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                               AMERICAN ECO CORPORATION

                                         AND

                  THE GUARANTORS NAMED ON THE SIGNATURE PAGE HERETO






                                     $120,000,000

                        9 5/8% SERIES A SENIOR NOTES DUE 2008





                            REGISTRATION RIGHTS AGREEMENT

                               DATED AS OF MAY 21, 1998




                              JEFFERIES & COMPANY, INC.
                            NESBITT BURNS SECURITIES INC.








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               This Registration Rights Agreement (this "Agreement") is
                                                         ---------
          made and entered into as of May 21, 1998 by and among American
          Eco Corporation, an Ontario, Canada corporation (the "Company"),
                                                                -------
          each of the subsidiary guarantors listed on the signature page
          hereto (each a "Guarantor" and, collectively, the "Guarantors"),
                          ---------                          ----------
          and Jefferies & Company, Inc. and Nesbitt Burns Securities Inc.
          (each an "Initial Purchaser" and, collectively, the "Initial
                    -----------------                          -------
          Purchasers"), who have agreed to purchase $120,000,000 aggregate
          -----------
          principal amount of the Company's 9 5/8% Series A Senior Notes
          due 2008 (the "Series A Notes") pursuant to the Purchase
                         --------------
          Agreement (as defined below).

               This Agreement is made pursuant to the Purchase Agreement,
          dated May 14, 1998 (the "Purchase Agreement"), by and among the
                                   ------------------
          Company, the Guarantors and the Initial Purchasers.  In order to
          induce the Initial Purchasers to purchase the Series A Notes, the
          Company has agreed to provide the registration rights set forth
          in this Agreement.  The execution and delivery of this Agreement
          is a condition to the obligations of the Initial Purchasers set
          forth in Section 3 of the Purchase Agreement.

               The parties hereby agree as follows:


          SECTION 1.          DEFINITIONS

               As used in this Agreement, the following capitalized terms
          shall have the following meanings:

                    Act:  The Securities Act of 1933, as amended.
                    ---

                    Advice:  As defined in Section 6.
                    ------

                    Broker-Dealer:  Any broker or dealer registered under
                    -------------
               the Exchange Act.

                    Closing Date:  The date on which the Series A Notes are
                    ------------
               originally issued under the Indenture.

                    Commission:  The Securities and Exchange Commission.
                    ----------

                    Consummate:  The Exchange Offer shall be deemed
                    ----------
               "Consummated" for purposes of this Agreement upon the
               occurrence of (i) the filing and effectiveness under the Act
               of the Exchange Offer Registration Statement relating to the
               Series B Notes to be issued in the Exchange Offer, (ii) the
               maintenance of such Registration Statement continuously
               effective and the keeping of the Exchange Offer open for a
               period not less than the minimum period required pursuant to
               Section 3(b) hereof, and (iii) the delivery by the Company
               to the Registrar under the Indenture of Series B Notes in
               the same aggregate principal amount as the aggregate
               principal amount of Series A Notes that were tendered by
               Holders thereof pursuant to the Exchange Offer.

                    Damages Payment Date:  With respect to the Series A
                    --------------------
               Notes, each Interest Payment Date.

                    Effectiveness Target Date:  As defined in Section 5.
                    -------------------------

                    Exchange Act:  The Securities Exchange Act of 1934, as
                    ------------
               amended. 

                    Exchange Offer:  The registration by the Company under
                    --------------
               the Act of the Series B Notes pursuant to a Registration
               Statement pursuant to which the Company offers the Holders
               of all outstanding Transfer Restricted Securities the
               opportunity to exchange all such outstanding Transfer
               Restricted Securities held by such Holders for Series B
               Notes in an aggregate principal amount equal to the
               aggregate principal amount of the Transfer Restricted
               Securities tendered in such exchange offer by such Holders.

                    Exchange Offer Registration Statement:  The
                    -------------------------------------
               Registration Statement relating to the Exchange Offer,
               including the related Prospectus.

                    Exempt Resales:  The transactions in which the Initial
                    --------------
               Purchasers propose to sell the Series A Notes (i) to certain
               "qualified institutional buyers," as such term is defined in
               Rule 144A under the Act, (ii) to certain institutional
               "accredited investors," as such term is defined in Rule
               501(a)(1), (2), (3) and (7) of Regulation D under the Act
               ("Accredited Institutions") and (iii) outside the United
                 -----------------------
               States to certain non-U.S. Persons meeting the requirements
               of Rule 904 under the Act. 

                    Holders:  As defined in Section 2(b) hereof.
                    -------

                    Indemnified Holder:  As defined in Section 8(a) hereof.
                    ------------------

                    Indenture:  The Indenture, dated as of even date
                    ---------
               herewith,  among the Company, State Street Bank and Trust
               Company, as trustee (the "Trustee"), and the Guarantors,
                                         -------
               pursuant to which the Notes are to be issued, as such
               Indenture is amended or supplemented from time to time in
               accordance with the terms thereof.

                    Initial Purchaser and Initial Purchasers:  As defined
                    -----------------     ------------------
               in the preamble hereto.

                    Interest Payment Date:  As defined in the Indenture and
                    ---------------------
               the Notes.

                    NASD:  National Association of Securities Dealers, Inc.
                    ----

                    Notes: The Series A Notes and the Series B Notes.
                    -----

                    Person:  An individual, partnership, corporation,
                    ------
               trust, limited liability company or unincorporated
               organization, or a government or agency or political
               subdivision thereof.

                    Prospectus:  The prospectus included in a Registration
                    ----------
               Statement, as amended or supplemented by any prospectus
               supplement and by all other amendments thereto, including
               post-effective amendments, and all material incorporated by
               reference into such Prospectus.

                    Record Holder:  With respect to any Damages Payment
                    -------------
               Date relating to Notes, each Person who is a Holder of Notes
               on the record date with respect to the Interest Payment Date
               on which such Damages Payment Date shall occur.

                    Registration Default:  As defined in Section 5 hereof.
                    --------------------

                    Registration Statement:  Any registration statement of
                    ----------------------
               the Company relating to (a) an offering of Series B Notes
               and the Subsidiary Guarantees pursuant to an Exchange Offer
               or (b) the registration for resale of Transfer Restricted
               Securities pursuant to the Shelf Registration Statement
               which is filed pursuant to the provisions of this Agreement,
               in each case, including the Prospectus.

                    Series A Notes:  As defined in the Preamble hereof.
                    --------------

                    Series B Notes:  The Company's 9 5/8% Series B Senior
                    --------------
               Notes due 2008 to be issued pursuant to the Indenture and
               the Exchange Offer.

                    Shelf Filing Deadline:  As defined in Section 4 hereof.
                    ---------------------

                    Shelf Registration Statement:  As defined in Section 4
                    ----------------------------
               hereof. 

                    Subsidiary Guarantees:  The joint and several
                    ---------------------
               guarantees of the Company's payment obligations under the
               Notes by the Guarantors.

                    TIA: The Trust Indenture Act of 1939 (15 U.S.C. Section
                    ---
               77aaa-77bbbb) as in effect on the date of the Indenture.

                    Transfer Restricted Securities:  Each Series A Note
                    ------------------------------
               until (i) the date on which such Series A Note has been
               exchanged by a Person other than a Broker-Dealer for a
               Series B Note in the Exchange Offer, (ii) following the
               exchange by a Broker-Dealer in the Exchange Offer of a
               Series A Note for a Series B Note, the date on which such
               Series B Note is sold to a purchaser who receives from such
               Broker-Dealer on or prior to the date of such sale a copy of
               the Prospectus contained in the Exchange Offer Registration
               Statement, (iii) the date on which such Series A Note has
               been effectively registered under the Act and disposed of in
               accordance with the Shelf Registration Statement or (iv) the
               date on which such Series A Note is distributed to the
               public pursuant to Rule 144 under the Act or may be
               distributed to the public pursuant to Rule 144(k) under the
               Act.

                    Underwritten Registration or Underwritten Offering:  A
                    -------------------------    ---------------------
               registration in which securities of the Company are sold to
               an underwriter for reoffering to the public.

          SECTION 2.          SECURITIES SUBJECT TO THIS AGREEMENT

               (a)  Transfer Restricted Securities.  The securities
                    ------------------------------
          entitled to the benefits of this Agreement are the Transfer
          Restricted Securities.

               (b)  Holders of Transfer Restricted Securities.  A Person is
                    -----------------------------------------
          deemed to be a holder of Transfer Restricted Securities (each, a
          "Holder") whenever such Person owns Transfer Restricted 
           ------
          Securities of record.

          SECTION 3.          REGISTERED EXCHANGE OFFER

               (a)  Unless the Exchange Offer shall not be permissible
          under applicable law or Commission policy (after the procedures
          set forth in Section 6(a) below have been complied with), the
          Company and the Guarantors shall (i) cause to be filed with the
          Commission on or before the 60th day after the Closing Date, a
          Registration Statement under the Act relating to the Series B
          Notes, the Subsidiary Guarantees and the Exchange Offer, (ii) use
          their reasonable best efforts to cause such Registration
          Statement to become effective on or before the 135th day after
          the Closing Date, (iii) in connection with the foregoing, file
          (A) all pre-effective amendments to such Registration Statement
          as may be necessary in order to cause such Registration Statement
          to become effective, (B) if applicable, a post-effective
          amendment to such Registration Statement pursuant to Rule 430A
          under the Act and (C) cause all necessary filings in connection
          with the registration and qualification of the Series B Notes and
          the Subsidiary Guarantees to be made under the Blue Sky laws of
          such jurisdictions as are necessary to permit the Exchange Offer
          to be Consummated, and (iv) upon the effectiveness of such
          Registration Statement, commence the Exchange Offer.  The
          Exchange Offer Registration Statement shall be on the appropriate
          form under the Act permitting registration of the Series B Notes
          to be offered in exchange for the Transfer Restricted Securities
          and to permit resales of the Series B Notes held by Broker-
          Dealers as contemplated by Section 3(c) below.

               (b)  The Company and the Guarantors shall cause the Exchange
          Offer Registration Statement to be effective continuously and
          shall keep the Exchange Offer open for a period of not less than
          the minimum period required under applicable federal and state
          securities laws to Consummate the Exchange Offer; provided,
          however, that in no event shall such period be less than 20
          business days.  The Company and the Guarantors shall cause the
          Exchange Offer to comply with all applicable federal and state
          securities laws.  No securities other than the Series B Notes and
          the Subsidiary Guarantees shall be included in the Exchange Offer
          Registration Statement.  The Company and the Guarantors shall use
          their reasonable best efforts to cause the Exchange Offer to be
          Consummated on the earliest practicable date after the Exchange
          Offer Registration Statement has become effective, but in any
          event on or prior to the 180th day after the Closing Date.

               (c)  The Company and the Guarantors shall indicate in a
          "Plan of Distribution" section contained in the Exchange Offer
          Registration Statement that any Broker-Dealer who holds Notes
          that are Transfer Restricted Securities and that were acquired
          for its own account as a result of market-making activities or
          other trading activities (other than Transfer Restricted
          Securities acquired directly from the Company) may exchange such
          Series A Notes pursuant to the Exchange Offer; however, such
          Broker-Dealer may be deemed to be an "underwriter" within the
          meaning of the Act and must, therefore, deliver a prospectus
          meeting the requirements of the Act in connection with any
          resales of the Series B Notes received by such Broker-Dealer in
          the Exchange Offer, which prospectus delivery requirement may be
          satisfied by the delivery by such Broker-Dealer of the Prospectus
          contained in the Exchange Offer Registration Statement.  Such
          "Plan of Distribution" section shall also contain all other
          information with respect to such resales by Broker-Dealers that
          the Commission may require in order to permit such resales
          pursuant thereto, but such "Plan of Distribution" shall not name
          any such Broker-Dealer or disclose the amount of Notes held by
          any such Broker-Dealer except to the extent required by the
          Commission as a result of a change in policy after the date of
          this Agreement.

                    The Company and the Guarantors shall use their
          reasonable best efforts to keep the Exchange Offer Registration
          Statement continuously effective, supplemented and amended as
          required by the provisions of Section 6(c) below to the extent
          necessary to ensure that it is available for resales of Notes
          acquired by Broker-Dealers for their own accounts as a result of
          market-making activities or other trading activities, and to
          ensure that it conforms with the requirements of this Agreement,
          the Act and the policies, rules and regulations of the Commission
          as announced from time to time, for a period of one year from the
          date on which the Exchange Offer Registration Statement is
          declared effective.

                    The Company and the Guarantors shall provide sufficient
          copies of the latest version of such Prospectus to Broker-Dealers
          promptly upon request at any time during such one-year period in
          order to facilitate such resales.

          SECTION 4.          SHELF REGISTRATION

               (a)  Shelf Registration.  If (i) the Company and the
                    ------------------
          Guarantors are not required to file an Exchange Offer
          Registration Statement or permitted to Consummate the Exchange
          Offer because the Exchange Offer is not permitted by applicable
          law or Commission policy (after the procedures set forth in
          Section 6(a) below have been complied with) or (ii) any Holder of
          Transfer Restricted Securities notifies the Company prior to the
          20th day following the Consummation of the Exchange Offer (A)
          that such Holder is prohibited by applicable law or Commission
          policy from participating in the Exchange Offer, or (B) that such
          Holder may not resell the Series B Notes acquired by it in the
          Exchange Offer to the public without delivering a prospectus and
          that the Prospectus contained in the Exchange Offer Registration
          Statement is not available for such resales by such Holder, then
          the Company and the Guarantors shall use their reasonable best
          efforts to:

                    (x)  cause to be filed a shelf registration statement
               pursuant to Rule 415 under the Act, which may be an
               amendment to the Exchange Offer Registration Statement (in
               either event, the "Shelf Registration Statement") on or
                                  ----------------------------
               prior to the earliest to occur of (1) the 60th day after the
               date on which the Company determines that it is not required
               to file the Exchange Offer Registration Statement and (2)
               the 60th day after the date on which the Company receives
               notice from a Holder of Transfer Restricted Securities as
               contemplated by clause (ii) above (such earliest date being
               the "Shelf Filing Deadline"), which Shelf Registration
                    ---------------------
               Statement shall provide for resales of all Transfer
               Restricted Securities the Holders of which shall have
               provided the information required pursuant to Section 4(b)
               hereof; and

                    (y)  cause such Shelf Registration Statement to be
               declared effective by the Commission on or before the 120th
               day after the Shelf Filing Deadline.  

          The Company and the Guarantors shall use their reasonable best
          efforts to keep such Shelf Registration Statement continuously
          effective, supplemented and amended as required by the provisions
          of Sections 6(b) and (c) hereof to the extent necessary to ensure
          that it is available for resales of Notes by the Holders of
          Transfer Restricted Securities entitled to the benefit of this
          Section 4(a), and to ensure that it conforms with the
          requirements of this Agreement, the Act and the policies, rules
          and regulations of the Commission as announced from time to time,
          for a period of at least two years following the Closing Date or,
          if earlier, until the Shelf Registration Statement terminates
          when all Transfer Restricted Securities covered by such Shelf
          Registration Statement have been sold.

               (b)  Provision by Holders of Certain Information in
                    ----------------------------------------------
          Connection with the Shelf Registration Statement.  No Holder of
          ------------------------------------------------
          Transfer Restricted Securities may include any of its Transfer
          Restricted Securities in any Shelf Registration Statement
          pursuant to this Agreement unless and until such Holder furnishes
          to the Company in writing, within 20 business days after receipt
          of a request therefor, such information as the Company may
          reasonably request for use in connection with any Shelf
          Registration Statement or Prospectus or preliminary Prospectus
          included therein.  No Holder of Transfer Restricted Securities
          shall be entitled to Liquidated Damages pursuant to Section 5
          hereof if such Holder shall have failed to provide all such
          reasonably requested information within such 20-day period.  Each
          Holder as to which any Shelf Registration Statement is being
          effected agrees to furnish promptly to the Company all
          information required to be disclosed in order to make the
          information previously furnished to the Company by such Holder
          not materially misleading.

          SECTION 5.          LIQUIDATED DAMAGES

               If (i) any of the Registration Statements required by this
          Agreement to be filed is not filed with the Commission on or
          prior to the date specified for such filing in this Agreement,
          (ii) any of such Registration Statements has not been declared
          effective by the Commission on or prior to the date specified for
          such effectiveness in this Agreement (the "Effectiveness Target
                                                     --------------------
          Date"), whether or not the Company and the Guarantors have 
          -----
          breached any obligations to use their reasonable best efforts to
          cause any such Registration Statement to be declared effective,
          (iii) the Exchange Offer has not been Consummated within 180 days
          of the Closing Date with respect to the Exchange Offer
          Registration Statement or (iv) any Registration Statement
          required by this Agreement is filed and declared effective but
          shall thereafter cease to be effective or fail to be usable for
          its intended purpose without being succeeded immediately by a
          post-effective amendment to such Registration Statement that
          cures such failure and that is itself declared effective on or
          prior to the Effectiveness Target Date (each such event referred
          to in clauses (i) through (iv), a "Registration Default"), the 
                                             --------------------
          Company and the Guarantors hereby jointly and severally agree to
          pay liquidated damages to each Holder of Transfer Restricted
          Securities with respect to the first 90-day period immediately
          following the occurrence of such Registration Default in an
          amount equal to $.05 per week per $1,000 principal amount of
          Transfer Restricted Securities held by such Holder for each week
          or portion thereof that the Registration Default continues.  The
          amount of the liquidated damages shall increase by an additional
          $.05 per week per $1,000 in principal amount of Transfer
          Restricted Securities with respect to each subsequent 90-day
          period until all Registration Defaults have been cured, up to a
          maximum amount of liquidated damages of $.20 per week per $1,000
          principal amount of Transfer Restricted Securities.  All accrued
          liquidated damages shall be paid to Record Holders by the Company
          on each Damages Payment Date following the accrual thereof, in
          the same manner as provided in the Indenture and the Notes for
          the payment of interest on the Notes.  Following the cure of all
          Registration Defaults relating to any particular Transfer
          Restricted Securities, the accrual of liquidated damages with
          respect to such Transfer Restricted Securities will cease.

               All obligations of the Company and the Guarantors set forth
          in the preceding paragraph that are outstanding with respect to
          any Transfer Restricted Security at the time such security ceases
          to be a Transfer Restricted Security shall survive until such
          time as all such obligations with respect to such security shall
          have been satisfied in full.

          SECTION 6.          REGISTRATION PROCEDURES

               (a)  Exchange Offer Registration Statement.  In connection 
                    -------------------------------------
          with the Exchange Offer, the Company and the Guarantors shall
          comply with all of the provisions of Section 6(c) below, shall
          use their reasonable best efforts to effect such exchange to
          permit the sale of Transfer Restricted Securities being sold in
          accordance with the intended method or methods of distribution
          thereof, and shall comply with all of the following provisions:

                    (i)  If in the reasonable opinion of counsel to the
               Company there is a question as to whether the Exchange Offer
               is permitted by applicable law, the Company and the
               Guarantors hereby agree to seek a no-action letter or other
               favorable decision from the Commission allowing the Company
               and the Guarantors to Consummate the Exchange Offer.  The
               Company and the Guarantors hereby agree to pursue the
               issuance of such a decision to the Commission staff level
               but shall not be required to take commercially unreasonable
               action to effect a change of Commission policy.  The Company
               and the Guarantors hereby agree, however, to (A) participate
               in telephonic conferences with the Commission staff, (B)
               deliver to the Commission staff an analysis prepared by
               counsel to the Company setting forth the legal bases, if
               any, upon which such counsel has concluded that the Exchange
               Offer should be permitted and (C) diligently pursue a
               resolution (which need not be favorable) by the Commission
               staff of such submission.

                    (ii) Each Initial Purchaser, for itself and on behalf
               of the Holders, hereby acknowledges and agrees, and each
               Holder by its purchase of Transfer Restricted Securities
               shall be deemed to have acknowledged and agreed, that any
               Broker-Dealer and any such Holder using the Exchange Offer
               to participate in a distribution of the securities to be
               acquired in the Exchange Offer (1) could not under
               Commission policy as in effect on the date of this Agreement
               rely on the position of the Commission enunciated in Morgan
               Stanley and Co., Inc. (available June 5, 1991) and Exxon
               Capital Holdings Corporation (available May 13, 1988), as
               interpreted in the Commission's letter to Shearman &
               Sterling dated July 2, 1993, and similar no-action letters
               (including any no-action letter obtained pursuant to clause
               (i) above), and (2) must comply with the registration and
               prospectus delivery requirements of the Act in connection
               with a secondary resale transaction and that such a
               secondary resale transaction should be covered by an
               effective registration statement containing the selling
               security holder information required by Item 507 or 508, as
               applicable, of Regulation S-K if the resales are of Series B
               Notes obtained by such Holder in exchange for Series A Notes
               acquired by such Holder directly from the Company.

                    (iii)     Prior to effectiveness of the Exchange Offer
               Registration Statement, the Company and the Guarantors shall
               provide a supplemental letter to the Commission (A) stating
               that the Company and the Guarantors are registering the
               Exchange Offer in reliance on the position of the Commission
               enunciated in Exxon Capital Holdings Corporation (available
               May 13, 1988), Morgan Stanley and Co., Inc. (available
               June 5, 1991) and, if applicable, any no-action letter
               obtained pursuant to clause (i) above and (B) including a
               representation that neither the Company nor any Guarantor
               has entered into any arrangement or understanding with any
               Person to distribute the Series B Notes to be received in
               the Exchange Offer and that, to the best of the Company's
               information and belief, each Holder participating in the
               Exchange Offer is acquiring the Series B Notes in its
               ordinary course of business and has no arrangement or
               understanding with any Person to participate in the
               distribution of the Series B Notes received in the Exchange
               Offer.

               (b)  Shelf Registration Statement.  In connection with the
                    ----------------------------
          Shelf Registration Statement, if required, the Company and the
          Guarantors shall comply with all the provisions of Section 6(c)
          below and shall use their reasonable best efforts to effect such
          registration to permit the sale of the Transfer Restricted
          Securities being sold in accordance with the intended method or
          methods of distribution thereof and, pursuant thereto, the
          Company and the Guarantors will prepare and file with the
          Commission in accordance with Section 4(a) hereof a Shelf
          Registration Statement relating to the registration on any
          appropriate form under the Act, which form shall be available for
          the sale of the Transfer Restricted Securities in accordance with
          the intended method or methods of distribution thereof. 

               (c)  General Provisions.  In connection with any
                    ------------------
          Registration Statement and any Prospectus required by this
          Agreement to permit the sale or resale of Transfer Restricted
          Securities (including, without limitation, any Registration
          Statement and the related Prospectus required to permit resales
          of Notes by Broker-Dealers), the Company and the Guarantors
          shall:

                    (i)  use their reasonable best efforts to keep such
               Registration Statement continuously effective and provide
               all requisite financial statements (including, if required
               by the Act or any regulation thereunder, financial
               statements of the Guarantors) for the period specified in
               Section 3 or 4 of this Agreement, as applicable; upon the
               occurrence of any event that would cause any such
               Registration Statement or the Prospectus contained therein
               (A) to contain a material misstatement or omission or (B)
               not to be effective and usable for the resale of Transfer
               Restricted Securities during the period required by this
               Agreement, the Company and the Guarantors shall file
               promptly an appropriate amendment to such Registration
               Statement, in the case of clause (A), correcting any such
               misstatement or omission, and, in the case of either clause
               (A) or (B), use their reasonable best efforts to cause such
               amendment to be declared effective and such Registration
               Statement and the related Prospectus to become usable for
               their intended purpose(s) as soon as practicable thereafter;

                    (ii) prepare and file with the Commission such
               amendments and post-effective amendments to the Registration
               Statement as may be necessary to keep the Registration
               Statement effective for the applicable period set forth in
               Section 3 or 4 hereof, as applicable, or such shorter period
               as will terminate when all Transfer Restricted Securities
               covered by such Registration Statement have been sold; cause
               the Prospectus to be supplemented by any required Prospectus
               supplement, and as so supplemented to be filed pursuant to
               Rule 424 under the Act, and to comply fully with the
               applicable provisions of Rules 424 and 430A under the Act in
               a timely manner; and comply with the provisions of the Act
               with respect to the disposition of all securities covered by
               such Registration Statement during the applicable period in
               accordance with the intended method or methods of
               distribution by the sellers thereof set forth in such
               Registration Statement or supplement to the Prospectus;

                    (iii)     advise the underwriter(s), if any, and
               selling Holders promptly and, if requested by any such
               Person, to confirm such advice in writing, (A) when the
               Prospectus or any Prospectus supplement or post-effective
               amendment has been filed, and, with respect to any
               Registration Statement or any post-effective amendment
               thereto, when the same has become effective, (B) of any
               request by the Commission for amendments to the Registration
               Statement or amendments or supplements to the Prospectus or
               for additional information relating thereto, (C) of the
               issuance by the Commission of any stop order suspending the
               effectiveness of the Registration Statement under the Act or
               of the suspension by any state securities commission of the
               qualification of the Transfer Restricted Securities for
               offering or sale in any jurisdiction, or the initiation of
               any proceeding for any of the preceding purposes, (D) of the
               existence of any fact or the happening of any event that
               makes any statement of a material fact made in the
               Registration Statement, the Prospectus, any amendment or
               supplement thereto, or any document incorporated by
               reference therein untrue, or that requires the making of any
               additions to or changes in the Registration Statement or the
               Prospectus in order to make the statements therein not
               misleading.  If at any time the Commission shall issue any
               stop order suspending the effectiveness of the Registration
               Statement, or any state securities commission or other
               regulatory authority shall issue an order suspending the
               qualification or exemption from qualification of the
               Transfer Restricted Securities under state securities or
               Blue Sky laws, the Company and the Guarantors shall use
               their reasonable best efforts to obtain the withdrawal or
               lifting of such order at the earliest possible time;

                    (iv) furnish to each of the selling Holders and each of
               the underwriter(s), if any, before filing with the
               Commission, copies of any Registration Statement or any
               Prospectus included therein or any amendments or supplements
               to any such Registration Statement or Prospectus (but
               excluding any documents incorporated by reference as a
               result of the Company's periodic reporting requirements
               under the Exchange Act), and neither the Company nor any
               Guarantors shall file any such Registration Statement or
               Prospectus or any amendment or supplement to any such
               Registration Statement or Prospectus (excluding all such
               documents incorporated by reference as a result of the
               Company's periodic reporting requirements under the Exchange
               Act) to which a selling Holder of Transfer Restricted
               Securities covered by such Registration Statement or the
               underwriter(s), if any, shall reasonably object within five
               business days after the receipt thereof.  A selling Holder
               or underwriter, if any, shall be deemed to have reasonably
               objected to such filing if such Registration Statement,
               amendment, Prospectus or supplement, as applicable, as
               proposed to be filed, contains a material misstatement or
               omission;

                    (v)  promptly following the filing of any document that
               is to be incorporated by reference into a Registration
               Statement or Prospectus, provide copies of such document to
               the selling Holders and to the underwriter(s), if any, make
               the Company's representatives available for discussion of
               such document and other customary due diligence matters, and
               include such information in such document prior to the
               filing thereof as such selling Holders or underwriter(s), if
               any, reasonably may request;

                    (vi) make available at reasonable times for inspection
               by the selling Holders, any underwriter participating in any
               disposition pursuant to such Registration Statement, and any
               attorney or accountant retained by such selling Holders or
               any of the underwriter(s), all relevant financial and other
               records, pertinent corporate documents and properties of the
               Company and the Guarantors and cause the Company's and the
               Guarantors' officers, directors and employees to supply all
               information reasonably requested by any such Holder,
               underwriter, attorney or accountant in connection with such
               Registration Statement subsequent to the filing thereof and
               prior to its effectiveness; provided, however, that the
               foregoing inspection  and information gathering (i) shall be
               coordinated on behalf of the selling Holders, underwriters,
               or any representative thereof, by one counsel, who shall be
               Vinson & Elkins L.L.P. or such other counsel as may be
               chosen by the Holders of a majority in principal amount of
               Transfer Restricted Securities, and (ii) shall not be
               available for any such Holder who does not agree in writing
               to hold such information in confidence.

                    (vii)     if requested by any selling Holders or the
               underwriter(s), if any, promptly incorporate in any
               Registration Statement or Prospectus, pursuant to a
               supplement or post-effective amendment if necessary, such
               information as such selling Holders and underwriter(s), if
               any, may reasonably request to have included therein,
               including, without limitation, information relating to the
               "Plan of Distribution" of the Transfer Restricted
               Securities, information with respect to the principal amount
               of Transfer Restricted Securities being sold to such
               underwriter(s), the purchase price being paid therefor and
               any other terms of the offering of the Transfer Restricted
               Securities to be sold in such offering; and make all
               required filings of such Prospectus supplement or
               post-effective amendment as soon as practicable after the
               Company is notified of the matters to be incorporated in
               such Prospectus supplement or post-effective amendment;

                    (viii)    furnish to each selling Holder and each of
               the underwriter(s), if any, without charge, at least one
               copy of the Registration Statement, as first filed with the
               Commission, and of each amendment thereto, including all
               documents incorporated by reference therein and all exhibits
               (including exhibits incorporated therein by reference);

                    (ix) deliver to each selling Holder and each of the
               underwriter(s), if any, without charge, as many copies of
               the Prospectus (including each preliminary prospectus) and
               any amendment or supplement thereto as such Persons
               reasonably may request; the Company and the Guarantors
               hereby consent to the use of the Prospectus and any
               amendment or supplement thereto by each of the selling
               Holders and each of the underwriter(s), if any, in
               connection with the offering and the sale of the Transfer
               Restricted Securities covered by the Prospectus or any
               amendment or supplement thereto; provided that such use of
               the Prospectus and any amendment or supplement thereto and
               such offering and sale conforms to the Plan of Distribution
               set forth in the Prospectus and complies with the terms of
               this Agreement and all applicable laws and regulations
               thereunder;

                    (x)  in the event of an Underwritten Registration,
               enter into such customary agreements (including an
               underwriting agreement), make such customary representations
               and warranties, deliver such customary documents and
               certificates, and take all such other customary actions in
               connection therewith in order to expedite or facilitate the
               disposition of the Transfer Restricted Securities pursuant
               to any Shelf Registration Statement contemplated by this
               Agreement, all to such extent as may be reasonably requested
               by any Holder of Transfer Restricted Securities or
               underwriter in connection with any sale or resale pursuant
               to any Shelf Registration Statement contemplated by this
               Agreement; and, without limiting the generality of the
               foregoing, the Company and the Guarantors shall:

                         (A)  furnish to each underwriter upon the
                    effectiveness of the Shelf Registration Statement: 

                              (1)  a certificate, dated the date of
                         effectiveness of the Shelf Registration Statement, 
                         signed on behalf of the Company by two senior
                         officers, one of whom must be its Chief Financial
                         Officer, confirming, as of such date, the matters
                         set forth in paragraphs (a), (c) and (d) of
                         Section 8 of the Purchase Agreement with respect
                         to the transactions contemplated by the Shelf
                         Registration Statement;

                              (2)  an opinion, dated the date of
                         effectiveness of the Shelf Registration Statement,
                         of counsel for the Company and the Guarantors,
                         covering the matters set forth in Section 8(f) of
                         the Purchase Agreement with respect to the
                         transactions contemplated by the Shelf
                         Registration Statement, and in any event including
                         a statement to the effect that such counsel has
                         participated in conferences with officers and
                         other representatives of the Company and the
                         Guarantors, representatives of the independent
                         accountants of the Company and the Guarantors and
                         representatives of the Initial Purchaser at which
                         the contents of the Registration Statement and
                         related matters were discussed and, although it
                         does not assume any responsibility for the
                         accuracy, completeness or fairness of the
                         statements contained in the Registration Statement
                         during the course of such participation, no facts
                         came to its attention that caused such counsel to
                         believe that the Registration Statement, at the
                         time such Registration Statement or any
                         post-effective amendment thereto became effective,
                         contained any untrue statement of a material fact
                         or omitted to state any fact required to be stated
                         therein or necessary to make the statements
                         therein not misleading, or that the Prospectus
                         contained in such Registration Statement as of its
                         date contained an untrue statement of a material
                         fact or omitted to state a material fact necessary
                         in order to make the statements therein, in the
                         light of the circumstances under which they were
                         made, not misleading (except as to financial
                         statements and related notes, the financial
                         statement schedules and other financial and
                         statistical data included therein); and
           
                              (3)  a customary comfort letter, dated as of
                         the date of effectiveness of the Shelf
                         Registration Statement, from the Company's
                         independent accountants if such comfort letter
                         shall be issuable to the underwriters in
                         accordance with the relevant accounting industry
                         pronouncements, in the customary form and covering
                         matters of the type customarily covered in comfort
                         letters by underwriters in connection with primary
                         underwritten offerings, and affirming the matters
                         set forth in the comfort letters delivered
                         pursuant to Section 8(g) of the Purchase
                         Agreement, without exception; and

                         (B)  deliver such other documents and certificates
                    as may be reasonably requested by such parties to
                    evidence compliance with clause (A) above.

               If at any time the representations and warranties of the
               Company and the Guarantors contemplated in clause (A)(1)
               above cease to be true and correct, the Company shall so
               advise the Initial Purchasers and the underwriter(s), if
               any, and each selling Holder promptly and, if requested by
               any such Person, shall confirm such advice in writing;

                    (xi) prior to any public offering of Transfer
               Restricted Securities, cooperate with the selling Holders,
               the underwriter(s), if any, and their respective counsel in
               connection with the registration and qualification of the
               Transfer Restricted Securities under the securities or Blue
               Sky laws of such jurisdictions as the selling Holders or
               underwriter(s) may request and do any and all other acts or
               things reasonably necessary or advisable to enable the
               disposition in such jurisdictions of the Transfer Restricted
               Securities covered by the Shelf Registration Statement;
               provided, however, that neither the Company nor the
               Guarantors shall be required to register or qualify as a
               foreign corporation where it is not now so qualified or to
               take any action that would subject it to the service of
               process in suits or to taxation, other than as to matters
               and transactions relating to the Registration Statement, in
               any jurisdiction where it is not now so subject;

                    (xii)     issue, upon the request of any Holder of
               Series A Notes covered by the Shelf Registration Statement,
               Series B Notes, having an aggregate principal amount equal
               to the aggregate principal amount of Series A Notes being
               sold by such Holder; such Series B Notes to be registered in
               the name of the purchaser(s) of such Notes, as the case may
               be; in return, the Series A Notes held by such Holder shall
               be surrendered to the Company for cancellation;

                    (xiii)    cooperate with the selling Holders and the
               underwriter(s), if any, to facilitate the timely preparation
               and delivery of certificates representing Transfer
               Restricted Securities to be sold and not bearing any
               restrictive legends; and enable such Transfer Restricted
               Securities to be in such authorized denominations and
               registered in such names as the Holders or the
               underwriter(s), if any, may reasonably request at least two
               business days prior to any sale of Transfer Restricted
               Securities made by such underwriter(s);

                    (xiv)     if any fact or event contemplated by clause
               (c)(iii)(D) above shall exist or have occurred, prepare a
               supplement or post-effective amendment to the Registration
               Statement or related Prospectus or any document incorporated
               therein by reference or file any other required document so
               that, as thereafter delivered to the purchasers of Transfer
               Restricted Securities, the Prospectus will not contain any
               untrue statement of a material fact or omit to state any
               material fact necessary to make the statements therein not
               misleading;

                    (xv) provide a CUSIP number for all Series B Notes not
               later than the effective date of the Registration Statement
               and provide the Trustee under the Indenture with one or more
               global certificates for the Series B Notes that are in a
               form eligible for deposit with The Depository Trust Company;

                    (xvi)     cooperate and assist in any filings required
               to be made with the NASD and in the performance of any due
               diligence investigation by any underwriter (including any
               "qualified independent underwriter") that is required to be
               retained in accordance with the rules and regulations of the
               NASD;

                    (xvii)    otherwise use their reasonable best efforts
               to comply with all applicable rules and regulations of the
               Commission, and make generally available to its security
               holders, as soon as practicable, a consolidated earnings
               statement meeting the requirements of Rule 158 (which need
               not be audited) for the twelve-month period (A) commencing
               at the end of any fiscal quarter in which Transfer
               Restricted Securities are sold to underwriters in a firm or
               best efforts Underwritten Offering or (B) if not sold to
               underwriters in such an offering, beginning with the first
               month of the Company's first fiscal quarter commencing after
               the effective date of the Registration Statement;

                    (xviii)   cause the Indenture to be qualified under the
               TIA not later than the effective date of the first
               Registration Statement required by this Agreement, and, in
               connection therewith, cooperate with the Trustee and the
               Holders of Notes to effect such changes to the Indenture as
               may be required for such Indenture to be so qualified in
               accordance with the terms of the TIA; and execute and use
               their reasonable best efforts to cause the Trustee to
               execute, all documents that may be required to effect such
               changes and all other forms and documents required to be
               filed with the Commission to enable such Indenture to be so
               qualified in a timely manner; and

                    (xix)     provide promptly to each Holder upon request
               each document filed with the Commission pursuant to the
               requirements of Section 13 or Section 15 of the Exchange
               Act.

                    Each Holder agrees by acquisition of a Transfer
          Restricted Security that, upon receipt of any notice from the
          Company of the existence of any fact of the kind described in
          Section 6(c)(iii)(D) hereof, such Holder will keep such notice
          confidential and forthwith discontinue disposition of Transfer
          Restricted Securities pursuant to the applicable Registration
          Statement until such Holder's receipt of the copies of the
          supplemented or amended Prospectus contemplated by Section
          6(c)(xiv) hereof, or until it is advised in writing (the
          "Advice") by the Company that the use of the Prospectus may be
           ------
          resumed, and has received copies of any additional or
          supplemental filings that are incorporated by reference in the
          Prospectus.  If so directed by the Company, each Holder will
          deliver to the Company (at the Company's expense) all copies,
          other than permanent file copies then in such Holder's
          possession, of the Prospectus covering such Transfer Restricted
          Securities that was current at the time of receipt of such
          notice.  In the event the Company shall give any such notice, the
          time period regarding the effectiveness of such Registration
          Statement set forth in Section 3 or 4 hereof, as applicable,
          shall be extended by the number of days during the period from
          and including the date of the giving of such notice pursuant to
          Section 6(c)(iii)(D) hereof to and including the date when each
          selling Holder covered by such Registration Statement shall have
          received the copies of the supplemented or amended Prospectus
          contemplated by Section 6(c)(xiv) hereof or shall have received
          the Advice.

          SECTION 7.          REGISTRATION EXPENSES

               (a)  All expenses incident to the Company's or the
          Guarantors' performance of or compliance with this Agreement will
          be borne by the Company and the Guarantors, regardless of whether
          a Registration Statement becomes effective, including without
          limitation: (i) all registration and filing fees and expenses
          (including filings made by the Initial Purchasers or Holders with
          the NASD (and, if applicable, the fees and expenses of any
          "qualified independent underwriter" and its counsel that may be
          required by the rules and regulations of the NASD)); (ii) all
          fees and expenses of compliance with federal securities and state
          Blue Sky or securities laws; (iii) all expenses of printing
          (including printing of Prospectuses), messenger and delivery
          services and telephone; (iv) all fees and disbursements of
          counsel for the Company and the Guarantors and, subject to
          Section 7(b) below, counsel for the Holders of Transfer
          Restricted Securities; (v) all application and filing fees in
          connection with listing Notes on a national securities exchange
          or automated quotation system, if any; and (vi) all fees and
          disbursements of independent public accountants of the Company
          and the Guarantors (including the expenses of any special audit
          and comfort letters required by or incident to such performance).

                    The Company and the Guarantors will, in any event, bear
          their internal expenses (including, without limitation, all
          salaries and expenses of its officers and employees performing
          legal or accounting duties), the expenses of any annual audit and
          the fees and expenses of any Person, including special experts,
          retained by the Company or any Guarantor.  The Company shall not
          be responsible for any other expenses or costs, including but not
          limited to commissions, fees and discounts of underwriters,
          brokers, dealers and agents.

               (b)  In connection with any Registration Statement required
          by this Agreement (excluding the Exchange Offer Registration
          Statement), the Company and the Guarantors will reimburse the
          Initial Purchasers and the Holders of Transfer Restricted
          Securities being tendered in the Exchange Offer and/or resold
          pursuant to the "Plan of Distribution" contained in the Exchange
          Offer Registration Statement or registered pursuant to the Shelf
          Registration Statement, as applicable, for the reasonable fees
          and disbursements of not more than one counsel, who shall be
          Vinson & Elkins L.L.P. or such other counsel as may be chosen by
          the Holders of a majority in principal amount of the Transfer
          Restricted Securities for whose benefit such Registration
          Statement is being prepared.

          SECTION 8.          INDEMNIFICATION

               (a)  The Company and the Guarantors, jointly and severally,
          agree to indemnify and hold harmless (i) each Holder, (ii) each
          Initial Purchaser, (iii) each person, if any, who controls any
          Holder or an Initial Purchaser within the meaning of Section 15
          of the Act or Section 20(a) of the Exchange Act and (iii) the
          respective officers, directors, partners, employees,
          representatives and agents of any Holder or Initial Purchaser or
          any controlling person (any person referred to in clauses (i),
          (ii) or (iii) may hereinafter be referred to as an "Indemnified
                                                              -----------
          Holder"), to the fullest extent lawful, from and against any and
          ------
          all losses, liabilities, claims, damages and expenses whatsoever
          (including but not limited to reasonable attorneys' fees and any
          and all reasonable expenses whatsoever incurred in investigating,
          preparing or defending against any investigation or litigation,
          commenced or threatened, or any claim whatsoever, and any and all
          amounts paid in settlement of any claim or litigation), joint or
          several, to which they or any of them may become subject under
          the Act, the Exchange Act or otherwise, insofar as such losses,
          liabilities, claims, damages or expenses (or actions in respect
          thereof) arise out of or are based upon any untrue statement or
          alleged untrue statement of a material fact contained in any
          Registration Statement or Prospectus, or in any supplement
          thereto or amendment thereof, or arise out of or are based upon
          the omission or alleged omission to state therein a material fact
          required to be stated therein or necessary to make the statements
          therein, in the light of the circumstances under which they were
          made, not misleading; provided, however, that the Company and the
          Guarantors will not be liable in any such case to the extent, but
          only to the extent, that any such loss, liability, claim, damage
          or expense arises out of or is based upon any such untrue
          statement or alleged untrue statement or omission or alleged
          omission made therein in reliance upon and in conformity with
          written information furnished to the Company by or on behalf of
          the any of the Holders expressly for use therein.  This indemnity
          agreement will be in addition to any liability that the Company
          and the Guarantors may otherwise have, including under this
          Agreement.

               (b)  Each Holder of Transfer Restricted Securities agrees,
          severally and not jointly, to indemnify and hold harmless the
          Company, each of the Guarantors and each person, if any, who
          controls the Company or any Guarantor within the meaning of
          Section 15 of the Act or Section 20(a) of the Exchange Act and
          each of their respective officers, directors, employers,
          partners, representatives and agents to the same extent as the
          foregoing indemnity from the Company and the Guarantors to each
          of the Indemnified Holders, but only with respect to information
          relating to such Holder furnished in writing by such Holder for
          use in any Registration Statement, or in any amendment thereof or
          supplement thereto; provided, however, that in no case shall any
          selling Holder be liable or responsible for any amount in excess
          of proceeds received by such Holder upon the sale of the Notes
          giving rise to such indemnification obligation.  This indemnity
          will be in addition to any liability that the Holders may
          otherwise have, including under this Agreement.

               (c)  Promptly after receipt by an indemnified party under
          subsection (a) or (b) above of notice of the commencement of any
          action, such indemnified party shall, if a claim in respect
          thereof is to be made against the indemnifying party under such
          subsection, notify each party against whom indemnification is to
          be sought in writing of the commencement thereof (but the failure
          so to notify an indemnifying party shall not relieve it from any
          liability that it may have under this Section 8 or otherwise
          except to the extent that it has been prejudiced in any material
          respect by such failure).  In case any such action is brought
          against any indemnified party, and it notifies an indemnifying
          party of the commencement thereof, the indemnifying party will be
          entitled to participate therein, and to the extent it may elect
          by written notice delivered to the indemnified party promptly
          after receiving the aforesaid notice from such indemnified party,
          to assume and control the defense thereof with counsel reasonably
          satisfactory to such indemnified party.  Notwithstanding the
          foregoing, the indemnified party or parties shall have the right
          to employ its or their own counsel in any such case, but the fees
          and expenses of such counsel shall be at the expense of such
          indemnified party or parties unless (i) the employment of such
          counsel shall have been authorized in writing by the indemnifying
          parties in connection with the defense of such action, (ii) the
          indemnifying parties shall not have employed counsel to take
          charge of the defense of such action within a reasonable time
          after notice of commencement of the action, or (iii) such
          indemnified party or parties shall have reasonably concluded that
          there may be defenses available to it that are different from or
          additional to those available to one or all of the indemnifying
          parties (in which case the indemnifying party shall not have the
          right to direct the defense of such action on behalf of the
          indemnified party or parties), in any of which events such fees
          and expenses of counsel shall be borne by the indemnifying
          parties; provided, however, that the indemnifying party under
          subsection (a) or (b) above shall only be liable for the legal
          expenses of one counsel (in addition to any local counsel) for
          all indemnified parties.  Anything in this subsection to the
          contrary notwithstanding, an indemnifying party shall not be
          liable for any settlement of any claim or action effected without
          its prior written consent; provided that such consent was not
          unreasonably withheld.

          SECTION 9.          CONTRIBUTION

               In order to provide for contribution in circumstances in
          which the indemnification provided for in Section 8 is for any
          reason held to be unavailable or is insufficient to hold harmless
          a party indemnified thereunder, the Company and the Guarantors,
          on the one hand, and the Holders on the other hand, shall
          contribute to the aggregate losses, claims, damages, liabilities
          and expenses of the nature contemplated by such indemnification
          provision (including any investigation, legal and other expenses
          incurred in connection with, and any amount paid in settlement
          of, any action, suit or proceeding or any claims asserted, but
          after deducting in the case of losses, claims, damages,
          liabilities and expenses suffered by the Company and the
          Guarantors, any contribution received by the Company and the
          Guarantors from Persons, other than a Holder, who may also be
          liable for contribution, including persons who control the
          Company and the Guarantors within the meaning of Section 15 of
          the Act or Section 20(a) of the Exchange Act) to which the
          Company, the Guarantors or any Holder may be subject, (i) in such
          proportion as is appropriate to reflect the relative fault of the
          Company and the Guarantors, on one hand, and each Holder, on the
          other hand, in connection with the statements or omissions that
          resulted in such losses, claims, damages, liabilities or
          expenses, or (ii) if the allocation provided by clause (i) is not
          permitted by applicable law, in such proportion as is appropriate
          to reflect not only the relative fault referred to in clause (i)
          above but also other relevant equitable considerations.  The
          relative fault of the Company and the Guarantors, on one hand,
          and of each Holder, on the other hand, shall be determined by
          reference to, among other things, whether the untrue or alleged
          untrue statement of a material fact or the omission or alleged
          omission to state a material fact relates to information supplied
          by the Company, the Guarantors or such Holder and the parties'
          relative intent, knowledge, access to information and opportunity
          to correct or prevent such statement or omission.  The Company,
          the Guarantors and each Holder of Transfer Restricted Securities
          agree that it would not be just and equitable if contribution
          pursuant to this Section 9 were determined by pro rata allocation
          or by any other method of allocation that does not take into
          account the equitable considerations referred to above. 
          Notwithstanding the provisions of this Section 9, (i) in no case
          shall any Holder be required to contribute any amount in excess
          of the amount by which the proceeds received by such Holder upon
          the sale of the Transfer Restricted Securities giving rise to
          such obligation exceeds the amount of any damages that such
          Holder has otherwise been required to pay by reason of any untrue
          or alleged untrue statement or omission or alleged omission and
          (ii) no person guilty of fraudulent misrepresentation (within the
          meaning of Section 11(f) of the Act) shall be entitled to
          contribution from any Person who was not guilty of such
          fraudulent misrepresentation.  For purposes of this Section 9,
          (A) each Person, if any, who controls any of the Holders within
          the meaning of Section 15 of the Act or Section 20(a) of the
          Exchange Act and (B) the respective officers, directors,
          partners, employees, representatives and agents of such Holder or
          any controlling Person shall have the same rights to contribution
          as the Holders, and each Person, if any, who controls the Company
          or any Guarantor within the meaning of Section 15 of the Act or
          Section 20(a) of the Exchange Act shall have the same rights to
          contribution as the Company and the Guarantors, subject in each
          case to clauses (i) and (ii) of this Section 9.  Any party
          entitled to contribution will, promptly after receipt of notice
          of commencement of any action, suit or proceeding against such
          party in respect of which a claim for contribution may be made
          against another party or parties under this Section 9, notify
          such party or parties from whom contribution may be sought, but
          the failure to so notify such party or parties shall not relieve
          the party or parties from whom contribution may be sought from
          any obligation it or they may have under this Section 9 or
          otherwise, except to the extent it or they have been prejudiced
          in any material respect by such failure.  No party shall be
          liable for contribution with respect to any action or claim
          settled without its prior written consent; provided that such
          written consent was not unreasonably withheld.

          SECTION 10.    RULE 144A

               The Company and the Guarantors hereby agree with each
          Holder, for so long as any Transfer Restricted Securities remain
          outstanding, to make available to any Holder or beneficial owner
          of Transfer Restricted Securities in connection with any sale
          thereof and any prospective purchaser of such Transfer Restricted
          Securities from such Holder or beneficial owner, the information
          required by Rule 144A(d)(4) under the Act in order to permit
          resales of such Transfer Restricted Securities pursuant to Rule
          144A.

          SECTION 11.    PARTICIPATION IN UNDERWRITTEN REGISTRATIONS

               No Holder may participate in any Underwritten Registration
          hereunder unless such Holder (a) agrees to sell such Holder's
          Transfer Restricted Securities on the basis provided in any
          underwriting arrangements approved by the Persons entitled
          hereunder to approve such arrangements and (b) completes and
          executes all reasonable questionnaires, powers of attorney,
          indemnities, underwriting agreements, lock-up letters and other
          documents required under the terms of such underwriting
          arrangements.

          SECTION 12.    SELECTION OF UNDERWRITERS

               The Holders of Transfer Restricted Securities covered by the
          Shelf Registration Statement who desire to do so may sell such
          Transfer Restricted Securities in an Underwritten Offering.  In
          any such Underwritten Offering, the investment banker or
          investment bankers and manager or managers that will administer
          the offering will be selected by the Holders of a majority in
          aggregate principal amount of the Transfer Restricted Securities
          included in such offering; provided, however, that such
          investment bankers and managers must be reasonably satisfactory
          to the Company.

          SECTION 13.    MISCELLANEOUS

               (a)  [Intentionally omitted.]

               (b)  No Inconsistent Agreements.  The Company and the
                    --------------------------
          Guarantors shall not, on or after the date of this Agreement,
          enter into any agreement with respect to its securities that is
          inconsistent with the rights granted to the Holders in this
          Agreement or otherwise conflicts with the provisions hereof.  The
          rights granted to the Holders hereunder do not in any way
          conflict with and are not inconsistent with the rights granted to
          the holders of the Company's or any Guarantor's securities under
          any agreement in effect on the date hereof.

               (c)  Adjustments Affecting the Notes.  The Company and the 
                    -------------------------------
          Guarantors shall not take any action with respect to the Notes
          that would materially and adversely affect the ability of the
          Holders to Consummate the Exchange Offer.

               (d)  Amendments and Waivers.  The provisions of this
                    ----------------------
          Agreement may not be amended, modified or supplemented, and
          waivers or consents to or departures from the provisions hereof
          may not be given unless the Company has obtained the written
          consent of Holders of a majority of the outstanding principal
          amount of Transfer Restricted Securities.  Notwithstanding the
          foregoing, a waiver or consent to departure from the provisions
          hereof that relates exclusively to the rights of Holders whose
          securities are being tendered pursuant to the Exchange Offer and
          that does not affect directly or indirectly the rights of other
          Holders whose securities are not being tendered pursuant to such
          Exchange Offer may be given by the Holders of a majority of the
          outstanding principal amount of Transfer Restricted Securities
          being tendered.

               (e)  Notices.  All notices and other communications provided
                    -------
          for or permitted hereunder shall be made in writing by hand-
          delivery, first-class mail (registered or certified, return
          receipt requested), telecopier, or air courier guaranteeing
          overnight delivery:

                    (i)  if to a Holder, at the address set forth on the
               records of the Registrar under the Indenture, with a copy to
               the Registrar under the Indenture; and

                    (ii) if to the Company or any Guarantor:

                              American Eco Corporation
                              11011 Jones Road
                              Houston, Texas 77070
                              Telecopier No.: (281) 774-7006
                              Attention:  Chief Administrative Officer

                         with a copy to:

                              Reid & Priest LLP
                              40 West 57th Street
                              New York, New York 10019

                              Telecopier No.:  (212) 603-2001
                              Attention:  Bruce A. Rich

               All such notices and communications shall be deemed to have
          been duly given:  at the time delivered by hand, if personally
          delivered; five business days after being deposited in the mail,
          postage prepaid, if mailed; when receipt acknowledged, if
          telecopied; and on the next business day, if timely delivered to
          an air courier guaranteeing overnight delivery.

               Copies of all such notices, demands or other communications
          shall be concurrently delivered by the Person giving the same to
          the Trustee at the address specified in the Indenture.

               (f)  Successors and Assigns.  This Agreement shall inure to
                    ----------------------
          the benefit of and be binding upon the successors and assigns of
          each of the parties, including without limitation and without the
          need for an express assignment, the successors and assigns of
          subsequent Holders of Transfer Restricted Securities; provided,
          however, that this Agreement shall not inure to the benefit of or
          be binding upon a successor or assign of a Holder unless and to
          the extent such successor or assign acquired Transfer Restricted
          Securities from such Holder.

               (g)  Counterparts.  This Agreement may be executed in any
                    ------------
          number of counterparts and by the parties hereto in separate
          counterparts, each of which when so executed shall be deemed to
          be an original and all of which taken together shall constitute
          one and the same agreement.

               (h)  Headings.  The headings in this Agreement are for
                    --------
          convenience of reference only and shall not limit or otherwise
          affect the meaning hereof.

               (i)  Governing Law.  THIS AGREEMENT SHALL BE GOVERNED BY AND
                    -------------
          CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

               (j)  Severability.  In the event that any one or more of the
                    ------------
          provisions contained herein, or the application thereof in any
          circumstance, is held invalid, illegal or unenforceable, the
          validity, legality and enforceability of any such provision in
          every other respect and of the remaining provisions contained
          herein shall not be affected or impaired thereby.

          [Signature page to follow]

          
               IN WITNESS WHEREOF, the parties have executed this Agreement
          as of the date first written above.

                                   American Eco Corporation

                                   By /s/ David L. Norris
                                     -------------------------------------
                                        David L. Norris
                                        Senior Vice President and 
                                        Chief Administrative Officer


                                   The Turner Group, Inc.
                                   C.A. Turner Construction Company
                                   Action Contract Services, Inc.
                                   C.A. Turner Maintenance, Inc.

                                   H.E. Co. Services, Inc.
                                   Cambridge Construction Service Corp.
                                   Lake Charles Construction Corporation
                                   United Eco Systems, Inc.
                                   Eco Systems, Inc.
                                   MM Industra Limited
                                   Separation and Recovery Systems, Inc.
                                   Industra Service Corporation
                                   Industra Engineers & Consultants, Inc.
                                   Industra Thermal Service Corporation
                                   NUS, Inc.
                                   Industra Service Corp.
                                   Industra, Inc.
                                   Industra Thermal Service Corp.
                                   Chempower, Inc.
                                   Global Power Company
                                   Brookfield Corporation
                                   Southwick Corporation
                                   Controlled Power Limitd Partnership
                                   Specialty Management Group, Inc.
                                   Separation and Recovery Systems Limited


                                   By: /s/ David L. Norris
                                      ------------------------------------
                                        David L. Norris
                                        Vice President






          Accepted and agreed to as of
          the date first above written:

          Jefferies & Company, Inc.


          By /s/ Joe Maly
            ---------------------------
               Name: Joe Maly
               Title: Managing Director


          Nesbitt Burns Securities Inc.


          By /s/ William J. Moser, Jr.
            ---------------------------
               Name: William J. Moser, Jr.
               Title: Director