Document:

Exhibit 10.10

                               SECURITY AGREEMENT

     This Agreement, dated as of May 23, 2006, is made by and between Tradestar
Services, Inc., a Nevada corporation (the "Debtor"), and Wells Fargo Bank,
National Association (the "Secured Party"), acting through its Wells Fargo
Business Credit operating division.

     Pursuant to a Credit and Security Agreement dated as of May 23, 2006 (as
the same may be amended, supplemented or restated from time to time, the "Credit
Agreement"), the Secured Party may extend credit accommodations to Tradestar
Construction Services, Inc., a New Mexico corporation ("Tradestar"), and
Petroleum Engineers, Inc., a Louisiana corporation ("Petroleum Engineers", and
together with Tradestar, the "Borrower").

     As a condition to extending credit to the Borrower, the Secured Party has
required the execution and delivery of the Debtor's Guaranty of even date
herewith, guaranteeing the payment and performance of all obligations of the
Borrower arising under or pursuant to the Credit Agreement (the "Guaranty").

     As a further condition to extending credit to the Borrower under the Credit
Agreement, the Secured Party has required the execution and delivery of this
Agreement by the Debtor.

     ACCORDINGLY, in consideration of the mutual covenants contained in the
Credit Agreement, the Guaranty and herein, the parties hereby agree as follows:

1.    Definitions. All terms defined in the recitals hereto and the Credit
Agreement that are not otherwise defined herein shall have the meanings given
them in the recitals and the Credit Agreement. All terms defined in the UCC and
not otherwise defined herein have the meanings assigned to them in the UCC. In
addition, the following terms have the meanings set forth below or in the
referenced Section of this Agreement:

     "Accounts" means all of the Debtor's accounts, as such term is defined in
the UCC, including each and every right of the Debtor to the payment of money,
whether such right to payment now exists or hereafter arises, whether such right
to payment arises out of a sale, lease or other disposition of goods or other
property, out of a rendering of services, out of a loan, out of the overpayment
of taxes or other liabilities, or otherwise arises under any contract or
agreement, whether such right to payment is created, generated or earned by the
Debtor or by some other Person who subsequently transfers such Person's interest
to the Debtor, whether such right to payment is or is not already earned by
performance, and howsoever such right to payment may be evidenced, together with
all other rights and interests (including all Liens) which the Debtor may at any
time have by law or agreement against any account debtor or other obligor
obligated to make any such payment or against any property of such account
debtor or other obligor; all including but not limited to all present and future
accounts, contract rights, loans and obligations receivable, chattel papers,
bonds, notes and other debt instruments, tax refunds and rights to payment in
the nature of general intangibles.

<PAGE>

     "Collateral" means, whether now owned or existing or hereafter acquired or
arising or in which the Debtor now has or hereafter acquires any rights, all of
the Debtor's Accounts, chattel paper, deposit accounts, documents, Equipment,
General Intangibles, goods, instruments, Inventory, Investment Property,
letter-of-credit rights, letters of credit, all sums on deposit in any
Collateral Account, and any items in any Lockbox; together with (i) all
substitutions and replacements for and products of any of the foregoing; (ii) in
the case of all goods, all accessions; (iii) all accessories, attachments,
parts, equipment and repairs now or hereafter attached or affixed to or used in
connection with any goods; (iv) all warehouse receipts, bills of lading and
other documents of title now or hereafter covering such goods; (v) all
collateral subject to the Lien of Secured Party; (vi) any money, or other assets
of the Debtor that now or hereafter come into the possession, custody, or
control of the Secured Party; and (vii) proceeds of any and all of the
foregoing, provided, however, that in no event shall the Debtor's membership
interests in Tradestar Acquisition Sub, L.L.C., a Nevada limited liability
company, be included in the definition of Collateral under this Agreement.

     "Equipment" means all of the Debtor's equipment, as such term is defined in
the UCC, whether now owned or hereafter acquired, including but not limited to
all present and future machinery, vehicles, furniture, fixtures, manufacturing
equipment, shop equipment, office and recordkeeping equipment, parts, tools,
supplies, and including specifically the goods described in any equipment
schedule or list herewith or hereafter furnished to the Secured Party by the
Debtor.

     "Event of Default" has the meaning given in Section 6.

     "General Intangibles" means all of the Debtor's general intangibles, as
such term is defined in the UCC, whether now owned or hereafter acquired,
including all present and future Intellectual Property Rights, customer or
supplier lists and contracts, manuals, operating instructions, permits,
franchises, the right to use the Debtor's name, and the goodwill of the Debtor's
business.

     "Intellectual Property Rights" means all actual or prospective rights
arising in connection with any intellectual property or other proprietary
rights, including all rights arising in connection with copyrights, patents,
service marks, trade dress, trade secrets, trademarks, trade names or mask
works.

     "Inventory" means all of the Debtor's inventory, as such term is defined in
the UCC, whether now owned or hereafter acquired, whether consisting of whole
goods, spare parts or components, supplies or materials, whether acquired, held
or furnished for sale, for lease or under service contracts or for manufacture
or processing, and wherever located.

     "Investment Property" means all of the Debtor's investment property, as
such term is defined in the UCC, whether now owned or hereafter acquired,
including but not limited to all securities, security entitlements, securities
accounts, commodity contracts, commodity accounts, stocks, bonds, mutual fund
shares, money market shares and U.S. Government securities.

                                      -2-
<PAGE>

     "Lien" means any security interest, mortgage, deed of trust, pledge, lien,
charge, encumbrance, title retention agreement or analogous instrument or
device, including the interest of each lessor under any capitalized lease and
the interest of any bondsman under any payment or performance bond, in, of or on
any assets or properties of a Person, whether now owned or hereafter acquired
and whether arising by agreement or operation of law.

     "Obligations" means each and every debt, liability and obligation of every
type and description which the Debtor may now or at any time hereafter owe to
the Secured Party, whether such debt, liability or obligation now exists or is
hereafter created or incurred and whether it is or may be direct or indirect,
due or to become due, or absolute or contingent, including without limitation
all obligations under the Guaranty.

     "Permitted Liens" means (i) the Security Interest, (ii) covenants,
restrictions, rights, easements and minor irregularities in title which do not
materially interfere with the Debtor's business or operations as presently
conducted, and (iii) Liens in existence on the date hereof and described on
Exhibit C hereto.

     "Security Interest" has the meaning given in Section 2.

     "UCC" means the Uniform Commercial Code as in effect from time to time in
the State of Colorado.

2.    Security Interest. The Debtor hereby grants the Secured Party a security
interest (the "Security Interest") in the Collateral to secure payment of the
Obligations.

3.   Representations, Warranties and Agreements. The Debtor hereby represents,
warrants and agrees as follows:

     (a) Title. The Debtor (i) has absolute title to each item of Collateral in
existence on the date hereof, free and clear of all Liens except the Permitted
Liens, (ii) will have, at the time the Debtor acquires any rights in Collateral
hereafter arising, absolute title to each such item of Collateral free and clear
of all Liens except Permitted Liens, (iii) will keep all Collateral free and
clear of all Liens except Permitted Liens, and (iv) will defend the Collateral
against all claims or demands of all Persons other than the Secured Party and
the holders of Permitted Liens. The Debtor will not sell or otherwise dispose of
the Collateral or any interest therein, outside the ordinary course of business,
without the prior written consent of the Secured Party.

     (b) Chief Executive Office; Identification Number. The Debtor's chief
executive office and principal place of business is located at the address set
forth under its signature below. The Debtor's federal employer identification
number and organization identification number is correctly set forth under its
signature below.

     (c) Location of Collateral. As of the date hereof, the tangible Collateral
is located only in the states and at the address, as identified on Exhibit A
attached hereto. The Debtor will not permit any tangible Collateral to be
located in any state (and, if county filing is required, in any county) in which
a financing statement covering such Collateral is required to be, but has not in
fact been, filed in order to perfect the Security Interest.

                                      -3-
<PAGE>

     (d) Changes in Name, Constituent Documents, Location. The Debtor will not
change its name, Constituent Documents, or jurisdiction of organization without
the prior written consent of the Secured Party. The Debtor will not change its
business address, without prior written notice to the Secured Party.

     (e) Fixtures. The Debtor will not permit any tangible Collateral to become
part of or to be affixed to any real property without first assuring to the
reasonable satisfaction of the Secured Party that the Security Interest will be
prior and senior to any Lien then held or thereafter acquired by any mortgagee
of such real property or the owner or purchaser of any interest therein. If any
part or all of the tangible Collateral is now or will become so related to
particular real estate as to be a fixture, the real estate concerned and the
name of the record owner are accurately set forth in Exhibit B hereto.

     (f) Rights to Payment. Each right to payment and each instrument, document,
chattel paper and other agreement constituting or evidencing Collateral is (or
will be when arising, issued or assigned to the Secured Party) the valid,
genuine and legally enforceable obligation, subject to no defense, setoff or
counterclaim (other than those arising in the ordinary course of business), of
the account debtor or other obligor named therein or in the Debtor's records
pertaining thereto as being obligated to pay such obligation. The Debtor will
neither agree to any material modification or amendment nor agree to any
forbearance, release or cancellation of any such obligation, and will not
subordinate any such right to payment to claims of other creditors of such
account debtor or other obligor.

     (g) Commercial Tort Claims. Promptly upon knowledge thereof, the Debtor
will deliver to the Secured Party notice of any commercial tort claims it may
bring against any Person, including the name and address of each defendant, a
summary of the facts, an estimate of the Debtor's damages, copies of any
complaint or demand letter submitted by the Debtor, and such other information
as the Secured Party may request. Upon request by the Secured Party, the Debtor
will grant the Secured Party a security interest in all commercial tort claims
it may have against any Person.

     (h) Miscellaneous Covenants. The Debtor will:

          (i) keep all tangible Collateral in good repair, working order and
     condition, normal depreciation excepted, and will, from time to time,
     replace any worn, broken or defective parts thereof;

          (ii) promptly pay all taxes and other governmental charges levied or
     assessed upon or against any Collateral or upon or against the creation,
     perfection or continuance of the Security Interest;

          (iii) at all reasonable times, permit the Secured Party or its
     representatives to examine or inspect any Collateral, wherever located, and
     to examine, inspect and copy the Debtor's books and records pertaining to
     the Collateral and its business and financial condition and to send and
     discuss with account debtors and other obligors requests for verifications
     of amounts owed to the Debtor;

                                      -4-
<PAGE>

          (iv) keep accurate and complete records pertaining to the Collateral
     and pertaining to the Debtor's business and financial condition and submit
     to the Secured Party such periodic reports concerning the Collateral and
     the Debtor's business and financial condition as the Secured Party may from
     time to time reasonably request;

          (v) promptly notify the Secured Party of any loss of or material
     damage to any Collateral or of any adverse change, known to the Debtor, in
     the prospect of payment of any sums due on or under any instrument, chattel
     paper, or account constituting Collateral;

          (vi) if the Secured Party at any time so requests (after the
     occurrence of an Event of Default), promptly deliver to the Secured Party
     any instrument, document or chattel paper constituting Collateral, duly
     endorsed or assigned by the Debtor;

          (vii) at all times keep all tangible Collateral insured against risks
     of fire (including so-called extended coverage), theft, collision (in case
     of Collateral consisting of motor vehicles) and such other risks and in
     such amounts as the Secured Party may reasonably request, with any such
     policies containing a lender loss payable endorsement acceptable to the
     Secured Party;

          (viii) from time to time authorize or execute such financing
     statements as the Secured Party may reasonably require in order to perfect
     the Security Interest and, if any Collateral consists of a motor vehicle,
     execute such documents as may be required to have the Security Interest
     properly noted on a certificate of title;

          (ix) pay when due or reimburse the Secured Party on demand for all
     costs of collection of any of the Obligations and all other out-of-pocket
     expenses (including in each case all reasonable attorneys' fees) incurred
     by the Secured Party in connection with the creation, perfection,
     satisfaction, protection, defense or enforcement of the Security Interest
     or the creation, continuance, protection, defense or enforcement of this
     Agreement or any or all of the Obligations, including expenses incurred in
     any litigation or bankruptcy or insolvency proceedings;

          (x) authorize, execute, deliver or endorse any and all instruments,
     documents, assignments, security agreements and other agreements and
     writings which the Secured Party may at any time reasonably request in
     order to secure, protect, perfect or enforce the Security Interest and the
     Secured Party's rights under this Agreement; and

          (xi) not use or keep any Collateral, or permit it to be used or kept,
     for any unlawful purpose or in violation of any federal, state or local
     law, statute or ordinance.

     (i) Secured Party's Right to Take Action. The Debtor authorizes the Secured
Party to file from time to time where permitted by law, such financing
statements against collateral described as "all personal property" as the
Secured Party deems necessary or useful to perfect the Security Interest. The
Debtor will not amend any financing statements in favor of the Secured Party
except as permitted by law. Further, if the Debtor at any time fails to perform

                                      -5-
<PAGE>

or observe any agreement contained in Section 3(h), and if such failure
continues for a period of ten (10) days after the Secured Party gives the Debtor
written notice thereof (or, in the case of the agreements contained in clauses
(vii) and (viii) of Section 3(h), immediately upon the occurrence of such
failure, without notice or lapse of time), the Secured Party may (but need not)
perform or observe such agreement on behalf and in the name, place and stead of
the Debtor (or, at the Secured Party's option, in the Secured Party's own name)
and may (but need not) take any and all other actions which the Secured Party
may reasonably deem necessary to cure or correct such failure (including,
without limitation the payment of taxes, the satisfaction of security interests,
liens, or encumbrances, the performance of obligations under contracts or
agreements with account debtors or other obligors, the procurement and
maintenance of insurance, the execution of financing statements, the endorsement
of instruments, the qualification and licensing of the Debtor to do business in
any jurisdiction, and the procurement of repairs or transportation); and, except
to the extent that the effect of such payment would be to render any loan or
forbearance of money usurious or otherwise illegal under any applicable law, the
Debtor shall thereupon pay the Secured Party on demand the amount of all moneys
expended and all costs and expenses (including reasonable attorneys' fees)
incurred by the Secured Party in connection with or as a result of the Secured
Party's performing or observing such agreements or taking such actions, together
with interest thereon from the date expended or incurred by the Secured Party at
the highest rate then applicable to any of the Obligations. To facilitate the
performance or observance by the Secured Party of such agreements of the Debtor,
the Debtor hereby irrevocably appoints (which appointment is coupled with an
interest) the Secured Party, or its delegate, as the attorney-in-fact of the
Debtor with the right (but not the duty) from time to time to create, prepare,
complete, execute, deliver, endorse or file, in the name and on behalf of the
Debtor, any and all instruments, documents, financing statements, applications
for insurance and other agreements and writings required to be obtained,
executed, delivered or endorsed by the Debtor under this Section 3 and
Section 4.

4.    Rights of Secured Party. At any time and from time to time, whether before
or after an Event of Default, the Secured Party may take any or all of the
following actions:

     (a) Account Verification. The Secured Party may at any time and from time
to time send or require the Debtor to send requests for verification of accounts
or notices of assignment to account debtors and other obligors. The Secured
Party may also at any time and from time to time telephone account debtors and
other obligors to verify accounts.

     (b) Collateral Account. The Secured Party may establish a collateral
account for the deposit of checks, drafts and cash payments made by the Debtor's
account debtors. If a collateral account is so established, the Debtor shall
promptly deliver to the Secured Party, for deposit into said collateral account,
all payments on Accounts and chattel paper received by it. All such payments
shall be delivered to the Secured Party in the form received (except for the
Debtor's endorsement where necessary). Until so deposited, all payments on
Accounts and chattel paper received by the Debtor shall be held in trust by the
Debtor for and as the property of the Secured Party and shall not be commingled
with any funds or property of the Debtor. All deposits in said collateral
account shall constitute proceeds of Collateral and shall not constitute payment
of any Obligation. Unless otherwise agreed in writing, the Debtor shall have no
right to withdraw amounts on deposit in any collateral account.

                                      -6-
<PAGE>

     (c) Lockbox. The Secured Party may, by notice to the Debtor, require the
Debtor to direct each of its account debtors to make payment directly to a
special lockbox to be under the control of the Secured Party. The Debtor hereby
authorizes and directs the Secured Party to deposit all checks, drafts and cash
payments received in said lockbox into the collateral account established as set
forth above.

     (d) Direct Collection. The Secured Party may notify any account debtor, or
any other Person obligated to pay any amount due, that such chattel paper,
Account, or other right to payment has been assigned or transferred to the
Secured Party for security and shall be paid directly to the Secured Party. At
any time after the Secured Party or the Debtor gives such notice to an account
debtor or other obligor, the Secured Party may (but need not), in its own name
or in the Debtor's name, demand, sue for, collect or receive any money or
property at any time payable or receivable on account of, or securing, any such
chattel paper, Account, or other right to payment, or grant any extension to,
make any compromise or settlement with or otherwise agree to waive, modify,
amend or change the obligations (including collateral obligations) of any such
account debtor or other obligor.

5.    Assignment of Insurance. The Debtor hereby assigns to the Secured Party,
as additional security for the payment of the Obligations, any and all moneys
(including but not limited to proceeds of insurance and refunds of unearned
premiums) due or to become due under, and all other rights of the Debtor under
or with respect to, any and all policies of insurance covering the Collateral,
and the Debtor hereby directs the issuer of any such policy to pay any such
moneys directly to the Secured Party. After the occurrence of an Event of
Default, the Secured Party may (but need not), in its own name or in the
Debtor's name, execute and deliver proofs of claim, receive all such moneys,
endorse checks and other instruments representing payment of such moneys, and
adjust, litigate, compromise or release any claim against the issuer of any such
policy.

6.    Events of Default. Each of the following occurrences shall constitute an
event of default under this Agreement (herein called "Event of Default"): (i) an
Event of Default shall occur under the Credit Agreement; or (ii) the Debtor
shall fail to pay any or all of the Obligations when due or (if payable on
demand) on demand; or (iii) the Debtor shall fail to observe or perform any
covenant or agreement herein binding on it.

7.    Remedies upon Event of Default. Upon the occurrence of an Event of Default
and at any time thereafter, the Secured Party may exercise any one or more of
the following rights and remedies: (i) declare all unmatured Obligations to be
immediately due and payable, and the same shall thereupon be immediately due and
payable, without presentment or other notice or demand; (ii) exercise and
enforce any or all rights and remedies available upon default to a secured party
under the UCC, including but not limited to the right to take possession of any
Collateral, proceeding without judicial process or by judicial process (without
a prior hearing or notice thereof, which the Debtor hereby expressly waives),
and the right to sell, lease or otherwise dispose of any or all of the
Collateral, and in connection therewith, the Secured Party may require the
Debtor to make the Collateral available to the Secured Party at a place to be
designated by the Secured Party which is reasonably convenient to both parties,
and if notice to the Debtor of any intended disposition of Collateral or any
other intended action is required by law in a particular instance, such notice
shall be deemed commercially reasonable if given (in the manner specified in

                                      -7-
<PAGE>

Section 9) at least ten (10) days prior to the date of intended disposition or
other action; (iii) exercise or enforce any or all other rights or remedies
available to the Secured Party by law or agreement against the Collateral,
against the Debtor or against any other Person or property. The Secured Party is
hereby granted a nonexclusive, worldwide and royalty-free license to use or
otherwise exploit all Intellectual Property Rights owned by or licensed to the
Debtor that the Secured Party deems necessary or appropriate to the disposition
of any Collateral.

8.    Other Personal Property. Unless at the time the Secured Party takes
possession of any tangible Collateral, or within seven days thereafter, the
Debtor gives written notice to the Secured Party of the existence of any goods,
papers or other property of the Debtor, not affixed to or constituting a part of
such Collateral, but which are located or found upon or within such Collateral,
describing such property, the Secured Party shall not be responsible or liable
to the Debtor for any action taken or omitted by or on behalf of the Secured
Party with respect to such property.

9.    Notices; Requests for Accounting. All notices and other communications
hereunder shall be in writing and shall be (a) personally delivered, (b) sent by
first class United States mail, (c) sent by overnight courier of national
reputation, or (d) transmitted by telecopy, in each case addressed or telecopied
to the party to whom notice is being given at its address or telecopier number
as set forth below its signature or, as to each party, at such other address or
telecopier number as may hereafter be designated by such party in a written
notice to the other party complying as to delivery with the terms of this
Section. All such notices, requests, demands and other communications shall be
deemed to have been given on (i) the date received if personally delivered, (ii)
when deposited in the mail if delivered by mail, (iii) the date sent if sent by
overnight courier, or (iv) the date of transmission if delivered by telecopy.
All requests under Section 9-210 of the UCC (i) shall be made in a writing
signed by an authorized Person, (ii) shall be personally delivered, sent by
registered or certified mail, return receipt requested, or by overnight courier
of national reputation (iii) shall be deemed to be sent when received by the
Secured Party and (iv) shall otherwise comply with the requirements of Section
9-210. The Debtor requests that the Secured Party respond to all such requests
which on their face appear to come from an authorized individual and releases
the Secured Party from any liability for so responding. The Debtor shall pay
Secured Party the maximum amount allowed by law for responding to such requests.

10.    Miscellaneous. This Agreement has been duly and validly authorized by all
necessary corporate action. This Agreement does not contemplate a sale of
accounts, or chattel paper. This Agreement can be waived, modified, amended,
terminated or discharged, and the Security Interest can be released, only
explicitly in a writing signed by the Secured Party, and, in the case of
amendment or modification, in a writing signed by the Debtor. A waiver signed by
the Secured Party shall be effective only in the specific instance and for the
specific purpose given. Mere delay or failure to act shall not preclude the
exercise or enforcement of any of the Secured Party's rights or remedies. All
rights and remedies of the Secured Party shall be cumulative and may be
exercised singularly or concurrently, at the Secured Party's option, and the
exercise or enforcement of any one such right or remedy shall neither be a

                                      -8-
<PAGE>

condition to nor bar the exercise or enforcement of any other. The Secured
Party's duty of care with respect to Collateral in its possession (as imposed by
law) shall be deemed fulfilled if the Secured Party exercises reasonable care in
physically safekeeping such Collateral or, in the case of Collateral in the
custody or possession of a bailee or other third person, exercises reasonable
care in the selection of the bailee or other third person, and the Secured Party
need not otherwise preserve, protect, insure or care for any Collateral. The
Secured Party shall not be obligated to preserve any rights the Debtor may have
against prior parties, to realize on the Collateral at all or in any particular
manner or order, or to apply any cash proceeds of Collateral in any particular
order of application. This Agreement shall be binding upon and inure to the
benefit of the Debtor and the Secured Party and their respective successors and
assigns and shall take effect when signed by the Debtor and delivered to the
Secured Party, and the Debtor waives notice of the Secured Party's acceptance
hereof. The Secured Party may execute this Agreement if appropriate for the
purpose of filing, but the failure of the Secured Party to execute this
Agreement shall not affect or impair the validity or effectiveness of this
Agreement. A carbon, photographic or other reproduction of this Agreement or of
any financing statement signed by the Debtor shall have the same force and
effect as the original for all purposes of a financing statement. This Agreement
shall be governed by and construed in accordance with the substantive laws
(other than conflict laws) of the State of Colorado. If any provision or
application of this Agreement is held unlawful or unenforceable in any respect,
such illegality or unenforceability shall not affect other provisions or
applications which can be given effect and this Agreement shall be construed as
if the unlawful or unenforceable provision or application had never been
contained herein or prescribed hereby. All representations and warranties
contained in this Agreement shall survive the execution, delivery and
performance of this Agreement and the creation and payment of the Obligations.
The parties hereto hereby (i) consent to the personal jurisdiction of the state
and federal courts located in the State of Colorado in connection with any
controversy related to this Agreement; (ii) waive any argument that venue in any
such forum is not convenient, (iii) agree that any litigation initiated by the
Secured Party or the Debtor in connection with this Agreement or the other Loan
Documents may be venued in either the state or federal courts located in the
City and County of Denver, Colorado; and (iv) agree that a final judgment in any
such suit, action or proceeding shall be conclusive and may be enforced in other
jurisdictions by suit on the judgment or in any other manner provided by law.

11.    THE PARTIES WAIVE ANY RIGHT TO TRIAL BY JURY IN ANY ACTION OR PROCEEDING
BASED ON OR PERTAINING TO THIS AGREEMENT.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the date and year first above written.

                      [This Space Intentionally Left Blank]

                                      -9-
<PAGE>

WELLS FARGO BANK, NATIONAL ASSOCIATION, acting through its TRADESTAR SERVICES,
INC Wells Fargo Business Credit operating division

  By:      /s/ Martin E. Tracey              By:      /s/ Frederick A. Huttner
           ---------------------                      ------------------------
  Name:    Martin E. Tracy                   Name:    Frederick A. Huttner

  Its:     Vice President                    Its:     Secretary and Treasurer

  Address:                                   Address:

  Wells Fargo Business Credit, Inc.          3451 Candelaria, NE, Suite A
  MAC C7300-210                              Albuquerque, New Mexico  87107
  1740 Broadway                              Attention: Frederick "Rick" Huttner
  Denver, Colorado  80274
  Attention: Martin E. Tracy

                                      -10-
<PAGE>

                                    EXHIBIT A

                             LOCATION OF COLLATERAL
                             ----------------------

                          3451 Candelaria, NE, Suite A
                          Albuquerque, New Mexico 87107

                                       A-1
<PAGE>

                                    EXHIBIT B

                                LEGAL DESCRIPTION
                                -----------------

Suite No. 3451-A as outlined on the plan attached as Exhibit A to the Lease
between Tradestar Construction Services, Inc., a New Mexico corporation and
Candelaria Business Park Associates, LP, a New Mexico limited partnership, in
the building known as the Candelaria Business Center located on the land
described on Exhibit B attached to the Lease and whose street address is 3451
Candelaria NE, Albuquerque, New Mexico 87107

                                       B-1
<PAGE>

                                    EXHIBIT C

                                 PERMITTED LIENS
                                 ---------------

                                      None

                                       C-1Exhibit 10.11

================================================================================

                          CREDIT AND SECURITY AGREEMENT

                                 BY AND BETWEEN

                     TRADESTAR CONSTRUCTION SERVICES, INC.,
                            PETROLEUM ENGINEERS, INC.

                                       AND

                     WELLS FARGO BANK, NATIONAL ASSOCIATION
        Acting through its WELLS FARGO BUSINESS CREDIT operating division

                                  May 23, 2006
================================================================================

<PAGE>
                                TABLE OF CONTENTS

ARTICLE I DEFINITIONS........................................................1

         Section 1.1       Definitions.......................................1
         Section 1.2       Other Definitional Terms; Rules of
                             Interpretation.................................11

ARTICLE II AMOUNT AND TERMS OF THE CREDIT FACILITY..........................11

         Section 2.1       Revolving Advances...............................11
         Section 2.2       Procedures for Requesting Revolving Advances.....12
         Section 2.3       Letters of Credit................................12
         Section 2.4       Special Account..................................13
         Section 2.5       Interest; Minimum Interest Charge; Default
                           Interest Rate; Application of Payments;
                           Participations; Usury............................13
         Section 2.6       Fees.............................................14
         Section 2.7       Time for Interest Payments; Payment on
                           Non-Business Days; Computation of Interest
                           and Fees.........................................16
         Section 2.8       Lockbox and Collateral Account; Sweep of Funds...17
         Section 2.9       Voluntary Prepayment; Reduction of the
                           Maximum Line Amount; Termination of the
                           Credit Facility by the Borrower..................17
         Section 2.10      Mandatory Prepayment.............................18
         Section 2.11      Revolving Advances to Pay Obligations............18
         Section 2.12      Use of Proceeds..................................18
         Section 2.13      Liability Records................................18

ARTICLE III SECURITY INTEREST; OCCUPANCY; SETOFF............................18

         Section 3.1       Grant of Security Interest.......................18
         Section 3.2       Notification of Account Debtors and Other
                           Obligors.........................................19
         Section 3.3       Assignment of Insurance..........................19
         Section 3.4       Occupancy........................................19
         Section 3.5       License..........................................20
         Section 3.6       Financing Statement..............................20
         Section 3.7       Setoff...........................................21
         Section 3.8       Collateral.......................................21

ARTICLE IV CONDITIONS OF LENDING............................................21

                                        i
<PAGE>

         Section 4.1       Conditions Precedent to the Initial Revolving
                           Advances and Letter of Credit....................21
         Section 4.2       Conditions Precedent to All Revolving Advances
                           and Letters of Credit............................24

ARTICLE V REPRESENTATIONS AND WARRANTIES....................................24

         Section 5.1       Existence and Power; Name; Chief Executive
                           Office; Inventory and Equipment Locations;
                           Federal Employer Identification Number and
                           Organizational Identification Number.............24
         Section 5.2       Capitalization...................................25
         Section 5.3       Authorization of Borrowing; No Conflict as
                           to Law or Agreements.............................25
         Section 5.4       Legal Agreements.................................25
         Section 5.5       Subsidiaries.....................................25
         Section 5.6       Financial Condition; No Adverse Change...........25
         Section 5.7       Litigation.......................................26
         Section 5.8       Regulation U.....................................26
         Section 5.9       Taxes............................................26
         Section 5.10      Titles and Liens.................................26
         Section 5.11      Intellectual Property Rights.....................26
         Section 5.12      Plans............................................27
         Section 5.13      Default..........................................28
         Section 5.14      Environmental Matters............................28
         Section 5.15      Submissions to the Lender........................29
         Section 5.16      Financing Statements.............................29
         Section 5.17      Rights to Payment................................29
         Section 5.18      Financial Solvency...............................29

ARTICLE VI COVENANTS........................................................30

         Section 6.1       Reporting Requirements...........................30
         Section 6.2       Financial Covenants..............................33
         Section 6.3       Permitted Liens; Financing Statements............35
         Section 6.4       Indebtedness.....................................36
         Section 6.5       Guaranties.......................................36
         Section 6.6       Investments and Subsidiaries.....................36
         Section 6.7       Dividends and Distributions......................37
         Section 6.8       Salaries.........................................37
         Section 6.9       Books and Records; Collateral Examination,
                           Inspection and Appraisals........................37
         Section 6.10      Account Verification.............................37
         Section 6.11      Compliance with Laws.............................38
         Section 6.12      Payment of Taxes and Other Claims................38
         Section 6.13      Maintenance of Properties........................38
         Section 6.14      Insurance........................................39
         Section 6.15      Preservation of Existence........................39
         Section 6.16      Delivery of Instruments, etc.....................39
         Section 6.17      Sale or Transfer of Assets; Suspension of
                           Business Operations..............................39
         Section 6.18      Consolidation and Merger; Asset Acquisitions.....40
         Section 6.19      Sale and Leaseback...............................40
         Section 6.20      Restrictions on Nature of Business...............40
         Section 6.21      Accounting.......................................40
         Section 6.22      Discounts, etc...................................40
         Section 6.23      Plans............................................40

                                       ii
<PAGE>

         Section 6.24      Place of Business; Name..........................40
         Section 6.25      Constituent Documents; S Corporation Status......40
         Section 6.26      Performance by the Lender........................40

ARTICLE VII EVENTS OF DEFAULT, RIGHTS AND REMEDIES..........................41

         Section 7.1       Events of Default................................41
         Section 7.2       Rights and Remedies..............................43
         Section 7.3       Certain Notices..................................44

ARTICLE VIII MISCELLANEOUS..................................................44

         Section 8.1       No Waiver; Cumulative Remedies; Compliance
                           with Laws........................................44
         Section 8.2       Amendments, Etc..................................44
         Section 8.3       Notices; Communication of Confidential
                           Information; Requests for Accounting.............45
         Section 8.4       Further Documents................................45
         Section 8.5       Costs and Expenses...............................45
         Section 8.6       Indemnity........................................46
         Section 8.7       Participants.....................................46
         Section 8.8       Execution in Counterparts; Telefacsimile
                           Execution........................................46
         Section 8.9       Retention of the Borrower's Records..............47
         Section 8.10      Binding Effect; Assignment; Complete
                           Agreement; Sharing Information...................47
         Section 8.11      Severability of Provisions.......................47
         Section 8.12      Headings.........................................47
         Section 8.13      Governing Law; Jurisdiction, Venue; Waiver
                           of Jury Trial....................................47
         Section 8.14      Joint and Several Liability......................48

                                       iii
<PAGE>

                          CREDIT AND SECURITY AGREEMENT

                            Dated as of May 23, 2006

     TRADESTAR CONSTRUCTION SERVICES, INC., a New Mexico corporation
("Tradestar"), PETROLEUM ENGINEERS, INC., a Louisiana corporation ("Petroleum
Engineers", and together with Tradestar, the "Borrower"), and WELLS FARGO BANK,
NATIONAL ASSOCIATION (the "Lender"), acting through its WELLS FARGO BUSINESS
CREDIT operating division, hereby agree as follows:

                                    ARTICLE I

                                   DEFINITIONS
                                   -----------

     Section 1.1 Definitions. Except as otherwise expressly provided in this
Agreement, the following terms shall have the meanings given them in this
Section:

     "Accounts" shall have the meaning given it under the UCC.

     "Accounts Advance Rate" means up to eighty-five percent (85%), or such
lesser rate as the Lender in its sole discretion may deem appropriate from time
to time.

     "Affiliate" or "Affiliates" means Tradestar Services, Inc., and any other
Person controlled by, controlling or under common control with the Borrower,
including any Subsidiary of the Borrower. For purposes of this definition,
"control," when used with respect to any specified Person, means the power to
direct the management and policies of such Person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise.

     "Agreement" means this Credit and Security Agreement.

     "Aggregate Face Amount" is defined in Section 2.6(e).

     "Availability" means Tradestar Availability plus Petroleum Engineers
Availability, which amount shall not exceed at any time the Maximum Line Amount
less the sum of (i) the outstanding principal balance of the Revolving Note and
(ii) the L/C Amount.

     "Book Net Worth" means the aggregate of the common and preferred
shareholders' or Owners' equity in the Borrower, determined in accordance with
GAAP.

     "Borrowing Base" means at any time the lesser of (i) the Maximum Line
Amount or (ii) the Tradestar Borrowing Base plus the Petroleum Engineers
Borrowing Base.

     "Borrowing Base Reserve" means, as of any date of determination, such
amounts (expressed as either a specified amount or as a percentage of a
specified category or item) as the Lender may from time to time establish and
adjust in reducing Availability (a) to reflect events, conditions, contingencies
or risks which, as determined by the Lender, do or may affect (i) the Collateral
or its value, (ii) the assets, business or prospects of the Borrower, or (iii)

<PAGE>

the security interests and other rights of the Lender in the Collateral
(including the enforceability, perfection and priority thereof), or (b) to
reflect the Lender's judgment that any collateral report or financial
information furnished by or on behalf of the Borrower to the Lender is or may
have been incomplete, inaccurate or misleading in any material respect, or (c)
in respect of any state of facts that the Lender determines constitutes a
Default or an Event of Default.

     "Business Day" means a day on which the Federal Reserve Bank of New York is
open for business.

     "Capital Expenditures" means for a period, any expenditure of money during
such period for the lease of any other asset whether payable currently or in the
future.

     "Change of Control" means the occurrence of any of the following events:

          (a) Any Person or "group" (as such term is used in Sections 13(d) and
     14(d) of the Securities Exchange Act of 1934) is or becomes the "beneficial
     owner" (as defined in Rules 13d-3 and 13d-5 under the Securities Exchange
     Act of 1934, except that a Person will be deemed to have "beneficial
     ownership" of all securities that such Person has the right to acquire,
     whether such right is exercisable immediately or only after the passage of
     time), directly or indirectly, of more than ten percent (10%) of the voting
     power of all classes of Owners of the Borrower;

          (b) During any consecutive two-year period, individuals who at the
     beginning of such period constituted the board of Directors of the Borrower
     (together with any new Directors whose election to such board of Directors,
     or whose nomination for election by the Owners of the Borrower, was
     approved by a vote of two thirds of the Directors then still in office who
     were either Directors at the beginning of such period or whose election or
     nomination for election was previously so approved) cease for any reason to
     constitute a majority of the board of Directors of the Borrower then in
     office; or

          (c) Frederick "Rick" Huttner and/or Clarence Downs shall cease to
     actively manage the Borrower's day-to-day business activities.

     "Collateral" means all of the Borrower's Accounts, chattel paper and
electronic chattel paper, deposit accounts, documents, Equipment, General
Intangibles, goods, instruments, Inventory, Investment Property,
letter-of-credit rights, letters of credit, all sums on deposit in any
Collateral Account, and any items in any Lockbox; together with (i) all
substitutions and replacements for and products of any of the foregoing; (ii) in
the case of all goods, all accessions; (iii) all accessories, attachments,
parts, equipment and repairs now or hereafter attached or affixed to or used in
connection with any goods; (iv) all warehouse receipts, bills of lading and
other documents of title now or hereafter covering such goods; (v) all
collateral subject to the Lien of any Security Document; (vi) any money, or
other assets of the Borrower that now or hereafter come into the possession,
custody, or control of the Lender; (vii) all sums on deposit in the Special
Account; (viii) proceeds of any and all of the foregoing; (ix) books and records
of the Borrower, including all mail or electronic mail addressed to the
Borrower; and (x) all of the foregoing, whether now owned or existing or
hereafter acquired or arising or in which the Borrower now has or hereafter
acquires any rights.

                                      -2-
<PAGE>

     "Collateral Account" means the "Lender Account" as defined in the Wholesale
Lockbox and Collection Account Agreement and the "Collection Account" as defined
in the Collection Account Agreement.

     "Collection Account Agreement" means the Collection Account Agreement by
and between Tradestar and the Lender, dated the same date as this Agreement.

     "Commercial Letter of Credit Agreement" means an agreement governing the
issuance of documentary letters of credit by the Lender, entered into between
the Borrower as applicant and the Lender as issuer.

     "Commitment" means the Lender's commitment to make Revolving Advances to,
and to issue Letters of Credit for the account of, the Borrower.

     "Constituent Documents" means with respect to any Person, as applicable,
such Person's certificate of incorporation, articles of incorporation, by-laws,
certificate of formation, articles of organization, limited liability company
agreement, management agreement, operating agreement, shareholder agreement,
partnership agreement or similar document or agreement governing such Person's
existence, organization or management or concerning disposition of ownership
interests of such Person or voting rights among such Person's owners.

     "Credit Facility" means the credit facility under which Revolving Advances
and Letters of Credit may be made available to the Borrower by the Lender under
Article II.

     "Cut-off Time" means 11:00 a.m., Denver, Colorado time.

     "Debt" means of a Person as of a given date, all items of indebtedness or
liability which in accordance with GAAP would be included in determining total
liabilities as shown on the liabilities side of a balance sheet for such Person
and shall also include the aggregate payments required to be made by such Person
at any time under any lease that is considered a capitalized lease under GAAP.

     "Default" means an event that, with giving of notice or passage of time or
both, would constitute an Event of Default.

     "Default Period" means any period of time beginning on the day a Default or
Event of Default occurs and ending on the date identified by the Lender in
writing as the date that such Default or Event of Default has been cured or
waived.

     "Default Rate" means an annual interest rate in effect during a Default
Period or following the Termination Date, which interest rate shall be equal to
three percent (3%) over the applicable Floating Rate, as such rate may change
from time to time.

     "Director" means a director if the Borrower is a corporation, a governor or
manager if the Borrower is a limited liability company, or a general partner if
the Borrower is a partnership.

     "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended from time to time.

                                      -3-
<PAGE>

     "ERISA Affiliate" means any trade or business (whether or not incorporated)
that is a member of a group which includes the Borrower and which is treated as
a single employer under Section 414 of the IRC.

     "Eligible Accounts" means all unpaid Accounts of the Borrower arising from
the sale or lease of goods or the performance of services, net of any credits,
but excluding any such Accounts having any of the following characteristics:

          (i) That portion of Accounts unpaid 90 days or more after the invoice
     date or, if the Lender in its discretion has determined that a particular
     dated Account may be eligible, that portion of such Account which is unpaid
     more than 60 days past the stated due date or more than 90 days past the
     invoice date;

          (ii) That portion of Accounts related to goods or services with
     respect to which the Borrower has received notice of a claim or dispute,
     which are subject to a claim of offset or a contra account, or which
     reflect a reasonable reserve for warranty claims or returns;

          (iii) That portion of Accounts not yet earned by the final delivery of
     goods or rendition of services, as applicable, by the Borrower to the
     customer, including progress billings, and that portion of Accounts for
     which an invoice has not been sent to the applicable account debtor;

          (iv) Accounts constituting (i) proceeds of copyrightable material
     unless such copyrightable material shall have been registered with the
     United States Copyright Office, or (ii) proceeds of patentable inventions
     unless such patentable inventions have been registered with the United
     States Patent and Trademark Office;

          (v) Accounts owed by any unit of government, whether foreign or
     domestic (provided, however, that there shall be included in Eligible
     Accounts that portion of Accounts owed by such units of government for
     which the Borrower has provided evidence satisfactory to the Lender that
     (A) the Lender has a first priority perfected security interest and (B)
     such Accounts may be enforced by the Lender directly against such unit of
     government under all applicable laws);

          (vi) Accounts owed by an account debtor located outside the United
     States which are not (A) backed by a bank letter of credit naming the
     Lender as beneficiary or assigned to the Lender, in the Lender's possession
     or control, and with respect to which a control agreement concerning the
     letter-of-credit rights is in effect, and acceptable to the Lender in all
     respects, in its sole discretion, or (B) covered by a foreign receivables
     insurance policy acceptable to the Lender in its sole discretion;

          (vii) Accounts denominated in any currency other than United States
     dollars;

          (viii) Accounts owed by an account debtor that is insolvent, the
     subject of bankruptcy proceedings or has gone out of business;

                                      -4-
<PAGE>

          (ix) Accounts owed by an Owner, Subsidiary, Affiliate, Officer or
     employee of the Borrower;

          (x) Accounts not subject to a duly perfected security interest in the
     Lender's favor or which are subject to any Lien in favor of any Person
     other than the Lender;

          (xi) That portion of Accounts that has been restructured, extended,
     amended or modified;

          (xii) That portion of Accounts that constitutes advertising, finance
     charges, service charges or sales or excise taxes;

          (xiii) Accounts owed by an account debtor other than Aspect Resources,
     Remington Oil and Gas, or Walter Oil and Gas, regardless of whether
     otherwise eligible, to the extent that the aggregate balance of Accounts
     owed by such account debtor exceeds 15% of the aggregate amount of all
     Accounts;

          (xiv) Accounts owed by Aspect Resources, Remington Oil and Gas, or
     Walter Oil and Gas, regardless of whether otherwise eligible, to the extent
     that the aggregate balance of Accounts owed by such account debtor exceeds
     20% of the aggregate amount of all Accounts;

          (xv) Accounts owed by an account debtor, regardless of whether
     otherwise eligible, if 10% or more of the total amount of Accounts due from
     such debtor is ineligible under clauses (i), (ii), or (xi) above; and

          (xvi) Accounts, or portions thereof, otherwise deemed ineligible by
     the Lender in its sole discretion.

     "Environmental Law" means any federal, state, local or other governmental
statute, regulation, law or ordinance dealing with the protection of human
health and the environment.

     "Equipment" shall have the meaning given it under the UCC.

     "Event of Default" is defined in Section 7.1.

     "Financial Covenants" means the covenants set forth in Section 6.2.

     "Floating Rate" means, with respect to Revolving Advances evidenced by the
Revolving Note, an annual interest rate equal to the sum of the Prime Rate plus
one percent (1.0%), which interest rate shall change when and as the Prime Rate
changes.

     "Floating Rate Advance" means a Revolving Advance bearing interest at the
Floating Rate.

     "Funding Date" means the date that all of the conditions set forth in
Section 4.1 are satisfied.

                                      -5-
<PAGE>

     "GAAP" means generally accepted accounting principles, applied on a basis
consistent with the accounting practices applied in the financial statements
described in Section 5.6.

     "General Intangibles" shall have the meaning given it under the UCC.

     "Guarantor(s)" means Tradestar Services, Inc., and any other Person now or
in the future guaranteeing the Obligations.

     "Guaranty" means each unconditional continuing guaranty or unconditional
continuing guaranty by corporation executed by a Guarantor in favor of the
Lender (collectively, the "Guaranties").

     "Hazardous Substances" means pollutants, contaminants, hazardous
substances, hazardous wastes, petroleum and fractions thereof, and all other
chemicals, wastes, substances and materials listed in, regulated by or
identified in any Environmental Law.

     "IRC" means the Internal Revenue Code of 1986, as amended from time to
time.

     "Indemnified Liabilities" is defined in Section 8.6.

     "Indemnitees" is defined in Section 8.6.

     "Infringement" or "Infringing" when used with respect to Intellectual
Property Rights means any infringement or other violation of Intellectual
Property Rights.

     "Intellectual Property Rights" means all actual or prospective rights
arising in connection with any intellectual property or other proprietary
rights, including all rights arising in connection with copyrights, patents,
service marks, trade dress, trade secrets, trademarks, trade names or mask
works.

     "Interest Payment Date" is defined in Section 2.7(a).

     "Inventory" shall have the meaning given it under the UCC.

     "Investment Property" shall have the meaning given it under the UCC.

     "L/C Amount" means the sum of (i) the Aggregate Face Amount of any issued
and outstanding Letters of Credit and (ii) the unpaid amount of the Obligation
of Reimbursement.

     "L/C Application" means an application for the issuance of standby or
documentary letters of credit pursuant to the terms of a Standby Letter of
Credit Agreement or a Commercial Letter of Credit Agreement, in form acceptable
to the Lender.

     "Letter of Credit" is defined in Section 2.3(a).

     "Licensed Intellectual Property" is defined in Section 5.11(c).

     "Lien" means any security interest, mortgage, deed of trust, pledge, lien,
charge, encumbrance, title retention agreement or analogous instrument or
device, including the interest of each lessor under any capitalized lease and

                                      -6-
<PAGE>

the interest of any bondsman under any payment or performance bond, in, of or on
any assets or properties of a Person, whether now owned or subsequently acquired
and whether arising by agreement or operation of law.

     "Loan Documents" means this Agreement, the Note, the Guaranties, the
Subordination Agreement, and the Security Documents, together with every other
agreement, note, document, contract or instrument to which the Borrower now or
in the future may be a party and which is required by the Lender.

     "Lockbox" means "Lockbox" as defined in the Wholesale Lockbox and
Collection Account Agreement.

     "Material Adverse Effect" means any of the following:

          (i) A material adverse effect on the business, operations, results of
     operations, assets, liabilities or financial condition of the Borrower;

          (ii) A material adverse effect on the ability of the Borrower to
     perform its obligations under the Loan Documents; or

          (iii) A material adverse effect on the ability of the Lender to
     enforce the Obligations or to realize the intended benefits of the Security
     Documents, including a material adverse effect on the validity or
     enforceability of any Loan Document or of any rights against any Guarantor,
     or on the status, existence, perfection, priority (subject to Permitted
     Liens) or enforceability of any Lien securing payment or performance of the
     Obligations.

     "Maturity Date" means, with respect to the Credit Facility, May 23, 2009,
as may be extended pursuant to Section 2.9.

     "Maximum Line Amount" means $5,000,000, unless this amount is reduced
pursuant to Section 2.9, in which event it means such lower amount.

     "Minimum Interest Charge" is defined in Section 2.5(b).

     "Multiemployer Plan" means a multiemployer plan (as defined in Section
4001(a)(3) of ERISA) to which the Borrower or any ERISA Affiliate contributes or
is obligated to contribute.

     "Net Income" means fiscal year-to-date after-tax net income from continuing
operations, including extraordinary losses but excluding extraordinary gains,
all as determined in accordance with GAAP.

     "Note" means the Revolving Note.

     "Obligation of Reimbursement" means the obligation of the Borrower to
reimburse the Lender pursuant to the terms of the Standby Letter of Credit
Agreement or the Commercial Letter of Credit Agreement and any applicable L/C
Application.

                                      -7-
<PAGE>

     "Obligations" means amounts owing under the Note, the Obligation of
Reimbursement and each and every other debt, liability and obligation of every
type and description which the Borrower may now or at any time hereafter owe to
the Lender, whether such debt, liability or obligation now exists or is
hereafter created or incurred, whether it arises in a transaction involving the
Lender alone or in a transaction involving other creditors of the Borrower, and
whether it is direct or indirect, due or to become due, absolute or contingent,
primary or secondary, liquidated or unliquidated, or sole, joint, several or
joint and several, and including all indebtedness of the Borrower arising under
any Loan Document or guaranty between the Borrower and the Lender, whether now
in effect or subsequently entered into, and all Wells Fargo Bank Affiliate
Obligations.

     "Officer" means with respect to the Borrower, an officer if the Borrower is
a corporation, a manager if the Borrower is a limited liability company, or a
partner if the Borrower is a partnership.

     "OFAC" is defined in Section 6.11(c).

     "Overadvance" means the amount, if any, by which (i) the outstanding
principal balance of the Revolving Note, plus the L/C Amount, is in excess of
the then-existing Borrowing Base, (ii) the outstanding principal balance of
Revolving Advances to Tradestar under the Revolving Note, plus the L/C Amount
for Tradestar, is in excess of the then-existing Tradestar Borrowing Base, or
(iii) the outstanding principal balance of Revolving Advances to Petroleum
Engineers under the Revolving Note, plus the L/C Amount for Petroleum Engineers,
is in excess of the then-existing Petroleum Engineers Borrowing Base.

     "Owned Intellectual Property" is defined in Section 5.11(a).

     "Owner" means with respect to the Borrower, each Person having legal or
beneficial title to an ownership interest in the Borrower or a right to acquire
such an interest.

     "Pension Plan" means a pension plan (as defined in Section 3(2) of ERISA)
maintained for employees of the Borrower or any ERISA Affiliate and covered by
Title IV of ERISA.

     "Permitted Lien" and "Permitted Liens" are defined in Section 6.3(a).

     "Person" means any individual, corporation, partnership, joint venture,
limited liability company, association, joint-stock company, trust,
unincorporated organization or government or any agency or political subdivision
thereof.

     "Petroleum Engineers Availability" means the amount, if any, by which the
Petroleum Engineers Borrowing Base exceeds the sum of (i) the outstanding
principal balance of the Revolving Note and (ii) the L/C Amount.

     "Petroleum Engineers Borrowing Base" means at any time the lesser of:

          (a) The Maximum Line Amount; or

                                      -8-
<PAGE>

          (b) Subject to change from time to time in the Lender's sole
     discretion, the sum of:

               (i) the product of the Accounts Advance Rate times Petroleum
          Engineers's Eligible Accounts, less

               (ii) The Borrowing Base Reserve, less

               (iii) Obligations that Petroleum Engineers owes to the Lender
          that have not yet been advanced on the Revolving Note, and the dollar
          amount that the Lender in its reasonable discretion then determines to
          be a reasonable determination of Petroleum Engineers's credit exposure
          with respect to Wells Fargo Bank Affiliate Obligations.

     "Plan" means an employee benefit plan (as defined in Section 3(3) of ERISA)
maintained for employees of the Borrower or any ERISA Affiliate.

     "Premises" means all locations where the Borrower conducts its business or
has any rights of possession, including the locations legally described in
Exhibit C attached hereto.

     "Prime Rate" means at any time the rate of interest most recently announced
by the Lender at its principal office as its Prime Rate, with the understanding
that the Prime Rate is one of the Lender's base rates, and serves as the basis
upon which effective rates of interest are calculated for those loans making
reference thereto, and is evidenced by the recording thereof in such internal
publication or publications as the Lender may designate. Each change in the rate
of interest shall become effective on the date each Prime Rate change is
announced by the Lender.

     "Reportable Event" means a reportable event (as defined in Section 4043 of
ERISA), other than an event for which the 30-day notice requirement under ERISA
has been waived in regulations issued by the Pension Benefit Guaranty
Corporation.

     "Revolving Advance" is defined in Section 2.1.

     "Revolving Note" means the Borrower's revolving promissory note, payable to
the order of the Lender in substantially the form of Exhibit A hereto, as same
may be renewed and amended from time to time, and all replacements thereto.

     "Security Documents" means this Agreement, the Wholesale Lockbox and
Collection Account Agreement, the Collection Account Agreement and any other
document delivered to the Lender from time to time to secure the Obligations.

     "Security Interest" is defined in Section 3.1.

     "Special Account" means a specified cash collateral account maintained with
the Lender or another financial institution acceptable to the Lender in
connection with Letters of Credit, as contemplated by Section 2.4.

                                      -9-
<PAGE>

     "Standby Letter of Credit Agreement" means an agreement governing the
issuance of standby letters of credit by the Lender entered into between the
Borrower as applicant and the Lender as issuer.

     "Subordinated Creditors" means Tradestar Services, Inc., and any other
Person now or in the future who agrees to subordinate indebtedness of Borrower
held by that Person to the payment of the Obligations.

     "Subordination Agreement" means a subordination agreement executed by a
Subordinated Creditor in favor of the Lender and acknowledged by the Borrower
(together with any other subordination agreement that may be accepted by the
Lender from time to time, the "Subordination Agreements").

     "Subsidiary" means any Person of which more than 50% of the outstanding
ownership interests having general voting power under ordinary circumstances to
elect a majority of the board of directors or the equivalent of such Person,
regardless of whether or not at the time ownership interests of any other class
or classes shall have or might have voting power by reason of the happening of
any contingency, is at the time directly or indirectly owned by the Borrower, by
the Borrower and one or more other Subsidiaries, or by one or more other
Subsidiaries.

     "Termination Date" means the earliest of (i) the Maturity Date, (ii) the
date the Borrower terminates the Credit Facility, or (iii) the date the Lender
demands payment of the Obligations, following an Event of Default, pursuant to
Section 7.2.

     "Tradestar Availability" means the amount, if any, by which the Tradestar
Borrowing Base exceeds the sum of (i) the outstanding principal balance of the
Revolving Note and (ii) the L/C Amount.

     "Tradestar Borrowing Base" means at any time the lesser of:

          (a) The Maximum Line Amount; or

          (b) Subject to change from time to time in the Lender's sole
     discretion, the sum of:

               (i) the product of the Accounts Advance Rate times Tradestar's
          Eligible Accounts, less

               (ii) The Borrowing Base Reserve, less

               (iii) Obligations that Tradestar owes to the Lender that have not
          yet been advanced on the Revolving Note, and the dollar amount that
          the Lender in its reasonable discretion then determines to be a
          reasonable determination of Tradestar's credit exposure with respect
          to Wells Fargo Bank Affiliate Obligations.

                                      -10-
<PAGE>

     "UCC" means the Uniform Commercial Code as in effect in the state
designated in this Agreement as the state whose laws shall govern this
Agreement, or in any other state whose laws are held to govern this Agreement or
any portion of this Agreement.

     "Unused Amount" is defined in Section 2.6(b).

     "Wells Fargo Bank Affiliate Obligations" means all obligations,
liabilities, contingent reimbursement obligations, fees, and expenses owing by
the Borrower or its Subsidiaries to any Person that is owned in material part by
the Lender, and that relates to any service or facility extended to the Borrower
or its Subsidiaries, including: (a) credit cards, (b) credit card processing
services, (c) debit cards, and (d) purchase cards, as well as any other services
or facilities from time to time specified by the Lender, whether direct or
indirect, absolute or contingent, due or to become due, and whether existing now
or in the future.

     "Wholesale Lockbox and Collection Account Agreement" means the Wholesale
Lockbox and Collection Account Agreement by and between Petroleum Engineers and
the Lender, dated the same date as this Agreement.

     Section 1.2 Other Definitional Terms; Rules of Interpretation. The words
"hereof", "herein" and "hereunder" and words of similar import when used in this
Agreement shall refer to this Agreement as a whole and not to any particular
provision of this Agreement. All accounting terms not otherwise defined herein
have the meanings assigned to them in accordance with GAAP. All terms defined in
the UCC and not otherwise defined herein have the meanings assigned to them in
the UCC. References to Articles, Sections, subsections, Exhibits, Schedules and
the like, are to Articles, Sections and subsections of, or Exhibits or Schedules
attached to, this Agreement unless otherwise expressly provided. The words
"include", "includes" and "including" shall be deemed to be followed by the
phrase "without limitation". Unless the context in which used herein otherwise
clearly requires, "or" has the inclusive meaning represented by the phrase
"and/or". Defined terms include in the singular number the plural and in the
plural number the singular. Reference to any agreement (including the Loan
Documents), document or instrument means such agreement, document or instrument
as amended or modified and in effect from time to time in accordance with the
terms thereof (and, if applicable, in accordance with the terms hereof and the
other Loan Documents), except where otherwise explicitly provided, and reference
to any promissory note includes any promissory note which is an extension or
renewal thereof or a substitute or replacement therefor. Reference to any law,
rule, regulation, order, decree, requirement, policy, guideline, directive or
interpretation means as amended, modified, codified, replaced or reenacted, in
whole or in part, and in effect on the determination date, including rules and
regulations promulgated thereunder.

                                   ARTICLE II

                     AMOUNT AND TERMS OF THE CREDIT FACILITY
                     ---------------------------------------

     Section 2.1 Revolving Advances. The Lender agrees, subject to the terms and
conditions of this Agreement, to make advances ("Revolving Advances") to the
Borrower from time to time from the Funding Date to and until (but not
including) the Termination Date in an amount not in excess of the Maximum Line
Amount. The Lender shall have no obligation to make a Revolving Advance to the

                                      -11-
<PAGE>

extent that the amount of the requested Revolving Advance exceeds Availability.
The Borrower's obligation to repay the Revolving Advances shall be evidenced by
the Revolving Note and shall be secured by the Collateral. Within the limits set
forth in this Section 2.1, the Borrower may borrow, prepay pursuant to Section
2.9, and reborrow.

     Section 2.2 Procedures for Requesting Revolving Advances. The Borrower
shall comply with the following procedures in requesting Revolving Advances:

          (a) Time for Requests. The Borrower shall request each Revolving
     Advance not later than the Cut-off Time on the Business Day on which the
     Revolving Advance is to be made. Each request that conforms to the terms of
     this Agreement shall be effective upon receipt by the Lender, shall be in
     writing or by telephone, and shall be confirmed in writing by the Borrower
     if so requested by the Lender, by (i) an Officer of the Borrower; or (ii) a
     Person designated as the Borrower's agent by an Officer of the Borrower in
     a writing delivered to the Lender; or (iii) a Person whom the Lender
     reasonably believes to be an Officer of the Borrower or such a designated
     agent. The Borrower shall repay all Revolving Advances even if the Lender
     does not receive such confirmation and even if the Person requesting a
     Revolving Advance was not in fact authorized to do so. Any request for a
     Revolving Advance, whether written or telephonic, shall be deemed to be a
     representation by the Borrower that the conditions set forth in Section 4.2
     have been satisfied as of the time of the request.

          (b) Disbursement. Upon fulfillment of the applicable conditions set
     forth in Article IV, the Lender shall disburse the proceeds of the
     requested Revolving Advance by crediting the same to the Borrower's demand
     deposit account maintained with the Lender unless the Lender and the
     Borrower shall agree in writing to another manner of disbursement.

     Section 2.3 Letters of Credit.

          (a) The Lender agrees, subject to the terms and conditions of this
     Agreement, to issue, at any time after the Funding Date and prior to the
     Termination Date, one or more irrevocable standby or documentary letters of
     credit (each, a "Letter of Credit") for the Borrower's account. The Lender
     will not issue any Letter of Credit if the face amount of the Letter of
     Credit to be issued would exceed the lesser of:

               (i) $200,000 less the L/C Amount, or

               (ii) Availability.

     Each Letter of Credit, if any, shall be issued pursuant to a separate L/C
     Application made by the Borrower to the Lender, which must be completed in
     a manner satisfactory to the Lender. The terms and conditions set forth in
     each such L/C Application shall supplement the terms and conditions of the
     Standby Letter of Credit Agreement or the Commercial Letter of Credit
     Agreement, as applicable.

          (b) No Letter of Credit shall be issued with an expiry date later than
     one (1) year from the date of issuance or the Maturity Date in effect as of
     the date of issuance, whichever is earlier.

                                      -12-
<PAGE>

          (c) Any request for issuance of a Letter of Credit shall be deemed to
     be a representation by the Borrower that the conditions set forth in
     Section 4.2 have been satisfied as of the date of the request.

          (d) If a draft is submitted under a Letter of Credit when the Borrower
     is unable, because a Default Period exists or for any other reason, to
     obtain a Revolving Advance to pay the Obligation of Reimbursement, the
     Borrower shall pay to the Lender on demand and in immediately available
     funds, the amount of the Obligation of Reimbursement together with
     interest, accrued from the date of the draft until payment in full at the
     Default Rate. Notwithstanding the Borrower's inability to obtain a
     Revolving Advance for any reason, the Lender is irrevocably authorized, in
     its sole discretion, to make a Revolving Advance in an amount sufficient to
     discharge the Obligation of Reimbursement and all accrued but unpaid
     interest thereon.

     Section 2.4 Special Account. If the Credit Facility is terminated for any
reason while any Letter of Credit is outstanding, the Borrower shall thereupon
pay the Lender in immediately available funds for deposit in the Special Account
an amount equal to the L/C Amount plus any anticipated fees and costs. If the
Borrower fails to promptly make any such payment in the amount required
hereunder, then the Lender may make a Revolving Advance against the Credit
Facility in an amount sufficient to fulfill this obligation and deposit the
proceeds to the Special Account. The Special Account shall be an interest
bearing account either maintained with the Lender or with a financial
institution acceptable to the Lender. Any interest earned on amounts deposited
in the Special Account shall be credited to the Special Account. The Lender may
apply amounts on deposit in the Special Account at any time or from time to time
to the Obligations in the Lender's sole discretion. The Borrower may not
withdraw any amounts on deposit in the Special Account as long as the Lender
maintains a security interest therein. The Lender agrees to transfer any balance
in the Special Account to the Borrower upon the earlier of irrevocable payment
of all Obligations or when the Lender is required to release its security
interest in the Special Account under applicable law.

     Section 2.5 Interest; Minimum Interest Charge; Default Interest Rate;
Application of Payments; Participations; Usury.

          (a) Interest. Except as provided in Section 2.5(c) and Section 2.5(f),
     the principal amount of each Revolving Advance shall bear interest at a
     Floating Rate.

          (b) Minimum Interest Charge. Notwithstanding any other terms of this
     Agreement to the contrary, the Borrower shall pay to the Lender interest of
     not less than $11,667 per calendar month (the "Minimum Interest Charge")
     during the term of this Agreement, and the Borrower shall pay any
     deficiency between the Minimum Interest Charge and the amount of interest
     otherwise calculated under Section 2.5(a) on the first day of each month
     and on the Termination Date. When calculating this deficiency, the Default
     Rate, if applicable, shall be disregarded.

          (c) Default Interest Rate. At any time during any Default Period or
     following the Termination Date, in the Lender's sole discretion and without
     waiving any of its other rights or remedies, the principal of the Revolving
     Note shall bear interest at the Default Rate or such lesser rate as the
     Lender may determine, effective as of the first day of the month in which

                                      -13-
<PAGE>

     any Default Period begins through the last day of such Default Period, or
     any shorter time period that the Lender may determine. The decision of the
     Lender to impose a rate that is less than the Default Rate or to not impose
     the Default Rate for the entire duration of the Default Period shall be
     made by the Lender in its sole discretion and shall not be a waiver of any
     of its other rights and remedies, including its right to retroactively
     impose the full Default Rate for the entirety of any such Default Period or
     following the Termination Date.

          (d) Application of Payments. Payments shall be applied to the
     Obligations on the Business Day of receipt by the Lender in the Lender's
     general account, but the amount of principal paid shall continue to accrue
     interest at the interest rate applicable under the terms of this Agreement
     from the calendar day the Lender receives the payment, and continuing
     through the end of the second Business Day following receipt of the
     payment.

          (e) Participations. To the extent permitted hereunder, if any Person
     shall acquire a participation in the Revolving Advances or the Obligation
     of Reimbursement, the Borrower shall be obligated to the Lender to pay the
     full amount of all interest calculated under this Section 2.5, along with
     all other fees, charges and other amounts due under this Agreement,
     regardless if such Person elects to accept interest with respect to its
     participation at a lower rate than that calculated under this Section 2.5,
     or otherwise elects to accept less than its prorata share of such fees,
     charges and other amounts due under this Agreement.

          (f) Usury. In any event no rate change shall be put into effect which
     would result in a rate greater than the highest rate permitted by law.
     Notwithstanding anything to the contrary contained in any Loan Document,
     all agreements which either now are or which shall become agreements
     between the Borrower and the Lender are hereby limited so that in no
     contingency or event whatsoever shall the total liability for payments in
     the nature of interest, additional interest and other charges exceed the
     applicable limits imposed by any applicable usury laws. If any payments in
     the nature of interest, additional interest and other charges made under
     any Loan Document are held to be in excess of the limits imposed by any
     applicable usury laws, it is agreed that any such amount held to be in
     excess shall be considered payment of principal hereunder, and the
     indebtedness evidenced hereby shall be reduced by such amount so that the
     total liability for payments in the nature of interest, additional interest
     and other charges shall not exceed the applicable limits imposed by any
     applicable usury laws, in compliance with the desires of the Borrower and
     the Lender. This provision shall never be superseded or waived and shall
     control every other provision of the Loan Documents and all agreements
     between the Borrower and the Lender, or their successors and assigns.

     Section 2.6 Fees.

          (a) Origination Fee. The Borrower shall pay the Lender a fully earned
     and non-refundable origination fee of $50,000, due and payable upon the
     execution of this Agreement.

          (b) Unused Line Fee. For the purposes of this Section 2.6(b), "Unused
     Amount" means the Maximum Line Amount reduced by outstanding Revolving
     Advances and the L/C Amount. The Borrower agrees to pay to the Lender an
     unused line fee at the rate of one quarter of one percent (0.25%) per annum
     on the average daily Unused Amount from the Funding Date to and including
     the Termination Date, due and payable monthly in arrears on the first day
     of the month and on the Termination Date.

                                      -14-
<PAGE>

          (c) Collateral Exam Fees. The Borrower shall pay the Lender fees in
     connection with any collateral exams, audits or inspections conducted by or
     on behalf of the Lender of any Collateral or the Borrower's operations or
     business at the rates established from time to time by the Lender as its
     collateral exam fees (which fees are currently $100 per hour per collateral
     examiner), together with all actual out-of-pocket costs and expenses
     incurred in conducting any such collateral examination or inspection.

          (d) Collateral Monitoring Fees. The Borrower agrees to pay to the
     Lender a monthly Collateral monitoring fee of $400, which Collateral
     monitoring fee shall be due and payable monthly in advance on the first day
     of each month and on the Termination Date.

          (e) Letter of Credit Fees. The Borrower shall pay to the Lender a fee
     with respect to each Letter of Credit, that has been issued, if any, which
     fee shall be calculated on a per diem basis at an annual rate equal to two
     percent (2.0%) of the aggregate amount that may then be drawn under the
     Letter of Credit, assuming compliance with all conditions for drawing (the
     "Aggregate Face Amount"), from and including the date of issuance of the
     Letter of Credit until the date that the Letter of Credit terminates or is
     returned to the Lender, which fee shall be due and payable monthly in
     arrears on the first day of each month and on the date that the Letter of
     Credit terminates or is returned to the Lender; provided, however,
     effective as of the first day of the month in which any Default Period
     begins through the last day of such Default Period, or any shorter time
     period that the Lender may determine, in the Lender's sole discretion and
     without waiving any of its other rights and remedies, such fee shall
     increase to five percent (5.0%) of the Aggregate Face Amount. The foregoing
     fee shall be in addition to any and all other fees, commissions and charges
     imposed by Lender with respect to or in connection with such Letter of
     Credit.

          (f) Letter of Credit Administrative Fees. The Borrower shall pay all
     administrative fees charged by the Lender in connection with the honoring
     of drafts under any Letter of Credit, amendments thereto, transfers thereof
     and all other activity with respect to the Letters of Credit at the then -
     current rates published by the Lender for such services rendered on behalf
     of customers of the Lender generally.

          (g) Termination and Line Reduction Fees. If (i) the Lender terminates
     the Credit Facility during a Default Period, or if (ii) the Borrower
     terminates or reduces the Credit Facility as provided under Section 2.9 on
     a date prior to the Maturity Date, then the Borrower shall pay the Lender
     as liquidated damages and not as a penalty a termination fee in an amount
     equal to a percentage of the Maximum Line Amount (or the reduction of the
     Maximum Line Amount, as the case may be) calculated as follows: (A) three
     percent (3.0%) if the termination or reduction occurs on or before the
     first anniversary of the Funding Date; (B) two percent (2.0%) if the
     termination or reduction occurs after the first anniversary of the Funding
     Date, but on or before the second anniversary of the Funding Date; and (C)
     one percent (1.0%) if the termination or reduction occurs after the second
     anniversary of the Funding Date.

                                      -15-
<PAGE>

          (h) Waiver of Termination Fees. The Borrower will be excused from the
     payment of termination fees otherwise due under Section 2.6(g) if such
     termination is made (i) because of refinancing through another division of
     the Lender more than twelve (12) months after the Funding Date, (ii) so
     long as no Default Period is then in existence, within sixty (60) days of
     the Lender establishing an aggregate Borrowing Base Reserve in excess of
     $100,000 or (iii) so long as no Default Period is then in existence, within
     sixty (60) days of the Lender designating the required amounts of new
     covenants, in accordance with Section 6.2(i), at levels that are more
     restrictive than the covenants that were previously established for the
     Borrower.

          (i) Overadvance Fees. The Borrower shall pay an Overadvance fee (which
     in the case of an Overadvance of $100,000 or less, such fee shall not
     exceed $500) for each day or portion thereof during which an Overadvance
     exists, regardless of how the Overadvance arises or whether or not the
     Overadvance has been agreed to in advance by the Lender. The acceptance of
     payment of an Overadvance fee by the Lender shall not be deemed to
     constitute either consent to the Overadvance or a waiver of the resulting
     Event of Default, unless the Lender specifically consents to the
     Overadvance in writing and waives the Event of Default on whatever
     conditions the Lender deems appropriate.

          (j) Other Fees and Charges. The Lender may from time to time impose
     additional fees and charges as consideration for Revolving Advances made in
     excess of Availability or for other events that constitute an Event of
     Default or a Default hereunder, including fees and charges for the
     administration of Collateral by the Lender, and fees and charges for the
     late delivery of reports, which may be assessed in the Lender's sole
     discretion on either an hourly periodic, or flat fee basis, and in lieu of
     or in addition to imposing interest at the Default Rate.

     Section 2.7 Time for Interest Payments; Payment on Non-Business Days;
Computation of Interest and Fees.

          (a) Time For Interest Payments. Accrued and unpaid interest shall be
     due and payable on the first day of each month and on the Termination Date
     (each an "Interest Payment Date"), or if any such day is not a Business
     Day, on the next succeeding Business Day. Interest will accrue from the
     most recent date to which interest has been paid or, if no interest has
     been paid, from the date of advance to the Interest Payment Date. If an
     Interest Payment Date is not a Business Day, payment shall be made on the
     next succeeding Business Day.

          (b) Payment on Non-Business Days. Whenever any payment to be made
     hereunder shall be stated to be due on a day which is not a Business Day,
     such payment may be made on the next succeeding Business Day, and such
     extension of time shall in such case be included in the computation of
     interest on the Revolving Advances or the fees hereunder, as the case may
     be.

          (c) Computation of Interest and Fees. Interest accruing on the
     outstanding principal balance of the Revolving Advances and fees hereunder
     outstanding from time to time shall be computed on the basis of actual
     number of days elapsed in a year of 360 days.

                                      -16-
<PAGE>

     Section 2.8 Lockbox and Collateral Account; Sweep of Funds.

          (a) Lockbox and Collateral Account.

               (i) Petroleum Engineers shall instruct all account debtors to pay
          all Accounts directly to the Lockbox. If, notwithstanding such
          instructions, Petroleum Engineers receives any payments on Accounts,
          Petroleum Engineers shall deposit such payments into the Collateral
          Account. Petroleum Engineers shall also deposit all other cash
          proceeds of Collateral regardless of source or nature directly into
          the Collateral Account. Until so deposited, Petroleum Engineers shall
          hold all such payments and cash proceeds in trust for and as the
          property of the Lender and shall not commingle such property with any
          of its other funds or property. All deposits in the Collateral Account
          shall constitute proceeds of Collateral and shall not constitute
          payment of the Obligations.

               (ii) Tradestar shall deposit all payments on Accounts and all
          other cash proceeds of Collateral regardless of source or nature
          directly into the Collateral Account on a daily basis (by wire
          transfer or other electronic means). Until so deposited, Tradestar
          shall hold all such payments and cash proceeds in trust for and as the
          property of the Lender and shall not commingle such property with any
          of its other funds or property. All deposits in the Collateral Account
          shall constitute proceeds of Collateral and shall not constitute
          payment of the Obligations.

               (iii) All items deposited in the Collateral Account shall be
          subject to final payment. If any such item is returned uncollected,
          the Borrower will immediately pay the Lender, or, for items deposited
          in the Collateral Account, the bank maintaining such account, the
          amount of that item, or such bank at its discretion may charge any
          uncollected item to the Borrower's commercial account or other
          account. The Borrower shall be liable as an endorser on all items
          deposited in the Collateral Account, whether or not in fact endorsed
          by the Borrower.

          (b) Sweep of Funds. The Lender shall from time to time, in accordance
     with the Wholesale Lockbox and Collection Account Agreement, and the
     Collection Account Agreement, cause funds in the Collateral Account to be
     transferred to the Lender's general account for payment of the Obligations.
     Amounts deposited in the Collateral Account shall not be subject to
     withdrawal by the Borrower, except after payment in full and discharge of
     all Obligations.

     Section 2.9 Voluntary Prepayment; Reduction of the Maximum Line Amount;
Termination of the Credit Facility by the Borrower. Except as otherwise provided
herein, the Borrower may prepay the Revolving Advances in whole at any time or
from time to time in part. The Borrower may terminate the Credit Facility or
reduce the Maximum Line Amount at any time if it (i) gives the Lender at least
30 days advance written notice prior to the proposed Termination Date, and (ii)
pays the Lender applicable termination and Maximum Line Amount reduction fees in
accordance with Section 2.6(g). Any reduction in the Maximum Line Amount shall
be in multiples of $100,000, and with a minimum reduction of at least $500,000.
If the Borrower terminates the Credit Facility or reduces the Maximum Line
Amount to zero, all Obligations shall be immediately due and payable, and if the
Borrower gives the Lender less than the required 30 days advance written notice,
then the interest rate applicable to borrowings evidenced by Revolving Note

                                      -17-
<PAGE>

shall be the Default Rate for the period of time commencing 30 days prior to the
proposed Termination Date through the date that the Lender actually receives
such written notice. If the Borrower would like the Lender to consider renewal
of the Credit Facility on the next Maturity Date, then the Borrower shall give
the Lender at least 60 days written notice prior to the Maturity Date that it
will be requesting renewal, and the Lender shall advise the Borrower no later
than 30 days prior to the Maturity Date as to whether it will or will not be
granting such renewal.

     Section 2.10 Mandatory Prepayment. Without notice or demand, if an
Overadvance arises, the Borrower shall (i) first, immediately prepay the
Revolving Advances to the extent necessary to eliminate such Overadvance; and
(ii) if prepayment in full of the Revolving Advances is insufficient to
eliminate such Overadvance, pay to the Lender in immediately available funds for
deposit in the Special Account an amount equal to the remaining Overadvance. Any
payment received by the Lender hereunder or under Section 2.9 may be applied to
the Obligations, in such order and in such amounts as the Lender in its sole
discretion may determine from time to time.

     Section 2.11 Revolving Advances to Pay Obligations. Notwithstanding the
terms of Section 2.1, the Lender may, in its discretion at any time or from time
to time, without the Borrower's request and even if the conditions set forth in
Section 4.2 would not be satisfied, make a Revolving Advance in an amount equal
to the portion of the Obligations from time to time due and payable, and may
deliver the proceeds of any such Revolving Advance to any affiliate of the
Lender in satisfaction of any Wells Fargo Bank Affiliate Obligations.

     Section 2.12 Use of Proceeds. The Borrower shall use the proceeds of
Revolving Advances and each Letter of Credit to refinance existing lenders of
Tradestar and for ordinary working capital purposes.

     Section 2.13 Liability Records. The Lender may maintain from time to time,
at its discretion, records as to the Obligations. All entries made on any such
record shall be presumed correct until the Borrower establishes the contrary.
Upon the Lender's demand, the Borrower will admit and certify in writing the
exact principal balance of the Obligations that the Borrower then asserts to be
outstanding. Any billing statement or accounting rendered by the Lender shall be
conclusive and fully binding on the Borrower unless the Borrower gives the
Lender specific written notice of exception within 30 days after receipt.

                                   ARTICLE III

                      SECURITY INTEREST; OCCUPANCY; SETOFF
                      ------------------------------------

     Section 3.1 Grant of Security Interest. The Borrower hereby pledges,
assigns and grants to the Lender for the benefit of itself and as agent for any
affiliate of the Lender that may provide credit or services to the Borrower that
constitute Wells Fargo Bank Affiliate Obligations, a lien and security interest
(collectively referred to as the "Security Interest") in the Collateral, as
security for the payment and performance of the Obligations. Upon request by the
Lender, the Borrower will grant the Lender, for the benefit of itself and as
agent for any affiliate of the Lender that may provide credit or services to the
Borrower that constitute Wells Fargo Bank Affiliate Obligations, a security
interest in all commercial tort claims that the Borrower may have against any
Person.

                                      -18-
<PAGE>

     Section 3.2 Notification of Account Debtors and Other Obligors. The Lender
may at any time (whether or not a Default Period then exists) notify any account
debtor or other Person obligated to pay the amount due that such right to
payment has been assigned or transferred to the Lender for security and shall be
paid directly to the Lender. The Borrower will join in giving such notice if the
Lender so requests. At any time after the Borrower or the Lender gives such
notice to an account debtor or other obligor, the Lender may, but need not, in
the Lender's name or in the Borrower's name, demand, sue for, collect or receive
any money or property at any time payable or receivable on account of, or
securing, any such right to payment, or grant any extension to, make any
compromise or settlement with or otherwise agree to waive, modify, amend or
change the obligations (including collateral obligations) of any such account
debtor or other obligor. The Lender may, in the Lender's name or in the
Borrower's name, as the Borrower's agent and attorney-in-fact, notify the United
States Postal Service to change the address for delivery of the Borrower's mail
to any address designated by the Lender, otherwise intercept the Borrower's
mail, and receive, open and dispose of the Borrower's mail, applying all
Collateral as permitted under this Agreement and holding all other mail for the
Borrower's account or forwarding such mail to the Borrower's last known address.

     Section 3.3 Assignment of Insurance. As additional security for the payment
and performance of the Obligations, the Borrower hereby assigns to the Lender
any and all monies (including proceeds of insurance and refunds of unearned
premiums) due or to become due under, and all other rights of the Borrower with
respect to, any and all policies of insurance now or at any time hereafter
covering the Collateral or any evidence thereof or any business records or
valuable papers pertaining thereto, and the Borrower hereby directs the issuer
of any such policy to pay all such monies directly to the Lender. At any time,
whether or not a Default Period then exists, the Lender may (but need not), in
the Lender's name or in the Borrower's name, execute and deliver proof of claim,
receive all such monies, endorse checks and other instruments representing
payment of such monies, and adjust, litigate, compromise or release any claim
against the issuer of any such policy. Any monies received as payment for any
loss under any insurance policy mentioned above (other than liability insurance
policies) or as payment of any award or compensation for condemnation or taking
by eminent domain, shall be paid over to the Lender to be applied, at the option
of the Lender, either to the prepayment of the Obligations or shall be disbursed
to the Borrower under staged payment terms reasonably satisfactory to the Lender
for application to the cost of repairs, replacements, or restorations. Any such
repairs, replacements, or restorations shall be effected with reasonable
promptness and shall be of a value at least equal to the value of the items or
property destroyed prior to such damage or destruction.

     Section 3.4 Occupancy.

          (a) The Borrower hereby irrevocably grants to the Lender the right to
     take exclusive possession of the Premises at any time during a Default
     Period without notice or consent.

          (b) The Lender may use the Premises only to hold, process,
     manufacture, sell, use, store, liquidate, realize upon or otherwise dispose
     of goods that are Collateral and for other purposes that the Lender may in
     good faith deem to be related or incidental purposes.

                                      -19-
<PAGE>

          (c) The Lender's right to hold the Premises shall cease and terminate
     upon the earlier of (i) payment in full and discharge of all Obligations
     and termination of the Credit Facility, and (ii) final sale or disposition
     of all goods constituting Collateral and delivery of all such goods to
     purchasers.

          (d) The Lender shall not be obligated to pay or account for any rent
     or other compensation for the possession, occupancy or use of any of the
     Premises; provided, however, that if the Lender does pay or account for any
     rent or other compensation for the possession, occupancy or use of any of
     the Premises, the Borrower shall reimburse the Lender promptly for the full
     amount thereof. In addition, the Borrower will pay, or reimburse the Lender
     for, all taxes, fees, duties, imposts, charges and expenses at any time
     incurred by or imposed upon the Lender by reason of the execution,
     delivery, existence, recordation, performance or enforcement of this
     Agreement or the provisions of this Section 3.4.

     Section 3.5 License. Without limiting the generality of any other Security
Document, the Borrower hereby grants to the Lender a non-exclusive, worldwide
and royalty-free license to use or otherwise exploit all Intellectual Property
Rights of the Borrower for the purpose of: (a) completing the manufacture of any
in-process materials during any Default Period so that such materials become
saleable Inventory, all in accordance with the same quality standards previously
adopted by the Borrower for its own manufacturing and subject to the Borrower's
reasonable exercise of quality control; and (b) selling, leasing or otherwise
disposing of any or all Collateral during any Default Period.

     Section 3.6 Financing Statement. The Borrower authorizes the Lender to file
from time to time, such financing statements against collateral described as
"all personal property" or "all assets" or describing specific items of
collateral including commercial tort claims as the Lender deems necessary or
useful to perfect the Security Interest. All financing statements filed before
the date hereof to perfect the Security Interest were authorized by the Borrower
and are hereby re-authorized. A carbon, photographic or other reproduction of
this Agreement or of any financing statements signed by the Borrower is
sufficient as a financing statement and may be filed as a financing statement in
any state to perfect the security interests granted hereby. For this purpose,
the Borrower represents and warrants that the following information is true and
correct:

          Name and address of Debtor:

          Tradestar Construction Services Inc.
          3451 Candelaria, NE, Suite A
          Albuquerque, New Mexico  87107
          Federal Employer Identification No.  85-0481248
          Organizational Identification No.  NM 2157410

          Petroleum Engineers, Inc.
          500 Dover Boulevard, Suite 310
          Lafayette, Louisiana  70503
          Federal Employer Identification No.  72-0945167
          Organizational Identification No.  LA33808570D

                                      -20-
<PAGE>

          Name and address of Secured Party:

          Wells Fargo Bank, National Association,
          acting through its Wells Fargo Business Credit operating division
          MAC C7300-210
          1740 Broadway
          Denver, Colorado  80274

     Section 3.7 Setoff. The Lender may at any time or from time to time, at its
sole discretion and without demand and without notice to anyone, setoff any
liability owed to the Borrower by the Lender, whether or not due, against any
Obligation, whether or not due. In addition, each other Person holding a
participating interest in any Obligations shall have the right to appropriate or
setoff any deposit or other liability then owed by such Person to the Borrower,
whether or not due, and apply the same to the payment of said participating
interest, as fully as if such Person had lent directly to the Borrower the
amount of such participating interest.

     Section 3.8 Collateral. This Agreement does not contemplate a sale of
accounts, contract rights or chattel paper, and, as provided by law, the
Borrower is entitled to any surplus and shall remain liable for any deficiency.
The Lender's duty of care with respect to Collateral in its possession (as
imposed by law) shall be deemed fulfilled if it exercises reasonable care in
physically keeping such Collateral, or in the case of Collateral in the custody
or possession of a bailee or other third Person, exercises reasonable care in
the selection of the bailee or other third Person, and the Lender need not
otherwise preserve, protect, insure or care for any Collateral. The Lender shall
not be obligated to preserve any rights the Borrower may have against prior
parties, to realize on the Collateral at all or in any particular manner or
order or to apply any cash proceeds of the Collateral in any particular order of
application. The Lender has no obligation to clean-up or otherwise prepare the
Collateral for sale. The Borrower waives any right it may have to require the
Lender to pursue any third Person for any of the Obligations.

                                   ARTICLE IV

                              CONDITIONS OF LENDING
                              ---------------------

     Section 4.1 Conditions Precedent to the Initial Revolving Advances and
Letter of Credit. The Lender's obligation to make the initial Revolving Advances
or to cause any Letters of Credit to be issued shall be subject to the condition
precedent that the Lender shall have received all of the following, each
properly executed by the appropriate party and in form and substance
satisfactory to the Lender:

          (a) This Agreement.

          (b) The Note.

          (c) A Standby Letter of Credit Agreement and a Commercial Letter of
     Credit Agreement, and L/C Application for each Letter of Credit that the
     Borrower wishes to have issued thereunder.

                                      -21-
<PAGE>

          (d) A true and correct copy of any and all leases pursuant to which
     the Borrower is leasing the Premises, together with a landlord's disclaimer
     and consent with respect to each such lease.

          (e) A true and correct copy of any and all mortgages pursuant to which
     the Borrower has mortgaged the Premises, together with a mortgagee's
     disclaimer and consent with respect to each such mortgage, if any.

          (f) A true and correct copy of any and all agreements pursuant to
     which the Borrower's property is in the possession of any Person other than
     the Borrower, together with, in the case of any goods held by such Person
     for resale, (i) a consignee's acknowledgment and waiver of Liens, (ii) UCC
     financing statements sufficient to protect the Borrower's and the Lender's
     interests in such goods, and (iii) UCC searches showing that no other
     secured party has filed a financing statement against such Person and
     covering property similar to the Borrower's other than the Borrower, or if
     there exists any such secured party, evidence that each such secured party
     has received notice from the Borrower and the Lender sufficient to protect
     the Borrower's and the Lender's interests in the Borrower's goods from any
     claim by such secured party, if any.

          (g) An acknowledgment and waiver of Liens from each warehouse in which
     the Borrower is storing Inventory, if any.

          (h) A true and correct copy of any and all agreements pursuant to
     which the Borrower's property is in the possession of any Person other than
     the Borrower, together with, (i) an acknowledgment and waiver of Liens from
     each subcontractor who has possession of the Borrower's goods from time to
     time, (ii) UCC financing statements sufficient to protect the Borrower's
     and the Lender's interests in such goods, and (iii) UCC searches showing
     that no other secured party has filed a financing statement covering such
     Person's property other than the Borrower, or if there exists any such
     secured party, evidence that each such secured party has received notice
     from the Borrower and the Lender sufficient to protect the Borrower's and
     the Lender's interests in the Borrower's goods from any claim by such
     secured party, if any.

          (i) The Wholesale Lockbox and Collection Account Agreement.

          (j) The Collection Account Agreement.

          (k) Control agreements with each bank at which the Borrower maintains
     deposit accounts.

          (l) The Subordination Agreement.

          (m) Current searches of appropriate filing offices showing that (i) no
     Liens have been filed and remain in effect against the Borrower except
     Permitted Liens or Liens held by Persons who have agreed in writing that
     upon receipt of proceeds of the initial Revolving Advances, they will
     satisfy, release or terminate such Liens in a manner satisfactory to the
     Lender, and (ii) the Lender has duly filed all financing statements
     necessary to perfect the Security Interest, to the extent the Security
     Interest is capable of being perfected by filing.

                                      -22-
<PAGE>

          (n) A certificate of the Borrower's Secretary or Assistant Secretary
     certifying that attached to such certificate are (i) the resolutions of the
     Borrower's Directors and, if required, Owners, authorizing the execution,
     delivery and performance of the Loan Documents, (ii) true, correct and
     complete copies of the Borrower's Constituent Documents, and (iii) examples
     of the signatures of the Borrower's Officers or agents authorized to
     execute and deliver the Loan Documents and other instruments, agreements
     and certificates, including Revolving Advance requests, on the Borrower's
     behalf.

          (o) A current certificate issued by the Secretary of State of New
     Mexico certifying that Tradestar is in compliance with all applicable
     organizational requirements of the State of New Mexico.

          (p) A current certificate issued by the Secretary of State of
     Louisiana certifying that Petroleum Engineers is in compliance with all
     applicable organizational requirements of the State of Louisiana.

          (q) Evidence that the Borrower is duly licensed or qualified to
     transact business in all jurisdictions where the character of the property
     owned or leased or the nature of the business transacted by it makes such
     licensing or qualification necessary, except where the failure to obtain
     such license or qualification is not reasonably expected to cause a
     Material Adverse Effect.

          (r) A certificate of an Officer of the Borrower confirming, in his
     capacity as an officer of the Borrower, the representations and warranties
     set forth in Article V.

          (s) An opinion of counsel to the Borrower, addressed to the Lender.

          (t) Certificates of the insurance required hereunder, with all hazard
     insurance containing a lender's loss payable endorsement in the Lender's
     favor and with all liability insurance naming the Lender as an additional
     insured.

          (u) The separate Guaranty of each Guarantor, pursuant to which each
     Guarantor unconditionally guarantees the full and prompt payment of all
     Obligations.

          (v) A waiver of interest issued by the spouse of each individual
     Guarantor, waiving any and all interest he or she may have in the assets
     disclosed to the Lender in the financial statements of that Guarantor and
     in any future earnings or assets acquired by that Guarantor.

          (w) An opinion of counsel to each Guarantor, addressed to the Lender.

          (x) Payment of the fees and commissions due under Section 2.6 through
     the date of the initial Revolving Advance or Letter of Credit and expenses
     incurred by the Lender through such date and required to be paid by the
     Borrower under Section 8.5, including all legal expenses incurred through
     the date of this Agreement.

          (y) Evidence that after making the initial Revolving Advance,
     satisfying all obligations owed to the existing lenders of Tradestar,
     satisfying all trade payables older than 60 days from invoice date, book
     overdrafts and closing costs, Availability shall be not less than $750,000,

                                      -23-
<PAGE>

     Tradestar Availability shall be not less than $375,000, and Petroleum
     Engineers Availability shall be not less than $375,000.

          (z) A Customer Identification Information form and such other forms
     and verification as the Lender may need to comply with the U.S.A. Patriot
     Act.

          (aa) A true and correct copy of the Agreement and Plan of Merger dated
     May 23, 2006, among Tradestar Services, Inc., Tradestar Acquisition Sub,
     Inc., the CYMRI Corporation, and the individual shareholders named therein.

          (bb) Evidence of a $2,250,000 cash infusion into Tradestar Services,
     Inc. and a $656,226.31 cash infusion into Tradestar.

          (cc) A true and correct copy of the documentation evidencing the
     Corporate legal structure of the Borrower, the Guarantors and all
     Affiliates of any of them.

          (dd) A true and correct copy of the documentation evidencing the debt
     owed by Tradestar Services, Inc. to the creditors listed on Schedule 6.2.

          (ee) Evidence of the merger of Petroleum Engineers International, Inc.
     with and into Petroleum Engineers, Inc.

          (ff) Such other documents as the Lender in its sole discretion may
     require.

     Section 4.2 Conditions Precedent to All Revolving Advances and Letters of
Credit. The Lender's obligation to make each Revolving Advance or to cause the
issuance of a Letter of Credit shall be subject to the further conditions
precedent that:

          (a) the representations and warranties contained in Article V are
     correct on and as of the date of such Revolving Advance or issuance of a
     Letter of Credit as though made on and as of such date, except to the
     extent that such representations and warranties relate solely to an earlier
     date; and

          (b) no event has occurred and is continuing, or would result from such
     Revolving Advance or issuance of a Letter of Credit which constitutes a
     Default or an Event of Default.

                                    ARTICLE V

                         REPRESENTATIONS AND WARRANTIES
                         ------------------------------

     The Borrower represents and warrants to the Lender as follows:

     Section 5.1 Existence and Power; Name; Chief Executive Office; Inventory
and Equipment Locations; Federal Employer Identification Number and
Organizational Identification Number. Tradestar is a corporation duly organized,
validly existing and in good standing under the laws of the State of New Mexico
and is duly licensed or qualified to transact business in all jurisdictions
where the character of the property owned or leased or the nature of the
business transacted by it makes such licensing or qualification necessary.

                                      -24-
<PAGE>

Petroleum Engineers is a corporation duly organized, validly existing and in
good standing under the laws of the State of Louisiana and is duly licensed or
qualified to transact business in all jurisdictions where the character of the
property owned or leased or the nature of the business transacted by it makes
such licensing or qualification necessary. The Borrower has all requisite power
and authority to conduct its business, to own its properties and to execute and
deliver, and to perform all of its obligations under, the Loan Documents. During
its existence, the Borrower has done business solely under the names set forth
in Schedule 5.1. The Borrower's chief executive office and principal place of
business is located at the address set forth in Schedule 5.1, and all of the
Borrower's records relating to its business or the Collateral are kept at that
location. All Inventory and Equipment is located at that location or at one of
the other locations listed in Schedule 5.1. The Borrower's federal employer
identification number and organization identification number are correctly set
forth in Section 3.6.

     Section 5.2 Capitalization. Schedule 5.2 constitutes a correct and complete
list of all ownership interests of the Borrower and rights to acquire ownership
interests including the record holder, number of interests and percentage
interests on a fully diluted basis, and an organizational chart showing the
ownership structure of all Subsidiaries of the Borrower.

     Section 5.3 Authorization of Borrowing; No Conflict as to Law or
Agreements. The execution, delivery and performance by the Borrower of the Loan
Documents and the borrowings from time to time hereunder have been duly
authorized by all necessary corporate action and do not and will not (i) require
any consent or approval of the Borrower's Owners; (ii) require any
authorization, consent or approval by, or registration, declaration or filing
with, or notice to, any governmental department, commission, board, bureau,
agency or instrumentality, domestic or foreign, or any third party, except such
authorization, consent, approval, registration, declaration, filing or notice as
has been obtained, accomplished or given prior to the date hereof; (iii) violate
any provision of any law, rule or regulation (including Regulation X of the
Board of Governors of the Federal Reserve System) or of any order, writ,
injunction or decree presently in effect having applicability to the Borrower or
of the Borrower's Constituent Documents; (iv) result in a breach of or
constitute a default under any indenture or loan or credit agreement or any
other material agreement, lease or instrument to which the Borrower is a party
or by which it or its properties may be bound or affected; or (v) result in, or
require, the creation or imposition of any Lien (other than the Security
Interest) upon or with respect to any of the properties now owned or hereafter
acquired by the Borrower.

     Section 5.4 Legal Agreements. This Agreement constitutes and, upon due
execution by the Borrower, the other Loan Documents will constitute the legal,
valid and binding obligations of the Borrower, enforceable against the Borrower
in accordance with their respective terms.

     Section 5.5 Subsidiaries. Except as set forth in Schedule 5.5 hereto, the
Borrower has no Subsidiaries.

     Section 5.6 Financial Condition; No Adverse Change. Tradestar has furnished
to the Lender its audited financial statements for its fiscal year ended
December 31, 2005 and unaudited financial statements for the fiscal-year-to-date
period ended March 31, 2006, and those statements fairly present Tradestar's
financial condition on the dates thereof and the results of its operations and

                                      -25-
<PAGE>

cash flows for the periods then ended and were prepared in accordance with GAAP.
Petroleum Engineer has furnished to the Lender its audited financial statements
for its fiscal year ended December 31, 2004 and unaudited financial statements
for the fiscal-year-to-date period ended March 31, 2006, and those statements
fairly present Petroleum Engineers's financial condition on the dates thereof
and the results of its operations and cash flows for the periods then ended and
were prepared in accordance with GAAP. Since the date of the most recent
financial statements, there has been no change in the Borrower's business,
properties or condition (financial or otherwise) which has had a Material
Adverse Effect.

     Section 5.7 Litigation. Except as set forth in Schedule 5.7, Borrower has
not been served in any actions, suits or proceedings pending nor, to the
Borrower's knowledge, threatened against or affecting the Borrower or any of its
Affiliates or the properties of the Borrower or any of its Affiliates before any
court or governmental department, commission, board, bureau, agency or
instrumentality, domestic or foreign, which, if determined adversely to the
Borrower or any of its Affiliates, would have a Material Adverse Effect on the
financial condition, properties or operations of the Borrower or any of its
Affiliates.

     Section 5.8 Regulation U. The Borrower is not engaged in the business of
extending credit for the purpose of purchasing or carrying margin stock (within
the meaning of Regulation U of the Board of Governors of the Federal Reserve
System), and no part of the proceeds of any Revolving Advance will be used to
purchase or carry any margin stock or to extend credit to others for the purpose
of purchasing or carrying any margin stock.

     Section 5.9 Taxes. The Borrower and its Affiliates have paid or caused to
be paid to the proper authorities when due all federal, state and local taxes
required to be withheld by each of them. The Borrower and its Affiliates have
filed all federal, state and local tax returns which to the knowledge of the
Officers of the Borrower or any Affiliate, as the case may be, are required to
be filed, and the Borrower and its Affiliates have paid or caused to be paid to
the respective taxing authorities all taxes as shown on said returns or on any
assessment received by any of them to the extent such taxes have become due.

     Section 5.10 Titles and Liens. The Borrower has good and defensible title
to all Collateral free and clear of all Liens other than Permitted Liens. No
financing statement naming the Borrower as debtor is on file in any office
except to perfect only Permitted Liens.

     Section 5.11 Intellectual Property Rights.

          (a) Owned Intellectual Property. Schedule 5.11 is a complete list of
     all patents, applications for patents, trademarks, applications to register
     trademarks, service marks, applications to register service marks, mask
     works, trade dress and copyrights for which the Borrower is the owner of
     record (the "Owned Intellectual Property"). Except as disclosed on Schedule
     5.11, (i) the Borrower owns the Owned Intellectual Property free and clear
     of all restrictions (including covenants not to sue a third party), court
     orders, injunctions, decrees, writs or Liens, whether by written agreement
     or otherwise, (ii) no Person other than the Borrower owns or has been
     granted any right in the Owned Intellectual Property, (iii) all Owned
     Intellectual Property is valid, subsisting and enforceable and (iv) the
     Borrower has taken all commercially reasonable action necessary to maintain
     and protect the Owned Intellectual Property.

                                      -26-
<PAGE>

          (b) Agreements with Employees and Contractors. The Borrower has
     entered into a legally enforceable agreement with each of its employees and
     subcontractors obligating each such Person to assign to the Borrower,
     without any additional compensation, any Intellectual Property Rights
     created, discovered or invented by such Person in the course of such
     Person's employment or engagement with the Borrower (except to the extent
     prohibited by law), and further requiring such Person to cooperate with the
     Borrower, without any additional compensation, in connection with securing
     and enforcing any Intellectual Property Rights therein; provided, however,
     that the foregoing shall not apply with respect to employees and
     subcontractors whose job descriptions are of the type such that no such
     assignments are reasonably foreseeable.

          (c) Intellectual Property Rights Licensed from Others. Schedule 5.11
     is a complete list of all agreements under which the Borrower has licensed
     Intellectual Property Rights from another Person ("Licensed Intellectual
     Property") other than readily available, non-negotiated licenses of
     computer software and other intellectual property used solely for
     performing accounting, word processing and similar administrative tasks
     ("Off-the-shelf Software") and a summary of any ongoing payments the
     Borrower is obligated to make with respect thereto. Except as disclosed on
     Schedule 5.11 and in written agreements, copies of which have been given to
     the Lender, the Borrower's licenses to use the Licensed Intellectual
     Property are free and clear of all restrictions, Liens, court orders,
     injunctions, decrees, or writs, whether by written agreement or otherwise.
     Except as disclosed on Schedule 5.11, the Borrower is not obligated or
     under any liability whatsoever to make any payments of a material nature by
     way of royalties, fees or otherwise to any owner of, licensor of, or other
     claimant to, any Intellectual Property Rights.

          (d) Other Intellectual Property Needed for Business. Except for
     Off-the-shelf Software and as disclosed on Schedule 5.11, the Owned
     Intellectual Property and the Licensed Intellectual Property constitute all
     Intellectual Property Rights used or necessary to conduct the Borrower's
     business as it is presently conducted or as the Borrower reasonably
     foresees conducting it.

          (e) Infringement. Except as disclosed on Schedule 5.11, the Borrower
     has no knowledge of, and has not received any written claim or notice
     alleging, any Infringement of another Person's Intellectual Property Rights
     (including any written claim that the Borrower must license or refrain from
     using the Intellectual Property Rights of any third party) nor, to the
     Borrower's knowledge, is there any threatened claim or any reasonable basis
     for any such claim.

     Section 5.12 Plans. Except as disclosed to the Lender in writing prior to
the date hereof, neither the Borrower nor any ERISA Affiliate (i) maintains or
has maintained any Pension Plan, (ii) contributes or has contributed to any
Multiemployer Plan or (iii) provides or has provided post-retirement medical or
insurance benefits with respect to employees or former employees (other than
benefits required under Section 601 of ERISA, Section 4980B of the IRC or
applicable state law). Neither the Borrower nor any ERISA Affiliate has received
any notice or has any knowledge to the effect that it is not in full compliance

                                      -27-
<PAGE>

with any of the requirements of ERISA, the IRC or applicable state law with
respect to any Plan. No Reportable Event exists in connection with any Pension
Plan. Each Plan which is intended to qualify under the IRC is so qualified, and
no fact or circumstance exists which may have an adverse effect on the Plan's
tax-qualified status. Neither the Borrower nor any ERISA Affiliate has (i) any
accumulated funding deficiency (as defined in Section 302 of ERISA and Section
412 of the IRC) under any Plan, whether or not waived, (ii) any liability under
Section 4201 or 4243 of ERISA for any withdrawal, partial withdrawal,
reorganization or other event under any Multiemployer Plan or (iii) any
liability or knowledge of any facts or circumstances which could result in any
liability to the Pension Benefit Guaranty Corporation, the Internal Revenue
Service, the Department of Labor or any participant in connection with any Plan
(other than routine claims for benefits under the Plan).

     Section 5.13 Default. The Borrower is in compliance with all provisions of
all agreements, instruments, decrees and orders to which it is a party or by
which it or its property is bound or affected, the breach or default of which
would reasonably be expected to cause a Material Adverse Effect on the
Borrower's financial condition, properties or operations.

     Section 5.14 Environmental Matters.

          (a) Except as disclosed on Schedule 5.14, there are not present in, on
     or under the Premises any Hazardous Substances in such form or quantity as
     to create any material liability or obligation for either the Borrower or
     the Lender under the common law of any jurisdiction or under any
     Environmental Law, and no Hazardous Substances have ever been stored,
     buried, spilled, leaked, discharged, emitted or released in, on or under
     the Premises in such a way as to create any such material liability.

          (b) Except as disclosed on Schedule 5.14, the Borrower has not
     disposed of Hazardous Substances in such a manner as to create any material
     liability under any Environmental Law.

          (c) Except as disclosed on Schedule 5.14, there have not existed in
     the past, nor are there any threatened or impending requests, claims,
     notices, investigations, demands, administrative proceedings, hearings or
     litigation relating in any way to the Premises or the Borrower, alleging
     material liability under, violation of, or noncompliance with any
     Environmental Law or any license, permit or other authorization issued
     pursuant thereto.

          (d) Except as disclosed on Schedule 5.14, the Borrower's businesses
     are and have in the past always been conducted in accordance with all
     Environmental Laws and all licenses, permits and other authorizations
     required pursuant to any Environmental Law and necessary for the lawful and
     efficient operation of such businesses are in the Borrower's possession and
     are in full force and effect, nor has the Borrower been denied insurance on
     grounds related to potential environmental liability. No permit required
     under any Environmental Law is scheduled to expire within 12 months and
     there is no threat that any such permit will be withdrawn, terminated,
     limited or materially changed.

          (e) Except as disclosed on Schedule 5.14, to Borrower's knowledge the
     Premises are not and never have been listed on the National Priorities
     List, the Comprehensive Environmental Response, Compensation and Liability

                                      -28-
<PAGE>

     Information System or any similar federal, state or local list, schedule,
     log, inventory or database.

          (f) The Borrower has delivered to the Lender all environmental
     assessments, audits, reports, permits, licenses and other documents in its
     possession or control describing or relating in any way to the Premises or
     the Borrower's businesses.

     Section 5.15 Submissions to the Lender. All financial and other information
provided to the Lender by or on behalf of the Borrower in connection with the
Borrower's request for the credit facilities contemplated hereby (i) is true and
correct in all material respects, (ii) does not omit any material fact necessary
to make such information not misleading and, (iii) as to projections, valuations
or proforma financial statements, presents a good faith opinion as to such
projections, valuations and proforma condition and results.

     Section 5.16 Financing Statements. The Borrower has authorized the filing
of financing statements sufficient when filed to perfect the Security Interest
and the other security interests created by the Security Documents. When such
financing statements are filed in the offices noted therein, the Lender will
have a valid and perfected security interest in all Collateral which is capable
of being perfected by filing financing statements. None of the Collateral is or
will become a fixture on real estate, unless a sufficient fixture filing is in
effect with respect thereto.

     Section 5.17 Rights to Payment. Each right to payment and each instrument,
document, chattel paper and other agreement constituting or evidencing
Collateral is (or, in the case of all future Collateral, will be when arising or
issued) the valid, genuine and legally enforceable obligation, subject to no
defense, setoff or counterclaim, of the account debtor or other obligor named
therein or in the Borrower's records pertaining thereto as being obligated to
pay such obligation.

     Section 5.18 Financial Solvency. Both before and after giving effect to the
recapitalization, reorganization, merger and acquisition, and all of the
transactions contemplated in the Loan Documents and the Agreement and Plan of
Merger dated May 23, 2006, among Tradestar Services, Inc., Tradestar Acquisition
Sub, Inc., the CYMRI Corporation, and the individual shareholders named therein,
none of the Borrower or its Affiliates:

          (a) Was or will be insolvent, as that term is used and defined in
     Section 101(32) of the United States Bankruptcy Code and Section 2 of the
     Uniform Fraudulent Transfer Act;

          (b) Has unreasonably small capital or is engaged or about to engage in
     a business or a transaction for which any remaining assets of the Borrower
     or such Affiliate are unreasonably small;

          (c) By executing, delivering or performing its obligations under the
     Loan Documents or other documents to which it is a party or by taking any
     action with respect thereto, intends to, nor believes that it will, incur
     debts beyond its ability to pay them as they mature;

                                      -29-
<PAGE>

          (d) By executing, delivering or performing its obligations under the
     Loan Documents or other documents to which it is a party or by taking any
     action with respect thereto, intends to hinder, delay or defraud either its
     present or future creditors; and

          (e) At this time contemplates filing a petition in bankruptcy or for
     an arrangement or reorganization or similar proceeding under any law of any
     jurisdiction, nor, to the best knowledge of the Borrower, is the subject of
     any actual, pending or threatened bankruptcy, insolvency or similar
     proceedings under any law of any jurisdiction.

                                   ARTICLE VI

                                    COVENANTS
                                    ---------

     So long as the Obligations shall remain unpaid, or the Credit Facility
shall remain outstanding, the Borrower will comply with the following
requirements, unless the Lender shall otherwise consent in writing:

     Section 6.1 Reporting Requirements. The Borrower will deliver, or cause to
be delivered, to the Lender each of the following, which shall be in form and
detail acceptable to the Lender:

          (a) Annual Financial Statements. As soon as available, and in any
     event within 120 days after the end of each fiscal year of the Borrower,
     the Borrower's audited financial statements with the unqualified opinion of
     independent certified public accountants selected by the Borrower and
     acceptable to the Lender, which annual financial statements shall include
     the Borrower's balance sheet as at the end of such fiscal year and the
     related statements of the Borrower's income, retained earnings and cash
     flows for the fiscal year then ended, prepared, if the Lender so requests,
     on a consolidating and consolidated basis to include any Affiliates, all in
     reasonable detail and prepared in accordance with GAAP, together with (i)
     copies of all management letters prepared by such accountants; (ii) a
     report signed by such accountants stating that in making the investigations
     necessary for said opinion they obtained no knowledge, except as
     specifically stated, of any Default or Event of Default and all relevant
     facts in reasonable detail to evidence, and the computations as to, whether
     or not the Borrower is in compliance with the Financial Covenants; and
     (iii) a certificate of the Borrower's chief financial officer stating that
     such financial statements have been prepared in accordance with GAAP,
     fairly represent the Borrower's financial position and the results of its
     operations, and whether or not such Officer has knowledge of the occurrence
     of any Default or Event of Default and, if so, stating in reasonable detail
     the facts with respect thereto.

          (b) Monthly Financial Statements. As soon as available and in any
     event within 30 days after the end of each month, the unaudited/internal
     balance sheet and statements of income and retained earnings of the
     Borrower as at the end of and for such month and for the year to date
     period then ended, prepared, if the Lender so requests, on a consolidating
     and consolidated basis to include any Affiliates, in reasonable detail and
     stating in comparative form the figures for the corresponding date and
     periods in the previous year, all prepared in accordance with GAAP, subject
     to year-end audit adjustments and which fairly represent the Borrower's
     financial position and the results of its operations; and accompanied by a
     certificate of the Borrower's chief financial officer, substantially in the

                                      -30-
<PAGE>

     form of Exhibit B-1 or B-2 hereto stating (i) that such financial
     statements have been prepared in accordance with GAAP, subject to year-end
     audit adjustments, and fairly represent the Borrower's financial position
     and the results of its operations, (ii) whether or not such Officer has
     knowledge of the occurrence of any Default or Event of Default not
     theretofore reported and remedied and, if so, stating in reasonable detail
     the facts with respect thereto, and (iii) all relevant facts in reasonable
     detail to evidence, and the computations as to, whether or not the Borrower
     is in compliance with the Financial Covenants.

          (c) Collateral Reports. Within 20 days after the end of each month or
     more frequently if the Lender so requires, the Borrower's accounts
     receivable and its accounts payable, and a calculation of the Borrower's
     Accounts and Eligible Accounts as at the end of such month or shorter time
     period.

          (d) Projections. No later than 60 days before the last day of each
     fiscal year, the Borrower's projected balance sheets, income statements,
     statements of cash flow and projected Availability for each month of the
     succeeding fiscal year, each in reasonable detail. Such items will be
     certified by the Officer who is the Borrower's chief financial officer as
     being the most accurate projections available and identical to the
     projections used by the Borrower for internal planning purposes and be
     delivered with a statement of underlying assumptions and such supporting
     schedules and information as the Lender may in its discretion require.

          (e) Supplemental Reports. Bi-Weekly (for Petroleum Engineers), Weekly
     (for Tradestar), or more frequently if the Lender so requires, the
     Borrower's "daily collateral reports", sales, receivables schedules, credit
     memos, collection reports and an accounts receivable reconciliation report.

          (f) Litigation. Immediately after the commencement thereof, notice in
     writing of all litigation and of all proceedings before any governmental or
     regulatory agency affecting the Borrower (i) of the type described in
     Section 5.14(c) or (ii) which seek a monetary recovery against the Borrower
     in excess of $50,000.

          (g) Defaults. When any Officer of the Borrower becomes aware of the
     probable occurrence of any Default or Event of Default, and no later than 5
     days after such Officer becomes aware of such Default or Event of Default,
     notice of such occurrence, together with a detailed statement by a
     responsible Officer of the Borrower of the steps being taken by the
     Borrower to cure the effect thereof.

          (h) Plans. As soon as possible, and in any event within 30 days after
     the Borrower knows or has reason to know that any Reportable Event with
     respect to any Pension Plan has occurred, a statement signed by the Officer
     who is the Borrower's chief financial officer setting forth details as to
     such Reportable Event and the action which the Borrower proposes to take
     with respect thereto, together with a copy of the notice of such Reportable
     Event to the Pension Benefit Guaranty Corporation. As soon as possible, and
     in any event within 10 days after the Borrower fails to make any quarterly
     contribution required with respect to any Pension Plan under Section 412(m)
     of the IRC, the Borrower will deliver to the Lender a statement signed by

                                      -31-
<PAGE>

     the Officer who is the Borrower's chief financial officer setting forth
     details as to such failure and the action which the Borrower proposes to
     take with respect thereto, together with a copy of any notice of such
     failure required to be provided to the Pension Benefit Guaranty
     Corporation. As soon as possible, and in any event within ten days after
     the Borrower knows or has reason to know that it has or is reasonably
     expected to have any liability under Sections 4201 or 4243 of ERISA for any
     withdrawal, partial withdrawal, reorganization or other event under any
     Multiemployer Plan, the Borrower will deliver to the Lender a statement of
     the Borrower's chief financial officer setting forth details as to such
     liability and the action which the Borrower proposes to take with respect
     thereto.

          (i) Disputes. Promptly upon knowledge thereof, notice of (i) any
     disputes or claims by the Borrower's customers exceeding $25,000
     individually or $50,000 in the aggregate during any fiscal year; (ii)
     credit memos; and (iii) any goods returned to or recovered by the Borrower.

          (j) Officers and Directors. Promptly upon knowledge thereof, notice of
     any change in the persons constituting the Borrower's Officers and
     Directors.

          (k) Collateral. Promptly upon knowledge thereof, notice of any loss of
     or material damage to any Collateral or of any substantial adverse change
     in any Collateral or the prospect of payment thereof.

          (l) Commercial Tort Claims. Promptly upon knowledge thereof, notice of
     any commercial tort claims it may bring against any Person, including the
     name and address of each defendant, a summary of the facts, an estimate of
     the Borrower's damages, copies of any complaint or demand letter submitted
     by the Borrower, and such other information as the Lender may request.

          (m) Intellectual Property.

               (i) 30 days prior written notice of Borrower's intent to acquire
          material Intellectual Property Rights; except for transfers permitted
          under Section 6.17, the Borrower will give the Lender 30 days prior
          written notice of its intent to dispose of material Intellectual
          Property Rights and upon request shall provide the Lender with copies
          of all proposed documents and agreements concerning such rights.

               (ii) Promptly upon knowledge thereof, notice of (A) any
          Infringement of its Intellectual Property Rights by others, (B) claims
          that the Borrower is Infringing another Person's Intellectual Property
          Rights and (C) any threatened cancellation, termination or material
          limitation of its Intellectual Property Rights.

               (iii) Promptly upon receipt, copies of all registrations and
          filings with respect to its Intellectual Property Rights.

          (n) Reports to Owners. Promptly upon their distribution, copies of all
     financial statements, reports and proxy statements which the Borrower shall
     have sent to its Owners.

          (o) SEC Filings. Promptly after the sending or filing thereof, copies
     of all regular and periodic reports which the Borrower shall file with the
     Securities and Exchange Commission or any national securities exchange.

                                      -32-
<PAGE>

          (p) Violations of Law. Promptly upon knowledge thereof, notice of the
     Borrower's violation of any law, rule or regulation, the non-compliance
     with would reasonably be expected to have a Material Adverse Effect on the
     Borrower.

          (q) Other Reports. From time to time, with reasonable promptness, any
     and all receivables schedules, collection reports, deposit records, copies
     of invoices to account debtors, and such other material, reports, records
     or information as the Lender may request.

     Section 6.2 Financial Covenants.

          (a) Minimum Book Net Worth. Tradestar will maintain, during each
     period described below, its Book Net Worth (calculated without regard to
     (i) any change in the valuation of goodwill made in accordance with FASB
     Accounting Standard 142, and (ii) any non-cash effects of accounting for
     stock based compensation in accordance with FASB pronouncement SFAS
     123(r)), determined as of the end of each month, in an amount not less than
     the amount set forth for each such period:

                                                        Minimum Book
                            Period                        Net Worth
         -------------------------------------------    ------------
                         May 31, 2006                     $250,000
                        June 30, 2006                     $285,000
                        July 31, 2006                     $285,000
                       August 31, 2006                    $285,000
                      September 30, 2006                  $489,000
                       October 31, 2006                   $500,000
                      November 30, 2006                   $550,000
         December 31, 2006 and each month thereafter      $628,000

          (b) Minimum Net Income. Tradestar will achieve, for each period
     described below, Net Income (calculated without regard to (i) any change in
     the valuation of goodwill made in accordance with FASB Accounting Standard
     142, and (ii) any non-cash effects of accounting for stock based
     compensation in accordance with FASB pronouncement SFAS 123(r)) of not less
     than the amount set forth for each such period:

                     Period                          Minimum Net Income
     ---------------------------------------         ------------------
         Six months ending June 30, 2006                  $130,000
      Nine months ending September 30, 2006               $334,000
     Twelve months ending December 31, 2006               $473,000

                                      -33-
<PAGE>

          (c) Minimum Book Net Worth. Petroleum Engineers will maintain, during
     each period described below, its Book Net Worth (calculated without regard
     to (i) any change in the valuation of goodwill made in accordance with FASB
     Accounting Standard 142, and (ii) any non-cash effects of accounting for
     stock based compensation in accordance with FASB pronouncement SFAS
     123(r)), determined as of the end of each month, in an amount not less than
     the amount set forth for each such period:

                                                        Minimum Book
                            Period                        Net Worth
         -------------------------------------------    ------------

                         May 31, 2006                    $1,000,000
                        June 30, 2006                    $1,076,000
                        July 31, 2006                    $1,076,000
                       August 31, 2006                   $1,076,000
                      September 30, 2006                 $1,321,000
                       October 31, 2006                  $1,321,000
                      November 30, 2006                  $1,321,000
         December 31, 2006 and each month thereafter     $1,587,000

          (d) Minimum Net Income. Petroleum Engineers will achieve, for each
     period described below, Net Income (calculated without regard to (i) any
     change in the valuation of goodwill made in accordance with FASB Accounting
     Standard 142, and (ii) any non-cash effects of accounting for stock based
     compensation in accordance with FASB pronouncement SFAS 123(r)) of not less
     than the amount set forth for each such period:

                     Period                          Minimum Net Income
     ---------------------------------------         ------------------
         Six months ending June 30, 2006                  $160,000
      Nine months ending September 30, 2006               $405,000
     Twelve months ending December 31, 2006               $671,000

          (e) Capital Expenditures. Tradestar will not incur or contract to
     incur Capital Expenditures of more than $50,000 in the aggregate during the
     fiscal year ended December 31, 2006, and zero during any fiscal year
     thereafter.

          (f) Capital Expenditures. Petroleum Engineers will not incur or
     contract to incur Capital Expenditures of more than $175,000 in the
     aggregate during the fiscal year ended December 31, 2006, and zero during
     any fiscal year thereafter.

          (g) Distributions from Tradestar to Tradestar Services, Inc. Tradestar
     will not pay any dividends or distributions to Tradestar Services, Inc.
     other than distributions to allow Tradestar Services, Inc. to make
     scheduled principal and interest payments on debt owed by Tradestar
     Services, Inc. to the creditors listed on Schedule 6.2, which distributions
     shall not exceed $100,000 in any month, or $700,000 in the aggregate during

                                      -34-
<PAGE>

     Tradestar's fiscal year ending December 31, 2006, and shall be zero during
     any fiscal year thereafter. Before Tradestar makes any distribution to
     Tradestar Services, Inc. otherwise permitted under this Section 6.2(g), and
     immediately after making any such payment, (i) Tradestar Availability shall
     not be less than $375,000, (ii) Tradestar shall have positive Book Net
     Worth and (iii) no Default Period is then in existence and none would exist
     immediately after such distribution. The debt owed by Tradestar Services,
     Inc. is not, and will not, be guaranteed by Tradestar.

          (h) Distributions from Petroleum Engineers to Tradestar Services, Inc.
     Petroleum Engineers will not pay any dividends or distributions to
     Tradestar Services, Inc. other than (i) distributions to allow Tradestar
     Services, Inc. to make scheduled principal and interest payments on debt
     owed by Tradestar Services, Inc. to the creditors listed on Schedule 6.2,
     which distributions shall not exceed $150,000 in any month, or $1,050,000
     in the aggregate during Petroleum Engineers's fiscal year ending December
     31, 2006, and shall be zero during any fiscal year thereafter or (ii)
     distributions to allow Tradestar Services, Inc. to make loans or advances
     on a subordinated basis to Tradestar, which distributions shall not exceed
     $100,000 in any month, or $700,000 in the aggregate during Petroleum
     Engineers's fiscal year ending December 31, 2006, and shall be zero during
     any fiscal year thereafter. Before Petroleum Engineers makes any
     distribution to Tradestar Services, Inc. otherwise permitted under this
     Section 6.2(h), and immediately after making any such payment (i) Petroleum
     Engineers Availability shall not be less than $500,000, (ii) Petroleum
     Engineers shall have positive Book Net Worth and (iii) no Default Period is
     then in existence and none would exist immediately after such distribution.
     The debt owed by Tradestar Services, Inc. is not, and will not, be
     guaranteed by Petroleum Engineers.

          (i) New Covenants. The Borrower and the Lender shall agree on new
     covenant levels for this Section 6.2 prior to the expiration of the
     covenant levels then in effect, but if the Borrower and the Lender do not
     agree, no later than 31 days prior to the expiration thereof, the Lender
     shall designate the required amounts in its sole discretion based on (i)
     the Borrower's reasonable projections for such periods and/or (ii) the
     Borrower's historical financial performance, and the failure by the
     Borrower to maintain the designated amounts shall constitute an Event of
     Default.

     Section 6.3 Permitted Liens; Financing Statements.

          (a) The Borrower will not create, incur or suffer to exist any Lien
     upon or of any of its assets, now owned or hereafter acquired, to secure
     any indebtedness; excluding, however, from the operation of the foregoing,
     the following (each a "Permitted Lien"; collectively, "Permitted Liens"):

               (i) In the case of any of the Borrower's real property,
          covenants, restrictions, rights, easements and minor irregularities in
          title which do not materially interfere with the Borrower's business
          or operations as presently conducted;

               (ii) Liens in existence on the date hereof and listed in Schedule
          6.3 hereto, securing indebtedness for borrowed money permitted under
          Section 6.4;

               (iii) The Security Interest and Liens created by the Security
          Documents; and

               (iv) Purchase money Liens relating to the acquisition of
          machinery and equipment of the Borrower not exceeding the lesser of

                                      -35-
<PAGE>

          cost or fair market value thereof, and so long as no Default Period is
          then in existence and none would exist immediately after such
          acquisition.

          (b) The Borrower will not amend any financing statements in favor of
     the Lender except as permitted by law. Any authorization by the Lender to
     any Person to amend financing statements in favor of the Lender shall be in
     writing.

     Section 6.4 Indebtedness. The Borrower will not incur, create, assume or
permit to exist any indebtedness or liability on account of deposits or advances
or any indebtedness for borrowed money or letters of credit issued on the
Borrower's behalf, or any other indebtedness or liability evidenced by notes,
bonds, debentures or similar obligations, except:

          (a) Indebtedness arising hereunder;

          (b) Indebtedness of the Borrower in existence on the date hereof and
     listed in Schedule 6.4 hereto; and

          (c) Indebtedness relating to Permitted Liens.

     Section 6.5 Guaranties. The Borrower will not assume, guarantee, endorse or
otherwise become directly or contingently liable in connection with any
obligations of any other Person, except:

          (a) The endorsement of negotiable instruments by the Borrower for
     deposit or collection or similar transactions in the ordinary course of
     business; and

          (b) Guaranties, endorsements and other direct or contingent
     liabilities in connection with the obligations of other Persons, in
     existence on the date hereof and listed in Schedule 6.5 hereto.

     Section 6.6 Investments and Subsidiaries. The Borrower will not make or
permit to exist any loans or advances to, or make any investment or acquire any
interest whatsoever in, any other Person or Affiliate, including any partnership
or joint venture, nor purchase or hold beneficially any stock or other
securities or evidence of indebtedness of any other Person or Affiliate, except:

          (a) Investments in direct obligations of the United States of America
     or any agency or instrumentality thereof whose obligations constitute full
     faith and credit obligations of the United States of America having a
     maturity of one year or less, commercial paper issued by U.S. corporations
     rated "A-1" or "A-2" by Standard & Poor's Ratings Services or "P-1" or
     "P-2" by Moody's Investors Service or certificates of deposit or bankers'
     acceptances having a maturity of one year or less issued by members of the
     Federal Reserve System having deposits in excess of $100,000,000 (which
     certificates of deposit or bankers' acceptances are fully insured by the
     Federal Deposit Insurance Corporation);

          (b) Travel advances or loans to the Borrower's Officers and employees
     not exceeding at any one time an aggregate of $10,000;

          (c) Prepaid rent not exceeding one month or security deposits; and

                                      -36-
<PAGE>

          (d) Current investments in the Subsidiaries in existence on the date
     hereof and listed in Schedule 5.5 hereto.

     Section 6.7 Dividends and Distributions. Except as set forth in Section
6.2(g) and Section 6.2(h), the Borrower will not declare or pay any dividends
(other than dividends payable solely in stock of the Borrower) on any class of
its stock, or make any payment on account of the purchase, redemption or other
retirement of any shares of such stock, or other securities or evidence of its
indebtedness or make any distribution in respect thereof, either directly or
indirectly.

     Section 6.8 Salaries. The Borrower will not pay excessive or unreasonable
salaries, bonuses, commissions, consultant fees or other compensation; or
increase the salary, bonus, commissions, consultant fees or other compensation
of any Director, Officer or consultant, or any member of their families, either
individually or for all such persons in the aggregate, by more than the amount
deemed reasonable by the compensation committee of the Borrower, or pay any such
increase from any source other than profits earned in the year of payment.
Notwithstanding the above, the Borrower will not increase the salary, bonus,
commissions, consultant fees or other compensation of any Director, Officer or
consultant, or any member of their families, either individually or for all such
persons in the aggregate, if such payment would result in a Default or an Event
of Default.

     Section 6.9 Books and Records; Collateral Examination, Inspection and
Appraisals.

          (a) The Borrower will keep accurate books of record and account for
     itself pertaining to the Collateral and pertaining to the Borrower's
     business and financial condition and such other matters as the Lender may
     from time to time request in which true and complete entries will be made
     in accordance with GAAP and, upon the Lender's request, will permit any
     officer, employee, attorney, accountant or other agent of the Lender to
     audit, review, make extracts from or copy any and all company and financial
     books and records of the Borrower at all times during ordinary business
     hours, and to discuss the Borrower's affairs with any of its Directors,
     Officers, employees or agents.

          (b) The Borrower hereby irrevocably authorizes all accountants and
     third parties to disclose and deliver to the Lender or its designated
     agent, at the Borrower's expense, all financial information, books and
     records, work papers, management reports and other information in their
     possession regarding the Borrower.

          (c) The Borrower will permit the Lender or its employees, accountants,
     attorneys or agents, to examine and inspect any Collateral or any other
     property of the Borrower at any time during ordinary business hours.

     Section 6.10 Account Verification.

          (a) The Lender or its agent may at any time and from time to time send
     or require the Borrower to send requests for verification of accounts or
     notices of assignment to account debtors and other obligors. The Lender or
     its agent may also at any time and from time to time telephone account
     debtors and other obligors to verify accounts.

                                      -37-
<PAGE>

          (b) The Borrower shall pay when due each account payable due to a
     Person holding a Permitted Lien (as a result of such payable) on any
     Collateral.

     Section 6.11 Compliance with Laws.

          (a) The Borrower shall (i) comply with the requirements of applicable
     laws and regulations, the non-compliance with which would reasonably be
     expected to materially and adversely affect its business or its financial
     condition and (ii) use and keep the Collateral, and require that others use
     and keep the Collateral, only for lawful purposes, without violation of any
     federal, state or local law, statute or ordinance.

          (b) Without limiting the foregoing undertakings, the Borrower
     specifically agrees that it will comply with all applicable Environmental
     Laws and obtain and comply with all permits, licenses and similar approvals
     required by any Environmental Laws, and will not generate, use, transport,
     treat, store or dispose of any Hazardous Substances in such a manner as to
     create any material liability or obligation under the common law of any
     jurisdiction or any Environmental Law, except to the extent which would not
     reasonably be expected to cause a Material Adverse Effect.

          (c) The Borrower shall (i) ensure that no Owner shall be listed on the
     Specially Designated Nationals and Blocked Person List or other similar
     lists maintained by the Office of Foreign Assets Control ("OFAC"), the
     Department of the Treasury or included in any Executive Orders, (ii) not
     use or permit the use of the proceeds of the Credit Facility or any other
     financial accommodation from the Lender to violate any of the foreign asset
     control regulations of OFAC or other applicable law, (iii) comply with all
     applicable Bank Secrecy Act laws and regulations, as amended from time to
     time, and (iv) otherwise comply with the USA Patriot Act as required by
     federal law and the Lender's policies and practices.

     Section 6.12 Payment of Taxes and Other Claims. The Borrower will pay or
discharge, when due, (a) all taxes, assessments and governmental charges levied
or imposed upon it or upon its income or profits, upon any properties belonging
to it (including the Collateral) or upon or against the creation, perfection or
continuance of the Security Interest, prior to the date on which penalties
attach thereto, (b) all federal, state and local taxes required to be withheld
by it, and (c) all lawful claims for labor, materials and supplies which, if
unpaid, might by law become a Lien upon any properties of the Borrower;
provided, that the Borrower shall not be required to pay any such tax,
assessment, charge or claim whose amount, applicability or validity is being
contested in good faith by appropriate proceedings and for which proper reserves
have been made.

     Section 6.13 Maintenance of Properties.

          (a) The Borrower will keep and maintain the Collateral and all of its
     other properties necessary or useful in its business in good condition,
     repair and working order (normal wear and tear excepted) and will from time
     to time replace or repair any worn, defective or broken parts; provided,
     however, that nothing in this covenant shall prevent the Borrower from
     discontinuing the operation and maintenance of any of its properties if
     such discontinuance is, in the Borrower's judgment, desirable in the

                                      -38-
<PAGE>

     conduct of the Borrower's business and not disadvantageous in any material
     respect to the Lender. The Borrower will take all commercially reasonable
     steps necessary to protect and maintain its Intellectual Property Rights.

          (b) The Borrower will defend the Collateral against all Liens, claims
     or demands of all Persons (other than the Lender) claiming the Collateral
     or any interest therein. The Borrower will keep all Collateral free and
     clear of all Liens except Permitted Liens. The Borrower will take all
     commercially reasonable steps necessary to prosecute any Person Infringing
     its Intellectual Property Rights and to defend itself against any Person
     accusing it of Infringing any Person's Intellectual Property Rights.

     Section 6.14 Insurance. The Borrower will obtain and at all times maintain
insurance with insurers acceptable to the Lender, in such amounts, on such terms
(including any deductibles) and against such risks as may from time to time be
required by the Lender, but in all events in such amounts and against such risks
as is usually carried by companies engaged in similar business and owning
similar properties in the same general areas in which the Borrower operates.
Without limiting the generality of the foregoing, the Borrower will at all times
keep all tangible Collateral insured against risks of fire (including so-called
extended coverage), theft, collision (for Collateral consisting of motor
vehicles) and such other risks and in such amounts as the Lender may reasonably
request, with any loss payable to the Lender to the extent of its interest, and
all policies of such insurance shall contain a lender's loss payable endorsement
for the Lender's benefit. All policies of liability insurance required hereunder
shall name the Lender as an additional insured.

     Section 6.15 Preservation of Existence. The Borrower will preserve and
maintain its existence and all of its rights, privileges and franchises
necessary or desirable in the normal conduct of its business and shall conduct
its business in an orderly, efficient and regular manner.

     Section 6.16 Delivery of Instruments, etc. Upon request by the Lender, the
Borrower will promptly deliver to the Lender in pledge all instruments,
documents and chattel paper constituting Collateral, duly endorsed or assigned
by the Borrower.

     Section 6.17 Sale or Transfer of Assets; Suspension of Business Operations.
The Borrower will not sell, lease, assign, transfer or otherwise dispose of (i)
the stock of any Subsidiary, (ii) all or a substantial part of its assets, or
(iii) any Collateral or any interest therein (whether in one transaction or in a
series of transactions) to any other Person other than the sale of Inventory in
the ordinary course of business and will not liquidate, dissolve or suspend
business operations. The Borrower will not transfer any part of its ownership
interest in any Intellectual Property Rights and will not permit any agreement
under which it has licensed Licensed Intellectual Property to lapse, except that
the Borrower may transfer such rights or permit such agreements to lapse if it
shall have reasonably determined that the applicable Intellectual Property
Rights are no longer useful in its business. If the Borrower transfers any
Intellectual Property Rights for value, the Borrower will pay over the proceeds
to the Lender for application to the Obligations. The Borrower will not license
any other Person to use any of the Borrower's Intellectual Property Rights,
except that the Borrower may grant licenses in the ordinary course of its
business in connection with sales of Inventory or provision of services to its
customers.

                                      -39-
<PAGE>

     Section 6.18 Consolidation and Merger; Asset Acquisitions. The Borrower
will not consolidate with or merge into any Person, or permit any other Person
to merge into it, or acquire (in a transaction analogous in purpose or effect to
a consolidation or merger) all or substantially all the assets of any other
Person.

     Section 6.19 Sale and Leaseback. The Borrower will not enter into any
arrangement, directly or indirectly, with any other Person whereby the Borrower
shall sell or transfer any real or personal property, whether now owned or
hereafter acquired, and then or thereafter rent or lease as lessee such property
or any part thereof or any other property which the Borrower intends to use for
substantially the same purpose or purposes as the property being sold or
transferred.

     Section 6.20 Restrictions on Nature of Business. The Borrower will not
engage in any line of business materially different from that presently engaged
in by the Borrower and will not purchase, lease or otherwise acquire assets not
related to its business.

     Section 6.21 Accounting. The Borrower will not adopt any material change in
accounting principles other than as required by GAAP. The Borrower will not
adopt, permit or consent to any change in its fiscal year.

     Section 6.22 Discounts, etc. After notice from the Lender, the Borrower
will not grant any discount, credit or allowance to any customer of the Borrower
or accept any return of goods sold. The Borrower will not at any time modify,
amend, subordinate, cancel or terminate the obligation of any account debtor or
other obligor of the Borrower.

     Section 6.23 Plans. Unless disclosed to the Lender pursuant to Section
5.12, neither the Borrower nor any ERISA Affiliate will (i) adopt, create,
assume or become a party to any Pension Plan, (ii) incur any obligation to
contribute to any Multiemployer Plan, (iii) incur any obligation to provide
post-retirement medical or insurance benefits with respect to employees or
former employees (other than benefits required by law) or (iv) amend any Plan in
a manner that would materially increase its funding obligations.

     Section 6.24 Place of Business; Name. The Borrower will not transfer its
chief executive office or principal place of business, or move, relocate, close
or sell any business location. The Borrower will not permit any tangible
Collateral or any records pertaining to the Collateral to be located in any
state or area in which, in the event of such location, a financing statement
covering such Collateral would be required to be, but has not in fact been,
filed in order to perfect the Security Interest. The Borrower will not change
its name or jurisdiction of organization.

     Section 6.25 Constituent Documents; S Corporation Status. The Borrower will
not amend its Constituent Documents. The Borrower will not become an S
Corporation.

     Section 6.26 Performance by the Lender. If the Borrower at any time fails
to perform or observe any of the foregoing covenants contained in this Article
VI or elsewhere herein, and if such failure shall continue for a period of ten
calendar days after the Lender gives the Borrower written notice thereof (or in
the case of the agreements contained in Section 6.12 and Section 6.14,
immediately upon the occurrence of such failure, without notice or lapse of

                                      -40-
<PAGE>

time), the Lender may, but need not, perform or observe such covenant on behalf
and in the name, place and stead of the Borrower (or, at the Lender's option, in
the Lender's name) and may, but need not, take any and all other actions which
the Lender may reasonably deem necessary to cure or correct such failure
(including the payment of taxes, the satisfaction of Liens, the performance of
obligations owed to account debtors or other obligors, the procurement and
maintenance of insurance, the execution of assignments, security agreements and
financing statements, and the endorsement of instruments); and the Borrower
shall thereupon pay to the Lender on demand the amount of all monies expended
and all costs and expenses (including reasonable attorneys' fees and legal
expenses) incurred by the Lender in connection with or as a result of the
performance or observance of such agreements or the taking of such action by the
Lender, together with interest thereon from the date expended or incurred at the
Default Rate. To facilitate the Lender's performance or observance of such
covenants of the Borrower, the Borrower hereby irrevocably appoints the Lender,
or the Lender's delegate, acting alone, as the Borrower's attorney in fact
(which appointment is coupled with an interest) with the right (but not the
duty) from time to time to create, prepare, complete, execute, deliver, endorse
or file in the name and on behalf of the Borrower any and all instruments,
documents, assignments, security agreements, financing statements, applications
for insurance and other agreements and writings required to be obtained,
executed, delivered or endorsed by the Borrower hereunder.

                                   ARTICLE VII

                     EVENTS OF DEFAULT, RIGHTS AND REMEDIES
                     --------------------------------------

     Section 7.1 Events of Default. "Event of Default", wherever used herein,
means any one of the following events:

          (a) Default in the payment of any Obligations when they become due and
     payable;

          (b) Default in the performance, or breach, of any covenant or
     agreement of the Borrower contained in this Agreement;

          (c) An Overadvance arises as the result of any reduction in the
     Borrowing Base, or arises in any manner on terms not otherwise approved of
     in advance by the Lender in writing, and such Overadvance is not repaid or
     otherwise cured within three Business Days;

          (d) A Change of Control shall occur;

          (e) Any Financial Covenant shall become inapplicable due to the lapse
     of time and the failure to amend any such covenant to cover future periods;

          (f) The Borrower or any Guarantor shall be or become insolvent, or
     admit in writing its or his inability to pay its or his debts as they
     mature, or make an assignment for the benefit of creditors; or the Borrower
     or any Guarantor shall apply for or consent to the appointment of any
     receiver, trustee, or similar officer for it or him or for all or any
     substantial part of its or his property; or such receiver, trustee or
     similar officer shall be appointed without the application or consent of
     the Borrower or such Guarantor, as the case may be; or the Borrower or any
     Guarantor shall institute (by petition, application, answer, consent or
     otherwise) any bankruptcy, insolvency, reorganization, arrangement,

                                      -41-
<PAGE>

     readjustment of debt, dissolution, liquidation or similar proceeding
     relating to it or him under the laws of any jurisdiction; or any such
     proceeding shall be instituted (by petition, application or otherwise)
     against the Borrower or any such Guarantor; or any judgment, writ, warrant
     of attachment or execution or similar process shall be issued or levied
     against a substantial part of the property of the Borrower or any
     Guarantor;

          (g) A petition shall be filed by or against the Borrower or any
     Guarantor under the United States Bankruptcy Code or the laws of any other
     jurisdiction naming the Borrower or such Guarantor as debtor;

          (h) Any representation or warranty made by the Borrower in this
     Agreement, by any Guarantor in any Guaranty delivered to the Lender, or by
     the Borrower (or any of its Officers) or any Guarantor in any agreement,
     certificate, instrument or financial statement or other statement
     contemplated by or made or delivered pursuant to or in connection with this
     Agreement or any such Guaranty shall prove to have been incorrect in any
     material respect when deemed to be effective;

          (i) The rendering against the Borrower of an arbitration award, final
     judgment, decree or order for the payment of money in excess of $50,000 and
     the continuance of such arbitration award, judgment, decree or order
     unsatisfied and in effect for any period of 30 consecutive days without a
     stay of execution;

          (j) A default under any bond, debenture, note or other evidence of
     material indebtedness of the Borrower owed to any Person other than the
     Lender, or under any indenture or other instrument under which any such
     evidence of indebtedness has been issued or by which it is governed, or
     under any material lease or other contract in excess of $50,000, and the
     expiration of the applicable period of grace, if any, specified in such
     evidence of indebtedness, indenture, other instrument, lease or contract;

          (k) Any Reportable Event, which the Lender determines in good faith
     might constitute grounds for the termination of any Pension Plan or for the
     appointment by the appropriate United States District Court of a trustee to
     administer any Pension Plan, shall have occurred and be continuing 30 days
     after written notice to such effect shall have been given to the Borrower
     by the Lender; or a trustee shall have been appointed by an appropriate
     United States District Court to administer any Pension Plan; or the Pension
     Benefit Guaranty Corporation shall have instituted proceedings to terminate
     any Pension Plan or to appoint a trustee to administer any Pension Plan; or
     the Borrower or any ERISA Affiliate shall have filed for a distress
     termination of any Pension Plan under Title IV of ERISA; or the Borrower or
     any ERISA Affiliate shall have failed to make any quarterly contribution
     required with respect to any Pension Plan under Section 412(m) of the IRC,
     which the Lender determines in good faith may by itself, or in combination
     with any such failures that the Lender may determine are likely to occur in
     the future, result in the imposition of a Lien on the Borrower's assets in
     favor of the Pension Plan; or any withdrawal, partial withdrawal,
     reorganization or other event occurs with respect to a Multiemployer Plan
     which results or could reasonably be expected to result in a material
     liability of the Borrower to the Multiemployer Plan under Title IV of
     ERISA;

          (l) An event of default shall occur under any Security Document;

                                      -42-
<PAGE>

          (m) The Borrower shall liquidate, dissolve, terminate or suspend its
     business operations or otherwise fail to operate its business in the
     ordinary course, merge with another Person unless the Borrower is the
     surviving entity; or sell or attempt to sell all or substantially all of
     its assets, without the Lender's prior written consent;

          (n) Any Guarantor shall repudiate, purport to revoke or fail to
     perform any obligation under such Guaranty in favor of the Lender, any
     individual Guarantor shall die or any other Guarantor shall cease to exist;

          (o) The Borrower shall take or participate in any action which would
     be prohibited under the provisions of any Subordination Agreement or make
     any payment on the Subordinated Indebtedness (as defined in the
     Subordination Agreement) that any Person was not entitled to receive under
     the provisions of the Subordination Agreement;

          (p) Any event or circumstance with respect to the Borrower shall occur
     such that the Lender shall believe in good faith that the prospect of
     payment of all or any part of the Obligations or the performance by the
     Borrower under the Loan Documents is impaired or any material adverse
     change in the business or financial condition of the Borrower shall occur;

          (q) Any breach, default or event of default by or attributable to any
     Affiliate under any agreement between such Affiliate and the Lender shall
     occur; or

          (r) The indictment of any Director, Officer, Guarantor, or any Owner
     of the Borrower for a felony offence under state or federal law.

     Section 7.2 Rights and Remedies. During any Default Period, the Lender may
exercise any or all of the following rights and remedies:

          (a) The Lender may, by notice to the Borrower, declare the Commitment
     to be terminated, whereupon the same shall forthwith terminate;

          (b) The Lender may, by notice to the Borrower, declare the Obligations
     to be forthwith due and payable, whereupon all Obligations shall become and
     be forthwith due and payable, without presentment, notice of dishonor,
     protest or further notice of any kind, all of which the Borrower hereby
     expressly waives;

          (c) The Lender may, without notice to the Borrower and without further
     action, apply any and all money owing by the Lender to the Borrower to the
     payment of the Obligations;

          (d) The Lender may exercise and enforce any and all rights and
     remedies available upon default to a secured party under the UCC, including
     the right to take possession of Collateral, or any evidence thereof,
     proceeding without judicial process or by judicial process (without a prior
     hearing or notice thereof, which the Borrower hereby expressly waives) and
     the right to sell, lease or otherwise dispose of any or all of the
     Collateral (with or without giving any warranties as to the Collateral,
     title to the Collateral or similar warranties), and, in connection
     therewith, the Borrower will on demand assemble the Collateral and make it
     available to the Lender at a place to be designated by the Lender which is
     reasonably convenient to both parties;

                                      -43-
<PAGE>

          (e) The Lender may make demand upon the Borrower and, forthwith upon
     such demand, the Borrower will pay to the Lender in immediately available
     funds for deposit in the Special Account pursuant to Section 2.4 an amount
     equal to the aggregate maximum amount available to be drawn under all
     Letters of Credit then outstanding, assuming compliance with all conditions
     for drawing thereunder;

          (f) The Lender may exercise and enforce its rights and remedies under
     the Loan Documents;

          (g) The Lender may without regard to any waste, adequacy of the
     security or solvency of the Borrower, apply for the appointment of a
     receiver of the Collateral, to which appointment the Borrower hereby
     consents, whether or not foreclosure proceedings have been commenced under
     the Security Documents and whether or not a foreclosure sale has occurred;
     and

          (h) The Lender may exercise any other rights and remedies available to
     it by law or agreement.

          Notwithstanding the foregoing, upon the occurrence of an Event of
     Default described in Section 7.1(f) or (g), the Obligations shall be
     immediately due and payable automatically without presentment, demand,
     protest or notice of any kind. If the Lender sells any of the Collateral on
     credit, the Obligations will be reduced only to the extent of payments
     actually received. If the purchaser fails to pay for the Collateral, the
     Lender may resell the Collateral and shall apply any proceeds actually
     received to the Obligations.

     Section 7.3 Certain Notices. If notice to the Borrower of any intended
disposition of Collateral or any other intended action is required by law in a
particular instance, such notice shall be deemed commercially reasonable if
given (in the manner specified in Section 8.3) at least ten calendar days before
the date of intended disposition or other action.

                                  ARTICLE VIII

                                  MISCELLANEOUS
                                  -------------

     Section 8.1 No Waiver; Cumulative Remedies; Compliance with Laws. No
failure or delay by the Lender in exercising any right, power or remedy under
the Loan Documents shall operate as a waiver thereof; nor shall any single or
partial exercise of any such right, power or remedy preclude any other or
further exercise thereof or the exercise of any other right, power or remedy
under the Loan Documents. The remedies provided in the Loan Documents are
cumulative and not exclusive of any remedies provided by law. The Lender may
comply with any applicable state or federal law requirements in connection with
a disposition of the Collateral and such compliance will not be considered
adversely to affect the commercial reasonableness of any sale of the Collateral.

     Section 8.2 Amendments, Etc. No amendment, modification, termination or
waiver of any provision of any Loan Document or consent to any departure by the
Borrower therefrom or any release of a Security Interest shall be effective
unless the same shall be in writing and signed by the Lender, and then such
waiver or consent shall be effective only in the specific instance and for the
specific purpose for which given. No notice to or demand on the Borrower in any

                                      -44-
<PAGE>

case shall entitle the Borrower to any other or further notice or demand in
similar or other circumstances.

     Section 8.3 Notices; Communication of Confidential Information; Requests
for Accounting. Except as otherwise expressly provided herein, all notices,
requests, demands and other communications provided for under the Loan Documents
shall be in writing and shall be (a) personally delivered, (b) sent by first
class United States mail, (c) sent by overnight courier of national reputation,
(d) transmitted by telecopy, or (e) sent as electronic mail, in each case
delivered or sent to the party to whom notice is being given to the business
address, telecopier number, or e mail address set forth below next to its
signature or, as to each party, at such other business address, telecopier
number, or e mail address as it may hereafter designate in writing to the other
party pursuant to the terms of this Section. All such notices, requests, demands
and other communications shall be deemed to be an authenticated record
communicated or given on (a) the date received if personally delivered, (b) when
deposited in the mail if delivered by mail, (c) the date delivered to the
courier if delivered by overnight courier, or (d) the date of transmission if
sent by telecopy or by e mail, except that notices or requests delivered to the
Lender pursuant to any of the provisions of Article II shall not be effective
until received by the Lender. All notices, financial information, or other
business records sent by either party to this Agreement may be transmitted,
sent, or otherwise communicated via such medium as the sending party may deem
appropriate and commercially reasonable; provided, however, that the risk that
the confidentiality or privacy of such notices, financial information, or other
business records sent by either party may be compromised shall be borne
exclusively by the Borrower. All requests for an accounting under Section 9-210
of the UCC (i) shall be made in a writing signed by a Person authorized under
Section 2.2(a), (ii) shall be personally delivered, sent by registered or
certified mail, return receipt requested, or by overnight courier of national
reputation, (iii) shall be deemed to be sent when received by the Lender and
(iv) shall otherwise comply with the requirements of Section 9-210. The Borrower
requests that the Lender respond to all such requests which on their face appear
to come from an authorized individual and releases the Lender from any liability
for so responding. The Borrower shall pay the Lender the maximum amount allowed
by law for responding to such requests.

     Section 8.4 Further Documents. The Borrower will from time to time execute,
deliver, endorse and authorize the filing of any and all instruments, documents,
conveyances, assignments, security agreements, financing statements, control
agreements and other agreements and writings that the Lender may reasonably
request in order to secure, protect, perfect or enforce the Security Interest or
the Lender's rights under the Loan Documents (but any failure to request or
assure that the Borrower executes, delivers, endorses or authorizes the filing
of any such item shall not affect or impair the validity, sufficiency or
enforceability of the Loan Documents and the Security Interest, regardless of
whether any such item was or was not executed, delivered or endorsed in a
similar context or on a prior occasion).

     Section 8.5 Costs and Expenses. The Borrower shall pay on demand all costs
and expenses, including reasonable attorneys' fees, incurred by the Lender in
connection with the Obligations, this Agreement, the Loan Documents, any Letter
of Credit and any other document or agreement related hereto or thereto, and the
transactions contemplated hereby, including all such costs, expenses and fees
incurred in connection with the negotiation, preparation, execution, amendment,
administration, performance, collection and enforcement of the Obligations and

                                      -45-
<PAGE>

all such documents and agreements and the creation, perfection, protection,
satisfaction, foreclosure or enforcement of the Security Interest.

     Section 8.6 Indemnity. In addition to the payment of expenses pursuant to
Section 8.5, the Borrower shall indemnify, defend and hold harmless the Lender,
and any of its participants, parent corporations, subsidiary corporations,
affiliated corporations, successor corporations, and all present and future
officers, directors, employees, attorneys and agents of the foregoing (the
"Indemnitees") from and against any of the following (collectively, "Indemnified
Liabilities"):

          (i) Any and all transfer taxes, documentary taxes, assessments or
     charges made by any governmental authority by reason of the execution and
     delivery of the Loan Documents or the making of the Revolving Advances;

          (ii) Any claims, loss or damage to which any Indemnitee may be
     subjected if any representation or warranty contained in Section 5.14
     proves to be incorrect in any respect or as a result of any violation of
     the covenant contained in Section 6.11(b); and

          (iii) Any and all other liabilities, losses, damages, penalties,
     judgments, suits, claims, costs and expenses of any kind or nature
     whatsoever (including the reasonable fees and disbursements of counsel) in
     connection with the foregoing and any other investigative, administrative
     or judicial proceedings, whether or not such Indemnitee shall be designated
     a party thereto, which may be imposed on, incurred by or asserted against
     any such Indemnitee, in any manner related to or arising out of or in
     connection with the making of the Revolving Advances and the Loan Documents
     or the use or intended use of the proceeds of the Revolving Advances.

     If any investigative, judicial or administrative proceeding arising from
     any of the foregoing is brought against any Indemnitee, upon such
     Indemnitee's request, the Borrower, or counsel designated by the Borrower
     and satisfactory to the Indemnitee, will resist and defend such action,
     suit or proceeding to the extent and in the manner directed by the
     Indemnitee, at the Borrower's sole costs and expense. Each Indemnitee will
     use its best efforts to cooperate in the defense of any such action, suit
     or proceeding. If the foregoing undertaking to indemnify, defend and hold
     harmless may be held to be unenforceable because it violates any law or
     public policy, the Borrower shall nevertheless make the maximum
     contribution to the payment and satisfaction of each of the Indemnified
     Liabilities which is permissible under applicable law. The Borrower's
     obligation under this Section 8.6 shall survive the termination of this
     Agreement and the discharge of the Borrower's other obligations hereunder.

     Section 8.7 Participants. The Lender and its participants, if any, are not
partners or joint venturers, and the Lender shall not have any liability or
responsibility for any obligation, act or omission of any of its participants.
All rights and powers specifically conferred upon the Lender may be transferred
or delegated to any of the Lender's participants, successors or assigns.

     Section 8.8 Execution in Counterparts; Telefacsimile Execution. This
Agreement and other Loan Documents may be executed in any number of
counterparts, each of which when so executed and delivered shall be deemed to be

                                      -46-
<PAGE>

an original and all of which counterparts, taken together, shall constitute but
one and the same instrument. Delivery of an executed counterpart of this
Agreement by telefacsimile shall be equally as effective as delivery of an
original executed counterpart of this Agreement. Any party delivering an
executed counterpart of this Agreement by telefacsimile also shall deliver an
original executed counterpart of this Agreement but the failure to deliver an
original executed counterpart shall not affect the validity, enforceability, and
binding effect of this Agreement.

     Section 8.9 Retention of the Borrower's Records. The Lender shall have no
obligation to maintain any electronic records or any documents, schedules,
invoices, agings, or other papers delivered to the Lender by the Borrower or in
connection with the Loan Documents for more than 30 days after receipt by the
Lender. If there is a special need to retain specific records, the Borrower must
inform the Lender of its need to retain those records with particularity, which
must be delivered in accordance with the notice provisions of Section 8.3 within
30 days of the Lender taking control of same.

     Section 8.10 Binding Effect; Assignment; Complete Agreement; Sharing
Information. The Loan Documents shall be binding upon and inure to the benefit
of the Borrower and the Lender and their respective successors and assigns,
except that the Borrower shall not have the right to assign its rights
thereunder or any interest therein without the Lender's prior written consent.
To the extent permitted by law, the Borrower waives and will not assert against
any assignee any claims, defenses or set-offs which the Borrower could assert
against the Lender. This Agreement shall also bind all Persons who become a
party to this Agreement as a borrower. This Agreement, together with the Loan
Documents, comprises the complete and integrated agreement of the parties on the
subject matter hereof and supersedes all prior agreements, written or oral, on
the subject matter hereof. To the extent that any provision of this Agreement
contradicts other provisions of the Loan Documents, this Agreement shall
control. Without limiting the Lender's right to share information regarding the
Borrower and its Affiliates with the Lender's participants, accountants, lawyers
and other advisors, the Lender may share any and all information they may have
in their possession regarding the Borrower and its Affiliates, and the Borrower
waives any right of confidentiality it may have with respect to such sharing of
information.

     Section 8.11 Severability of Provisions. Any provision of this Agreement
which is prohibited or unenforceable shall be ineffective to the extent of such
prohibition or unenforceability without invalidating the remaining provisions
hereof.

     Section 8.12 Headings. Article, Section and subsection headings in this
Agreement are included herein for convenience of reference only and shall not
constitute a part of this Agreement for any other purpose.

     Section 8.13 Governing Law; Jurisdiction, Venue; Waiver of Jury Trial. The
Loan Documents shall be governed by and construed in accordance with the
substantive laws (other than conflict laws) of the State of Colorado. The
parties hereto hereby (i) consent to the personal jurisdiction of the state and
federal courts located in the State of Colorado in connection with any
controversy related to this Agreement; (ii) waive any argument that venue in any
such forum is not convenient; (iii) agree that any litigation initiated by the
Lender or the Borrower in connection with this Agreement or the other Loan

                                      -47-
<PAGE>

Documents may be venued in either the state or federal courts located in the
City and County of Denver, Colorado; and (iv) agree that a final judgment in any
such suit, action or proceeding shall be conclusive and may be enforced in other
jurisdictions by suit on the judgment or in any other manner provided by law.

     Section 8.14 Joint and Several Liability. All obligations of Tradestar and
Petroleum Engineers under this Agreement (including the Obligations), the Note,
the other Loan Documents, and any other instrument, agreement or document
delivered to the Lender by any of Tradestar and Petroleum Engineers, shall be
(a) joint and several and (b) the primary obligation of each of Tradestar and
Petroleum Engineers. All references to the term "Borrower" herein shall refer to
each of Tradestar and Petroleum Engineers separately and to all of them jointly
and all such Persons shall be bound both severally and jointly with the others.
The Obligations shall include all debts, liabilities and obligations owed to the
Lender by any of Tradestar and Petroleum Engineers solely or by all or any of
them jointly or jointly and severally. Each of Tradestar and Petroleum Engineers
acknowledges and agrees that its joint and several liability on the Obligations
is absolute and unconditional and shall not in any manner be affected or
impaired by any acts or omissions whatsoever by the Lender, and without limiting
the generality of the foregoing, the joint and several liability of each of
Tradestar and Petroleum Engineers on the Obligations shall not be impaired by
any acceptance by the Lender of any other security for or guarantors upon the
Obligations or by any failure, neglect or omission on the Lender's part to
resort to any one or all of Tradestar and Petroleum Engineers's payment of the
Obligations or to realize upon or protect any collateral security therefor. The
joint and several liability of each of Tradestar and Petroleum Engineers on the
Obligations shall not in any manner be impaired or affected by who receives or
uses the proceeds of the Revolving Advances or benefits of the Letters of Credit
or for what purposes such credits and financial accommodations are used, and
each of Tradestar and Petroleum Engineers waives notice of Revolving Advance
requests issued by, and Revolving Advances made to, any of Tradestar and
Petroleum Engineers. Such joint and several liability of each of Tradestar and
Petroleum Engineers shall also not be impaired or affected by (and the Lender,
without notice to anyone, is hereby authorized to make from time to time) any
sale, pledge, surrender, compromise, settlement, release, renewal, extension,
indulgence, alteration, substitution, exchange, change in, modification or
disposition of any collateral security for the Obligations or of any guaranty
thereof. In order to enforce payment of the Obligations, foreclose or otherwise
realize on any Collateral, or exercise any other rights granted hereunder or
under any other Loan Document or under applicable law, the Lender shall be under
no obligation at any time to first resort to any Collateral, Liens, or any other
property, rights or remedies whatsoever, and the Lender shall have the right to
enforce the Obligations irrespective of whether or not other proceedings or
steps are pending, seeking resort to or realization upon or from any of the
foregoing. Each of Tradestar and Petroleum Engineers hereby agrees not to
exercise or enforce any right of exoneration, contribution, reimbursement,
recourse, or subrogation available to such Person against any other Person
liable for payment of any Obligations, or as to any security therefor, unless
and until the Obligations have been paid and satisfied in full after the
expiration of all Letters of Credit, release by the Lender of the Security
Interest and termination of the Credit Facility. By its acceptance below, each
of Tradestar and Petroleum Engineers hereby expressly waives and surrenders any
defense to its joint and several liability on the Obligations based upon any of
the foregoing. All property described in the definition of "Collateral" shall be
included as Collateral, whether it is owned jointly by all or any of Tradestar
and Petroleum Engineers or is owned in whole or in part by one (or more) of

                                      -48-
<PAGE>

them. Notwithstanding anything herein to the contrary, the right of recovery
against each of Tradestar and Petroleum Engineers under this Agreement shall not
exceed $1.00 less than the lowest amount which would render such Person's
obligation under this Agreement void or voidable under applicable law, including
without limitation, fraudulent conveyance law. Notices from the Lender to any of
Tradestar and Petroleum Engineers shall constitute notice to all. Directions,
instructions, actions, representations, warranties or covenants, including
Revolving Advance requests and requests for issuances of Letters of Credit, made
by any of Tradestar and Petroleum Engineers to the Lender shall be binding on
all and the Lender shall be entitled to conclusively presume that any action by
any of Tradestar and Petroleum Engineers hereunder or under any Loan Document is
taken on behalf of any one or more of them, as the case may be, whether or not
such Person so indicates.

             [The remainder of this page intentionally left blank.]

                                      -49-
<PAGE>

THE BORROWER AND THE LENDER WAIVE ANY RIGHT TO TRIAL BY JURY IN ANY ACTION AT
LAW OR IN EQUITY OR IN ANY OTHER PROCEEDING BASED ON OR PERTAINING TO THIS
AGREEMENT OR ANY OTHER LOAN DOCUMENT.

Borrower's Initials /s/ KLT  /s/ CJD ;  Lender's Initials /s/ MET.

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

Petroleum Engineers, Inc.                  PETROLEUM ENGINEERS, INC.
500 Dover Boulevard, Suite 310
Lafayette, Louisiana  70503                By:   /s/ Kenneth L. Thomas
                                                 ---------------------
Telecopier:  (337)-984-0589                Name: Kenneth L. Thomas
Attention:  K. Thomas                      Its:  Chief Financial Officer
e-mail:  KThomas@PEIINC.com

Tradestar Construction Services, Inc.      TRADESTAR CONSTRUCTION SERVICES, INC.
3451 Candeleria, NE, Suite A
Albuquerque, New Mexico  87107             By:   /s/ Clarence Joseph Downs
                                                 -------------------------
Telecopier:  (505) 872-3133                Name: Clarence Joseph Downs
Attention:  Clarence Joseph Downs          Its:  President
e-mail:  joe@tradestarconst.com

Wells Fargo Bank, National Association,    WELLS FARGO BANK, NATIONAL
acting through its Wells Fargo Business    ASSOCIATION, acting through its
Credit operating division                  Wells Fargo Business Credit
MAC-C7300-210                              operating division
1740 Broadway
                                           By:   /s/ Martin E. Tracey
                                                 --------------------
Denver, Colorado  80274                    Name: Martin E. Tracey
Telecopier:  (303) 863-4904                Its:  Vice President
Attention:  Martin E. Tracy
e-mail: Martin.E.Tracy@wellsfargo.com

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00104-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00104-of-00352.parquet"}]]