Document:

<PAGE>
                                                                   EXHIBIT 10.3

                             [SYSTEMONE LETTERHEAD]

                                December 9, 2002

To the Investors set forth on the signature page hereto:

         RE:      WARRANTS (THE "WAIVER WARRANTS") TO PURCHASE AN AGGREGATE OF
                  250,000 SHARES (THE "SHARES") OF COMMON STOCK, $.001 PAR VALUE
                  PER SHARE, OF SYSTEMONE TECHNOLOGIES INC. (THE "COMPANY") AT
                  AN EXERCISE PRICE OF $.01 PER SHARE TO BE ISSUED PURSUANT TO
                  THAT CERTAIN WAIVER AGREEMENT DATED DECEMBER 9, 2002 TO THE
                  HOLDERS NAMED THEREIN.

Ladies and Gentlemen:

         The Company and the Investors (as defined in the Letter Agreement
hereinafter referenced) previously entered into a Letter Agreement dated
February 27, 2002 (the "Letter Agreement") regarding Registrable Securities of
the Company (as that term is defined therein). The Company and the Investors
hereby supplement the Letter Agreement such that the Shares issued or issuable
upon exercise of the Waiver Warrants shall be deemed Registrable Securities
under the Loan Agreement (as defined thereunder) for purposes of paragraphs (a)
through (c) of the Letter Agreement. Except as supplemented hereby, the Letter
Agreement shall remain unchanged and in full force and effect; it being
acknowledged and agreed that for purposes of the foregoing Registrable
Securities, Loan Agreement, the Effectiveness Period (as defined under the Loan
Agreement) shall extend until the earliest to occur of (a) two years from the
date of exercise of the last Waiver Warrant to be exercised prior to the
expiration thereof, (b) the date on which the holders of the foregoing
Registrable Securities have completed the sale or distribution described in the
registration statement relating thereto, or (c) the date on which such
Registrable Securities may be sold under Rule 144(k) in the reasonable opinion
of counsel to the Company provided that the Company's transfer agent has
accepted an instruction from the Company to such effect).

         If the foregoing is acceptable, please execute a copy of this letter
agreement in the space provided and return such executed copy to the
undersigned.

                                                     Very truly yours,

                                                     SYSTEMONE TECHNOLOGIES INC.

                                                     By:/s/ Paul I. Mansur
                                                        ------------------
                                                     Paul I. Mansur
                                                     Chief Executive Officer
<PAGE>
                                                                   Exhibit 10.3

Agreed to an accepted as of the date first above written:

Investors:

ENVIRONMENTAL OPPORTUNITIES FUND II, L.P.             HANSEATIC AMERICAS LDC
ENVIRONMENTAL OPPORTUNITIES FUND II
(INSTITUTIONAL), L.P.                                 By:  Hanseatic Corporation

By: Fund II Mgt. Co., LLC
    General Partner                                   By: /s/ Paul A. Biddelman
                                                          ---------------------
                                                      Paul A. Biddelman
                                                      President
         By: /s/ Bruce McMaken
             -----------------
         Bruce McMaken
         Manager

ENVIRONMENTAL OPPORTUNITIES FUND, L.P.

By: Environmental Opportunities Management Co.,
    LLC
    General Partner

         By: /s/ Bruce McMaken
             -----------------
         Bruce McMaken
         Manager<PAGE>

                                                                  EXHIBIT 10.1

                                SECOND AMENDMENT

                                       TO

                           LOAN AND SECURITY AGREEMENT

        Second Amendment, dated as of September 19, 2002 (this "Amendment"), to
the Loan and Security Agreement, dated as of July 23, 2001 (as amended, the
"Loan Agreement") by and among (i) the lenders identified on the signature pages
hereof (such lenders, together with their respective successors and assigns, are
referred to hereinafter each individually as a "Lender" and collectively as the
"Lenders"), (ii) FOOTHILL CAPITAL CORPORATION, a California corporation, as the
arranger and administrative agent for the Lenders ("Agent"), and (iii) SCB
COMPUTER TECHNOLOGY, INC., a Tennessee corporation ("Parent"), and each of
Parent's Subsidiaries identified on the signature pages hereof (such
Subsidiaries, together with Parent, are referred to hereinafter each
individually as a "Borrower", and individually and collectively, jointly and
severally, as the "Borrowers").

        The Borrowers, the Lenders and the Agent desire to amend the Loan
Agreement to (i) permit the Borrowers to effect the statutory mergers of certain
Subsidiaries of the Parent with and into the Parent and (ii) amend certain other
provisions of the Loan Agreement, in each case on the terms and conditions
hereinafter set forth.

        Accordingly, the Borrowers, the Agent and the Lenders hereby agree as
follows:

        1. Definitions. All capitalized terms used herein and not otherwise
defined herein are used herein as defined in the Loan Agreement.

        2. Existing Definitions. (a) The definition of the term "Eligible
Accounts" in Section 1.1 of the Loan Agreement is hereby amended by deleting the
reference to "Honeywell" in clause (i) of subparagraph (i) thereof, and
inserting "IBM Corporation" in lieu thereof.

           (b) The definition of the term "Eligible Unbilled Accounts" in
Section 1.1 of the Loan Agreement is hereby amended by deleting the reference to
"Honeywell" in clause (i) of subparagraph (i) thereof, and inserting "IBM
Corporation" in lieu thereof.

           (c) The definition of the term "Revolver Margin" in Section 1.1 of
the Loan Agreement is hereby amended in its entirety to read as follows:

               "'Revolver Margin' means, for any day, 1.00%."

           (d) The definition of the term "Term Loan Margin" in Section 1.1 of
the Loan Agreement is hereby amended in its entirety to read as follows:

               "'Term Loan Margin' means, for any day, 2.25%."

<PAGE>

        3. Distributions. Section 7.11 of the Loan Agreement is hereby amended
by deleting of the reference to "$5,000,000" in clause (c)(iv) thereof, and
inserting "$4,000,000" in lieu thereof.

        4. Waiver and Consent. (a) Fundamental Changes. (i) The Parent desires
to effect (A) a statutory merger of Partners Capital Group, a California
corporation and wholly-owned subsidiary of the Parent ("Partners") with and into
the Parent pursuant to that certain Plan of Merger adopted by the Board of
Directors of the Parent on June 20, 2002 and (B) a statutory merger of Delta
Software Systems, Inc., a Tennessee corporation and wholly-owned subsidiary of
the Parent ("Delta", and together with Partners, each a "Merging Subsidiary" and
collectively, the "Merging Subsidiaries"), with and into the Parent pursuant to
that certain Plan of Merger adopted by the Board of Directors of the Parent on
September 10, 2002, in each case pursuant to which (1) each Merging Subsidiary
shall merge with and into the Parent, which shall survive each merger and
continue to be a corporation governed by the laws of the State of Tennessee, (2)
the separate existence of each Merging Subsidiary shall cease, (3) all
outstanding shares of common stock of each Merging Subsidiary shall
automatically and by operation of law be cancelled and any certificates
evidencing ownership of such shares shall be void and of no effect and (4) the
charter and bylaws of the Parent shall remain the charter and the bylaws of the
Parent following the effective date of each merger (collectively, the
"Mergers").

            (ii) Pursuant to the request of the Parent, the Required Lenders
under the Loan Agreement as of the date hereof hereby consent to and waive any
Event of Default that would otherwise arise under Section 8.2 of the Loan
Agreement from any noncompliance by the Borrowers with Section 7.3(a) of the
Loan Agreement directly as a result of the Mergers.

        (b) Financial Covenants. Pursuant to the request of the Parent, the
Required Lenders hereby consent to and waive any Event of Default that would
otherwise arise under Section 8.2 of the Loan Agreement from any noncompliance
by the Borrowers with Section 7.20(a) of the Loan Agreement arising out of the
failure of the Borrowers and their Subsidiaries to attain a Minimum EBITDA of at
least $10,000,000 for the 12 month period ending April 30, 2003; provided that
the actual Minimum EBITDA of the Borrowers and their Subsidiaries for such
period is not less than $9,550,000.

        The Required Lenders' waiver and consent provided for in this paragraph
4 (i) shall become effective as of the Amendment Effective Date, (ii) shall be
effective only in this specific instance and for the specific purposes set forth
herein, and (iii) does not allow for any other or further departure from the
terms and conditions of the Loan Agreement or any other Loan Document, which
terms and conditions shall continue in full force and effect.

        5. Conditions to Effectiveness. This Amendment shall become effective
only upon satisfaction in full of the following conditions precedent (the first
date upon which all such conditions have been satisfied being herein called the
"Amendment Effective Date"):

           (a) The representations and warranties contained in this Amendment
and in Section 5 of the Loan Agreement and each other Loan Document shall be
correct on and as of the Amendment Effective Date as though made on and as of
such date (except where such representations and warranties relate to an earlier
date in which case such representations and

<PAGE>

warranties shall be true and correct as of such earlier date); no Event of
Default shall have occurred and be continuing on the Amendment Effective Date or
result from this Amendment becoming effective in accordance with its terms.

           (b) The Agent shall have received counterparts of this Amendment
which bear the signatures of the Borrowers, the Guarantors and the Lenders.

           (c) All legal matters incident to this Amendment shall be
satisfactory to the Agent and its counsel.

        6. Representations and Warranties. Each of the Borrowers represents and
warrants to the Lenders as follows:

           (a) Each Borrower (i) is a corporation duly organized, validly
existing and in good standing under the laws of the state of its incorporation
and (ii) has all requisite corporate power, authority and legal right to
execute, deliver and perform this Amendment and to perform the Loan Agreement,
as amended hereby.

           (b) The execution, delivery and performance by the Borrowers of this
Amendment and the performance by the Borrowers of the Loan Agreement as amended
hereby (i) have been duly authorized by all necessary corporate action, (ii) do
not and will not violate or create a default under any Borrower's charter or
by-laws, any applicable law or any contractual restriction binding on or
otherwise affecting any Borrower or any Borrower's properties, and (iii) except
as provided in the Loan Documents, do not and will not result in or require the
creation of any lien, security interest or other charge or encumbrance upon or
with respect to any Borrower's property.

           (c) No authorization or approval or other action by, and no notice to
or filing with, any Governmental Authority or other regulatory body is required
in connection with the due execution, delivery and performance by any Borrower
of this Amendment and the performance by the Borrowers of the Loan Agreement as
amended hereby.

           (d) Each of this Amendment and the Loan Agreement, as amended hereby,
constitute the legal, valid and binding obligations of the Borrowers,
enforceable against each Borrower in accordance with their terms.

           (e) The representations and warranties contained in Section 5 of the
Loan Agreement are correct on and as of the Amendment Effective Date as though
made on and as of the Amendment Effective Date (except to the extent such
representations and warranties expressly relate to an earlier date), and no
Event of Default has occurred and is continuing on and as of the Amendment
Effective Date.

        7. Continued Effectiveness of Loan Agreement. Each Borrower hereby (i)
confirms and agrees that each Loan Document to which it is a party is, and shall
continue to be, in full force and effect and is hereby ratified and confirmed in
all respects except that on and after the Amendment Effective Date all
references in any such Loan Document to "the Loan Agreement", "thereto",
"thereof", "thereunder" or words of like import referring to the Loan Agreement
shall mean the Loan Agreement as amended by this Amendment, and (ii) confirms

<PAGE>

and agrees that to the extent that any such Loan Document purports to assign or
pledge to the Agent, or to grant to the Agent a security interest in or lien on,
any collateral as security for the Obligations of the Borrowers from time to
time existing in respect of the Loan Agreement and the Loan Documents, such
pledge, assignment and/or grant of the security interest or lien is hereby
ratified and confirmed in all respects.

                  8. Miscellaneous.

                     (a) This Amendment may be executed in any number of
counterparts and by different parties hereto in separate counterparts, each of
which shall be deemed to be an original, but all of which taken together shall
constitute one and the same agreement. Delivery of an executed counterpart of
this Amendment by telefacsimile shall be equally as effective as delivery of an
original executed counterpart of this Amendment.

                     (b) Section and paragraph headings herein are included for
        convenience of reference only and shall not constitute a part of this
        Amendment for any other purpose.

                     (c) This Amendment shall be governed by, and construed in
        accordance with, the laws of the State of New York.

                     (d) The Borrowers will pay on demand all fees, costs and
expenses of the Agent in connection with the preparation, execution and delivery
of this Amendment, including, without limitation, the fees, disbursements and
other charges of Schulte Roth & Zabel LLP, counsel to the Agent.

                [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK]

<PAGE>

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed
by their respective officers thereunto duly authorized as of the day and year
first above written.

                            BORROWERS:

                            SCB COMPUTER TECHNOLOGY, INC.,
                            a Tennessee corporation

                            By:  /s/ Michael J. Boling
                                -------------------------------------------
                            Title: Executive Vice President Finance and
                            Administration

                            SCB COMPUTER TECHNOLOGY OF ALABAMA, INC., an
                            Alabama corporation

                            By:  /s/ Michael J. Boling
                                 ------------------------------------------
                            Title: Executive Vice President Finance and
                            Administration

                            PARTNERS RESOURCES INC., an Arizona corporation

                            By: /s/ Michael J. Boling
                                -------------------------------------------
                            Title: Executive Vice President Finance and
                            Administration

                            AGENT AND LENDER:

                            FOOTHILL CAPITAL CORPORATION,
                            a California corporation, as Agent and as a Lender

                            By: /s/ David J. Sanchez
                                -------------------------------------------
                            Title: Vice President

ACKNOWLEDGED AND AGREED:

PARTNERS CAPITAL GROUP,
a California corporation,

By: /s/ Michael J. Boling
    --------------------------------
Title: Executive Vice President Finance and Administration

DELTA SOFTWARE SYSTEMS, INC.,
a Tennessee corporation,

By: /s/ Michael J. Boling
    -------------------------------
Title: Executive Vice President Finance and Administration

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