquisition Date Documents, (y) one or more opinions of counsel to the Company (including local counsel in certain jurisdictions where a Safety-Kleen Guarantor is incorporated or formed) reasonably satisfactory to Cahill Gordon & Reindel LLP and (z) and such information and documents as Cahill Gordon & Reindel LLP may reasonably require in connection with the execution of the Acquisition Date Documents.

6. (a) The Company represents and agrees that, without the prior consent of Goldman, Sachs & Co., it has not made and will not make any offer relating to the Securities that, if the offering of the Securities contemplated by this Agreement were conducted as a public offering pursuant to a registration statement filed under the Act with the Commission, would constitute an “issuer free writing prospectus,” as defined in Rule 433 under the Act (any such offer is hereinafter referred to as a “Company Supplemental Disclosure Document”);

(b) The Company has complied and will comply with the requirements of Rule 433 under the Act applicable to any Company Supplemental Disclosure Document;

(c) The Company agrees that if at any time following issuance of a Company Supplemental Disclosure Document any event occurred or occurs as a result of which such Company Supplemental Disclosure Document would conflict with the information in the Pricing Circular or the Offering Circular or would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances then prevailing, not misleading, the Company will give prompt notice thereof to Goldman, Sachs & Co. and, if requested by Goldman, Sachs & Co., will prepare and furnish without charge to each Purchaser a Company Supplemental Disclosure Document or other document which will correct such conflict, statement or omission; provided, however, that this representation and warranty shall not apply to any statements or omissions in a Company Supplemental

Disclosure Document made in reliance upon and in conformity with information furnished in writing to the Company by a Purchaser through Goldman, Sachs & Co. expressly for use therein;

(d) Each Purchaser severally represents and agrees that, without the prior consent of the Company, other than one or more term sheets relating to the Securities containing customary information and conveyed to purchasers of securities, it has not made and will not make any offer relating to the Securities that, if the offering of the Securities contemplated by this Agreement were conducted as a public offering pursuant to a registration statement filed under the Act with the Commission, would constitute a “free writing prospectus,” as defined in Rule 405 under the Act (any such offer (other than any such term sheets), is hereinafter referred to as a “Purchaser Supplemental Disclosure Document”); and

(e) Any Company Supplemental Disclosure Document or Purchaser Supplemental Disclosure Document the use of which has been consented to by the Company and Goldman, Sachs & Co. is listed on Schedule I attached hereto.

7. The Company covenants and agrees with the several Purchasers that the Company will pay or cause to be paid the following: (i) the fees, disbursements and expenses of the Company’s counsel and accountants in connection with the issue of the Securities and all other expenses in connection with the preparation, printing, reproduction and filing of the Indenture, the Registration Rights Agreement, the Registration Rights Joinder, the Supplemental Indenture, any Company Supplemental Disclosure Document, the Preliminary Offering Circular and the Offering Circular and any amendments and supplements thereto and the mailing and delivering of copies thereof to the Purchasers and dealers; (ii) the cost of printing or producing this Agreement, the Purchase Agreement Joinder, the Indenture, the Supplemental Indenture, the Registration Rights Agreement, the Registration Rights Joinder, the Blue Sky Memorandum, closing documents (including any compilations thereof) and any other documents in connection with the offering, purchase, sale and delivery of the Securities; (iii) all expenses in connection with the qualification of the Securities for offering and sale under state securities laws as provided in Section 5(b) hereof, including the fees and disbursements of counsel for the Purchasers in connection with such qualification and in connection with the Blue Sky and legal investment surveys; (iv) the cost of preparing the Securities; (v) the cost and charges of any transfer agent or registrar; (vi) any fees charged by rating agencies for rating the Securities; (vii) the fees and expenses of the Trustee and any paying agent (including related fees and expenses of any counsel to such party); and (viii) all other costs and expenses incident to the performance of its obligations hereunder which are not otherwise specifically provided for in this Section. It is understood, however, that, except as provided in this Section and Sections 9 and 12, the Purchasers will pay all of their own costs and expenses, including the fees of their counsel, transfer taxes on resale of any of the Securities by them, and any advertising expenses connected with any offers they may make.

8. The obligations of the Purchasers hereunder, as to the Securities to be delivered at the Time of Delivery, shall be subject, in their discretion, to the condition that all representations and warranties and other statements of the Company herein are, at and as of the Time of Delivery, true and correct, the condition that the Company shall have performed all of its obligations hereunder theretofore to be performed, and the following additional conditions:

(a) Cahill Gordon & Reindel LLP, counsel for the Purchasers, shall have furnished to the Purchasers such written opinion or opinions, dated the Time of Delivery, in form and substance satisfactory to the Purchasers, and such counsel shall have received such papers and information as they may reasonably request to enable them to pass upon such matters;

(b) (i) Herrick, Feinstein LLP, special counsel in the State of New York to the Company and the Clean Harbors Guarantors, shall have furnished to the Purchasers such written opinion or opinions, dated the Time of Delivery, in form and substance substantially similar to the opinion dated July 30, 2012 delivered by Herrick Feinstein LLP in connection with the Company’s 5.25% Senior Notes due 2020; and (ii) Davis, Malm & D’Agostine, P.C., counsel for the Company, shall have furnished to the Purchasers their written opinion, dated the Time of Delivery, in form and substance satisfactory to the Purchasers, to the effect that:

(i) The Company has been duly incorporated and is an existing corporation in good standing under the laws of the Commonwealth of Massachusetts, with corporate power and authority to own its properties and conduct its business as described in the Offering Circular. The Company is duly qualified to do business as a foreign corporation in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except where failure to be so qualified or to be in good standing would not individually or in the aggregate have a material adverse effect on the condition (financial or other), business, properties or results of operations of the Company and its subsidiaries taken as a whole;

(ii) Each Clean Harbors Guarantor has been duly incorporated or organized, as applicable, and is an existing corporation or other entity, as applicable, in good standing under the laws of the jurisdiction of its incorporation or organization, with power and authority (corporate or other) to own its properties and conduct its business as described in the Offering Circular. Each Clean Harbors Guarantor is duly qualified to do business as a foreign corporation or other entity in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except where failure to be so qualified or to be in good standing would not individually or in the aggregate have a material adverse effect on the condition (financial or other), business, properties or results of operations of the Company and its subsidiaries taken as a whole. All of the issued and outstanding capital stock or other equity interests of each Guarantor has been duly authorized and validly issued and is fully paid and non-assessable;

(iii) The execution, delivery and performance of this Agreement and the consummation of the transactions herein contemplated will not result in a breach or violation of any of the terms and provisions of, or constitute a default under or conflict with, any statute, rule, regulation or order of any governmental agency or body or any court having jurisdiction over the Company or any Clean Harbors Guarantor or any of their properties, or any agreement or instrument known to us to which the Company or any Clean Harbors Guarantor is a party or by which the Company or any Clean Harbors Guarantor is bound or to which any of the properties of the Company or any Clean Harbors Guarantor is subject,

or the charter, by-laws or other organizational documents of the Company or any Clean Harbors Guarantor. The Company has full power and authority to authorize, issue and sell the Securities as contemplated by this Agreement;

(iv) This Agreement has been duly authorized, executed and delivered by the Company and each Clean Harbors Guarantor;

(v) The Securities have been duly and validly authorized and, when issued and delivered as provided in the Indenture against payment therefor as provided in this Agreement, will be duly and validly issued, conform to the description of the Securities in the Offering Circular, constitute valid and legally binding obligations of the Company enforceable against the Company in accordance with their terms (in each case subject to the Enforceability Limitations), and will be entitled to the benefits of the Indenture;

(vi) The Indenture has been duly and validly authorized by the Company and the Clean Harbors Guarantors, conforms to the description thereof in the Offering Circular, constitutes the valid and legally binding obligation of the Company and the Clean Harbors Guarantors enforceable against the Company and the Clean Harbors Guarantors in accordance with its terms, in each case subject to the Enforceability Limitations, and meets the requirements for qualification under the Trust Indenture Act;

(vii) The Registration Rights Agreement has been duly authorized, executed and delivered by the Company and the Clean Harbors Guarantors, and constitutes a valid and legally binding instrument enforceable against the Company and the Clean Harbors Guarantors in accordance with its terms, subject to the Enforceability Limitations;

(viii) The Guarantees have been duly and validly authorized by the Clean Harbors Guarantors and, when the Securities are issued and delivered as provided in the Indenture against payment therefor as provided in this Agreement, the Guarantees will be duly and validly issued by the Clean Harbors Guarantors, conform to the description thereof in the Offering Circular, and constitute valid and legally binding obligations of the Clean Harbors Guarantors enforceable against the Clean Harbors Guarantors in accordance with their terms, in each case subject to the Enforceability Limitations;

(ix) No consent, approval, authorization, order, registration or qualification of or with any court or governmental agency or body is required for the execution by the Company or any Guarantor of, or the consummation by the Company or any Clean Harbors Guarantor of the transactions contemplated by, this Agreement or the Indenture (including, without limitation, the issuance and sale of the Securities), except (i) such as have been obtained under the Act and such consents, approvals, authorizations, registrations or qualifications as may be required under state securities or Blue Sky laws in connection with the purchase and distribution of the Securities by the Purchasers; (ii) the order of the Commission declaring the Exchange Offer Registration Statement or the Shelf Registration Statement contemplated by the Registration Rights Agreement effective; and (iii) as have been obtained or made prior to the Time of Delivery;

(x) Assuming the accuracy of each Purchasers’ representations set forth in Section 3 of this Agreement, no registration of the Securities under the Act, and no qualification of an indenture under the Trust Indenture Act with respect thereto, is required for the offer and sale of the Securities to, and initial resale of the Securities by, the Purchasers in the manner contemplated by this Agreement;

(xi) The statements set forth in the Offering Circular under the caption “Description of the Notes,” insofar as they purport to constitute a summary of the terms of the Securities, and under the captions “Certain United States Federal Income and Estate Tax Considerations” and “Plan of Distribution,” insofar as they purport to describe the provisions of the laws and documents referred to therein, are accurate and fair; and

(xii) Neither the Company nor any of the Clean Harbors Guarantors is and, after giving effect to the offering and sale of the Securities and the application of the proceeds thereof, will be an “investment company” or an entity controlled by an “investment company,” as such term is defined in the Investment Company Act.

Such counsel shall also state that they have participated in conferences with officers and other representatives of the Company, the Clean Harbors Guarantors, Safety-Klee, Inc. and its subsidiaries (“Safety-Kleen”) counsel for the Company, the Clean Harbors Guarantors and Safety-Kleen,, and representatives of the independent accountants of the Company, the Clean Harbors Guarantors and Safety-Kleen, at which the contents of the Pricing Disclosure Package and related matters were discussed. Such counsel shall also state that based on such participation, such counsel has no reason to believe that (i) the Pricing Disclosure Package as of the Applicable Time (other than the financial statements and other financial data therein, as to which such counsel need express no opinion) contained any untrue statement of a material fact or omitted to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; or (ii) the Offering Circular and any further amendments or supplements thereto made by the Company prior to the Time of Delivery (other than the financial statements and other financial data therein, as to which such counsel need express no opinion) contained as of its date or contains as of the Time of Delivery an untrue statement of a material fact or omitted or omits, as the case may be, to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading.

(c) On the date of the Offering Circular at a time prior to the execution of this Agreement, at 8:00 a.m., New York City time, and also at the Time of Delivery, (i) Deloitte & Touche LLP shall have furnished to the Purchasers a letter or letters, dated the respective dates of delivery thereof, in form and substance satisfactory to you, to the effect set forth in Annex I-A hereto and (ii) KPMG LLP shall have furnished to the Purchasers a letter or letters, dated the respective dates of delivery thereof, in form and substance satisfactory to you, to the effect set forth in Annex I-B hereto;

(d) (i) Neither the Company nor any of its subsidiaries shall have sustained since the date of the latest audited financial statements included or incorporated by reference in the Pricing Circular any loss or interference with its business from fire, explosion,

flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, otherwise than as set forth or contemplated in the Pricing Circular, and (ii) since the respective dates as of which information is given in the Pricing Circular there shall not have been any change in the capital stock or long term debt of the Company or any of its subsidiaries or any change, or any development involving a prospective change, in or affecting the general affairs, management, financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, otherwise than as set forth or contemplated in the Pricing Circular, the effect of which, in any such case described in clause (i) or (ii), is in your judgment so material and adverse as to make it impracticable or inadvisable to proceed with the offering or the delivery of the Securities on the terms and in the manner contemplated in this Agreement and the Offering Circular;

(e) On or after the Applicable Time (i) no downgrading shall have occurred in the rating accorded the Securities or any of the Company’s other debt securities by any “nationally recognized statistical rating organization,” as that term is defined by the Commission for purposes of Section 3(a)(62) of the Exchange Act, and (ii) no such organization shall have publicly announced that it has under surveillance or review, with possible negative implications, its rating of the Securities or of any of the Company’s other debt securities;

(f) On or after the Applicable Time there shall not have occurred any of the following: (i) a suspension or material limitation in trading in securities generally on the New York Stock Exchange; (ii) a suspension or material limitation in trading in the Company’s securities on the New York Stock Exchange; (iii) a general moratorium on commercial banking activities declared by either Federal or New York State authorities or a material disruption in commercial banking or securities settlement or clearance services in the United States; (iv) the outbreak or escalation of hostilities involving the United States or the declaration by the United States of a national emergency or war; or (v) the occurrence of any other calamity or crisis or any change in financial, political or economic conditions in the United States or elsewhere, if the effect of any such event specified in clause (iv) or (v) in your judgment makes it impracticable or inadvisable to proceed with the public offering or the delivery of the Securities on the terms and in the manner contemplated in the Offering Circular;

(g) The Company shall have complied with the provisions of Section 5(c) hereof with respect to the furnishing of the Offering Circular on the New York Business Day next succeeding the date of this Agreement;

(h) The Purchasers shall have received a counterpart of the Registration Rights Agreement that shall have been executed and delivered by a duly authorized officer of the Company and the Clean Harbors Guarantors;

(i) The Company shall have furnished or caused to be furnished to you at the Time of Delivery certificates of officers of the Company satisfactory to you as to the accuracy of the representations and warranties of the Company and the Clean Harbors Guarantors herein at and as of such time, as to the performance by the Company and the

Clean Harbors Guarantors of all of its obligations hereunder to be performed at or prior to the Time of Delivery, as to such other matters as you may reasonably request and the Company shall have furnished or caused to be furnished certificates as to the matters set forth in subsections (d) and (e) of this Section; and

(j) On or before the Time of Delivery the Company shall have consummated the Equity Offering.

9. (a) The Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor), jointly and severally, agree to indemnify and hold harmless each Purchaser against any losses, claims, damages or liabilities, joint or several, to which such Purchaser may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Preliminary Offering Circular, the Pricing Circular, the Offering Circular, or any amendment or supplement thereto, any Company Supplemental Disclosure Document, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, and will reimburse each Purchaser for any legal or other expenses reasonably incurred by such Purchaser in connection with investigating or defending any such action or claim as such expenses are incurred; provided, however, that the Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) shall not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in the Preliminary Offering Circular, the Pricing Circular, the Offering Circular, or any such amendment or supplement thereto, or any Company Supplemental Disclosure Document, in reliance upon and in conformity with written information furnished to the Company and the Clean Harbors Guarantors by any Purchaser through Goldman, Sachs & Co. expressly for use therein.

(b) Each Purchaser agrees severally and not jointly to indemnify and hold harmless the Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) against any losses, claims, damages or liabilities to which the Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Preliminary Offering Circular, the Pricing Circular, the Offering Circular, or any amendment or supplement thereto, or any Company Supplemental Disclosure Document, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Preliminary Offering Circular, the Pricing Circular, the Offering Circular or any such amendment or supplement thereto, or any Company Supplemental Disclosure Document, in reliance upon and in conformity with written information furnished to the Company and the Clean Harbors Guarantors by such Purchaser through Goldman, Sachs & Co. expressly for use therein; and will reimburse the Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) for any legal or

other expenses reasonably incurred by the Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) in connection with investigating or defending any such action or claim as such expenses are incurred.

(c) Promptly after receipt by an indemnified party under subsection (a) or (b) above of notice of the commencement of any action, such indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under such subsection, notify the indemnifying party in writing of the commencement thereof; but the omission so to notify the indemnifying party shall not relieve it from any liability which it may have to any indemnified party otherwise than under such subsection. In case any such action shall be brought against any indemnified party and it shall notify the indemnifying party of the commencement thereof, the indemnifying party shall be entitled to participate therein and, to the extent that it shall wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel satisfactory to such indemnified party (who shall not, except with the consent of the indemnified party, be counsel to the indemnifying party), and, after notice from the indemnifying party to such indemnified party of its election so to assume the defense thereof, the indemnifying party shall not be liable to such indemnified party under such subsection for any legal expenses of other counsel or any other expenses, in each case subsequently incurred by such indemnified party, in connection with the defense thereof other than reasonable costs of investigation. No indemnifying party shall, without the written consent of the indemnified party, effect the settlement or compromise of, or consent to the entry of any judgment with respect to, any pending or threatened action or claim in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified party is an actual or potential party to such action or claim) unless such settlement, compromise or judgment (i) includes an unconditional release of the indemnified party from all liability arising out of such action or claim and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act, by or on behalf of any indemnified party.

as the total net proceeds from the offering (before deducting expenses) received by the Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) bear to the total underwriting discounts and commissions received by the Purchasers, in each case as set forth in the table on the cover page of the Offering Circular. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) on the one hand or the Purchasers on the other and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The Company, the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) and the Purchasers agree that it would not be just and equitable if contribution pursuant to this subsection (d) were determined by pro rata allocation (even if the Purchasers were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to above in this subsection (d). The amount paid or payable by an indemnified party as a result of the losses, claims, damages or liabilities (or actions in respect thereof) referred to above in this subsection (d) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this subsection (d), no Purchaser shall be required to contribute any amount in excess of the amount by which the total price at which the Securities underwritten by it and distributed to investors were offered to investors exceeds the amount of any damages which such Purchaser has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Purchasers’ obligations in this subsection (d) to contribute are several in proportion to their respective underwriting obligations and not joint.

(e) The obligations of the Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) under this Section 9 shall be in addition to any liability which the Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) may otherwise have and shall extend, upon the same terms and conditions, to each person, if any, who controls any Purchaser within the meaning of the Act and each broker-dealer affiliate of any Purchaser; and the obligations of the Purchasers under this Section 9 shall be in addition to any liability which the respective Purchasers may otherwise have and shall extend, upon the same terms and conditions, to each officer and director of the Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) and to each person, if any, who controls the Company within the meaning of the Act.

10. (a) If any Purchaser shall default in its obligation to purchase the Securities which it has agreed to purchase hereunder at the Time of Delivery, you may in your discretion arrange for you or another party or other parties to purchase such Securities on the terms contained herein. If within thirty-six hours after such default by any Purchaser you do not arrange for the purchase of such Securities, then the Company shall be entitled to a further period of thirty-six hours within which to procure another party or other parties satisfactory to you to purchase such Securities on such terms. In the event that, within the respective prescribed periods, you notify the

Company that you have so arranged for the purchase of such Securities, or the Company notifies you that it has so arranged for the purchase of such Securities, you or the Company shall have the right to postpone the Time of Delivery for a period of not more than seven days, in order to effect whatever changes may thereby be made necessary in the Offering Circular, or in any other documents or arrangements, and the Company agrees to prepare promptly any amendments to the Offering Circular which in your opinion may thereby be made necessary. The term “Purchaser” as used in this Agreement shall include any person substituted under this Section with like effect as if such person had originally been a party to this Agreement with respect to such Securities.

(b) If, after giving effect to any arrangements for the purchase of the Securities of a defaulting Purchaser or Purchasers by you and the Company as provided in subsection (a) above, the aggregate principal amount of such Securities which remains unpurchased does not exceed one eleventh of the aggregate principal amount of all the Securities to be purchased, then the Company shall have the right to require each non-defaulting Purchaser to purchase the principal amount of Securities which such Purchaser agreed to purchase hereunder and, in addition, to require each non-defaulting Purchaser to purchase its pro rata share (based on the aggregate principal amount of Securities which such Purchaser agreed to purchase hereunder) of the Securities of such defaulting Purchaser or Purchasers for which such arrangements have not been made; but nothing herein shall relieve a defaulting Purchaser from liability for its default.

(c) If, after giving effect to any arrangements for the purchase of the Securities of a defaulting Purchaser or Purchasers by you and the Company as provided in subsection (a) above, the aggregate principal amount of such Securities which remains unpurchased exceeds one eleventh of the aggregate principal amount of all the Securities to be purchased, or if the Company shall not exercise the right described in subsection (b) above to require non-defaulting Purchasers to purchase Securities of a defaulting Purchaser or Purchasers, then this Agreement shall thereupon terminate, without liability on the part of any non-defaulting Purchaser or the Company, except for the expenses to be borne by the Company and the Purchasers as provided in Section 7 hereof and the indemnity and contribution agreements in Section 9 hereof; but nothing herein shall relieve a defaulting Purchaser from liability for its default.

11. The respective indemnities, agreements, representations, warranties and other statements of the Company and the several Purchasers, as set forth in this Agreement or made by or on behalf of them, respectively, pursuant to this Agreement, shall remain in full force and effect, regardless of any investigation (or any statement as to the results thereof) made by or on behalf of any Purchaser or any controlling person of any Purchaser, or the Company, or any officer or director or controlling person of the Company, and shall survive delivery of and payment for the Securities.

12. If this Agreement shall be terminated pursuant to Section 10 hereof, the Company shall not then be under any liability to any Purchaser except as provided in Sections 7 and 9 hereof; but, if for any other reason any of the Securities are not delivered by or on behalf of the Company as provided herein, the Company will reimburse the Purchasers through you for all out of pocket expenses approved in writing by you, including fees and disbursements of counsel, reasonably incurred by the Purchasers in making preparations for the purchase, sale and delivery

of the Securities not so delivered, but the Company shall then be under no further liability to any Purchaser except as provided in Sections 7 and 9 hereof.

13. In all dealings hereunder, you shall act on behalf of each of the Purchasers, and the parties hereto shall be entitled to act and rely upon any statement, request, notice or agreement on behalf of any Purchaser made or given by you.

14. All statements, requests, notices and agreements hereunder shall be in writing, and if to the Purchasers shall be delivered or sent by mail, telex or facsimile transmission to you as the representatives at Goldman, Sachs & Co., 200 West Street, New York, New York 10282, Attention: Registration Department and if to the Company shall be delivered or sent by mail, telex or facsimile transmission to the address of the Company set forth in the Offering Circular. Any such statements, requests, notices or agreements shall take effect upon receipt thereof.

In accordance with the requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)), the Purchasers is required to obtain, verify and record information that identifies their respective clients, including the Company, which information may include the name and address of their respective clients, as well as other information that will allow the Purchasers to properly identify their respective clients.

14. This Agreement shall be binding upon, and inure solely to the benefit of, the Purchasers, the Company and, to the extent provided in Sections 9 and 11 hereof, the officers and directors of the Company and each person who controls the Company or any Purchaser, and their respective heirs, executors, administrators, successors and assigns, and no other person shall acquire or have any right under or by virtue of this Agreement. No purchaser of any of the Securities from any Purchaser shall be deemed a successor or assign by reason merely of such purchase.

15. Time shall be of the essence of this Agreement. As used herein, the term “business day” shall mean any day when the Commission’s office in Washington, D.C. is open for business.

16. The Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor), jointly and severally, acknowledge and agree that (i) the purchase and sale of the Securities pursuant to this Agreement is an arm’s-length commercial transaction between the Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor), on the one hand, and the several Purchasers, on the other, (ii) in connection therewith and with the process leading to such transaction each Purchaser is acting solely as a principal and not the agent or fiduciary of the Company or any of the Clean Harbors Guarantors or any Safety-Kleen Guarantor, (iii) no Purchaser has assumed an advisory or fiduciary responsibility in favor of the Company and the Clean Harbors Guarantors or any Safety-Kleen Guarantor with respect to the offering contemplated hereby or the process leading thereto (irrespective of whether such Purchaser has advised or is currently advising the Company, any of the Clean Harbors Guarantors, or any Safety-Kleen Guarantor on other matters) or any other obligation to the Company or any of the Clean Harbors Guarantors or any Safety-Kleen Guarantor except the obligations expressly set forth in this Agreement and (iv) the Company and the Clean Harbors Guarantors (and upon execution of

the Purchase Agreement Joinder, each Safety-Kleen Guarantor) have consulted their own respective legal and financial advisors to the extent it deemed appropriate. The Company and the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) agree that they will not claim that the Purchasers, or any of them, have rendered advisory services of any nature or respect, or owe a fiduciary or similar duty to the Company or any of the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor), in connection with such transaction or the process leading thereto.

17. This Agreement supersedes all prior agreements and understandings (whether written or oral) between the Company, the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) and the Purchasers, or any of them, with respect to the subject matter hereof.

18. This Agreement shall be governed by and construed in accordance with the laws of the State of New York.

19. The Company, the Clean Harbors Guarantors (and upon execution of the Purchase Agreement Joinder, each Safety-Kleen Guarantor) and each of the Purchasers hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Agreement or the transactions contemplated hereby.

20. This Agreement may be executed by any one or more of the parties hereto in any number of counterparts, each of which shall be deemed to be an original, but all such respective counterparts shall together constitute one and the same instrument.

21. Notwithstanding anything herein to the contrary, the Company is authorized to disclose to any persons the U.S. federal and state income tax treatment and tax structure of the potential transaction and all materials of any kind (including tax opinions and other tax analyses) provided to the Company relating to that treatment and structure, without the Purchasers imposing any limitation of any kind. However, any information relating to the tax treatment and tax structure shall remain confidential (and the foregoing sentence shall not apply) to the extent necessary to enable any person to comply with securities laws. For this purpose, “tax structure” is limited to any facts that may be relevant to that treatment.

If the foregoing is in accordance with your understanding, please sign and return to us four (4) counterparts hereof, and upon the acceptance hereof by you, on behalf of each of the Purchasers, this letter and such acceptance hereof shall constitute a binding agreement among each of the Purchasers, the Company and the Clean Harbors Guarantors.

	Very truly yours,

	CLEAN HARBORS, INC.

	By:	/s/ James M. Rutledge
	Name:	James M. Rutledge
	Title:	Vice Chairman, President and Chief Operating Officer

	(signatures continued on next page)

(Signature Page to Purchase Agreement)

	ALTAIR DISPOSAL SERVICES, LLC
	BATON ROUGE DISPOSAL, LLC
	BRIDGEPORT DISPOSAL, LLC
	CH INTERNATIONAL HOLDINGS, LLC
	CH MERGER SUB. INC.
	CLEAN HARBORS (MEXICO), INC.
	CLEAN HARBORS ANDOVER, LLC
	CLEAN HARBORS ANTIOCH, LLC
	CLEAN HARBORS ARAGONITE, LLC
	CLEAN HARBORS ARIZONA, LLC
	CLEAN HARBORS BATON ROUGE, LLC
	CLEAN HARBORS BDT, LLC
	CLEAN HARBORS BUTTONWILLOW, LLC
	CLEAN HARBORS CATALYST TECHNOLOGIES, LLC
	CLEAN HARBORS CHATTANOOGA, LLC
	CLEAN HARBORS CLIVE, LLC
	CLEAN HARBORS COFFEYVILLE, LLC
	CLEAN HARBORS COLFAX, LLC
	CLEAN HARBORS DEER PARK, LLC
	CLEAN HARBORS DEER TRAIL, LLC
	CLEAN HARBORS DEVELOPMENT, LLC
	CLEAN HARBORS DISPOSAL SERVICES, INC.
	CLEAN HARBORS EL DORADO, LLC
	CLEAN HARBORS FLORIDA, LLC
	CLEAN HARBORS GRASSY MOUNTAIN, LLC
	CLEAN HARBORS KANSAS, LLC
	CLEAN HARBORS KINGSTON FACILITY CORPORATION
	CLEAN HARBORS LAPORTE, LLC
	CLEAN HARBORS LAUREL, LLC
	CLEAN HARBORS LONE MOUNTAIN, LLC
	CLEAN HARBORS LONE STAR CORP.
	CLEAN HARBORS LOS ANGELES, LLC
	CLEAN HARBORS OF BALTIMORE, INC.
	CLEAN HARBORS OF BRAINTREE, INC.
	CLEAN HARBORS OF CONNECTICUT, INC.
	CLEAN HARBORS PECATONICA, LLC
	CLEAN HARBORS PPM, LLC
	CLEAN HARBORS RECYCLING SERVICES OF CHICAGO, LLC
	CLEAN HARBORS RECYCLING SERVICES OF OHIO, LLC
	CLEAN HARBORS REIDSVILLE, LLC
	CLEAN HARBORS SAN JOSE, LLC
	CLEAN HARBORS SERVICES, INC.
	CLEAN HARBORS TENNESSEE, LLC
	CLEAN HARBORS WESTMORLAND, LLC

	(list continued on next page)

(Signature Page to Purchase Agreement)

	CLEAN HARBORS WHITE CASTLE, LLC
	CLEAN HARBORS WILMINGTON, LLC
	CROWLEY DISPOSAL, LLC
	DISPOSAL PROPERTIES, LLC
	DURATHERM, INC.
	GSX DISPOSAL, LLC
	HILLIARD DISPOSAL, LLC
	MURPHY’S WASTE OIL SERVICE, INC.
	PEAK ENERGY SERVICES USA, INC.
	ROEBUCK DISPOSAL, LLC
	SANITHERM USA, INC.
	SAWYER DISPOSAL SERVICES, LLC
	SERVICE CHEMICAL, LLC
	SPRING GROVE RESOURCE RECOVERY, INC.
	TULSA DISPOSAL, LLC


	By:	/s/ James M. Rutledge
	Name:	James M. Rutledge
	Title:	Executive Vice President and Treasurer

	ARC ADVANCED REACTORS AND COLUMNS, LLC

	CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
	CLEAN HARBORS EXPLORATION SERVICES, INC.
	CLEAN HARBORS INDUSTRIAL SERVICES, INC.


	By:	/s/ James M. Rutledge
	Name:	James M. Rutledge
	Title:	Executive Vice President, Chief
		Financial Officer and Treasurer


	PLAQUEMINE REMEDIATION SERVICES, LLC


	By:	/s/ Michael McDonald
	Name:	Michael McDonald
	Title:	President

(Signature Page to Purchase Agreement)

Accepted as of the date hereof:

GOLDMAN, SACHS & CO., on behalf of itself and as representative of the several Initial Purchasers


By:	/s/ Michael Hickey
	(Goldman, Sachs & Co.)

(Signature Page to Purchase Agreement)

SCHEDULE I

Approved Supplemental Disclosure Documents:

Pricing Supplement dated November 28, 2012.

Clean Harbors, Inc. Investor Presentation dated November 27, 2012 (electronic form and hard copy)

Schedule I-1

SCHEDULE II

GUARANTORS

Altair Disposal Services, LLC		Clean Harbors Pecatonica, LLC
ARC Advanced Reactors and Columns, LLC		Clean Harbors PPM, LLC
Baton Rouge Disposal, LLC		Clean Harbors Recycling Services of Chicago, LLC
Bridgeport Disposal, LLC		Clean Harbors Recycling Services of Ohio, LLC
CH International Holdings, LLC		Clean Harbors Reidsville, LLC
CH Merger Sub, Inc. Clean Harbors (Mexico), Inc.		Clean Harbors San Jose, LLC
Clean Harbors Andover, LLC		Clean Harbors Services, Inc.
Clean Harbors Antioch, LLC		Clean Harbors Tennessee, LLC
Clean Harbors Aragonite, LLC		Clean Harbors Westmorland, LLC
Clean Harbors Arizona, LLC		Clean Harbors White Castle, LLC
Clean Harbors Baton Rouge, LLC		Clean Harbors Wilmington, LLC
Clean Harbors BDT, LLC		Crowley Disposal, LLC
Clean Harbors Buttonwillow, LLC		Disposal Properties, LLC
Clean Harbors Catalyst Technologies, LLC		Duratherm, Inc.
Clean Harbors Chattanooga, LLC		GSX Disposal, LLC
Clean Harbors Clive, LLC		Hilliard Disposal, LLC
Clean Harbors Coffeyville, LLC		Murphy’s Waste Oil Service, Inc.
Clean Harbors Colfax, LLC		Peak Energy Services USA, Inc.
Clean Harbors Deer Park, LLC		Plaquemine Remediation Services, LLC
Clean Harbors Deer Trail, LLC		Roebuck Disposal, LLC
Clean Harbors Development, LLC		Sanitherm USA, Inc.
Clean Harbors Disposal Services, Inc.		Sawyer Disposal Services, LLC
Clean Harbors El Dorado, LLC		Service Chemical, LLC
Clean Harbors Environmental Services, Inc.		Spring Grove Resource Recovery, Inc.
Clean Harbors Exploration Services, Inc.		Tulsa Disposal, LLC
Clean Harbors Florida, LLC
Clean Harbors Grassy Mountain, LLC
Clean Harbors Industrial Services, Inc.
Clean Harbors Kansas, LLC
Clean Harbors Kingston Facility Corporation
Clean Harbors LaPorte, LLC
Clean Harbors Laurel, LLC
Clean Harbors Lone Mountain, LLC
Clean Harbors Lone Star Corp.
Clean Harbors Los Angeles, LLC
Clean Harbors of Baltimore, Inc.
Clean Harbors of Braintree, Inc.
Clean Harbors of Connecticut, Inc.

Schedule II-1

SCHEDULE III

[provided under separate cover]

Schedule III-1

SCHEDULE IV

[provided under separate cover]

Annex I-1

SCHEDULE V

[provided under separate cover]

Annex I-2

ANNEX I

COMFORT LETTER FROM DELOITTE & TOUCHE LLP

[provided under separate cover]

Annex I-3

ANNEX 1-B

COMFORT LETTER FROM KPMG LLP

[provided under separate cover]

Annex I-4

ANNEX II

(1) The Securities have not been and will not be registered under the Act and may not be offered or sold within the United States or to, or for the account or benefit of, U.S. persons except in accordance with Regulation S under the Act or pursuant to an exemption from the registration requirements of the Act. Each Purchaser represents that it has offered and sold the Securities, and will offer and sell the Securities (i) as part of their distribution at any time and (ii) otherwise until 40 days after the later of the commencement of the offering and the Time of Delivery, only in accordance with Rule 903 of Regulation S or Rule 144A or pursuant to Paragraph 2 of this Annex II under the Act. Accordingly, each Purchaser agrees that neither it, its affiliates nor any persons acting on its or their behalf has engaged or will engage in any directed selling efforts with respect to the Securities, and it and they have complied and will comply with the offering restrictions requirement of Regulation S. Each Purchaser agrees that, at or prior to confirmation of sale of Securities (other than a sale pursuant to Rule 144A) or pursuant to Paragraph 2 of this Annex II, it will have sent to each distributor, dealer or person receiving a selling concession, fee or other remuneration that purchases Securities from it during the restricted period a confirmation or notice to substantially the following effect:

“THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S. PERSONS EXCEPT AS SET FORTH BELOW. BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A) IT IS A “QUALIFIED INSTITUTIONAL BUYER” (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT), (B) IT IS NOT A U.S. PERSON AND IS ACQUIRING THIS SECURITY IN AN OFFSHORE TRANSACTION IN COMPLIANCE WITH RULE 904 UNDER THE SECURITIES ACT OR (C) IT IS AN ACCREDITED INVESTOR (AS DEFINED IN RULE 501(A)(1), (2), (3), OR (7) UNDER THE SECURITIES ACT) (AN “ACCREDITED INVESTOR”), (2) AGREES THAT IT WILL NOT PRIOR TO THE FIRST ANNIVERSARY OF THE ORIGINAL ISSUANCE OF THIS SECURITY RESELL OR OTHERWISE TRANSFER THIS SECURITY EXCEPT (A) TO THE ISSUER OR ANY SUBSIDIARY THEREOF, (B) INSIDE THE UNITED STATES TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (C) INSIDE THE UNITED STATES TO AN ACCREDITED INVESTOR THAT, PRIOR TO SUCH TRANSFER, FURNISHES (OR HAS FURNISHED ON ITS BEHALF BY A U.S. BROKER-DEALER) TO THE TRUSTEE A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF THIS SECURITY (THE FORM

Annex II-1

OF WHICH LETTER CAN BE OBTAINED FROM THE TRUSTEE FOR THIS SECURITY), (D) OUTSIDE THE UNITED STATES IN AN OFFSHORE TRANSACTION IN COMPLIANCE WITH RULE 904 UNDER THE SECURITIES ACT (IF AVAILABLE), (E) PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE), (F) IN ACCORDANCE WITH ANOTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT (AND BASED UPON AN OPINION OF COUNSEL IF THE ISSUER SO REQUESTS), OR (G) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT AND (3) AGREES THAT IT WILL GIVE TO EACH PERSON TO WHOM THIS SECURITY IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY TRANSFER OF THIS SECURITY WITHIN ONE YEAR AFTER THE ORIGINAL ISSUANCE OF THIS SECURITY, IF THE PROPOSED TRANSFEREE IS AN ACCREDITED INVESTOR, THE HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE TRUSTEE AND THE ISSUER SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS EITHER OF THEM MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. AS USED HEREIN, THE TERMS “OFFSHORE TRANSACTION,” “UNITED STATES” AND “U.S. PERSON” HAVE THE MEANING GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT.”

Terms used in this paragraph have the meanings given to them by Regulation S.

Each Purchaser further severally agrees that it has not entered and will not enter into any contractual arrangement with respect to the distribution or delivery of the Securities, except with its affiliates or with the prior written consent of the Company.

(2) Notwithstanding the foregoing, Securities in registered form may be offered, sold and delivered by the Purchasers in the United States and to U.S. persons pursuant to Section 3 of this Agreement without delivery of the written statement required by paragraph (1) above.

Annex II-2

Exhibit A

Form of Joinder Agreement

WHEREAS, Clean Harbors, Inc,, a Massachusetts corporation (the “Company”), the guarantors party thereto and the Initial Purchasers named therein (the “Initial Purchasers”) heretofore executed and delivered a Purchase Agreement (“Purchase Agreement”), dated November 28, 2012, providing for the issuance and sale of the Securities (as defined therein); and

WHEREAS, each of the undersigned, which was originally not a party thereto, has agreed to join in the Purchase Agreement on the Acquisition Date.

Capitalized terms used herein and not otherwise defined herein shall have the meanings ascribed to such terms in the Purchase Agreement.

NOW, THEREFORE, in consideration of the foregoing, each of the undersigned hereby agrees for the benefit of the Initial Purchasers as follows:

1. Joinder. The undersigned hereby acknowledges that it has received and reviewed a copy of the Purchase Agreement and all other documents it deems fit to enter into this Joinder Agreement (the “Joinder Agreement”), and acknowledges, jointly and severally and agrees to (i) join and become a party to the Purchase Agreement as indicated by its signature below; (ii) be bound by all covenants, agreements, indemnities and acknowledgments attributable to Guarantors in the Purchase Agreement as if made by, and with respect to, it; and (iii) perform all obligations and duties required of a Guarantor pursuant to the Purchase Agreement.

2. Representations and Warranties. Each of the undersigned hereby represents and warrants to and agrees with the Initial Purchasers as follows:

(a) has been duly organized and is validly existing and in good standing under the laws of its jurisdiction of organization or formation, is duly qualified to do business and is in good standing in each jurisdiction in which its ownership or lease of property or the conduct of their respective businesses requires such qualification, and has all power and authority to own or hold its properties and to conduct the businesses in which it is engaged, except where the failure to be so qualified or have such power or authority would not, individually or in the aggregate, have a Material Adverse Effect;

(b) this Joinder Agreement has been duly authorized, executed and delivered by it;

(c) the Supplemental Indenture has been duly authorized, executed and delivered by it and (assuming the due authorization, execution and delivery thereof by the Trustee) will constitute a valid and legally binding agreement of it enforceable against it in accordance with the terms thereof, subject to the Enforceability Limitations;

(d) the Registration Rights Joinder has been duly authorized, executed and delivered by it and will constitute a valid and legally binding agreement of it enforceable against it in accordance with the terms thereof, subject to the Enforceability Limitations;

Annex II-3

(e) no consent, approval, authorization, filing with or order of any court or governmental agency or body is required in connection with the execution and delivery of this Joinder Agreement, the Supplemental Indenture, the Registration Rights Joinder or the transactions contemplated herein or therein, except such as have been obtained prior to the execution and delivery thereof; and

(f) the execution, delivery and performance by it of each of this Joinder Agreement, the Supplemental Indenture and the Registration Rights Joinder and the performance of, and compliance with, the terms thereof by it will not (i) conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, or result in the creation or imposition of any lien, charge or encumbrance upon any property or assets of it or any of its subsidiaries pursuant to, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which it or any of its subsidiaries is a party or by which it or any of its subsidiaries is bound or to which any of the property or assets of it or any of its subsidiaries is subject, (ii) result in any violation of the provisions of the charter or by-laws or similar organizational documents of it or any of its subsidiaries or (iii) assuming compliance with all applicable state securities or “Blue Sky” laws, result in the violation of any law or statute or any judgment, order, rule or regulation of any court or arbitrator or governmental or regulatory authority, except, in the case of clauses (i) and (iii) above, for any such conflict, breach or violation that would not, individually or in the aggregate, have a Material Adverse Effect.

3. Counterparts. This Joinder Agreement may be signed in one or more counterparts (which may be delivered in original form or telecopier), each of which shall constitute an original when so executed and all of which together shall constitute one and the same agreement.

4. Amendments. No amendment or waiver of any provision of this Joinder Agreement, nor any consent or approval to any departure therefrom, shall in any event be effective unless the same shall be in writing and signed by the parties hereto.

5. Headings. The section headings used herein are for convenience only and shall not affect the construction hereof.

6. APPLICABLE LAW. THE VALIDITY AND INTERPRETATION OF THIS JOINDER AGREEMENT, AND THE TERMS AND CONDITIONS SET FORTH HEREIN SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO CONTRACTS MADE AND TO BE PERFORMED WHOLLY THEREIN.

[Remainder of Page Intentionally Left Blank]

Annex II-4

IN WITNESS WHEREOF, each of the undersigned has executed this agreement this [ ]th day of [ ], 20[ ].

	[ ]


	By:
		Name:
		Title:

Annex II-5

	Goldman, Sachs & Co., on behalf of itself and as representative of the several Initial Purchasers


	By:
		Name:
		Title:

Annex II-6

EX-5.1 4 a12-27731_3ex5d1.htm EX-5.1

Exhibit 5.1

Davis, Malm & D’Agostine, P.C.

One Boston Place

Boston, MA 02108

Tel. 617-367-2500

November 27, 2012

Clean Harbors, Inc.

42 Longwater Drive

Norwell, MA 02161

Re: Registration Statement on Form S-3

Ladies and Gentlemen:

We have acted as counsel for Clean Harbors, Inc., a Massachusetts corporation (the “Company”), in connection with the preparation of a prospectus supplement dated November 27, 2012 (the “Prospectus Supplement”), supplementing the base prospectus dated November 26, 2012, included in the Registration Statement on Form S-3 (Registration No. 333-185141) (the “Registration Statement”), filed by the Company with the Securities and Exchange Commission (the “SEC”) under the Securities Act of 1933, as amended (the “Securities Act”). Such prospectus supplement (including the base prospectus) is referred to below as the “Prospectus.” The Prospectus relates to the issuance and sale of (i) 6,000,000 shares (the “Firm Securities”) of the Company’s common stock, par value $.01 per share (“Stock”) in a public offering and (ii) up to 900,000 additional shares (the “Optional Securities”) of Stock pursuant to the option granted by the Company to the underwriters for such public offering. The Firm Securities and the Optional Securities are collectively referred to below as the “Securities”.

We have examined the Restated Articles of Organization, as amended and Restated By-Laws of the Company, copies of resolutions of the Company’s Board of Directors and of the Pricing Committee of the Company’s Board of Directors, the Registration Statement (including the documents incorporated therein by reference) and the exhibits thereto, the Prospectus, and such other documents as we deemed pertinent. We have also made such examination of law as we have felt necessary in order to render this opinion.

As to certain factual matters relevant to this opinion, we have relied conclusively upon originals or copies, certified or otherwise identified to our satisfaction, of such records, agreements, documents and instruments, including certificates or comparable documents of officers of the Company and certificates of public officials, as we have deemed appropriate as a basis for the opinion hereinafter set forth. Except to the extent expressly set forth herein, we have made no independent investigation with regard to matters of fact, and we do not express any opinion as to matters of fact that might have been disclosed by independent verification. In rendering our opinion set forth below, we have assumed, without independent verification, (i) the genuineness of all signatures, (ii) the legal capacity of all natural persons, (iii) the authenticity of all documents submitted to us as originals, and (iv) the conformity to the original documents of all documents submitted to us as conformed, facsimile, photostatic or electronic copies.

Based upon and subject to the foregoing, we are of the opinion that, upon the issuance and sale of the Securities in the manner described in the Prospectus, the Securities will be legally issued, fully-paid and nonassessable.

We are providing this opinion to you for your use in connection with the Registration Statement and the transactions contemplated by the Registration Statement, and this opinion may not be used or relied upon by any other person or for any other purpose without our express written consent, except that you may file this opinion with the SEC as an exhibit to a Report on Form 8-K which will be deemed incorporated by reference into the Registration Statement and the Prospectus as described below. The only opinion rendered by us consists of those matters set forth in the preceding paragraph, and no opinion may be implied or inferred beyond the opinion expressly stated. In particular, but without limitation, this opinion does not pass on the application of “Blue Sky” or securities law of the various states or of any jurisdiction (other than the federal securities laws of the United States) in which the Securities may be offered or sold.

We hereby consent that this opinion may be filed as an exhibit to a Report on Form 8-K which will be deemed incorporated by reference into the Registration Statement and the Prospectus and to the use of our name under the heading “Validity of Common Stock” in the Prospectus. In giving our consent, we do not admit that we are “experts” within the meaning of Section 11 of the Securities Act or within the category of persons whose consent is required by Section 7 of the Securities Act.

	Very truly yours,

	DAVIS, MALM & D’AGOSTINE, P.C.

	By:	/s/ C. Michael Malm
	C. Michael Malm
	Managing Director