Document:

Filed by Bowne Pure Compliance

Exhibit 4.10

DEBENTURE REDEMPTION AGREEMENT

This DEBENTURE Redemption Agreement (the “Agreement”) is made and entered into as of
the 17th day of August, 2007 by and among PURE EARTH, INC., a Delaware corporation (the “Company”)
and DYNAMIC DECISIONS STRATEGIC OPPORTUNITIES, a Cayman Islands corporation (the “Holder”).

BACKGROUND

The Holder is presently the legal, beneficial and registered holder of (i) that certain
$300,000 principal amount, 9% Convertible Debenture Due July 31, 2008 issued by the Company on July
31, 2006 and (ii) that certain $500,000 principal amount, 9% Convertible Debenture Due July 31,
2008 issued by the Company on June 30, 2006 (collectively referred to herein as the “Debentures”).
The Holder now desires to sell, transfer and assign the Debentures to the Company, and the Company
desires to redeem the Debentures from the Holder in accordance with the terms and conditions set
forth in this Agreement (the “Redemption”). The Holder is also the record and beneficial owners of
169,850 shares of the Company’s common stock, acquired by the Holder in open market transactions
(the “PEI Stock”). Contemporaneously with the execution and delivery of this Agreement and as a
condition hereto, Holder will enter into a stock purchase agreement (which shall be fully
assignable and transferable in whole or in part) to purchase the PEI Stock for $2.355 per share,
all as more fully set forth in a Stock Purchase Agreement in the form and substance attached hereto
as Exhibit A.

NOW, THEREFORE, intending to be legally bound, and in consideration of the premises, mutual
covenants, promises, agreements and undertakings, and the representations and warranties contained
herein, the parties hereto agree as follows:

1. Sale and Redemption of Debentures. On the Closing Date (defined below), subject to
the terms and conditions contained in this Agreement, the Holder hereby agrees to sell, transfer,
assign and deliver to the Company, and the Company hereby agrees to purchase by way of redemption
and accept the Debentures (including, without limitation, all rights to receive unpaid interest
thereon, whether or not accrued, and all other rights and benefits incident to the ownership of the
Debentures), for the Purchase Price (as defined below).

2. Purchase Price. On the Closing Date, the Company shall pay to the Holder an
aggregate sum of Five Hundred Fifty Thousand Dollars ($550,000.00) (the “Purchase Price”). As
noted above, the Purchase Price is inclusive of any and all unpaid interest as of the Closing Date.

3. Manner of Payment. The Purchase Price will be paid by wire transfer of immediately
available funds to Holder’s account at JP Morgan Chase Bank. Wire transfer instructions are as
follows:

JP Morgan Chase, New York

ABA 021000021

A/C Morgan Stanley & Co Intl PLC

A/C 400 333139

Rif 04F13610 DDG

4. Closing Date. The “Closing Date” hereunder shall take place on October 4, 2007, or
such other date as the parties shall agree upon in writing, and shall be effected through the
delivery by each party of its deliverables to an escrow agent designated by the Company by written
notice to Holder within ten (10) business days after the date hereof and reasonably acceptable to
Holder, which escrow agent shall be either (i) an attorney licensed to practice law in the State of
New York or the State of Pennsylvania, or (ii) a United States federally or state chartered bank
(herein referred to as the “Escrow Agent ”) as follows:

(a) Within five (5) business days after the notice of designation of the Escrow Agent is
delivered to Holder, the Holder shall deliver to Escrow Agent the original Debentures; and

(b) On or before October 1, 2007, the Company shall deliver to the Escrow Agent, good funds in
the amount of the Purchase Price.

 

 

 

On the Closing Date, assuming each of the Company and the Holder has performed its obligations
described above in this Section 4, the Escrow Agent shall automatically and without any further act
or action on the part of any other party, (i) wire the Purchase Price to the Holder in the manner
set forth in Section 3 above and (ii) deliver the Debentures to the Company for cancellation. The
failure by either the Company or the Holder to timely comply with its obligations set forth herein
shall be a material breach of this Agreement.

5. Representations of the Company. The Company hereby represents and warrants to the
Holder the following:

(a) The Company is a corporation validly existing and in good standing under the laws of the
State of Delaware.

(b) All corporate action required by the Company in connection with the execution of this
Agreement and the consummation of the transactions contemplated hereby has been taken and the
Company is fully authorized to enter into and to perform its obligations under this Agreement.

(c) This Agreement is binding on the Company and is enforceable in accordance with its terms.

6. Representations of the Holder. The Holder hereby represents and warrants to the
Company the following:

(a) As of the date hereof, the Holder is the sole legal, beneficial and registered owner of
the Debentures, free and clear of all liens, charges, encumbrances and claims whatsoever. The
Holder has never pledged, assigned, sold, optioned or otherwise hypothecated or transferred any
right, title, or interest in or to the Debentures to any person. Upon consummation of the
transactions contemplated by this Agreement, Holder shall have transferred good title to such
Debentures to the Company, free and clear of all liens, charges, encumbrances and claims
whatsoever.

(b) The Holder is knowledgeable as to the business and affairs of the Company, its financial
position, and as to the fair value of Holder’s Debentures and its interest in the Company. Holder
has been provided such information, or access thereto, with respect to the Company as Holder has
requested and deems necessary in connection with its decision to enter into this Agreement and the
transactions contemplated hereby.

(c) The Holder has all necessary power and authority under all applicable provisions of law to
execute and deliver this Agreement and to carry out its provisions.

(d) All action on the Holder’s part required for the lawful execution, delivery and
performance of this Agreement has been taken.

(e) This Agreement is binding on the Holder and is enforceable in accordance with its terms.

7. Indemnification by Holder. The Holder agrees to indemnify, defend and hold harmless the
Company from and against all demands, claims, actions or causes of actions, assessments, losses,
damages, liabilities, costs and expenses, including without limitation interest, penalties and
attorneys’ fees and expenses (collectively, the “Liabilities”), resulting from or arising out of
any misrepresentation, breach of representation or warranty or non-fulfillment of any agreement or
covenant on the part of the Holder under this Agreement.

8. Indemnification by the Company. The Company agrees to indemnify, defend and hold harmless
the Holder from and against all Liabilities resulting from or arising out of any misrepresentation,
breach of representation or warranty or non-fulfillment of any agreement or covenant on the part of
the Company under this Agreement.

9. Survival of Representations. Warranties and Covenants. The warranties, representations and
covenants of the parties will survive the closing of the transactions hereunder.

10. Notices. All notices provided for or contemplated herein shall be addressed as
follows and shall be sent via registered or certified mail or overnight delivery or may be sent via
Telecopier, with confirmation of delivery by the transmitting equipment:

 

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	 	If to Seller:
	 	Dynamic Decisions Strategic Opportunities
	 

	 	 	 	Attn: Marta Renzetti
	 

	 	 	 	28 Ives Street
	 

	 	 	 	SW3 2ND London
	 

	 	 	 	Tel: +44 (0)207 590 5560 
	 

	 	 	 	Fax: +44 (0) 207 584 2157 
	 
	 	 	 	 
	 

	 	If to the Buyers or any of them:
	 	c/o Pure Earth, Inc.
	 

	 	 	 	One Neshaminy Interplex, Suite 201 
	 

	 	 	 	Trevose, PA 19053 
	 

	 	 	 	Tel: (215) 639-8755 
	 

	 	 	 	Fax (215) 639-8756 

or to such other addresses as the parties may specify in writing.

11. Governing Provisions.

(a) Each party to this Agreement agrees to perform any further acts and execute and deliver
any documents that may be reasonably necessary to carry out the provisions of this Agreement.

(b) The provisions of this Agreement may be waived, altered, amended, or repealed, in whole or
in part, only on the written consent of all parties to this Agreement.

(c) This Agreement shall be binding upon and shall inure to the benefit of the Company and any
and all successors and assigns of the Company. This Agreement shall be binding upon and inure to
the benefit the Holder and its successors and permitted assigns. This Agreement may be assigned by
the Company and may not be assigned by the Holder.

(d) This Agreement constitutes the entire agreement and understanding of the parties on the
subject matters hereof and supersedes any and all prior and contemporaneous agreements and
understandings of the parties.

(e) It is intended that each paragraph of this Agreement shall be viewed as separate and
divisible and, if any paragraph shall be held to be invalid, the remaining paragraphs shall
continue to be in full force and effect. The headings of paragraphs are for convenience only; they
are not part of this Agreement and shall not affect its interpretation.

(f) This Agreement shall be construed and enforced in accordance with the internal laws of the
State of Delaware. Each party consents to the exclusive jurisdiction and venue of the state and
federal courts located in the City of New York, Borough of Manhattan (the “New York Courts”) for
the resolution of all disputes hereunder. Each party hereto irrevocably waives and agrees not to
assert in any suit, action or proceeding any claim that it is not personally subject to the
jurisdiction of such New York Courts or that the New York Courts are improper or an inconvenient
venue for such proceedings. Each party waives personal service of process and consents to process
being served in any such suit, action or proceeding by mailing a copy thereof of via registered or
certified mail or overnight delivery to such party at the address in effect for notices to it under
this Agreement.

(g) This Agreement may be executed in one or more counterparts, each of which shall be deemed
an original, but all of which together shall constitute one and the same instrument.

(h) No failure or delay on the part of any party to exercise any right, power or remedy shall
operate as a waiver thereof, nor shall any single or partial exercise of any right, power or remedy
preclude any other or further exercise thereof or of any other right, power, or remedy.

 

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IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed and
delivered on the date first above written.

	 	 	 	 	 
	 	 	HOLDER
	 
	 	 	 	 
	 	 	DYNAMIC DECISIONS STRATEGIC OPPORTUNITIES
	 
	 	 	 	 
	 

	 	By:
	 	/s/ Alberto Micalizzi
	 

	 	 	 	 
	 

	 	 	 	Alberto Micalizzi, Chairman
	 
	 	 	 	 
	 	 	COMPANY
	 
	 	 	 	 
	 	 	PURE EARTH, INC.
	 
	 	 	 	 
	 

	 	By:
	 	/s/ Brent Kopenhaver
	 

	 	 	 	 
	 

	 	 	 	Brent Kopenhaver, Executive Vice President,
	 

	 	 	 	Chairman of Board

 

-4-Filed by Bowne Pure Compliance

Exhibit 4.10.1

FIRST AMENDMENT TO DEBENTURE REDEMPTION AGREEMENT

This First Amendment to Debenture Redemption Agreement (the “First Amendment”) is made and
entered into as of the 2nd day of October, 2007 by and among PURE EARTH, INC., a Delaware
corporation (the “Company”) and DYNAMIC DECISIONS STRATEGIC OPPORTUNITIES, a Cayman Islands
corporation (the “Holder”).

BACKGROUND

The parties hereto are parties to a certain Debenture Redemption Agreement, dated as of August
17, 2007 (the “Original Redemption Agreement”) and now desire to amend the same, all as more fully
set forth below. Capitalized terms used herein and not otherwise defined shall have the meanings
ascribed thereto in the Original Redemption Agreement.

NOW, THEREFORE, intending to be legally bound, and in consideration of the premises, mutual
covenants, promises, agreements and undertakings, and the representations and warranties contained
herein, the parties hereto agree as follows:

1. Amendment of Section 4 of the Original Redemption Agreement.

(a) The first sentence of Section 4 of the Original Redemption Agreement is amended to change
the reference to “October 4, 2007” therein to “November 15, 2007”.

(b) Clause (b) of Section 4 of the Original Redemption Agreement is hereby amended and
restated in its entirety as follows:

"(b) At least one business day prior to the Closing Date, the Company
shall deliver to the Escrow Agent, good funds in the amount of the
Purchase Price.”

2. No Other Changes. Other than the amendments set forth above, the Original
Redemption Agreement shall remain in full force and effect and each party hereto hereby ratifies
and confirms that the Original Redemption Agreement, as modified hereby, is enforceable in
accordance with its terms.

3. Governing Provisions.

(a) Each party to this First Amendment agrees to perform any further acts and execute and
deliver any documents that may be reasonably necessary to carry out the provisions of this First
Amendment.

(b) The provisions of this First Amendment may be waived, altered, amended, or repealed, in
whole or in part, only on the written consent of all parties to this First Amendment.

(c) This First Amendment shall be binding upon and shall inure to the benefit of the Company
and Holder and each of their respective successors and permitted assigns.

(d) This First Amendment shall be construed and enforced in accordance with the internal laws
of the State of Delaware. Each party consents to the exclusive jurisdiction and venue of the state
and federal courts located in the City of New York, Borough of Manhattan (the “New York Courts”)
for the resolution of all disputes hereunder. Each party hereto irrevocably waives and agrees not
to assert in any suit, action or proceeding any claim that it is not personally subject to the
jurisdiction of such New York Courts or that the New York Courts are improper or an inconvenient
venue for such proceedings. Each party waives personal service of process and consents to process
being served in any such suit, action or proceeding by mailing a copy thereof of via registered or
certified mail or overnight delivery to such party at the address in effect for notices to it under
this First Amendment.

 

 

 

(e) This First Amendment may be executed in one or more counterparts, each of which shall be
deemed an original, but all of which together shall constitute one and the same instrument.

IN WITNESS WHEREOF, the parties hereto have caused this First Amendment to be duly executed
and delivered on the date first above written.

	 	 	 	 	 
	 	HOLDER

DYNAMIC DECISIONS STRATEGIC OPPORTUNITIES

 	 
	 	By:  	/s/ Alberto Micalizzi
 	 
	 	 	Alberto Micalizzi, Chairman 	 
	 	 	 	 
	 
	 	COMPANY

PURE EARTH, INC.

 	 
	 	By:  	/s/ Mark Alsentzer
 	 
	 	 	Mark Alsentzer, Chief Executive Officer 	 
	 	 	 	 
	 

 

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