Document:

Exhibit 10.4

                               SUBLEASE AGREEMENT

     THIS SUBLEASE AGREEMENT ("Sublease") is executed this 1st day of April
2004, by and between The Customized Box Company, a California corporation
("Sublessor"), and American Soil Technologies, Inc., a California corporation
("Sublessee"). Sublessor and Sublessee shall hereinafter sometimes be referred
to individually as the "Party" and collectively as the "Parties."

                                    RECITALS

     A. On November 17, 2003, Sublessor, as Lessee, entered into a written lease
(hereinafter "Master Lease") for premises at 12224 Montague Street, Pacoima, CA
91331 (hereinafter "Master Premises"). A copy of the Master Lease is attached
hereto. By the terms of the Master Lease, the Master Premises are leased to
Sublessor for a term of five years, commencing on January 1, 2004, and ending on
December 31, 2008;

     B. Sublessor desires to sublease to Sublessee desires to lease
approximately 923.50 square feet of the Master Premises (herinafter, the
"Premises") under the terms of the Master Lease, and Sublessee the Premises from
Sublessor.

     C. The Lessor under the Master Lease shall consent to this Sublease by
executing the "Consent of Lessor" provision at the end of this Sublease.

     NOW THEREFORE, in consideration of the foregoing Recitals, which are made a
part of this Sublease, and the promises, conditions, and covenants contained
herein, Sublessor and Sublessee agree as follows:

     1. LEASE OF PREMISES. Subject to the terms, conditions, and covenants set
forth in this Sublease, Sublessor hereby leases to Sublessee, and Sublessee
hereby rents from Sublessor, the Premises.

     2. TERM. This Sublease shall commence on April 1, 2004 and terminate
December 31, 2008, unless sooner terminated upon written notice by either Party
or by operation of this Sublease.

     3. RENT. Sublessee shall pay to Sublessor as rent for the Premises $554 per
month payable in advance on the first day of each calendar month during the
term, commencing on April 1, 2004. Rent shall be paid to Sublessor at 12224
Montague Street, Pacoima, CA 91331 , or at any other place designated in writing
by Sublessor. Sublessee shall also pay the proportionate share of the Cost of
Living (COLA) adjustments as set forth in the Addendum to the Master Lease to be
assessed on September 1, 2005 and May 1, 2007.

     4. USE OF THE PREMISES. Sublessee shall use the subleased premises for
business office purposes.

     5. CONDITION OF PREMISES. Sublessee agrees that its act of taking
possession will be an acknowledgment that the Premises are in a tenantable and
good condition..

     6. APPLICABILITY OF MASTER LEASE. This Sublease is subject and subordinate
to the terms, conditions and limitations contained in the Master Lease.

     7. TERMINATION OF MASTER LEASE. If the Master Lease is terminated, this
Sublease shall terminate simultaneously and the Sublessor and Sublessee shall
thereafter be released from all obligations under this Sublease, and Sublessor
shall refund to Sublessee any unearned rent paid in advance.

                                       1
<PAGE>
     8. CHOICE OF LAW. This Sublease and the rights of the parties hereunder
shall be governed by and construed in accordance with the laws of the State of
California including all matters of construction, validity, performance, and
enforcement and without giving effect to the principles of conflict of laws.

     9. JURISDICTION. The parties submit to the jurisdiction of the Courts of
the County of Los Angeles, State of California or a Federal Court empaneled in
the State of California for the resolution of all legal disputes arising under
the terms of this Sublease, including, but not limited to, enforcement of any
arbitration award.

     10. COUNTERPARTS. This Sublease may be executed in several counterparts and
it shall not be necessary for each party to execute each of such counterparts,
but when all of the parties have executed and delivered one of such
counterparts, the counterparts, when taken together, shall be deemed to
constitute one and the same instrument, enforceable against each party in
accordance with its terms.

     11. FACSIMILE SIGNATURES. The parties hereto agree that this Sublease may
be executed by facsimile signatures and such signatures shall be deemed
originals.

     IN WITNESS WHEREOF this Sublease is executed on the day and year first
written above.

SUBLESSOR:

    THE CUSTOMIZED BOX COMPANY,
    a California corporation

    /s/ Richard Handren
    --------------------------
    By: Richard Handren
    Its: President

SUBLESSEE:

    AMERICAN SOIL TECHNOLOGIES, INC.,
    a Nevada corporation

    /s/ Carl P. Ranno
    --------------------------
    By: Carl P. Ranno
    Its: CEO, President

                                CONSENT OF LESSOR

    The undersigned is the Lessor under the Master Lease described in the
foregoing Sublease and hereby consents to the sublease of the Premises described
in this Sublease to American Soil Technologies, Inc., a Nevada corporation.

    /s/ Michael Lichstein
    ----------------------------
    Michael Lichstein

                                       2Century Aluminum Company

	

Exhibit 10.1  

EXECUTION COPY  

CONSENT AND SECOND
AMENDMENT TO                            
REVOLVING CREDIT AGREEMENT  

        This
CONSENT AND SECOND AMENDMENT TO REVOLVING CREDIT AGREEMENT, dated as of March 31, 2004
(this “Amendment”), is by and among (a) Century Aluminum Company, a Delaware corporation
(“Century Aluminum”), Berkeley Aluminum, Inc., a Delaware corporation (“Berkeley”),
Century Aluminum of West Virginia, Inc., a Delaware corporation (“Century WV”), Century
Kentucky, Inc., a Delaware corporation (“Century K”), Metalsco,
Ltd., a Georgia company (“Metalsco”) and NSA Ltd., a Kentucky limited
partnership (“NSA” and, together with Century Aluminum, Berkeley, Century WV, Century K and
Metalsco, collectively, the “Borrowers” and each individually a “Borrower”), (b) the
lending institutions which are or may become parties to the Credit Agreement (as defined
below) from time to time (collectively, the “Lenders”) and (c) Fleet Capital Corporation
as agent (“Agent”) for the Lenders. Capitalized terms used herein without definition
shall have the meanings assigned to such terms in the Credit Agreement referred to below.   

        WHEREAS,
the Borrowers, the Lenders and the Agent are parties to a Revolving Credit Agreement,
dated as of April 2, 2001 (as amended, restated, supplemented or otherwise modified and in
effect from time to time, the “Credit Agreement”), pursuant to which the Lenders have
committed to make loans or otherwise extend credit to the Borrowers on the terms and
subject to the conditions set forth therein;   

        WHEREAS,
Century Aluminum has entered into that certain Stock Purchase Agreement by and among
Century Aluminum, as Buyer, Columbia Ventures Corporation, a Washington corporation, as
Seller, and Nordural (as hereinafter defined), which Stock Purchase Agreement will be
amended and restated substantially in the form attached hereto as Exhibit A (as amended
and restated, the “Stock Purchase Agreement”), pursuant to which Century Aluminum shall
cause the Nordural Acquisition Subsidiary (as hereinafter defined) to consummate the
Nordural Acquisition (as hereinafter defined).   

        WHEREAS,
Century Aluminum intends to issue shares of its Common Stock, par value $.01 per share,
in a public offering (the “Offering”), with estimated net proceeds of up to $285 million
(the “Net Offering Proceeds”).  

        WHEREAS,
Century Aluminum intends to contribute or lend all or a portion of the Net Offering
Proceeds to the Nordural Acquisition Subsidiary to fund the Nordural Acquisition, to
finance a portion of a planned expansion by Nordural and to provide working capital to
Nordural (the “Nordural Investment”). Under the Credit Agreement, (i) the Nordural
Investment is not permitted and (ii) the Nordural Acquisition Subsidiary is not permitted
to consummate the Nordural Acquisition because it is a Subsidiary of Century Aluminum.   

        WHEREAS,
in accordance with the terms hereof, the Lenders and the Agent have agreed to consent to
the Nordural Investment and specify that the Nordural Acquisition Subsidiary is not a
Subsidiary of the Borrowers or the Guarantors.   

	

        NOW
THEREFORE, in consideration of the foregoing premises and for other good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged, the
Borrowers, the Lenders and the Agent hereby agree as follows:   

        §1. 
Amendment to Section 1.1 of the Credit Apreement.   

	  	        (a)
Section 1.1 of the Credit Agreement is hereby amended by adding       the following new
definitions to such Section 1.1 in the appropriate       alphabetical order:  

	  	        “Nordural.”
Nordural hf, an Icelandic company that owns and operates a primary aluminum
plant in Grundartangi, Iceland.  

	  	        “Nordural
Acquisition.” The purchase on one occasion by the Nordural Acquisition
Subsidiary of 100% of the outstanding shares of capital stock of Nordural
pursuant to the terms of the Stock Purchase Agreement.  

	  	        “Nordural
Acquisition Documents.” All agreements, documents and instruments executed
and/or delivered in connection with the Nordural Acquisition (other than the
Stock Purchase Agreement), in form and substance consistent with the Stock
Purchase Agreement.  

	  	        “Nordural
Acquisition Subsidiary.” One or more direct or indirect subsidiaries of
Century Aluminum (which are not Borrowers or Guarantors) formed for the
purpose of, and used to consummate, the Nordural Acquisition or which are
used from time to time to hold direct or indirect ownership interests in
Nordural.  

	  	        (b)
The definition of “Subsidiary” is hereby amended by deleting       such definition in its
entirety and substituting the following definition       in lieu thereof:  

	  	        “Subsidiary.
Any corporation, association, trust, or other business entity of which the
designated parent shall at any time own directly or indirectly through a
Subsidiary or Subsidiaries at least a majority (by number of votes) of the
outstanding Voting Stock; provided, however, that when used with respect to
the Borrowers and the Guarantors, the term Subsidiary shall not include the
European Subsidiary or the Nordural Acquisition Subsidiary.” 

	

        §2. 
Consent to the Nordural Investment. The Borrowers have requested that the Agent and the
Lenders consent to the Nordural Investment. Notwithstanding the provisions of Section 9.3
of the Credit Agreement which might limit or prohibit the Borrowers’ ability to make the
Nordural Investment, the Agent and the Lenders hereby consent to the Nordural Investment
in connection with the Nordural Acquisition provided that (a) the amount of the Nordural
Investment shall not exceed the amount of the Net Offering Proceeds, (b) no Letters of
Credit are issued in connection with the Nordural Acquisition and (c) for the three (3)
days immediately following the closing of the Nordural Acquisition, no Loans are
outstanding.  

-2-  

	

        §3. 
Application of Section 10.1 of the Credit Apreement. For the avoidance of doubt, the
Agent and the Lenders confirm and agree that the Nordural Investment will not be
considered to be a Capital Expenditure which would otherwise be restricted under the
terms of Section 10.1 of the Credit Agreement.   

        §4. 
Conditions to Effectiveness. This Amendment shall become effective upon the satisfaction
of each of the following conditions precedent; provided that if the Stock Purchase
Agreement is terminated by Buyer or Seller (as defined therein) pursuant to Article XI
thereof, this Amendment shall be null and void:   

	  	        (a)
the Agent shall have received a counterpart signature page to       this Amendment duly
executed and delivered by each of the Borrowers and       the Majority Lenders;  

	  	        (b)
the Agent shall have received an executed copy of the Stock       Purchase Agreement
which shall be substantially in accord with the draft       Stock Purchase Agreement
attached hereto as Exhibit A with such material       deviations or changes as are
otherwise satisfactory to the Agent;  

	  	        (c)
the Agent shall have received evidence reasonably satisfactory       to the Agent that
the Offering has been consummated; and  

	  	        (d)
the Agent shall have received payment from the Borrowers, for       the account of each
Lender which returns an executed counterpart signature       page to this Amendment to
the Agent on or prior to 5:00pm (Chicago time)       on March 31, 2004, of an amendment
fee equal to $5,000 for each such       Lender.  

	

        §5. 
Affirmation of the Borrowers. Each of the Borrowers hereby affirms all of its Obligations
under the Credit Agreement and under each of the other Loan Documents to which it is a
party and hereby affirms its absolute and unconditional promise to pay to the Lenders
such Loans and other amounts as may be due under the Credit Agreement (as amended hereby)
and the other Loan Documents.   

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

	  	        (a)
Representations and Warranties. Each of the representations and warranties
contained in Section 7 of the Credit Agreement were true and correct in all
material respects when made, and, after giving effect to this amendment, are true
and correct in all material respects on and as of the date hereof, except to the
extent of changes resulting from transactions contemplated or permitted by the
Credit Agreement (as amended hereby) and the other Loan Documents, changes
occurring in the ordinary course of business that singly or in the aggregate do not
result in a Material Adverse Effect and to the extent that such representations and
warranties relate specifically to a prior date.  

	  	        (b)
Enforceability. The execution and delivery by each of the Borrowers of this
Amendment, and the performance by each of the Borrowers of this Amendment and the
Credit Agreement, as amended hereby, are within the corporate authority of such
Borrower and have been duly authorized by all necessary corporate proceedings. This
Amendment and the Credit Agreement, as amended hereby, constitute valid and legally
binding obligations of each of the Borrowers, enforceable against it in accordance
with their terms, except as limited by bankruptcy, insolvency,
reorganization, moratorium or similar laws relating to or affecting the
enforcement of creditors’ rights in general.  

	

-3-  

	  	        (c)
No Default. No Default or Event of Default has occurred and is continuing,
and no Default or Event of Default will result from the execution, delivery
and performance by each of the Borrowers of this Amendment or from the
consummation of the transactions contemplated herein.  

	

        §7. 
No Amendments, etc. Except as expressly provided in this Amendment, (a) all of the terms
and conditions of the Credit Agreement and the other Loan Documents remain unchanged, and
(b) all of the terms and conditions of the Credit Agreement, as amended hereby, are
hereby ratified and confirmed by each of the Borrowers and remain in full force and
effect. Nothing herein shall be construed to be an amendment, consent or a waiver of any
requirements of any of the Borrowers or of any other Person under the Credit Agreement or
any of the other Loan Documents except as expressly set forth herein. Nothing in this
Amendment shall be construed to imply any willingness on the part of the Agent or the
Lenders to grant any similar or future amendment, consent or waiver of any of the terms
and conditions of the Credit Agreement or the other Loan Documents.   

        §8. 
Execution in Counterparts. This Amendment may be executed in any number of counterparts
and by each party on a separate counterpart, each of which when so executed and delivered
shall be an original, but all of which together shall constitute one instrument. In
proving this Amendment, it shall not be necessary to produce or account for more than one
such counterpart signed by the party against whom enforcement is sought.   

        §9. 
Governing Law. This Amendment shall for all purposes be construed in accordance with and
governed by the laws of the State of New York (excluding the laws applicable to conflict
of laws, other than Section 5-1401 of the New York General Obligations Law).   

        §10. 
Miscellaneous. The captions in this Amendment are for convenience of reference only and
shall not define or limit the provisions hereof.   

        §11. 
Fees and Expenses. Each of the Borrowers agrees to pay to the Agent, on demand by the
Agent, all reasonable out-of-pocket costs and expenses incurred or sustained by the Agent
in connection with the preparation of this Amendment, including reasonable legal fees.   

        §12. 
Copies of Nordural Acquisition Documents. Century Aluminum covenants and agrees to
deliver to the Agent copies of the executed Nordural Acquisition Documents promptly after
the execution and delivery thereof.   

[Remainder of Page
Intentionally Left Blank]   

-4-  

	

        IN
WITNESS WHEREOF, the undersigned have duly executed this Amendment as a sealed instrument
as of the date first set forth above.   

	 	CENTURY ALUMINUM COMPANY
   
	 	By: 	/s/ Peter C. McGuire

———————————————

Name: Peter C. McGuire

Title:   Vice President 

	 	CENTURY ALUMINUM OF WEST VIRGINIA, INC.
   
	 	By: 	/s/ Peter C. McGuire

———————————————

Name: Peter C. McGuire

Title:   Vice President 

	 	BERKELEY ALUMINUM, INC.
   
	 	By: 	/s/ Peter C. McGuire

———————————————

Name: Peter C. McGuire

Title:   Vice President 

	 	CENTURY KENTUCKY, INC.
   
	 	By: 	/s/ Peter C. McGuire

———————————————

Name: Peter C. McGuire

Title:   Vice President 

	 	METALSCO, LTD.
   
	 	By: 	/s/ Peter C. McGuire

———————————————

Name: Peter C. McGuire

Title:   Vice President 

	

	 	NSA, Ltd., by Metalsco, LTD., 

its General Partner
   
	 	By: 	/s/ Peter C. McGuire

———————————————

Name: Peter C. McGuire

Title:   Vice President 

	

	 	FLEET CAPITAL CORPORATION,
 individually and as
Agent
  
	 	By: 	/s/ Robert J. Lund

———————————————

Name: Robert J. Lund

Title:   Senior Vice President 

	

	 	THE CIT GROUP/BUSINESS CREDIT, INC.
   
	 	By: 	/s/ Jerome P. Sepich

———————————————

Name: Jerome P. Sepich

Title:   Vice President 

	

	 	CONGRESS FINANCIAL CORPORATION
   
	 	By: 	

———————————————

Name: 

Title: Vice President 

	

	 	LASALLE BUSINESS CREDIT, LLC

(successor by merger to LaSalle

Business Credit, Inc.)
   
	 	By: 	/s/ Bent Hammeleff

———————————————

Name: Bent Hammeleff

Title:   Vice President 

	

	 	TRANSAMERICA BUSINESS CAPITAL CORPORATION
   
	 	By: 	/s/ Matthew N. McAlpine 

———————————————

Name: Matthew N. McAlpine - VP

Title:   Duly Authorized Signatory 

	

	 	CREDIT SUISSE FIRST BOSTON,

acting through its New York branch
   
	 	By: 	/s/ Alain Daoust

———————————————

Name: Alain Daoust

Title:   Director 
	 
  
	 	By: 	/s/ Peter Chauvin

———————————————

Name: Peter Chauvin

Title:   Vice President 

	

	 	CITIZENS BUSINESS CREDIT COMPANY,

a Division of Citizens Leasing, Inc.,

a Massachusetts Corporation
   
	 	By: 	/s/ Paul A. Rebholz

———————————————

Name: Paul A. Rebholz

Title:   Vice President 

	

	

        Each
of the undersigned Guarantors hereby acknowledges and consents to the foregoing Amendment
and agrees that the Guarantee, dated as of April 2, 2001, in favor of the Agent and the
Lenders remains in full force and effect and each Guarantor ratifies and confirms all of
its obligations thereunder.  

	SKYLINER,
      INC.

        
	By:     
      	/s/ Peter
      C. McGuire

      ———————————————

      Name: Peter C. McGuire

      Title:   Vice President 

	VIRGIN
      ISLANDS ALUMINA 

      CORPORATION LLC

        
	By:      
      	/s/ Peter
      C. McGuire

      ———————————————

      Name: Peter C. McGuire

      Title:   Vice President 

	

Exhibit A   

[See attached Amended
and Restated Stock Purchase Agreement]

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