Document:

Seventh Amendment of Credit Agreement, dated June 30, 2005

 EXHIBIT 10(ab) 
  
 SEVENTH MODIFICATION IN TERMS AGREEMENT 
  
 THIS SEVENTH MODIFICATION IN TERMS AGREEMENT (the “Modification”), dated effective as of June 30, 2005 (the
“Effective Date”), is entered into by and among MPW Industrial Services Group, Inc. (“MPW Group”), each of the Subsidiaries of MPW Group listed on the Schedule of Subsidiary Borrowers attached hereto, the Lenders listed on the
signature pages of this Modification, and JPMorgan Chase Bank, N.A., successor by merger to Bank One, NA (Main Office Columbus), as Administrative Agent and LC Issuer. 
  
 Background Information 
  
 A. Borrowers, Lenders, Administrative Agent and LC Issuer entered into a certain Credit Agreement, dated as of June 18, 2002, as amended by
(i) a Modification In Terms Agreement, dated as of April 27, 2004, (ii) a Second Modification In Terms Agreement, dated as of August 6, 2004 (iii) a Third Modification In Terms Agreement, dated as of November 12 , 2004,
(iv) a Fourth Modification In Terms Agreement, dated as of February 11 , 2005, (v) a Fifth Modification In Terms Agreement, dated as of March 31, 2005, and (vi) a Sixth Modification In Terms Agreement, dated as of
May 12, 2005 (such credit agreement, as so amended, the “Agreement”). 
  
 B. Pursuant to the Agreement, Lenders have (i) agreed to extend Revolving Loans to Borrowers in the maximum principal amount of $35,000,000, and (ii) extended Term Loans to Borrowers in the original
principal amount of $6,000,000. 
  
 C. Borrowers have requested
that (i) the Facility Termination Date (which is the termination date of the Commitments of the Lenders to extend Revolving Loans to Borrowers) be extended from April 1, 2006 to January 1, 2008, (ii) the Term Loan Maturity Date
be extended from April 1, 2006 to December 31, 2006, and (iii) certain other terms and provisions of the Agreement be modified, and the Lenders are willing to consent to the same, pursuant to the terms and conditions as set forth
herein. 
  
 Provisions 
  
 NOW, THEREFORE, in consideration of their mutual agreements hereunder and
under the Agreement, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Administrative Agent, Borrowers, Lenders and LC Issuer hereby agree as follows: 
  
 1. Capitalized Terms. Except as otherwise defined herein, the
capitalized terms used herein shall have the same meanings as set forth in the Agreement. 

 2. Modification of Certain Definitions. The definition of “Consolidated EBIT” is hereby
amended in its entirety and replaced with the following definition, and a new definition, “Consolidated Income Taxes”, is added as follows: 
  
 “Consolidated EBIT” means Consolidated Net Income (x) plus, to the extent deducted from revenues in determining
Consolidated Net Income, (i) Consolidated Interest Expense and (ii) Consolidated Income Taxes, (y) minus or plus, as the case may be, respectively, equity in earnings (loss) of Affiliates, net of tax, (z) plus,
without duplication, all cash distributions actually received by any Borrower from such Affiliates, all calculated for the Borrowers and their Subsidiaries on a consolidated basis. 
  
 “Consolidated Income Taxes” means, with reference to any period, the taxes on income of the
Borrowers and their Subsidiaries calculated on a consolidated basis for such period. For purposes hereof, Consolidated Income Taxes shall not include franchise taxes, and franchise taxes shall be included in general and administrative expenses.

  

	3.	Modification of Terms. 

  
 (a) Reduction of Aggregate Revolving Commitment. The amount of the Aggregate Revolving Commitment is hereby reduced from $35,000,000 to
$27,000,000 and is subject to further periodic reduction by an amount equal to $300,000 per fiscal quarter, with each such reduction being effective as of the last day of each fiscal quarter during the term hereof commencing on March 31, 2007.
In furtherance of the foregoing, the following definition, as set forth in Article I of the Agreement, is hereby revised and replaced in its entirety by the following: 
  
 “Aggregate Revolving Commitment” means the aggregate of the Revolving Commitments of all the
Revolving Lenders, as reduced from time to time pursuant to the terms hereof. The Aggregate Revolving Commitment is $27,000,000; provided, however, that said sum shall be automatically reduced periodically by an amount equal to $300,000 per fiscal
quarter, with each such reduction being effective as of the last day of each fiscal quarter commencing March 31, 2007. 
  
 (b) Reduction of Revolving Commitments. The Revolving Commitment is hereby reduced commensurately with the reduction of the Aggregate
Revolving Commitment and the following definition, as set forth in Article I of the Agreement, is hereby revised and replaced in its entirety by the following: 
  

“Revolving Commitment” means, for each Revolving Lender, the obligation of such Revolving Lender to make Revolving
Loans to, and participate in Facility LCs issued upon the application of, the Borrowers in an aggregate amount not exceeding the amount set forth below, as it may be modified as a result of any assignment that has become effective pursuant to
Section 12.3.3 or as otherwise modified from time to time pursuant to the terms hereof: 
  

			
	JPMorgan Chase Bank, N.A.	 	- $14,850,000; and
	National City Bank	 	- $12,150,000.

  
 (c) Extension of
Facility Termination Date. The Facility Termination Date shall be extended from April 1, 2006 to January 1, 2008, and the following definition, as set forth in Article I of the Agreement, is hereby revised and replaced in its
entirety by the following: 
  
 “Facility
Termination Date” means January 1, 2008 or any later date as may be specified as the Facility Termination Date in accordance with Section 2.20 or any earlier date on which the Aggregate Revolving Commitment is reduced to zero or
otherwise terminated pursuant to the terms hereof. 
  

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 (d) Extension of Term Loan Maturity Date. The Term Loan Maturity Date shall be extended
from April 1, 2006 to December 31, 2006, and the following definition, as set forth in Article I of the Agreement, is hereby revised and replaced in its entirety by the following: 
  
 “Term Loan Maturity Date” means December 31,
2006. 
  
 (e) Continuation of Term Loan Payments.
The quarterly principal installments payable with respect to the Term Loans shall continue uninterrupted and Section 2.3(ii) of the Agreement is hereby revised and replaced in its entirety by the following: 
  
 (ii) The principal of the Term Loans shall be payable in
installments of $300,000 each, which shall be due and payable on each Payment Date, commencing with the first such date to occur after the date of this Agreement, and all remaining outstanding principal of the Term Loans shall be due and payable on
the Term Loan Maturity Date. 
  
 (f) Increase to Facility LC
Sublimit. The Facility LC Sublimit shall be increased from $5,500,000 to $6,000,000; provided, however, that the maximum amount of the Aggregate Outstanding Revolving Credit Exposure, including the Facility LC Sublimit as so increased, shall
remain at $27,000,000. In furtherance of the foregoing, Section 2.19.1 of the Agreement is hereby revised and replaced in its entirety by the following: 
  

2.19.1. Issuance. The LC Issuer hereby agrees, on the terms and conditions set forth in this Agreement, to issue documentary and
standby letters of credit (each, a “Facility LC”) and to renew, extend, increase, decrease or otherwise modify each Facility LC (“Modify,” and each such action a “Modification”), from time to time from and including the
date of this Agreement and prior to the Facility Termination Date upon the request of the Borrowers; provided that immediately after each such Facility LC is issued or Modified, (i) the aggregate amount of the outstanding LC Obligations
shall not exceed $6,000,000 and (ii) the Aggregate Outstanding Revolving Credit Exposure shall not exceed the Aggregate Revolving Commitment. No Facility LC shall have an expiry date later than the earlier of (x) the fifth Business Day
prior to the Facility Termination Date and (y) one year after its issuance. 
  
 (g) Revised Pricing Schedule. The Schedule originally attached to the Agreement as the Pricing Schedule is hereby revised and replaced with the Revised Pricing Schedule attached hereto as Exhibit
“A,” which is hereby incorporated into the Agreement in its entirety and shall for all purposes from the effective date hereof constitute the “Pricing Schedule.” 
  

 3 

 (h) Debt Service Coverage Ratio. The minimum debt service coverage ratio required under
Section 6.25.1 of the Agreement is hereby modified, Section 6.25.1 of the Agreement is hereby deleted in its entirety, and the following Sections 6.25.1.1 and 6.25.1.2 are hereby added to the Agreement in replacement thereof: 

 
 6.25.1.1 Initial Debt Service Coverage Ratio. The
Borrowers will not permit the ratio (“Initial DSCR”), determined as of the end of each of their fiscal quarters for the then most-recently ended four fiscal quarters from the date hereof through and including December 31, 2006 (at
which time the Term Loans shall be paid in full), of (i) Consolidated EBITDA minus Adjusted Capital Expenditures, to (ii) the sum of (x) Consolidated Interest Expense, plus (y) Consolidated Income Taxes paid,
plus (z) current maturities of long term Consolidated Funded Indebtedness, but excluding (A) the outstanding balance of the Revolving Loans and (B) the amount of the “balloon” payment due upon maturity of the
Term Loan (being $1,499,475) to be less than: 
  

	 	(1)	1.20 to 1.00 for the fiscal quarter ending June 30, 2005; and 

  

	 	(2)	1.00 to 1.00 for the fiscal quarter ending September 30, 2005; 

  

	 	(3)	1.05 to 1.00 for the fiscal quarter ending December 31, 2005; and 

  

	 	(4)	1.20 to 1.00 for each fiscal quarter ending March 31, June 30, September 30 and December 31, 2006. 

  
 The Borrowers may restate the results of their fiscal quarters ended prior to
September 30, 2005 to reflect the change in definitions of “Consolidated EBIT” and “Initial DSCR” and the new definition of “Consolidated Income Taxes” to the extent that such quarters are used in the calculation
of Initial DSCR.” 
  
 6.25.1.2 Post-2006
Debt Service Coverage Ratio. The Borrowers will not permit the ratio (“Post-2006 DSCR”), determined as of the end of each of their fiscal quarters for the then most-recently ended four fiscal quarters commencing with the fiscal quarter
ending March 31, 2007, of (i) Consolidated EBITDA minus Adjusted Capital Expenditures, to (ii) the sum of (A) Consolidated Interest Expense, plus (B) Consolidated Income Taxes paid, plus (C) current
maturities of long term Consolidated Funded Indebtedness, but excluding the outstanding balance of the Revolving Loans, plus (D) the sum of $1,200,000, to be less than 1.20 to 1.00. 
  
 Further, the following terms shall, for purposes of
calculating the Initial DSCR under Section 6.25.1.1 and the Post-2006 DSCR under 6.25.1.2, and, with respect to “Anticipated Purchases” for purposes of Section 6.16, have the meanings set forth below: 
  
 “Adjusted Capital Expenditures” means the greater
of (herein, “Actual Capital Expenditures”): (i) LTM Capital Expenditures or (ii) fifty percent (50%) of LTM Depreciation Expense; adjusted as follows: for purposes of calculating the Initial DSCR as of the last day of June,
September and December 2005, and as of March and June 2006, Actual Capital Expenditures made during the fiscal quarter ending June 30, 2005 shall be reduced by an amount equal to $729,000 and Actual Capital Expenditures made during the fiscal
quarter ending September 30, 2005 shall be reduced by an amount equal to $2,286,000; provided, however, that no such adjustment shall be made unless Borrowers consummate the Anticipated Purchases. 
  

 4 

 “LTM Capital Expenditures” means Consolidated Capital Expenditures made in the
prior 12 fiscal months. 
  
 “LTM
Depreciation Expense” means Consolidated Depreciation Expense charged in the prior 12 fiscal months. 
  
 “Consolidated Depreciation Expense” means, with reference to any period, the depreciation expense of the Borrowers and their
Subsidiaries calculated on a consolidated basis for such period. 
  
 “Anticipated Purchases” means the purchase by Borrowers of the Hi-Vac Supersucker for the Amren contract, the purchase of the Twin 500 HP Water Blasters, and the purchase of the King Air Aircraft, in amounts
approximating $1,083,000, $953,000 and $750,000, respectively, during the fiscal quarter ending September 30, 2005. 
  
 The Borrowers may restate the results of their fiscal quarters ended prior to September 30, 2005 to reflect the change in definitions of
“Consolidated EBIT”, the definitions set forth above in this Section 6.25.1.2, and the new definition of “Consolidated Income Taxes” to the extent that such quarters are used in the calculation of Post-2006 DSCR. 

 
 (i) Leverage Ratio. The maximum Leverage Ratio permitted
under Section 6.25.2 is hereby modified, and Section 6.25.2 of the Agreement is hereby revised and replaced in its entirety by the following: 
  
 6.25.2. Leverage Ratio The Borrowers will not permit the Leverage Ratio, determined as of the end of each of its fiscal quarters,
to be greater than: 
  

	 	(i)	2.75 to 1.00 for the fiscal quarter ended June 30, 2005; 

  

	 	(ii)	3.10 to 1.00 for the fiscal quarter ended September 30, 2005; 

  

	 	(iii)	2.90 to 1.00 for the fiscal quarter ended December 31, 2005; and 

  

	 	(iv)	2.75 to 1.00 for the fiscal quarter ended March 31, 2006 and for each fiscal quarter thereafter. 

  
 Further, notwithstanding anything contained in the Agreement to the contrary, the term Consolidated Funded
Indebtedness shall have the meaning set forth below for purposes of calculating the Leverage Ratio: 
  
 “Consolidated Funded Indebtedness” means at any time the aggregate dollar amount of (i) Consolidated Indebtedness which has
actually been funded and is outstanding at such time, whether or not such amount is due or payable at such time, plus (ii) Contingent Obligations of Borrowers and their Subsidiaries calculated on a consolidated basis. Outstanding Letters
of Credit shall constitute Consolidated Funded Indebtedness and the 
  

 5 

 obligations of MPW Group pursuant to Guaranties of Lease (as amended from time to time), dated
April 1, 1999 and July 1999, in favor of Met Center Partners-3, Ltd. in connection with the lease by Pentagon Technologies, Inc. in Austin, Texas, shall not be a Contingent Obligation for purposes of the calculation of Consolidated Funded
Indebtedness. 
  
 The Borrowers may restate the results of their
fiscal quarters ended prior to September 30, 2005 to reflect the change in definitions of “Consolidated EBIT” and “Consolidated Funded Indebtedness” to the extent that such quarters are used in the calculation of the
Leverage Ratio. 
  
 (j) Minimum Tangible Net Worth.
The minimum Consolidated Tangible Net Worth which Borrowers are required to maintain is hereby modified, and Section 6.25.3 of the Agreement is hereby revised and replaced in its entirety by the following: 
  
 6.25.3. Minimum Tangible Net Worth. The Borrowers
will at all times maintain Consolidated Tangible Net Worth of not less than the sum of (i) $15,000,000 plus (ii) (x) 60% of Consolidated Net Income earned in each fiscal quarter, beginning with the quarter ending June 30, 2005
(without deduction for losses), and (y) 100% of the net proceeds from the issuance and sale of equity securities of any Borrower or any Subsidiary, including proceeds from the exercise of employee stock options. 
  
 (k) Capital Expenditures. The maximum amount of permitted
Consolidated Capital Expenditures is hereby modified and Section 6.16 of the Agreement is hereby revised and replaced in its entirety by the following: 
  
 6.16. Capital Expenditures. Each Borrower will not, nor will it permit any Subsidiary to, expend, or be committed to expend, in
excess of the following amounts for Consolidated Capital Expenditures during any one fiscal year in the aggregate: (i) $8,200,000 during fiscal year 2006, inclusive of the Anticipated Purchases provided that the Anticipated Purchases are
consummated during the fiscal quarter ending September 30, 2005; provided, further, that said sum ($8,200,000) shall be reduced by the aggregate amount of the Anticipated Purchases not consummated during the fiscal quarter ending
September 30, 2005; and (ii) $6,500,000 during any fiscal year thereafter. If Consolidated Capital Expenditures are less than the foregoing permitted amounts (y) during fiscal year 2006, the unused available amount, and/or
(z) during any fiscal year thereafter, the unused available amount up to $1,000,000, may be carried over to the following fiscal year for Consolidated Capital Expenditures; provided, in each case, that the Lenders consent to any such
carry-over. 
  
 (l) Permitted Acquisitions.
Acquisitions by Borrowers and their Subsidiaries permitted without the prior written consent of the Lenders shall be reduced and subpart (iv) of Section 6.14 of the Agreement is hereby revised and replaced in its entirety by the following:

  
 (iv) Other Acquisitions in an aggregate
amount not exceeding $2,000,000 during any fiscal year, which Acquisitions may include repurchases of outstanding shares of MPW Group in an aggregate amount not exceeding $250,000 during any fiscal year. 
  

 6 

 (m) Dividends and Distributions Prohibited. Dividends and distributions by the Borrowers
and their Subsidiaries shall be restricted, and Section 6.10 of the Agreement is hereby revised and replaced in its entirety by the following: 
  
 6.10. Dividends. Each Borrower will not, nor will it permit any Subsidiary to, declare or pay any dividends or make any distributions on
its capital stock (other than dividends payable in its own capital stock or other ownership interest) or redeem, repurchase or otherwise acquire or retire any of its capital stock at any time outstanding, except that any Subsidiary (including any
Borrower) may declare and pay dividends or make distributions to MPW Group or to a Wholly-Owned Subsidiary, and MPW Group may repurchase outstanding shares of its capital stock in an aggregate amount not exceeding $250,000 during any fiscal year.

  
 (n) Rentals Limited. The maximum permitted
amount of rentals by Borrowers and their Subsidiaries in any fiscal year is hereby reduced and Section 6.17 of the Agreement is hereby revised and replaced in its entirety by the following: 
  
 6.17. Rentals. Each Borrower will not, nor will it permit
any Subsidiary to, create, incur or suffer to exist obligations for Rentals in excess of $3,750,000 in the aggregate during any one fiscal year on a non-cumulative basis for the Borrowers and their Subsidiaries. 
  
 (o) Missouri Mortgage. On or before October 31, 2005, the
applicable Borrower(s) shall execute and deliver such mortgages, deeds of trust or other appropriate instruments reasonably required by the Lenders, each in form and substance satisfactory to the Agent and Agent’s Counsel, pursuant to which a
mortgage lien and security interest shall be granted in favor of Agent, for the ratable benefit of the Lenders, encumbering the real estate owned by such Borrower(s) and located in Sedalia, Missouri. 
  
 4. Conditions to Lender’s Obligations. The agreement of Lenders
and LC Issuer to enter into this Modification, and for Lenders and LC Issuer to be bound by the terms hereof, are subject to the satisfaction of the following conditions precedent: 
  
 (a) Delivery of Documents. On or prior to the execution of this Modification, Administrative Agent
shall have received such certificates, documents and other items as Administrative Agent, in its reasonable discretion, deems necessary or desirable. 
  
 (b) Representations and Warranties. The representations and warranties made by Borrowers in this Modification shall be true and
correct in all material respects as of the date of this Modification. 
  

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 (c) Loan Modification Fee. Borrower shall pay to Agent, for the ratable benefit of
the Lenders, a loan modification and extension fee equal to $54,000. 
  
 5. Exhibits and Schedules. Each Borrower confirms and warrants that the information set forth in all schedules and exhibits, as amended by this Modification, to the Agreement is true, accurate and complete as of the date hereof.

  
 6. Representations and Warranties; No Defaults. Each
Borrower hereby represents and warrants to Lenders, LC Issuer and Administrative Agent that the following are true and correct as of the date of this Modification: 
  
 (a) except as otherwise disclosed to the Lenders, Administrative Agent and LC Issuer, the representations
and warranties of each Borrower contained in the Agreement are true and correct on and as of the date of this Modification as if made on and as of such date, unless stated to relate to a specific earlier date, in which case they were true, correct
and complete in all material respects on and as of such earlier date; 
  
 (b) except as otherwise disclosed to the Lenders, Administrative Agent and LC Issuer, all financial statements and information of Borrowers provided to Administrative Agent and Lenders are true, accurate and complete
in all material respects as of the date of, and for the periods covered by, such financial statements and information; 
  
 (c) neither this Modification nor any other document, certificate or written statement furnished to Administrative Agent and/or Lenders or
to special counsel to Administrative Agent by or on behalf of any Borrower in connection with the transactions contemplated hereby contains any untrue statement of a material fact or omits to state a material fact necessary in order to make the
statements contained herein and therein not misleading; 
  
 (d) each Borrower has full power and authority (i) to execute, deliver and perform this Modification, and (ii) to incur the obligations provided for herein and therein, all of which have been duly authorized
by all necessary and proper action by each Borrower; 
  
 (e) no consent, waiver or authorization of, or filing with, any person, entity or governmental authority is required to be made or obtained by any Borrower in connection with the execution, delivery, performance, validity or enforceability
of this Modification; 
  
 (f) this Modification
constitutes the legal, valid and binding obligation of Borrowers, enforceable against Borrowers in accordance with its terms; 
  
 (g) giving effect to the changes to the Agreement contemplated by this Modification, no Unmatured Default nor Default has occurred and is
continuing; 
  
 (h) no event has occurred which
would have a Material Adverse Effect; and 
  

 8 

 (i) the execution and delivery by Borrowers of this Modification and the performance by
Borrowers of this Modification and the transactions contemplated hereby: (i) do not and will not violate any law or regulation; (ii) do not and will not violate any order, decree or judgment by which any Borrower is bound; (iii) do
not and will not violate or conflict with, result in a breach of or constitute (with notice, lapse of time, or otherwise) a default under any material agreement, mortgage, indenture or other contractual obligation to which any Borrower is a party,
or by which any Borrower’s properties are bound; or (iv) do not and will not result in the creation or imposition of any lien upon any property or assets of any Borrower. 
  
 7. Reaffirmation of Liability. Subject to the terms and conditions contained herein, each Borrower hereby reaffirms
its liability to Lender under the Agreement, the Collateral Documents, the Notes, the other Loan Documents and all other agreements and instruments executed by Borrowers for the benefit of Administrative Agent, Lenders or LC Issuer in connection
with the Agreement and the Revolving Loans and the Term Loans (collectively, the “Bank Documents”). Without limiting the generality of the foregoing, each Borrower reaffirms all of its payment obligations, including with respect to the
Revolving Loans and the Term Loans under the Agreement and the Notes and with respect to the LC Obligations. In addition, each Borrower agrees that Administrative Agent, each Lender and LC Issuer have performed all of their obligations under the
Bank Documents and that none of Administrative Agent, any Lender or LC Issuer is in default under any obligation any of them has or ever did have to any Borrower under the Bank Documents or any other agreement. As a specific inducement and
consideration to Lenders, Administrative Agent and LC Issuer to enter into this Modification and agree to the transactions contemplated hereby, each Borrower hereby waives and releases each Lender, Administrative Agent and LC Issuer, their
respective officers, directors, employees and representatives, from any and all claims or causes of actions, if any, accruing on or before the date hereof and arising out of the past and/or present business relationship among each Borrower and each
Lender, Administrative Agent or LC Issuer which any Borrower now has or may have or in the future may have against any Lender, Administrative Agent or LC Issuer or any of their respective officers, directors, employees or representatives.

  
 8. Effectiveness of Modification. All of the terms,
covenants and conditions of, and the obligations of Borrowers under, the Bank Documents shall remain in full force and effect as modified hereby. 
  
 9. Preservation of Existing Security Interests. Each mortgage, security interest, pledge, assignment, lien or other conveyance or encumbrance of
any right, title, or interest in any property of any kind delivered to Administrative Agent for the benefit of Lenders at any time by any Borrower or any other Person in connection with the Bank Documents or to secure the performance of the
obligations of Borrowers under the Bank Documents, including pursuant to the Collateral Documents, shall remain in full force and effect following the execution of this Modification. Each Borrower hereby authorizes the Lenders and the Administrative
Agent to file all UCC financing statements, amendments of existing UCC financing statements and correction statements with respect to UCC financing statements and other documents that the Administrative Agent deems necessary or desirable in
connection with any such security interests, including to file initial financing statements and amendments thereto that (x) indicate the collateral (i) as all assets and/or 

  

 9 

 
personal property of each Borrower or words of similar effect, regardless of whether any particular asset comprised in the collateral falls within the scope
of Article 9 of the Ohio Uniform Commercial Code, or (ii) as being of an equal or lesser scope or with greater detail, and (y) provide any other information required by part 5 of Article 9 of the Ohio Uniform Commercial Code, for the
sufficiency or filing office acceptance of any financing statement or amendment. 
  
 10. Expenses. Borrowers shall reimburse Administrative Agent for any costs, internal charges and out-of-pocket expenses (including reasonable attorneys’ fees and time charges of attorneys for
Administrative Agent and Lenders, which attorneys may be employees of Administrative Agent and Lenders) paid or incurred by Administrative Agent and Lenders in connection with the preparation, negotiation, execution, delivery, performance, review,
amendment, modification, and administration of this Modification, the Agreement and the other Bank Documents. Borrowers also agree to reimburse Administrative Agent for any costs, internal charges and out-of-pocket expenses (including reasonable
attorneys’ fees and time charges of attorneys for Administrative Agent and Lenders, which attorneys may be employees of Administrative Agent and Lenders) paid or incurred by Administrative Agent and Lenders in connection with the collection and
enforcement of the Agreement and the other Bank Documents. 
  
 11.
Applicable Law. This Modification shall be construed in accordance with the internal laws (but without regard to the conflict of laws provisions) of the State of Ohio, but giving effect to federal laws applicable to national banks.

  
 12. Severability. Any provision of this Modification
that is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective only to the extent of such prohibition or unenforceability, without invalidating the remaining provisions hereof or affecting the validity or
enforceability of such provision in any other jurisdiction. 
  
 13. Counterparts. This Modification 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. 
  
 14. Amendments and Supplements. This Modification may not be amended
or supplemented except by an instrument in writing executed by Borrowers and Administrative Agent. 
  
 15. Covenants to Survive, Binding Agreement. This Modification shall be binding upon and inure to the benefit of Borrowers, Lenders, Administrative
Agent and LC Issuer and their respective successors or assigns; provided, however, that Borrowers may not assign or otherwise dispose of any of their rights or obligations hereunder. 
  
 16. Entire Agreement. This Modification embodies the entire agreement and understanding among Borrowers,
Administrative Agent, Lenders and LC Issuer relating to, and supersedes all prior agreements and understandings among Borrowers, Administrative Agent, Lenders and LC Issuer relating to, the subject matter hereof. 
  

 10 

 17. Headings. The headings of the sections of this Modification are for convenience only and shall
not affect the meaning or interpretation of this Modification. 
  
 18. Interpretation. This Modification is to be deemed to have been prepared jointly by the parties hereto, and any uncertainty or ambiguity existing herein shall not be interpreted against any party but shall be interpreted according
to the rules for the interpretation of arm’s length agreements. 
  
 19. WAIVER OF JURY TRIAL. EACH BORROWER, ADMINISTRATIVE AGENT, LC ISSUER AND EACH LENDER HEREBY WAIVE TRIAL BY JURY IN ANY JUDICIAL PROCEEDING INVOLVING, DIRECTLY OR INDIRECTLY, ANY MATTER (WHETHER SOUNDING IN TORT,
CONTRACT OR OTHERWISE) IN ANY WAY ARISING OUT OF, RELATED TO, OR CONNECTED WITH ANY LOAN DOCUMENT OR THE RELATIONSHIP ESTABLISHED THEREUNDER. 
  
 IN WITNESS WHEREOF, the parties hereto entered into this Modification to be effective as of the Effective Date. 
  

			
	BORROWERS:
	
	MPW Industrial Services Group, Inc.
		
	By:	 	 /s/ Robert Valentine

		
	Name:	 	Robert Valentine
		
	Title:	 	VP-COO/CFO
	
	Each of the Other Borrowers Listed
on the Schedule of Subsidiary Borrowers
		
	By:	 	 /s/ Robert Valentine

		
	Name:	 	Robert Valentine
		
	Title:	 	VP-COO/CFO

  
 [Signatures of
Lenders, Administrative Agent and LC Issuer on Following Pages] 
  

 11 

			
	JPMorgan Chase Bank, N.A., a national banking
	 association and successor by merger to Bank One, NA (Main Office Columbus),
     as a Lender and as Administrative Agent and LC Issuer

		
	By:	 	 /s/ Geoffrey M. Eagleson

	 	 	Geoffrey M. Eagleson, Senior Vice President

  

 12 

			
	NATIONAL CITY BANK, a national banking association, as a Lender
		
	By:	 	 /s/ Robert C. Wolfinger

	 	 	Robert C. Wolfinger, Senior Vice President

  

 13 

 SCHEDULE OF SUBSIDIARY BORROWERS 
  
 Aquatech Environmental, Inc. 
 MPW Industrial Services, Inc. 
 MPW Management Services Corp. 
 MPW Industrial Water Services, Inc. 
 MPW Container Management Corp. 
 MPW Container Management Corp. of Michigan 
 MPW Industrial Services of Indiana, LLC

 MPW Industrial Cleaning Corp. 

 EXHIBIT “A” 
  
 REVISED PRICING SCHEDULE 
  

													
	 APPLICABLE
 MARGIN

	  	 LEVEL I
 STATUS

	 	 	 LEVEL II
 STATUS

	 	 	 LEVEL III
 STATUS

	 	 	 LEVEL IV
 STATUS

	 
	 Eurodollar Rate
	  	1.75	%	 	2.00	%	 	2.25	%	 	2.50	%
	 Floating Rate
	  	0.125	%	 	0.375	%	 	0.625	%	 	0.875	%
	  
 APPLICABLE FEE
 RATE

	  	 LEVEL I
 STATUS

	 	 	 LEVEL II
 STATUS

	 	 	 LEVEL III
 STATUS

	 	 	 LEVEL IV
 STATUS

	 
	 Commitment Fee
	  	0.35	%	 	0.40	%	 	0.45	%	 	0.50	%

  
 For the purposes of
this Schedule, the following terms have the following meanings, subject to the final paragraph of this Schedule: 
  
 “Financials” means the annual or quarterly financial statements of the Borrowers and their Subsidiaries delivered pursuant to
Section 6.1(i) or (ii). 
  
 “Level I Status” exists
at any date if, as of the last day of the fiscal quarter of the Borrowers referred to in the most recent Financials, the Leverage Ratio is less than 1.75 to 1.0. 
  
 “Level II Status” exists at any date if, as of the last day of the fiscal quarter of the Borrowers referred to in
the most recent Financials, (i) the Borrowers have not qualified for Level I Status and (ii) the Leverage Ratio is less than 2.25 to 1.0. 
  
 “Level III Status” exists at any date if, as of the last day of the fiscal quarter of the Borrowers referred to in the most recent Financials,
(i) the Borrowers have not qualified for Level I Status or Level II Status and (ii) the Leverage Ratio is less than 2.75 to 1.0. 
  
 “Level IV Status” exists at any date if, as of the last day of the fiscal quarter of the Borrowers referred to in the most recent financials,
the Borrowers have not qualified for Level I Status, Level II Status or Level III Status, and an Event of Default has not occurred.Secured Promissory Note

 Exhibit 10.1 
  
 THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS
OF ANY STATE, AND HAVE BEEN ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE SALE OR DISTRIBUTION THEREOF. NO SUCH SALE OR DISTRIBUTION MAY BE EFFECTED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN
OPINION OF COUNSEL IN A FORM SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR THE APPLICABLE SECURITIES LAWS OF ANY STATE. 
  
 SECURED PROMISSORY NOTE 
  

			
	$775,000.00	 	September 29, 2005
	 	 	Clearwater, Florida

  
 For value received,
Digital Lightwave, Inc., a Delaware corporation (the “Company”), promises to pay to Optel Capital, LLC, a Delaware limited liability company (the “Holder”), or its registered assigns, the principal sum of Seven
Hundred Seventy Five Thousand Dollars ($775,000.00). Interest shall accrue from the date of this Note on the unpaid principal amount at a rate equal to 10.0% per annum, compounded annually. The interest rate shall be computed on the basis of
the actual number of days elapsed and a year of 360 days. This Note is subject to the following terms and conditions. 
  
 1. Maturity. 
  
 (a) Principal and any accrued but unpaid interest under this Note shall be due and payable upon demand by the Holder at any time after December 31,
2005. 
  
 (b) Notwithstanding the foregoing, the entire unpaid
principal sum of this Note, together with accrued and unpaid interest thereon, shall become immediately due and payable upon demand by the Holder at any time on or following the occurrence of any of the following events: 
  
 (i) the sale of all or substantially all of the Company’s assets, or
any merger or consolidation of the Company with or into another corporation; other than a merger or consolidation in which the holders of more than 50% of the shares of capital stock of the Company outstanding immediately prior to such transaction
continue to hold (either by the voting securities remaining outstanding or by their being converted into voting securities of the surviving entity) more than 50% of the total voting power represented by the voting securities of the Company, or such
surviving entity, outstanding immediately after such transaction; 
  
 (ii) the inability of the Company to pay its debts as they become due; 

 (iii) the dissolution, termination of existence, or appointment of a receiver, trustee or custodian, for
all or any material part of the property of, assignment for the benefit of creditors by, or the commencement of any proceeding by the Company under any reorganization, bankruptcy, arrangement, dissolution or liquidation law or statute of any
jurisdiction, now or in the future in effect; 
  
 (iv) the
execution by the Company of a general assignment for the benefit of creditors; 
  
 (v) the commencement of any proceeding against the Company under any reorganization, bankruptcy, arrangement, dissolution or liquidation law or statute of any jurisdiction, now or in the future in effect, which is not
cured by the dismissal thereof within ninety (90) days after the date commenced; or 
  
 (vi) the appointment of a receiver or trustee to take possession of the property or assets of the Company. 
  
 2. Payment; Prepayment. All payments shall be made in lawful money of the United States of America at such place as the Holder hereof may
from time to time designate in writing to the Company. Payment shall be credited first to the accrued interest then due and payable and the remainder applied to principal. Prepayment of this Note may be made at any time without penalty. 

 
 3. Transfer; Successors and Assigns. The terms and
conditions of this Note shall inure to the benefit of and be binding upon the respective successors and assigns of the parties. This Note may be transferred only upon surrender of the original Note for registration of transfer, duly endorsed, or
accompanied by a duly executed written instrument of transfer in form satisfactory to the Company. Thereupon, a new note for the same principal amount and accrued interest will be issued to, and registered in the name of, the transferee. Interest
and principal are payable only to the registered holder of this Note. 
  
 4. Governing Law. This Note and all acts and transactions pursuant hereto and the rights and obligations of the parties hereto shall be governed, construed and interpreted in accordance with the laws of the State of Florida,
without giving effect to principles of conflicts of law. 
  
 5.
Notices. Any notice required or permitted by this Agreement shall be in writing and shall be deemed sufficient upon receipt, when delivered personally or by courier, overnight delivery service or confirmed facsimile, or 48 hours after
being deposited in the U.S. mail as certified or registered mail with postage prepaid, if such notice is addressed to the party to be notified at such party’s address or facsimile number as set forth below or as subsequently modified by written
notice. 
  
 6. Amendments and Waivers. Any term of
this Note may be amended only with the written consent of the Company and the Holder. Any amendment or waiver effected in accordance with this Section 6 shall be binding upon the Company, each Holder and each transferee of this Note.

  

 -2- 

 7. Officers and Directors Not Liable. In no event shall any officer or director of the
Company be liable for any amounts due or payable pursuant to this Note. 
  
 8. Security Interest. This Note is secured by all of the assets of the Company in accordance with the Twenty Second Amended and Restated Security Agreement by and between the Company and the Holder dated as of
September 16, 2004 (the “Security Agreement”). In case of an Event of Default (as defined in the Security Agreement), the Holder shall have the rights set forth in the Security Agreement. 
  
 9. Counterparts. This Note may be executed in any number of
counterparts, each of which will be deemed to be an original and all of which together will constitute a single agreement. 
  
 10. Action to Collect on Note. If action is instituted to collect on this Note, the Company promises to pay all costs and expenses,
including reasonable attorney’s fees, incurred in connection with such action. 
  
 11. Loss of Note. Upon receipt by the Company of evidence satisfactory to it of the loss, theft, destruction or mutilation of this Note or any Note exchanged for it, and indemnity satisfactory to the
Company (in case of loss, theft or destruction) or surrender and cancellation of such Note (in the case of mutilation), the Company will make and deliver in lieu of such Note a new Note of like tenor. 
  
 [Remainder of this page intentionally left blank.] 
  

 -3- 

 This Note was entered into as of the date set forth above. 
  

			
	COMPANY:
	
	DIGITAL LIGHTWAVE, INC.
		
	By:	 	 /s/ Robert F. Hussey

	 	 	Robert F. Hussey
	 	 	Interim President and Chief Executive Officer

  

			
	AGREED TO AND ACCEPTED:
	
	OPTEL CAPITAL, LLC
		
	By:	 	 /s/ Paul Ragaini

	Name:	 	 Paul Ragaini

	 	 	      (print)
	Title:	 	Chief Financial Officer

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