FOURTH AMENDMENT AND SUPPLEMENT TO CREDIT AGREEMENT This Fourth Amendment and Supplement to Credit Agreement (herein called the "Fourth Amendment") is dated and effective as of December 23, 1996, by and among NEWPARK RESOURCES, INC., a Delaware corporation (the "Borrower"), SOLOCO L.L.C., a Louisiana limited liability company and the successor by merger to SOLOCO, Inc. ("SOLOCO L.L.C."), NEWPARK SHIPHOLDING TEXAS, L.P., a Texas limited partnership ("Newpark Shipholding"), SOLOCO TEXAS, L.P., a Texas limited partnership ("SOLOCO Texas"), BATSON-MILL, L.P., a Texas limited partnership ("Batson"), MALLARD & MALLARD OF LA., INC., a Louisiana corporation ("Mallard"), NEWPARK TEXAS, L.L.C., a Louisiana limited liability company ("Newpark Texas"), NEWPARK HOLDINGS, INC., a Louisiana corporation ("Holdings"), NEWPARK ENVIRONMENTAL SERVICES, L.L.C., a Louisiana limited liability company and the successor by merger to Newpark Environmental Services, Inc. ("Environmental L.L.C."), and NEWPARK ENVIRONMENTAL SERVICES, L.P., a Texas limited partnership ("Environmental L.P."; SOLOCO L.L.C., Newpark Shipholding, SOLOCO Texas, Batson, Mallard, Newpark Texas, Holdings, Environmental L.L.C. and Environmental L.P. are herein collectively called the "Guarantors"), and HIBERNIA NATIONAL BANK ("Hibernia"), and BANK ONE, LOUISIANA, N.A. ("Bank One Louisiana") (f/k/a PREMIER BANK, NATIONAL ASSOCIATION) (Hibernia and Bank One Louisiana are hereinafter referred to individually as "Bank" and collectively as the "Banks"), and BANK ONE, LOUISIANA, N.A. (f/k/a PREMIER BANK, NATIONAL ASSOCIATION) as agent for the Banks (hereinafter in such capacity referred to as the "Agent"). RECITALS: 1. The Borrower, the Guarantors (except Environmental L.L.C. and Environmental L.P.), Newpark Environmental Services, Inc., Newpark Environmental Water Services, Inc., SOLOCO, Inc., the Banks, Bank One Texas, N.A., and the Agent are parties to that certain Credit Agreement dated as of June 29, 1995 (the "Credit Agreement"), as amended and modified by letter agreements thereto dated October 9, 1995 and January 8, 1996 (the said letter agreements are herein referred to as the "First Amendment"), by Second Amendment and Supplement to Credit Agreement dated as of March 5, 1996 (the "Second Amendment"), and by Third Amendment and Supplement to Credit Agreement dated as of June 27, 1996 (the "Third Amendment"). The Credit Agreement, as amended by the First Amendment, the Second Amendment, and the Third Amendment, is herein referred to as the Credit Agreement. 2. Bank One Texas, N.A. is no longer a party to the Credit Agreement. Pursuant to assignments, Bank One Texas, N.A. has assigned its Revolving Note and Term Note to Bank One Louisiana. 3. The Borrower and the Guarantors have requested that the Banks (i) eliminate the Line of Credit Borrowing Base, (ii) accept quarterly financial reports instead of monthly financial reports, (iii) allow the Borrower and the Guarantors to incur on an annual basis not more than $5,000,000.00 in the aggregate of other indebtedness, (iv) approve the Borrower's guarantee of the indebtedness of Newpark Shipholding associated with the shipyard previously owned by Newpark Shipholding, said guarantee not to exceed $10,000,000.00, and (v) allow the Borrower and the Guarantors to guarantee indebtedness up to the total aggregate amount of $5,000,000.00 without obtaining the Banks' or the Agent's approval. 4. The Banks are willing to accommodate the aforesaid requests, subject to the following conditions: (i) the execution of this Fourth Amendment by the Borrower and the Guarantors; and (ii) delivery by the Borrower and the Guarantors to the Agent of certified resolutions authorizing the agreements contemplated by this Fourth Amendment. 5. All capitalized terms used herein are used as defined in the Credit Agreement, except as otherwise expressly provided in this Fourth Amendment. NOW THEREFORE, in consideration of the premises, the parties hereto do hereby amend and supplement the Credit Agreement, and agree and obligate themselves as follows: A. ELIMINATION OF LINE OF CREDIT BORROWING BASE. Section 1.03 of the Credit Agreement are hereby deleted. In addition, all other references in the Credit Agreement to the Line of Credit Borrowing Base are hereby deleted. B. FINANCIAL REPORTING REVISION. Section 7.01 of the Credit Agreement is hereby amended to delete the requirement that the Borrower furnish monthly consolidated interim financial statements, and supplemented to include the following: The Borrower shall furnish to the Agent and the Banks within forty- five (45) days after the close of each quarter, a consolidated interim financial statement (which may or may not conform to generally accepted accounting principles) consisting of a balance sheet and income statement). C. NEGATIVE COVENANTS REVISION. 1. GUARANTEES. Section 9.01 of the Credit Agreement is hereby deleted in its entirety and replaced with the following: 9.01. Guarantees. Except for the (i) Continuing Guarantees contemplated under Subsection 4.01(b) above, (ii) guarantees by the Borrower required for the normal day- to-day operations of the Guarantors, (iii) guarantees by the Borrower or any of the Guarantors to third parties in an aggregate amount not to exceed $5,000,000.00, and (iv) guarantee not to exceed $10,000,000.00 by the Borrower of the indebtedness of Newpark Shipholding associated with the shipyard previously owned by Newpark Shipholding, the Borrower and the Guarantors shall not become a guarantor, surety, or otherwise liable for the debts or other obligations of any person, firm or corporation. 2. OTHER INDEBTEDNESS. Section 9.02 of the Credit Agreement is hereby deleted in its entirety and replaced with the following: 9.02. Other Indebtedness. Until the full and final payment of the Secured Notes the Borrower and each of the Guarantors shall not create or incur any direct indebtedness in excess of $5,000,000.00 in the aggregate on an annual basis, without first obtaining the prior written consent of the Agent. The aggregate annual limit of $5,000,000.00 was fixed by the Bank to allow the Borrower and Guarantors to take advantage of below market interest rates on construction equipment purchases or financing of equipment in connection with export to foreign markets. D. CONFIRMATION OF CROSS COLLATERALIZATION AND CROSS DEFAULT. The parties hereto agree that the Notes and Secured Notes shall continue to be secured by the security interests, mortgages, agreements and guarantees described in, and executed pursuant to, the Credit Agreement. Similarly, the Notes and Secured Notes shall continue to be subject to the Events of Default specified in the Credit Agreement. E. MISCELLANEOUS PROVISIONS. 1. The Borrower agrees that nothing contained in this Fourth Amendment shall constitute a novation. 2. In consideration of the Bank's execution of this Fourth Amendment, the Borrower and the Guarantors do hereby irrevocably waive any and all claims and/or defenses to payment on the indebtedness owed by any of them to the Banks that may exist as of the date of execution of this Fourth Amendment. 3. The Credit Agreement, as amended and supplemented by this Fourth Amendment, is hereby ratified and confirmed. 4. THE INTERNAL LAWS OF THE STATE OF LOUISIANA AND OF THE UNITED STATES OF AMERICA SHALL GOVERN THE RIGHTS AND DUTIES OF THE PARTIES HERETO AND THE VALIDITY, CONSTRUCTION, ENFORCEMENT, AND INTERPRETATION OF THE CREDIT AGREEMENT, THIS FOURTH AMENDMENT, AND ALL LOAN PAPERS EXECUTED IN CONNECTION THEREWITH EXCEPT TO THE EXTENT OTHERWISE SPECIFIED IN THE CREDIT AGREEMENT, AS AMENDED BY THIS FOURTH AMENDMENT, OR IN ANY OF THE RELATED LOAN PAPERS. 5. THE CREDIT AGREEMENT AND THIS FOURTH AMENDMENT ARE CREDIT OR LOAN AGREEMENTS AS DESCRIBED IN LA. R.S. 6: 1121, ET. SEQ. THERE ARE NO ORAL AGREEMENTS BETWEEN THE BANKS AND THE BORROWER. 6. THE CREDIT AGREEMENT, AS AMENDED BY THIS FOURTH AMENDMENT, SETS FORTH THE ENTIRE AGREEMENT OF THE PARTIES WITH RESPECT TO THE SUBJECT MATTER HEREOF AND SUPERSEDES ALL PRIOR WRITTEN AND ORAL UNDERSTANDINGS BETWEEN THE BORROWER AND THE GUARANTORS ON ONE HAND, AND THE BANKS AND/OR THE AGENT ON THE OTHER HAND, WITH RESPECT TO THE MATTERS HEREIN SET FORTH. THE CREDIT AGREEMENT, AS AMENDED BY THIS FOURTH AMENDMENT, MAY NOT BE MODIFIED OR AMENDED EXCEPT BY A WRITING SIGNED AND DELIVERED BY THE BORROWER, THE GUARANTORS, THE BANKS, AND THE AGENT. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES. 7. IN THE EVENT IT IS NECESSARY FOR THE AGENT AND/OR THE BANK TO RESORT TO JUDICIAL ACTION TO ENFORCE ITS/THEIR RIGHTS HEREUNDER, THEN THE BORROWER AND GUARANTORS HEREBY AGREE THAT TO THE EXTENT PERMITTED BY APPLICABLE LAW ANY SUCH JUDICIAL ACTION, INCLUDING ANY OPPOSITION TO SUCH ACTION, RECONVENTIONAL DEMANDS, AND CROSS CLAIMS, SHALL BE TRIED BEFORE A JUDGE WITHOUT A JURY, ALL PARTIES HERETO HEREBY WAIVING THEIR RIGHT TO A JURY TRIAL. BORROWER: NEWPARK RESOURCES, INC. BY:______________________________ MATTHEW W. HARDEY, VICE PRESIDENT OF FINANCE AND CHIEF FINANCIAL OFFICER GUARANTORS: NEWPARK ENVIRONMENTAL SERVICES, L.L.C. By:______________________________ MATTHEW W. HARDEY, TREASURER NEWPARK SHIPHOLDING TEXAS, L.P. By: Newpark Holdings, Inc., as General Partner By:______________________________ MATTHEW W. HARDEY, VICE PRESIDENT SOLOCO TEXAS, L.P. By: Newpark Holdings, Inc., as General Partner By:______________________________ MATTHEW W. HARDEY, VICE PRESIDENT BATSON-MILL, L.P. By: Newpark Holdings, Inc., as General Partner By:______________________________ MATTHEW W. HARDEY, VICE PRESIDENT NEWPARK ENVIRONMENTAL SERVICES, L.P. By: Newpark Holdings, Inc., as General Partner By:______________________________ MATTHEW W. HARDEY, VICE PRESIDENT MALLARD & MALLARD OF LA., INC. By:______________________________ MATTHEW W. HARDEY, TREASURER SOLOCO, L.L.C. By:______________________________ MATTHEW W. HARDEY, TREASURER NEWPARK TEXAS, L.L.C. By:______________________________ MATTHEW W. HARDEY, VICE PRESIDENT NEWPARK HOLDINGS, INC. By:______________________________ MATTHEW W. HARDEY, VICE PRESIDENT BANKS: HIBERNIA NATIONAL BANK By:______________________________ Title:___________________________ BANK ONE, LOUISIANA, N.A. By:______________________________ Title: Vice President AGENT: BANK ONE, LOUISIANA, N.A. By:____________________________ Title: Vice-President 32983.327