Document:

Filed by Bowne Pure Compliance

Exhibit 4.17

INVESTMENT AGREEMENT

THIS INVESTMENT AGREEMENT (this “Agreement”) is made and entered into effective June 29, 2008,
by and among PURE EARTH, INC., a Delaware corporation (the “Company”), BLACK CREEK CAPITAL CORP.
(“Black Creek”), AND CHARLES M. HALLINAN (“Hallinan”) (Black Creek and Hallinan are each referred
to individually as an “Investor,” and collectively, as the “Investors”).

WHEREAS, in May 2007, each Investor purchased from the Company in the aggregate 10,000 shares
of the Company’s Series A Preferred Stock, 10% Coupon (the “Series A Preferred Stock”);

WHEREAS, the Series A Preferred Stock includes both (i) a mandatory conversion feature (the
“Mandatory Conversion Provision”) that requires automatic conversion of the Series A Preferred
Stock into the Company’s common stock, $.001 par value per share (the “Common Stock”), on June 30,
2008 (the “Mandatory Conversion Date”), and (ii) a right (the “Put Right”) that permits the
Investors, beginning after March 1, 2008, to mandate that the Company redeem all or any part of the
Series A Preferred Stock they desire to have redeemed, in each case upon the terms and conditions
set forth in the Pure Earth, Inc. Certificate of Designation of Preferences, Rights, and
Limitations with respect to the Series A Preferred Stock (the “Certificate of Designation”);

WHEREAS, the Company desires to induce the Investors to permit the Series A Preferred Stock to
be converted into Common Stock pursuant to the Mandatory Conversion Provision and to not exercise
their Put Right in whole or in part; and

WHEREAS, the parties desire to set forth their agreements and understandings in writing.

NOW, THEREFORE, in consideration of the mutual promises contained herein, the parties agree as
follows:

1. Conversion of Series A Preferred Stock. As of 12:01 a.m. on the Mandatory Conversion
Date, the Investors agree that all shares of Series A Preferred Stock will automatically and
mandatorily convert into shares of Common Stock pursuant to the terms of the Certificate of
Designation, and the Investors agree not to take any action that would prevent such conversion from
taking place as of the Mandatory Conversion Date.

2. Cash Payment. On each of September 30, 2008, December 31, 2008, March 31, 2009 and June
30, 2009, the Company agrees to pay to each Investor the sum of $12,500.00 in cash.

3. Common Stock Issuance. Within ten (10) business days of the date of this Agreement, the
Company will issue or cause to be issued to each Investor Fifty Five Thousand Five Hundred and
Sixty Seven (55,567) shares of its Common Stock (the “Shares”). The Shares and the certificates representing the Shares shall be subject to all of the transfer restrictions contained
in this Agreement.

 

 

 

4. Representations and Warranties of the Investors. In order to induce the Company to
issue and sell the Shares to the Investors, and understanding that the Shares are being offered and
sold without registration under (i) the Securities Act of 1933, as amended, and in reliance, in
part, upon the exemption provided in Section 4(2) of the Securities Act, and (ii) one or more
exemptions from registration or qualification under the securities laws of one or more states or
other jurisdictions, and that each such exemption depends upon and such securities are being sold
in reliance on, the representation and warranties in this Section 4, each of the Investors
represents and warrants with respect to itself to the Company as follows:

(a) Prior Representations and Warranties Confirmed. All of the representations and
warranties of the Investors contained in that certain Subscription Agreement, dated as of May 17,
2007, by and among the parties hereto, with respect to such Investor’s initial purchase of Series A
Preferred Stock shall have been made and confirmed by each Investor as of the date of this
Agreement with respect to each Investor and the Shares, as if each of such representation and
warranty had been individually set forth herein.

(b) No Brokers. Such Investor has not employed any broker or finder in connection
with the transactions contemplated by this Agreement.

(c) Investment Decision. Such Investor has been furnished with or has had access to
the information it has requested from the Company and has had an opportunity to discuss with
management of the Company the business and financial affairs of the Company, and has generally such
knowledge and experience in business and financial matters and with respect to investments in
securities of privately held companies so as to enable it to understand and evaluate the risks of
an investment in the Shares, and form an investment decision with respect thereto.

5. Transfer Restrictions.

(a) The Investor represents and understands that the sale or transfer of the Shares are
severely restricted and that:

(i) the Shares have not been and will not be registered under the Securities Act or the
laws of any other jurisdiction, by reason of a specific exemption or exemptions from
registration under the Securities Act and applicable state securities laws, and that the and
the Shares must be held indefinitely by such Investor unless a subsequent disposition
thereof is registered under the Securities Act and applicable state securities laws or is
exempt from registration;

(ii) (A) Rule 144 promulgated under the Securities Act (the provisions of which are
known to such Investor) is not currently and may never be available for use by such Investor
for resale of the Shares, (B) that sales of the Shares under Rule 144, if permitted, may be
made only in limited amounts and in accordance with the terms and conditions of that Rule
and that in such cases where the Rule is not applicable, compliance with some other
registration exemption will be required; and (C) the

 

2

 

exemption from registration afforded by Rule 144 depends on the satisfaction of various
conditions and restrictions, including the requirements that, among other things, the
Company (I) shall have had “Form 10” information on file with the Securities and Exchange
Commission” for at least one year, (II) is subject to the reporting requirements of Section
13 or Section 15(d) of the Securities Act, and (III) has filed all reports required to be
filed thereunder for the preceding 12 months (or such shorter time as the Company may have
been required to file such reports), and (D) the Company does not now qualify under Rule 144
and may not ever qualify.

(iii) in no event will the Investor dispose of the Shares (other than in conjunction
with an effective registration statement under the Securities Act or in compliance with Rule
144) unless and until it shall have furnished the Company with an opinion of counsel or
other evidence reasonably satisfactory to the Company to the effect that (A) such
disposition will not require registration under the Securities Act and (B) appropriate
action necessary for compliance with the Securities Act and any applicable state, local or
foreign law has been taken.

(iv) the Company’s reliance on exemptions from registration under the Securities Act
and applicable state securities laws is predicated on the accuracy and completeness of the
Investor’s representations, warranties, acknowledgments and agreements herein, and the
Company is not required to register the Shares or to make any exemption from registration
available;

(v) there may be no public market for the Shares and the Investor may not be able to
sell the Shares; as a result, the Investor must bear the economic risk of an investment in
the Shares for an indefinite period of time;

(vi) the Investor acknowledges that the certificates representing the Shares will bear
the following legend:

“The Shares represented by this certificate have not been registered under
the Securities Act of 1933, as amended, or the securities laws of any state
or other jurisdiction. The Shares may not be offered, sold, transferred,
pledged or otherwise disposed of without an effective registration
statement under the Securities Act of 1933, as amended, and under any
applicable state or other applicable securities laws or an opinion of
counsel for the Company that the proposed transaction will be exempt from
such registration.”

The investor further acknowledges that the Company reserves the right to place a stop order
against the certificate representing the Shares and to refuse to effect any transfers
thereof in the absence of an effective registration statement with respect to the Shares or
in the absence of an opinion of counsel to the Company that such transfer is exempt from
registration under the Securities Act and under applicable state securities laws.

 

3

 

(b) Organization and Good Standing; Residence. If the Investor is Black Creek, the
Investor represents and warrants that it is duly organized, validly existing and in good standing
under the laws of its state of incorporation and that its principal place of business is located in
the State of Kansas. If the Investor is Hallinan, the Investor represents that he is a bona fide
resident and domiciliary (not a temporary or transient resident) of the State of Florida and that
he has no present intention of becoming a resident of any other state or jurisdiction.

6. Indemnification. Each Investor agrees that if such Investor breaches any agreement,
representation or warranty the Investor has made in this Agreement, the Investor hereby agrees to
indemnify and hold harmless the Company, and its respective directors, officers and shareholders,
against any claim, liability, loss, cost, damage or expense (including reasonable attorneys’ fees
and expenses) caused directly or indirectly by the Investor’s breach.

7. Miscellaneous.

(a) Entire Agreement. This Agreement, and the exhibits and schedules attached hereto
(each of which is incorporated herein by reference and made a part hereof), and the other documents
referred to herein constitute the entire understanding among the parties as to the subject matter
specifically referred to herein or therein.

(b) Expenses. Each party shall bear its own expenses incurred in connection with the
negotiation, preparation, execution and delivery of this Agreement, and any subsequent amendments,
modifications or supplements thereto.

(c) Survival of Agreements and Representations and Warranties. All agreements and all
representations and warranties contained herein or made in writing by the Investors shall survive
the execution and delivery of this Agreement and all other documents referred to herein.

(d) Assignment. This Agreement, upon acceptance by the Company, shall bind, benefit,
and be enforceable by and against each party hereto and its successors, assigns, heirs
administrators and executors. This Agreement in not transferable or assignable by an Investor. The
agreements, representations and warranties contained herein shall be deemed to be made by and be
binding upon the Investor and such Investor’s heirs, executors, administrators, other personal
representatives, and their respective successors and permitted assigns.

(e) Governing Law. This Agreement shall be governed in all respects by the laws of
the State of Delaware, without regard to its conflict of laws provisions.

(f) Jurisdiction and Venue. THE PARTIES IRREVOCABLY AND UNCONDITIONALLY SUBMIT TO THE
JURISDICTION OF ANY STATE OR FEDERAL COURTS LOCATED IN THE COMMONWEALTH OF PENNSYLVANIA IN
CONNECTION WITH ANY LEGAL ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT.

(g) Multiple Originals. This Agreement may be executed simultaneously in two or more
counterparts, each of which shall be deemed an original, and it shall not be necessary in making
proof of this Agreement to produce or account for more than one such counterpart.

 

4

 

(h) Severability. If any provision or any portion of any provision of this Agreement
shall be held to be void or unenforceable, the remaining portions of this Agreement shall continue
in full force and effect.

IN WITNESS WHEREOF, each party hereto has caused this Agreement to be duly executed and
delivered as of the day and year first above written.

	 	 	 	 	 
	 	THE COMPANY:

PURE EARTH, INC.

 	 
	 	By:  	/s/ Brent Kopenhaver
 	 
	 	 	Name:  	Brent Kopenhaver 	 
	 	 	Title:  	CFO/EVP 	 
	 

	 	 	 	 	 
	 	INVESTORS:

BLACK CREEK CAPITAL CORP.

 	 
	 	By:  	/s/ Scott Tucker
 	 
	 	 	Name:  	Scott Tucker 	 
	 	 	Title:  	President 	 
	 

	 	 	 	 	 
	 

	 	CHARLES M. HALLINAN	 	 
	 
	 	 	 	 
	 

	 	/s/ Charles M. Hallinan
 

	 	 

 

5Filed by Bowne Pure Compliance

Exhibit 10.7.4

FINAL

FOURTH AMENDMENT TO CREDIT AND SECURITY AGREEMENT

THIS FOURTH AMENDMENT (the “Amendment”), dated as of April 30, 2008, is entered into by and
between PURE EARTH, INC., a Delaware corporation (“Pure Earth”) and all of its wholly owned
subsidiaries, including, but not limited to PURE EARTH MATERIALS, a Pennsylvania corporation, PURE
EARTH TRANSPORTATION & DISPOSAL SYSTEMS, LTD., a Delaware corporation, JUDA CONSTRUCTION, LTD., a
New York corporation, ECHO LAKE BROWNFIELD, LLC, PEI DISPOSAL GROUP, INC., a Delaware corporation,
and PURE EARTH MATERIALS (NJ), INC., a Delaware corporation, (collectively, the “Borrower”) and
WELLS FARGO BANK, NATIONAL ASSOCIATION (the “Lender”), acting through its Wells Fargo Business
Credit operating division.

RECITALS

The Borrower and the Lender are parties to a Credit and Security Agreement dated October 24,
2006 (as amended from time to time, the “Credit Agreement”). Capitalized terms used in this
Amendment have the meanings given to them in the Credit Agreement unless otherwise specified.

The Borrower has requested that certain amendments be made to the Credit Agreement, which the
Lender is willing to make pursuant to the terms and conditions set forth herein. As a condition of
such amendments, Lender has required that Borrower’s wholly owned subsidiaries NEW NYCON, INC., a
Delaware corporation and HFH ACQUISITION CORP., a Delaware corporation (individually, a “Guarantor”
and collectively, the “Guarantors”) execute and deliver a Guaranty of even date herewith.

NOW, THEREFORE, in consideration of the premises and of the mutual covenants and agreements
herein contained, it is agreed as follows:

1. Exhibit B of the Credit Agreement shall be deleted and replaced with Exhibit B attached
hereto.

2. Schedule 5.1 of the Credit Agreement shall be deleted and replaced with a revised Schedule
5.1, which shall be provided to the Lender no later than June 30, 2008.

3. Schedule 5.2 of the Credit Agreement shall be deleted and replaced with a revised Schedule
5.2, which shall be provided to the Lender no later than June 30, 2008.

 

 

 

4. Schedule 5.5 of the Credit Agreement shall be deleted and replaced with a revised Schedule
5.5, which shall be provided to the Lender no later than June 30, 2008.

5. Schedule 6.3 of the Credit Agreement shall be deleted and replaced with a revised Schedule
6.3, which shall be provided to the Lender no later than June 30, 2008.

6. Schedule 6.4 of the Credit Agreement shall be deleted and replaced with a revised Schedule
6.4, which shall be provided to the Lender no later than June 30, 2008.

7. Section 6.6 of the Credit Agreement shall be amended to add subsection (e) as follows:

“(e) The Administrative Borrower may advance up to $300,000, in the aggregate, during each
calendar year, to its subsidiaries Pure Earth Environmental, Inc., Bio Methods, LLC and Geo
Methods, LLC. The Administrative Borrower may advance up to $300,000, during each calendar year,
to New Nycon, Inc. So long as no Default exists, any funds transferred to the Lender from Pure
Earth Environmental, Inc., Bio Methods, LLC and Geo Methods, LLC may be re-advanced to those
entities by the Administrative Borrower and will not be used in calculating the foregoing $300,000
annual intercompany advance. So long as no Default exists, any funds transferred to the Lender
from New Nycon, Inc. may be re-advanced to New Nycon, Inc. by the Administrative Borrower and will
not be used in calculating the foregoing $300,000 annual intercompany advance. Intercompany
advances funded with New Equity shall not be subject to the foregoing covenant.”

8. Formation of New Nycon, Inc. The Borrower may form New Nycon, Inc., as a wholly
owned subsidiary on the following conditions:

	 	a.	 	The Lender shall have a first perfected lien upon and security interest
in all assets of New Nycon, Inc. evidenced by a security agreement acceptable to
the Lender; and
	 
	 	b.	 	New Nycon, Inc. shall guarantee the Indebtedness, unconditionally,
evidenced by a guarantee acceptable to the Lender.

9. Formation of HFH Acquisition Corp. The Borrower may form HFH Acquisition Corp.,
as a wholly owned subsidiary, on the following conditions:

	 	a.	 	The Lender shall have a first perfected lien upon and security interest
in all assets of HFH Acquisition Corp. evidenced by a security agreement acceptable
to the Lender; and
	 
	 	b.	 	HFH Acquisition Corp. shall guarantee the Indebtedness,
unconditionally, evidenced by a guarantee acceptable to the Lender.

 

 

 

10. Consent to Guarantor Loans and Deposit. The Lender consents to HFH Acquisition
Corp. extending the PEI Financing as such term is defined in that certain Membership Interest
Purchase Agreement dated January 14, 2008 (the “MIPA”), executed by and between HFH Acquisition
Corp., Land Resource Solutions, LLC and HFH Hawthorne, LLC. Lender consents to the Deposit, as
such term is defined in the MIPA. Notwithstanding the foregoing, Lender’s consent to the PEI
Financing and the execution of each such transaction’s documents, shall not constitute a consent to
the Closing (as such term is defined in the MIPA) of the transactions set forth in the MIPA.
Lender’s consent to such Closing shall be made subsequent to further analysis by Lender of the MIPA
and the status of the transactions contemplated thereby. Lender also consents to HFH Acquisition
Corp.’s execution of the Hawthorne Financing Documents as such terms are defined in the MIPA.
Lender consents to the Hawthorne Financing, as such term is defined in the MIPA, to the extent the
Hawthorne Financing is funded by the Borrower from New Equity.

11. Consent to Acquisition. The Lender consents to the acquisition by New Nycon, Inc.
of the assets of Nycon, Inc. on terms and conditions set forth in the Asset Purchase Agreement
dated April
 _____ 

, 2008.

12. Delivery of Audited Financial Statements. The Borrower shall deliver the audited
annual financial statements for the fiscal year ending December 31, 2007 required by Section 6.1(a)
of the Credit Agreement no later than April 30, 2008.

13. Advances to Pure Earth Environmental, Inc. Notwithstanding Section 6.6(e) of the
Credit Agreement (as amended hereby), the Borrower may make intercompany loans and advances to Pure
Earth Environmental, Inc. (“PEEI”) up to $300,000 in excess of the amounts set forth in Section
6.6(e) (“Supplemental Advances”) until August 1, 2008 to support two new transportation and
disposal contracts with the City of Stanford, Connecticut and City of Bridgeport, Connecticut. All
Supplemental Advances will be repaid by PEEI to the Borrower by August 1, 2008 and after August 1,
2008, the provisions of Section 6.6(e) of the Credit Agreement shall control. Intercompany
advances funded with New Equity shall not be subject to the foregoing covenant.

14. No Other Changes. Except as explicitly amended by this Amendment, all of the terms
and conditions of the Credit Agreement shall remain in full force and effect and shall apply to any
advance or letter of credit thereunder.

15. Conditions Precedent. This Amendment shall be effective when the Lender shall have
received an executed original hereof, together with each of the following, each in substance and
form acceptable to the Lender in its sole discretion:

(a) The Acknowledgment and Agreement of Guarantors set forth at the end of this Amendment,
duly executed by each Guarantor.

 

 

 

(b) A Certificate of the Secretary of the Borrower certifying as to (i) the resolutions of the
board of directors of the Borrower approving the execution and delivery of this Amendment, (ii) the fact that the articles of incorporation and bylaws of the Borrower, which
were certified and delivered to the Lender pursuant to the Certificate of Authority of the
Borrower’s secretary or assistant secretary dated October 24, 2006 continue in full force and
effect and have not been amended or otherwise modified except as set forth in the Certificate to be
delivered, and (iii) certifying that the officers and agents of the Borrower who have been
certified to the Lender, pursuant to the Certificate of Authority of the Borrower’s secretary or
assistant secretary dated December 29, 2006, as being authorized to sign and to act on behalf of
the Borrower continue to be so authorized or setting forth the sample signatures of each of the
officers and agents of the Borrower authorized to execute and deliver this Amendment and all other
documents, agreements and certificates on behalf of the Borrower.

(c) The Security Agreement and Guaranty of New Nycon, Inc., in form and substance acceptable
to the Lender.

(d) The Security Agreement and Guaranty of HFH Acquisition Corp., in form and substance
acceptable to the Lender.

(e) Current searches of appropriate filing offices showing that no Liens have been filed and
remain in effect against New Nycon, Inc. and HFH Acquisition Corp., except Permitted Liens or Liens
held by Persons who have agreed in writing they will satisfy, release or terminate such Liens in a
manner satisfactory to the Lender.

(f) Certificates of the insurance required under the Credit Agreement, with all hazard
insurance containing a lender’s loss payable endorsement in the Lender’s favor subject to the
rights of any Person having security interests in assets of New Nycon, Inc. and HFH Acquisition
Corp. senior in priority to the right therein in favor of Lender and with all liability insurance
naming the Lender as an additional insured.

(g) Such other matters as the Lender may require.

16. Representations and Warranties. The Borrower hereby represents and warrants to the
Lender as follows:

(a) The Borrower has all requisite power and authority to execute this Amendment and any other
agreements or instruments required hereunder and to perform all of its obligations hereunder, and
this Amendment and all such other agreements and instruments has been duly executed and delivered
by the Borrower and constitute the legal, valid and binding obligation of the Borrower, enforceable
in accordance with its terms.

(b) The execution, delivery and performance by the Borrower of this Amendment and any other
agreements or instruments required hereunder have been duly authorized by all necessary corporate
action and do not (i) require any authorization, consent or approval by any governmental
department, commission, board, bureau, agency or

 

 

 

instrumentality, domestic or foreign, (ii) violate any provision of any law, rule or
regulation or of any order, writ, injunction or decree presently in effect, having applicability to
the Borrower, or the articles of incorporation or by-laws of the Borrower, or (iii) result in a
breach of or constitute a default under any indenture or loan or credit agreement or any other
agreement, lease or instrument to which the Borrower is a party or by which it or its properties
may be bound or affected.

(c) All of the representations and warranties contained in Article V of the Credit Agreement
are correct on and as of the date hereof as though made on and as of such date, except to the
extent that such representations and warranties relate solely to an earlier date.

17. References. All references in the Credit Agreement to “this Agreement” shall be
deemed to refer to the Credit Agreement as amended hereby; and any and all references in the
Security Documents to the Credit Agreement shall be deemed to refer to the Credit Agreement as
amended hereby.

18. No Waiver. The execution of this Amendment and the acceptance of all other
agreements and instruments related hereto shall not be deemed to be a waiver of any Default or
Event of Default under the Credit Agreement or a waiver of any breach, default or event of default
under any Security Document or other document held by the Lender, whether or not known to the
Lender and whether or not existing on the date of this Amendment.

19. Release. The Borrower, and each Guarantor signing the Acknowledgment and Agreement
of Guarantors set forth below, hereby absolutely and unconditionally releases and forever
discharges the Lender, and any and all participants, parent corporations, subsidiary corporations,
affiliated corporations, insurers, indemnitors, successors and assigns thereof, together with all
of the present and former directors, officers, agents and employees of any of the foregoing, from
any and all claims, demands or causes of action of any kind, nature or description, whether arising
in law or equity or upon contract or tort or under any state or federal law or otherwise, which the
Borrower or each Guarantor has had, now has or has made claim to have against any such person for
or by reason of any act, omission, matter, cause or thing whatsoever arising from the beginning of
time to and including the date of this Amendment, whether such claims, demands and causes of action
are matured or unmatured or known or unknown.

20. Costs and Expenses. The Borrower hereby reaffirms its agreement under the Credit
Agreement to pay or reimburse the Lender on demand for all costs and expenses incurred by the
Lender in connection with the Loan Documents, including without limitation all reasonable fees and
disbursements of legal counsel. Without limiting the generality of the foregoing, the Borrower
specifically agrees to pay all fees and disbursements of counsel to the Lender for the services
performed by such counsel in connection with the preparation of this Amendment and the documents
and instruments incidental hereto. The Borrower hereby agrees that the Lender may, at any time or
from time to time in its sole discretion and without further authorization by the Borrower, make a loan to the Borrower under the Credit Agreement, or
apply the proceeds of any loan, for the purpose of paying any such fees, disbursements, costs and
expenses and the fee required under Paragraph 14 of this Amendment.

 

 

 

21. Miscellaneous. This Amendment and the Acknowledgment and Agreement of Guarantors
may be executed in any number of counterparts, each of which when so executed and delivered shall
be deemed an original and all of which counterparts, taken together, shall constitute one and the
same instrument.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the
date first above written.

	 	 	 	 	 	 	 
	WELLS FARGO BANK,	 	 	 	 
	NATIONAL ASSOCIATION	 	PURE EARTH, INC.
	 
	 	 	 	 	 	 
	By:

	 	/s/ Alan I. Cohen
	 	By:
	 	/s/ Brent Kopenhaver
	 

	 	 
	 	 	 	 
	 

	 	Alan I. Cohen
	 	 	 	Brent Kopenhaver
	 

	 	Its Vice President
	 	 	 	Its Executive Vice President
	 
	 	 	 	 	 	 
	 	 	 	 	NEW NYCON, INC.
	 
	 	 	 	 	 	 
	 

	 	 	 	By:
	 	/s/ Brent Kopenhaver
	 

	 	 	 	 	 	 
	 

	 	 	 	 	 	Brent Kopenhaver
	 

	 	 	 	 	 	Its Treasurer
	 
	 	 	 	 	 	 
	 	 	 	 	HFH ACQUISITION CORP.
	 
	 	 	 	 	 	 
	 

	 	 	 	By:
	 	/s/ Brent Kopenhaver
	 

	 	 	 	 	 	 
	 

	 	 	 	 	 	Brent Kopenhaver
	 

	 	 	 	 	 	Its Treasurer

 

 

 

ACKNOWLEDGMENT AND AGREEMENT OF GUARANTORS

The undersigned, each a guarantor of the indebtedness of Pure Earth, Inc. and its wholly owned
subsidiaries (the “Borrower”) to Wells Fargo Bank, National Association (the “Lender”), acting
through its Wells Fargo Business Credit operating division, pursuant to a Guaranty dated December
29, 2006 (the “Guaranty”), hereby (i) acknowledges receipt of the foregoing Amendment; (ii)
consents to the terms (including without limitation the release set forth in Paragraph 19 of the
Amendment) and execution thereof; (iii) reaffirms all obligations to the Lender pursuant to the
terms of the Guaranty; and (iv) acknowledges that the Lender may amend, restate, extend, renew or
otherwise modify the Agreement and any indebtedness or agreement of the Borrower, or enter into any
agreement or extend additional or other credit accommodations, without notifying or obtaining the
consent of the undersigned and without impairing the liability of the undersigned under the
Guaranty for all of the Borrower’s present and future indebtedness to the Lender.

	 	 	 	 	 	 	 
	Geo Methods, LLC	 	Pure Earth Environmental, Inc.
	 
	 	 	 	 	 	 
	By:

	 	/s/ Brent Kopenhaver
	 	By:
	 	/s/ Brent Kopenhaver
	 

	 	 
	 	 	 	 
	 

	 	Brent Kopenhaver
	 	 	 	Brent Kopenhaver
	 

	 	Its Treasurer
	 	 	 	Its Treasurer
	 
	 	 	 	 	 	 
	Address:	 	Address:
	One Neshaminy Interplex, Ste. 201	 	One Neshaminy Interplex, Ste. 201 
	Trevose, PA 19053	 	Trevose, PA 19053 
	Attention: Brent Kopenhaver	 	Attention: Brent Kopenhaver
	 
	 	 	 	 	 	 
	 	 	 	 	Bio Methods, LLC
	 
	 	 	 	 	 	 
	 

	 	 	 	By:
	 	/s/ Brent Kopenhaver
	 

	 	 	 	 	 	 
	 

	 	 	 	 	 	Brent Kopenhaver

Its Treasurer
	 
	 	 	 	 	 	 
	 	 	 	 	Address:
	 
	 	 	 	 	 	 
	 	 	 	 	One Neshaminy Interplex, Ste. 201 
	 	 	 	 	Trevose, PA 19053 
	 	 	 	 	Attention: Brent Kopenhaver

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