Document:

EXHIBIT 10.23

                               FOURTH AMENDMENT TO
                                 LOAN AGREEMENT

         THIS FOURTH AMENDMENT TO LOAN AGREEMENT ("Fourth Amendment"), made and
entered into as of the 14th day of August, 2000, by and between MERCURY WASTE
SOLUTIONS, INC., a Minnesota corporation ("Borrower") and BANKERS AMERICAN
CAPITAL CORPORATION, a Minnesota corporation ("Lender");

                                    RECITALS

         A. The Borrower and Lender are parties to that certain Loan Agreement
dated as of May 8, 1998, as amended by that certain First Amendment dated May 7,
1999, as amended by that certain Second Amendment dated September 30, 1999, as
amended by that certain Third Amendment dated March 9, 2000 (the "Credit
Agreement").

         B. The Lender has requested a decrease in the total amount available
under the revolving loan to $1,500,000, and Borrower is willing to consent to
such decrease pursuant to the terms and conditions of this Fourth Amendment.

         C. The parties hereto desire to amend the terms of the Credit Agreement
upon the terms and conditions hereinafter set forth.

                                    AGREEMENT

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
set forth herein and for one dollar and other good and valuable consideration,
the receipt and sufficiency of which is hereby acknowledged, the parties hereto
hereby amend the Credit Agreement as follows:

         1. Capitalized Terms. All capitalized terms not defined herein shall
have the meanings assigned such terms in the Credit Agreement, unless otherwise
defined herein. In addition:

                  "Revolving Commitment Amount" means $1,500,000.

                  "Revolving Note" means that certain Revolving Credit
                  Promissory Note dated as of the date hereof in the principal
                  amount of $1,500,000 made payable by Borrower to the order of
                  Lender as the same may be amended, executed, renewed or
                  replaced from time to time. On the date of this Agreement, the
                  amount outstanding under the Revolving Note is $1,315,000.

         2. Conditions Precedent. Prior to the effectiveness of this Fourth
Amendment, the Borrower shall provide to the Lender as conditions precedent, the
following:

                  a.       Original counterpart of this Fourth Amendment duly
                           executed by the Borrower;

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                  b.       Original executed Revolving Note;

                  c.       Payment of all costs and expenses incurred by the
                           Lender in connection with this Fourth Amendment,
                           including without limitation, all legal fees and
                           out-of-pocket expenses of Lender's counsel; and

                  d.       Current resolutions of Borrower's board of directors
                           authorizing the Fourth Amendment.

         3. References. Any references in any document to the Credit Agreement
including, but not limited to, the Notes and other Loan Documents, are hereby
amended to refer to the Credit Agreement as amended by this Fourth Amendment.

         4. Representations and Warranties. Borrower reaffirms and confirms all
of the representations, covenants and warranties contained in Articles IV and V
of the Credit Agreement as of the date of this Fourth Amendment.

         5. Reaffirmation of Security Agreement. Borrower hereby acknowledges
and agrees that all of the obligations of Borrower under the Credit Agreement,
as amended by this Fourth Amendment, is secured by that certain Security
Agreement executed by Borrower in favor of Lender dated as of May 8, 1998.

         6. Acknowledgments. The Borrower acknowledges that it has been advised
by the counsel of its choice in the negotiation, execution and delivery of this
Fourth Amendment, that the Lender has no fiduciary relationship to or joint
venture with the Borrower, the relationship being solely that of borrower and
lender, and that the Lender does not undertake any responsibility to the
Borrower to review or inform the Borrower of any matter in connection with any
phase of the business or operations of the Borrower which shall rely entirely on
its own judgment.

         7. Costs and Expenses. Borrower agrees to pay all costs and expenses
incurred by Lender in connection with the preparation of this Fourth Amendment,
including, but not limited to, title insurance premiums and expenses, recording
fees, and the fees and expenses of legal counsel.

         8. Entire Agreement. This Fourth Amendment and the Agreement embody the
entire agreement between the parties and supersede all prior agreements and
understandings between the parties hereto.

         9. Full Force and Effect. Except as amended hereby, the provisions of
the Credit Agreement shall remain unmodified and in full force and effect.

         10. Counterparts. This Fourth Amendment may be executed in any number
of counterparts, each of which shall be an original and all of which together
shall constitute one and the same instrument.

<PAGE>

         IN WITNESS WHEREOF, the parties have caused this Fourth Amendment to be
executed as of the day and year first above written.

         BORROWER:                     MERCURY WASTE SOLUTIONS, INC.,
                                       A MINNESOTA CORPORATION

                                       BY  /S/ TODD J. ANDERSON
                                         ----------------------

                                         ITS  CFO
                                              ---

         LENDER:                       BANKERS AMERICAN CAPITAL
                                       CORPORATION, A MINNESOTA CORPORATION

                                       BY  /S/ BRAD J. BUSCHER
                                         ---------------------

                                         ITS  PRESIDENT
                                              ---------

                              CONSENT OF GUARANTOR

         The undersigned, as guarantor of all obligations of Mercury Waste
Solutions, Inc. (the "Borrower") to Bankers American Capital Corporation
("Lender") pursuant to that certain Guaranty dated May 8, 1998 executed by the
undersigned in favor of Lender, as the same may be amended from time to time
(the "Guaranty"), hereby consents to the terms of the above Fourth Amendment,
and agrees that the undersigned remains obligated to the Lender for the payment
of the indebtedness of the Borrower incurred pursuant to said agreement, as
amended, including without limitation, the indebtedness evidenced by the
Revolving Note, as defined therein.

                                       MWS NEW YORK, INC.,
                                       A MINNESOTA CORPORATION

                                       BY TODD J. ANDERSON
                                          ----------------

                                       ITS CFO
                                           ---EXHIBIT 10.24

NEITHER THIS WARRANT NOR THE SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE
HEREUNDER HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 OR UNDER THE
SECURITIES LAWS OF ANY STATE OR OTHER JURISDICTION (TOGETHER, THE "SECURITIES
LAWS") AND MAY NOT BE OFFERED FOR SALE, SOLD OR OTHERWISE TRANSFERRED OR
ENCUMBERED IN THE ABSENCE OF COMPLIANCE WITH SUCH SECURITIES LAWS AND UNTIL THE
COMPANY (AS DEFINED HEREIN) THEREOF SHALL HAVE RECEIVED AN OPINION FROM COUNSEL
ACCEPTABLE TO IT THAT THE PROPOSED DISPOSITION WILL NOT VIOLATE ANY APPLICABLE
SECURITIES LAWS.

                                                                     Warrant A-1

                          MERCURY WASTE SOLUTIONS, INC.
                               WARRANT TO PURCHASE
                                  COMMON STOCK

         For value received, Bankers American Capital Corporation, a Minnesota
corporation ("Holder"), is entitled to subscribe for and purchase from Mercury
Waste Solutions, Inc., a Minnesota corporation (the "Company"), up to SEVENTY
THOUSAND (70,000) fully paid and nonassessable shares of the Company's common
stock, $.01 par value ("Common Stock"), at the price of $1.44 per share, subject
to adjustments as noted below (the "Warrant Exercise Price").

         This Warrant may be exercised by Holder at any time after February 11,
2001 and prior to August 11, 2005.

         This Warrant is subject to the following provisions, terms and
conditions:

         1. EXERCISE. The rights represented by this Warrant may be exercised by
the Holder, in whole or in part, by written notice of exercise delivered to the
Company at least ten (10) business days prior to the intended date of exercise
and by the surrender of this Warrant (properly endorsed if required) at the
principal office of the Company and upon payment to it by cash, certified check
or bank draft of the purchase price for such shares. The shares so purchased
shall be deemed to be issued as of the close of business on the date on which
this Warrant has been exercised by payment to the Company of the Warrant
Exercise Price. Certificates for the shares of stock so purchased shall be
delivered to the Holder within ten (10) business days after the rights
represented by this Warrant shall have been so exercised and, unless this
Warrant has expired, a new Warrant representing the number of shares, if any,
with respect to which this Warrant has not been exercised shall also be
delivered to the Holder within such time.

         2. COVENANTS OF THE COMPANY. The Company covenants and agrees that all
shares that may be issued upon the exercise of the rights represented by this
Warrant (the "Warrant Shares") shall, upon issuance, be duly authorized and
issued, fully paid and nonassessable shares. The Company further covenants and
agrees that during the period within which the rights represented

<PAGE>

by this Warrant may be exercised, the Company will at all times have authorized,
and reserved for the purpose of issue or transfer upon exercise of the
subscription rights evidenced by this Warrant, a sufficient number of shares of
its Common Stock to provide for the exercise of the rights represented by this
Warrant.

         3. ANTIDILUTION ADJUSTMENTS. The foregoing provisions are, however,
subject to the following:

                  (1) The Warrant Exercise Price shall be subject to adjustment
from time to time as hereinafter provided. Upon each adjustment of the Warrant
Exercise Price, the Holder shall thereafter be entitled to purchase, at the
Warrant Exercise Price resulting from such adjustment, the number of shares
obtained by multiplying the Warrant Exercise Price in effect immediately prior
to such adjustment by the number of shares purchasable pursuant hereto
immediately prior to such adjustment and dividing the product thereof by the
Warrant Exercise Price resulting from such adjustment.

                  (2) In case the Company shall at any time divide the
outstanding shares of its Common Stock into a greater number of shares (whether
pursuant to a stock split, stock dividend or otherwise), and conversely in case
the outstanding shares of its common stock shall be combined into a smaller
number of shares, the Warrant Exercise Price in effect immediately prior to such
division or combination shall be proportionately adjusted to reflect the
reduction or increase in the value of each such common share.

                  (3) If any capital reorganization or reclassification of the
capital stock of the Company, or consolidation or merger of the Company with
another corporation, or the sale of all or substantially all of its assets to
another corporation shall be effected in such a way that holders of the
Company's Common Stock shall be entitled to receive stock, securities or assets
with respect to or in exchange for such common shares, then, as a condition of
such reorganization, reclassification, consolidation, merger or sale, the Holder
shall have the right to purchase and receive upon the basis and upon the terms
and conditions specified in this Warrant and in lieu of the shares of the common
stock of the Company immediately theretofore purchasable and receivable upon the
exercise of the rights represented hereby, such shares of stock, other
securities or assets as would have been issued or delivered to the Holder as if
it had exercised this Warrant and had received such shares of common stock prior
to such reorganization, reclassification, consolidation, merger or sale. The
Company shall not effect any such consolidation, merger or sale, unless prior to
the consummation thereof the successor corporation (if other than the Company)
resulting from such consolidation or merger or the corporation purchasing such
assets shall assume by written instrument executed and mailed to the registered
Holder of this Warrant at the last address of such Holder appearing on the books
of the Company, the obligation to deliver to such Holder such shares of stock,
securities or assets as, in accordance with the foregoing provisions, such
Holder may be entitled to purchase.

                  (4) If the Company takes any other action, or if any other
event occurs which does not come within the scope of the provisions of Sections
3(1) through 3(3), but which should

                                       2
<PAGE>

result in an adjustment in the Warrant Exercise Price and/or the number of
shares subject to this Warrant in order to fairly protect the purchase rights of
the Holder, an appropriate adjustment in such purchase rights shall be made by
the Company.

                  (5) Upon any adjustment of the Warrant Exercise Price, the
Company shall give written notice thereof, by first class mail, postage prepaid,
addressed to the registered Holder of this Warrant at the address of such Holder
as shown on the books of the Company, which notice shall state the Warrant
Exercise Price resulting from such adjustment and the increase or decrease, if
any, in the number of shares purchasable at such price upon the exercise of this
Warrant, setting forth in reasonable detail the method of calculation and the
facts upon which such calculation is based.

         4. NO VOTING RIGHTS. This Warrant shall not entitle the Holder to any
voting rights or other rights as a stockholder of the Company.

         5. AMENDMENT. Neither this Warrant nor any term hereof may be amended,
waived, discharged or terminated orally but only by an instrument in writing
signed by the party against which enforcement of the amendment, waiver,
discharge or termination is sought.

         IN WITNESS WHEREOF, the Company has caused this Warrant to be signed
and delivered by a duly authorized officer as of the 14th day of August, 2000.

                                       MERCURY WASTE SOLUTIONS, INC.

                                       By:       /s/ Todd Anderson
                                            ------------------------------------
                                       Name:     Todd Anderson
                                            ------------------------------------
                                       Its:      Chief Financial Officer
                                            ------------------------------------

                                       3
<PAGE>

                          MERCURY WASTE SOLUTIONS, INC.
                                WARRANT EXERCISE

                  (TO BE SIGNED ONLY UPON EXERCISE OF WARRANT)

         The undersigned, the holder of the foregoing Warrant, hereby
irrevocably elects to exercise the purchase right represented by such Warrant
for, and to purchase thereunder, _____ shares of the Common Stock of Mercury
Waste Solutions, Inc. to which such Warrant relates and herewith makes payment
of $_______________ therefor in cash or by certified or cashier's check and
requests that the certificates for such shares be issued in the name of, and be
delivered to, ______________________________________________, whose address is
set forth below the signature of the undersigned. If said number of shares shall
not be all the shares purchasable under the Warrant, a new Warrant is to be
issued in the name of the undersigned for the balance remaining of the shares
purchasable thereunder.

                                     Name of Warrant Holder:

                                     Bankers American Capital Corporation
                                     -------------------------------------------
                                     (Please print)

                                     Address of Warrant Holder:

                                     302 North Riverfront Drive
                                     Mankato, Minnesota 56001

                                     Tax Identification No. or
                                     Social Security No. of Warrant Holder:

                                     -------------------------------------------

                                     Signature
                                               ---------------------------------

                                     NOTE: THE ABOVE SIGNATURE SHOULD CORRESPOND
                                     EXACTLY WITH THE NAME OF THE WARRANT HOLDER
                                     AS IT APPEARS ON THE FIRST PAGE OF THE
                                     WARRANT.

                                     Dated:
                                            ------------------------------------

                                       4

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