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                                                                   EXHIBIT 10.7A

AGENCY:  CALIFORNIA DEPARTMENT OF CORRECTIONS                      LEASE #L-1724

PROJECT: CHUCKAWALLA VALLEY STATE PRISON

                            AMENDMENT NO. 1 TO LEASE

         This Amendment to Lease, made and entered into this 24th day of March,
1999, by and between the STATE OF CALIFORNIA, acting by and through its Director
of General Services, with the approval of the California Department of
Corrections, hereinafter called "STATE" and Labor to Industry, Incorporated,
hereinafter called "LESSEE".

                                   WITNESSETH

         WHEREAS, the parties hereto entered into that certain lease dated
September 1, 1998, for approximately 20,300 square feet of warehouse space and
approximately 16,000 (square feet) of space on C Facility, for a total of 36,300
square feet, located within the boundaries of the Chuckawalla Valley State
Prison, situated in the County of Riverside, State of California; and

         WHEREAS, the STATE desires to amend said lease to amend Paragraph #6,
TERMINATION, of said lease to increase the notice time.

         NOW, THEREFORE, it is mutually agreed between the parties hereto as
follows:

         1.       The parties hereto agree that either party may terminate this
                  Lease at anytime during the term hereof by giving notice to
                  the other party in writing ninety (90) days prior to the date
                  when termination shall become effective. Notice must be given
                  in accordance with the instructions contained in paragraph 14
                  herein.

Except as expressly amended herein, all of the terms and conditions of said
lease shall remain unchanged and in full force and effect.

                                                                   Exhibit 10.7A
                                                                          Page 1
<PAGE>   2

         IN WITNESS WHEREOF, this Amendment No. 1 to lease has been executed by
the parties hereto on the date written below.

STATE OF CALIFORNIA                         LESSEE:    LABOR TO INDUSTRY, INC.
DEPARTMENT OF GENERAL SERVICES
REAL ESTATE SERVICES DIVISION               BY:        /S/ John P. Brocard
                                                       -------------------------
                                                       JOHN P. BROCARD

Approval Recommended:                       TITLE:     Executive Vice President
                                                       -------------------------

BY:    /S/ Carolyn Momser                   DATE:      May 7, 1999
       ----------------------------                    -------------------------
       CAROLYN MOMSER

TITLE: REAL ESTATE OFFICER                  TELEPHONE: 770-565-4311
       ----------------------------                    -------------------------

DATE:  6/17/1999
       ----------------------------

DIRECTOR, DEPARTMENT OF GENERAL SERVICES:

BY:    /S/ Cheryl L. Allen
       ----------------------------
       CHERYL L. ALLEN

TITLE: Senior Real Estate Officer
       ----------------------------

DATE:  6/17/1999
       ----------------------------

APPROVED:

STATE OF CALIFORNIA
DEPARTMENT OF CORRECTIONS

BY:    /S/ Judy Buckman
       ----------------------------
       JUDY BUCKMAN CHIEF

TITLE: BUSINESS MANAGEMENT BRANCH

DATE:
       ----------------------------

STATE OF CALIFORNIA
DEPARTMENT OF CORRECTIONS
CHUCKAWALLA VALLEY STATE PRISON

BY:    /S/ Rick Butler
       ----------------------------
       RICK BUTLER

TITLE: WARDEN
       ----------------------------

DATE:  4/19/1999
       ----------------------------

                                                                   Exhibit 10.7A
                                                                          Page 2<PAGE>   1
                                                                   EXHIBIT 10.7B

AGENCY:  Department of Corrections                             LEASE No.: L-1724

PROJECT: Chuckawalla Valley State Prison

                            AMENDMENT NO. 2 TO LEASE

         This Amendment to Lease, dated for reference purposes only, May 7,
2001, by and between the State of California, acting by and through its Director
of General services, with the approval of the Department of Corrections,
hereinafter called STATE, and Labor-to-Industry, Inc., hereinafter called
LESSEE.

                                   WITNESSETH

         WHEREAS, the parties hereto entered into that certain Lease dated
August 1, 1998, and as amended March 24, 1999, covering the Premises known as
approximately 20,3000 square feet of warehouse space and 16,000 square feet of
space on C Facility for a total of 36,300 square feet located within the
boundaries of Chuckawalla Valley State Prison (CSVP), situated in the County of
Riverside, State of California.

         WHEREAS, the parties hereto desire to amend said agreement to (1)
reduce the square footage, (2) decrease the monthly rental rate, and (3) change
the address for notices to the LESSEE and Department of General Services.

         NOW, THEREFORE, it is mutually agreed between the parties hereto as
follows:

         1.       Paragraph 1, Description - Effective June 1, 2001, the square
footage is reduced and the paragraph is changed to read as follows:

              STATE does hereby lease to LESSEE, and LESSEE hereby hires from
         STATE approximately 9,280 square feet of warehouse space and
         approximately 16,000 square feet of space on C Facility for a total of
         25,280 square feet located within the boundaries of CVSP, situated in
         the County of Riverside, State of California, hereinafter called the
         Premises, as outlined in red on Exhibits "A," amended "B-1" and "B-2"
         incorporated herein and by this reference made a part hereof.

         2.       Paragraph 3, Rent - Effective June 1, 2001, the monthly rental
rate is reduced and shall be FIVE HUNDRED FIVE AND NO/100 DOLLARS ($505.00),
payable monthly in advance.

         3.       Paragraph 14, Notices - The address for the LESSEE and the
Department of General Services changed as follows:

         To the LESSEE:             Labor-To-Industry, Inc
                                    Rick Legge, President
                                    Suite #107
                                    780 Deltona Boulevard
                                    Deltona, Florida  32725

                                                                   Exhibit 10.7A
                                                                          Page 1
<PAGE>   2

         To the STATE:              Department of General Services
                                    Real Estate Services Division
                                    1102 Q Street, Suite 6000
                                    Sacramento, California  95814

         4.       Except as expressly amended herein, all of the terms and
conditions of said Lease shall remain unchanged and in full force and effect.

         IN WITNESS WHEREOF, this Amendment No. 2 to Lease has been executed by
the parties on the date written below.

                               STATE OF CALIFORNIA
                               DEPARTMENT OF GENERAL SERVICES
                               REAL ESTATE SERVICES DIVISION

                               By:    /s/ Cheryl L. Allen
                                  ---------------------------------------------
                                     CHERYL L. ALLEN, Manager
                                     State Owned Leasing & Development

                               EXECUTED DATE:     6/18/2001
                                             ----------------------------------

                               LESSEE:

                               LABOR-TO-INDUSTRY, INC.

                               By:    /s/ Rick Legge
                                  ---------------------------------------------
                                     RICK LEGGE, President
APPROVED:

DEPARTMENT OF CORRECTIONS

By:    /s/ Judy Buckman
   -----------------------------
      JUDY BUCKMAN, Chief
      Business Management Branch

CHUCKAWALLA VALLEY STATE PRISON

By:    /s/ D.K. Butler
   ------------------------------
      D.K. BUTLER, Warden

                                                                   Exhibit 10.7A
                                                                          Page 2<PAGE>   1
                                                                   EXHIBIT 10.15

                                VOTING AGREEMENT

         VOTING AGREEMENT (this "AGREEMENT"), dated as of February 28, 2001, by
and between Yazam.com Inc., a Delaware corporation ("YAZAM"), and Gregory Earls,
an individual (the "STOCKHOLDER").

         WHEREAS, Yazam has entered into an Agreement and Plan of Merger as of
the date hereof (the "MERGER AGREEMENT") with U.S. Technologies Inc., a Delaware
corporation ("USXX") and U.S. Technologies Acquisition Co., a Delaware
corporation and wholly owned subsidiary of USXX ("NEWCO"), pursuant to which
Newco will merge with and into Yazam with Yazam surviving the merger (the
"MERGER");

         WHEREAS, pursuant to the Merger, certain stockholders of Yazam will
receive shares of convertible preferred stock, par value $0.02 per share, of
USXX (the "PREFERRED STOCK"), as more fully described in the Merger Agreement;

         WHEREAS, USXX intends to amend its certificate of incorporation (the
"CHARTER AMENDMENT") to increase the authorized number of its Common Stock, par
value $0.02 per share (the "COMMON STOCK"), in order to authorize and reserve a
sufficient number of the Common Stock for the conversion of the Preferred Stock;

         WHEREAS, the Stockholder is the largest single stockholder of USXX and
controls the voting power of the number of shares of capital stock of USXX
required to approve the Charter Amendment in accordance with the provisions of
the Delaware General Corporation Law (the "DGCL"); and

         WHEREAS, in consideration of Yazam entering into the Merger Agreement,
the Stockholder has agreed to enter into this Agreement to vote his Shares (as
defined herein), in favor of the Charter Amendment.

         NOW, THEREFORE, in consideration of the foregoing and the mutual
representations, warranties, covenants and agreements contained herein, for
other good and valuable consideration, the sufficiency of which is hereby
acknowledged, and intending to be legally bound, and upon the terms and subject
to the conditions hereinafter set forth, the parties hereby agree as follows.

         1.       Definitions. For purposes of this Agreement:

         "PERSON" shall mean an individual, corporation, association,
partnership, limited liability Company, joint venture, organization, business,
trust or any other entity or organization, including a government or any
subdivision or agency thereof.

         "PERMITTED TRANSFEREE" shall mean any person who is (A) the spouse or
former spouse of, or any lineal descendent of, or any spouse of such lineal
descendent of, or the grandparent, parent, brother or sister of, or spouse of
such brother or sister of, either the Stockholder or of a Permitted Transferee;
(B) upon the death of the Stockholder or any Permitted Transferee of the
Stockholder, the executors of the estate of the Stockholder or such Permitted
Transferee, and any of the Stockholder's or such Permitted Transferee's heirs,
testamentary trustees, devisees or legatees; (C) any trust for the benefit of
the Stockholder or any Permitted Transferees; (D) upon the disability of either
the Stockholder or such Permitted Transferee, any guardian or conservator of the
Stockholder or such Permitted Transferee; provided, however, that in each case
such transferee assumes and agrees to perform and becomes a party to

                                                                   Exhibit 10.15
                                                                          Page 1
<PAGE>   2
this Agreement. For purposes of this Agreement, when a Permitted Transferee has
acquired Shares in accordance herewith, such person shall be deemed a
"Stockholder" hereunder.

         "SHARES" shall mean the shares of capital stock of USXX and any right
to acquire shares of capital stock of USXX owned by the Stockholder as of the
date hereof and any shares of capital stock of USXX or rights to acquire shares
of capital stock of USXX acquired by the Stockholder in any capacity after the
date hereof and prior to the termination of this Agreement. In the event of a
stock dividend or distribution, or any change in the capital stock of USXX by
reason of any stock dividend, split-up, recapitalization, reclassification,
combination, exchange of shares or the like, the term "Shares" shall be deemed
to refer to and include the Shares as well as all such stock dividends and
distributions and any shares into which or for which any or all of the Shares
may be changed, reclassified or exchanged, and appropriate adjustments shall be
made to the terms and provisions of this Agreement.

         2.       Agreements.

                  (a)      Voting Agreement. Subject to Section 4 below, the
Stockholder hereby irrevocably and unconditionally agrees to vote all of the
Shares owned or controlled by him at the time of the relevant stockholder vote
(or action by written consent) in any circumstances upon which his vote, consent
or other approval is sought in favor of the Charter Amendment. The Stockholder
represents that he owns or controls the voting rights with respect to a
sufficient number of Shares necessary to approve the Charter Amendment in
accordance with the DGCL and any other applicable laws.

                  (b)      No Inconsistent Arrangements. The Stockholder hereby
covenants and agrees that with respect to the Shares owned or controlled by him,
he shall not (i) transfer (which term shall include, without limitation, any
sale, gift, pledge or other disposition), or consent to any transfer of, any or
all of the Shares to any Person who is not a Permitted Transferee (a "PROHIBITED
TRANSFER"), (ii) enter into any contract, option or other agreement or
understanding with respect to any Prohibited Transfer of any Shares, or any
interest therein, (iii) deposit any Shares into a voting trust, grant any proxy,
power-of-attorney or other authorization in or with respect to any Shares to any
Person other than the Permitted Transferee, (iv) except for this Agreement or as
permitted herein, enter into a voting agreement or arrangement with respect to
any Shares, or (v) take any other action that would in any way restrict, limit
or interfere with the performance of his obligations hereunder.

                  (c)      Actions as Director. Subject to the fiduciary duties
as a director of USXX, the Stockholder agrees to recommend to the board of
directors of USXX to approve and adopt the Charter Amendment, to vote in favor
of the Charter Amendment as a director, to recommend the approval and adoption
of the Charter Amendment to the stockholders of USXX and to use his best efforts
to cause the Charter Amendment to be approved by the stockholders of USXX no
later than [June 1, 2001].

         3.       Representations and Warranties. (a) The Stockholder hereby
represents and warrants to Yazam as follows:

                  (i)      Ownership of Securities. As of the date hereof, the
         Stockholder beneficially owns approximately 59,008,818 Shares and holds
         proxies or other rights to vote an additional approximately 56,055,000
         Shares, the aggregate of which constitutes 71% of the outstanding
         capital stock of USXX as of the date hereof (the "CONTROLLED SHARES").
         The Stockholder has sole voting power for all of the Controlled Shares
         with no contractual or ownership limitations, qualifications or
         restrictions on such rights that would interfere with the Stockholder's
         ability to perform his commitments herein, subject to applicable
         securities laws and the terms of this Agreement.

                                                                   Exhibit 10.15
                                                                          Page 2
<PAGE>   3

                  (ii)     Power; Binding Agreement. The Stockholder has the
         requisite power and authority to enter into and perform all of his
         obligations under this Agreement. This Agreement has been duly and
         validly executed and delivered by the Stockholder and constitutes a
         valid and binding agreement of the Stockholder, enforceable against the
         Stockholder in accordance with its terms.

         4.       Termination. This Agreement and the covenants, representations
and warranties and agreements contained herein or granted pursuant hereto shall
terminate upon the earlier of the Merger or termination of the Merger Agreement.

         5.       Miscellaneous.

                  (a)      Specific Performance. The Stockholder recognizes and
agrees that if, for any reason, any of the provisions of this Agreement are not
performed by him in accordance with its specific terms or are otherwise
breached, immediate and irreparable harm or injury would be caused to Yazam for
which money damages would not be an adequate remedy. Accordingly, the
Stockholder agrees that, in addition to any other available remedies, Yazam
shall be entitled to an injunction restraining any violation or threatened
violation of the provisions of this Agreement without the necessity of Yazam
posting a bond or other form of security. In the event that any action should be
brought in equity to enforce the provisions of this Agreement, the Stockholder
will not allege, and hereby waives the defense, that there is an adequate remedy
at law.

                  (b)      Severability. Any term or provision of this Agreement
which is invalid or unenforceable in any jurisdiction shall, as to that
jurisdiction, be ineffective to the extent of such invalidity or
unenforceability without rendering invalid or unenforceable the remaining terms
and provisions of this Agreement or affecting the validity or enforceability of
any of the terms or provisions of this Agreement in any other jurisdiction.
Without limiting the foregoing, with respect to any provision of this Agreement,
if it is determined by a court of competent jurisdiction to be excessive as to
duration or scope, it is the parties' intention that such provision nevertheless
be enforced to the fullest extent that it may be enforced.

                  (c)      GOVERNING LAW. THIS AGREEMENT AND ALL DISPUTES,
CONTROVERSIES OR CLAIMS ARISING OUT OF OR RELATING TO THIS AGREEMENT OR A BREACH
THEREOF SHALL BE GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.

                  (d)      Entire Agreement. This Agreement constitutes the
entire agreement among the parties hereto with respect to the subject matter
hereof and supersedes all written and oral prior agreements and understandings,
and all contemporaneous oral agreements and understandings, among the parties or
any of them with respect to the subject matter hereof.

                  (e)      Amendment, Modification and Waiver. This Agreement
may not be amended, modified or waived except by an instrument or instruments in
writing signed by both parties hereto.

                  (f)      Counterparts. This Agreement may be executed in two
or more counterparts, each of which shall be deemed to be an original, but all
of which shall constitute one and the same agreement.

         IN WITNESS WHEREOF, the parties have caused this Agreement to be duly
executed as of the day and year first above written.

                                      YAZAM.COM INC.

                                      By:   /s/ Bernie Siegel
                                          -------------------------------------
                                            Name:  Bernie Siegel
                                            Title:

                                      C. GREGORY EARLS

                                        /s/ Gregory Earls
                                      -----------------------------------------

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