Document:

Specimen Unit Certificate

 EXHIBIT 4.1 
 [Founders’ Unit Legend 
 THE SECURITIES REPRESENTED BY THIS UNIT CERTIFICATE (INCLUDING THE UNDERLYING COMMON STOCK,
WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THE UNDERLYING WARRANT ) HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR THE SECURITIES LAWS OF ANY STATE OR OTHER JURISDICTION, AND MAY NOT BE
TRANSFERRED IN VIOLATION OF SUCH ACT AND LAWS, OR AN EXEMPTION FROM REGISTRATION THEREFROM. 
 THE SECURITIES REPRESENTED BY THIS UNIT CERTIFICATE (INCLUDING
THE UNDERLYING COMMON STOCK, WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THE UNDERLYING WARRANT ) ARE SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER AND OTHER AGREEMENTS SET FORTH IN (I) THE LETTER AGREEMENT DATED AS OF
                        , 2007, BY AND BETWEEN THE HOLDER AND CREDIT SUISSE SECURITIES (USA) LLC AND ROTH CAPITAL PARTNERS, LLC
AND (II) THE WARRANT AGREEMENT DATED AS OF                         , 2007, BY AND BETWEEN THE COMPANY AND THE WARRANT AGENT.
COPIES OF SUCH AGREEMENTS MAY BE OBTAINED BY THE HOLDER HEREOF AT THE COMPANY’S PRINCIPAL PLACE OF BUSINESS WITHOUT CHARGE.] 
  

			
	NUMBER
U-            	 	             UNITS

 SEE REVERSE FOR 
 CERTAIN DEFINITIONS 
 HECKMANN CORPORATION 
 CUSIP:              
 UNITS CONSISTING OF ONE SHARE OF COMMON STOCK AND 
 ONE WARRANT TO PURCHASE ONE SHARE OF COMMON STOCK 
 THIS CERTIFIES THAT
                                        
                             is the owner of
                             Units. 
 Each Unit (“Unit”) consists of one (1) share of common stock, par value $.001 per share (the “Common Stock”), of Heckmann
Corporation, a Delaware corporation (the “Corporation”), and one warrant (the “Warrant”). The Warrant entitles the holder to purchase one (1) share of Common Stock for $6.00 per share (subject to adjustment pursuant to the
Warrant Agreement, as described below). The Warrant will become exercisable on the later of (i) the completion of a Business Combination (as such term is defined in the Amended and Restated Articles of Incorporation of the Corporation), and
(ii)                     , 2008 [one year after the effective date of the registration statement relating to the initial public offering of
the Units], and will expire unless exercised before 5:00 p.m., New York City time, on                     , 2011 [four years after the
effective date of the registration statement relating to the initial public offering of the Units], or earlier upon redemption (the “Expiration Date”). The Common Stock and the Warrant comprising the Units represented by this
certificate are not transferable separately prior to                     , 2007 [the fifth day after the expiration date of the underwriters’
over-allotment option], subject to earlier separation in the event that the underwriters’ over-allotment option is exercised in full prior to such date. The terms of the Warrants are governed by a Warrant Agreement, dated as of
                    , 2007, between the Corporation and American Stock Transfer & Trust Company (the “Warrant Agent”) and are
subject to the terms and provisions contained therein, all of which terms and provisions the holder of this certificate consents to by acceptance hereof. This Unit Certificate shall be governed in accordance with the laws of the State of Delaware.
Copies of the Warrant Agreement are on file at the office of the Warrant Agent at 59 Maiden Lane, New York, New York 10038 and are available to any Warrant holder on written request and without cost. 
  

 1 

 This certificate is not valid unless countersigned by the Transfer Agent and Registrar of the
Corporation. 
 Witness the facsimile seal of the Corporation and the facsimile signature of its duly authorized officers. 
 HECKMANN CORPORATION 
 CORPORATE 
 DELAWARE 
 SEAL 
 2007 
  

					
	By:                                     
                                        
                    	  		  	 
	 President
	  		  	Secretary
		  		  	
	 Countersigned By:
                                        
                
 Transfer
Agent
	  		  	

  

 2 

 HECKMANN CORPORATION 
 The Corporation will furnish without charge to each unit holder who so requests, a statement of the powers, designations, preferences and relative, participating, optional or other special rights of each class of stock or series thereof of
the Corporation and the qualifications, limitations, or restrictions of such preferences and/or rights. 
 The following abbreviations, when used in the
inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or regulations: 
  

									
	TEN COM —	  	as tenants in common	  	UNIF GIFT MIN ACT —	  	                 Custodian                
 
					
	TEN ENT—	  	as tenants by the entireties	  		  	(Cust)	  	(Minor)
				
	JT TEN —	  	 as joint tenants with right of survivorship
 and
not as tenants in common
	  		  	 under Uniform Gifts to
 Minors Act
                

		  		  		  		  	(State)

 Additional abbreviations may also be used though not in the above list. 
 FOR VALUE RECEIVED,
                                        
                 HEREBY SELLS, ASSIGNS AND TRANSFERS UNTO 
 (PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE) 
  

			
	 	  	 
	 	  	 
	  	  	  

 (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

  

			
	  	  	  
		
		  	 

                                       
                                        
                   UNITS REPRESENTED BY THE WITHIN CERTIFICATE, AND DOES HEREBY IRREVOCABLY CONSTITUTE AND APPOINT
                                        
                 ATTORNEY TO TRANSFER THE SAID UNITS ON THE BOOKS OF THE WITHIN NAMED CORPORATION WITH FULL POWER OF SUBSTITUTION IN THE PREMISES. 
 DATED:
                                        
                                        
         
 NOTICE: The signature to this assignment must correspond with the name as written
upon the face of the certificate in every particular, without alteration or enlargement or any change whatever. 
  

	
	 Signature(s) Guaranteed:
  
  

	  
 THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS,
STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO SECURITIES AND EXCHANGE COMMISSION RULE 17Ad-15).

  

 3Specimem Common Stock Certificate

 EXHIBIT 4.2 
  

			
	NUMBER             	 	             SHARES

 HECKMANN CORPORATION 
 INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE 
 COMMON STOCK 
 SEE REVERSE FOR 
 CERTAIN DEFINITIONS 

CUSIP:                  
 THIS CERTIFIES THAT                                 
                                        
                                        
                                        
                                        
                
 IS THE OWNER OF                                 
                                        
                                        
                                        
                                        
                        
 FULLY PAID AND NON-ASSESSABLE SHARES OF THE PAR VALUE OF $0.001 EACH 
 OF THE COMMON STOCK OF 
 HECKMANN CORPORATION 
 TRANSFERABLE ON THE BOOKS OF THE
COMPANY IN PERSON OR BY DULY AUTHORIZED ATTORNEY UPON SURRENDER OF THIS CERTIFICATE PROPERLY ENDORSED. THIS CERTIFICATE IS NOT VALID UNLESS COUNTERSIGNED BY THE TRANSFER AGENT AND REGISTERED BY THE REGISTRAR. WITNESS THE SEAL OF THE COMPANY AND THE
FACSIMILE SIGNATURES OF ITS DULY AUTHORIZED OFFICERS. 
 DATED: 
 HECKMANN CORPORATION 
 CORPORATE 
 DELAWARE 
 SEAL 
 2007 
  

							
	 By:
	 	                                      
                                  	 		 	                                      
                                        
                           
		 	 President
	 		 	Secretary
				
	 By:
	 	                                      
                                  	 		 	
		 	Transfer Agent	 		 	

  

 1 

 The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though
they were written out in full according to applicable laws or regulations: 
  

									
	TEN COM —	  	as tenants in common	  	UNIF GIFT MIN ACT —	  	                 Custodian                
 
					
	TEN ENT—	  	as tenants by the entireties	  		  	(Cust)	  	(Minor)
				
	JT TEN —	  	 as joint tenants with right of survivorship
 and
not as tenants in common
	  		  	 under Uniform Gifts to
 Minors Act
                

		  		  		  		  	(State)

 Additional abbreviations may also be used though not in the above list. 
 HECKMANN CORPORATION 
 Heckmann Corporation
(the “Company”) will furnish without charge to each stockholder who so requests the powers, designations, preferences and relative, participating, optional or other special rights of each class of stock or series thereof of the Company and
the qualifications, limitations, or restrictions of such preferences and/or rights. This certificate and the shares represented hereby are issued and shall be held subject to all the provisions of the Amended and Restated Certificate of
Incorporation of the Company and all amendments thereto and resolutions of the Board of Directors providing for the issue of shares of Preferred Stock (copies of which may be obtained from the secretary of the Company), to all of which the holder of
this certificate by acceptance hereof assents. 
 FOR VALUE RECEIVED,
                                        
                 HEREBY SELLS, ASSIGNS AND TRANSFERS UNTO 
 (PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE) 
  

			
	 	  	 
	 	  	 
	  	  	  

 (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

  

			
	  	  	  
		
		  	 

                                       
                                        
                               SHARES OF THE CAPITAL STOCK REPRESENTED BY THE WITHIN
CERTIFICATE, AND DOES HEREBY IRREVOCABLY CONSTITUTE AND APPOINT
                                        
         ATTORNEY TO TRANSFER THE SAID STOCK ON THE BOOKS OF THE WITHIN NAMED CORPORATION WITH FULL POWER OF SUBSTITUTION IN THE PREMISES. 
 DATED:
                                        
                                        
         
 NOTICE: The signature to this assignment must correspond with the name as written
upon the face of the certificate in every particular, without alteration or enlargement or any change whatever. 
  

	
	 Signature(s) Guaranteed:
  
  

	  
 THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS,
STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO SECURITIES AND EXCHANGE COMMISSION RULE 17Ad-15). THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE
GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO SECURITIES AND EXCHANGE COMMISSION RULE 17Ad-15).

 The holder of this certificate shall be entitled to receive funds from the Trust Account (as such
term is defined in the Amended and Restated Certificate of Incorporation of the Company) only in the event of the Company’s liquidation upon failure to consummate a Business Combination (as such term is defined in the Amended and Restated
Certificate of Incorporation of the Company) or if the holder seeks to convert his respective shares into cash upon a Business Combination which he voted against and which is actually completed by the Company. In no other circumstances shall the
holder have any right or interest of any kind in or to the Trust Account. 
  
  

 2

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00125-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00125-of-00352.parquet"}]]