Document:

Specimen Representatives' Unit Certificate

 Exhibit 4.6 
  

			
	 NUMBER
	  	                    UNITS
	 U–            
	  	

 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 $7.50 per share (subject to adjustment pursuant to the Warrant Agreement, as described below). The Warrant is exercisable immediately 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 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. 
 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

  

 1 

 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).
	

  

 2Specimen Representatives' Warrant Certificate

 Exhibit 4.7 
  

			
	 NUMBER
	  	WARRANTS
	            	  	

 THIS WARRANT WILL BE VOID IF NOT EXERCISED PRIOR TO 
 5:00 P.M. NEW YORK CITY TIME,
                    , 2011 
 HECKMANN CORPORATION 
 [CUSIP #] 
 WARRANT 
 THIS CERTIFIES THAT, for value received
                                        
is the registered holder of a Warrant or Warrants expiring                     , 2011 (the “Warrant”) to purchase one fully
paid and non-assessable share of Common Stock, par value $0.001 per share (the “Shares”), of Heckmann Corporation, a Delaware corporation (the “Company”), for each Warrant evidenced by this Warrant Certificate. The Warrant
entitles the holder thereof to purchase from the Company such number of Shares of the Company at the price of $7.50 per share, upon surrender of this Warrant Certificate accompanied by the annexed duly executed subscription form and payment of the
Warrant Price at the office or agency of American Stock Transfer & Trust (the “Warrant Agent”) (such payment to be made by check payable to the Warrant Agent), but only subject to the conditions set forth herein and in the warrant
agreement between the Company and the Warrant Agent (the “Warrant Agreement”). The Warrant Agreement provides that upon the occurrence of certain events the Warrant Price and the number of Warrant Shares purchasable hereunder, set forth on
the face hereof, may, subject to certain conditions, be adjusted. The term “Warrant Price” as used in this Warrant Certificate refers to the price per Share at which Shares may be purchased at the time the Warrant is exercised. 

No fraction of a Share will be issued upon any exercise of a Warrant. If the holder of a Warrant would be entitled to receive a fraction of a Share
upon any exercise of a Warrant, the Company shall, upon such exercise, round up to the nearest whole number the number of Shares to be issued to such holder. 
 Upon any exercise of the Warrant for less than the total number of full Shares provided for herein, there shall be issued to the registered holder hereof or his assignee a new Warrant Certificate covering the number
of Shares for which the Warrant has not been exercised. 
 Warrant Certificates, when surrendered at the office or agency of the Warrant
Agent by the registered holder hereof in person or by attorney duly authorized in writing, may be exchanged in the manner and subject to the limitations provided in the Warrant Agreement, but without payment of any service charge, for another
Warrant Certificate or Warrant Certificates of like tenor and evidencing in the aggregate a like number of Warrants. 
 Upon due presentment
for registration of transfer of the Warrant Certificate at the office or agency of the Warrant Agent, a new Warrant Certificate or Warrant Certificates of like tenor and evidencing in the aggregate a like number of Warrants shall be issued to the
transferee in exchange for this Warrant Certificate, subject to the limitations provided in the Warrant Agreement, without charge except for any applicable tax or other governmental charge. 
 The Company and the Warrant Agent may deem and treat the registered holder as the absolute owner of this Warrant Certificate (notwithstanding any
notation of ownership or other writing hereon made by anyone), for the purpose of any exercise hereof, of any distribution to the registered holder, and for all other purposes, and neither the Company nor the Warrant Agent shall be affected by any
notice to the contrary. 
  

 1 

 This Warrant does not entitle the registered holder to any of the rights of a stockholder of the Company.

 The Company reserves the right to call the Warrant at any time prior to its exercise, with a notice of call in writing to the holders of
record of the Warrant, giving thirty (30) days prior written notice of such call at any time after the Warrant becomes exercisable if the last sale price of the Shares has been at least $11.50 per share (the “Trigger Price”) on any
twenty (20) trading days within any thirty (30) trading day period ending on the third business day prior to the date on which notice of such call is given (the “Measurement Period”). The Warrant may not be called unless the
Warrant and the Shares are covered by an effective registration statement and a current prospectus from the beginning of the Measurement Period through the date fixed for the call. The call price of the Warrants is to be $.01 per Warrant. Any
Warrant either not exercised or tendered back to the Company by the end of the date specified in the notice of call shall be canceled on the books of the Company and have no further value except for the $.01 call price. The Trigger Price is subject
to adjustments as provided in the Warrant Agreement. 
  

					
	 By :
	 		 	
			
	  
	 		 	  

	 President
	 		 	 Secretary

  

 2 

 SUBSCRIPTION FORM 
 To Be Executed by the Registered Holder in Order to Exercise Warrants 
 The undersigned Registered Holder irrevocably elects
to exercise                     Warrants represented by this Warrant Certificate, and to purchase the shares of Common Stock issuable upon the
exercise of such Warrants, and requests that Certificates for such shares shall be issued in the name of 
 (PLEASE TYPE OR PRINT NAME AND
ADDRESS) 
 (SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER) 
 and be delivered to 
 (PLEASE PRINT OR TYPE NAME AND ADDRESS) 
 and, if such number of Warrants shall not be all the Warrants evidenced by this Warrant Certificate, that
a new Warrant Certificate for the balance of such Warrants be registered in the name of, and delivered to, the Registered Holder at the address stated below: 
 Dated: 
  

			
		  	(SIGNATURE)
		
		  	(ADDRESS)    
		
		  	(TAX IDENTIFICATION NUMBER)

 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). 
  

 3 

 ASSIGNMENT 
 To Be Executed by the Registered Holder in Order to Assign Warrants 
 For Value Received,
hereby sells, assigns, and transfers unto 
 (PLEASE TYPE OR PRINT NAME AND ADDRESS) 
 (SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER) 
 of the Warrants represented by this
Warrant Certificate, and hereby irrevocably constitutes and appoints Attorney to transfer this Warrant Certificate on the books of the Company, with full power of substitution in the premises. 
 Dated: 
 (SIGNATURE) 
 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). 
  

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