Document:

Promissory Note

 Exhibit 10.4 
 PROMISSORY NOTE 
  

			
	 Borrower:
	  	 Heckmann Corporation of
 75080 Frank Sinatra
Dr.
 Palm Desert, California 92211

		
	 Lender:
	  	Richard J. Heckmann
		
	 Principal Amount:
	  	$258,300.00

 1. FOR VALUE RECEIVED, Heckmann Corporation promises to pay to Richard J. Heckmann, at such address as may be
provided in writing to Heckmann Corporation, the principal sum of two hundred fifty thousand ($258,300.00) USD or such lesser amount, as the case may be, equal to the funds advanced by Richard J. Heckmann to or on behalf of Heckmann Corporation,
with interest payable on the unpaid principal at the rate of 3.60 percent per annum, calculated half-yearly not in advance. Documentation to substantiate all amounts advanced to or on behalf of Heckmann Corporation pursuant to this Note shall be
attached hereto as such funds are so advanced. 
 2. This Note will be repaid in full on December 1, 2007. 
 3. At any time, Heckmann Corporation may pay the outstanding balance then owing under this Note to Richard J. Heckmann without further bonus or penalty. 
 4. This Note will be construed in accordance with and governed by the laws of the State of California. 
 5. If any term, covenant, condition or provision of this Note is held by a court of competent jurisdiction to be invalid, void or unenforceable, it is the parties’ intent that such provision be reduced in scope
by the court only to the extent deemed necessary by that court to render the provision reasonable and enforceable and the remainder of the provisions of this Note will in no way be affected, impaired or invalidated as a result. 
 6. All costs, expenses and expenditures including, and without limitation, the reasonable legal costs incurred by Richard J. Heckmann in enforcing this Note as a result
of any default by Heckmann Corporation, will be added to the principal then outstanding and will immediately be paid by Heckmann Corporation. 
 7. This Note
will inure to the benefit of and be binding upon the respective heirs, executors, administrators, successors and assigns of Heckmann Corporation and Richard J. Heckmann. Heckmann Corporation waives presentment for payment, notice of non-payment,
protest and notice of protest. 
 8. Mandatory prepayment. In the event that an initial public offering for Heckmann Corporation (the “IPO”) is
completed before December 1, 2007, Heckmann Corporation will make full repayment of this Note within seven days following the IPO closing date. 
 IN WITNESS
WHEREOF Heckmann Corporation has duly affixed its signature by a duly authorized officer under seal on this 4th day of June, 2007. 
 SIGNED, SEALED, AND
DELIVERED 
 this 4th day of June, 2007. 
  

			
	 Heckmann Corporation

		
	 By:
	 	 /s/ Richard J. Heckmann

		 	 Name: Richard J. Heckmann
 Title: Chief Executive
OfficerLetter Agreement between Heckmann Acquisition, LLC and Heckmann Corporation

 Exhibit 10.5 
                     , 2007 
 Heckmann Corporation 
 75080 Frank Sinatra Drive 
 Palm Desert, California 92211 
 Re: INITIAL PUBLIC OFFERING 
 Ladies and Gentlemen: 
 This letter is being delivered to you in accordance with the Underwriting Agreement (the
“Underwriting Agreement”) entered into by and between Heckmann Corporation, a Delaware corporation (the “Company”), Credit Suisse Securities (USA) LLC and Roth Capital Partners, LLC (together, the
“Underwriters”), relating to an underwritten initial public offering (the “IPO”) of the Company’s units (the “Units”), each Unit comprised of one share of the Company’s Common Stock, par
value $0.001 per share (the “Common Stock”), and one warrant, which is exercisable for one share of Common Stock. Certain capitalized terms used herein are defined in paragraph 9 hereof. 
 In order to induce the Company and the Underwriters to enter into the Underwriting Agreement and to proceed with the IPO, and in recognition of the
benefit that such IPO will confer upon the undersigned as a stockholder of the Company, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the undersigned hereby agrees with the Company and
the Underwriters as follows: 
 1. If the Company solicits approval of its stockholders of a Business Combination, the undersigned will vote all Insider
Shares owned by the undersigned in accordance with the majority of the votes cast by the holders of the IPO Shares. 
 2. In the event that the Company fails
to consummate a Business Combination within twenty four (24) months from the effective date (the “Effective Date”) of the Registration Statement, the undersigned will take all reasonable actions within the undersigned’s
power to (i) cause the Trust Account to be liquidated and distributed to the holders of IPO Shares in accordance with that Investment Management Trust Agreement to be entered into by and among the Company and American Stock Transfer &
Trust Company, as Trustee (the “Trust Agreement”); (ii) cause the Company to liquidate as soon as reasonably practicable; and (iii) be liable to (A) pay the costs of dissolution and liquidation to the extent such
expenses exceed the Company’s assets outside of the Trust Account and (B) ensure that the proceeds in the Trust Account are not reduced by the claims of vendors for services rendered or products sold to the Company, as well as claims of
prospective target businesses. The undersigned hereby waives any and all right, title, interest or claim of any kind (each a “Claim”) in or to (x) any distribution of the Trust Account with respect to the undersigned’s
Insider Shares (other than the undersigned’s Private Placement Units) in connection with a liquidation and (y) any remaining net assets of the Company after such liquidation. The undersigned hereby waives any Claim the 

 
undersigned may have in the future as a result of, or arising out of, any contracts or agreements with the Company and will not seek recourse against the
funds held in or distributed from the Trust Account for any reason (other than with respect to the undersigned’s Private Placement Units or with respect to reimbursement of reasonable out-of-pocket expenses incurred in connection with seeking
and consummating a Business Combination). The undersigned acknowledges and agrees that there will be no distribution from the Trust Account with respect to any warrants, all rights of which will terminate on the Company’s liquidation.

 3. Except as disclosed in the Registration Statement, none of the undersigned, any member of the family of the undersigned, nor any Affiliate of the
undersigned will be entitled to receive and will not accept any compensation for services rendered to the Company prior to or in connection with the consummation of the Business Combination; provided, that the undersigned shall be entitled to
reimbursement from the Company upon approval by the Company’s Board of Directors for the undersigned’s reasonable out-of-pocket expenses incurred in connection with seeking and consummating a Business Combination. 
 4. None of the undersigned, any member of the family of the undersigned, nor any Affiliate of the undersigned will be entitled to receive or accept from the Company a
finder’s fee, broker commission or any other compensation in the event the undersigned, any member of the family of the undersigned or any Affiliate of the undersigned originates a Business Combination. 
 5. The undersigned shall escrow the undersigned’s Insider Shares, subject to the terms of a Securities Escrow Agreement which the Company will enter into with the
undersigned and American Stock Transfer & Trust Company, as escrow agent, in form and substance acceptable to the Company. 
 6. With respect to the
undersigned, the information in the Registration Statement is true and accurate in all respects and does not omit any material information with respect to the undersigned. The undersigned represents and warrants that: 
 6.1 the undersigned is not subject to, or a respondent in, any legal action for any injunction, cease-and-desist order or order or stipulation to desist
or refrain from any act or practice relating to the offering of securities in any jurisdiction; 
 6.2 the undersigned has never been
convicted of or pleaded guilty to any crime (i) involving any fraud; (ii) relating to any financial transaction or handling of funds of another person; (iii) pertaining to any dealings in any securities; or (iv) moral turpitude,
and the undersigned is not currently a defendant in any such criminal proceeding; 
 6.3 the undersigned has never been suspended or expelled
from membership in any securities or commodities exchange or association or had a securities or commodities license or registration denied suspended or revoked; 
 6.4 a petition under any federal bankruptcy laws or any state insolvency law was not filed by or against, nor was a receiver fiscal agent or similar officer appointed by a court for the business or property of the
undersigned, or for any partnership in which the undersigned was a general partner within the past ten years; 
  

 6.5 the undersigned has not been subject to any order prohibiting and is not subject to any legal
proceeding seeking to prohibit the undersigned from engaging in any type of business practice; 
 6.6 the undersigned has not been found by a
court of competent jurisdiction in a civil action by the Securities and Exchange Commission or by any other federal or state administrative or regulatory authority to have violated any federal or state securities law; 
 6.7 the undersigned has not been found by a court of competent jurisdiction in a civil action by the Commodity Futures Trading Commission or by any other
federal or state administrative or regulatory authority to have violated any federal or state commodities law; and 
 6.8 the Company will
not consummate any Business Combination that involves a target acquisition which is affiliated with any of the directors, officers or Affiliates of the Company or with which the undersigned has had any discussions, formal or otherwise, with respect
to a Business Combination prior to the consummation of the IPO. 
 7. This letter agreement shall be binding on the Company and the undersigned and the
undersigned’s respective successors, heirs, personal representatives and assigns. This letter agreement shall terminate on the earlier of (i) the date upon which the Business Combination is consummated and (ii) the date upon which the
liquidation and distribution of the Trust Account is completed, provided that the following Sections shall survive such termination: 3, 4, 5, 7, 8, 9, 10, 11 and 12. 
 8. Reference is made to the lock-up agreement letter by and among the undersigned and the Underwriters, dated as of
                    , 2007, and the undersigned covenants and undertakes to the Company to comply with the terms thereof as if the Company
were a party thereto. 
 9. This letter agreement shall be governed by, and construed in accordance with, the laws of the State of New York applicable to
contracts executed in and to be performed in that State, including, without limitation, Sections 5-1401 and 5-1402 of the New York General Obligations Law and the New York Civil Practice Laws and Rules 327(b). Each of the Company and the undersigned
hereby (i) agrees that any action, proceeding or claim against him or it arising out of or relating in any way to this letter agreement shall be brought and enforced in the courts of the State of New York or the United States District Court for
the Southern District of New York, and irrevocably submits to such jurisdiction, which jurisdiction shall be exclusive and (ii) waives any objection to such exclusive jurisdiction and that such courts represent an inconvenient forum.

 10. Each party hereto hereby irrevocably and unconditionally waives the right to a trial by jury in any action, suit, counterclaim or other proceeding
(whether based on contract, tort or otherwise) arising out of, connected with or relating to this letter agreement. 
  

 11. As used herein: 
 11.1 “Affiliate” shall have the meaning ascribed to it in Rule 12b-2 of the General Rules and Regulations under the Securities Exchange Act of 1934, as amended. 
 11.2. “Business Combination” shall have the meaning set forth in the Amended and Restated Articles of Incorporation of the Company.

 11.3 “Insiders” shall mean each of the following: 
 Richard J. Heckmann 
 Lou L. Holtz 

Alfred E. Osborne, Jr. 
 Dan Quayle

 Heckmann Acquisition, LLC 
 11.4 “Insider Shares” shall mean all of the shares of Common Stock of the Company owned by an Insider prior to the IPO. 
 11.5 “IPO Shares” shall mean the shares of Common Stock comprising the Units issued in the Company’s IPO. 
 11.6 “Private Placement Units” shall mean the Units to be purchased by the undersigned immediately prior to and subject to the consummation of the Company’s IPO, as set forth in that certain Warrant and Unit
Subscription Agreement, dated as of June 21, 2007, by and between the Company and the undersigned. 
 11.7 “Registration
Statement” shall mean the registration statement filed by the Company on Form S-1 (No. 333-                    ) with the Securities
and Exchange Commission on June     , 2007, and any amendment or supplement thereto, in connection with the IPO. 
 11.8 “Trust Account” shall mean the trust account established pursuant to the Trust Agreement, the amounts therein to be released only in the event of the consummation of a Business Combination, a liquidation of the Company
or as otherwise permitted by the Trust Agreement. 
 12. No term or provision of this letter agreement may be amended, changed, waived altered or modified
except by written instrument executed and delivered by the undersigned, the Company and Credit Suisse. 
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left blank] 

			
	Sincerely,
	
	 HECKMANN ACQUISITION, LLC

		
	 By:
	 	  

	 Name:
	 	
	 Title:
	 	

  

			
	 Accepted and agreed:

	
	 HECKMANN CORPORATION

		
	 By:
	 	  

	 Name:
	 	
	 Title:

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