Document:

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                                                                    Exhibit 10.1

                          FOURTH AMENDMENT TO AMENDED
                         AND RESTATED CREDIT AGREEMENT

     THIS FOURTH AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT (this
"Amendment") is dated as of October 27, 2000 by and among TREX COMPANY, LLC, a
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Delaware limited liability company ("Borrower"), TREX COMPANY, INC., a Delaware
                                     --------
corporation ("Guarantor") and FIRST UNION NATIONAL BANK, a national banking
              ---------
association ("Bank").
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                                R E C I T A L S

     A.   Borrower, Guarantor and Bank are parties to that certain Amended and
Restated Credit Agreement dated as of August 3, 1999, as amended by that certain
First Amendment to Amended and Restated Credit Agreement dated as of December
15, 1999, that certain Second Amendment to Amended and Restated Credit Agreement
dated as of April 27, 2000 and that certain Third Amendment to Amended and
Restated Credit Agreement dated as of June 30, 2000 (the "Credit Agreement").
                                                          ----------------

     B.   Borrower, Guarantor and Bank have agreed to amend the Credit Agreement
by increasing the Revolving Commitment.

                               A G R E E M E N T

     NOW THEREFORE, in consideration of the mutual covenants herein and for Ten
Dollars and other good and valuable consideration, the receipt and adequacy of
which are hereby acknowledged, the parties hereto hereby agree as follows:

     1.   Incorporation of Recitals. The Recitals set forth above are
          -------------------------
incorporated herein by this reference as if fully set forth in the text of this
Amendment.

     2.   Definitions. Capitalized terms used in this Amendment and not
          -----------
otherwise defined herein shall have the meanings set forth in the Credit
Agreement.

     3.   Amendment. The definition of "Revolving Commitment" in the Definitions
          ---------
Appendix to the Credit Agreement is hereby deleted in its entirety and the
following new definition is substituted therefor:

               "Revolving Commitment" means (i) from October 27, 2000 until and
               including September 30, 2001, $75,000,000, and (ii) from October
               1, 2001 and thereafter, $50,000,000.

     Borrower agrees that if, at any time (including October 1, 2001 when the
Revolving Commitment is reduced to $50,000,000), the unpaid principal balance of
the Revolving Loans exceeds the Revolving Commitment, Borrower shall immediately
pay to Bank the amount of such excess.
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     4.   Representations and Warranties. Each of Borrower and Guarantor hereby
          ------------------------------
confirms to Bank that all representations and warranties of Borrower and
Guarantor contained in the Credit Agreement are true and correct as if made on
the date hereof.

     5.   Effectiveness. This Amendment shall be and become effective as of the
          -------------
date hereof when all of the conditions set forth below in this paragraph 5 shall
have been satisfied:

          a.   The Bank shall have received this Amendment, duly executed by the
Borrower and the Guarantor.

          b.   All fees and expenses of the Bank in connection with this
Amendment, including legal fees and expenses incurred on or prior to the date of
this Amendment, shall have been paid by the Borrower.

          c.   The Bank shall have received an opinion of counsel for the
Borrower and the Guarantor in form satisfactory to the Bank.

     6.   Full Force and Effect. Except as specifically set forth herein, all
          ---------------------
terms and conditions of the Credit Agreement and the other Loan Documents shall
remain unchanged and in full force and effect.

     7.   Binding Effect. Each of Borrower and Guarantor hereby reaffirms its
          --------------
covenant and agreement to perform, comply with and be bound by each and every
one of the terms and provisions of the Credit Agreement, as modified by this
Amendment.

     8.   Acknowledgment; No Novation. Borrower, Guarantor and Bank agree that
          ---------------------------
this Amendment shall not constitute a novation of the indebtedness evidenced by
the Term Note or any of the other Obligations.

     9.   Successors and Assigns. This Amendment shall be binding upon and shall
          ----------------------
inure to the benefit of the parties hereto and their respective heirs,
executors, administrators, personal representatives, successors and assigns.

     10.  Severability. In case any one or more of the provisions contained in
          ------------
this Amendment shall be invalid, illegal or unenforceable, the validity and
enforceability of the remaining provisions contained herein shall not in any way
be affected or impaired thereby.

     11.  Counterparts. This Amendment may be executed by the parties hereto in
          ------------
two counterparts, each of which shall be deemed an original and both of which
shall constitute together but one and the same agreement.
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     The undersigned have caused this Amendment to be executed in the names and
under the seals of the undersigned, with the intent that this be a sealed
instrument.

                                        BORROWER:

                                        TREX COMPANY, LLC, a Delaware limited
                                        liability company

                                        By: /s/ A.J. Cavanna
                                           _______________________________(SEAL)
                                           Anthony J. Cavanna
                                           Chief Financial Officer

                                        GUARANTOR:

                                        TREX COMPANY, INC., a Delaware
                                        corporation

                                        By: /s/ A.J. Cavanna
                                           _______________________________(SEAL)
                                           Anthony J. Cavanna
                                           Chief Financial Officer

                                        BANK:

                                        FIRST UNION NATIONAL BANK, a national
                                        banking association

                                        By: /s/ B. Scott Arthur
                                           _______________________________(SEAL)
                                           B. Scott Arthur
                                           Vice President<PAGE>
                                                                  EXHIBIT 10.6.1

June 26, 2000

Bob O'Callahan

Dear Bob,

I am pleased to offer you a position with Salon as Senior Vice President & Chief
Financial Officer reporting to Michael O'Donnell CEO & President in our San
Francisco office. Your start date will be effective July 17, 2000. Here's a
summary of the compensation package:

     .    You will receive a monthly salary of $14,583.33 (equivalent to
          $175,000 on an annualized basis) which will be paid semi-monthly in
          accordance with Salon's normal payroll procedures.

     .    Bonus:  $25,000 (based on MBO's determined during first 30 days)

     .    You will be granted 100,000 employee incentive options (4 year
          vesting) in accordance with the company's stock option plan, subject
          to approval by the company's Board of Directors.

In case of a Salon.com merger, sale or reorganization, and your position is
eliminated, relocated or reduced you would receive one year's worth of
compensation and 1 year's accelerated vesting (in addition to the current year).

As a Salon employee you will also be eligible to receive certain employee
benefits including:

     .    An Insurance program consisting of medical, dental, vision, short term
          and long term disability and life insurance
     .    12 days paid vacation and the standard 12 Salon paid holidays
     .    401K Savings Plan
     .    Salon Employee Stock Purchase Plan

Please contact Michele Alcantara, our Employment Manager, if you have any
additional questions. She can be reached at (415) 645-9267 or at
malcantara@salon.com. The second page of this letter contains important
--------------------
information about the terms of your employment at Salon. Please read it
carefully, sign the bottom and return it to Michele. We're excited to have you
join us and we look forward to a mutually successful relationship.

Michael O'Donnell
Chief Executive Officer
Salon.com

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Terms of Employment

This offer is contingent on Salon receiving satisfactory responses from your
references. If you choose to accept this offer, your employment with Salon will
be voluntarily entered into and will be for no specified period. As a result,
you will be free to resign at any time, for any reason or for no reason, as you
deem appropriate. Salon will have a similar right and may conclude its
employment relationship with you at any time, with or without cause.

For purposes of federal immigration law, you will be required to provide Salon
with documentary evidence of your identity and eligibility for employment in the
United States. Such documentation must be provided to us within three (3)
business days of your date of hire, or our employment relationship with you may
be terminated.

Salon reserves the right to change or alter as it sees fit and at its sole
discretion the terms of your employment including but not limited to employee
benefits, your job title, rate of pay and job classification.

     In the event of any dispute or claim relating to or arising out of our
employment relationship, this agreement, or the termination of our employment
relationship (including, but not limited to, any claims of wrongful termination
or age, sex, disability, race or other discrimination), you and Salon agree that
all such disputes shall be fully, finally and exclusively resolved by binding
arbitration conducted by the American Arbitration Association in San Jose,
California. However, we agree that this arbitration provision shall not apply to
any disputes or claims relating to or arising out of the misuse or
misappropriation of Salon's trade secrets or proprietary information.

To indicate your acceptance of Salon's offer, please sign and date this letter
in the space provided below and return it to me. You will also be required to
sign an Employee Inventions and Proprietary Rights Assignment Agreement as a
condition of your employment. This offer letter and the Terms of Employment,
along with any agreements relating to proprietary rights between you and Salon,
set forth the terms of your employment with Salon and supersede any prior
representations or agreements, whether written or oral. This letter may not be
modified or amended except by a written agreement, signed by Salon and by you.

Salon.com                           Agreed to and Accepted

_______________________   ______    ______________________        _______
Michael O'Donnell         date      Bob O'Callahan                date
Chief Executive Officer

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