Document:

ISG RESOURCES, INC.
                                                                R. Steve Creamer
                                            Chairman and Chief Executive Officer

November 30, 1999                                            VIA FEDERAL EXPRESS
                                                                   (801)424-0223

Mr. Dennis S. Engh
Utah Clay Technology, Inc.
3985 South 2000 East
Salt Lake City, Utah 84124

Dear Mr. Engh:

     This letter (this "Letter Agreement") is written to summarize the principal
terms of a proposal being considered by ISG Resources, Inc., or its assignee
("ISG"), regarding the possible joint venture with Utah Clay Technology, Inc.
("UCT") for the mining, production, and marketing of kaolin clay products, among
other products. In this Letter Agreement, ISG and UCT are sometimes called the
"Parties" and the transaction in general is sometimes called the "Joint
Venture". It is our desire to commence negotiating a Joint Venture Agreement.
Upon receipt of an original executed copy of this Letter Agreement, we will
begin drafting an initial draft of the Joint Venture Agreement.

1.   BASIC TRANSACTION

     UCT will provide ISG access to all of its mineral deposits along with
consulting and marketing efforts. ISG will provide testing for the kaolin,
within ISG's discretion. ISG will also provide infrastructure to generate
marketable kaolin products, and market those products jointly with UCT. The
closing of this transaction (the "Closing") would occur on or before February 1,
2000.

2.   DUE DILIGENCE

     a. ISG will continue to perform due diligence on the minerals from UCT's
sites, through grinding and testing. Through this due diligence and input from
UCT, ISG will determine the relevant markets for the potential products
generated from the minerals, and from which ISG will negotiate a long term
agreement with UCT. ISG will continue to perform due diligence to analyze the
UCT minerals for markets including but not limited to: Facing Granules, Sand
Blast, Fillers-Elastimers, Fillers-Masonry, and Pozzolan.

3.   OTHER TERMS

     a. UCT will make representations and warranties to ISG, and will provide
comprehensive covenants, indemnities and other protections for ISG's benefit.

                       An INDUSTRIALSERVICESGROUP Company
                             Corporate Headquarters
           136 East South Temple, Suite 1300, Salt Lake City, UT 84111

                                                                    Exhibit 10.5
                                                               Page 1 of 6 Pages
<PAGE>

Mr. Dennis S. Engh, President
November 30, 1999
Page 2

     b. The consummation of the transaction provided for in the Joint Venture
Agreement is subject to ISG's satisfaction with the results of ISG's
investigation (financial, legal, contractual, etc.) of UCT's business and the
negotiation and execution of a mutually agreeable Joint Venture Agreement. The
transaction provided for in the Joint Venture Agreement is also subject to ISG's
satisfaction with the results of its tests on the kaolin in UCT's deposits and a
marketing analysis thereof.

4.   ACCESS

     During the period from the date this Letter Agreement is signed by UCT (the
"Signing Date") until the date on which either Party provides the other Party
with written notice that negotiations toward the Joint Venture Agreement are
terminated (the "Termination Date"), or until the date on which the Joint
Venture is completed, whichever is later, UCT will afford ISG, and its
representatives full and free access to the mineral deposits, a reasonable
supply of the minerals (kaolin) for testing, and all documents and data related
thereto.

5.   EXCLUSIVE DEALING

     Until the later of (i) ninety (90) days after the Signing Date or (ii) the
Termination Date:

     a.   UCT will not, directly or indirectly, through any representative or
     otherwise, solicit or entertain offers from, negotiate with or in any
     manner encourage, discuss, accept, or consider any proposal of any other
     person relating to a joint venture or the sale of UCT, its assets or
     business, in whole or in part, whether directly or indirectly, through
     purchase, merger, consolidation, or otherwise; and

     b.   UCT will immediately notify ISG regarding any contact between UCT or
     their respective representatives and any other person regarding any such
     offer or proposal or any related inquiry.

6.   CONFIDENTIALITY

     Except as and to the extent required by law, ISG will not disclose or use,
and will direct its representatives not to disclose or use to the detriment of
UCT, any Confidential Information (as defined below) with respect to that
furnished, or to be furnished, by UCT or its respective representatives to ISG
or its representatives at any time or in any manner other than in connection
with its evaluation of the transaction proposed in this Letter Agreement. For
purposes of this Paragraph, "Confidential Information" means any information
about the Company stamped "confidential" or identified in writing as such to ISG
by UCT promptly following its disclosure, unless (i) such information is already
known to ISG or its representatives or to others not bound by a duty of
confidentiality or such information becomes publicly available through no fault
of ISG or its representatives, (b) the use of such information is necessary or

                                                                    Exhibit 10.5
                                                               Page 2 of 6 Pages

<PAGE>

Mr. Dennis S. Engh, President
November 30, 1999
Page 3

appropriate in making any filing or obtaining any consent or approval required
for the consummation of the Joint Venture, or (c) the furnishing or use of such
information is required by or necessary or appropriate in connection with legal
proceedings. Upon the written request of UCT, ISG will promptly return to UCT or
destroy any Confidential Information in its possession and certify in writing to
UCT that it has done so.

7.   DISCLOSURE

     Except as and to the extent required by law, without the prior written
consent of the other Party, neither ISG nor UCT will, and each will direct its
representatives not to make, directly or indirectly, any public comment,
statement, or communication with respect to, or otherwise to disclose or to
permit the disclosure of the existence of discussions regarding, a possible
transaction between the Parties or any of the terms, conditions, or other
aspects of the transaction proposed in this Letter Agreement. If a Party is
required by law to make any such disclosure, it must first provide to the other
Party the content of the proposed disclosure, the reasons that such disclosure
is required by law, and the time and place that the disclosure will be made.

8.   COSTS

     ISG and UCT will be responsible for and bear all of their own costs and
expenses (including any broker's or finder's fees and the expenses of its
representatives) incurred at any time in connection with pursuing or
consummating the Joint Venture.

9.   ENTIRE AGREEMENT

     This Letter Agreement constitutes the entire agreement between the parties,
and supersedes all prior oral or written agreements, understandings,
representations and warranties, and courses of conduct and dealing between the
parties on the subject matter hereof. Except as otherwise provided herein, this
Letter Agreement may be amended or modified only by a writing executed by all of
the parties.

10.  GOVERNING LAW

     This Letter Agreement will be governed by and construed under the laws of
the State of Utah without regard to conflicts of laws principles.

11.  TERMINATION

     This Letter Agreement will automatically terminate ninety (90) days from
the date hereof, and may be terminated earlier upon written notice by either
party to the other party unilaterally, for any reason or no reason, with or
without cause, at any time; provided, however, that the termination of this
Letter Agreement will not affect the liability of a party for breach of any of

                                                                    Exhibit 10.5
                                                               Page 3 of 6 Pages
<PAGE>

Mr. Dennis S. Engh, President
November 30, 1999
Page 4

the provisions hereof prior to the termination. Upon termination of the Letter
Agreement, the parties will have no further obligations hereunder, except as
stated in Paragraphs 6, 8, 9 and 10 of this Letter Agreement, which will survive
any such termination.

12.  COUNTERPARTS

     This Letter Agreement may be executed in one or more counterparts, each of
which will be deemed to be an original copy of this Letter Agreement and all of
which, when taken together, will be deemed to constitute one and the same
agreement.

13.  NO LIABILITY

     Except as expressly provided in this Letter Agreement (or as expressly
provided in any binding written agreement that the Parties may enter into in the
future), no past or further action, course of conduct, or failure to act
relating to the Joint Venture, or relating to the negotiation of the terms of
the Joint Venture or any Joint Venture Agreement, will give rise to or serve as
a basis for any obligation or other liability on the part of the Parties.

     If you are in agreement with the foregoing, please sign and return one copy
of this Letter Agreement to my office. We look forward to working with you.

                                           Sincerely,

                                           /s/ R. Steve Creamer

                                           R. Steve Creamer

RSC/cjb

Utah Clay Technology, Inc.:

/s/ Dennis S. Engh
------------------
Dennis S. Engh
November 30, 1999

                                                                    Exhibit 10.5
                                                               Page 4 of 6 Pages
<PAGE>

ISG RESOURCES, INC.
February 10,2000
                                                         PERSONAL & CONFIDENTIAL

Mr. Dennis S. Engh
Utah Clay Technology, Inc.
3985 South 2000 East
Salt Lake City, Utah 84124

           Re: Extension of Letter Agreement dated November 30, 1999,
               ("Agreement") between ISG Resources, Inc. ("ISG") and Utah Clay
               Technology, Inc. ("UCT")

Gentlemen:

     This letter will confirm an extension of the Agreement between ISG and UCT.
ISG, at UCT's request, agrees to extend the Agreement for the period of one and
one-half months beginning February 1, 2000 and ending on March 15, 2000
("Extension Period"). In consideration thereof, UCT agrees that for the
Extension Period ISO will continue to perform due diligence, at its discretion,
to evaluate the potential markets and uses for kaolin products.

                                                   Sincerely,

                                                   /s/ Curtis J. Brown

                                                   Curtis J. Brown
                                                   Assistant Secretary

     I have read this letter and it accurately reflects the agreement between
     ISG and UCT regarding the terms set forth herein.

                                                   Utah Clay Technology, Inc.

                                                   /s/ Dennis S. Engh

                                                   By:  Dennis Engh
                                                   Its: President

                       An INDUSTRIALSERVICESGROUP Company
                             Corporate Headquarters
           136 East South Temple. Suite 1300, Salt Lake City, UT 84111

                                                                    Exhibit 10.5
                                                               Page 5 of 6 Pages
<PAGE>

ISG RESOURCES, INC.
June 15, 2000                                            PERSONAL & CONFIDENTIAL

Mr. Dennis S. Engh
Utah Clay Technology, Inc.
3985 South 2000 East
Salt Lake City, Utah 84124

                   Re: Letter Agreement for Product Evaluation

Gentlemen:

     This letter confirms at UCT's request, that ISG is currently and in the
ongoing process of evaluation and analyzation of UCT's mineral deposits. Through
this evaluation, ISG is testing the characteristics of some of UCT's deposits to
determine the feasibility for marketing and sales of those minerals in modified
form in pozzolanic and cementitious applications. In consideration thereof, UCT
agrees that ISG will continue to perform due diligence, at its discretion, to
evaluate the potential markets and uses for UCT's mineral deposits.

                                                    Sincerely,

                                                    /s/ Curtis J. Brown

                                                    Curtis J. Brown
                                                    Associate General Counsel &
                                                    Assistant Secretary

I have read this letter and it accurately reflects the agreement between ISG and
UCT regarding the terms set forth herein.

                                                    Utah Clay Technology, Inc.

                                                    /s/ Dennis S. Engh
                                                    By:  Dennis S. Engh
                                                    Its: President

                       An INDUSTRIALSERVICESGROUP Company
                             Corporate Headquarters
           136 East South Temple, Suite 1300, Salt Lake City, UT 84111
                     Phone (801) 236-9700 Fax (801) 236-9730

                                                                    Exhibit 10.5
                                                               Page 6 of 6 PagesPrecision Systems Engineering
                              1954 East 7000 South
                            Salt Lake City, UT 84121
                                 (801) 943-5555
                               Fax: (801) 943-5848

June 14, 1999

Dennis Engh, President
Utah Clay Technology Inc.
3985 South 2000 East
Salt Lake City, UT  84124

Subject:  Engineering and Design of the Kaolin Facility
          PSE Project No. 1998327

Dear Dennis:

I am writing you this letter to document the commitment being made by Precision
Systems Engineering (PSE) to support the efforts of UCT. As you are probably
aware, we have been working with Tony Lotito to help him come up with an
estimate for an installed cost for the Kaolin facility. This has taken minimal
effort but we are now about to commit some major effort to prepare for a visit
by UCT's process engineer, Mr. Tom Dombrowski.

To support UCT's financial requirements and meet the schedules, we see the
following efforts by PSE over the next 2 weeks:

1.   Arrange for a quality-mining engineer to verify that the reserves are
     existing. The cost is approximately $7,000 for this item, including his
     airfare and living expenses.

2.   Prepare preliminary PFD's and cost estimates for Tom to review and comment
     on while he is here next week. We will prepare different scenarios to
     review. This will cost approximately $5,200. The goal is to finalize a
     workable PFD prior to Tom's departure Wednesday afternoon.

3.   Coordinate with Hicom to see if their crusher will work in this
     application. It is their plan to be here next week to work with Tom and
     PSE. We will work with Hicom this week in preparation for next week. This
     will cost approximately $1,300.

                                                                    Exhibit 10.6
                                                               Page 1 of 4 Pages
<PAGE>

Engineering and Design of the Kaolin Facility
PSE Project No. 1998327
June 14, 1999
Page 2

Dennis, we are more then willing to commit to supporting UCT. We feel it makes
good business sense to let you know that these efforts, along with the efforts
we have expended prior to today, need to be recognized.

Now that we are bringing in an outside resource that will obligate PSE further,
we must have your written approval before proceeding further. Please acknowledge
the obligation that UCT has to PSE by signing below and faxing the executed
document back to PSE. The original will follow under separate cover.

It is a pleasure working with you and your associates at UCT.

Sincerely yours,

/s/ Merrill D. Shumway

Merrill D. Shumway
President

cc:  Mike Vuich,
     Ron Ostler
     Mike McMullin

I acknowledge the efforts and cost by PSE for Utah Clay Technologies. Utah Clay
Technologies will commit to pay for these costs as the funds are raised. Whether
the funds are raised or not, I acknowledge this is an obligation by Utah Clay
Technologies to Precision Systems Engineering.

Signed: /s/ Dennis Engh, President                            Date: 6-18-99
----------------------------------                            -------------
        Dennis Engh
        President

                                                                    Exhibit 10.6
                                                               Page 2 of 4 Pages
<PAGE>

                           Utah Clay Technology, Inc.
                              3985 South 2000 East
                               Salt Lake City, UT
                                 (801) 424-0223
                               Fax: (801) 272-7627

November 16, 1999

Mr. Merrill D. Shumway
President
Precision Systems Engineering
1954 East 7000 South
Suite 200
Salt Lake City, Utah 84121

Subject:  Kaolin Processing Facility

Dear Mr. Shumway,

This letter will confirm the intent of Utah Clay Technologies, Inc., to enter
into a formal contact with Precision Systems Engineering to provide all
engineering, procurement and construction services required to obtain an
operating Kaolin Clay Processing Facility to be located in a yet undetermined
location within the State of Utah. The scope of work, contract completion dates,
contract type, and contract value will be determined at the time of contract
negotiation and execution. It is our intention to execute the contract within 60
days of this letter.

Precision Systems Engineering is authorized to proceed with the project under a
limited scope to provide services necessary to complete process design, retain
the outside consulting services of Mineral Resource Development Inc (MRDI) to
verify the mineral reserves and complete a feasibility study for presentation to
the finance community, to provide management and administration services in
support of the MRDI effort, retain outside consultants for support in state and
federal environmental and mining permitting, provide management and
administration services for support of the environmental and permitting efforts
and to determine the capital cost of the facility.

In the event that Utah Clay Technology, Inc. does not acquire the necessary
funding to execute a contract with Precision Systems Engineering, within the
above stated period, Utah Clay Technology Inc agrees to compensate Precision
Systems Engineering for services provided to the expiration date of the
execution period at the billing rate of personnel involved and all costs plus
fifteen percent (15%) for all items and outside services procured in connection
with performing services on the good faith promise of a contract execution.

                                                                    Exhibit 10.6
                                                               Page 3 of 4 Pages
<PAGE>

UCT agrees to offer up to 400,000 shares of common stock to PSE at the rate of
$0.25 per share as partial payment of its existing debt to PSE. Should funding
not be acquired UCT agrees to offer additional stock as payment of debt.

We are looking forward to working with your firm on this very important project
and that together as a team; we can complete this project on schedule and within
budget.

Sincerely,

/s/ Dennis Engh

Dennis Engh
President

                                                                    Exhibit 10.6
                                                               Page 4 of 4 Pages

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