<PAGE>

                                                                    EXHIBIT 10.4

                  AGREEMENT FOR PURCHASE OF MEMBERSHIP INTEREST

                                       in

                   Synthetic American Fuel Enterprises II, LLC

                                  by and among

               SYNTHETIC AMERICAN FUEL ENTERPRISES HOLDINGS, INC.,

                         MARRIOTT HOTEL SERVICES, INC.,

                                       and

                                  SERRATUS LLC

                                   dated as of

                                January 28, 2003

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                                TABLE OF CONTENTS

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<CAPTION>
                                                                              PAGE
<S>                                                                           <C>
ARTICLE 1 DEFINED TERMS.......................................................   2

1.1   Defined Terms...........................................................   2
1.2   Construction of Certain Terms and Phrases...............................   2

ARTICLE 2 SALE AND PURCHASE OF MEMBERSHIP INTEREST............................   3

2.1   Agreement to Sell and Buy...............................................   3
2.2   Purchase Price..........................................................   3
2.3   Base Note...............................................................   3
2.4   Fixed Deferred Payments.................................................   3
2.5   Variable Deferred Payments..............................................   3
2.6   Low Production Volume...................................................   8
2.7   Tax Event...............................................................   8
2.8   Payments................................................................   8
2.9   Execution and Closing...................................................   8
2.10  Actions to Occur on the Execution Date..................................  10
2.11  First Quarterly Payment Date............................................  12

ARTICLE 3 REPRESENTATIONS AND WARRANTIES......................................  12

3.1   Representations and Warranties Regarding Seller, MHSI and the
Operating Company.............................................................  12
3.2   Representations and Warranties Regarding the Operating Companies
- Historical..................................................................  14
3.3   Representations and Warranties Regarding the Operating Company..........  14
3.4   Updating of Schedules...................................................  22
3.5   Application of Representations and Warranties to 0.1% Interest..........  22
3.6   Representations and Warranties of Buyer.................................  22

ARTICLE 4 CERTAIN COVENANTS...................................................  23

4.1   Conduct of Operations...................................................  23
4.2   Existing Accounts Payable...............................................  24
4.3   Independent Engineer....................................................  24

ARTICLE 5 TAX MATTERS.........................................................  24

5.1   Tax Returns and Proceedings.............................................  24
5.2   Transaction Taxes.......................................................  25
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                                       -i-

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<TABLE>
<S>                                                                             <C>
5.3   Private Letter Ruling...................................................  25

ARTICLE 6 TERMINATION.........................................................  26

6.1   Termination.............................................................  26
6.2   Procedure and Effect of Termination.....................................  27

ARTICLE 7 INDEMNIFICATION.....................................................  28

7.1   Indemnification of Buyer................................................  28
7.2   Indemnification of Seller...............................................  28
7.3   Defense of Third Party Claims...........................................  28
7.4   Direct Claims...........................................................  30
7.5   After-Tax Basis.........................................................  30
7.6   Express Negligence Rule.................................................  31
7.7   No Duplication..........................................................  31
7.8   Sole Remedy.............................................................  31
7.9   Survival................................................................  31
7.10  Indemnification as to Historical Representations and Warranties;
Other Indemnification.........................................................  32

ARTICLE 8 GENERAL PROVISIONS..................................................  32

8.1   Exhibits and Schedules..................................................  32
8.2   Further Actions.........................................................  32
8.3   Amendment, Modification and Waiver......................................  33
8.4   Severability............................................................  33
8.5   Expenses and Obligations................................................  33
8.6   Parties in Interest.....................................................  33
8.7   Notices.................................................................  33
8.8   Counterparts............................................................  35
8.9   Entire Agreement........................................................  35
8.10  Governing Law; Choice of Forum; Waiver of Jury Trial....................  35
8.11  Public Announcements....................................................  35
8.12  Assignment..............................................................  35
8.13  Relationship of Parties.................................................  36
</TABLE>

                                      -ii-

<PAGE>

Annex I                 Definitions

Exhibits:
Exhibit A               Form of Base Note
Exhibit B               Form of Operations Report
Exhibit C               Form of Notice of Deferral of Scheduled Payments
Exhibit D               Form of Ruling Request
Exhibit E               Form of Buyer Parent Guaranty
Exhibit F               Form of Seller Parent Guaranty
Exhibit G               Form of Buyer Pledge and Security Agreement
Exhibit H               Form of Seller Pledge and Security Agreement
Exhibit I               Amended and Restated Limited Liability Company
                        Agreement of Synthetic American Fuel Enterprises
                        II, LLC
Exhibit J               Financial Statements
Exhibit K               Form of Customer Certificate
Exhibit L               Form of Escrow Agreement

Schedules:
Schedule 2.4            Fixed Deferred Payment Schedule
Schedule 2.5(b)         Estimated Tax Credit Methodology
Schedule 3.1(a)         Organizational Documents of the Company
Schedule 3.1(e)         Required Consents
Schedule 3.2            Historical Representations and Warranties
Schedule 3.3(a)         Liabilities of the Operating Company
Schedule 3.3(b)         Permits
Schedule 3.3(c)         Absence of Litigation
Schedule 3.3(d)         Insurance
Schedule 3.3(f)         Leased Real Property
Schedule 3.3(g)         Personal Property
Schedule 3.3(i)(i)      Environmental Matters
Schedule 3.3(i)(ii)     Environmental Matters
Schedule 3.3(i)(iii)    Environmental Matters
Schedule 3.3(k)         Company Contracts
Schedule 3.3(l)         Employee Matters
Schedule 3.3(p)(i)      Section 29
Schedule 3.3(p)(iv)A    List of Excluded Boxes
Schedule 3.3(p)(iv)B    Due Diligence Index
Schedule 3.3(p)(vii)    Section 29
Schedule 4.1            Testing Protocol

                                      -iii-

<PAGE>

                  AGREEMENT FOR PURCHASE OF MEMBERSHIP INTEREST

                This Agreement for Purchase of Membership Interest (this
"Agreement") is made and entered into as of January 28, 2003, by and among
Serratus LLC, a Delaware limited liability company (the "Buyer"), Synthetic
American Fuel Enterprises Holdings, Inc., an Oregon corporation ("Seller") and
Marriott Hotel Services, Inc., a Delaware corporation ("MHSI").

                                 R E C I T A L S

        A.      Seller owns a 49.9% membership interest in Synthetic American
Fuel Enterprises II, LLC, a Delaware limited liability company (the "Operating
Company" or "Company"), which, together with a 49.9% membership interest in
Synthetic American Fuel Enterprises I, LLC, a Delaware limited liability company
("SynAmerica I"), are the only assets of Seller.

        B.      Buyer owns a 0.1% membership interest in each of the Company and
SynAmerica I.

        C.      MHSI owns all of the outstanding capital stock of Seller and the
remaining 50% membership interests in each of the Operating Company and
SynAmerica I.

        D.      On the Closing Date (as defined herein) Seller will sell to
Buyer a 48.8% membership interest in the Company and concurrently therewith
Seller will sell to Buyer a 48.8% membership interest in SynAmerica I pursuant
to the SynAmerica I Purchase Agreement (as defined herein).

        E.      The Operating Company owns as its only assets two coal-based
synthetic fuel production facilities located in Alabama and one such facility in
Illinois (the "Facilities") and related real property interests, contracts,
licenses and permits.

        F.      Marriott International, Inc. ("Marriott") acquired all of the
capital stock of Seller and 49% of the membership interests in the Operating
Company and SynAmerica I from PacifiCorp Financial Services, Inc. ("PacifiCorp")
pursuant to a stock purchase agreement dated as of October 15, 2001 by and among
PacifiCorp, Marriott and Birmingham Syn Fuel I, Inc. (the "PacifiCorp/Marriott
Agreement").

        G.      Seller desires to sell, and Buyer desires to purchase from
Seller, a 48.8% membership interest in the Operating Company (together with the
0.1% membership interest, the "Membership Interest"), and thereby indirectly
acquire an interest in the Facilities, all in accordance with the terms and
subject to the conditions set forth herein.

        H.      On the date hereof, Seller, MHSI and Buyer will enter into the
Amended LLC Agreement (as defined herein), to be effective as of the Closing
Date.

        I.      Marriott (the "Seller Parent"), the sole owner of MHSI, is
deriving substantial benefit from the sale by Seller and the purchase by Buyer
of the Membership Interest and, in consideration thereof, has executed and
delivered to Buyer as of the date hereof the Seller Parent Guaranty (as
hereinafter defined), pursuant to which Seller Parent guarantees in favor of
Buyer

                                        1

<PAGE>

the obligations of Seller and MHSI hereunder and of MHSI under the Amended LLC
Agreement.

        J.      __________________ (the "Buyer Parent"), an Affiliate of Buyer,
is deriving substantial benefit from the sale by Seller and the purchase by
Buyer of the Membership Interest and, in consideration thereof, has executed and
delivered to Seller as of the date hereof the Buyer Parent Guaranty (as
hereinafter defined) pursuant to which Buyer Parent guarantees in favor of
Seller, MHSI and the Operating Company certain obligations of Buyer hereunder
and under the Amended LLC Agreement.

                NOW, THEREFORE, in consideration of the respective
representations, warranties, covenants, agreements, and conditions hereinafter
set forth, and other good and valuable consideration, the sufficiency of which
is hereby acknowledged, the parties hereto hereby agree as follows:

                                    ARTICLE 1
                                  DEFINED TERMS

        1.1     Defined Terms. Capitalized terms used but not otherwise defined
herein shall have the meanings given such terms in Annex I hereto.

        1.2     Construction of Certain Terms and Phrases. Titles appearing at
the beginning of any Articles, Sections, subsections, or other subdivisions of
this Agreement are for convenience only, do not constitute any part of such
Articles, Sections, subsections or other subdivisions, and shall be disregarded
in construing the language contained therein. The words "this Agreement,"
"herein," "hereby," "hereunder," and "hereof," and words of similar import,
refer to this Agreement as a whole and not to any particular subdivision unless
expressly so limited. The words "this Section," "this subsection," and words of
similar import, refer only to the Sections or subsections hereof in which such
words occur. The word "or" is not exclusive, and the word "including" (in its
various forms) means "including without limitation." Pronouns in masculine,
feminine, or neuter genders shall be construed to state and include any other
gender and words, terms, and titles (including terms defined herein) in the
singular form shall be construed to include the plural and vice versa, unless
the context otherwise requires. Unless the context otherwise requires, all
defined terms contained herein shall include the singular and plural and the
conjunctive and disjunctive forms of such defined terms, and the term "Annex,"
"Exhibit" or "Schedule" shall refer to an Annex, Exhibit or Schedule attached to
this Agreement. All references to the Code, U.S. Treasury regulations or other
governmental pronouncements shall be deemed to include references to any
applicable successor regulations or amending pronouncement.

                                        2

<PAGE>

                                    ARTICLE 2
                    SALE AND PURCHASE OF MEMBERSHIP INTEREST

        2.1     Agreement to Sell and Buy. Upon the terms and subject to the
conditions set forth in this Agreement, Seller shall sell, assign, transfer and
deliver to Buyer on the Closing Date, and Buyer shall purchase on the Closing
Date, a 48.8% membership interest in the Company for the consideration set forth
in Section 2.2.

        2.2     Purchase Price. The aggregate purchase price (the "Purchase
Price") for the Membership Interest being purchased under this Agreement,
subject to adjustment as set forth below, will be comprised of a cash payment on
the Closing Date in the amount of $1,000,000, the Base Note, the Fixed Deferred
Payments and Variable Deferred Payments as provided in Sections 2.3, 2.4 and
2.5.

        2.3     Base Note. On the Execution Date, Buyer shall execute and
deliver to Seller the promissory note in the amount of $17,000,000 in the form
attached hereto as Exhibit A (the "Base Note").

        2.4     Fixed Deferred Payments. Commencing on the first Quarterly
Payment Date following the Closing Date and on each Quarterly Payment Date
thereafter, continuing through the Quarterly Payment Date immediately following
December 31, 2007 (the "Fixed Payment Term"), Buyer shall make a payment to
Seller (a "Fixed Deferred Payment") as set forth on Schedule 2.4 hereto (subject
to adjustment as provided in Section 2.6 hereof). The Parties hereto acknowledge
and agree that the obligation of Buyer to make such Fixed Deferred Payments
pursuant to this Section 2.4, (x) is solely the obligation of Buyer and in no
event whatsoever shall any member of Buyer, any Affiliate of Buyer (including
Buyer Parent) or Affiliate of any member of Buyer have any obligation whatsoever
or any liability in any way to make such Fixed Deferred Payments, and (y) is
nonrecourse as against Buyer, and shall be satisfied only out of the Membership
Interest and collateral pledged pursuant to the Buyer Security Agreement. The
Fixed Deferred Payments shall be subordinated to payments then due and owing
under the Base Note.

        2.5     Variable Deferred Payments.

                (a)     Commencing on the first Quarterly Payment Date following
the Closing Date and on each Quarterly Payment Date thereafter continuing
through the Quarterly Payment Date immediately following December 31, 2007 or,
if earlier, the permitted withdrawal of Buyer (or of its successors or assigns,
as the case may be) as a member of the Operating Company, Buyer shall make a
payment to Seller in an amount (a "Variable Deferred Payment") equal to the
excess, if any, of (x) the Applicable Percentage of the Estimated Tax Credits
(as defined below) with respect to the prior Quarter, minus (y) the sum of (I)
the payment under the Base Note made with respect to such Quarter, (II) the
Fixed Deferred Payment made with respect to such Quarter as provided in Section
2.4 above and as adjusted pursuant to Section 2.6 hereof and (III) the capital
contributions made by Buyer, or by Buyer Parent on its behalf, to the Operating
Company in respect of such Quarter pursuant to Section 4.1 of the Amended LLC
Agreement. To the extent that the amount described in clause (y) of the
preceding sentence with respect to any Quarter exceeds the amount described in
clause (x) of the preceding sentence with respect to

                                        3

<PAGE>

such Quarter, the amount of the Variable Deferred Payment for such Quarter shall
be zero and such excess of (y) over (x) shall be carried forward to offset
future Variable Deferred Payments.

                (b)     "Estimated Tax Credits," with respect to any period
after the Closing Date, means the estimated Tax Credits generated during such
period as a result of the production of solid synthetic fuel at the Facilities
and the sale of such synthetic fuel to unrelated third parties that are
allocable to Buyer in respect of Buyer's ownership of the Membership Interest,
which estimate will be made in accordance with the methodology set forth in
Schedule 2.5(b) hereto; provided, however, that Excluded Sales will not be taken
into account. The Parties shall direct the Administrative Member to prepare and
deliver on or before the tenth day after the end of each Quarter or, in the case
of the first Quarter ending after the date hereof, the partial Quarter, to
Buyer, Seller and MHSI a written report (each, an "Operations Report"), in the
form attached hereto as Exhibit B, setting forth the following: (i) a
calculation of the Estimated Tax Credits made in accordance with the methodology
set forth in Schedule 2.5(b), and the amounts allocated to each Party for such
Quarter, (ii) Seller's, MHSI's and Buyer's capital contributions to be made to
the Operating Company pursuant to Section 4.1(c) of the Amended LLC Agreement
for such Quarter, (iii) the payment on the Base Note, the Fixed Deferred Payment
and Variable Deferred Payment owed by Buyer for such Quarter or partial Quarter
computed in accordance with Schedule 2.5(b) hereof and any recomputations made
by the Administrative Member under Sections 2.5(d) and 2.5(e) hereof during the
period after the date of the relevant prior Operations Report and (iv) MHSI's
initial estimate of the net taxable loss of the Operating Company for the
Quarter and of the depreciation available to Buyer for the Quarter with respect
to the special basis increase under Section 743(b) of the Code relating to
Buyer's purchase of its interest in the Operating Company. Each Operations
Report will include a detailed listing by customer of all synthetic fuel sales
from the Facilities and identification of any such sales that were Excluded
Sales, the allocation of receipts and costs to any sales of Pre-Sale Inventory,
and the average energy content per ton of synfuel produced and sold. Attached to
the Operations Report will be the analyses from the Independent Chemist of the
synthetic fuel produced during the Quarter. In addition, the Manager will
certify as part of the Operations Report: (w) the number of tons of synthetic
fuel sold to unrelated parties and that were not Excluded Sales, (x) a list of
payments proposed to be made from any capital contributions with respect to that
Quarter to the Operating Company, (y) that there was no change during the
Quarter to the equipment at the Facilities or, alternatively, that the only
changes were a list of repairs and improvements described in the Operations
Report, and (z) the synthetic fuel produced during the Quarter was produced in
compliance with the Amended LLC Agreement, the Request and the Private Letter
Ruling. Subject to Section 2.5(c), the Operations Report will be final and
binding on the Parties and will serve as the basis for the determination of
Variable Deferred Payments payable hereunder for such Quarter. Subject to
Section 2.5(c), Buyer shall pay Fixed Deferred Payments and Variable Deferred
Payments on or before the later of (i) the twentieth day after the end of the
Quarter or partial Quarter to which each such Fixed Deferred Payment and
Variable Deferred Payment relates and (ii) the tenth day after Buyer receives
the Operations Report from the Administrative Member (or, if such day is not a
Business Day, on the next succeeding Business Day) (each such date is referred
to herein as a "Quarterly Payment Date").

                (c)     If Buyer disputes the Administrative Member's
calculation of any items in an Operations Report, then Buyer shall notify the
Administrative Member and Seller not more than ten Business Days after Buyer has
received the applicable Operations Report from the

                                        4

<PAGE>

Administrative Member, and, in such event, Buyer, Seller and the Administrative
Member shall consider the issues raised or in dispute and discuss such issues
with each other and attempt to reach a mutually satisfactory agreement. If the
dispute as to the Administrative Member's calculations is not promptly resolved
within ten Business Days of such notification of the dispute, Buyer shall pay,
on such date, any undisputed portion of the amount then due, and any amount in
dispute may be withheld pending resolution of the dispute; it being understood
that such sums as are withheld by Buyer in accordance with this Section 2.5(c)
shall not give rise to any of Seller's rights under Section 6.1(a) hereof or the
Buyer Security Agreement unless (i) such dispute is resolved in Seller's favor
and (ii) Buyer fails to pay such disputed amount (together with interest at the
Commercial Paper Rate) within the time period specified below. Thereafter, Buyer
and MHSI shall each present their interpretations to the Accounting Firm, and
shall instruct the Accounting Firm to determine the correct amount of the
calculations in dispute (if applicable, in accordance with the methodology set
forth in Schedule 2.5(b) and Exhibit B) and to resolve the dispute promptly, but
in no event more than 30 calendar days after having the dispute submitted to it.
The Accounting Firm will make a determination as to each of the items in
dispute, which must be (i) in writing, (ii) furnished to each of MHSI and Buyer
and (iii) made in accordance with this Agreement, and which determination,
absent manifest error, will be conclusive and binding on Seller, MHSI and Buyer
and may be enforced in the courts specified in Section 8.10 hereof. In the event
the Accounting Firm determines that any of the calculations in dispute in the
Operations Report was incorrect, the fees and expenses of the Accounting Firm
shall be borne by MHSI, and in all other cases the fees and expenses of the
Accounting Firm shall be borne by Buyer. Each of MHSI and Buyer shall use
reasonable efforts to cause the Accounting Firm to render its decision as soon
as reasonably practicable, including by promptly complying with all reasonable
requests by the Accounting Firm for information, books, records and similar
items. Upon receipt by Buyer of the Accounting Firm's written determination of
the resolution of any such dispute in Seller's favor, Buyer shall pay all or any
portion of the amounts in dispute in accordance with such resolution plus
interest at the Commercial Paper Rate on the amounts in dispute from the date
such amounts were due until the date of payment thereof, such payment date being
in any event no later than ten Business Days from the receipt of such written
determination. Upon the resolution of any such dispute in Buyer's favor, the
amount in dispute shall not be considered due and owing and Seller and MHSI
shall have no rights whatsoever with respect to such amount under Section 6.1(a)
hereof or the Buyer Security Agreement.

                (d)     Each year within 15 Business Days following the later to
occur of (i) completion of the audited financial statements of the Operating
Company for the immediately preceding Fiscal Year and (ii) publication or
disclosure by the IRS of the revised inflation adjustment factors and the
reference prices applicable to the immediately preceding Fiscal Year pursuant to
Section 29(d)(2) of the Code, the Administrative Member shall recompute the
aggregate Estimated Tax Credits for each of the Quarters of the preceding Fiscal
Year using (I) such revised factor and taking into account the effect, if any,
of the operation of Section 29(b)(1) of the Code based on such reference price
and (II) information on actual sales to unrelated persons (as defined in Section
29(d)(7) of the Code) of solid synthetic fuel produced in the Facilities
reflected in such audited financial statements (such recomputed amount for any
Quarter being the "Actual Credit Amount"). For purposes hereof, the "Annual
Adjustment Amount" shall mean the aggregate of the following for all of the
Quarters of such preceding Fiscal Year: (w) the product of (I) the Applicable
Percentage and (II) the Actual Credit Amount for each Quarter, reduced by (x)
the Fixed Deferred Payment and the payments under the Base Note made

                                        5

<PAGE>

with respect to such Quarter but, in the case of this clause (x) only, not
reduced below zero, (y) the Variable Deferred Payment made with respect to such
Quarter and (z) capital contributions made by Buyer to the Operating Company
with respect to such Quarter. If the Annual Adjustment Amount is a positive
amount, such amount will be added to the amount of Buyer's Variable Deferred
Payment otherwise due on the Adjustment Date. If the Annual Adjustment Amount is
a negative amount, such amount will be used to reduce Buyer's Variable Deferred
Payment otherwise due on the Adjustment Date, or if such amount exceeds the
amount of Buyer's Variable Deferred Payment otherwise due on such date, the
excess amount will be successively credited against Buyer's Variable Deferred
Payments as they otherwise become due thereafter. In the event that the actual
Tax Credits claimed on the Company's federal income tax return for any such
Fiscal Year is different from the Actual Credit Amount for such Fiscal Year as
computed pursuant to this Section 2.5(d), an additional adjustment amount will
be promptly calculated and applied to adjust Buyer's Variable Deferred Payment
in the same manner as described above for the Annual Adjustment Amount.

                (e)     In the Fiscal Year that the Final Adjustment Date
occurs, within 15 Business Days following the later to occur of (i) completion
of the audited financial statements of the Operating Company for the immediately
preceding Fiscal Year and (ii) publication or disclosure by the IRS, pursuant to
Section 29(d)(2) of the Code, of the revised inflation adjustment factors and
the reference prices applicable to the immediately preceding Fiscal Year, the
Administrative Member shall calculate the Actual Credit Amount for such Fiscal
Year. For purposes hereof, the "Final Adjustment Amount" shall mean the amount
equal to the aggregate of the following for all of the Quarters of such
preceding Fiscal Year: (w) the product of (I) the Applicable Percentage and (II)
the Actual Credit Amount for each Quarter, reduced by (x) the Fixed Deferred
Payment and payments under the Base Note made with respect to such Quarter but,
in the case of this clause (x) only, not reduced below zero, (y) the Variable
Deferred Payment made with respect to such Quarter and (z) capital contributions
made by Buyer to the Operating Company with respect to such Quarter. If the
Final Adjustment Amount is positive, Buyer shall pay such amount to Seller on
the Final Adjustment Date; provided, however, that if any amount required to be
credited against the Variable Deferred Payments pursuant to Section 2.5(d)
exceeds such amount, Seller shall pay Buyer an amount equal to such excess. If
the Final Adjustment Amount is negative, then Seller shall pay such amount to
Buyer on the Final Adjustment Date plus any amount required to be credited
against the Variable Deferred Payments pursuant to Section 2.5(d). In the event
that the actual Tax Credits claimed on the Company's federal income tax return
for such Fiscal Year is different from the Actual Credit Amount for such Fiscal
Year as computed pursuant to this Section 2.5(e), an additional adjustment
amount will be promptly calculated and paid in the same manner as described
above for the Final Adjustment Amount.

                (f)     On or before the Closing Date, and within ten days after
the end of each Quarter thereafter, the Administrative Member shall provide to
Buyer a list of Persons to whom the Company anticipates or is considering
selling synthetic fuel, other than Pre-Sale Inventory (including information
reasonably available to the Administrative Member regarding the ultimate
ownership of such Person and applicable CUSIP number) (the "Customer List").
Seller shall, from time to time after the Closing Date, supplement the Customer
List with any additional Persons to whom the Operating Company anticipates or is
considering selling synthetic fuel during such Fiscal Year. Any such
supplemental Customer Lists shall be sent to Buyer by

                                        6

<PAGE>

registered or certified mail with postage prepaid and return receipt requested.
Within 10 Business Days following the Administrative Member's delivery of the
Customer List (or supplement thereto) or the Administrative Member's request as
to any specific Person that may be made from time to time, Buyer shall deliver
to the Administrative Member a "Customer Certificate" in the form attached as
Exhibit K hereto notifying the Administrative Member whether, as to each such
Person, the Person is a Cleared Person. As to any such Person, if Buyer fails to
deliver the Customer Certificate indicating that such Person is not a Cleared
Person within such 10 Business Day period, the Person shall be deemed to be a
Cleared Person until Buyer delivers to the Administrative Member a Customer
Certificate notifying the Administrative Member that such Person is not a
Cleared Person. To the extent any such Person is identified by Buyer in the
Customer List as not being a Cleared Person, the Parties will meet, discuss and
negotiate in good faith to develop and agree upon appropriate actions to
maximize the full value of the Tax Credits generated by the production and sale
of synthetic fuel at the Facilities, including, without limitation, possible
divestiture by Buyer or its Affiliates of interests in such customer and the
sale by Buyer of part or all of the Membership Interest to a third party as
provided in the Amended LLC Agreement or to Seller or its Affiliates. The
Administrative Member hereby agrees to keep confidential the information
contained in any Customer Certificate delivered by Buyer (except as necessary to
enforce this Agreement and any of the other Transaction Agreements or to the
extent such information made public by a party other than the Administrative
Member is required by law to disclose such information). Buyer hereby agrees to
keep confidential the information contained in any Customer List, or supplement
thereto, delivered by the Administrative Member (except as necessary to enforce
this Agreement and any of the other Transaction Agreements or to the extent such
information made public by a party other than Buyer and its Affiliates or Buyer
is required by law to disclose such information).

                (g)     Notwithstanding anything to the contrary contained in
this Article II, until the earlier of the delivery by Buyer to the Operating
Company and to Seller of a Termination Notice or December 31, 2003, all payments
required to be made by Buyer under this Article II, for the period from the
Closing Date until the foregoing earlier event (the "Initial Period"), up to an
amount equal to 44 percent of the Estimated Tax Credits for such period, shall
be made to the Escrow Agent to be held in the Escrow Account in accordance with
the Escrow Agreement. If Buyer delivers a Termination Notice to the Operating
Company and to Seller on or before December 31, 2003, (i) Buyer, MHSI and Seller
shall promptly thereafter instruct the Escrow Agent to pay over to Buyer the
amount in the Escrow Account (together with income earned as to such funds) on
the Termination Date, and, upon such payment being made, the Escrow Agreement
shall terminate, and (ii) thereafter, the aggregate of payments of Purchase
Price hereunder and capital contributions under the Amended LLC Agreement to be
made by Buyer (for the portion of the Initial Period as to which such payments
have not been made at the Termination Date) shall be made only to the extent of
75 percent of the Estimated Tax Credits; provided, however, that if the
Termination Date in the Termination Notice is prior to December 31, 2003,
Marriott in its sole discretion may elect, by notice in writing to Buyer within
five Business Days of receipt of the Termination Notice, to require Buyer to
remain as a partner in the Operating Company until December 31, 2003, in which
case the aggregate of payments of Purchase Price hereunder and capital
contributions under the Amended LLC Agreement to be made by Buyer for the period
from the Termination Date through December 31, 2003 shall be made only to the
extent of 70 percent of the Estimated Tax Credits of the amount otherwise

                                        7

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required to be paid. If Buyer does not deliver a Termination Notice before the
close of business on December 31, 2003, (y) Buyer, MHSI and Seller shall
promptly thereafter instruct the Escrow Agent to pay over to Seller the amount
in the Escrow Account (together with income earned as to such funds), and, upon
such payment being made, the Escrow Agreement shall terminate and (z)
thereafter, Buyer shall make in full (rather than in part to the Escrow Account)
all payments required to be made by it under this Article II.

                (h)     To the extent Buyer elects to waive financial
participation in the Company pursuant to Section 4.1(h) of the Amended LLC
Agreement, and no Tax Credits are allocated to Buyer as provided in the Amended
LLC Agreement, Buyer shall have no obligation to make a Variable Deferred
Payment on the Quarterly Payment Date following the end of the Quarter for which
the waiver is effective.

        2.6     Low Production Volume. In the event that the aggregate sales
(not counting Excluded Sales) of synthetic fuel produced at the Facilities fall
below 525,000 tons for any Quarter (for any reason, including without
limitation, a force majeure event), Buyer may defer the scheduled payment under
the Base Note and the Fixed Deferred Payment for such Quarter by giving Seller
written notice of such deferral on or before the Quarterly Payment Date in the
form of a notice substantially similar to Exhibit C hereto. Notwithstanding the
foregoing, Buyer may not defer the scheduled payment under the Base Note and the
Fixed Deferred Payments hereunder more than four times in aggregate during the
Fixed Payment Term. If Buyer makes the scheduled payment under the Base Note,
but defers the Fixed Deferred Payment, that shall be regarded as a deferral for
purposes of the preceding sentence. In the event of any deferral under this
Section 2.6, the deferred amounts will be reallocated over the remaining
scheduled payments, assuming an interest rate of 8% per annum on such deferred
amounts.

        2.7     Tax Event. Upon the occurrence of a Tax Event and redemption of
the Membership Interest by the Operating Company in accordance with Section 10.8
of the Amended LLC Agreement, Buyer shall have no further obligation to make
Fixed Deferred Payments, Variable Deferred Payments or payments under the Base
Note, other than any such payments that are due and payable at the time of such
redemption but which have not been paid in full.

        2.8     Payments. All payments to be made pursuant to this Article 2
shall be made by wire transfer of immediately available funds to an Account of
Seller.

        2.9     Execution and Closing.

                (a)     The execution of this Agreement and the deliveries set
forth in Section 2.10 will take place (i) at the offices of Jones Day in
Washington, D.C., at 10:00 a.m., local time, on the date hereof or (ii) at such
other place and time as Buyer, Seller and MHSI may agree in writing (the
"Execution Date"). The Parties agree that their respective rights and
obligations hereunder and under the documents delivered pursuant to Section
2.10(a) and Section 2.10(b) shall not take effect until the Closing Date, that
such documents will be held in escrow from the Execution Date to the Closing
Date by Jones Day and released only pursuant to joint instructions of MHSI and
Buyer, and that such documents shall be of no force and effect until the Closing
is consummated.

                                        8

<PAGE>

                (b)     Subject to Section 2.9(c) below, the Closing will take
place within 30 days after receipt from the IRS of an additional private letter
ruling (the "Private Letter Ruling") containing the following rulings:

                        (i)     the Operating Company, using the Covol 298-1
reagent, will produce a "qualified fuel" within the meaning of Section
29(c)(1)(C) of the Code;

                        (ii)    production of qualified fuel at the Facilities
will be attributable solely to the Operating Company, entitling the Operating
Company to the Tax Credit on such fuel sold to unrelated parties; and

                        (iii)   the Tax Credit may be passed through to and
allocated among the members of the Operating Company (which shall be defined in
the Private Letter Ruling as MHSI, Buyer and Seller), in accordance with each
member's interest in the Operating Company when the Tax Credit arises, which is
determined based on a valid allocation of the receipts from the sale of the
qualified fuel.

                (c)     Buyer shall not be obligated to consummate the Closing
if the Private Letter Ruling is not issued by July 31, 2003 or if, at the time
the requirements of Section 2.9(b) are satisfied, either (i) a Tax Event has
occurred; (ii) MHSI and Seller have not funded the Operating Company fully for
the period up to and including the Closing Date; (iii) Seller or MHSI has not
performed any of the covenants the Seller or MHSI is required to perform between
the Execution Date and the Closing Date under this Agreement or any other
Transaction Document, or there is a material breach of a representation and
warranty set forth in Section 3.3(p) and such failure or breach, in the written
opinion of Chadbourne & Parke LLP (or other nationally recognized tax counsel)
should have a materially adverse effect on Buyer's ability to claim Tax Credits,
or (iv) the Private Letter Ruling contains (or fails to contain) language the
presence (or absence) of which in the written opinion of Chadbourne & Parke LLP
(or other nationally recognized tax counsel) should have a materially adverse
effect on Buyer's ability to claim Tax Credits or (v) there shall be revealed or
there shall have occurred a circumstance or an event that, in Buyer's reasonable
judgment, results in, or at the Closing Date would result in (A) a material
breach of a representation and warranty set forth in Section 3.3(i), (B) a
breach of a representation and warranty set forth in Section 3.1(b) of this
Agreement, (C) a tort claim against the Operating Company that could reasonably
be expected to result in a liability to the Operating Company in excess of $5
million or (D) a casualty to any of the Facilities that has a material adverse
effect on the capacity of the Facilities to produce synthetic fuel qualifying
for Tax Credits, and in any such case (A)-(D), Seller and MHSI have not, within
ninety (90) days of such revelation or occurrence, cured or corrected such
circumstance or event.

                (d)     On the Closing Date, Seller and MHSI each shall deliver
to Buyer an officer's certificate of an Authorized Officer certifying that each
of the representations and warranties set forth in Sections 3.1, 3.2 and 3.3 of
this Agreement is true and correct in all material respects as of the Closing
Date; provided that if MHSI is not able to deliver such certificate, Buyer shall
not be obligated to consummate the Closing only if the circumstances preventing
the delivery of such certificate should in the written opinion of Chadbourne &
Parke LLP (or other nationally recognized tax counsel) have a materially adverse
effect on Buyer's ability to claim Tax Credits.

                                        9

<PAGE>

                (e)     On the Closing Date, Seller shall deliver to Buyer a
bring-down opinion of internal and outside counsels to MHSI and Seller
addressing the matters set forth in Section 2.10(b)(ii), (iii) and (iv), which
opinions shall be in form and substance satisfactory to Buyer.

        2.10    Actions to Occur on the Execution Date.

                (a)     On the Execution Date, Buyer shall deliver or cause to
be delivered to Seller the following:

                        (i)     a certificate of incumbency from the secretary
or an assistant secretary of Buyer as to the officers of Buyer who sign the
Transaction Documents on behalf of Buyer; and a certificate of incumbency from
the secretary or assistant secretary of Buyer Parent as to the officers of Buyer
Parent who sign the Buyer Guaranty on behalf of Buyer Parent;

                        (ii)    a legal opinion of internal counsel to Buyer, in
form and substance satisfactory to Seller, to the effect that (1) each of the
Buyer and the Buyer Parent has been duly formed and is validly existing and in
good standing under the laws of the jurisdiction in which such corporation or
legal entity was formed; (2) each of the Buyer and Buyer Parent has all entity
power and authority to enter into and perform the transactions contemplated by
the Transaction Documents; (3) each of the Transaction Documents to which Buyer
and Buyer Parent is a party has been authorized by all necessary entity action
and has been duly executed and delivered by such entity, and (4) the execution
and delivery of the Transaction Documents to which Buyer and Buyer Parent are a
party do not and will not violate such entity's constitutive documents;

                        (iii)   a legal opinion of Chadbourne & Parke LLP,
outside counsel to Buyer, in form and substance satisfactory to Seller, to the
effect that (1) each of the Transaction Documents to which Buyer and Buyer
Parent is a party constitutes the valid and binding obligation of such entity
enforceable against such entity in accordance with its terms, except as may be
limited or otherwise affected by (I) bankruptcy, insolvency, reorganization,
moratorium, fraudulent conveyance or other laws affecting the rights of
creditors generally and (II) principles of equity, whether considered at law or
in equity; and (2) no filing with, notice to, or consent, approval,
authorization or order of any court or government agency or body or official is
required by federal or applicable state law to be obtained in connection with
the execution, delivery and performance by Buyer or the Buyer Parent of the
Transaction Documents to which it is a party.

                        (iv)    the Buyer Parent Guarantee, duly executed by
Buyer Parent;

                        (v)     the Buyer Security Agreement, duly executed by
Buyer;

                        (vi)    the Amended LLC Agreement, duly executed by
Buyer;

                        (vii)   the Assignment Agreement, duly executed by
Buyer; and

                        (viii)  the Base Note, duly executed by Buyer.

                                       10

<PAGE>

                (b)     On the Execution Date, Seller shall deliver or cause to
be delivered to Buyer the following:

                        (i)     a certificate of incumbency from the secretary
or assistant secretary of Seller as to the officers of Seller who sign the
Transaction Documents on behalf of such Seller; and a certificate of incumbency
from the secretary or an assistant secretary of Seller Parent as to the officers
of Seller Parent who sign the Seller Parent Guaranty on behalf of Seller Parent;
and a certificate of incumbency from the secretary or an assistant secretary of
MHSI as to the officers of MHSI who sign the Transaction Documents on behalf of
MHSI;

                        (ii)    a legal opinion of internal counsel to MHSI and
Seller Parent, in form and substance satisfactory to Buyer, to the effect that
(1) each of MHSI and the Seller Parent has been duly formed and is validly
existing and in good standing under the laws of the jurisdiction in which such
corporation or legal entity was formed; (2) each of MHSI and the Seller Parent
has all entity power and authority to enter into and perform the transactions
contemplated by the Transaction Documents to which it is a party; (3) each of
the Transaction Documents to which MHSI or the Seller Parent is a party has been
authorized by all necessary entity action and has been duly executed and
delivered by such entity; and (4) the execution and delivery of the Transaction
Documents to which MHSI and Seller Parent are a party do not and will not
violate such entity's constitutive documents.

                        (iii)   a legal opinion of Stoel Rives LLP, in form and
substance satisfactory to Buyer, to the effect that (1) Seller has been duly
formed and is validly existing and in good standing under the laws of the State
of Oregon; (2) Seller has all entity power and authority to enter into and
perform the transactions contemplated by the Transaction Documents to which it
is a party; (3) each of the Transaction Documents to which Seller is a party has
been authorized by all necessary entity action and has been duly executed and
delivered by such entity; (4) the execution and delivery of the Transaction
Documents to which Seller is a party do not and will not violate Seller's
constitutive documents; and (5) Seller was retroactively reinstated under Oregon
law on December 16, 2002 and the Company was retroactively reinstated under
Oregon law on December 18, 2002.

                        (iv)    a legal opinion of Jones Day, outside counsel to
MHSI, Operating Company and Seller, in form and substance satisfactory to Buyer,
to the effect that (1) the Operating Company has been duly formed in Delaware
and is validly existing and in good standing under the laws of Delaware; (2) the
Operating Company has all limited liability company power and authority to enter
into and perform the transactions contemplated by the Transaction Documents to
which it is a party; (3) each of the Transaction Documents to which Seller, the
Operating Company, MHSI or the Seller Parent is a party constitutes the valid
and binding obligation of such entity enforceable against such entity in
accordance with its terms, except as may be limited or otherwise affected by (I)
bankruptcy, insolvency, reorganization, moratorium, fraudulent conveyance or
other laws affecting the rights of creditors generally and (II) principles of
equity, whether considered at law or in equity; and (4) no filing with, notice
to, or consent, approval, authorization or order of any court or government
agency or body or official is required by federal or applicable state law to be
obtained in connection with the execution, delivery and performance by Seller,
the Operating Company, MHSI or the Seller Parent of the Transaction Documents to
which it is a party;

                                       11

<PAGE>

                        (v)     all consents, waivers or approvals required to
be obtained by Seller with respect to the sale of the Membership Interest by
Seller contemplated herein and the consummation of the transactions related to
such sale of Membership Interest;

                        (vi)    an affidavit of nonforeign status that complies
with Section 1445 of the Code, duly executed by Seller;

                        (vii)   the Amended LLC Agreement, duly executed by
Seller and MHSI;

                        (viii)  the Assignment Agreement, duly executed by
Seller;

                        (ix)    the Seller Guarantee, duly executed by Seller
Parent in favor of Buyer; and

                        (x)     the Seller Security Agreement, duly executed by
MHSI.

        2.11    First Quarterly Payment Date. For purposes of the Fixed Deferred
Payments it is assumed that the first Quarterly Payment Date following the
Closing Date will be the Quarterly Payment Date in respect of the Quarter ending
August 31, 2003. If this assumption turns out to be incorrect, the payment
schedule for the Fixed Deferred Payments shall be adjusted to reflect that.

                                    ARTICLE 3
                         REPRESENTATIONS AND WARRANTIES

        3.1     Representations and Warranties Regarding Seller, MHSI and the
Operating Company. Seller and MHSI represent and warrant to Buyer both as of the
Execution Date and the Closing Date as follows (with the understanding that
Buyer is relying on such representations and warranties in entering into and
performing this Agreement):

                (a)     Organization, Good Standing, Etc. (i) each of Seller and
MHSI is a corporation duly incorporated, validly existing and in good standing
under the laws of the state of its incorporation, and has all requisite
corporate power and authority to own, lease and operate its properties and to
carry on its business as now being conducted; (ii) the Operating Company is a
limited liability company duly organized, validly existing and in good standing
under the laws of the State of Delaware, and has all requisite limited liability
company power and authority to own, lease and operate its properties and to
carry on its business as now being conducted. The Operating Company is qualified
to do business and in good standing under the laws of each jurisdiction in which
the character of the Subject Assets owned or leased by that company or the
nature of the activities conducted by it in operating its businesses makes such
qualification necessary under law. Attached hereto as Schedule 3.1(a) are
complete and correct copies of the certificate of formation and the limited
liability company operating agreement of the Operating Company, and all
amendments thereto.

                (b)     Ownership. Seller and MHSI are members of the Operating
Company, with Seller owning 49.9 percent of all of the outstanding membership
interests of the Operating Company and MHSI owning 50 percent of all of the
outstanding membership interests of the Operating Company. Except with respect
to the transactions contemplated by this Agreement

                                       12

<PAGE>

and the SynAmerica I Purchase Agreement, Seller is not a party to any agreement,
arrangement or understanding relating to the sale or disposition of all or any
part of the membership interest of the Operating Company or the sale or
disposition of all or any part of the membership interests in Seller as of the
date hereof, nor is Seller in discussions with any Person with respect to the
foregoing. On the date hereof Seller has, and immediately prior to the Closing
of this Agreement Seller will have, absolute record and beneficial ownership and
title to a 49.9 percent membership interest in the Operating Company free and
clear of any liens or other encumbrances except for the obligations imposed on
members of the Operating Company under its operating agreement. There are no
outstanding options, warrants, calls, puts, convertible securities or other
contracts of any nature to which the Operating Company is bound obligating it to
issue, deliver or sell, or cause to be issued, delivered or sold, membership
interests or any securities or obligations convertible into or exchangeable for
membership interests or to grant, extend or enter into any such option, warrant,
call, put, convertible security or other contract.

                (c)     Subsidiaries, Etc. The Operating Company has no direct
or indirect ownership interest in any corporation, limited liability company,
partnership, joint venture or other firm or entity nor any contractual
obligation or commitment to make any investment in (by way of contributions,
advances, loans or otherwise) to any other Person or to provide guarantees of,
or credit support relating to any third-party debt.

                (d)     Authority. Each of Seller and MHSI has all requisite
corporate power and authority to enter into this Agreement and the other
Transaction Documents to which it is a party, to perform its obligations
hereunder and thereunder, and to consummate the transactions contemplated hereby
or thereby. The execution and delivery by each of Seller and MHSI of this
Agreement and the Transaction Documents to which it is a party, the performance
by it of its obligations hereunder and thereunder, and the consummation by it of
the transactions contemplated hereby or thereby, have been duly authorized by
all necessary corporate action on the part of Seller and MHSI. This Agreement
has been duly executed and delivered by each of Seller and MHSI, and upon the
execution and delivery by it of the other Transaction Documents to which it is a
party, the Transaction Documents will be duly executed and delivered by Seller
and MHSI. This Agreement (assuming due authorization, execution and delivery by
Buyer) constitutes, and upon execution and delivery by each of Seller and MHSI
of the other Transactions Documents to which it is a party, the Transaction
Documents will constitute, the valid and binding obligations of each of Seller
and MHSI, enforceable against it in accordance with their terms, subject as to
enforceability to applicable bankruptcy, insolvency, reorganization, moratorium
and similar laws affecting enforcement of creditors' rights and remedies
generally and to general principles of equity (regardless of whether enforcement
is sought in a proceeding at law or in equity).

                (e)     No Conflict; Required Filings and Consents. The
execution and delivery by each of Seller and MHSI of this Agreement and the
other Transaction Documents to which it is a party do not, the performance by it
of its obligations hereunder and thereunder, and the consummation by it of the
transactions contemplated hereby or thereby will not, (i) violate, conflict
with, or result in any breach of any provision of its or the Operating Company's
certificate of formation, articles of incorporation, articles of organization,
bylaws, limited liability company operating agreement or other organizational
documents, (ii) violate, conflict with, or result in a violation or breach of,
or constitute a default (with or without due notice or

                                       13

<PAGE>

lapse of time or both) under, or permit the termination of, or result in the
acceleration of, or entitle any Person to accelerate any obligation, or result
in the loss of any benefit, or give any Person the right to require any security
to be repurchased, or give rise to the creation of any Lien upon the Membership
Interest or any Subject Asset, or affect its or the Operating Company's rights
under any of the terms, conditions, or provisions of any loan or credit
agreement, note, bond, mortgage, indenture, or deed of trust, or any license,
lease, agreement, or other instrument or obligation to which such entity is a
party or by which or to which it or the Operating Company or any of their
respective assets, the Membership Interest or the Subject Assets may be bound or
subject, or (iii) violate any Applicable Law. Except as disclosed on Schedule
3.1(e), no Consent of any Governmental Authority or other Person is necessary or
required with respect to Seller, MHSI or the Operating Company in connection
with the execution and delivery by Seller and MHSI of this Agreement or any of
the other Transaction Documents to which Seller or MHSI is a party, the
performance by Seller or MHSI of its obligations hereunder and thereunder, or
the consummation by Seller or MHSI of the transactions contemplated hereby or
thereby, except for any such Consent that is routine or ministerial in nature.

                (f)     Absence of Litigation. There is no claim, action, suit,
inquiry, judicial or administrative proceeding, grievance, or arbitration
pending or, to the Knowledge of Marriott, threatened against any Seller Party
that seeks to restrain, prohibit, or otherwise enjoin this Agreement or the
consummation of the transactions contemplated hereby.

                (g)     Broker's Fees. Except for broker's fees to be paid by
MHSI to Meridian Investments, Inc., a Massachusetts corporation, no agent,
broker, investment banker, or other Person engaged by any Seller Party is or
will be entitled to any broker's or finder's fee or any other commission or
similar fee payable by Buyer or the Operating Company in connection with any of
the transactions contemplated by this Agreement.

        3.2     Representations and Warranties Regarding the Operating Companies
- Historical. Attached hereto as Schedule 3.2 are the "Representations and
Warranties Regarding the Companies" that PacifiCorp made to Marriott in Section
3.2 of the PacifiCorp/Marriott Agreement (the "Historical Representations and
Warranties"). For the period up to October 15, 2001 (but not thereafter), Seller
and MHSI hereby repeat and incorporate herein by this reference as
representations and warranties of Seller and MHSI both as of the Execution Date
and the Closing Date the Historical Representations and Warranties. The sole
liability of Seller and MHSI with respect to this Section 3.2 is as set forth in
Section 7.10 hereof.

        3.3     Representations and Warranties Regarding the Operating Company.
The representations and warranties set forth in this Section 3.3 and the
Schedules with respect thereto have effect only for, and relate only to, the
period commencing October 15, 2001.

                Seller and MHSI represent and warrant to Buyer both as of the
Execution Date and the Closing Date as follows (with the understanding that
Buyer is relying on such representations and warranties in entering into and
performing this Agreement):

                (a)     Financial Statements; Undisclosed Liabilities; Absence
of Certain Changes or Events.

                                       14

<PAGE>

                        (i)     Attached as Exhibit J is the balance sheet of
        the Operating Company as of November 29, 2002 (the "Balance Sheet"), and
        the statements of income of the Operating Company for the fiscal year to
        such date (such financial statements collectively referred to as the
        "Financial Statements"). The Financial Statements have been prepared in
        accordance with GAAP and fairly present the information purported to be
        presented therein as of such date and for the periods to such date.

                        (ii)    There is no liability or obligation of any kind,
        whether accrued, absolute, fixed, contingent (as such term is defined
        under FASB Statements of Financial Accounting Standards No. 5), or
        otherwise, of the Operating Company for the period since October 15,
        2001 that is not disclosed or reserved against in the Balance Sheet as
        of November 29, 2002 (the "Balance Sheet Date"), other than liabilities
        and obligations incurred in the Ordinary Course of Business since the
        Balance Sheet Date that do not impose any material liability on the
        Operating Company. No facts or circumstances exist that, with or without
        the passing of time or the giving of notice or both, might reasonably
        serve as the basis for any such liabilities not covered by the exception
        in the foregoing sentence.

                        (iii)   Since the Balance Sheet Date, the Operating
        Company has conducted its business only in the Ordinary Course of
        Business. Since the Balance Sheet Date, no material adverse change has
        occurred to the business, the assets or the financial condition or
        prospects of the Operating Company. As of the date hereof, the Operating
        Company does not have any liabilities of any nature, whether accrued,
        absolute, contingent or otherwise (including, without limitation,
        liabilities as guarantor or otherwise with respect to obligation of
        others, or liabilities for taxes due or then accrued or to become due or
        contingent or potential liabilities relating to activities of the
        Company or the conduct of its business) (collectively "Liabilities"),
        except: (i) Liabilities reflected in the Financial Statements, (ii)
        Liabilities incurred in the ordinary course of business of the Company
        since the Balance Sheet Date which singly or in the aggregate do not
        have a Material Adverse Effect on the condition (financial or
        otherwise), properties, assets, liabilities, business or operations of
        the Company, and (iii) as set forth on Schedule 3.3(a) attached hereto.

                (b)     Compliance with Applicable Laws; Permits. Except as
regards Taxes, which are the subject of Section 3.3(j), since October 15, 2001,
the Operating Company has complied in all material respects with, the Operating
Company has not received any notices of any violation of, and the Subject Assets
of the Operating Company have been in compliance in all material respects with,
all Applicable Laws. Except as listed on Schedule 3.3(b) there are no material
permits, approvals, registrations, licenses, legal notifications,
authorizations, exemptions or the like ("Permits") required to be obtained or
filed by the Operating Company under any Applicable Law either to conduct the
business of the Operating Company or otherwise to own or operate the Facilities
or the other Subject Assets. All Permits owned or held by the Operating Company
to conduct its businesses or otherwise to own and operate the Facilities and the
other Subject Assets are listed or described on Schedule 3.3(b). All such
Permits are in full force and effect, the Operating Company is and has been in
compliance in all material respects with such Permits, and, to the Operating
Company's Knowledge, there are no conditions which, with the

                                       15

<PAGE>

passage of time or the giving of notice or both, would give rise to a material
breach or default by the Operating Company under any thereof.

                (c)     Absence of Litigation. Since October 15, 2001, except as
set forth on Schedule 3.3(c) there is no claim, action, suit, inquiry, judicial,
or administrative proceeding, grievance, or arbitration that has been formally
asserted or filed or, to the Knowledge of Marriott, threatened against the
Operating Company or any of the Subject Assets or that questions the validity of
the Transaction Documents or that seeks to delay, prevent or alter the
consummation of any of the transactions contemplated hereby and thereby; nor
have there been any investigations relating to the Operating Company or any of
the Subject Assets that have been formally advised to the Operating Company or,
to the Knowledge of Marriott, threatened by any Governmental Authority. Since
October 15, 2001, there are no claims, actions or suits that have been filed by
the Operating Company. Since October 15, 2001, there is no judgment, decree,
injunction, order, determination, award, notice of violation, finding, or letter
of deficiency of any Governmental Authority or arbitrator that has become
outstanding against the Operating Company or any of the Subject Assets.

                (d)     Insurance. Since October 15, 2001, the Operating Company
has been insured against such risks and in such amounts as companies engaged in
a similar business would, in accordance with good business practice, customarily
be insured. Schedule 3.3(d) sets forth a list of all fire, general liability,
malpractice liability, theft, and other forms of insurance and all fidelity and
surety bonds held by or applicable to the Operating Company or the Subject
Assets for the period since October 15, 2001, and except as disclosed on such
Schedule 3.3(d), for the period since October 15, 2001, there is no claim by the
Operating Company pending under any such policies or bonds as to which coverage
has been questioned, denied, or disputed by the underwriters of such policies or
bonds. All premiums due and payable under such policies and bonds since October
15, 2001 have been paid, and except as set forth on Schedule 3.3(d) the
Operating Company is otherwise in compliance in all material respects with the
terms and conditions of such policies and bonds. Since October 15, 2001, no
event has occurred, including the failure by the Operating Company to give any
notice or information or the delivery of any inaccurate or erroneous notice or
information, which materially limits or impairs the rights of the Operating
Company under any such insurance policies. Excluding insurance policies that
have expired and been replaced in the Ordinary Course of Business, except as set
forth on Schedule 3.3(d), no insurance policy held by or applicable to the
Operating Company or the Subject Assets of the Operating Company has been
canceled since October 15, 2001 and, to the Knowledge of Marriott, there is no
threatened termination of such policies and, except as noted on Schedule 3.3(d),
since October 15, 2001, the Operating Company has not received any notice of any
premium increase with respect to such policies. With respect to any period since
October 15, 2001 during which any third-party operator provided material
operational and/or maintenance services to the Facilities, to the Knowledge of
Marriott, such third-party operator acquired or otherwise maintained workmen's
compensation and liability insurance coverage in such amounts as third-party
operators engaged in a similar business would, in accordance with good business
practices, customarily be insured.

                (e)     Owned Real Property. The Operating Company does not own
any real property.

                                       16

<PAGE>

                (f)     Leased Real Property. The Operating Company currently
does not lease or sublease any real property, including any real property
leasehold interests covering office space or industrial sites, other than the
real property leasehold interests described on Schedule 3.3(f). Except as set
forth on Schedule 3.3(f), there is no real property owned or leased by Seller
Parent or one of its Affiliates (other than the Operating Company or SynAmerica
I) that is used or held for use primarily in connection with the Facilities or
the operations of the Operating Company. Each lease listed on Schedule 3.3(f),
if any, is in full force and effect without any amendment. The Operating Company
is not, and, to the Knowledge of Marriott, no other Person is, in default under
any lease listed on Schedule 3.3(f), if any, that could reasonably be expected
to have a Material Adverse Effect. No Consent from any landlord or third party
to any lease listed on Schedule 3.3(f), will be required as a result of the
execution, delivery or performance by the Parties of this Agreement and the
other Transaction Documents. All leasehold interests listed on Schedule 3.3(f)
are available for immediate use as related to the Facilities and the operations
of the Operating Company as currently conducted or as otherwise conducted in the
Ordinary Course of Business, and such leasehold interests listed on Schedule
3.3(f) are adequate for the Operating Company to operate in accordance with its
operations as currently conducted or as otherwise conducted in the Ordinary
Course of Business. Since October 15, 2001, the Operating Company has not
purchased or leased any additional real property. Seller has delivered to Buyer
true and complete copies of all leases listed in Schedule 3.3(f), if any, and
all amendments thereto, prior to the execution of this Agreement. Each such
lease is valid and binding on the Operating Company and, to the Knowledge of
Marriott, on the other parties thereto, and is enforceable in accordance with
the terms thereof, except as enforceability may be limited by bankruptcy,
insolvency, reorganization, moratorium, applicable equitable principles or other
similar laws affecting the enforcement of creditors' rights generally.

                (g)     Personal Property. Schedule 3.3(g) contains a list of
the items of Personal Property having a replacement cost of not less than
$10,000 for each item acquired by the Operating Company since October 15, 2001,
and not since disposed of in the Ordinary Course of Business. Except as set
forth in Schedule 3.3(g), there is no personal property owned or leased by
Seller Guarantor or one of its Affiliates (other than the Operating Company or
SynAmerica I) that has become used or held for use primarily in connection with
the Facilities or the operations of the Operating Company since October 15,
2001. All Personal Property listed on Schedule 3.3(g) is located at the
locations listed on such Schedule 3.3(g). Except as set forth on Schedule
3.3(g), the Operating Company has good and marketable title to, or a valid
leasehold or license interest in, all of the Personal Property listed on such
Schedule. The Operating Company is not, and, to the Knowledge of Marriott, no
other Person is, in default under any of the leases, licenses and other
Contracts relating to the Personal Property listed on such Schedule that could
reasonably be expected to have a Material Adverse Effect. Except as otherwise
disclosed in Schedule 3.3(g), the Personal Property listed on such Schedule (i)
is in good operating condition and repair (ordinary wear and tear excepted),
(ii) is available for immediate use in the operations of the Operating Company
as and where currently conducted, and (iii) is adequate for the Operating
Company to operate in accordance with its operations as and where currently
conducted or as otherwise conducted in the Ordinary Course of Business.

                (h)     Liens. All of the Subject Assets are free and clear of
all liens, pledges, claims, security interests, restrictions, mortgages, deeds
of trust, tenancies, and other possessory interests, conditional sale or other
title retention agreements, assessments, easements, rights of

                                       17

<PAGE>

way, covenants, restrictions, rights of first refusal, defects in title,
encroachments, and other burdens, options or encumbrances of any kind
(collectively, "Liens") except for Permitted Liens.

                (i)     Environmental Matters.

                        (i)     Except as set forth on Schedule 3.3(i)(i), the
        Operating Company, the operations of the Operating Company, and the
        Subject Assets have at all times since October 15, 2001 complied with
        all Environmental Laws, and currently comply with all Environmental
        Laws.

                        (ii)    Since October 15, 2001, except as set forth on
        Schedule 3.3(i)(ii), no judicial or administrative proceedings have been
        filed or, to the Knowledge of Marriott, threatened against the Operating
        Company alleging the violation of any Environmental Laws, or alleging
        any liabilities arising under any Environmental Laws, or otherwise
        requiring the Operating Company to take, or refrain from taking, any
        action in order to comply with any Environmental Laws, and no claims,
        actions or suits have been formally asserted or filed or, to the
        Knowledge of Seller or MHSI, threatened against the Operating Company
        from or related to exposure (or alleged exposure) of Persons or property
        to Hazardous Substances in connection with the operation of the
        Operating Company or the Facilities, and no notice from any Governmental
        Authority or any private or public Person has been received by the
        Operating Company or any other Seller Party or, to the Knowledge of
        Marriott, threatened against the Operating Company or any other Seller
        Party claiming any violation of any Environmental Laws by the Operating
        Company in connection with any real property or facility owned, operated
        or leased by the Operating Company, or claiming any liabilities arising
        under Environmental Laws or requiring any investigation, remediation, or
        monitoring on or in connection with any real property or facility owned,
        operated or leased by the Operating Company or any offsite location that
        may have been impacted by operations of the Operating Company that are
        necessary to comply with any Environmental Laws and that have not been
        fully complied with or otherwise resolved to the full satisfaction of
        the Person giving notice, or that otherwise may reasonably be expected
        to give rise to any liability arising under Environmental Laws.

                        (iii)   Since October 15, 2001, except as set forth on
        Schedule 3.3(i)(iii), the Operating Company possesses, has possessed or
        otherwise holds or has held all Permits required to conduct all of its
        activities, including those activities relating to the generation, use,
        storage, treatment, transport, disposal, release, investigation,
        remediation or monitoring of Hazardous Substances. All such Permits are
        final, in full force and effect, and are not subject to any judicial or
        administrative appeal or other proceedings.

                        (iv)    Since October 15, 2001, all Hazardous Substances
        generated, used, stored, treated, transported, disposed of, arranged for
        transport, arranged for disposal or released (collectively, "Managed")
        by the Operating Company on, in, under or from any of its owned,
        operated, or leased real property or facilities have been Managed by the
        Operating Company in such manner as to be in compliance with
        Environmental Law and not to result in any Environmental Costs or
        Liabilities. To the Knowledge of Marriott, no

                                       18

<PAGE>

        Hazardous Substances exist in or on the Subject Assets except in
        compliance in all material respects with Environmental Laws.

                        (v)     Since October 15, 2001, neither the Operating
        Company nor other Seller Party has received any written notification
        from any source advising the Operating Company or Seller Party that: (A)
        the Operating Company is a potentially responsible party under CERCLA or
        any other Environmental Laws; (B) any real property or facility
        currently or previously owned, operated or leased by the Operating
        Company is identified or proposed for listing as a federal National
        Priorities List ("NPL") (or state-equivalent) site or a Comprehensive
        Environmental Response, Compensation and Liability Information System
        ("CERCLIS") (or state-equivalent) site; and (C) any facility to which
        the Operating Company has ever transported, disposed or otherwise
        arranged for the transport or disposal of Hazardous Substances is
        identified or proposed for listing as an NPL (or state-equivalent) site
        or CERCLIS (or state-equivalent) site.

                        (vi)    Since October 15, 2001, no Hazardous Substance
        has been released or been present in a reportable quantity or quantity
        potentially requiring remedial action or warranting environmental
        investigation, or that could otherwise reasonably be expected to result
        in liability at, on, or under any real property or facility now or
        previously owned, operated or leased by the Operating Company.

                        (vii)   The Operating Company has made available to
        Buyer all environmental site assessment reports, studies, and related
        documents in its possession and relating to the operation, businesses
        and property of the Operating Company and the Facilities.

                (j)     Taxes. The Operating Company has timely filed, or caused
to be timely filed on its behalf, all Tax Returns required to be filed since
October 15, 2001, and has paid, or caused to be paid on its behalf, all Taxes
required to be paid since October 15, 2001. All such Tax Returns are complete
and accurate in all material respects. Waivers of the statute of limitations in
respect of Taxes for which the Operating Company is liable that have been given
to the IRS are listed on Schedule 3.3(j). To Marriott's Knowledge, no other such
waivers have been given or requested.

                (k)     Company Contracts. Schedule 3.3(k) lists all material
(i) lease agreements, easements, right-of-way agreements, partnership, joint
venture or alliance agreements, agreements under which any indebtedness for
borrowed money has been created, incurred, assumed or guaranteed, agreements
with Sellers or any Affiliate of Seller (other than the Operating Company or
SynAmerica I), non-compete agreements, stock option, stock purchase, severance
and similar agreements, employment agreements, collective bargaining agreements,
license agreements, asset purchase agreements, merger agreements, operation and
maintenance agreements, engineering, procurement and construction agreements,
fuel supply agreements, fuel sales agreements, and loan agreements entered into
since October 15, 2001, to which the Operating Company is a party, and (ii) all
other agreements entered into since October 15, 2001 to which the Operating
Company is a party involving payments to, or a liability of, the Operating
Company in excess of $10,000, in each case (A) which agreements are currently in
effect and (B) with respect to such agreements, the Operating Company is a party
thereto or such

                                       19

<PAGE>

agreements bind or are included in the Subject Assets of the Operating Company.
Seller has delivered or made available to Buyer a complete and correct copy of
each such contract or other agreement listed on Schedule 3.3(k) (including all
exhibits and schedules thereto) as in effect on the date hereof. With respect to
each such agreement: (A) the agreement is in full force and effect, valid and
binding on the Operating Company, and, to the Knowledge of Marriott, on the
other parties thereto, and is enforceable in accordance with the terms thereof,
except as enforceability may be limited by bankruptcy, insolvency,
reorganization, moratorium, applicable equitable principles or other similar
laws affecting the enforcement of creditors' rights generally; (B) the agreement
will continue to be in full force and effect on identical terms following the
Closing; (C) the Operating Company is not and, to the Knowledge of Marriott, no
other party under such agreement is, in breach or default, and no event or
circumstance has occurred or exists with respect to the Operating Company or, to
the Knowledge of Marriott, with respect to the other party to such agreement,
which with notice or lapse of time would constitute a breach or default, or
permit termination, modification, or acceleration, under the agreement, in each
case that could reasonably be expected be have a Material Adverse Effect; (D) to
the Knowledge of Marriott, no other party to such agreement has any valid
defense, setoff or counterclaim against the Operating Company under any such
agreement and the Operating Company or any other Seller Party has not received
any notice of any such claim; and (E) the Operating Company has not repudiated
and, except as disclosed on Schedule 3.3(k), does not intend to terminate,
cancel or not renew any provisions of such agreement, and, to Marriott's
Knowledge, no other party to such agreement has repudiated or intends to
terminate, cancel or not renew any provision of such agreement.

                (l)     Employee Matters.

                        (i)     The Operating Company has no employees. Except
as set forth on Schedule 3.3(l), there is not any collective bargaining or
similar agreement with any labor organization relating to the individuals who
currently provide or, since October 15, 2001, have provided services in
connection with the operation of the Facilities including, without limitation,
the delivery of coal feedstock (the "Facility Employees"). None of the Facility
Employees is a common law employee of the Operating Company. With respect to the
Operating Company and Synfuel Management, LLC, Marriott has no Knowledge of,
after due inquiry with Synfuel Management, LLC, (A) any current or planned
employee union or organizing activities; (B) any current or threatened strike,
dispute, slowdown, stoppage or lockout; (C) any unfair labor practice charge or
complaint by any Facility Employee pending before the National Labor Relations
Board or any similar state agency; (D) any charge or investigation pending
before the Equal Employment Opportunity Commission or any other federal or state
entity responsible for the prevention of unlawful employment practices; or (E)
except as disclosed on Schedule 3.3(l)(i), any material violation or notices of
violations of MSHA.

                        (ii)    Since October 15, 2001, the Operating Company
has not maintained, sponsored, administered or participated in any employee
benefit plan, program or arrangement, including without limitation any employee
benefit plan subject to ERISA. To the Knowledge of Marriott the Operating
Company has no outstanding or threatened liability relating to any employee
benefit plan that it maintained, sponsored or administered, or in which it
participated prior to October 15, 2001.

                                       20

<PAGE>

                (m)     Intellectual Property.

                        (i)     Other than the licenses listed on Schedule
3.3(k), the Company does not own or hold under license any material Intellectual
Property.

                        (ii)    Since October 15, 2001, the Operating Company
has not unlawfully interfered with, infringed upon or misappropriated any
Intellectual Property rights of third parties and no third party has unlawfully
interfered with, infringed upon, or misappropriated any Intellectual Property
rights of the Operating Company, except in any such case as could not reasonably
be expected to have a Material Adverse Effect.

                (n)     Powers of Attorney. There are no outstanding powers of
attorney executed by or on behalf of the Operating Company since October 15,
2001.

                (o)     Affiliate Transactions. There are no contracts between
the Operating Company and any other Affiliate of Seller or MHSI.

                (p)     Section 29.

                        (i)     Except as disclosed in the Marston Report or on
Schedule 3.3(p)(i), no material change or modification has been made to the
equipment at the Facilities since October 15, 2001.

                        (ii)    To Marriott's Knowledge, there is no material
misstatement of fact or any material omission of fact in the Request that would
permit the IRS to revoke any of the rulings in the Private Letter Ruling or to
successfully assert in a revenue agent's report or notice of proposed
disallowance that any such ruling does not apply to the Operating Company or
Buyer.

                        (iii)   To Marriott's Knowledge, there is no material
misrepresentation in Section 3.2(k) of the PacifiCorp/Marriott Agreement, or any
material misstatement of fact or material omission of fact in earlier ruling
requests, which would permit the IRS to revoke the earlier IRS letter rulings
issued with respect to the Facilities and the Operating Company or to
successfully assert in a revenue agent's report or notice of proposed
disallowance that any such ruling does not apply to the Operating Company.

                        (iv)    At least 20% of the current fair market value of
the Facilities is attributable to used property (within the meaning of the
private ruling issued to the Operating Company in 1997) retained from the
Facilities at their original sites in Jefferson, Tuscaloosa and Walker Counties,
Alabama.

                        (v)     The Operating Company is classified as a
partnership for federal income tax purposes and not as an association taxable as
a corporation.

                        (vi)    IRS audits of the Operating Company commenced in
January 2000. The Operating Company received the information document requests
from the IRS set forth on Schedule 3.3(p)(vii) and has responded to certain of
these requests, but to Marriott's Knowledge there has been no other written
communication with the IRS about the audit. For

                                       21

<PAGE>

tactical reasons, all contact with the IRS through the end of 2002 has been by
PacifiCorp personnel and not by Marriott or its counsel, and accordingly
Marriott's knowledge of the audits is limited. To Marriott's Knowledge, the IRS
has not indicated an intention to disallow tax credits claimed by PacifiCorp or
advanced any particular theory for such a disallowance.

For purposes of any indemnity relating to, or claim of breach with respect to,
the representations in subsections 3.3(p)(ii) or (iii), Marriott shall not be
treated as having Knowledge of any misstatement, omission or misrepresentation,
and the representations in such subsections shall not be treated as incorrect or
breached, to the extent that the relevant facts were disclosed to Buyer or its
counsel in writing or through documents provided as part of Buyer's due
diligence. For the avoidance of doubt, the parties acknowledge that the items
listed on Schedule 3.3(p)(iv)B were provided to Buyer's counsel in the course of
due diligence. In addition, in the absence of fraud (a remedy which is provided
for in Section 7.1 hereof), the parties acknowledge that Marriott shall not have
Knowledge of any additional facts if such facts are included in the Excluded
Boxes described on Schedule 3.3(p)(iv)A and are not otherwise known to Marriott.

        3.4     Updating of Schedules. For purposes of the representations and
warranties of Seller and MHSI to be made on the Closing Date pursuant to
Sections 3.1, 3.2 and 3.3, the schedules to such representations and warranties
shall be updated through the Closing Date. Buyer shall not be obligated to
consummate the Closing if the schedules, as updated, should in the written
opinion of Chadbourne & Parke LLP (or other nationally recognized tax counsel)
have a materially adverse effect on Buyer's ability to claim Tax Credits.

        3.5     Application of Representations and Warranties to 0.1% Interest.
Seller and MHSI agree that the representations and warranties made in Sections
3.2 and 3.3 also are made as of the Closing Date to Buyer and its predecessors
in interest with respect to the 0.1% interest in the Operating Company
previously acquired by Buyer.

        3.6     Representations and Warranties of Buyer. Buyer represents and
warrants to Seller and MHSI both as of the Execution Date and the Closing Date
as follows (with the understanding that Seller and MHSI are relying on such
representations and warranties in entering into and performing this Agreement):

                (a)     Organization; Good Standing; Etc. Buyer is a limited
liability company duly incorporated, validly existing, and in good standing
under the laws of the State of Delaware, and has all requisite corporate power
and authority to own, lease, and operate its properties and to carry on its
business as now being conducted.

                (b)     Authority. Buyer has all requisite power and authority
as a limited liability company to enter into this Agreement and the other
Transaction Documents to which it is a party, to perform its obligations
hereunder and thereunder, and to consummate the transactions contemplated hereby
and thereby. The execution and delivery by Buyer of this Agreement and the other
Transaction Documents to which it is a party, the performance by it of its
obligations hereunder and thereunder, and the consummation by it of the
transactions contemplated hereby or thereby, have been duly authorized by all
necessary limited liability company action on the part of Buyer. This Agreement
has been duly executed and delivered by Buyer, and upon execution and delivery
by it of the other Transaction Documents to which it is a

                                       22

<PAGE>

party, the other Transaction Documents will be duly executed and delivered by
Buyer. This Agreement (assuming due authorization, execution and delivery by
Seller and MHSI) constitutes, and upon execution and delivery by Buyer of the
other Transaction Documents to which it is a party, the other Transaction
Documents will constitute, the valid and binding obligations of Buyer,
enforceable against it in accordance with their terms, subject as to
enforceability to applicable bankruptcy, insolvency, reorganization, moratorium,
and similar laws affecting enforcement of creditors' rights and remedies
generally and to general principles of equity (regardless of whether enforcement
is sought in a proceeding at law or in equity).

                (c)     No Conflict; Required Filings and Consents. The
execution and delivery by Buyer of this Agreement and the other Transaction
Documents to which it is a party do not, the performance by it of its
obligations hereunder and thereunder, and the consummation by Buyer of the
transactions contemplated hereby or thereby will not (i) violate, conflict with,
or result in any breach of any provisions of its certificate of formation or
limited liability company operating agreement, (ii) violate, conflict with, or
result in a violation or breach of, or constitute a default (with or without due
notice or lapse of time or both) under, or permit the termination of, or result
in the acceleration of, or entitle any Person to accelerate any obligation, or
result in the loss of any benefit, or give any Person the right to require any
security to be repurchased, or give rise to the creation of any Lien upon any of
its assets under, any of the terms, conditions, or provisions of any loan or
credit agreement, note, bond, mortgage, indenture, or deed of trust, or any
license, lease, agreement, or other instrument or obligation to which Buyer is a
party or by which or to which it or any of its assets may be bound or subject,
or (iii) violate any Applicable Law; except in the case of clauses (ii) and
(iii) of this Section 3.4(c) for any such violations, conflicts, breaches,
defaults, rights of termination, cancellation or acceleration, loss of benefits,
repurchase rights, Liens or effects that would not adversely affect the ability
of Buyer to consummate the transactions contemplated by this Agreement. No
Consent of any Governmental Authority is required by or with respect to Buyer in
connection with the execution and delivery by Buyer of this Agreement or any of
the other Transaction Documents to which Buyer is a party, the performance by
Buyer of its obligations hereunder and thereunder, or the consummation by Buyer
of the transactions contemplated hereby or thereby, except for any such Consent
that is routine or ministerial in nature.

                (d)     Absence of Litigation. There is no claim, action, suit,
inquiry, judicial or administrative proceeding, grievance, or arbitration
pending or, to the knowledge of Buyer, threatened against Buyer or any of its
Affiliates that seeks to restrain, prohibit, or otherwise enjoin this Agreement
or the consummation of the transactions contemplated hereby.

                (e)     Broker's Fee. No agent, broker, investment banker, or
other Person engaged by Buyer or any of its Affiliates will be entitled to any
broker's or finder's fee or any other commission or similar fee payable by any
Seller Party in connection with any of the transactions contemplated by this
Agreement.

                                    ARTICLE 4
                                CERTAIN COVENANTS

        4.1     Conduct of Operations. During the period from the Execution Date
to the Closing, Seller and MHSI shall cause the Operating Company to (i) conduct
its operations in the

                                       23

<PAGE>

Ordinary Course of Business (including the paying of all premiums due and
payable under, and the taking of all actions necessary to maintain, all
insurance policies and bonds described in Section 3.3(d)) and in compliance in
all material respects with Applicable Laws (including Environmental Laws), (ii)
cause tests for significant chemical change to be conducted in accordance with
the testing protocol set forth on Schedule 4.1, (iii) not produce during any
Quarter at a level exceeding the Quarterly Maximum Production, (iv) cause the
Facilities to be maintained in good condition and in accordance with Prudent
Operating Standards, (v) cause the Facilities to be operated in all material
respects consistently with the statement of facts in the Request, (vi) not
terminate or amend in any material respect any real property leases and (vii)
not instruct or permit the Manager to replace, change or modify any of the
equipment at the Facilities, except for the following changes: (a) the
replacement of parts with substantially identical parts; (b) the replacement or
addition of electrical components (excluding motor drives), meters, scales,
sampling and testing, programmable logic controller or other measuring equipment
to improve quality control; (c) the replacement of front-end loaders, vehicles
and other similarly mobile equipment (it being agreed that the Facilities
themselves are not "mobile equipment" for this purpose) or (d) the addition,
replacement or modification of equipment for the purpose of safety or
occupational health improvements.

        4.2     Existing Accounts Payable. To the extent not funded prior to the
Closing Date, MHSI shall be responsible for funding working capital requirements
of the Operating Company that relate specifically to accounts payable accruing
prior to the Closing Date.

        4.3     Independent Engineer. MHSI acknowledges that Buyer has engaged
the Independent Engineer to assist it in monitoring its investment in the
Company and compliance with this Agreement and to advise it as to matters
requiring the consent of or Consultation with Buyer hereunder or under the
Amended LLC Agreement. In particular, MHSI acknowledges that the Independent
Engineer may visit the Facilities during normal business hours prior to each
Quarterly Payment Date. MHSI will ask the Manager and Independent Chemist to
cooperate with the Independent Engineer and to provide the Independent Engineer
with reasonable access to all data and personnel to the extent that providing
such access and data is reasonably related to such purposes and does not
materially interfere with the operation of the Facilities or the business and
operations of MHSI or the Company. Additionally, every day during which the
Facilities are operational, MHSI shall ask the Manager to provide the
Independent Engineer a Daily Production Report. MHSI shall also ask the Manager
to provide the Independent Engineer any notices of MSHA violations, corrections
or notices of state or federal inspection at the Facilities that indicate a
deficiency or violation when they are received, as well as any chemical change
reports that do not indicate that the coal feedstock used at the Facilities to
create synthetic fuel underwent a significant chemical change.

                                    ARTICLE 5
                                   TAX MATTERS

        5.1     Tax Returns and Proceedings.

                (a)     MHSI shall cause the Operating Company to prepare and
file all Tax Returns when due and all reports related to the Operating Company
that are required to be filed or furnished with respect to all taxable periods
ending on or before the Closing Date. For taxable

                                       24

<PAGE>

periods ending after the Closing Date, MHSI shall (in its capacity as
Administrative Member) cause all such returns and reports to be filed in
accordance with the Amended LLC Agreement. The parties shall cooperate with
respect to the preparation and filing of all such returns and reports.

                (b)     Subject to any additional obligations or covenants
provided under the Amended LLC Agreement, Buyer, on the one hand, and MHSI, on
the other hand, shall provide the other with such assistance as may reasonably
be requested by the other Party in connection with the preparation of any Tax
Return, any audit or other examination by any taxing authority, or any judicial
or administrative proceedings relating to the liability for any Taxes with
respect to the operations of the Operating Company or the allowance or
disallowance of any Tax Credits arising from the sale by the Operating Company
of solid synthetic fuel produced in the Facilities, and each shall retain (until
the expiration of the applicable statute of limitations) and provide the
requesting Party with any records or information that may be relevant to such
Tax Return, audit or examination or proceedings. Any information obtained under
this section or under any other section hereof providing for the sharing of
information or review of any Tax Return will be kept confidential by the
Parties; provided that such information may be provided to the applicable tax
authorities. Each Party shall provide timely notice to the other in writing of
any pending or threatened Tax audits or assessments of which such Party is aware
relating to the liability for any Taxes with respect to the operations of the
Operating Company or the allowance or disallowance of any Tax Credits arising
from the sale by the Operating Company of solid synthetic fuel produced in the
Facilities.

                (c)     MHSI shall cause the Operating Company to make an
election under Section 754 of the Code for the taxable year of the Operating
Company which includes the sale of the Membership Interest contemplated hereby.

        5.2     Transaction Taxes. Any real property transfer or gains tax,
sales tax, use tax, stamp tax, stock transfer tax or other similar tax,
including any penalties, interest and additions to tax imposed by reason of the
transactions contemplated by this Agreement to occur at the Closing shall be
borne by Seller.

        5.3     Private Letter Ruling.

                (a)     The Parties shall exercise commercially reasonable
efforts to cause the Operating Company to submit the additional ruling request
substantially in the form attached hereto as Exhibit D ("Request") as promptly
as possible following the Execution Date.

                (b)     The Parties shall cause the Company to (i) inform Buyer
and its counsel in a timely manner of all material developments in the private
letter ruling process, including all communications related thereto to and from
the IRS; (ii) provide Buyer and its counsel with a draft copy of any supplements
to the Request (including any exhibits or attachments thereto) and of any other
written communication related thereto proposed to be submitted to the IRS for
its review and comment at least five Business Days prior to submission; (iii)
incorporate all reasonable changes and comments to such supplements as may be
requested by Buyer or its counsel, (iv) provide Buyer and its counsel with
notice reasonably in advance of any meetings or conferences (including
telephonic meetings or conferences) with the IRS with respect to the

                                       25

<PAGE>

Request and arrange with the IRS to permit Buyer and its counsel to participate
in any such meetings or conferences (including signing any necessary IRS forms),
and (v) consult with Buyer and its counsel regarding potential withdrawal of any
parts of the Request on which the IRS indicates it remains adverse after a
conference of right if the IRS indicates that it does not intend to grant the
Private Letter Ruling.

                (c)     The Parties agree that, should either of their
respective tax counsels recommend changes to the Transaction Documents as
required by the IRS to obtain the Private Letter Ruling, the Parties will
cooperate and negotiate in good faith to attempt to reach agreement to amend the
Transaction Documents to the extent necessary to obtain the Private Letter
Ruling.

                                    ARTICLE 6
                                   TERMINATION

        6.1     Termination. Without limiting Seller's, MHSI's or Buyer's
ability to exercise any right or remedy to which it is entitled hereunder or
under any of the Transaction Documents, except as otherwise provided herein,
this Agreement may be terminated as provided in this Section 6.1.

                (a)     If Buyer or Buyer Parent fails to pay in full any
portion of the Purchase Price that is due and payable under Article 2 on the
date such payment is due under Article 2 (such failure not being due to a
deferral of the Fixed Deferred Payment pursuant to Section 2.6 or deferral under
the Base Note), and such failure continues for 20 days after Buyer and Buyer
Parent receive written notice of such failure from MHSI, then MHSI shall have
the option, exercisable by delivery of written notice thereof to Buyer within
180 days following Buyer's receipt of the notice of default so long as such
default is continuing at such time of exercise, to terminate this Agreement and
cause the Membership Interest to be redeemed by the Operating Company. If MHSI
exercises such option, this Agreement shall terminate and (i) Buyer shall
reconvey and transfer to the Operating Company all right, title and interest in
and to the Membership Interest, free and clear of all Liens other than the
obligations and liabilities under Transaction Documents with respect thereto;
(ii) Buyer will be deemed to have made the written representations set forth on
Exhibit D to the Amended LLC Agreement to Seller, MHSI and the Operating
Company; (iii) Buyer shall take all such further actions and execute,
acknowledge and deliver all such further documents that are necessary or useful
to effectuate the transfer of the Membership Interest contemplated by this
Section 6.1(a); (iv) the Operating Company shall effectuate such redemption; (v)
all obligations and liabilities associated with the Membership Interest will
terminate except those obligations and liabilities accrued through the date of
termination or relating to any taxable year or portion thereof prior to such
date; (vi) Buyer will have no further rights as a member of the Operating
Company; (vii) the Amended LLC Agreement shall be amended to reflect Buyer's
resignation as a member of the Operating Company; and (viii) Buyer shall have no
further obligation thereafter to make any Fixed Deferred Payments, Variable
Deferred Payments, payments under the Base Note or contributions to the capital
of the Operating Company pursuant to the Amended LLC Agreement, except those
obligations and liabilities accrued through the date of termination. Relief from
the obligation of Buyer to make such payments will be deemed sufficient
consideration for the reconveyance and transfer of the Membership Interest to
the Operating Company.

                                       26

<PAGE>

                (b)     If Buyer delivers to the Operating Company and to MHSI a
Termination Notice on or before December 31, 2003, then on the Termination Date
(or on December 31, 2003, if MHSI has elected pursuant to Section 2.5(g) to
require Buyer to remain as a partner in the Operating Company until such date),
this Agreement shall terminate and (i) Buyer shall convey and transfer to MHSI
all right, title and interest in and to the Membership Interest free and clear
of all Liens other than the obligations and liabilities under Transaction
Documents with respect thereto; (ii) Buyer will be deemed to have made the
written representations set forth on Exhibit D to the Amended LLC Agreement to
MHSI; (iii) Buyer shall take all such further actions and execute, acknowledge
and deliver all such further documents that are necessary or useful to
effectuate such conveyance and transfer; (iv) all obligations and liabilities of
Buyer associated with the Membership Interest will terminate except those
obligations and liabilities accrued through the date of termination or relating
to any taxable year or portion thereof prior to such date; (v) Buyer will have
no further rights as a member of the Operating Company; (vi) the Amended LLC
Agreement shall be amended to reflect such conveyance and transfer; and (vii)
Buyer shall have no obligation thereafter to make any Fixed Deferred Payments,
Variable Deferred Payments, payments under the Base Note or contributions to the
capital of the Operating Company pursuant to the Amended LLC Agreement, except
those obligations and liabilities accrued through the date of termination.

                (c)     If the Membership Interest held by Buyer is redeemed
pursuant to Section 4.4 or Section 10.8 of the Amended LLC Agreement or if the
action with respect to the "the Collateral" referred to in Section 3.10 of the
Amended LLC Agreement is taken, then this Agreement shall terminate, and Buyer
shall have no further obligation to make any Fixed Deferred Payments, Variable
Deferred Payments, payments under the Base Note or any other obligations under
Article 2, except for those obligations and liabilities accrued through the date
of such termination.

                (d)     If the Closing has not been consummated by the close of
business on August 31, 2003, this Agreement shall automatically terminate,
unless the parties hereto mutually agree to a later termination date.

        6.2     Procedure and Effect of Termination. A termination of this
Agreement under Section 6.1 will not affect the rights of the Parties with
respect to breaches of any agreement, covenant, representation or warranty
contained in this Agreement, except as stated in Section 6.1 with respect to the
obligation of Buyer to make Fixed Deferred Payments, Variable Deferred Payments
or payments under the Base Note.

                                       27

<PAGE>

                                    ARTICLE 7
                                 INDEMNIFICATION

        7.1     Indemnification of Buyer. MHSI agrees, subject to Section 7.10,
to indemnify, defend and hold harmless the Buyer Indemnified Parties from and
against any and all Buyer Indemnified Costs; provided, however, that, except for
events specified in Section 2.9(c)(v) which relate to the period between the
Execution Date and the Closing Date and which have not been remedied (and in
spite of which Buyer elects to proceed with the Closing), MHSI's aggregate
obligation to indemnify the Buyer Indemnified Parties under this Section 7.1 and
Section 7.10 shall not exceed in the aggregate the MHSI Cap, except (a) as to
breaches of the representation in Section 3.3(j) (as to which no cap shall
apply) and (b) as to breaches of representations in subsections (i), (ii),
(iii), (iv) and (v) of Section 3.3(p) or any claim of fraud (as to which such
indemnification obligations shall not exceed in the aggregate 119% of all Tax
Credits allocated to Buyer).

        7.2     Indemnification of Seller. Buyer hereby agrees to indemnify,
defend and hold harmless the Seller Indemnified Parties from and against any and
all Seller Indemnified Costs; provided, however, that in no event shall Buyer's
aggregate obligation to indemnify the Seller Indemnified Parties under this
Section 7.2 exceed installments of Purchase Price and Monthly Capital
Contributions (as defined in the Amended LLC Agreement) required to be paid that
have not been paid at the time the request for indemnity is made.

        7.3     Defense of Third Party Claims. (a) An Indemnified Party shall
give written notice to any Indemnifying Party within 30 days after it has actual
knowledge of commencement or assertion of any action, proceeding, demand, or
claim by a third party (collectively, a "Third Party Claims") in respect of
which such Indemnified Party may seek indemnification under this Article 7. Such
notice shall state the nature and basis of such Third Party Claim and the events
and the amounts thereof to the extent known. Any failure so to notify an
Indemnifying Party shall not relieve such Indemnifying Party from any liability
that it, he, or she may have to such Indemnified Party under this Article 7,
except to the extent the failure to give such notice materially and adversely
prejudices such Indemnifying Party. In case any such action, proceeding or claim
is brought against an Indemnified Party, the Indemnifying Party shall be
entitled to participate in and, unless in the reasonable judgment of the
Indemnified Party a conflict of interest between it and the Indemnifying Party
may exist in respect of such action, proceeding or claim, to assume the defense
thereof, with counsel selected by the Indemnifying Party and reasonably
satisfactory to the Indemnified Party, and after notice from the Indemnifying
Party to the Indemnified Party of its election so to assume the defense thereof,
the Indemnifying Party shall not be liable to such Indemnified Party for any
legal or other expenses subsequently incurred by the latter in connection with
the defense thereof other than reasonable costs of investigation, provided
nothing contained herein shall permit the Company or Seller to control or
participate in any tax contest or dispute involving any Affiliate of Buyer, or
permit Buyer to control or participate in any tax contest or dispute involving
any Affiliate of Seller; further provided, however, that each Party agrees to
keep the other Party and the Company reasonably apprised of the status of such
tax contest and any settlement negotiations related solely to tax items that are
Company items at issue in such tax contest. In the event that (i) the
Indemnifying Party advises an Indemnified Party that it will not contest a claim
for indemnification hereunder, (ii) the Indemnifying Party fails, within 30 days
of receipt of any

                                       28

<PAGE>

indemnification notice to notify, in writing, such Indemnified Party of its
election, to defend, settle or compromise, at is sole cost and expense, any
action, proceeding or claim (or discontinues its defense at any time after it
commences such defense) or (iii) in the reasonable judgment of the Indemnified
Party, a conflict of interest between it and the Indemnifying Party exists in
respect of such action, proceeding or claim, then the Indemnified Party may, at
its option, defend, settle or otherwise compromise or pay such action or claim.
In any event, unless and until the Indemnifying Party elects in writing to
assume and does so assume the defense of any such claim, proceeding or action,
the Indemnifying Party shall be liable for the Indemnified Party's reasonable
costs and expenses arising out of the defense, settlement or compromise of any
such action, claim or proceeding. The Indemnified Party shall cooperate fully
with the Indemnifying Party in connection with any negotiation or defense of any
such action or claim by the Indemnifying Party. The Indemnifying Party shall
keep the Indemnified Party fully apprised at all times as to the status of the
defense or any settlement negotiations with respect thereto. If the Indemnifying
Party elects to defend any such action or claim, then the Indemnifed Party shall
be entitled to participate in such defense with counsel of its choice at its
sole cost and expense. If the Indemnifying Party does not assume such defense,
the Indemnified Party shall keep the Indemnifying Party apprised at all times as
to the status of the defense; provided, however, that the failure to keep the
Indemnifying Party so informed shall not affect the obligations of the
Indemnifying Party hereunder. The Indemnifying Party shall not be liable for any
settlement of any action, claim or proceeding effected without its written
consent; provided, however, that the Indemnifying Party shall not unreasonably
withhold, delay or condition its consent. Notwithstanding anything in this
Section 7.3 to the contrary, the Indemnifying Party shall not, without the
Indemnified Party's prior written consent, settle or compromise any claim or
consent to entry of judgment in respect thereof which imposes any future
obligation on the Indemnified Party or which does not include, as an
unconditional term thereof, the giving by the claimant or the plaintiff to the
Indemnified Party, a release from all liability in respect of such claim.

                (b)     If the amount of any Buyer Indemnified Costs, at any
time after the making of an indemnity payment in respect thereof, is reduced by
recovery, settlement or otherwise under any insurance coverage (excluding any
proceeds from self-insurance or flow-through insurance policies) or under any
claim, recovery, settlement or payment by or against any other entity, the
amount of such reduction, less any costs, expenses or premiums incurred in
connection therewith (together with interest thereon from the date of payment
thereof by such insurer or other entity to the Indemnified Party at the
Commercial Paper Rate), must promptly be repaid by the Indemnified Party to the
Indemnifying Party. Upon making any indemnity payment, the Indemnifying Party
will, to the extent of such indemnity payment, be subrogated to all rights of
the Indemnified Party against any third party, except third parties that provide
insurance coverage to the Indemnified Party or its Affiliates, in respect of the
Buyer Indemnified Costs to which the indemnity payment relates; provided,
however, that (i) the Indemnifying Party must then be in compliance with its
obligations under this Agreement in respect of such Buyer Indemnified Costs and
(ii) until the Indemnified Party recovers full payment of its Buyer Indemnified
Costs, any and all claims of the Indemnifying Party against any such third party
on account of said indemnity payment are hereby made expressly subordinate and
subject in right of payment to the Indemnified Party's rights against such third
party. Without limiting the generality or effect of any other provision hereof,
each such Indemnified Party and Indemnifying Party shall duly execute upon
request all instruments reasonably necessary to evidence and perfect the
above-described subrogation and subordination rights, and otherwise cooperate in
the

                                       29

<PAGE>

prosecution of such claims at the direction of the Indemnifying Party. Nothing
in this Section 7.3(b) will be construed to require any Party to obtain or
maintain any insurance coverage.

                (c)     The Parties hereby agree that, in the event of any
conflict between the rights and obligations of the Parties set forth in this
Section 7.3 with respect to defense of claims relating to any loss of Tax
Credits and the rights and obligations of the Members set forth in Section 7.7
of the Amended LLC Agreement, the provisions of the latter shall control.

        7.4     Direct Claims. In any case in which an Indemnified Party seeks
indemnification under this Article 7 which is not subject to Section 7.3 because
no Third Party Claim is involved, the Indemnified Party shall notify the
Indemnifying Party in writing of any costs which such Indemnified Party claims
are subject to indemnification under the terms of this Article 7. The failure of
the Indemnified Party to exercise promptness in such notification shall not
amount to a waiver of such claim, except to the extent the resulting delay
materially prejudices the position of the Indemnifying Party with respect to
such claim.

        7.5     After-Tax Basis. For tax reporting purposes, to the maximum
extent permitted by the Code, each Party will agree to treat all amounts paid
under any of the provisions of this Article 7 as an adjustment to the purchase
price for the Membership Interest (or otherwise as a non-taxable reimbursement,
contribution or return of capital, as the case may be). To the extent that any
indemnification payment treated as a purchase price adjustment arises from a
loss that does not give rise to a deduction for the Indemnified Party for income
tax purposes, such indemnification payment shall be increased in an amount
equal, on an after-tax basis, to the lost tax benefits (calculated using a
discount rate of ten percent per annum and assuming that depreciation or
amortization deductions would be fully utilized when available) or additional
tax due as a result of the purchase price adjustment. To the extent any such
indemnification payment is includable as income of the Indemnified Party as
determined by agreement of the Parties, or if there is no agreement, by an
opinion of Chadbourne & Parke LLP or other nationally recognized tax counsel of
the Indemnified Party (after consultation in good faith with the Indemnifying
Party and its tax counsel) that such amount is "more likely than not" includable
as income of the recipient (accompanied by certification by the Indemnified
Party's tax director or a managing director of its tax department that such
amount will be included as income in the consolidated federal income tax return
in which such amount would be includable), the amount of the payment shall be
increased by the amount of any federal or state income tax required to be paid
by the Indemnified Party or its Affiliates on the receipt or accrual of the
indemnification payment, including, for this purpose, the amount of any such Tax
required to be paid by the Indemnified Party on the receipt or accrual of the
additional amount required to be added to such payment pursuant to this Section
7.5, using an assumed rate equal to the highest marginal federal income tax rate
applicable to corporations generally (currently 35 percent) and an assumed
blended state and local tax rate of 5.25 percent (taking into account the
deductibility of state income tax for federal income tax purposes) applicable to
corporations from time to time and assuming that the Indemnified Party and its
Affiliates recognize the same amount of taxable income for state and local
income tax purposes as they recognize for federal income tax purposes in respect
of such indemnification payment. Any payment made under this Article 7 shall be
reduced by the present value (as determined on the basis of a discount rate
equal to ten percent per annum) of any federal or state income tax benefit to be
realized by the Indemnified Party or its Affiliates by reason of the facts and
circumstances giving rise to such indemnification. For

                                       30

<PAGE>

purposes of this Section 7.5, the amount of any state income tax benefit or cost
shall take into account the federal income tax effect of such benefit or cost.

        7.6     Express Negligence Rule. WITHOUT LIMITING OR ENLARGING THE SCOPE
OF THE INDEMNIFICATION OBLIGATIONS SET FORTH IN THIS ARTICLE 7, AN INDEMNIFIED
PARTY SHALL BE ENTITLED TO INDEMNIFICATION UNDER THIS ARTICLE 7 IN ACCORDANCE
WITH THE TERMS HEREOF, REGARDLESS OF WHETHER THE LOSS OR CLAIM GIVING RISE TO
SUCH INDEMNIFICATION OBLIGATION IS THE RESULT OF THE SOLE, CONCURRENT OR
COMPARATIVE NEGLIGENCE, GROSS NEGLIGENCE, STRICT LIABILITY OR VIOLATION OF ANY
LAW OF OR BY SUCH INDEMNIFIED PARTY. THE PARTIES AGREE THAT THIS PARAGRAPH
CONSTITUTES A CONSPICUOUS LEGEND.

        7.7     No Duplication. Any liability for indemnification under this
Article 7 shall be determined without duplication of recovery by reason of the
state of facts giving rise to such liability constituting a breach of more than
one representation, warranty, covenant or agreement. The liability of any Party
hereunder with respect to the representations and warranties of such Party will
not be reduced by any investigation made at any time by or on behalf of any
other Party.

        7.8     Sole Remedy. The remedies of the Parties under this Article VII
are the sole and exclusive remedies that a Party may have under this Agreement
for the recovery of monetary damages with respect to any breach or failure to
perform any covenant or agreement set forth in Article IV of this Agreement or
any breach of any representation or warranty set forth in this Agreement.

        7.9     Survival.

                (a)     All representations, warranties, covenants and
obligations made or undertaken by a Party in this Agreement or in any
Transaction Document are material, have been relied upon by the other Parties
and shall survive the Closing hereunder as set forth in this Section 7.9, and
shall not merge in the performance of any obligation by any Party hereto.

                (b)     Subject to Section 7.10, all claims by a Buyer
Indemnified Party for indemnification pursuant to this Article 7 resulting from
breaches of representations or warranties shall be forever barred unless MHSI is
notified within 18 months after the Closing Date, except that the
representations and warranties set forth in Sections 3.3(i) and 3.3(p) with
respect to the period after October 15, 2001 shall survive until six months
after the expiration of the applicable statute of limitations (giving effect to
any waiver, mitigation or extensions thereof); provided, that, if written notice
of a claim for indemnification has been given by such Buyer Indemnified Party on
or prior to the last day of the respective foregoing period, as applicable, then
the obligation of MHSI to indemnify such Buyer Indemnified Party pursuant to
this Article 7 shall survive with respect to such claim until such claim is
finally resolved.

                (c)     All claims by a Seller Indemnified Party for
indemnification pursuant to this Article 7 resulting from breaches of
representations or warranties shall be forever barred

                                       31

<PAGE>

unless Buyer is notified within 18 months after the Closing Date; provided,
that, if written notice for a claim of indemnification has been given by such
Seller Indemnified Party on or prior to the last day of the foregoing period,
then the obligation of Buyer to indemnify such Seller Indemnified Party pursuant
to this Article 7 shall survive with respect to such claim until such claim is
finally resolved.

        7.10    Indemnification as to Historical Representations and Warranties;
Other Indemnification.

                (a)     For the period up to and including October 15, 2001,
Seller and MHSI have, in Section 3.2 hereof, repeated the Historical
Representations and Warranties under the PacifiCorp/Marriott Agreement. With
respect to any claim for breach of representations or warranties contained in
Section 3.2 hereof, the sole remedy of Buyer is the following. Buyer shall
notify MHSI of Buyer's claim and MHSI shall cause Marriott to seek from
PacifiCorp any indemnification or pursue any other claim in contract, tort or
equity available to Marriott (considering any survival periods in the
PacifiCorp/Marriott Agreement) from PacifiCorp for breach of the counterpart
Historical Representation and Warranty or for other breach of the
PacifiCorp/Marriott Agreement. Any indemnification amounts resulting therefrom
which are paid to Marriott shall be caused by MHSI to be divided by Marriott
between Buyer and Marriott on a pro rata basis reflecting the relative damages
suffered by Buyer from the Closing Date to the date the claim giving rise to
such indemnification is made and by Marriott and/or MHSI from October 15, 2001
to the date the claim giving rise to such indemnification is made. To the extent
that aggregate indemnification payments made by PacifiCorp to Marriott with
respect to a breach or breaches by PacifiCorp of representations and warranties
contained in Section 3.2 of the PacifiCorp/Marriott Agreement are less than the
indemnification payments required to be made therefor by PacifiCorp under such
Agreement, MHSI agrees to indemnify Buyer for the amount of such deficiency;
provided, however, that, except as otherwise provided in Section 7.1, in no
event shall MHSI's aggregate obligations under this Section 7.10 and Section 7.1
(in each case excluding indemnification payments made directly by PacifiCorp in
respect of breach of Historical Representations and Warranties) exceed in the
aggregate the MHSI Cap.

                (b)     As provided in Section 3.3 hereof, the representations
and warranties set forth therein (except for those which expressly relate to the
period before October 15, 2001) have effect from, and relate only to, the period
commencing October 15, 2001, and the indemnification obligations of MHSI under
this Article 7 in respect of such Section 3.3 relate only to that period.

                                    ARTICLE 8
                               GENERAL PROVISIONS

        8.1     Exhibits and Schedules. All Exhibits and Schedules attached
hereto are incorporated herein by reference.

        8.2     Further Actions. After the Execution Date, each of Seller, MHSI
and Buyer shall, without further consideration, at its own expense, execute and
deliver such other certificates, agreements, conveyances, and other documents,
and take such other action, as may be reasonably requested by the other Party in
order to transfer and assign to, and vest in, Buyer

                                       32

<PAGE>

all right, title and interest in the Membership Interest and more effectively to
consummate the sale of the Membership Interest pursuant to the terms of this
Agreement.

        8.3     Amendment, Modification and Waiver. This Agreement may not be
amended or modified except by an instrument in writing signed by the Party
against which enforcement of such amendment or modification is sought. Any
failure of Buyer on the one hand, or Seller or MHSI, on the other hand, to
comply with any obligation, covenant, agreement, or condition contained herein
may be waived only if set forth in an instrument in writing signed by the Party
or Parties to be bound thereby, but such waiver or failure to insist upon strict
compliance with such obligation, covenant, agreement or condition shall not
operate as a waiver of, or estoppel with respect to, any other failure.

        8.4     Severability. If any term or other provision of this Agreement
is invalid, illegal, or incapable of being enforced by any rule of Applicable
Law, or public policy, all other conditions and provisions of this Agreement
shall nevertheless remain in full force and effect so long as the economic or
legal substance of the transactions contemplated herein are not affected in any
manner materially adverse to any Party.

        8.5     Expenses and Obligations. Except as otherwise expressly provided
in this Agreement, all costs and expenses incurred by the Parties in connection
with this Agreement and the consummation of the transactions contemplated hereby
shall be borne solely and entirely by the Party which has incurred such
expenses. Seller and MHSI acknowledge and agree that the Operating Company has
not borne and will not bear, any of Seller's or MHSI's costs and expenses
(including legal fees and expenses) in connection with this Agreement or the
transactions contemplated hereby.

        8.6     Parties in Interest. This Agreement shall be binding upon and,
except as provided below, inure solely to the benefit of each Party and their
successors and assigns, and nothing in this Agreement, express or implied, is
intended to confer upon any other Person (other than the Buyer Indemnified
Parties and Seller Indemnified Parties as provided in Article 7) any rights or
remedies of any nature whatsoever under or by reason of this Agreement.

        8.7     Notices. All notices and other communications hereunder shall be
in writing and shall be deemed given if delivered personally, by a nationally
recognized overnight courier, by facsimile, or mailed by registered or certified
mail (return receipt requested) to the Parties at the following addresses (or at
such other address for a Party as shall be specified by like notice):

                (a)     If to Seller, to:

                        Synthetic American Fuel
                        Enterprises Holdings, Inc.
                        10400 Fernwood Road
                        Bethesda, MD 20817
                        Attention: Senior Vice President, Tax
                        Fax: 301-380-8299

                                       33

<PAGE>

                        With a copy to:

                        Marriott International, Inc.
                        10400 Fernwood Road
                        Bethesda, MD 20817
                        Attention: General Counsel
                        Fax: (301) 380-6727

                (b)     If to MHSI, to:

                        Marriott Hotel Services, Inc.
                        10400 Fernwood Road
                        Bethesda, MD 20817
                        Attention: Senior Vice President, Tax
                        Fax: 301-380-8299

                        With a copy to:

                        Marriott International, Inc.
                        10400 Fernwood Road
                        Bethesda, MD 20817
                        Attention: General Counsel
                        Fax: (301) 380-6727

                (c)     If to Buyer, to:


                        Serratus LLC
                        c/o Morgan Stanley
                        c/o _______________
                        ___________________
                        New York, NY ______
                        Attention: __________________________
                        Fax: _________________________
                        With a copy to:


                        ___________________
                        ___________________
                        New York, NY _____
                        Attention: __________________________
                        Fax: _______________

All notices and other communications given in accordance herewith shall be
deemed given (i) on the date of delivery, if hand delivered, (ii) on the date of
receipt, if faxed (provided a hard copy of such transmission is dispatched by
first class mail within 48 hours), (iii) three Business Days

                                       34

<PAGE>

after the date of mailing, if mailed by registered or certified mail, return
receipt requested, and (iv) one Business Day after the date of sending, if sent
by a nationally recognized overnight courier; provided, that a notice given in
accordance with this Section 8.7 but received on any day other than a Business
Day or after business hours in the place of receipt, will be deemed given on the
next Business Day in that place.

        8.8     Counterparts. This Agreement may be executed and delivered
(including by facsimile transmission) in one or more counterparts, all of which
shall be considered one and the same agreement and shall become effective when
one or more counterparts have been signed by each of the Parties and delivered
to the other Parties, it being understood that all Parties need not sign the
same counterpart.

        8.9     Entire Agreement. This Agreement (which term shall be deemed to
include the Exhibits and Schedules hereto and the other certificates, documents
and instruments delivered hereunder) constitutes the entire agreement of the
Parties and supersedes all prior agreements, letters of intent and
understandings, both written and oral, among the Parties with respect to the
subject matter hereof. There are no representations or warranties, agreements,
or covenants other than those expressly set forth in this Agreement.

        8.10    Governing Law; Choice of Forum; Waiver of Jury Trial. THIS
AGREEMENT SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE
STATE OF NEW YORK APPLICABLE TO CONTRACTS EXECUTED AND PERFORMED THEREIN. THE
PARTIES HEREBY IRREVOCABLY SUBMIT TO THE NON-EXCLUSIVE JURISDICTION OF ANY STATE
OR FEDERAL COURT IN NEW YORK WITH RESPECT TO ANY ACTION OR PROCEEDING ARISING
OUT OF OR RELATING TO THIS AGREEMENT. EACH PARTY HERETO IRREVOCABLY AND
UNCONDITIONALLY WAIVES TRIAL BY JURY IN ANY ACTION, SUIT OR PROCEEDING RELATING
TO A DISPUTE AND FOR ANY COUNTERCLAIM WITH RESPECT THERETO.

        8.11    Public Announcements. Except for statements made or press
releases issued (i) pursuant to the Securities Act of 1933 or the Securities
Exchange Act of 1934, (ii) pursuant to any listing agreement with any national
securities exchange or the National Association of Securities Dealers, Inc., or
(iii) as otherwise required by law, neither MHSI, the Seller, the Buyer or any
of its Affiliates shall issue any press release or otherwise make any public
statements with respect to this Agreement or the transactions contemplated
hereby without the prior written consent of the other Parties. MHSI, on the one
hand, and Buyer, on the other hand, will have the right to review in advance all
information relating to the transactions contemplated by the Transaction
Documents that appear in any filing made in connection with the transactions
contemplated hereby or thereby.

        8.12    Assignment. This Agreement and all of the provisions hereof will
be binding upon and inure to the benefit of the Parties and their respective
successors and permitted assigns. This Agreement may only be assigned to the
same extent (and only by and to the same Persons) that membership interests in
the Operating Company are assignable pursuant to the terms of Article X of the
Amended LLC Agreement. Any attempted assignment of this Agreement other than in
strict accordance with this Section 8.12 and the terms of Article X of the
Amended LLC

                                       35

<PAGE>

Agreement shall be null and void and of no force or effect.

        8.13    Relationship of Parties. This Agreement does not constitute a
joint venture, association or partnership between the Parties. No express or
implied term, provision or condition of this Agreement shall create, or shall be
deemed to create, an agency, joint venture, partnership or any fiduciary
relationship between the Parties.

                       [Signatures on the Following Page]

                                       36

<PAGE>

                IN WITNESS WHEREOF, each party hereto has caused this Agreement
for Purchase of Membership Interest to be signed on its behalf as of the date
first written above.

                                         SYNTHETIC AMERICAN FUEL
                                         ENTERPRISES HOLDINGS, INC.

                                         By:   /s/  Mark W. Brugger
                                             -----------------------------------
                                         Name:      Mark W. Brugger
                                               ---------------------------------
                                         Title:     President
                                                --------------------------------


                                         MARRIOTT HOTEL SERVICES, INC.

                                         By:   /s/  Mark W. Brugger
                                             -----------------------------------
                                         Name:      Mark W. Brugger
                                               ---------------------------------
                                         Title:     Vice President
                                                --------------------------------


                                         SERRATUS LLC

                                         By:   /s/
                                              ----------------------------------
                                         Name:      John
                                               ---------------------------------
                                         Title:
                                                --------------------------------

<PAGE>

                                     ANNEX I

                                   DEFINITIONS

                "Actual Credit Amount" has the meaning set forth in Section
2.5(d).

                "Adjustment Date" means the first Quarterly Payment Date after
May 31 of each calendar year.

                "Account" shall mean an account of Seller, as designated in
writing by Seller no later than five Business Days prior to the first applicable
Quarterly Payment Date after the Closing Date for which a Fixed Deferred
Payment, Variable Deferred Payment or payment under the Base Note is due
hereunder, or such other account as Seller shall designate in writing no later
than ten Business Days prior to the next applicable Quarterly Payment Date at
any time following the Closing Date.

                "Accounting Firm" means the Operating Company's primary
independent accounting firm, which shall be Deloitte & Touche or such other
"Final 4" firm of certified public accountants (i.e., Ernst & Young, KPMG Peat
Marwick or PricewaterhouseCoopers) selected by the Administrative Member and
approved by the Buyer.

                "Administrative Member" means MHSI in its capacity as
administrative member of the Operating Company under the Amended LLC Agreement
or such Person that is appointed pursuant to and in accordance with the terms of
the Amended LLC Agreement as the administrative member.

                "Affiliate" means, with respect to any Person, any other Person
controlling, controlled by or under common control with such first Person. For
purposes of this definition and the Agreement, (a) the term "control" (and
correlative terms) means (1) the ownership of 50% or more of the equity interest
in a Person, or (2) the power, whether by contract, equity ownership or
otherwise, to direct or cause the direction of the policies or management of a
Person, and (b) the Operating Company shall be deemed to be an Affiliate of
Seller prior to the Closing (for purposes of representations and warranties),
but shall not be deemed to be an Affiliate of Seller or Buyer from and after the
Closing.

                "Agreement" means this Agreement for Purchase of Membership
Interest.

                "Amended LLC Agreement" means the Amended and Restated Limited
Liability Company Agreement of the Operating Company, of even date herewith, by
and among Seller, Holdings and Buyer in the form attached hereto as Exhibit I.

                "Annual Adjustment Amount" has the meaning set forth in Section
2.5(d).

                "Applicable Laws" means all laws (including common law),
statutes, rules, regulations, ordinances, judgments, settlements, orders,
decrees, injunctions, and writs of any Governmental Authority having
jurisdiction over the Facilities, the Subject Assets, or the operations of the
Operating Company, including any applicable zoning laws and building codes.

<PAGE>

                "Applicable Percentage" means 119 percent.

                "Assignment Agreement" means the Assignment of Membership
Interest, of even date herewith, by and between Buyer and Seller.

                "Balance Sheets" has the meaning set forth in Section 3.3(a)(i).

                "Balance Sheet Date" has the meaning set forth in Section
3.3(a)(ii).

                "Base Note" means the promissory note attached hereto as Exhibit
A.

                "Business Day" means any day other than (i) a Saturday or Sunday
or (ii) a day on which commercial banks in New York, New York are authorized or
required to be closed.

                "Buyer" has the meaning set forth in the first paragraph of the
Agreement and includes its permitted successors and assigns.

                "Buyer Indemnified Costs" means any and all damages, losses,
claims, liabilities, demands, charges, suits, penalties, costs, and expenses
(including disallowance of Tax Credits or other tax deductions, together with
IRS interest and penalties thereon and reasonable costs and expenses of any and
all actions, suits, proceedings, investigations, assessments, judgments,
settlements and compromises relating thereto and reasonable attorneys' fees and
reasonable disbursements in connection therewith, whether such costs, expenses,
fees and disbursements relate to a third party claim or to a claim by Buyer
directly against Seller or MHSI) incurred by any of the Buyer Indemnified
Parties resulting from or relating to any breach or default by Seller or MHSI of
any representation, warranty, covenant, indemnity or agreement under this
Agreement or any other Transaction Document or a claim for fraud.

                "Buyer Indemnified Parties" means Buyer and each of its
Affiliates and each of their respective shareholders, members, officers,
directors, employees, agents, and other representatives, and their respective
successors and assigns.

                "Buyer Parent" has the meaning set forth in the recitals to the
Agreement.

                "Buyer Parent Guaranty" means the Guarantee, of even date
herewith, made by Buyer Parent in favor of Seller, MHSI and the Operating
Company substantially in the form attached hereto as Exhibit E.

                "Buyer Security Agreement" means the Pledge and Security
Agreement, of even date herewith, by Buyer in favor of Seller and the Operating
Company in the form attached hereto as Exhibit G.

                "CERCLA" has the meaning set forth in the definition of
Environmental Laws contained in this Annex I.

                "CERCLIS" has the meaning set forth in Section 3.2(i).

<PAGE>

                "Cleared Person" means the Tennessee Valley Authority, Tampa
Electric Company, Alabama Power Company and any Person as to which Buyer
notifies Seller (or is deemed to have notified Seller) is a Cleared Person in
the Customer Certificate pursuant to Section 2.5(g) hereof, such Person to
constitute a Cleared Person for purposes hereof as of the date of such Customer
Certificate and at all times prior thereto.

                "Closing" means, subject to Section 2.9(c), the satisfaction of
the requirements set forth in Section 2.9(b).

                "Closing Date" means the date of the Closing specified in
Section 2.9(b).

                "Code" means the United States Internal Revenue Code of 1986, as
amended.

                "Commercial Paper Rate" means, for each day that any payment
obligation hereunder is outstanding, the most recent published yield on
commercial paper with the shortest quoted period of not fewer than 30 days
placed by dealers, as reported for each such day either in the Federal Reserve
Rate Report that customarily appears in the Friday issue of The Wall Street
Journal (Eastern Edition) under "Money Rates" or, if such report does not so
appear, in such other nationally-recognized publication or electronic data
service as Seller and Buyer may, from time to time, agree on. On days when such
a rate is not reported, the most recently reported rate on a preceding day will
be deemed to be the applicable rate.

                "Consent" means any consents or approval of any Governmental
Authority or any other Person.

                "Consultation" or "Consult" means to confer with, and reasonably
consider and take into account the reasonable suggestions, comments or opinions
of another Person.

                "Contracts" means all written agreements, contracts, or other
binding commitments or arrangements (including any amendments and other
modifications thereto), to which the Operating Company is a party or is
otherwise bound and which affect, relate to, or are included in, the Subject
Assets.

                "Customer Certificate" has the meaning given to such term in
Section 2.5(g) hereof.

                "Environmental Costs or Liabilities" means any losses,
liabilities, obligations, damages, fines, penalties, judgments, settlements,
actions, claims, demands, costs and expenses (including costs relating to
personal injury, death or property damage, reasonable fees, disbursements and
expenses of legal counsel, experts, engineers and consultants, and the costs of
investigation or feasibility studies and performance of remedial or removal
actions and cleanup and monitoring activities) arising from, under or in
connection with (a) any violation of, or alleged violation of, any Environmental
Laws, (b) any remedial obligation under any Environmental Laws, or (c) any other
liability imposed under any Environmental Laws.

                "Environmental Laws" means all Applicable Laws and rules of
common law pertaining to the environment, human health, safety and natural
resources, including, but not limited to, the Comprehensive Environmental
Response, Compensation and Liability Act of

<PAGE>

1980 (42 U.S.C. Section 9601 et seq.) ("CERCLA"), the Emergency Planning and
Community Right to Know Act and the Superfund Amendments and Reauthorization Act
of 1986, the Resource Conservation and Recovery Act of 1976, the Hazardous and
Solid Waste Amendments Act of 1984, the Clean Air Act, the Clean Water Act, the
Federal Water Pollution Control Act, the Toxic Substances Control Act, the Safe
Drinking Water Act, the Occupational Safety and Health Act of 1970, the Federal
Mine Safety and Health Act, the Surface Mining Control and Reclamation Act, the
Oil Pollution Act of 1990, the Hazardous Materials Transportation Act, and any
similar or analogous statutes, regulations promulgated thereunder and decisional
law of any Governmental Authority, as each of the foregoing may have been or are
in the future amended or supplemented, in each case to the extent applicable
with respect to the property or operation to which application of the term
"Environmental Laws" relates.

                "ERISA" means the United States Employee Retirement Income
Security Act of 1974, as amended.

                "Escrow Account" means the account maintained by the Escrow
Agent pursuant to the Escrow Agreement.

                "Escrow Agent" means the escrow agent under the Escrow
Agreement.

                "Escrow Agreement" means the Escrow Agreement to be entered into
among MHSI, Holdings, Buyer and the Escrow Agent as soon as practicable after
the date hereof in substantially the form attached hereto as Exhibit L.

                "Estimated Tax Credits" has the meaning set forth in Section
2.5(b).

                "Excluded Boxes" means the items described in Schedule
3.3(p)(iv)A.

                "Excluded Sales" means (a) sales of Pre-Sale Inventory and (b)
sales to any MS Related Person that is not a Cleared Person.

                "Execution Date" has the meaning set forth in Section 2.9(a).

                "Exhibits" means the Exhibits attached to the Agreement.

                "Facilities" has the meaning set forth in the recitals to the
Agreement.

                "Final Adjustment Amount" has the meaning set forth in Section
2.5(e).

                "Final Adjustment Date" means June 20 of the year following the
year that the last Variable Deferred Payment is due under Section 2.5.

                "Financial Statements" has the meaning set forth in Section
3.2(a)(i).

                "Fiscal Year" means the fiscal year of the Operating Company,
which shall be the same as the taxable year of the Operating Company. The
taxable year of the Operating Company will be a year that ends on November 30,
or such other year as may be required by applicable federal income tax law.

<PAGE>

                "Fixed Deferred Payment" has the meaning set forth in Section
2.4.

                "Fixed Payment Term" has the meaning set forth in Section 2.4.

                "GAAP" means generally accepted accounting principles as
recognized by the American Institute of Certified Public Accountants, as in
effect from time to time, consistently applied and maintained on a consistent
basis for a Person throughout the period indicated and consistent with such
Person's prior financial practice.

                "Governmental Authority" means any governmental department,
commission, board, bureau, agency, court or other instrumentality of any
country, state, province, county, parish or municipality, jurisdiction, or other
political subdivision thereof.

                "Hazardous Substances" means (A) any hazardous materials,
hazardous wastes, hazardous substances, toxic wastes, solid wastes, and toxic
substances as those or similar terms are defined under any Environmental Laws;
(B) any asbestos or any material which contains any hydrated mineral silicate,
including chrysolite, amosite, crocidolite, tremolite, anthophylite and/or
actinolite, whether friable or non-friable; (C) polychlorinated biphenyls
("PCBs"), or PCB-containing materials, or fluids; (D) radon; (E) any other
hazardous, radioactive, toxic or noxious substance, material, pollutant,
contaminant, constituent, or solid, liquid or gaseous waste; (F) any petroleum,
petroleum hydrocarbons, petroleum products, crude oil and any fractions or
derivatives thereof, and any natural gas, synthetic gas and any mixtures
thereof; and (G) any substance that, whether by its nature or its use, is
subject to regulation under any Environmental Laws or with respect to which any
Environmental Laws or Governmental Authority requires environmental
investigation, monitoring or remediation.

                "Historical Representations and Warranties" has the meaning set
forth in Section 3.2.

                "Indemnified Party" means any Person seeking indemnification
from another Person pursuant to Article 7.

                "Indemnifying Party" means any Person against whom a claim for
indemnification is asserted by another Person pursuant to Article 7.

                "Independent Chemist" means Paspek Consulting LLC, or such other
chemist as may be chosen by the Members of the Company from time to time.

                "Independent Engineer" means John T. Boyd Company, or such other
engineer as selected by the Buyer from time to time.

                "Intellectual Property" means all trademarks, know-how,
copyrights, copyright registrations and applications for registration, patents
and all other intellectual property rights including Internet domain names,
whether registered or not, and the goodwill related to all of the foregoing.

                "IRS" means the Internal Revenue Service of the United States of
America.

<PAGE>

                "Knowledge" means the actual knowledge of, or knowledge that
would have been obtained after reasonable investigation by, with respect to a
Party and its Affiliates, any of its respective officers, directors or
management personnel. References to Marriott's Knowledge shall mean the
Knowledge of Marriott, MHSI or Seller.

                "Liabilities" has the meaning set forth in Section 3.3(a)(iii).

                "Liens" has the meaning set forth in Section 3.3(h).

                "Manager" has the meaning set forth in the Amended LLC
Agreement.

                "Marriott" has the meaning set forth in the recitals to the
Agreement.

                "Marston Report" means a report entitled "Verification of
Synfuel Project Asset Relocation" prepared by Marston & Marston, Inc. for
Synthetic American Fuel Enterprises I, LLC and Synthetic American Fuel
Enterprises II, LLC and dated June 2002.

                "Material Adverse Effect" means a material adverse effect on the
ability of the Companies to validly claim Tax Credits (under the Tax laws as
they exist as of the date of this Agreement) from the sale of Synfuel or on the
business, operations, properties, condition, results of operations, assets,
liabilities, or prospects (financial or otherwise) of the Company taken as a
whole or the transactions contemplated hereby.

                "Membership Interest" means a 48.9% membership interest in the
Operating Company, including an 0.1% membership interest previously acquired by
Buyer (it being understood that Seller is not required to convey such 0.1%
interest a second time).

                "MHSI Cap" means 53% of the aggregate Tax Credits, plus
Estimated Tax Credits for any period as to which a Tax Return has not yet been
filed, to the time or times that an indemnification claim is made, less the
aggregate of all indemnification payments based on the MHSI Cap theretofore made
pursuant to Sections 7.1 and 7.10 hereof.

                "MSHA" means the Mine Safety and Health Act of 1977, as amended
(29 U.S.C. Section 801 et seq.).

                "MS Related Person" means any Person which, as to the Operating
Company, at a given point in time, is a "related person" within the meaning of
Section 29(d)(7) of the Code by reason of a direct or indirect relationship or
affiliation with Buyer or any of Buyer's Affiliates.

                "NPL" has the meaning set forth in Section 3.3(i)(v).

                "Operating Company" or "Company" has the meaning set forth in
the recitals to the Agreement.

                "Operations Report" has the meaning set forth in Section 2.5(b).

                "Ordinary Course of Business" means the ordinary course of
business consistent with past custom and practice (including with respect to
quantity and frequency) of the Operating

<PAGE>

Company and consistent with usual and customary practices of the coal-based
synthetic fuel industry.

                "PacifiCorp" has the meaning set forth in the recitals to the
Agreement.

                "PacifiCorp/Marriott Agreement" has the meaning set forth in the
recitals to the Agreement.

                "Party" means a party to the Agreement.

                "Permits" has the meaning set forth in Section 3.3(b).

                "Permitted Liens" means (a) liens for Taxes not yet due; (b)
carrier's, warehousemen's, mechanics', materialmen's, repairmen's, employees',
contractors', operators' or other similar liens or charges securing the payment
of expenses not yet due and payable that were incurred in the Ordinary Course of
Business, but not exceeding $250,000; (c) any obligations or duties to any
Governmental Authority arising in the Ordinary Course of Business with respect
to any Permit held by the Operating Company, and all Applicable Laws, rules,
regulations and orders of any Governmental Authority; (d) required third party
Consents listed in Schedule 3.1(e); and (e) minor imperfections of title that
would not materially affect the value, use, operation or ownership of any asset.

                "Person" means an individual, corporation, partnership, limited
liability company, association, trust, unincorporated organization, or other
entity.

                "Personal Property" means machinery, equipment, computer
programs, computer software, tools, motor vehicles, furniture, furnishings,
leasehold improvements, fixtures, office equipment, inventories, supplies, spare
parts, and other tangible or intangible personal property.

                "Plan" means each defined benefit pension plan subject to Title
IV of ERISA that is or was maintained, sponsored or established for employees
for any ERISA Affiliate or to which any ERISA Affiliate has or has had any
liability or any obligation to contribute, including any "multiemployer plan"
within the meaning of Section 4001(a)(3) of ERISA.

                "Pre-Sale Inventory" means the Company's inventory of synthetic
fuel held for sale as of the Closing Date.

                "Private Letter Ruling" has the meaning set forth in Section
2.9(b).

                "Prudent Operating Standards" means those standards, methods and
acts that (a) when engaged in are commonly used in prudent engineering
maintenance and operations of synthetic fuel production facilities and
associated mechanical and handling facilities and equipment lawfully and with
safety, reliability, efficiency and expedition or (b) in the exercise of
reasonable judgment considering the facts known when engaged in, could have been
expected to achieve the desired result consistent with applicable law, safety,
reliability, efficiency and expedition. Prudent Operating Standards are not
limited to the optimum practice, method or act, but rather are a spectrum of
possible practices, methods of acts.

<PAGE>

                "Purchase Price" has the meaning set forth in Section 2.2.

                "Quarter" means the periods corresponding to one fourth of a
full Fiscal Year of the Operating Company (which shall be three month periods if
such Fiscal Year is based on a 365 day year, and periods of thirteen or fourteen
weeks if such Fiscal Year is a 52-53 week year), or the applicable portion of
such periods in the case of any short Fiscal Year.

                "Quarterly Maximum Production" means not more than 1,920,000
tons of synthetic fuel in any Quarter.

                "Quarterly Payment Date" has the meaning set forth in Section
2.5(b).

                "Request" has the meaning set forth in Section 5.3(a).

                "Schedules" means the Schedules attached to the Agreement.

                "Seller" has the meaning set forth in the first paragraph of the
Agreement.

                "Seller Parent" has the meaning set forth in the recitals to the
Agreement.

                "Seller Parent Guaranty" means the Guarantee, of even date
herewith, made by Seller Parent in favor of Buyer substantially in the form
attached hereto as Exhibit F.

                "Seller Indemnified Costs" means any and all damages, losses,
claims, liabilities, demands, charges, suits, penalties, costs, and expenses
(including court costs and reasonable attorneys' fees and expenses) incurred by
any of the Seller Indemnified Parties resulting from or relating to any breach
or default by Buyer of any representation, warranty, covenant, indemnity or
agreement under this Agreement or any Transaction Document.

                "Seller Indemnified Parties" means Seller, MHSI and each of
their respective Affiliates, including the Operating Company prior to the
Closing, and each of their respective officers, directors, employees, agents and
other representatives, and their respective successors and assigns.

                "Seller Parties" means Seller Parent, Seller, MHSI, the
Operating Company, and each of their Affiliates.

                "Seller Security Agreement" means the Pledge and Security
Agreement, of even date herewith, by MHSI in favor of Buyer and the Operating
Company in the form attached hereto as Exhibit H.

                "Subject Assets" means all of the assets of the Operating
Company, both tangible and intangible, including the Facilities.

                "SynAmerica I" has the meaning set forth in the recitals to the
Agreement.

<PAGE>

                "SynAmerica I Purchase Agreement" means the Agreement for
Purchase of Membership Interest relating to SynAmerica I, of even date herewith,
by and among Seller, Buyer and MHSI.

                "Synfuel" means solid synthetic fuel produced by any Facility
combining coal with a chemical reagent at such Facility.

                "Tax" or "Taxes" means any taxes, assessments, fees and other
governmental charges imposed by any Governmental Authority, including income,
profits, gross receipts, net proceeds, alternative or add-on minimum, ad
valorem, value added, turnover, sales, use, property, personal property
(tangible and intangible), environmental, stamp, leasing, lease, user, excise,
duty, franchise, capital stock, transfer, registration, license, withholding,
social security (or similar), unemployment, disability, payroll, employment,
fuel, excess profits, occupational, premium, windfall profit, severance,
estimated, or other tax of any kind whatsoever, including any interest, penalty,
or addition thereto, whether disputed or not.

                "Tax Credits" means the tax credits provided by Section 29(a) of
the Code with respect to the sale of Synfuel produced by the Facilities.

                "Tax Event" has the meaning assigned to it in the Amended LLC
Agreement.

                "Tax Returns" means any return, report, statement, information
return or other document (including any amendments thereto and any related or
supporting information) filed or required to be filed with any Governmental
Authority in connection with the determination, assessment, collection or
administration of any Taxes or the administration of any laws, regulations or
administrative requirements relating to any Taxes.

                "Taxing Authority" means, with respect to any Tax, the
Governmental Authority that imposes such Tax, and the agency (if any) charged
with the collection of such Tax for such entity or subdivision, including any
Governmental Authority that imposes, or is charged with collecting, social
security or similar charges or premiums.

                "Termination Date" means the effective date specified in the
Termination Notice, which shall not be longer than 60 days after the occurrence
of such Tax Event, and in any event no later than December 31, 2003.

                "Termination Notice" means a notice given by Buyer to the
Operating Company and to MHSI before the close of business on December 31, 2003
specifying (i) that a Tax Event as set forth in the last sentence of the
definition of Tax Event has occurred, (ii) that Buyer elects to terminate this
Agreement with the effects provided in Sections 2.5(g) and 6.1(b) hereof and
(iii) the Termination Date.

                "Third Party Claim" has the meaning set forth in Section 7.3.

                "Transaction Documents" means this Agreement and each other
agreement, document and instrument required to be executed or entered into in
accordance herewith or pursuant to the earlier transfer of an 0.1% interest to
Buyer.

<PAGE>

                "Variable Deferred Payment" has the meaning set forth in Section
2.5(a).