Filed by Bowne Pure Compliance





Exhibit 4.11.2




JOINDER AGREEMENT 




This Joinder Agreement (“Joinder Agreement”) is executed by Brent Kopenhaver and Emilie
Kopenhaver, joint tenants (“Joinder Party”) as of this 30th day of August 2007.



Background




Pure Earth, Inc. (“PEI) and Dynamic Decisions Strategic Opportunities, a Cayman Islands
corporation (“Seller”) are parties to a certain Stock Purchase Agreement dated as of August 17,
2007 (the “Stock Purchase Agreement”). Capitalized terms used herein and not otherwise defined,
shall have the meanings ascribed thereto in the Stock Purchase Agreement. The Stock Purchase
Agreement contemplates that by execution of a Joinder Agreement, Joinder Party may become a party
to the Stock Purchase Agreement as a “Buyer ” thereunder to the extent of such Buyer’s Committed
Amount.



NOW, THEREFORE, in consideration of the foregoing, the undersigned, WITH THE INTENT TO BE
LEGALLY BOUND HEREBY, agrees as follows:



1. The undersigned Joinder Party hereby agrees to become a party to the Stock Purchase
Agreement, and agrees to be bound by and comply with all of the terms and conditions of, and be
entitled to all of the rights and benefits arising from, the Stock Purchase Agreement relating to
“Buyers” (as such term is defined in the Stock Purchase Agreement).



2. The undersigned Joinder Party hereby acknowledges receipt of a copy of the Stock Purchase
Agreement, and that Joinder Party has read and understands the Stock Purchase Agreement.



3. The undersigned Joinder Party hereby acknowledges and agrees that an executed copy of this
Joinder Agreement shall be attached to the Stock Purchase Agreement to evidence the undersigned’s
undertakings hereunder, and that an executed copy of this Joinder Agreement shall be given to each
person who is a party to the Stock Purchase Agreement as well as to the Escrow Agent.



4. The undersigned Joinder Party hereby agrees that its Committed Amount is (50,000) shares of
the PEI Stock.



5. The name, address, telephone number and contact person of Joinder Party’s broker that will
coordinate the Delivery versus Payment transaction for Joinder Party’s Committed Amount is as
follows:



Morgan Stanley

919 Market Street, Suite 300

Wilmington, DE 19801

Attn:          Francis John Ciabattoni, CFP, Senior Vice President          

Tel: 302 657 2043

Fax: 302 657 2049

Francis.ciabattoni@morganstanley.com




6. This Joinder Agreement shall be governed by, construed and enforced in accordance with the
laws of the State of Delaware, without giving effect to principles of conflicts of laws.



IN WITNESS WHEREOF, the undersigned Joinder Party has executed this Joinder Agreement as of
the date first above written.



	 	 	 	 	 	 	 	 	 
	JOINDER PARTY	 	 	 	 	 	 
	 	 	 	 	 	 	ACCEPTED AND AGREED TO:
	 

	 	/s/ Brent Kopenhaver	 	 	 	 	 	 
	 	 	 	 	 	 	 
	Brent Kopenhaver	 	 	 	 	 	 
	 	 	 	 	 	 	PURE EARTH, INC.
	By:

	 	/s/ Emilie Kopenhaver	 	 	 	 	 	 
	 

	 	 	 	 	 	 	 	 
	Emilie Kopenhaver	 	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	Addrress

	 	448 Pine Run Rd.
	 	 	 	By:
	 	/s/Mark Alsentzer
	 

	 	 
	 	 	 	 	 	 
	 

	 	 	 	 	 	 	 	Mark Alsentzer, Chief Executive Officer
	 

	 	Doylestown, PA 18901