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| ARTICLE I   DEFINITIONS AND ACCOUNTING TERMS         |  1                                                                      |
|----------------------------------------------------------------|------------------------------------------------------------------------------|
| 1.01                                                           | Defined Term                                                                 |  1 |
| 1.02                                                           | Other Interpretive Provisions.                                               | 26 |
| 1.03                                                           | Accounting Terms                                                             | 27 |
| 1.04                                                           | Rounding                                                                     | 27 |
| 1.05                                                           | Exchange Rates; Currency Equivalents                                         | 27 |
| 1.06                                                           | Change of Currency                                                           | 27 |
| 1.07                                                           | Times of Day                                                                 | 28 |
| 1.08                                                           | Letter of Credit Amounts                                                     | 28 |
| ARTICLE II   THE COMMITMENTS AND CREDIT EXTENSIONS   | 29                                                                           |
| 2.01                                                           | Commitments                                                                  | 29 |
| 2.02                                                           | Borrowings, Conversions and Continuations of Loans                           | 29 |
| 2.03                                                           | Letters of Credit                                                            | 32 |
| 2.04                                                           | Swing Line Loans                                                             | 40 |
| 2.05                                                           | Prepayments.                                                                 | 42 |
| 2.06                                                           | Termination or Reduction of Aggregate Revolving Commitments                  | 45 |
| 2.07                                                           | Repayment of Loans                                                           | 45 |
| 2.08                                                           | Interest                                                                     | 46 |
| 2.09                                                           | Fees                                                                         | 47 |
| 2.10                                                           | Computation of Interest and Fees; Retroactive Adjustments of Applicable Rate | 47 |
| 2.11                                                           | Evidence of Debt.                                                            | 48 |
| 2.12                                                           | Payments Generally; Administrative Agent’s Clawback                    | 48 |
| 2.13                                                           | Sharing of Payments by Lenders                                               | 50 |
| ARTICLE III  TAXES, YIELD PROTECTION AND ILLEGALITY  | 51                                                                           |
| 3.01                                                           | Taxes                                                                        | 51 |
| 3.02                                                           | Illegality                                                                   | 54 |
| 3.03                                                           | Inability to Determine Rates                                                 | 54 |
| 3.04                                                           | Increased Costs                                                              | 54 |
| 3.05                                                           | Compensation for Losses                                                      | 56 |
| 3.06                                                           | Mitigation Obligations; Replacement of Lenders                               | 56 |
| 3.07                                                           | Survival                                                                     | 57 |
| ARTICLE IV  GUARANTY                                 | 57                                                                           |
| 4.01                                                           | The Guaranty                                                                 | 57 |
| 4.02                                                           | Obligations Unconditional                                                    | 57 |
| 4.03                                                           | Reinstatement                                                                | 58 |
| 4.04                                                           | Certain Additional Waivers                                                   | 59 |
| 4.05                                                           | Remedies                                                                     | 59 |
| 4.06                                                           | Rights of Contribution                                                       | 59 |
| 4.07                                                           | Guarantee of Payment; Continuing Guarantee                                   | 59 |
| ARTICLE V  CONDITIONS PRECEDENT TO CREDIT EXTENSIONS | 59                                                                           |
| 5.01                                                           | Conditions of Initial Credit Extension                                       | 59 |
| 5.02                                                           | Conditions to all Credit Extensions                                          | 62 |
| ARTICLE VI  REPRESENTATIONS AND WARRANTIES           | 62                                                                           |
| 6.01                                                           | Existence, Qualification and Power                                           | 62 |
| 6.02                                                           | Authorization; No Contravention                                              | 63 |
| 6.03                                                           | Governmental Authorization; Other Consents                                   | 63 |
| 6.04                                                           | Binding Effect.                                                              | 63 |

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| 6.05                                                 | Financial Statements; No Material Adverse Effect                                       | 63 |
|------------------------------------------------------|----------------------------------------------------------------------------------------|----|
| 6.06                                                 | Litigation                                                                             | 64 |
| 6.07                                                 | No Default                                                                             | 64 |
| 6.08                                                 | Ownership of Property; Liens                                                           | 64 |
| 6.09                                                 | Environmental Compliance                                                               | 64 |
| 6.10                                                 | Insurance                                                                              | 65 |
| 6.11                                                 | Taxes                                                                                  | 65 |
| 6.12                                                 | ERISA Compliance.                                                                      | 65 |
| 6.13                                                 | Subsidiaries                                                                           | 66 |
| 6.14                                                 | Margin Regulations; Investment Company Act                                             | 66 |
| 6.15                                                 | Disclosure                                                                             | 67 |
| 6.16                                                 | Compliance with Laws                                                                   | 67 |
| 6.17                                                 | Intellectual Property; Licenses, Etc                                                   | 67 |
| 6.18                                                 | Solvency                                                                               | 67 |
| 6.19                                                 | Labor Matters                                                                          | 67 |
| 6.20                                                 | Bonding Capacity.                                                                      | 67 |
| ARTICLE VII  AFFIRMATIVE COVENANTS         | 68                                                                                     |
| 7.01                                                 | Financial Statements                                                                   | 68 |
| 7.02                                                 | Certificates; Other Information                                                        | 68 |
| 7.03                                                 | Notices                                                                                | 70 |
| 7.04                                                 | Payment of Obligations                                                                 | 71 |
| 7.05                                                 | Preservation of Existence, Etc                                                         | 71 |
| 7.06                                                 | Maintenance of Properties                                                              | 72 |
| 7.07                                                 | Maintenance of Insurance                                                               | 72 |
| 7.08                                                 | Compliance with Laws                                                                   | 72 |
| 7.09                                                 | Books and Records                                                                      | 72 |
| 7.10                                                 | Inspection Rights.                                                                     | 72 |
| 7.11                                                 | Use of Proceeds                                                                        | 73 |
| 7.12                                                 | Additional Subsidiaries.                                                               | 73 |
| 7.13                                                 | ERISA Compliance                                                                       | 73 |
| 7.14                                                 | Interest Rate Protection Agreements.                                                   | 73 |
| 7.15                                                 | Pari Passu Ranking                                                                     | 74 |
| ARTICLE VIII  NEGATIVE COVENANTS           | 74                                                                                     |
| 8.01                                                 | Liens                                                                                  | 74 |
| 8.02                                                 | Investments.                                                                           | 76 |
| 8.03                                                 | Indebtedness                                                                           | 76 |
| 8.04                                                 | Fundamental Changes                                                                    | 77 |
| 8.05                                                 | Dispositions                                                                           | 77 |
| 8.06                                                 | Restricted Payments                                                                    | 77 |
| 8.07                                                 | Change in Nature of Business                                                           | 78 |
| 8.08                                                 | Transactions with Affiliates and Insiders                                              | 78 |
| 8.09                                                 | Burdensome Agreements                                                                  | 78 |
| 8.10                                                 | Use of Proceeds                                                                        | 79 |
| 8.11                                                 | Financial Covenants                                                                    | 79 |
| 8.12                                                 | Capital Expenditures.                                                                  | 79 |
| 8.13                                                 | Organization Documents; Fiscal Year; Legal Name, State of Formation and Form of Entity | 79 |
| 8.14                                                 | Preferred Equity                                                                       | 79 |
| 8.15                                                 | Sale Leasebacks                                                                        | 80 |
| ARTICLE IX  EVENTS OF DEFAULT AND REMEDIES | 80                                                                                     |
| 9.01                                                 | Events of Default                                                                      | 80 |
| 9.02                                                 | Remedies Upon Event of Default                                                         | 82 |

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| 9.03                                      | Application of Funds                                             | 82     |
|-------------------------------------------|------------------------------------------------------------------|--------|
| ARTICLE X  ADMINISTRATIVE AGENT | 83                                                               |
| 10.01                                     | Appointment and Authority                                        | 83     |
| 10.02                                     | Rights as a Lender                                               | 84     |
| 10.03                                     | Exculpatory Provisions                                           | 84     |
| 10.04                                     | Reliance by Administrative Agent                                 | 85     |
| 10.05                                     | Delegation of Duties                                             | 85     |
| 10.06                                     | Resignation of Administrative Agent                              | 85     |
| 10.07                                     | Non-Reliance on Administrative Agent and Other Lenders.          | 86     |
| 10.08                                     | No Other Duties; Etc.                                            | 86     |
| 10.09                                     | Administrative Agent May File Proofs of Claim                    | 86     |
| 10.10                                     | Guaranty Matters                                                 | 87     |
| ARTICLE XI  MISCELLANEOUS       | 87                                                               |
| 11.01                                     | Amendments, Etc                                                  | 87     |
| 11.02                                     | Notices and Other Communications; Facsimile Copies               | 89     |
| 11.03                                     | No Waiver; Cumulative Remedies; Enforcement                      | 91     |
| 11.04                                     | Expenses; Indemnity; and Damage Waiver                           | 91     |
| 11.05                                     | Payments Set Aside                                               | 93     |
| 11.06                                     | Successors and Assigns.                                          | 93     |
| 11.07                                     | Treatment of Certain Information; Confidentiality                | 97     |
| 11.08                                     | Set-off                                                          | 97     |
| 11.09                                     | Interest Rate Limitation                                         | 98     |
| 11.10                                     | Counterparts; Integration; Effectiveness                         | 98     |
| 11.11                                     | Survival of Representations and Warranties                       | 98     |
| 11.12                                     | Severability                                                     | 98     |
| 11.13                                     | Replacement of Lenders.                                          | 99     |
| 11.14                                     | Governing Law; Jurisdiction; Etc.                                | 100    |
| 11.15                                     | Waiver of Right to Trial by Jury                                 | 100    |
| 11.16                                     | Electronic Execution of Assignments and Certain Other Documents. | 101    |
| 11.17                                     | USA PATRIOT Act.                                                 | 101    |
| 11.18                                     | No Advisory or Fiduciary Relationship.                           | 101    |
| 11.19                                     | STATUTORY NOTICE – ORAL COMMITMENTS.                       | 102    |
| 11.20                                     | Time of the Essence.                                             | 102    |
|                                      |                                                             |   |

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| 1.01(a) | Existing Letters of Credit                |
|---------|-------------------------------------------|
| 1.01(b) | Mandatory Cost Formulae                   |
| 2.01    | Commitments and Applicable Percentages    |
| 6.13    | Subsidiaries                              |
| 6.19    | Labor Matters                             |
| 8.01    | Liens Existing on the Closing Date        |
| 8.02    | Investments Existing on the Closing Date  |
| 8.03    | Indebtedness Existing on the Closing Date |
| 8.08    | Transactions with Affiliates              |
| 11.02   | Certain Addresses for Notices             |

| A | Form of Loan Notice                             |
|---|-------------------------------------------------|
| B | Form of Swing Line Loan Notice                  |
| C | Form of Revolving Note                          |
| D |  Form of Swing Line Note                   |
| E | Form of Term Note                               |
| F | Form of Compliance Certificate                  |
| G | Form of Joinder Agreement                       |
| H | Form of Assignment and Assumption               |
| I | Form of Incremental Term Loan Funding Agreement |

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| Pricing Tier | ConsolidatedLeverage Ratio             | CommitmentFee | Letter of CreditFee | EurocurrencyLoans | Base RateLoans |
|--------------|----------------------------------------|---------------|---------------------|-------------------|----------------|
|         |                                   |          |                |              |           |
| 1            | ≤ 1.0 to 1.0                     | 0.375%        | 2.75%               | 2.75%             | 1.75%          |
| 2            | > 1.0 to 1.0 but ≤ 1.5 to 1.0 | 0.500%        | 3.00%               | 3.00%             | 2.00%          |
| 3            | > 1.5 to 1.0 but ≤ 2.0 to 1.0 | 0.500%        | 3.50%               | 3.50%             | 2.50%          |
| 4            | > 2.0 to 1.0                        | 0.625%        | 4.00%               | 4.00%             | 3.00%          |

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|                 | (ii)      The L/C Issuer shall not issue any Letter of Credit if:  |   |
|--------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------|--------|

|             | (iii) | The L/C Issuer shall not be under any obligation to issue any Letter of Credit if: |
|--------------------------------------------------------------------|-------|------------------------------------------------------------------------------------|

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|   | (b) | Procedures for Issuance and Amendment of Letters of Credit; Auto-Extension Letters of Credit. |
|--------|-----|-----------------------------------------------------------------------------------------------|

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| (i) | any lack of validity or enforceability of such Letter of Credit, this Agreement or any other Loan Document; |
|-----|-------------------------------------------------------------------------------------------------------------|

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|   | Within the parameters of the applications set forth above, prepayments shall be applied first to Base Rate Loans and then to Eurocurrency Rate Loans in direct order of Interest Period maturities.  All prepayments under this Section 2.05(b) shall be subject to Section 3.05, but otherwise without premium or penalty, and shall be accompanied by interest on the principal amount prepaid through the date of prepayment. |
|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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|  Payment Dates | Principal Amortization Payment (% of the Term Loan outstanding on the Closing Date plus the amount of Incremental Term Loans) |
|---------------------|-------------------------------------------------------------------------------------------------------------------------------|
|                |                                                                                                                          |
| June 30, 2009       | 5.00%                                                                                                                         |
| September 30, 2009  | 5.00%                                                                                                                         |
| December 31, 2009   | 5.00%                                                                                                                         |
| March 31, 2010      | 5.00%                                                                                                                         |
| June 30, 2010       | 5.00%                                                                                                                         |
| September 30, 2010  | 5.00%                                                                                                                         |
| December 31, 2010   | 5.00%                                                                                                                         |
| March 31, 2011      | 5.00%                                                                                                                         |
| June 30, 2011       | 5.00%                                                                                                                         |
| September 30, 2011  | 5.00%                                                                                                                         |
| December 31, 2011   | 5.00%                                                                                                                         |
| Maturity Date       | Outstanding Principal Balance of Term Loan                                                                                    |

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|   | (b)   No Default has occurred and is continuing. |
|--------|------------------------------------------------------------|

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|      Permit representatives and independent contractors of the Administrative Agent and each Lender to visit and inspect any of its properties, to examine its corporate, financial and operating records, and make copies thereof or abstracts therefrom, and to discuss its affairs, finances and accounts with its directors, officers, and independent public accountants, all at the expense of the Borrower and at such reasonable times during normal business hours and as often as may be reasonably desired, upon reasonable advance notice to the Borrower; |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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|   |   | (A)   in the case of an assignment of the entire remaining amount of the assigning Lender’s Commitment and the Loans at the time owing to it or in the case of an assignment to a Lender, an Affiliate of a Lender or an Approved Fund, no minimum amount need be assigned; and |
|--------|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   |   |  (B)   in any case not described in subsection (b)(i)(A) of this Section, the aggregate amount of the Commitment (which for this purpose includes Loans outstanding thereunder) or, if the Commitment is not then in effect, the principal outstanding balance of the Loans of the assigning Lender subject to each such assignment, determined as of the date the Assignment and Assumption with respect to such assignment is delivered to the Administrative Agent or, if “Trade Date” is specified in the Assignment and Assumption, as of the Trade Date, shall not be less than $5,000,000 in the case of an assignment of Revolving Loans and $1,000,000 in the case of an assignment of Term Loans unless each of the Administrative Agent and, so long as no Event of Default has occurred and is continuing, the Borrower otherwise consents (each such consent not to be unreasonably withheld or delayed); provided, however, that concurrent assignments to members of an Assignee Group and concurrent assignments from members of an Assignee Group to a single assignee (or to an assignee and members of its Assignee Group) will be treated as a single assignment for purposes of determining whether such minimum amount has been met; |
|--------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| BORROWER:   | INSITUFORM TECHNOLOGIES, INC.,                                                     |
|-------------|------------------------------------------------------------------------------------|
|        | a Delaware corporation                                                             |
|        |                                                                               |
|        |                                                                               |
|        | By:      /s/ David F. Morris                         |
|        | Name:   David F. Morris                                                  |
|        | Title:     Senir Vice President, General Counsel               |
|        |       & Chief Administrative Officer             |
|        |                                                                               |
| GUARANTORS: | INSITUFORM TECHNOLOGIES USA, INC.,                                                 |
|        | a Delaware corporation                                                             |
|        |                                                                               |
|        |                                                                               |
|        | By:  /s/ David F. Morris                                  |
|        | Name:  David F. Morris                                                        |
|        | Title:    Senior Vice President & Chief Administrative Officer  |
|        |                                                                               |
|        | INA ACQUISITION CORP.,                                                             |
|        | a Delaware corporation                                                             |
|        |                                                                               |
|        |                                                                               |
|        | By:     /s/ David F. Morris           |
|        | Name:  David F. Morris                                                        |
|        | Title:    Senior Vice President & Chief Administrative Officer  |
|        |                                                                               |
|        | ITI INTERNATIONAL SERVICES, INC.,                                                  |
|        | a Delaware corporation                                                             |
|        |                                                                               |
|        |                                                                               |
|        | By:      /s/ David F. Morris     |
|        | Name:  David F. Morris                                                        |
|        | Title:    Senior Vice President & Chief Administrative Officer  |
|        |                                                                               |
|        | MISSISSIPPI TEXTILES CORPORATION,                                                  |
|        | a Mississippi corporation                                                          |
|        |                                                                               |
|        |                                                                               |
|        | By:     /s/ David F. Morris      |
|        | Name:  David F. Morris                                                        |
|        | Title:    Senior Vice President & Chief Administrative Officer  |
|        |                                                                               |
|        | AFFHOLDER, INC.,                                                                   |
|        | a Missouri corporation                                                             |
|        |                                                                               |
|        |                                                                               |
|        | By:    /s/ David F. Morris       |
|        | Name:  David F. Morris                                                        |
|        | Title:    Senior Vice President & Chief Administrative Officer  |

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|     |                                                                                     |
|---------------|------------------------------------------------------------------------------------------|
|          | THE BAYOU COMPANIES, INC.,                                                               |
|          | a Delaware corporation                                                                   |
|          |                                                                                     |
|          |                                                                                     |
|          | By:      /s/ David F. Morris           |
|          | Name:  David F. Morris                                                              |
|          | Title:    SVP & CAO                                                   |
|          |                                                                                     |
|          | KINSEL INDUSTRIES, INC.,                                                                 |
|          | a Texas corporation                                                                      |
|          |                                                                                     |
|          |                                                                                     |
|          | By:     /s/ David F. Morris       |
|          | Name:  David F. Morris                                                              |
|          | Title:    SVP & CAO                                                   |
|          |                                                                                     |
|          | CCSI MANAGEMENT, LLC,                                                                    |
|          | a Texas limited liability company                                                        |
|          |                                                                                     |
|          |                                                                                     |
|          | By:     /s/ David F. Morris            |
|          | Name:  David F. Morris                                                              |
|          | Title:    SVP & CAO                                                   |
|          |                                                                                     |
|          | COMMERCIAL COATING SERVICES INTERNATIONAL, LTD.,                                         |
|          | a Texas limited partnership                                                              |
|          |                                                                                     |
|          |                                                                                     |
|          | By:     /s/ David F. Morris       |
|          | Name:  David F. Morris                                                              |
|          | Title:    SVP & CAO                                                   |
|          |                                                                                     |
|          | BAYOU WELDING WORKS, LLC,                                                                |
|          | a Louisiana limited liability company                                                    |
|          |                                                                                     |
|          |                                                                                     |
|          | By:      /s/ David F. Morris      |
|          | Name:  David F. Morris                                                              |
|          | Title:    SVP & CAO                                                   |
|          |                                                                                     |

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|                  |                                                                                                                                                                                                      |
|-----------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ADMINISTRATIVE AGENT: | BANK OF AMERICA, N.A.,                                                                                                                                                                                    |
|                  | as Administrative Agent                                                                                                                                                                                   |
|                  |                                                                                                                                                                                                      |
|                  | By:     /s/ Michael Brashler                                                                                                                            |
|                  | Name:  Michael Brashler                                                                                                                                                                              |
|                  | Title:    Vice President                                                                                                                                                                   |
|                  |                                                                                                                                                                                                      |
| LENDERS:              | BANK OF AMERICA, N.A.,                                                                                                                                                                                    |
|                  | as a Lender, Swing Line Lender and L/C Issuer                                                                                                                                                             |
|                  |                                                                                                                                                                                                      |
|                  | By:    /s/ Stephen Bode                                                                                                                                                               |
|                  | Name:  Stephen Bode                                                                                                                                                                                  |
|                  | Title:    Senior Vice President                                                                                                                                                            |
|                  |                                                                                                                                                                                                      |
|                  | FIFTH THIRD BANK, A MICHIGAN BANKING CORPORATION                                                                                                                                                          |
|                  | as a Lender                                                                                                                                                                                               |
|                  |                                                                                                                                                                                                      |
|                  | By:    /s/ Traci L. Dodson                                                                                                                                                            |
|                  | Name:    Traci L. Dodson                                                                                                                                                                   |
|                  | Title:      Vice President                          |

|   | U.S. BANK, NATIONAL ASSOCIATION                                                              |
|--------|----------------------------------------------------------------------------------------------|
|   | as a Lender                                                                                  |
|   |                                                                                         |
|   | By:    /s/ Heather N. Hinkelman                                          |
|   | Name:  Heather N. Hinkelman                                                             |
|   | Title:    Vice President                                                      |
|   |                                                                                         |
|   | COMPASS BANK,                                                                                |
|   | as a Lender                                                                                  |
|   |                                                                                         |
|   | By:    /s/ Key Coker                                                     |
|   | Name:    Key CokerTitle:      Managing Director |

----

|   |                     |
|--------|--------------------------------------------------------------------------------------------------------------------|

| LENDERS: | JPMORGAN CHASE BANK, N.A.,                                                                                                                                                                                |
|----------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|     | as a Lender                                                                                                                                                                                               |
|     |                                                                                                                                                                                                      |
|     | By:    /s/ Donna B. Kirtian                                                                                                                                                           |
|     | Name:  Donna B. Kirtian                                                                                                                                                                              |
|     | Title:    Vice President                                                                                                                                                                   |
|     |                                                                                                                                                                                                      |
|     | ASSOCIATED BANK, N.A.,                                                                                                                                                                                    |
|     | as a Lender                                                                                                                                                                                               |
|     |                                                                                                                                                                                                      |
|     | By:    /s/ Mark Weitekamp                                                                                                                                                             |
|     | Name:    Mark Weitekamp                                                                                                                                                                    |
|     | Title:      Vice President                          |

|   |                     |
|--------|--------------------------------------------------------------------------------------------------------------------|

|   | CAPITAL ONE, N.A.,                             |
|--------|------------------------------------------------|
|   | as a Lender                                    |
|   |                                           |
|   | By:    /s/ Anne Marie Zima |
|   | Name:  Anne Marie Zima                    |
|   | Title:    Vice President        |
|   |

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|  Issuer          | Applicant                     | Beneficiary                   | Letter of Credit Number | Amount      | Expiration |
|-----------------------|-------------------------------|-------------------------------|-------------------------|-------------|------------|
| Bank of America, N.A. | Corrpro Companies, Inc.       | NATIONAL UNION FIRE INSURANCE | 3082739                 | $25,000.00  | 06/26/09   |
| Bank of America, N.A. | Corrpro Companies, Inc.       | TECHNIP-ZACHRY-SAIPEM LNG LP  | 3094365                 | $63,808.70  | 07/01/09   |
| Bank of America, N.A. | Corrpro Companies, Inc.       | LIBERTY MUTUAL INSURANCE CO.  | 3086246                 | $83,152.00  | 01/15/10   |
| Bank of America, N.A. | Corrpro Companies, Inc.       | LIBERTY MUTUAL INSURANCE CO.  | 3086244                 | $356,000.00 | 01/15/10   |
| Bank of America, N.A. | Corrpro Companies, Inc.       | ROYAL BANK OF CANADA          | 3086245                 | $300,000.00 | 01/15/10   |
| Bank of America, N.A. | Corrpro Companies, Inc.       | LIBERTY MUTUAL INSURANCE CO.  | 3086913                 | $168,682.00 | 02/20/10   |
| Bank of America, N.A. | Corrpro Companies, Inc.       | ACSTAR INSURANCE COMPANY      | 3092905                 | $400,000.00 | 04/11/09   |
| Bank of America, N.A. | Corrpro Companies, Inc.       | ACSTAR INSURANCE COMPANY      | 3092567                 | $400,000.00 | 04/22/09   |
| Bank of America, N.A. | Corrpro Companies, Inc.       | ACSTAR INSURANCE COMPANY      | 3092568                 | $374,572.00 | 04/22/09   |
| Bank of America, N.A. | Corrpro Companies, Inc.       | ACSTAR INSURANCE COMPANY      | 3093050                 | $278,858.00 | 04/22/09   |
| Bank of America, N.A. | Corrpro Companies, Inc.       | ACSTAR INSURANCE COMPANY      | 3092065                 | $199,900.00 | 02/16/10   |
| Bank of America, N.A. | Corrpro Companies, Inc.       | ACSTAR INSURANCE COMPANY      | 3092064                 | $306,000.00 | 02/16/10   |
| Bank of America, N.A. | Insituform Technologies, Inc. | CITY OF CHICAGO               | 705264                  | $25,000.00  | 12/31/12   |

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|  Issuer          | Applicant                     | Beneficiary                  | Letter of Credit Number | Amount                                                | Expiration |
|-----------------------|-------------------------------|------------------------------|-------------------------|-------------------------------------------------------|------------|
| Bank of America, N.A. | Insituform Technologies, Inc. | LIBERTY MUTUAL INSURANCE CO. | 3039594                 | $14,530,000                                           | 7/1/09     |
| Bank of America, N.A. | Insituform Technologies, Inc. | CANARA BANK                  | 3091713                 | $17,250,000.00 Rupees ($339,266.45 USD as of 3/01/09) | 9/28/10    |
| Bank of America, N.A. | Insituform Technologies, Inc. | CANARA BANK                  | 3091784                 | $17,164,366.00 Rupees ($337,582.23 USD as of 3/01/09) | 9/28/10    |

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| 1.   | The Mandatory Cost (to the extent applicable) is an addition to the interest rate to compensate Lenders for the cost of compliance with: |
|----------------|------------------------------------------------------------------------------------------------------------------------------------------|

|     (a)   | the requirements of the Bank of England and/or the Financial Services Authority (or, in either case, any other authority which replaces all or any of its functions); or |
|------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|     (b)   | the requirements of the European Central Bank. |
|------------------------------------|------------------------------------------------|

| 2.   | On the first day of each Interest Period (or as soon as practicable thereafter) the Administrative Agent shall calculate, as a percentage rate, a rate (the “Additional Cost Rate”) for each Lender, in accordance with the paragraphs set out below.  The Mandatory Cost will be calculated by the Administrative Agent as a weighted average of the Lenders’ Additional Cost Rates (weighted in proportion to the percentage participation of each Lender in the relevant Loan) and will be expressed as a percentage rate per annum.  The Administrative Agent will, at the request of the Borrower or any Lender, deliver to the Borrower or such Lender as the case may be, a statement setting forth the calculation of any Mandatory Cost. |
|----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 3.   | The Additional Cost Rate for any Lender lending from a Lending Office in a Participating Member State will be the percentage notified by that Lender to the Administrative Agent.  This percentage will be certified by such Lender in its notice to the Administrative Agent as the cost (expressed as a percentage of such Lender’s participation in all Loans made from such Lending Office) of complying with the minimum reserve requirements of the European Central Bank in respect of Loans made from that Lending Office. |
|----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 4.   | The Additional Cost Rate for any Lender lending from a Lending Office in the United Kingdom will be calculated by the Administrative Agent as follows: |
|----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------|

|      (a)   | in relation to any Loan in Sterling: |
|------------------------------------------|--------------------------------------|

|             AB+C(B-D)+E x 0.01 | per cent per annum |
|--------------------------------------------------------------------------------------------|--------------------|
|              100 - (A+C)  |

|      (b)   | in relation to any Loan in any currency other than Sterling: |
|------------------------------------------|--------------------------------------------------------------|

|             E x 0.01  | per cent per annum |
|-----------------------------------------------------------------------------------|--------------------|
|              300 |

|   | “A” | is the percentage of Eligible Liabilities (assuming these to be in excess of any stated minimum) which that Lender is from time to time required to maintain as an interest free cash ratio deposit with the Bank of England to comply with cash ratio requirements. |
|--------|-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | “B” | is the percentage rate of interest (excluding the Applicable Rate, the Mandatory Cost and any interest charged on overdue amounts pursuant to the first sentence of Section 2.08(b) and, in the case of interest (other than on overdue amounts) charged at the Default Rate, without counting any increase in interest rate effected by the charging of the Default Rate) payable for the relevant Interest Period of such Loan. |
|--------|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | “C” | is the percentage (if any) of Eligible Liabilities which that Lender is required from time to time to maintain as interest bearing Special Deposits with the Bank of England. |
|--------|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | “D” | is the percentage rate per annum payable by the Bank of England to the Administrative Agent on interest bearing Special Deposits. |
|--------|-----------------|-----------------------------------------------------------------------------------------------------------------------------------|

|   | “E” | is designed to compensate Lenders for amounts payable under the Fees Regulations and is calculated by the Administrative Agent as being the average of the most recent rates of charge supplied by the Lenders to the Administrative Agent pursuant to paragraph 7 below and expressed in pounds per £1,000,000. |
|--------|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 5.   | For the purposes of this Schedule: |
|----------------|------------------------------------|

|     (a)   | “Eligible Liabilities” and “Special Deposits” have the meanings given to them from time to time under or pursuant to the Bank of England Act 1998 or (as may be appropriate) by the Bank of England; |
|------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|     (b)   | “Fees Regulations” means the FSA Supervision Manual or such other law or regulation as may be in force from time to time in respect of the payment of fees for the acceptance of deposits; |
|------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|     (c)   | “Fee Tariffs” means the fee tariffs specified in the Fees Regulations under the activity group A.1 Deposit acceptors (ignoring any minimum fee or zero rated fee required pursuant to the Fees Regulations but taking into account any applicable discount rate); and |
|------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|     (d)   | “Tariff Base” has the meaning given to it in, and will be calculated in accordance with, the Fees Regulations. |
|------------------------------------|----------------------------------------------------------------------------------------------------------------------------|

| 6.   | In application of the above formulae, A, B, C and D will be included in the formulae as percentages (i.e. 5% will be included in the formula as 5 and not as 0.05).  A negative result obtained by subtracting D from B shall be taken as zero.  The resulting figures shall be rounded to four decimal places. |
|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 7.   | If requested by the Administrative Agent or the Borrower, each Lender with a Lending Office in the United Kingdom or a Participating Member State shall, as soon as practicable after publication by the Financial Services Authority, supply to the Administrative Agent and the Borrower, the rate of charge payable by such Lender to the Financial Services Authority pursuant to the Fees Regulations in respect of the relevant financial year of the Financial Services Authority (calculated for this purpose by such Lender as being the average of the Fee Tariffs applicable to such Lender for that financial year) and expressed in pounds per £1,000,000 of the Tariff Base of such Lender. |
|----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 8.   | Each Lender shall supply any information required by the Administrative Agent for the purpose of calculating its Additional Cost Rate.  In particular, but without limitation, each Lender shall supply the following information in writing on or prior to the date on which it becomes a Lender: |
|----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|     (a)   | its jurisdiction of incorporation and the jurisdiction of the Lending Office out of which it is making available its participation in the relevant Loan; and |
|------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------|

|     (b)   | any other information that the Administrative Agent may reasonably require for such purpose. |
|------------------------------------|----------------------------------------------------------------------------------------------|

----

| 9.   | The percentages or rates of charge of each Lender for the purpose of A, C and E above shall be determined by the Administrative Agent based upon the information supplied to it pursuant to paragraphs 7 and 8 above and on the assumption that, unless a Lender notifies the Administrative Agent to the contrary, each Lender’s obligations in relation to cash ratio deposits, Special Deposits and the Fees Regulations are the same as those of a typical bank from its jurisdiction of incorporation with a Lending Office in the same jurisdiction as such Lender’s Lending Office. |
|----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.   | The Administrative Agent shall have no liability to any Person if such determination results in an Additional Cost Rate which over- or under-compensates any Lender and shall be entitled to assume that the information provided by any Lender pursuant to paragraphs 3, 7 and 8 above is true and correct in all respects. |
|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 11.   | The Administrative Agent shall distribute the additional amounts received as a result of the Mandatory Cost to the Lenders on the basis of the Additional Cost Rate for each Lender based on the information provided by each Lender pursuant to paragraphs 3, 7 and 8 above. |
|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 12.   | Any determination by the Administrative Agent pursuant to this Schedule in relation to a formula, the Mandatory Cost, an Additional Cost Rate or any amount payable to a Lender shall, in the absence of manifest error, be conclusive and binding on all parties hereto. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 13.   | The Administrative Agent may from time to time, after consultation with the Borrower and the Lenders, determine and notify to all parties any amendments which are required to be made to this Schedule in order to comply with any change in law, regulation or any requirements from time to time imposed by the Bank of England, the Financial Services Authority or the European Central Bank (or, in any case, any other authority which replaces all or any of its functions) and any such determination shall, in the absence of manifest error, be conclusive and binding on all parties hereto. |
|-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|    Lender              | Revolving Commitment | Applicable Percentage of Revolving Commitment | Term Loan Commitment | Applicable Percentage of Term Loan Commitment |
|---------------------------------------|----------------------|-----------------------------------------------|----------------------|-----------------------------------------------|
| Bank of America, N.A.            | $14,130,434.78       | 21.739130436%                                 | $10,869,565.22       | 21.739130436%                                 |
| Fifth Third Bank                 | $11,304,347.83       | 17.391304348%                                 | $8,695,652.17        | 17.391304348%                                 |
| U.S. Bank, National Association  | $11,304,347.83       | 17.391304348%                                 | $8,695,652.17        | 17.391304348%                                 |
| Compass Bank                     | $9,891,304.35        | 15.217391304%                                 | $7,608,695.65        | 15.217391304%                                 |
| JPMorgan Chase Bank, N.A.        | $9,891.304.35        | 15.217391304%                                 | $7,608,695.65        | 15.217391304%                                 |
| Associated Bank, N.A.            | $4,239,130.43        | 6.521739130%                                  | $3,260,869.57        | 6.521739130%                                  |
| Capital One, N.A.                | $4,239,130.43        | 6.521739130%                                  | $3,260,869.57        | 6.521739130%                                  |
| TOTAL                                 | $65,000,000.00       | 100.000000000%                                | $50,000,000.00       | 100.000000000%                                |

----

| Company Name                                                  | Place of Formation    | Ownership(7)                                                                                                                                        |
|---------------------------------------------------------------|-----------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------|
| Affholder, Inc. (1)                                           | Missouri              | Insituform Technologies, Inc. owns 100% of shares                                                                                                   |
| Clearline Services Limited (1)                                | United Kingdom        | Insituform Holdings (UK) Limited owns 100% of shares                                                                                                |
| INA Acquisition Corp.                                         | Delaware              | Insituform Technologies, Inc. owns 100% of shares                                                                                                   |
| Insituform Balcani S.R.L.                                     | Romania               | Insituform Holdings (UK) Limited owns 99.9961%; Insituform Technologies USA, Inc. owns 0.0039%                                                      |
| Insituform Belgium N.V.                                       | Belgium               | Insituform Holdings (UK) Limited owns 50,999 shares; Insituform Rioolrenovatietechnieken B.V. owns 1 share                                          |
| Insituform CV                                                 | The Netherlands       | Insituform Technologies, Inc. owns 0.62% Limited Partnership interest; Insituform Technologies CV 99.38% General Partnership interest               |
| Insituform Cyprus Limited                                     | Cyprus                | Insituform Technologies Ltd. [Canada] owns 100% of shares                                                                                           |
| Insituform Europe SAS                                         | France                | Insituform Cyprus Limited owns 100% of shares                                                                                                       |
| Insituform Holdings (UK) Limited                              | United Kingdom        | Insituform Holdings B.V. owns 100% of shares                                                                                                        |
| Insituform Holdings BV                                        | The Netherlands       | Insituform Technologies Netherlands B.V. owns 18,000 Common shares; Insituform Cyprus Limited owns 1 Preferred share                                |
| Insituform Hong Kong Limited                                  | Hong Kong, China      | Insituform Technologies Netherlands B.V. owns 100% of shares                                                                                        |
| Insituform Limited Partnership                                | New Brunswick, Canada | Insituform Technologies Netherlands B.V. owns 99.99% General Partnership interest; Insituform Holdings B.V. owns 0.01% Limited Partnership interest |
| Insituform Linings Public Limited Company                     | United Kingdom        | Insituform Holdings (UK) Limited owns 75% of shares (2)                                                                                             |
| Insituform Pipeline Rehabilitation Private Limited            | India                 | Insituform Technologies Netherlands BV owns 50.5% of shares (3)                                                                                     |
| Insituform Rioolrenovatietechnieken B.V.                      | The Netherlands       | Insituform Cyprus Limited owns 100% of shares                                                                                                       |
| Insituform Singapore Pte. Ltd.                                | Singapore             | Insituform Technologies Netherlands B.V. owns 100% of shares                                                                                        |
| Insituform sp. z o.o.                                         | Poland                | Insituform Holdings (UK) Limited owns 100% of shares                                                                                                |
| Insituform Technologies CV                                    | The Netherlands       | Insituform Technologies, Inc. owns 0.5% Limited Partnership interest; INA Acquisition Corp. owns 99.5% General Partnership interest                 |
| Insituform Technologies Iberica S.A.                          | Spain                 | INA Acquisition Corp. owns 100% of shares                                                                                                           |
| Insituform Technologies Limited                               | Alberta, Canada       | Insituform CV owns 300 Common shares & 1,127,801 Class A Preferred shares; INA Acquisition Corp. owns 500 Special shares                        |
| Insituform Technologies Limited                               | United Kingdom        | Insituform Holdings (UK) Limited owns 100% of shares                                                                                                |
| Insituform Technologies Netherlands BV                        | The Netherlands       | Insituform CV owns 100% of shares                                                                                                                   |
| Insituform Technologies USA, Inc.                             | Delaware              | Insituform Technologies, Inc. owns 100% of shares                                                                                                   |
| ITI International Services, Inc.                              | Delaware              | Insituform Technologies, Inc. owns 100% of shares                                                                                                   |
| KA-TE Insituform AG                                           | Switzerland           | Insituform Holdings B.V. owns 100% of shares                                                                                                        |
| Kinsel Industries, Inc.                                       | Texas                 | Insituform Technologies, Inc. owns 100% of shares                                                                                                   |
| Mississippi Textiles Corporation                              | Mississippi           | Insituform Technologies, Inc. owns 100% of shares                                                                                                   |
| Nu Pipe Limited (1)                                           | United Kingdom        | Insituform Holdings (UK) Limited owns 100% of shares                                                                                                |
| Sewer Services Limited (1)                                    | United Kingdom        | Insituform Holdings (UK) Limited owns 100% of shares                                                                                                |
| United Pipeline de Mexico S.A. de C.V.                        | Mexico                | INA Acquisition Corp. owns 55% of shares (4)                                                                                                        |
| United Sistema de Tuberias Limitada                           | Chile                 | Insituform Technologies, Inc. owns 60% of shares; INA Acquisition Corp. owns 40% of shares                                                          |
| Insituform Hulin s.r.o.                                       | Hungary               | Insituform-Hulin Rohrsanierungstech­niken S.R.O. owns 100% of shares                                                                           |
| Insituform Leitungssanierung GmbH                             | Austria               | Insituform Rohrsanierungstechniken GmbH owns 100% of shares                                                                                         |
| Insituform s.r.o.                                             | Czech Republic        | Insituform-Hulin Rohrsanierungstech­niken S.R.O. owns 100% of shares                                                                           |
| Insituform-Hulin Rohrsanierungstechniken S.R.O.               | Slovakia              | Insituform Rohrsanierungstechniken GmbH owns 51% of shares                                                                                          |
| United Sistemas de Revestimento em Tubulações Ltda. | Brazil                | Insituform Holdings B.V. owns 1% shares; Insituform Technologies Netherlands B.V. owns 99% shares                                                   |
| Video Injection – Insituform SAS                        | France                | Insituform Cyprus Limited owns 100% of shares                                                                                                       |
| Bayou Welding Works, L.L.C.                                   | Louisiana             | The Bayou Companies, Inc. owns 100% of shares                                                                                                       |
| CCSI Management, L.L.C.                                       | Texas                 | The Bayou Companies, Inc. owns 100% of shares                                                                                                       |
| Commercial Coating Services International, Ltd.               | Texas                 | The Bayou Companies, Inc. owns 99% Limited Partnership interest; CCSI Management, LLC 1% General Partnership interest                               |
| The Bayou Companies, Inc.                                     | Delaware              | Insituform Technologies, Inc. owns 100% of shares                                                                                                   |
| Basco Actel, Inc. (1)                                         | Texas                 | Wilson Walton Group Ltd. owns 100% of shares                                                                                                        |
| Borza Inspections Ltd.                                        | Alberta, Canada       | Corrpro Canada, Inc. owns 100% of shares                                                                                                            |
| CCFC, Inc.(6)                                                 | Nevada                | Corrpro Companies, Inc. owns 100% of shares                                                                                                         |
| Corrpro Canada, Inc.                                          | Alberta, Canada       | Corrpro International, Inc. owns 100% of shares                                                                                                     |
| Corrpro Companies C.A.                                        | Venezuela             | Corrpro International, Inc. owns 99.99% of shares (5)                                                                                               |
| Corrpro Companies Engineering Limited (1)                     | United Kingdom        | Corrpro Companies, Inc. owns 100% of shares                                                                                                         |
| Corrpro Companies Europe Ltd.                                 | United Kingdom        | Wilson Walton Group Ltd. owns 100% of shares                                                                                                        |
| Corrpro Companies, Inc.(6)                                    | Ohio                  | Insituform Technologies, Inc. owns 100% of shares                                                                                                   |
| Corrpro International, Inc.(6)                                | Delaware              | Corrpro Companies, Inc. owns 100% of shares                                                                                                         |
| Harcotec de Mexico (1)                                        | Mexico                | Corrpro Companies, Inc. owns 100% of shares                                                                                                         |
| Ocean City Research Corporation(6)                            | New Jersey            | Corrpro Companies, Inc. owns 100% of shares                                                                                                         |
| Wilson Walton Anti Corrosivos Ltd.                            | Portugal              | Wilson Walton Group Ltd. owns 100% of shares                                                                                                        |
| Wilson Walton Group Ltd.                                      | United Kingdom        | Corrpro Companies, Inc. owns 100% of shares                                                                                                         |
| Wilson Walton Overseas Holding Limited (1)                    | United Kingdom        | Wilson Walton Group Ltd. owns 100% of shares                                                                                                        |

| (1) | Entity in dissolution / liquidation or to be dissolved. |
|-----|---------------------------------------------------------|

| (2) | Remaining 25% owned by Per Aarsleff A/S. |
|-----|------------------------------------------|

| (3) | Remaining 49.5% owned by Subhash Projects and Marketing Limited. |
|-----|------------------------------------------------------------------|

| (4) | Remaining 45% owned by Miller Pipeline of Mexico S.A. de C.V. |
|-----|---------------------------------------------------------------|

| (5) | Remaining 0.01% owned by Luis Miguel Vicentini, the company’s Venezuelan legal counsel. |
|-----|-----------------------------------------------------------------------------------------------|

| (6) | These entities will be joined to the Credit Agreement as Guarantors upon Closing. |
|-----|-----------------------------------------------------------------------------------|

| (7) | There are no outstanding options, warrants, or rights of conversions or purchase with respect to the equity interests of the above. |
|-----|-------------------------------------------------------------------------------------------------------------------------------------|

----

| Local                                            | Type                 | State                | Current Contract Dates | Contract (2) Expires |
|--------------------------------------------------|----------------------|----------------------|------------------------|---------------------------|
| 42, 53, 110                                      | Laborers             | MO                   | 3/1/2004 - 3/1/2009    | 3/1/2009                  |
| MO                                               | 3/1/2004 - 3/1/2009  | 3/1/2009             |
| 660                                              | Laborers             | MO                   | 5/1/2004 - 5/1/2009    | 4/30/2010                 |
| 513                                              | Operators            | MO                   | 5/1/2004 - 4/30/2009   | 4/30/2009                 |
| 663                                              | Laborers             | MO                   | 5/1/2006 - 4/30/2010   | 4/30/2010                 |
| 101                                              | Operators            | MO                   |                   |                      |
| 1290 , 142, 579                                  | Laborers             | KS                   | 7/1/2003 - 7/1/2008    | 7/1/2008                  |
| 353                                              | Laborers             | IA/NE/SD             | 12/1/2003 - 11/30/2007 | 11/30/2007                |
| 464                                              | Laborers             | WI                   | 6/5/06 - 5/31/11       | 5/31/2011                 |
| 132                                              | Laborers             | MN, ND               | 5/1/2006 - 4/30/2008   | 4/30/2008                 |
| 49                                               | Operators            | MN                   | 2005 - 4/30/2008       | 4/30/2008                 |
| 120                                              | Laborers             | IN                   | 4/1/2004 - 3/31/2009   | 3/31/2009                 |
| 274                                              | Laborers             | IN                   | 4/1/2004 - 3/31/2009   | 3/31/2009                 |
| 103                                              | Operators            | IN                   | 4/1/2004 - 3/31/2009   | 3/31/2009                 |
| 841                                              | Operators            | IN                   | 1/1/2003 - 12/31/2007  | 12/31/2007                |
| 120                                              | Wetout Laborers      | IN                   | 5/1/2008 - 4/30/2010   | 4/30/2010                 |
| 324                                              | Operators            | MI                   | 10/1/2007 - 9/30/2010  | 9/30/2010                 |
| 701                                              | Auto Mechanics       | IL                   | 6/1/2003 - 5/31/2009   | 5/31/09                   |
| 673                                              | Teamster             | IL                   | 6/1/2004 - 5/31/09     | 5/31/2009                 |
| 288                                              | Laborers             | IL                   | 6/1/06 - 5/31/2010     | 5/31/2010                 |
| 2                                                | Laborers             | IL                   | 6/1/06 - 5/31/2010     | 5/31/2010                 |
| 159, 171, 253, 477, 624, 703                     | Laborers             | IL                   | 5/1/2003 - 4/30/2008   | 4/30/2008                 |
| Laborers                                         | IL                   | 5/1/2003 - 4/30/2008 | 4/30/2008              |
| 44, 100, 196, 218, 338, 397, 459, 581, 622, 1084 | Laborers             | IL                   | 8/1/2006 - 7/31/2010   | 7/31/2010                 |
| Laborers                                         | IL                   | 8/1/2006 - 7/31/2010 | 7/31/2010              |
| Laborers                                         | IL                   | 8/1/2006 - 7/31/2010 | 7/31/2010              |
| Laborers                                         | IL                   | 8/1/2006 - 7/31/2010 | 7/31/2010              |
| 309                                              | Laborers             | IL                   | 1/1/2003 - 12/31/2007  | 12/31/2007                |
| 165                                              | Laborers             | IL                   | 9/1/2007               |                      |
| 649                                              | Operators            | IL                   | 4/1/2005 - 3/31/2009   | 3/31/2009                 |
| 6296-01(1)                                       | United Steelworkers  | LA                   | 7/1/2006 - 6/30/09     | 6/30/2009                 |
| 362 and 996                                      | Laborers             | IL                   | 9/1/2007               |                      |
| 773 and 1197                                     | Laborers             | IL                   | 4/1/2003 - 3/31/2008   | 3/31/2008                 |
| IL                                               | 4/1/2003 - 3/31/2008 | 3/31/2008            |
| 150                                              | Operators            | IL                   | 6/1/2007 - 5/31/2010   | 5/31/2010                 |
| 520                                              | Operators            | IL                   | 8/1/2007 - 7/31/2012   | 7/31/2012                 |
| 965                                              | Operators            | IL                   | 5/1/2008 - 4/30/2013   | 4/30/2013                 |

| (1) |   Bayou Coating, LLC is party to this Collective Bargaining Agreement.  Insituform Technologies USA, Inc. is party to all other Collective Bargaining Agreements. |
|-----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (2) |  For those Collective Bargaining Agreements which have expired, Insituform Technologies USA, Inc. does not currently work in that region (and has not been required to re-sign a Collective Bargaining Agreement) or a new Collective Bargaining Agreement is being negotiated and the Company and Local Union are working under the parameters of the expired agreement until such time as the new agreement goes into effect. |
|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| Debtor                                             | File Number        | Secured Party                                                                                      | Collateral Description(1)                                           |
|----------------------------------------------------|--------------------|----------------------------------------------------------------------------------------------------|---------------------------------------------------------------------|
| Insituform Technologies, Inc. (Delaware)      | 0040297            | Banc of America Leasing & Capital, LLC                                                         | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 0051019            | Banc of America Leasing & Capital, LLC                                                         | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 10417605           | Banc of America Leasing & Capital, LLC                                                         | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 40917791           | Siemens Financial Services, Inc.                                                                   | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 40899783           | CitiCapital Commercial Leasing Corporation                                                         | Two pieces of specific I.H.I. Excavator equipment by S/N            |
| Insituform Technologies, Inc. (Delaware)      | 40900599           | CitiCapital Commercial Leasing Corporation                                                         | Two pieces of specific I.H.I. Excavator equipment by S/N            |
| Insituform Technologies, Inc. (Delaware)      | 41074956           | Deere Credit Inc.                                                                                  | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 41271321           | Banc of America Leasing & Capital, LLC, Successor by Merger to NationsBanc Leasing Corporation | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 41308271           | Banc of America Leasing & Capital, LLC, Successor by Merger to NationsBanc Leasing Corporation | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 41339268           | Banc of America Leasing & Capital, LLC, Successor by Merger to NationsBanc Leasing Corporation | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 41362435           | Banc of America Leasing & Capital, LLC, Successor by Merger to NationsBanc Leasing Corporation | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 41363938           | Banc of America Leasing & Capital, LLC, Successor by Merger to NationsBanc Leasing Corporation | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 41912270           | CitiCapital Commercial Leasing Corporation                                                         | Three pieces of specific I.H.I. equipment by S/N                    |
| Insituform Technologies, Inc. (Delaware)      | 42059675           | CitiCapital Commercial Corporation                                                                 | Four pieces of specific I.H.I. equipment by S/N                     |
| Insituform Technologies, Inc. (Delaware)      | 42573493           | Deere Credit Inc.                                                                                  | Five specific John Deere Backhoe Loaders by S/Ns                    |
| Insituform Technologies, Inc. (Delaware)      | 42740290           | Computer Sales International, Inc.                                                                 | Certain leased Cisco equipment                                      |
| Insituform Technologies, Inc. (Delaware)      | 43183300           | IBM Credit LLC                                                                                     | Certain leased IBM equipment                                        |
| Insituform Technologies, Inc. (Delaware)      | 51515387           | IBM Credit LLC                                                                                     | Certain leased IBM equipment                                        |
| Insituform Technologies, Inc. (Delaware)      | 51665059           | Banc of America Leasing & Capital, LLC                                                         | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 51682799           | Banc of America Leasing & Capital, LLC                                                         | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 60647743           | CSI Leasing, Inc.                                                                                  | Certain leased equipment                                            |
| Insituform Technologies, Inc. (Delaware)      | 73614772           | De Lage Landen Financial Services, Inc.                                                            | Certain leased equipment                                            |
| Insituform Technologies USA, Inc. (Delaware)  | 62055416           | Herc Exchange, LLC                                                                                 | Two (2) specific Pioneer Pump/Trash/Vac AssistantS/N: 6286 and 6287 |
| Insituform Technologies USA, Inc. (Delaware)  | 62531713           | Herc Exchange, LLC                                                                                 | One (1) specific Pioneer PumpS/N:  6386                   |
| Insituform Technologies USA, Inc. (Delaware)  | 62531721      | Herc Exchange, LLC                                                                                 | One (1) specific Pioneer PumpS/N:  6385                   |
| Affholder, Inc. (Missouri)                         |  20020005523E | Citizens Leasing Corporation and Banc of America Leasing and Capital, LLC                          | Certain leased equipment                                       |

----

|  Debtor                               |  File Number  | Secured Party                                |  Collateral Description                                                                          |
|--------------------------------------------|--------------------|----------------------------------------------|-------------------------------------------------------------------------------------------------------|
| Affholder, Inc. (Missouri)            |  20070109091M | Great American Group, LLC                    | Certain leased equipment                                                                              |
| The Bayou Companies, Inc. (Delaware)  | 23-05-2968    | Maverick Tube, L.P.                          | All tube, pipe and other goods or products delivered to bailee pursuant to Consignment Agreement      |
| Kinsel Industries, Inc. (Texas)       | 99-059818          | Safeco Credit Company, Inc. Dallas Division  | Specific list of equipment, including S/Ns                                                            |
| Kinsel Industries, Inc. (Texas)       | 99-103916          | Safeco Credit Company, Inc. Dallas Division  | Three (3) JCB Model 214 Series III Tractor-Loader Backhoes, S/N:  470866, 470927 and 470861 |
| Kinsel Industries, Inc. (Texas)       | 99-162453          | Deere Credit, Inc.                           | Specific list of John Deere equipment by S/N                                                          |
| Kinsel Industries, Inc. (Texas)       | 99-184010          | Safeco Credit Company, Inc. Dallas Division  | Specific list of equipment by S/N                                                                     |
| Kinsel Industries, Inc. (Texas)       | 00-536443          | Safeco Credit Company, Inc.                  | Specific equipment by S/N                                                                             |
| Kinsel Industries, Inc. (Texas)       | 00-559665          | Safeco Credit Company, Inc. Dallas Division  | Specific equipment by S/N                                                                             |
| Kinsel Industries, Inc. (Texas)       | 00-609435          | Associates Leasing, Inc.                     | One (1) CMI Model PR800-7 Pavement Profiler S/N 5362902                                               |
| Kinsel Industries, Inc. (Texas)       | 00-650068          | Safeco Credit Co., Inc. DBA Safeline Leasing | Specific equipment by S/N                                                                             |
| Kinsel Industries, Inc. (Texas)       | 01-011571          | Sage Capital Corporation                     | Specific equipment by S/N                                                                             |
| Kinsel Industries, Inc. (Texas)       | 01-017150          | Safeco Credit Company, Inc. Dallas Division  | Specific equipment by S/N                                                                             |
| Kinsel Industries, Inc. (Texas)       | 01-030041          | Caterpillar Financial Services Corporation   | Specific equipment by S/N                                                                             |
| Bayou Welding Works, LLC (Louisiana)  | 09-1108492         | GreatAmerica Leasing Corporation             | Various Savin Copiers, Scanners, Fax and Printer                                                      |
| The Corrpro Companies, Inc. (Ohio)    | AP313039           | Ameritech Credit Corporation                 | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00100098208      | Inter-Tel Leasing Inc.                       | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00112935672      | IOS Capital                                  | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00112935783      | IOS Capital                                  | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00113099700      | IOS Capital                                  | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00113750964      | IOS Capital                                  | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00116396955      | IOS Capital                                  | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00116400350      | IOS Capital                                  | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00116400461      | IOS Capital                                  | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00116435777      | IOS Capital                                  | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00116443320      | IOS Capital                                  | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00116576957      | Ikon Financial Svcs                          | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00116689895      | Ikon Financial Svcs                          | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00116693733      | Ikon Financial Svcs                          | Certain leased equipment                                                                              |
| The Corrpro Companies, Inc. (Ohio)    | OH00116783178      | Ikon Financial Svcs                          | Certain leased equipment                                                                              |

----

| Debtor                                   |  File Number         |  Secured Party                                     |  Collateral Description |
|------------------------------------------|---------------------------|---------------------------------------------------------|------------------------------|
| The Corrpro Companies, Inc. (Ohio)  | OH00116785192             | Ikon Financial Svcs                                     | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00118073337             | Morgan Stanley Asset Funding, Inc., as Collateral Agent | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00118270325             | Morgan Stanley Asset Funding, Inc., as Collateral Agent | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00118344908             | Morgan Stanley Asset Funding, Inc., as Collateral Agent | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00118645168             | Morgan Stanley Asset Funding, Inc., as Collateral Agent | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00118650563             | Morgan Stanley Asset Funding, Inc., as Collateral Agent | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00118777450             | Morgan Stanley Asset Funding, Inc., as Collateral Agent | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00118909209             | Ikon Financial Svcs                                     | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00125512176             | Morgan Stanley Asset Funding, Inc., as Collateral Agent | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00126330272             | AmeriServ Financial Bank                                | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00126567526             | AmeriServ Financial Bank                                | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00127470340             | AmeriServ Financial Bank                                | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00128110036             | AmeriServ Financial Bank                                | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00128508261             | AmeriServ Financial Bank                                | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00129055352             | AmeriServ Financial Bank                                | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00129167400             | AmeriServ Financial Bank                                | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00130001726             | AmeriServ Financial Bank                                | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00130372408             | AmeriServ Financial Bank                                | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  | OH00130372519             | AmeriServ Financial Bank                                | Certain leased equipment     |
| The Corrpro Companies, Inc. (Ohio)  |   OH00130548784 | AmeriServ Financial Bank                                | Certain leased equipment     |

| (1) | The leased equipment covered by the financing statements above are subject to “true” leases and do not represent financed debt or capital leases.  These financing statements are intended as precautionary filings as allowed by §9-505 of the Uniform Commercial Code. |
|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | 1. | Registered Charge dated May 9, 1997 in favour of National Westminster Bank PLC, secured against Title Number CE105108 at the Land Registry of England and Wales |
|--------|----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| 1.   | See Schedule 6.13 for a list of Borrower’s Subsidiaries. |
|----------------|----------------------------------------------------------------|

| 2.   | Investments in Other Persons |
|----------------|------------------------------|

| Company Name                                          | Place of Formation   | Ownership                                                                 |
|-------------------------------------------------------|----------------------|---------------------------------------------------------------------------|
| Bayou Coating, LLC                               | Louisiana            | The Bayou Companies, Inc. owns 49% of membership interests                |
| Bayou Flow Technologies, LLC                     | Delaware             | The Bayou Companies, Inc. owns 33.3% of membership interests              |
| Insituform Asia Limited                          | Hong Kong, China     | Insituform Technologies Netherlands BV owns 50% of shares                 |
| Insituform Environmental Techniques Ltd.         | Ireland              | Insituform Technologies Limited [UK] owns 50% of shares                   |
| Insituform Gulf Company LLC (a)                  | United Arab Emirates | Insituform Technologies Limited [UK] owns 49% of shares                   |
| Insituform Hulin s.r.o.                               | Hungary              | Insituform-Hulin Rohrsanierungstech­niken S.R.O. owns 100% of shares |
| Insituform Leitungssanierung GmbH                | Austria              | Insituform Rohrsanierungstechniken GmbH owns 100% of shares               |
| Insituform Pacific Pty Limited                   | Australia            | Insituform Technologies Netherlands BV owns 50% of shares                 |
| Insituform Rohrsanierungstechniken GmbH          | Germany              | Insituform Holdings (UK) Limited owns 50% of shares                       |
| Insituform s.r.o.                                | Czech Republic       | Insituform-Hulin Rohrsanierungstech­niken S.R.O. owns 100% of shares |
| Insituform SPML JV                               | India                | Insituform Technologies, Inc. owns 50% of joint venture interest          |
| Insituform-Hulin Rohrsanierungstechniken S.R.O.  | Slovakia             | Insituform Rohrsanierungstechniken GmbH owns 51% of shares                |
| Italicontrolli-Insituform, S.r.l. (a)                 | Italy                | INA Acquisition Corp. owns 50% of shares                                  |

| (a) | Entity in dissolution / liquidation or to be dissolved. |
|-----|---------------------------------------------------------|

| 3.   | Insituform Technologies, Inc., either directly or through a Subsidiary or one of the entities listed above, enters into contractual joint ventures from time to time to capitalize on its trenchless rehabilitation processes.  Under these contractual joint venture relationships, work is bid by the joint venture entity and subcontracted to the joint venture partners or to third parties.  The joint venture partners are primarily responsible for their subcontracted work, but both joint venture partners are liable to the customer for all of the work. |
|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 4.   | INA Acquisition Corp. has agreed to loan Insituform Technologies Netherlands BV €3,300,000.  These funds will be drawn down by Insituform Technologies Netherlands BV as needed to fund a loan from Insituform Technologies Netherlands BV to Insituform Pipeline Rehabilitation Private Limited. |
|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 5.   | Insituform Technologies, Inc. has loaned funds to Insituform Technologies Netherlands BV for capital contributions to Insituform Pipeline Rehabilitation Private Limited, in the amount of $442,108 as of March 24, 2009. |
|----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 6.   | Insituform Technologies, Inc. has loaned funds to Insituform Technologies Netherlands BV for further loan to Insituform Hong Kong Limited, in the amount of $300,000 as of March 24, 2009. |
|----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 7.   | Insituform Technologies, Inc. has sold tube, equipment, supplies and/or training and technical support to Insituform Asia Limited and Insituform Pacific Pty Limited, for which payment has not been made to date.  As of March 24, 2009, Insituform Asia Limited owes $1,467,123 and Insituform Pacific Pty Limited owes $899,813 to Insituform Technologies, Inc. |
|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 8.   | Mississippi Textiles Corporation has sold tube to Insituform Asia Limited, for which payment has not been made to date.  As of March 24, 2009, Insituform Asia Limited owes $907,422 to Mississippi Textiles Corporation. |
|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 9.   | INA Acquisition Corp. has entered into intellectual property license agreements with Insituform Asia Limited and Insituform Pacific Pty Limited, under which royalties have not been paid to date.  As of March 24, 2009, Insituform Asia Limited owes $238,909 and Insituform Pacific Pty Limited owes $88,029 to INA Acquisition Corp. |
|----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|  Issuer                  | Applicant                     | Beneficiary                        | Letter of Credit Number | Amount          | Expiration |
|-------------------------------|-------------------------------|------------------------------------|-------------------------|-----------------|------------|
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | HM REVENUE & CUSTOMS           | 234947                  | £80,000.00 | 10/17/09   |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | YEMGAS FZCO                        | 319578                  | £11,723.73 | 08/31/2011 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | TPC PARTNERSHIP                    | 319943                  | £73,779.46 | 08/31/2012 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | SAKHALIN ENERGY INVESTMENT CO LTD. | 321991                  | £18,730.37 | 12/31/2010 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | PETROJET                           | 322243                  | £908.22    | 02/28/2009 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | BELAYIM PETROLEUM COMPANY          | 324127                  | £3,304.19  | 06/30/2010 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | UNITED GAS DERIVATIVES COMPANY     | 324177                  | £8,400.00  | 12/31/2009 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | GULF OF SUEZ PETROLEUM COMPANY     | 324737                  | £9,398.50  | 01/31/2009 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | PENTA SPU                          | 324746                  | £48,511.59 | 03/25/2011 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | GEIE SAIPEM                        | 326221                  | £10,413.88 | 11/30/2011 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | SAKHALIN ENERGY INVESTMENT CO LTD. | 326272                  | £2,248.01  | 12/31/2010 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | BELAYIM PETROLEUM COMPANY          | 326691                  | £294.84    | 03/31/2009 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | NATIONAL GAS CO                    | 326855                  | £1,991.51  | 12/31/2009 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | PETROJET                           | 326881                  | £1,028.91  | 11/30/2009 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | ENPPI                              | 326888                  | £13,555.65 | 03/31/2009 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | GULF OF SUEZ PETROLEUM COMPANY     | 326977                  | £18,797.00 | 07/31/2010 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | GULF OF SUEZ PETROLEUM COMPANY     | 327200                  | £3,307.04  | 07/31/2010 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | PETROJET                           | 327580                  | £915.32    | 05/31/2009 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | PETROJET                           | 328178                  | £105.62    | 08/31/2009 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | PETROJET                           | 328328                  | £115.53    | 08/24/2009 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | GULF OF SUEZ PETROLEUM COMPANY     | 328500                  | £1,355.56  | 09/31/2009 |
| National Westminster Bank Plc | Corrpro Companies Europe Ltd. | VITALIS KKS                        | 328597                  | £33,527.00 | 06/30/2009 |

----

| 1.   | Corrpro Companies, Inc. is party to a Consulting Agreement dated November 3, 2008 with SMD Enterprises, a business owned by a member of the family of David H. Kroon, Executive Vice President of the Company. SMD Enterprises is a business owned by Susan M. Dobis (maiden name of Susan M. Kroon, wife of David H. Kroon). SMD Enterprises is a certified Women’s Business Enterprise (WBE) with the City of Houston and is a member of the Corrpro Companies, Inc.’s team for its contract with the City of Houston.  This Agreement will survive closing. |
|----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 2.   | Subject to the approval of Borrower, Corrpro Companies, Inc. may enter into a new Employment Agreement with Barry Borza and/or two (2) separate lease agreements with J.C.R. Holdings, an affiliate of Mr. Borza. |
|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 3.   | Borrower is obligated to honor Indemnification Agreements with the following former directors of Corrpro Companies, Inc.:  Jay I. Applebaum, Thomas P. Briggs, James A. Johnson, David H. Kroon, Robert M. Mayer, Emilio T. Pena, Jason H. Reed, William R. Seelbach, and Stanford Springel. |
|----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 4.   | INA Acquisition Corp. has entered into an Amended and Restated Research and Development Agreement with Insituform Holdings (UK) Limited dated December 31, 2007. |
|----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 5.   | INA Acquisition Corp. has entered into license agreements relating to CIPP and water technology with various Affiliates on terms generally consistent with third party license agreements to which INA Acquisition Corp. is a party. |
|----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 6.   | Insituform Holdings (UK) Limited has entered into a license agreement relating to CIPP technology with Insituform Rohrsanierungstechniken GmbH on terms generally consistent with third party license agreements to which INA Acquisition Corp. is a party. |
|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 7.   | Insituform Technologies, Inc. has entered into license agreements with various Affiliates relating to the United Pipeline Systems® technology with various Affiliates on terms generally consistent with third party license agreements to which Insituform Technologies, Inc. is a party. |
|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 8.   | Various Affiliates of Insituform Technologies, Inc. are parties to management services agreement with other Affiliates of Insituform Technologies, Inc. to provide for reimbursement of managerial and administrative services. |
|----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

----

| Re: | Credit Agreement dated as of March 31, 2009 (as amended, modified, supplemented or extended from time to time, the “Credit Agreement”) among Insituform Technologies, Inc., a Delaware corporation (the “Borrower”), the Guarantors from time to time party thereto, the Lenders from time to time party thereto and Bank of America, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer.  Capitalized terms used but not otherwise defined herein have the meanings provided in the Credit Agreement. |
|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

1

 

----

| Re: | Credit Agreement dated as of March 31, 2009 (as amended, modified, supplemented or extended from time to time, the “Credit Agreement”) among Insituform Technologies, Inc., a Delaware corporation (the “Borrower”), the Guarantors from time to time party thereto, the Lenders from time to time party thereto and Bank of America, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer.  Capitalized terms used but not otherwise defined herein have the meanings provided in the Credit Agreement. |
|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

----

----

----

| Re: | Credit Agreement dated as of March 31, 2009 (as amended, modified, supplemented or extended from time to time, the “Credit Agreement”) among Insituform Technologies, Inc., a Delaware corporation (the “Borrower”), the Guarantors from time to time party thereto, the Lenders from time to time party thereto and Bank of America, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer.  Capitalized terms used but not otherwise defined herein have the meanings provided in the Credit Agreement. |
|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 1. | [Attached hereto as Schedule 1 are the][The] year-end audited financial statements required by Section 7.01(a) of the Credit Agreement for the fiscal year of the Borrower ended as of the above date, together with the report and opinion of an independent certified public accountant required by such section [have been electronically delivered to the Administrative Agent pursuant to the conditions set forth in Section 7.02 of the Credit Agreement]. |
|----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 1. | [Attached hereto as Schedule 1 are the][The] unaudited financial statements required by Section 7.01(b) of the Credit Agreement for the fiscal quarter of the Borrower ended as of the above date [have been electronically delivered to the Administrative Agent pursuant to the conditions set forth in Section 6.02 of the Credit Agreement].  Such financial statements fairly present in all material respects the financial condition, results of operations and cash flows of the Borrower and its Subsidiaries in accordance with GAAP as at such date and for such period, subject only to normal year-end audit adjustments and the absence of footnotes. |
|----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 2. | The undersigned has reviewed and is familiar with the terms of the Credit Agreement and has made, or has caused to be made, a detailed review of the transactions and condition (financial or otherwise) of the Borrower during the accounting period covered by the attached financial statements. |
|----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 3. | A review of the activities of the Borrower during such fiscal period has been made under the supervision of the undersigned with a view to determining whether during such fiscal period the Borrower performed and observed all its Obligations under the Loan Documents, and |
|----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 4. | The representations and warranties of the Loan Parties contained in the Credit Agreement or any other Loan Document, are true and correct on and as of the date hereof, except to the extent that such representations and warranties specifically refer to an earlier date, in which case they are true and correct as of such earlier date, and except that for purposes of this Compliance Certificate, the representations and warranties contained in subsections (a) and (b) of Section 6.05 of the Credit Agreement shall be deemed to refer to the most recent statements furnished pursuant to clauses (a) and (b), respectively, of Section 7.01 of the Credit Agreement, including the statements in connection with which this Compliance Certificate is delivered. |
|----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 5. | Set forth on Schedule [1][2] hereto are true and accurate calculations demonstrating compliance with Section 8.11 of the Credit Agreement on and as of the date of this Compliance Certificate. |
|----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| 1.     | Consolidated Leverage Ratio               |
|--------|------------------------------------------------|
|   | (a)                                            | Consolidated Funded Indebtedness  | $____________                      |
|   | (b)                                            | Consolidated EBITDA  |   |
|   |                                           | (i)  | Consolidated Net Income  | $____________                       |
|   |                                           | (ii)  | Consolidated Interest Charges  | $____________                       |
|   |                                           | (iii)  | federal, state, local and foreign income taxes  | $____________                     |
|   |                                           | (iv)  | depreciation and amortization expense  | $____________                |
|   |                                           | (v)  | for the fiscal quarters ending March 31, 2009, June 30, 2009, September 30, 2009 and December 31, 2009 only, transaction costs of the Borrower, Corrpro and Bayou incurred in connection with the Corrpro Acquisition and the Bayou Acquisition in an aggregate amount not to exceed $18,800,000  |     $____________                      |
|   |                                           | (vi)  | Consolidated EBITDA[sum of (i) though (v) above]  |  $____________                     |
|   | (c)                                            | Consolidated Leverage Ratio [(a)/(b)(vi)]  |  __________:1.0 |
| 2.     | Consolidated Fixed Charge Coverage Ratio  |
|   | (a)                                            | Consolidated Adjusted EBITDAR  | $ ____________                    |
|   |                                           | (i) | Consolidated EBITDA [1(b)(vi) above]  |  $____________ |
|   |                                           | (ii) | rent and lease expense  | $____________ |
|   |                                           | (iii) | Consolidated Capital Expenditures  | $____________ |
|   |                                           | (iv) | Consolidated Taxes  | $____________ |
|   |                                           | (v) | Consolidated Adjusted EBITDAR  [(i)+(ii)-(iii)-(iv)]  |  $____________ |
|   | (b)                                            | Consolidated Fixed Charges  |   |
|   |                                           | (i)  | Consolidated Interest Charges  | $____________ |
|   |                                           | (ii)  | Consolidated Scheduled Funded Debt Payments  |  $____________ |
|   |                                           | (iii) | the amount of cash dividends and other Distributions made by the Borrower  |  $____________ |
|   |                                           | (iv) | rent and lease expense  | $____________ |
|   |                                           | (v) | Consolidated Fixed Charges [sum of (i) though (iv) above]  |  $____________ |
|   | (c)                                            | Consolidated Fixed Charge Coverage Ratio [(a)(v)/(b)(v)]  |  __________:1.0 |
| 3.     | Consolidated Net Worth                         | $____________ |

----

----

----

2

|  3. |   | Borrower: | Insituform Technologies, Inc., a Delaware corporation |
|----------|--------|-----------|-------------------------------------------------------|

|  4. |   | Administrative Agent: | Bank of America, N.A., as the administrative agent under the Credit Agreement |
|----------|--------|-----------------------|-------------------------------------------------------------------------------|

|  5. |   | Credit Agreement: | Credit Agreement, dated as of March 31, 2009, among Insituform Technologies, Inc., a Delaware corporation, the Guarantors from time to time party thereto, the Lenders from time to time party thereto, and Bank of America, N.A., as Administrative Agent, L/C Issuer, and Swing Line Lender |
|----------|--------|-------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  Assignor[s]3 |  Assignee[s]4 |  FacilityAssigned5 | AggregateAmount ofCommitment/Loansfor all Lenders6 | Amount ofCommitment/LoansAssigned | PercentageAssigned ofCommitment/Loans7 |  CUSIP Number |
|--------------------|--------------------|-------------------------|----------------------------------------------------|-----------------------------------|----------------------------------------|-------------------------|
|               |               |                    |                                               |                              |                                   |                    |
|               |               | __________              | $________________                                  | $_________                        | ____________%                          |                    |
|               |               | __________              | $________________                                  | $_________                        | ____________%                          |                    |
|               |               | __________              | $________________                                  | $_________                        | ____________%                          |                    |

8

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