
<PAGE>   1
                                                                     Exhibit 4.3

         The Registrant agrees to furnish to the Commission upon request with a
copy of the following agreements each of which has been omitted pursuant to the
provisions of Regulation S-k, Item 601(b)(4)(iii)(A) and which defines the
rights of holders of long-term debt of a subsidiary of the Registrant the
amount of which does not exceed 10% of the total assets of the Registrant and
its subsidiaries on a consolidated basis:

         (a)      Agreement of Sale dated as of November 1, 1989, between
                  Industrial Development Authority of the County of Charles
                  City and Chambers Development of Virginia, Inc.; Guaranty
                  Agreement dated as of November 1, 1989, by and among Chambers
                  Development Company, Inc. and Sovran Bank, N.A., as Trustee.

         (b)      First Supplemental Agreement of Sale Dated March 1, 1990,
                  between Industrial Development Authority of the County of
                  Charles City and Chambers Development of Virginia, Inc.

         (c)      Loan Agreement dated November 1, 1991, between Industrial
                  Development Authority of the County of Charles City and
                  Chambers Development of Virginia, Inc.

         (d)      Loan Agreement dated December 1, 1990, between South Carolina
                  Jobs-Economic Development Authority and Chambers Oakridge
                  Landfill, Inc.

         (e)      Agreement of Sale dated as of December 1, 1991, between
                  Industrial Development Authority of Amelia County, Virginia
                  and Chambers Waste Systems of Virginia, Inc.

         (f)      Loan Agreement dated March 1, 1992, between Okeechobee
                  County, Florida and Chambers Waste Systems of Florida, Inc.

         (g)      Indenture between Allegheny County Industrial Development
                  Authority and Pittsburgh National Bank, as Trustee, and
                  agreed to by John G. Rangos, Sr., Alexander W. Rangos and
                  John G. Rangos, Jr., individuals trading as Synergy
                  Associates, dated as of November 1, 1985; and Guaranty and
                  Suretyship Agreement of William H. Martin, Inc., U.S.
                  Services Corporation, Chambers of Georgia, Inc., Chambers of
                  South Carolina, Inc., Carrier Engineering, Inc., Security
                  Bureau, Inc., Sandman Waste Management, Inc., Chambers
                  Development Company, Inc., John G. Rangos, Sr., John G.
                  Rangos, Jr. and Alexander W.  Rangos, dated as of November 1,
                  1985.
