EXHIBIT 99.5 MIDLAND FABRICATORS AND PROCESS SYSTEMS, L.L.C. SUITE 300 3636 N. CAUSEWAY BOULEVARD METAIRIE, LA 70002-7216 PHONE: 504-837-5766 FAX: 504-837-3753 AUGUST 14, 2002 UNIFAB INTERNATIONAL, INC. P.O. Box 11308 New Iberia, LA 70562-1308 VIA FAX 337-373-5627 -------------------- ATTENTION: MR. PETER J. ROMAN Gentlemen: As the holder of the debt contemplated by and created pursuant to that certain Credit Agreement by and among UNIFAB International, Inc. ("Borrower") and Bank One, Louisiana, National Association (as agent) and the Lenders party thereto, dated as of November 30, 1999, as subsequently amended on various occasions (the "Credit Agreement"), Midland Fabricators and Process Systems, L.L.C. hereby waives as of the date hereof any default in payment and/or violation of the covenants and provisions of the Credit Agreement. Yours very truly, MIDLAND FABRICATORS AND PROCESS SYSTEMS, L.L.C. /S/ Frank J. Cangelosi, Jr. - --------------------------- Frank J. Cangelosi, Jr. Secretary - Treasurer