Document:

<PAGE>

                     [TEXAS ASSOCIATION OF REALTORS LOGO]

                      IMPROVED PROPERTY COMMERCIAL LEASE

 USE OF THIS FORM BY PERSONS WHO ARE NOT MEMBERS OF THE TEXAS ASSOCIATION OF
                         REALTORS IS NOT AUTHORIZED.
  (COPYRIGHT) TEXAS ASSOCIATION OF REALTORS(REGISTERED TRADEMARK), INC. 1996

--------------------------------------------------------------------------------
                               Table of Contents
                               -----------------
NO.    PARAGRAPH DESCRIPTION                                          PG.
---    ---------------------                                          ---

 1     Parties                                                         2

 2     Leased Premises                                                 2

 3     Term                                                            2
       A   Term
       B   Delay of Occupancy

 4     Rent and Expenses                                               2
       A   Base Monthly Rent
       B   Prorated Rent
       C   Additional Rent
       D   Place of Payment
       E   Method of Payment
       F   Late Charges
       G   Returned Checks

 5     Security Deposit                                                3

 6     Taxes                                                           3

 7     Utilities                                                       3

 8     Tenant's Insurance                                              3

 9     Use and Hours                                                   3

       A   Tenant's Normal Business Hours
       B   Building Operating Hours

10     Legal Compliance                                                4

11     Signs                                                           4

12     Access By Landlord                                              4

13     Move-In Condition                                               4

14     Move-Out Condition                                              4

15     Maintenance and Repairs                                         5
       A   Cleaning
       B   Repairs of Conditions Caused by a Party
       C   Repair and Maintenance Responsibility
       D   Repair Persons
       E   HVAC Service Contract
       F   Common Areas
       G   Notice of Repairs
       H   Failure to Repair

16     Alterations                                                     6

17     Liens                                                           6

18     Liability                                                       6

19     Indemnity                                                       6

20     Default                                                         6

21     Abandonment, Interruption of Utilities, Lockout                 7

NO.    PARAGRAPH DESCRIPTION                                          PG.
---    ---------------------                                          ---
22     Holdover                                                        7

23     Landlord's Lien                                                 7

24     Assignment and Subletting                                       7
25     Relocation                                                      7

26     Subordination                                                   7
27     Estoppel Certificates                                           7

28     Casualty Loss                                                   8
29     Condemnation                                                    8

30     Attorney's Fees                                                 8
31     Representations                                                 8

32     Broker's Fees                                                   8

33     Addenda                                                         9

34     Agreement of Parties                                            9

35     Notices                                                         9

36     Special Provisions                                              9

                               ADDENDA & EXHIBITS
                               ------------------
                             (check all that apply)

[X]    Property Description Exhibit

[ ]    Addendum for Broker's Fee

[ ]    Expense Addendum for Single-Tenant Property

[ ]    Expense Reimbursement Addendum

[ ]    Net Addendum

[ ]    Percentage Rent Addendum
[ ]    Parking Addendum

[X]    Landlord's Rules and Regulations

[ ]    Commercial Lease Guaranty
[ ]    Optional Space Addendum

[ ]    Leasehold Construction Addendum (Landlord to
         Complete Construction)

[ ]    Leasehold Construction Addendum (Tenant to Complete
         Construction)

[X]    Addendums A through F
       ------------------------------------------------------------------------

[ ]    ------------------------------------------------------------------------

<TABLE>
<CAPTION>
<S>                   <C>
(TAR-2101) 10-19-98          Initialed for Identification by Tenants:[LOGO],      , and Landlord: [LOGO]
                                                                     ------  -----                -------
</TABLE>

This form was prepared with Formulator v3.0, 5480 Valmont Rd., Suite 200,
Boulder CO 80301    800-336-1027

                                                                     Page 1 of 9

<PAGE>

[TEXAS ASSOCIATION OF REALTORS LOGO]

                      IMPROVED PROPERTY COMMERCIAL LEASE

 USE OF THIS FORM BY PERSONS WHO ARE NOT MEMBERS OF THE TEXAS ASSOCIATION OF
                         REALTORS IS NOT AUTHORIZED.
  (COPYRIGHT) TEXAS ASSOCIATION OF REALTORS(REGISTERED TRADEMARK), INC. 1996

<TABLE>
<CAPTION>
<S>     <C>

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1.     PARTIES: The parties to this lease are the owner of the Property T.W. Manufacturing, Inc.
                                                                       ------------------------------------------------
                                                                                                        (Landlord) and
       ------------------------------------------------------------------------------------------------
       the tenant Synergy Technologies Corporation
                 ------------------------------------------------------------------------------------------------------
                                                                                                              (Tenant).
       ------------------------------------------------------------------------------------------------------

2.     LEASED PREMISES: Landlord leases to Tenant the following described real property, known as the "leased premises,"
       along with all its improvements:

       NUMBER             (suite or unit), containing approximately   7,870 + 1,290    square feet of rentable area,
             --------------                                        -------------------
       located within the                                     #2 and #4                                     (building or
                         -----------------------------------------------------------------------------------
       complex name) on the land known as  1689 Hawthorne Drive, Conroe, Texas 77301-3284
                                          ------------------------------------------------------------------------------
                                                                                 (address, city, state) which is legally
       -----------------------------------------------------------------------------------------------------------------
       described as See Addendum "A"
                    ----------------------------------------------------------------------------------------------------
                                                                                                     or [X] as described
       ----------------------------------------------------------------------------------------------
       on attached exhibit. "Property" means the building or complex in which the leased premises are located, inclusive
       of any common areas, drives, parking areas, and walks. The parties agree that the rentable area of the leased
       premises may not equal the actual or useable area within the leased premises and may include an allocation of
       common areas in the Property.

3.     TERM:

       A.  Term: The term of this lease is   60  months, commencing on                     January 1, 2002
           -----                          -------                      -------------------------------------------------
           (Commencement Date) and ending on                           December 31, 2006               (Expiration Date).
                                            -----------------------------------------------------------

       B.  Delay of Occupancy: If Tenant is unable to occupy the leased premises on the Commencement Date because of
           construction on the leased premises to be completed by Landlord that is not substantially complete or a prior
           tenant's holding over of the leased premises, Landlord will not be liable to Tenant for such delay and this
           lease will remain enforceable. In the event of such a delay, the Commencement Date will automatically be
           extended to the date Tenant is able to occupy the Property and the Expiration Date will also be extended by
           a like number of days, so that the term of this lease remains unchanged. If Tenant is unable to occupy the
           leased premises after the 30th day after the Commencement Date because of construction on the leased premises
           to be completed by Landlord that is not substantially complete or a prior tenant's holding over of the leased
           premises, Tenant may terminate this lease by giving written notice to Landlord before the leased premises
           become available to be occupied by Tenant and Landlord will refund to Tenant any amounts paid to Landlord by
           Tenant. This Paragraph 3B does not apply to any delay in occupancy caused by cleaning or repairs.

4.     RENT AND EXPENSES:

       A.  Base Monthly Rent: On or before the first day of each month during this lease, Tenant will pay Landlord base
           monthly rent in the amount of see Addendum "B". The first full base monthly rent is due on or before
                                        ------------------
                 January 1, 2002
           -----------------------------.

       B.  Prorated Rent: If the Commencement Date is on a day other than the first day of a month, Tenant will pay
           Landlord as prorated rent, an amount equal to the base monthly rent multiplied by the following fraction: the
           number of days from the Commencement Date to the first day of the following month divided by the number of
           days in the month in which this lease commences. The prorated rent is due on or before the Commencement Date.

       C.  Additional Rent: In addition to any base monthly rent or prorated rent, Tenant will pay Landlord all other
           amounts as provided by the attached:
           [ ]  (1)  Net Addendum
           [ ]  (2)  Percentage Rent Addendum
           [ ]  (3)  Expense Reimbursement Addendum
           [ ]  (4)  Expense Addendum for Single-Tenant Property
           [ ]  (5)  Parking Addendum
           [ ]  (6)  ---------------------------------------------------------------------------------------------------

(TAR-2101) 10-19-98          Initialed for Identification by Tenants:  [LOGO]   ,           , and Landlord: [LOGO]
                                                                     ----------- -----------               --------

This form was prepared with Formulator v3.0, 5480 Valmont Rd., Suite 200, Boulder CO 80301  800-336-1027

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                                                                     Page 2 of 9
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Commercial Lease concerning:                    1689 Hawthorne Drive, Conroe, Texas 77301-3284
                            --------------------------------------------------------------------------------------------

       D.  Place of Payment: Tenant will remit all amounts due Landlord under this lease to
                                                                                           -----------------------------
           at                                                                                          or to such other
             ------------------------------------------------------------------------------------------
           person or at such other place as Landlord may designate in writing.

       E.  Method of Payment: Tenant must pay all rent timely without demand, deduction, or offset, except as permitted
           by law or this lease. Time is of the essence for the payment of rent. If Tenant fails to timely pay any
           amounts due under this lease or if any check of Tenant is returned to Landlord by the institution on which
           it was drawn, Landlord may require Tenant to pay, in addition to any other available remedy, all amounts due
           under this lease by certified funds by providing written notice to Tenant.

       F.  Late Charges: If Landlord does not actually receive a rent payment at the designated place of payment within
           5 days after the date the rent is due, Tenant will pay Landlord a late charge equal to 5% of the base
           monthly rent. The mailbox is not the agent for receipt for Landlord. The late charge is a cost associated with
           the collection of rent and Landlord's acceptance of a late charge does not waive Landlord's rights to exercise
           remedies under Paragraph 20.

       G.  Returned Checks: Tenants will pay    $25    (not to exceed $25) for each check Tenant tenders to Landlord
                                            -----------
           which is returned by the institution on which it is drawn for any reason, plus any late charges until Landlord
           receives payment.

5.     SECURITY DEPOSIT: Upon execution of this lease, Tenant will pay a security deposit to Landlord in the amount of
           one (1) month's rent    . Landlord may apply the security deposit to any amounts owed by Tenant under this
       ----------------------------
       lease. If Landlord applies any part of the security deposit during any time this lease is in effect to amounts
       owed by Tenant, Tenant must, within 10 days after receipt of notice from Landlord, restore the security deposit
       to the amount stated. Within a reasonable time after this lease ends, Landlord will refund the security deposit
       to Tenant less any amounts applied toward amounts owed by Tenant.

6.     TAXES: See Addendum "C".

7.     UTILITIES: Tenant will pay all charges for the use of all utility services to the leased premises and any
       connection charges except the following which will be paid by Landlord: Landlord has order electric meter service
                                                                              ------------------------------------------
        for these buildings, Landlord will order separate gas meters if the need arises due to leases to other parties.
       ------------------------------------------------------------------------------------------------------------------
       NOTICE: Tenant should determine if any and all necessary utilities (e.g., water, gas, electricity, telephone,
       sewer, etc.) are available to the leased premises, are adequate for Tenant's intended use, and the cost to
       provide the necessary utilities.

8.     TENANT'S INSURANCE:

       A. During all times this lease is in effect, Tenant must maintain in full force and effect:

          (1) public liability insurance from an insurer acceptable to Landlord in an amount not less than $1,000,000
                                                                                                           -----------
          ---------------------------------------------- on an occurrence basis naming Landlord as an additional Insured;
          and

          (2) personal property damage insurance for Tenant's business operations on the leased premises from an insurer
          acceptable to Landlord in an amount not less than                        $200,000
                                                            -------------------------------------------------------------
          on an occurrence basis.

       B. Before the Commencement Date, Tenant must provide Landlord with a copy of the insurance certificates evidencing the
          required coverage. If the insurance coverage changes in any manner or degree at any time this lease is in effect,
          Tenant must provide Landlord a copy of an insurance certificate evidencing such change within 10 days of the
          change.

       C. If Tenant fails to maintain the required insurance in full force and effect at all times this lease is in effect,
          Landlord may: (1) purchase such insurance on behalf of Tenant and Tenant must immediately reimburse Landlord for
          such expense; or (2) exercise Landlord's remedies under Paragraph 20.

       D. If there is an increase in Landlord's insurance premiums for the leased premises or Property or its contents that
          is caused by Tenant, Tenant's use of the leased premises, or any improvements made by or for Tenant, Tenant
          will, for each year this lease is in effect pay Landlord the increase immediately after Landlord notifies
          Tenant of the increase.

9.     USE AND HOURS: Tenant may use the leased premises for the following purpose and no other:
                                                                                                  ---------------------------
       ----------------------------------------------------------------------------------------------------------------------

       [X] A. Tenant's Normal Business Hours: Tenant's normal business hours are (specify hours, days of week, and if
           inclusive or exclusive of weekends and holidays): 8am through 5pm Monday through Friday but activity could be
           taking place 24 hours a day, seven days a week.
           -------------------------------------------------------------------------------------------------------------

       Tenant will keep the leased premises open substantially during Tenant's normal business hours.

(TAR-2101) 10-19-98          Initialed for Identification by Tenants:  [LOGO]   ,           , and Landlord: [LOGO]
                                                                     ----------- -----------               --------

This form was prepared with Formulator v3.0, 5480 Valmont Rd., Suite 200, Boulder CO 80301  800-336-1027
</TABLE>

                                                                    Page 3 of 9

<PAGE>

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Commercial Lease concerning:                    1689 Hawthorne Drive, Conroe, Texas 77301-3284
                            --------------------------------------------------------------------------------------------

       [ ] B. Building Operating Hours: The building in which the leased premises are located maintains operating hours
              of (specify hours, days of week, and if inclusive or exclusive of weekends and holidays): N/A
                                                                                                        ----------------
              ----------------------------------------------------------------------------------------------------------
              If Landlord is to provide HVAC services to the leased premises under this lease, Landlord is obligated to
              provide the HVAC services only during the specified building operating hours.

10.    LEGAL COMPLIANCE:

       A. SEE ADDENDUM "D"

11.    SIGNS:
..
       A.  Tenant may not post or paint any signs at, on, or about the leased premises or Property without Landlord's
           written consent. Landlord may remove any unauthorized sign, and Tenant will promptly reimburse Landlord for
           any expense related to the removal of any unauthorized sign. Any authorized sign must comply with all laws,
           restrictions, zoning ordinances, and any governmental order relating to signs on the leased premises or Property.
           Landlord may temporarily remove any authorized sign to complete repairs or alterations to the leased premises
           or the Property.

       B.  By providing written notice to Tenant before this lease ends, Landlord may require Tenant, upon move-out and at
           Tenant's expense, to remove, without damage to the Property or leased premises, any or all signs that were placed
           on the Property or leased premises by or at the request of Tenant. Any signs that Landlord does not require Tenant
           to remove and that are fixtures become the property of the Landlord and must be surrendered to Landlord at the
           time this lease ends.

12.    ACCESS BY LANDLORD:

       A.  During Tenant's normal business hours Landlord may enter the leased premises for any reasonable purpose, including
           but not limited to purposes for repairs, maintenance, alterations, and showing the leased premises to prospective
           tenants or purchasers. Landlord may access the leased premises after Tenant's normal business hours with Tenant's
           permission or to complete emergency repairs. Landlord will not unreasonably interfere with Tenant's business
           operations when accessing the leased premises.

       B.  During the last     30     days of this lease, Landlord may place a "For Lease" or similarly worded sign in the
                           ---------
           leased premises.

13.   MOVE-IN CONDITION: Tenant has inspected the leased premises and accepts it in its present (as-is) condition unless
      expressly noted otherwise in this lease.  Landlord and any agent have made no express or implied warranties as to the
      condition or permitted use of the leased premises or Property.

14.   MOVE-OUT CONDITION AND FORFEITURE OF TENANT'S PERSONAL PROPERTY: SEE ADDENDUM "E"

      A.

(TAR-2101) 10-19-98          Initialed for Identification by Tenants:  [LOGO]   ,           , and Landlord: [LOGO]
                                                                     ----------- -----------               --------

This form was prepared with Formulator v3.0, 5480 Valmont Rd., Suite 200, Boulder CO 80301  800-336-1027
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                                                                    Page 4 of 9

<PAGE>

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<S>     <C>
Commercial Lease concerning:                    1689 Hawthorne Drive, Conroe, Texas 77301-3284
                            --------------------------------------------------------------------------------------------

     B.   If Tenant leaves any personal property in the leased premises after Tenant surrenders possession of the leased
          premises, Landlord may: (1) require Tenant, at Tenant's expense, to remove the personal property by providing
          written notice to Tenant; or (2) retain such personal property as forfeited property to Landlord.

     C.   "Surrender" means vacating the leased premises and returning all keys and access devices to Landlord. "Normal
          wear and tear" means deterioration that occurs without negligence, carelessness, accident, or abuse.

     D.   By providing written notice to Tenant before this lease ends, Landlord may require Tenant, upon move-out and at
          Tenant's expense, to remove, without damage to the Property or leased premises, any or all fixtures that were
          placed on the Property or leased premises by or at the request of Tenant. Any fixtures that Landlord does not
          require Tenant to remove become the property of the Landlord and must be surrendered to Landlord at the time
          this lease ends.

15.  MAINTENANCE AND REPAIRS:

     A.   Cleaning: Tenant must keep the leased premises clean and sanitary and promptly dispose of all garbage in
          appropriate receptacles.   [ ] Landlord   [X] Tenant will provide, at its expense, reasonable janitorial
          services to the leased premises.

     B.   Repairs of Conditions Caused by a Party: Each party must promptly repair a condition caused, either
          intentionally or negligently, by that party or that party's guests, patrons, invitees, contractors or
          permitted subtenants.

     C.   Repair and Maintenance Responsibility: Except as provided by Paragraph 15B, the party designated below, at
          its expense, is responsible to maintain and repair the following specified items in the leased premises.
          The specified items must be maintained in: (i) clean condition; (ii) good repair; and (iii) operable
          condition. If a modification to any of the specified items is required by law or governmental regulation
          or order, the party designated to maintain the item must complete and pay the expense of the modification.
          The specified items include and relate only to real property in the leased premises. Tenant is responsible
          for the repair and maintenance of its personal property.
</TABLE>

<TABLE>
<CAPTION>
                                                                                     N/A              Landlord              Tenant
                                                                                     ---              --------              ------
<S>                                                                                 <C>              <C>                   <C>
          (1)  Foundation, exterior walls, roof, and other structural components      [ ]                [X]                   [ ]

          (2)  Glass and windows                                                      [ ]                [ ]                   [X]

          (3)  Fire protection equipment                                              [ ]                [ ]                   [X]

          (4)  Exterior & overhead doors, including closure devices, molding,
               locks, and hardware                                                    [ ]                [ ]                   [X]

          (5)  Grounds maintenance, including landscaping                             [ ]                [ ]                   [X]

          (6)  Interior doors, including closure devices, frames, molding, locks,
               and hardware                                                           [ ]                [ ]                   [X]

          (7)  Parking areas and walks                                                [ ]                [ ]                   [X]

          (8)  Plumbing systems, drainage systems, electrical systems (including      [ ]                [ ]                   [X]
               ballast and lamp replacement) & mechanical systems, except those
               specifically designated otherwise

          (9)  Heating Ventilation and Air Conditioning (HVAC) systems                [ ]                [ ]                   [X]

          (10) Signs                                                                  [ ]                [ ]                   [ ]

          (11) Extermination and pest control, excluding wood-destroying insects      [ ]                [ ]                   [X]

          (12) Storage yards and storage buildings                                    [ ]                [ ]                   [X]

          (13) Wood-destroying insect treatment and repairs                           [ ]                [ ]                   [X]

          (14) Cranes and related systems                                             [ ]                [ ]                   [ ]

          (15) ____________________________________________                           [ ]                [ ]                   [ ]

          (16) ____________________________________________                           [ ]                [ ]                   [ ]

          (17) All other items and systems                                            [ ]                [ ]                   [ ]

      D.  Repair Persons: Repairs must be completed by trained, qualified, and insured repair persons.

(TAR-2101) 10-19-98          Initialed for Identification by Tenants:  [LOGO]   ,           , and Landlord: [LOGO]
                                                                     ----------- -----------               --------

This form was prepared with Formulator v3.0, 5480 Valmont Rd., Suite 200, Boulder CO 80301  800-336-1027
</TABLE>
                                                                  Page 5 of 9
<PAGE>

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Commercial Lease concerning:                    1689 Hawthorne Drive, Conroe, Texas 77301-3284
                            --------------------------------------------------------------------------------------------

      E.  HVAC Service Contract: If Tenant is responsible to maintain the HVAC system, Tenant [ ] is  [ ] is not required
          to maintain, at its expense, a regularly scheduled maintenance and service contract for the HVAC system. The
          maintenance and service contract must be purchased from a HVAC maintenance company that regularly provides such
          contracts to similar properties. If Tenant fails to maintain a required HVAC maintenance and service contract in
          effect at all times during this lease, Landlord may do so and charge Tenant the  expense of such a maintenance
          and service contract or exercise Landlord's remedies under Paragraph 20.

      F.  Common Areas: Landlord will maintain any common areas in the Property in a manner as Landlord determines to be in
          the best interest of the Property. Landlord will maintain any elevator and signs in the common area. Landlord may
          change the size, dimension, and location of any common areas, provided that such change does not materially
          impair Tenant's use and access to the leased premises. If a modification to the common areas is required by law
          or governmental regulation or order, Landlord will modify the item. Tenant has the non-exclusive license to use
          the common areas in compliance with Landlord's rules and restrictions. Tenant may not solicit any business in the
          common areas or interfere with any other person's right to use the common areas.

      G.  Notice of Repairs: Tenant must promptly notify Landlord of any item that is in need of repair and that is
          Landlord's responsibility to repair. All requests for repairs to Landlord must be in writing.

      H.  Failure to Repair: Landlord must make a repair for which Landlord is responsible within a reasonable period
          of time after Tenant provides Landlord written notice of the needed repair. If Tenant fails to repair or maintain
          an item for which Tenant is responsible within 10 days after Landlord provides Tenant written notice of the
          needed repair or maintenance, Landlord may: (1) repair or maintain the item, without liability for any damage
          or loss to Tenant, and Tenant must immediately reimburse Landlord for the cost to repair or maintain; or (2)
          exercise Landlord's remedies under Paragraph 20.

16.   ALTERATIONS:

      A.  Tenant may not alter, improve, or add to the Property or the leased premises without Landlord's written consent.
          Landlord will not unreasonably withhold consent for the Tenant to make reasonable alterations, modifications, or
          improvements to the leased premises.

      B.  Tenant may not alter any locks or any security devices on the Property or the leased premises without Landlord's
          consent. If Landlord authorizes the changing, addition, or rekeying of any locks or other security devices, Tenant
          must immediately deliver the new keys and access devices to Landlord.

      C.  If a governmental order requires alteration or modification to the leased premises, the party obligated to
          maintain and repair the item to be modified or altered as designated in Paragraph 15 will, at its expense,
          modify or alter the item in compliance with the order.

      D.  Any alterations, improvements, fixtures or additions to the Property or leased premises installed by either
          party during the term of this lease will become Landlord's property and must be surrendered to Landlord at the
          time this lease ends, except for those fixtures Landlord requires Tenant to remove under Paragraph 14 or if the
          parties agree otherwise in writing.

17.   LIENS: Tenant may not do anything that will cause the title of the Property or leased premises to be encumbered in any
      way. If Tenant causes a lien to be filed against the Property or leased premises, Tenant will within 20 days after
      Landlord demands Tenant to take action to remove the lien, pay the lien or take whatever action is necessary to cause
      the lien to be released of record. Tenant will provide Landlord a copy of any release Tenant obtains pursuant to this
      paragraph.

18.   LIABILITY: To the extent permitted by law, Landlord is NOT responsible to Tenant or Tenant's employees, patrons,
      guests, or invitees for any damages, injuries, or losses to person or property caused by:

      A.   an act, omission, or neglect of: Tenant; Tenant's agent; Tenant's guest; Tenant's employees; Tenant's patrons;
           Tenant's invitees; or any other tenant on the Property;

      B.   fire, flood, water leaks, ice, snow, hail, winds, explosion, smoke, riot, strike, interruption of utilities, theft,
           burglary, robbery, assault, vandalism, other persons, environmental contaminants, or other occurrences or
           casualty losses,

19.   INDEMNITY: Tenant will indemnify and hold Landlord harmless from any property damage, personal injury, suits, actions,
      liabilities, damages, cost of repairs or service to the leased premises or Property, or any other loss caused,
      negligently or otherwise, by Tenant or Tenant's employees, patrons, guests, or invitees.

20.   DEFAULT:

      A.   If Landlord fails to comply with this lease within 30 days after Tenant notifies Landlord of Landlord's failure to
           comply, Landlord will be in default and Tenant may seek any remedy provided by law. If, however, Landlord's
           non-compliance reasonably requires more than 30 days to cure, Landlord will not be in default if the cure is
           commenced within the 30 day period and is diligently pursued.

(TAR-2101) 10-19-98          Initialed for Identification by Tenants:  [LOGO]   ,           , and Landlord: [LOGO]
                                                                     ----------- -----------               --------

This form was prepared with Formulator v3.0, 5480 Valmont Rd., Suite 200, Boulder CO 80301  800-336-1027
</TABLE>

                                                                 Page 6 of 9

<PAGE>
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Commercial Lease concerning:                    1689 Hawthorne Drive, Conroe, Texas 77301-3284
                            --------------------------------------------------------------------------------------------

       B.   If Landlord does not actually receive at the place designated for payment any rent due under this lease
            within 5 days after it is due, Tenant will be in default. If Tenant fails to comply with this lease for any
            other reason within 10 days after Landlord notifies Tenant of its failure to comply, Tenant will be in
            default.

       C.   If Tenant is in default, Landlord may: (i) terminate Tenant's right to occupy the leased premises by
            providing Tenant with at least 3 days written notice; and (ii) accelerate all rents which are payable during
            the remainder of this lease or any renewal period without default notice or demand. Landlord will attempt
            to mitigate any damage or loss caused by Tenant's breach. If Tenant is in default, Tenant will be liable for:

            (1) any lost rent;
            (2) Landlord's cost of reletting the leased premises, including brokerage fees, advertising fees, and other
                fees necessary to relet the leased premises;
            (3) repairs to the leased premises for use beyond normal wear and tear;
            (4) all Landlord's costs associated with eviction of Tenant, such as attorney's fees, court costs, and
                prejudgment interest;
            (5) all Landlord's costs associated with collection of rent such as collection fees, late charges, and
                returned check charges;
            (6) cost of removing any equipment and trade-fixtures left on the leased premises by Tenant;
            (7) cost to remove any trash, debris, personal property, hazardous materials, or environmental contaminants
                left by Tenant or Tenant's employees, patrons, guests, or invitees in the leased premises or Property;
                and
            (8) any other recovery to which Landlord may be entitled by law.

21.    ABANDONMENT, INTERRUPTION OF UTILITIES, REMOVAL OF TENANT'S PROPERTY, AND LOCKOUT: Chapter 93 of the Texas Property
       Code governs the rights and obligations of the parties with regard to: (a) abandonment of the leased premises; (b)
       interruption of utilities; (c) removal of Tenant's personal property; and (d) "lock-out" of Tenant.

22.    HOLDOVER: If Tenant fails to vacate the leased premises at the time this lease ends, Tenant will become a tenant-
       at-will and must vacate the leased premises immediately upon receipt of demand from Landlord. No holding over by
       Tenant, with or without the consent of Landlord, will extend this lease. Tenant will indemnify Landlord and any
       prospective tenants for any and all damages caused by the holdover. Rent for any holdover period will be 2 times the
       base monthly rent plus any additional rent calculated on a daily basis and will be immediately due and payable daily
       without notice or demand.

23.    LANDLORD'S LIEN AND SECURITY INTEREST: To secure Tenant's performance under this lease, Tenant grants to Landlord
       a lien and security interest against all of Tenant's nonexempt personal property that is in the leased premises
       or Property. This lease is a security agreement for the purposes of the Uniform Commercial Code. Landlord may file
       a copy of this lease as a financing statement.

24.    ASSIGNMENT AND SUBLETTING: Tenant may not assign this lease or sublet any part of the leased premises without
       Landlord's written consent. An assignment of this lease or subletting of the leased premises without Landlord's
       written consent is voidable by Landlord. If Tenant assigns this lease or sublets any part of the leased premises,
       Tenant will remain liable for all of Tenant's obligations under this lease regardless if the assignment or
       sublease is made with or without the consent of Landlord.

25.    RELOCATION:

26.    SUBORDINATION:

       A.   This lease and Tenant's leasehold interest are and will be subject, subordinate, and inferior to:

            (1) any lien, encumbrance, or ground lease now or hereafter placed on the leased premises or the Property
                by Landlord;
            (2) all advances made under any such lien, encumbrance, or ground lease;
            (3) the interest payable on any such lien or encumbrance;
            (4) any and all renewals and extensions of any such lien, encumbrance, or ground lease;
            (5) any restrictive covenant affecting the leased premises or the Property; and
            (6) the rights of any owners' association affecting the leased premises or Property.

       B.   Tenant must, on demand, execute any instrument subordinating this lease as Landlord may request, provided
            that such subordination is made on the condition that this lease and Tenant's rights under this lease are
            recognized by the lien-holder.

27.    ESTOPPEL CERTIFICATES: Within 10 days after receipt of a written request from Landlord, Tenant will execute and
       deliver to Landlord an estoppel certificate that identifies: (a) when this lease commences and ends; (b) any
       amendments to this lease; (c)

(TAR-2101) 10-19-98          Initialed for Identification by Tenants:  [LOGO]   ,           , and Landlord: [LOGO]
                                                                     ----------- -----------               --------

This form was prepared with Formulator v3.0, 5480 Valmont Rd., Suite 200, Boulder CO 80301  800-336-1027
</TABLE>

                                                                    Page 7 of 9

<PAGE>

<TABLE>
<CAPTION>
<S>     <C>
Commercial Lease concerning:                    1689 Hawthorne Drive, Conroe, Texas 77301-3284
                            --------------------------------------------------------------------------------------------

       any rights that Tenant may have to extend this lease or purchase the Property or leased premises; (d) any
       default by Landlord; and (e) any other information reasonably requested in the certificate.

28.    CASUALTY LOSS:

       A.   Tenant must immediately notify Landlord of any casualty loss in the leased premises. Within 20 days after
            receipt of Tenant's notice of a casualty loss, Landlord will notify Tenant if the leased premises are less
            than or more than 50% unusable, on a per square foot basis, and if Landlord can substantially restore the
            leased premises within 120 days after Tenant notifies Landlord of the casualty loss.

       B.   If the leased premises are less than 50% unusable and Landlord can substantially restore the leased premises
            within 120 days after Tenant notifies Landlord of the casualty, Landlord will restore the leased premises
            to substantially the same condition as before the casualty. If Landlord fails to substantially restore within
            the time required, Tenant may terminate this lease.

       C.   If the leased premises are more than 50% unusuable and Landlord can substantially restore the leased premises
            within 120 days after Tenant notifies Landlord of the casualty, Landlord may: (1) terminate this lease; or
            (2) restore the leased premises to substantially the same condition as before the casualty. If Landlord chooses
            to restore and does not substantially restore the leased premises within the time required, Tenant may terminate
            this lease.

       D.   If Landlord notifies Tenant that Landlord cannot substantially restore the leased premises within 120 days after
            Tenant notifies Landlord of the casualty loss, Landlord may: (1) choose not to restore and terminate this lease;
            or (2) choose to restore, notify Tenant of the estimated time to restore, and give Tenant the option to terminate
            this lease by notifying Landlord within 10 days.

       E.   If this lease does not terminate because of a casualty loss, rent will be reduced from the date Tenant notifies
            Landlord of the casualty loss to the date the leased premises are substantially restored by an amount proportionate
            to the extent the leased premises are unusable.

29.    CONDEMNATION: If after a condemnation or purchase in lieu of condemnation the leased premises are totally unusable for
       the purposes stated in this lease, this lease will terminate. If after a condemnation or purchase in lieu of condemnation
       the leased premises are partially unusable for the purposes stated in this lease, this lease will continue and rent will
       be reduced in an amount proportionate to the extent the leased premises are unusable. Any condemnation award or proceeds
       in lieu of condemnation are the property of Landlord and Tenant has no claim to such proceeds or award. Tenant may seek
       compensation from the condemning authority for its moving expenses and damages to Tenant's personal property.

30.    ATTORNEY'S FEES: Any person who is a prevailing party in any legal proceeding brought under or related to the transaction
       described in this lease is entitled to recover prejudgment interest, reasonable attorney's fees, and all other costs of
       litigation from the nonprevailing party.

31.    REPRESENTATIONS: Tenant's statements in this lease and any application for rental are material representations relied
       upon by Landlord. Each party signing this lease represents that he or she is of legal age to enter into a binding
       contract and is authorized to sign the lease. If Tenant makes any misrepresentation in this lease or in any application
       for rental, Tenant is in default. Landlord is not aware of any material defect on the Property that would affect the
       health and safety of an ordinary person or any environmental hazard on or affecting the Property that would affect the
       health or safety of an ordinary person, except: ______________________________________________________________________
       ______________________________________________________________________________________________________________________
       ______________________________________________________________________________________________________________________

32.    BROKERS' FEES:

       A: _____________________________________________________________________________________________ (Broker A) represents
       [X] Landlord       [ ] Tenant.    Broker A's fees will be paid pursuant to (choose 1 or 2):

       [X] (1) a separate written agreement between Broker A and [X] Landlord [ ] Tenant [ ] Broker __________.
       [ ] (2) the attached Addendum for Broker's Fee.

       B: _____________________________________________________________________________________________ (Broker B) represents
       [ ] Landlord       [ ] Tenant.    Broker B's fees will be paid pursuant to (choose 1 or 2):

       [ ] (1) a separate written agreement between Broker B and [ ] Landlord [ ] Tenant [ ] Broker __________.
       [ ] (2) the attached Addendum for Broker's Fee.

       C: _____________________________________________________________________________________________ (Broker C) represents
       [ ] Landlord       [ ] Tenant.    Broker C's fees will be paid pursuant to (choose 1 or 2):

       [ ] (1) a separate written agreement between Broker C and [ ] Landlord [ ] Tenant [ ] Broker __________.
       [ ] (2) the attached Addendum for Broker's Fee.

(TAR-2101) 10-19-98          Initialed for Identification by Tenants:  [LOGO]   ,           , and Landlord: [LOGO]
                                                                     ----------- -----------               --------

This form was prepared with Formulator v3.0, 5480 Valmont Rd., Suite 200, Boulder CO 80301  800-336-1027
</TABLE>

                                                                 Page 8 of 9
<PAGE>

<TABLE>
<CAPTION>
<S>     <C>
Commercial Lease concerning:                    1689 Hawthorne Drive, Conroe, Texas 77301-3284
                            --------------------------------------------------------------------------------------------

33.    ADDENDA: Incorporated into this lease are the addenda, exhibits and other information marked in the Addenda and
       Exhibit section of the Table of Contents. If Landlord's Rules and Regulations are made part of this lease, Tenant
       agrees to comply with the Rules and Regulations as Landlord may, at its discretion, amend from time to time.

34.    AGREEMENT OF PARTIES:

       A. Entire Agreement: This lease contains the entire agreement between Landlord and Tenant and may not be changed
          except by written agreement.
       B. Binding Effect: This lease is binding upon and inures to the benefit of the parties and their respective heirs,
          executors, administrators, successors, and permitted assigns.
       C. Joint and Several: All Tenants are jointly and severally liable for all provisions of this lease. Any act or notice
          to, or refund to, or signature of, any one or more of the Tenants regarding any term of this lease, its renewal, or
          its termination is binding on all Tenants.
       D. Controlling Law: The laws of the State of Texas govern the interpretation, performance, and enforcement of this
          lease.
       E. Severable Clauses: If any clause in this lease is found invalid or unenforceable by a court of law, the remainder
          of this lease will not be affected and all other provisions of this lease will remain valid and enforceable.
       F. Waiver: Landlord's delay, waiver, or non-enforcement of acceleration, contractual or statutory lien, rental due date,
          or any other right will not be deemed a waiver of any other or subsequent breach by Tenant or any other term in this
          lease.
       G. Quiet Enjoyment: Provided that Tenant is not in default of this lease, Landlord covenants that Tenant will enjoy
          possession and use of the leased premises free from serious interference.
       H. Force Majeure:  If Landlord's performance of a term in this lease is delayed by strike, lock-out, shortage of
          material, governmental restriction, riot, flood, or any cause outside Landlord's control, the time for Landlord's
          performance will be abated until after the delay.

35.   NOTICES: All notices under this lease must be in writing and are effective when hand-delivered, sent by mail, or sent by
      facsimile transmission to:

      Tenant                                                           Landlord
      at the address of the leased premises.                           at P.O. Box 9358
                                                                          ----------------------------------------------------
                                                                          The Woodlands, Texas 77380
                                                                          ----------------------------------------------------
                                                                       Fax: Email:lwebster@txucom.net
                                                                            --------------------------------------------------
      with a copy to: Attention: Mr. Scott Eldredge                    with a copy to:
                      -----------------------------------                               --------------------------------------
      at Burg Simpson                                                  at
         ------------------------------------------------                 ----------------------------------------------------
      40 Inverness Drive East, Englewood, CO 80112
      ---------------------------------------------------              -------------------------------------------------------
      Fax: 303-708-0527  Phone: 303-792-5595                           Fax:
      ---------------------------------------------------              -------------------------------------------------------

36.   SPECIAL PROVISIONS:

Real estate brokers are not qualified to render legal advice, property inspections, surveys, engineering studies (e.g.
studies of the structures, drainage, and soil conditions), environmental assessments, tax advice, financial advice, or
inspections to determine compliance with zoning, governmental regulations, or any law (e.g., ADA, Texas Architectural
Barriers Statute, etc.). The parties should seek experts to render such services. Selection of such experts is the
responsibility of the parties and not the real estate broker. The terms of this lease are negotiable among the parties.
This is intended to be a legal agreement binding upon final acceptance. READ IT CAREFULLY. If you do not understand the
effect of this Lease, consult your attorney BEFORE signing.

T.W. Manufacturing, Inc.
Lorrie Webster                         11-10-01                  Thomas Cooley                    11/10/01
---------------------------------------------------------        -------------------------------------------------------------
Landlord                                 Date                    Tenant           Thomas Cooley     Date

By   Lorrie Webster
   ------------------------------------------------------        -------------------------------------------------------------
                      Lorrie Webster                             Tenant                             Date

as    President                              for Landlord
   -----------------------------------------

(TAR-2101) 10-19-98          Initialed for Identification by Tenants:  [LOGO]   ,           , and Landlord: [LOGO]
                                                                     ----------- -----------               --------

This form was prepared with Formulator v3.0, 5480 Valmont Rd., Suite 200, Boulder CO 80301  800-336-1027
</TABLE>

                                                                Page 9 of 9<PAGE>

                AGREEMENT BETWEEN U.S. ONCURE TECHNOLOGIES CORP.
                              AND CRC PARTNERS LTD.

         THIS AGREEMENT made this 28th day of June, 2001 by and between CRC
Partners Ltd., a Florida Limited Partnership (hereinafter referred to as CRC)
and OnCure Technologies Corp., formerly U.S. CancerCare, Inc., a Florida
corporation with its principal place of business at 700 Ygnacio Valley Road,
Walnut Creek, California 94596 (hereinafter OnCure) (both hereinafter
collectively referred to as the Parties).

         WHEREAS, CRC previously was the holder of a Promissory Note in the
original principal amount of $300,000.00, the Maker of which was OnCure (the
Note), and the holder of 60,000 warrants to buy common stock at 2.00 per share.

         WHEREAS, OnCure and CRC entered into an Agreement dated August 9, 2000,
which in part granted to CRC the irrevocable right to convert the Note to
150,000 shares of Common Stock ($.01 par value) of OnCure (Common Stock) at any
time prior to May 1, 2001 upon delivery to OnCure of the Note, and

         WHEREAS, the Agreement further provided that in the event the 150,000
shares of Common Stock of OnCure were not registered with the Securities
Exchange Commission (Commission) and freely tradable without restriction on or
before May 1, 2001, OnCure (or its Successors and/or Assigns) would purchase the
Common Stock from CRC at a purchase price of $2.00 per share plus Ten (10%)
percent interest on the initial principal amount of the Note of $3,000,000.00
from date of conversion, and

         WHEREAS, CRC has delivered the Note to OnCure and has converted the
Note to Common Stock effective December 30, 2000 (Conversion Date), and

         WHEREAS, As part of the original promissory note agreement, OnCure
granted to CRC a warrant to acquire 60,000.00 shares of Common Stock at $2.00
per share, and

         WHEREAS, OnCure is agreeable to reducing the warrant exercise price to
$.01 per share for extension of the Put Right as more specifically set forth
herein; and

         WHEREAS, CRC is agreeable to exercising its warrant to acquire 60,000
shares at $.01 per share using accrued interest owed on the Note as
consideration for this exercise.

         NOW, THEREFORE, in consideration of the mutual promises contained
herein as well as other good and valuable consideration, the receipt and
adequacy of which is hereby acknowledged, the Parties, intending to be legally
bound, hereby agree as follows:

         1. RECITALS. The Parties hereby agree the above referenced recitals are
true and correct and are incorporated herein.

         2. RIGHT TO PUT. Commencing December 1, 2001 and continuing to June 1
2002, CRC shall have the right to demand OnCure (or its Successors and/or
Assigns) to purchase 150,000 shares of Common Stock (which such shares were
converted into Common Stock when

<PAGE>

CRC converted its Note) from it at a purchase price equal to $2.00 per share
plus interest at 10% percent per annum as set forth herein. The interest shall
accrue from December 30, 2000.

         2.1 CRC shall retain the right for a period of six (6) months from
December 1, 2001 through and including June 1, 2002 to sell the Common Stock to
OnCure (its Successors, representatives and/or Assigns) for a purchase price of
$2.00 per share plus 10% percent, interest on the sum of $300,000.00 from
December 30, 2000 (the "Put Right"). The Put Right shall expire on mid-night of
June 1, 2002.

         2.2 OnCure agrees that the Put Right of CRC is absolute and that OnCure
has no claim, defense, or off-set that or will in any way impede, restrict, or
prohibit CRC from exercising the Put Right in accordance with this Agreement.

         2.3 In the event that CRC desires to exercise its Put Right as set
forth in Section 2, it shall provide OnCure with written notice of its intent.

         2.4 OnCure shall remit payment by certified funds, bank check or wire
transfer and payment shall be received by CRC no later than five (5) days from
CRC's written notice to exercise its Put Right.

         2.5 In the event that CRC transfers, sells, assigns, hypothecates,
pledges or otherwise disposes the aforesaid Common Stock, the Put right shall
terminate. Notwithstanding this provision, in the event said stock is, however,
transferred, conveyed, sold, or distributed to any partner, whether general or
limited of CRC, then said Put Right shall inure to said transferred partner, who
shall have the same Put Right as CRC.

         2.6 CRC agrees that in the event it exercises its right to put the
Common Stock to OnCure all certificate(s) surrendered herein will be properly
endorsed and otherwise in proper form for transfer.

         2.7 In the event that any of the Common Stock Certificates are lost,
stolen or destroyed, OnCure's transfer agent or share registrar will, issue in
exchange for such loss, stolen or destroyed certificates, upon the making of an
Affidavit of that fact by CRC replacement certificate(s).

         2.8 The Parties hereto agree that the exercise price of the warrant to
acquire 60,000 shares that is the subject of this Agreement and which is being
exercised pursuant to this Agreement shall be reduced from $2.00 per share to
$.01 per share.

         2.9 OnCure agrees that the 150,000 shares of Common Stock have been
included in SB-2 Registration Statement that has been filed, but not declared
effective by the Commission. OnCure agrees that it will not take any action or
omit to act when required to do so that would cause these shares to be removed
from the registration statement.

         3. EXERCISE OF WARRANT. CRC hereby exercises its warrant to acquire
60,000 shares of Common Stock of OnCure at $.01 per share and hereby pays to
OnCure the sum of $600.00 as and in for consideration for the exercise of said
warrant, said sums to be deducted

                                     Page 2
<PAGE>

from the interest accrued and owing to CRC in the amount of $14,301.36 through
June 22, 2001. CRC acknowledges that it will be receiving "restricted
securities" as defined by Rule 144 of the Securities Act of 1933, as amended.

         3.1 The Parties hereby stipulate and agree that the interest owed to
CRC at the rate of 10% percent per annum through June 22, 2001 is $13,701.30,
after deduction for payment of the consideration for the exercise of 60,000
warrants, which consideration is accepted by OnCure.

         3.2 The Parties further recognize and agree that interest will continue
to accrue from June 22, 2001 pursuant to this Agreement on the principal balance
of $300,000.00 at 10% percent per annum.

         3.3 OnCure agrees that the 60,000 shares of Common Stock have been
included in an SB-2 Registration Statement that has been field, but not declared
effective by the Commission. OnCure agrees that it will not take any action or
omit to act when required to do so that would cause these shares to be removed
from the registration statement.

         4. DEFAULT. In the event that OnCure fails to pay to CRC upon proper
exercise by CRC its right to Put the Common Stock, it shall pay interest at the
highest legal rate permitted by law, said interest to be in addition to any
other sums due and owing to CRC herein.

         5. COUNTERPARTS AND FACSIMILE EXECUTION. This Agreement may be executed
in any number of counterparts. All executed counterparts will constitute one
Agreement notwithstanding that all signators are not signatories to the original
or the same counterpart. Execution by exchange of facsimile transmissions will
be deemed legally sufficient and bind the signatory; however, the Parties will,
for aesthetic purposes prepare a fully executed original version of this
Agreement.

         6. REMEDIES. No delay or omission on the part of any Party in
exercising any right or remedy, will operate as a waiver of said right or
remedy.

         7. SURVIVAL OF CONDITIONS. Representations and Warranties. The several
representations, warranties and covenants of the Parties contained herein will
survive execution hereof.

         8. SEVERABILITY. Whenever legally possible, each provision of this
Agreement will be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Agreement is held to be invalid,
illegal or unenforceable in any respect under any applicable law or rule in any
jurisdiction, such invalidity, illegality or unenforceability will not affect
any other provision, but this Agreement will be interpreted, construed and
enforced in such jurisdiction as if such invalid, illegal or unenforceable
provision had never been contained herein.

         9. ENTIRE AGREEMENT. This Agreement contains the entire understanding
of the Parties with respect to the subject matter of this Agreement. There are
no restrictions, agreements, promises, warranties, covenants or undertakings
other than those expressly set forth

                                     Page 3
<PAGE>

herein. This Agreement supercedes all prior agreements and understandings
between the Parties with respect to the subject matter.

         10. AMENDMENTS AND EXTENSIONS. This Agreement may not be amended,
extended or terminated orally, and no attempt to change, terminate or waive any
of the provisions hereof will be binding unless in writing and signed by the
Party against whom the amendment, change, termination or waiver is sought to be
enforced.

         11. NEGOTIATED TRANSACTION. The provisions of this Agreement were
negotiated by the Parties hereto and this Agreement will be deemed to have been
drafted by all of the Parties, and this Agreement will not be interpreted more
or less favorably in favor of or against a Party based on its authorship.

         12. GOVERNING LAWS AND VENUE. The Parties hereby submit that in the
event that it is necessary to enforce, construe or interpret this Agreement or
any provision contained in this Agreement, that said action shall be brought by
either Party in the appropriate court having jurisdiction in Palm Beach County,
Florida. Each party hereby waives any claim that venue is inconvenient and,
specifically stipulates that the appropriate court in Palm Beach County having
jurisdiction over the enforcement, construction or interpretation of this
Agreement, shall be in the appropriate court and appropriate venue for such
purpose.

         The Parties hereby agree not to institute any action or legal
proceeding arising out or relating to this Agreement in any other court or
tribunal except the appropriate court having jurisdiction in Palm Beach County,
Florida.

         13. CONSTRUCTION OF AGREEMENT. The Parties hereby agree with this
Agreement, however, will be construed, interpreted and enforced in accordance
with, and governed by the laws of the State of Florida.

         14. ATTORNEYS FEES AND COSTS. In the event that it is necessary for
either Party to enforce this Agreement, said Party, in the event that it
prevails, shall be entitled to receive from the non-prevailing party, all fees
and costs incurred, which shall be deemed to include but not limited to, filing
fees, service of process, mediator fees, attorney's fees, expert fees, court
expenses or any other necessary and/or reasonable costs incurred in pursuing
enforcement of this Agreement.

         15. NOTICES. Any notice to be given under this Agreement may be given
either personally or by mail, facsimile or overnight courier. If mailed, notice
shall be deemed to be effective three (3) days after deposited in registered or
certified mail with postage thereon prepaid addressed when mailed to:

                 As to OnCure:       Attention:  Jeffrey A. Goffman
                                     OnCure Technologies Corp.
                                     700 Ygnacio Valley Road, Suite 300
                                     Walnut Creek, California  94596

                                     Page 4
<PAGE>

                 As to CRC:          Mr. Elliott Loewenstein
                                     3350 N.W. Boca Raton Boulevard, Suite 38B
                                     Boca Raton, FL  33431
                                     (561) 395-8980 (fax)
                                     ocrest1@aol.com (email)

         If given in any other manner, such notice shall be deemed to be
effective (i) when given personally, (ii) when given by facsimile (if followed
by a copy delivered by registered or certified mail or (iii) one (1) day after
given to a recognized national overnight courier to be delivered.

                                     Page 5
<PAGE>

         IN WITNESS WHEREOF, the Parties have caused this Agreement to be
executed effective as of the last date set forth below.

                                       CRC Partners Ltd.,
                                       A Florida Limited Partnership

                                       By: /s/ Elliot Lowenstern
                                           ---------------------
                                           BRETT HOLDING, INC.
                                           a Delaware corporation
                                           and general partner through
                                           its President Elliott A. Loewenstein

                                       Title:  President
                                       Date:  June 28, 2001

                                       OnCure Technologies Corp.
                                       a Florida corporation, formerly
                                       U.S. CancerCare, Inc.

                                       By: /s/ Jeffrey Goffman
                                           -------------------
                                       Name:  Jeffrey Goffman
                                       Title: CEO
                                       Date:  6/28/01

                                     Page 6

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