Document:

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                                 EXHIBIT 10.13
                      FORM OF EMPLOYEE WARRANT AGREEMENT

                            U.S. LABORATORIES INC.
                            STOCK WARRANT AGREEMENT
                            -----------------------

     THIS AGREEMENT made and entered into as of ______ (the "Grant Date"), by
and between U.S. Laboratories Inc., a Delaware corporation (the "Company"), and
____________ (the "Holder").

                                   RECITALS
                                   --------

     WHEREAS, the Board of Directors of the Company (the "Board") approved the
grant of a warrant to purchase shares of the Company's common stock, par value
$.01 per share ("Stock"), to the Holder; and

     WHEREAS, this Agreement is intended to memorialize the terms and conditions
of such grant.

                                   AGREEMENT
                                   ---------

     NOW, THEREFORE, in consideration of the covenants and agreements herein set
forth, the parties hereby mutually covenant and agree as follows:

     1.   Grant. The Company hereby grants to Holder a warrant to purchase from
          -----
the Company all or any part of an aggregate number of _____ shares of Stock
(hereinafter such shares of Stock are referred to as the "Warrant Shares" and
the warrant to purchase the Warrant Shares is referred to as the "Warrant").

     2.   Price. The price to be paid for the Warrant Shares shall be ___
          -----
dollars ($____) per share.

     3.   Term; Exercise.
          --------------

          (a)  This Warrant may be exercised by the Holder hereof in whole or in
     part, from time to time, beginning on the earlier to occur of:

               (i)  the date on which the closing price of a share of Stock as
          reported on the Nasdaq Small-Cap Market is greater than $12.00, or

               (ii) the date on which the audited financial statements of the
          Company for its fiscal year ending December 31, 1998 (including on a
          consolidated basis the earnings on Wyman Testing Laboratories, Inc.
          ("Wyman")), or any fiscal year thereafter during the term of the
          Warrant, reflect that the Company's earnings per share of Stock for
          the fiscal year are at least twice the award of the "base period
          earnings." The "base period earnings"
<PAGE>

          shall mean $841,041, which represents the combined earnings of the
                     --------
          Company and Wyman as reported in the audited financial statements of
          the Company for the fiscal year ending December 31, 1997.

          (b)  This Warrant will expire and will not be exercisable after the
     earlier to occur of:

               (i)   thirty (30) days after the Holder's termination of
          employment for any reason other than death, disability or cause (as
          defined below);

               (ii)  ninety (90) days after the Holder's termination of
          employment as a result of death or disability (as defined in Section
          22(e)(3) of the Code);

               (iii) the Holder's termination of employment for cause (as
          defined below); or

               (iv)  November 1, 2001;

provided, however, that if the Warrant is not exercisable pursuant to paragraph
3(a) hereof as of the date of the Participant's termination of employment with
the Company or its subsidiaries for any reason, the Warrant shall be immediately
terminated and automatically cancelled as of such date of termination.

As used herein, "cause" shall mean (i) conviction of a felony, (ii) commission
by the Participant of an act of fraud, misappropriation or embezzlement or (iii)
any other act or omission to act by the Participant if, in the judgment of the
Committee (A) the Participant knew or should have known that such an act or
omission would cause material injury to the financial condition or reputation of
the Company or its subsidiaries, and (B) such material injury has occurred or is
likely to occur, all as determined by the Committee.

     4.   Method of Exercise. The Warrant may be exercised only by written
          ------------------
notice, delivered or mailed by postpaid registered or certified mail, addressed
to the treasurer of the Company at the Company's principal executive offices
specifying the number of Warranted Shares being purchased. Such notice shall be
accompanied by payment of the entire price of the Warrant Shares being purchased
(i) in cash or its equivalent, (ii) with the consent of the Board, by tendering
previously acquired shares of Stock having a fair market value (as determined by
the Board) equal to the price of the Warrant Shares being purchased, or (iii)
with the consent of the Board, by a combination of (i) and (ii). On and after
the effective date of an IPO (as defined below) of the Stock, the Warrant may be
exercised in the manner previously described or by delivery to the Company or
its designated agent of an executed irrevocable exercise form together with
instructions to a broker-dealer to sell or margin a sufficient portion of the
shares being exercised and deliver the sale or margin proceeds directly to the
Company to pay for price for the Warrant Shares. As used herein, "IPO" means the
event that occurs when shares of Stock are sold to the public pursuant to an
effective registration statement, other than a registration statement on
Form S-4 or Form S-8 or any other forms primarily used to register securities to
be issued pursuant to Company benefit

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plans, filed by the Company under the Securities Act of 1933 (the "Securities
Act"). Upon receipt of the payment of the entire price of the Warrant Shares so
purchased, certificates for such Warrant Shares shall be issued to the Holder.
The Warrant Shares so purchased shall be fully paid and nonassessable.

     5.   No Rights as a Shareholder. The Holder shall not be deemed for any
          --------------------------
purposes to be a shareholder of the Company with respect to any shares which may
be acquired hereunder except to the extent that the Warrant shall have been
exercised with respect thereto and a stock certificate issued therefor.

     6.   Nontransferabilitv; Collateral. Unless permitted by the Board, the
          ------------------------------
Warrant shall not be transferable by the Holder otherwise than by will or the
laws of descent and distribution, and may be exercised during the life of the
Holder only by the Holder. The Warrant may not be assigned, mortgaged or pledged
as any type of security or collateral.

     7.   Restrictions on Transfers of Stock. The shares to be acquired upon
          ----------------------------------
exercise of the Warrant may not be sold or offered for sale except (i) pursuant
to an effective registration statement under the Securities Act of 1933 (the
"Act") or any applicable state securities laws, (ii) in a transaction satisfying
the requirements of Rule 144 promulgated under the Act, or (iii) in a
transaction which, in the opinion of counsel for the Company, is exempt from the
registration provisions of the Act or applicable state securities laws. The
Holder agrees that any certificate representing shares acquired upon exercise of
the Warrant may bear the following legend:

          The shares of Common Stock represented by this certificate are
          restricted securities as that term is defined under Rule 144
          promulgated under the Securities Act of 1933, as amended (the "Act").
          These shares may not be sold, transferred or disposed of unless they
          are registered under the Act, sold in a transaction satisfying the
          requirements of Rule 144 or unless the request to transfer is
          accompanied by an opinion of counsel acceptable to the issuer, that
          the transfer will not result in a violation of the Act or any
          applicable state securities laws.

     8.   Specific Restrictions Upon Warrant Shares. The Holder hereby agrees
          -----------------------------------------
with the Company that the Holder shall acquire the Warrant Shares for investment
purposes only and not with a view to resale or other distribution thereof to the
public in violation of the Act, and shall not dispose of the Warrant Shares in
any transaction which, in the opinion of counsel to the Company, would violate
the Act, or the rules and regulations thereunder, or any applicable state
securities or blue sky laws.

     9.   Adjustments. If the Company shall at any time change the number of
          -----------
shares of its Stock without new consideration to the Company (such as by stock
dividend, stock split or similar transaction), the total number of shares then
remaining subject to purchase hereunder shall be changed in proportion to the
change in issued shares, and the Warrant price per share shall be adjusted so
that the total consideration payable to the Company upon the purchase of all
shares not theretofore purchased shall not be changed. In the event there shall
be any

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change, other than as specified above, in the number or kind of outstanding
shares of Stock or of any stock or other securities into which such Stock shall
have been changed or for which it shall have been exchanged, then if the Board
shall in its sole discretion determine that such change equitably requires an
adjustment in the number or kind of shares subject to the Warrant, such
adjustment shall be made by the Board. The Warrant price for each share of Stock
or other securities substituted or adjusted as provided in this paragraph shall
be determined by dividing the Warrant price for each share prior to such
substitution or adjustment by the number of shares or the fraction of a share
substituted for such share or to which such share shall have been adjusted. No
adjustment or substitution provided for in this paragraph shall require the
Company to sell a fractional share.

     10.  Tax Withholding. It shall be a condition of the obligation of the
          ---------------
Company to issue or transfer shares of Stock upon exercise of the Warrant, that
the Holder shall pay to the Company upon its demand, or agree that the Company
may withhold from compensation due the Holder, such amount as may be requested
by the Company for the purpose of satisfying its liability to withhold federal,
state or local income or other taxes incurred by reason of the exercise of the
Warrant. If the Holder fails to comply with this Paragraph 10, the Company may
refuse to issue or transfer shares of Stock upon exercise of the Warrant.

     11.  Powers of Company Not Affected. The existence of the Warrant herein
          ------------------------------
granted shall not affect in any way the right or power of the Company or its
shareholders to make or authorize any or all adjustments, recapitalizations,
reorganizations or other changes in the Company's capital structure or its
business, or any merger or consolidation of the Company, or any issuance of
bonds, debentures, preferred, or prior preference stock ahead of or affecting
the Stock or the rights thereof, or dissolution or liquidation of the Company,
or any sale or transfer of all or any part of its assets or business, or any
other corporate act or proceeding, whether of a similar character or otherwise.

     12.  Interpretation. As a condition of the granting of the Warrant, the
          --------------
Holder agrees for himself and his legal representatives, that any dispute or
disagreement which may arise under or as a result of or pursuant to this
Agreement shall be determined by the Board in its sole discretion, and any
interpretation by the Board of the terms of this Agreement shall be final,
binding and conclusive.

     13.  Amendment or Modification. No term or provision of this Agreement may
          -------------------------
be amended, modified or supplemented orally, but only by an instrument in
writing signed by the party against whom or which the enforcement of the
amendment, modification or supplement is sought.

     14.  Governing Law. This Agreement shall be governed by the internal laws
          -------------
of the State of Delaware as to all matters, including, but not limited to,
matters of validity, construction, effect, performance and remedies.

     15.  Entire Agreement. This Agreement entered into between the Holder and
          ----------------
the Company sets forth the entire agreement of the parties hereto in respect of
the subject matter contained herein and supersedes all prior agreements,
promises, covenants, arrangements,

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communications, representations or warranties, whether oral or written, by any
officer, employee or representative of any party hereto; and any prior agreement
of the parties hereto in respect of the subject matter contained herein is
hereby terminated and canceled.

     16.  Delegation by Board. Except to the extent prohibited by applicable
          -------------------
law or the applicable rules of a stock exchange or market, the Board may
delegate all or any portion of its responsibilities and powers to any one or
more of its members. Any such delegation may be revoked by the Board at any
time.

     17.  Heirs and Successors. This Agreement shall be binding upon, and inure
          --------------------
to the benefit of, the Company and its successors and assigns, and upon person
acquiring all or substantially all of the Company's assets and business. In the
event of the Holder's death prior to exercise of the warrant, the Warrant may be
exercised by the estate of the Holder to the extent such exercise is otherwise
permitted by this Agreement.

     IN WITNESS WHEREOF, the Company has caused this instrument to be executed
by its duly authorized officer and the Holder has executed this Agreement as of
the day and year first above written.

                              U.S. LABORATORIES INC.
                              (the "Company")

                              By:______________________________________
                                    Secretary / Treasurer

                              HOLDER:

                              _________________________________________

                                       5<PAGE>

                                 EXHIBIT 10.22
                     WARRANT AGREEMENT BETWEEN COMPANY AND
                          MILLER CAPITAL CORPORATION

The warrant represented by this certificate and the shares available upon
exercise hereof have not been registered under the Securities Act of 1933, as
amended, and may not be sold, pledged, or otherwise transferred unless (1)
covered by an effective registration statement under the Securities Act of 1933,
as amended, or (2) U. S. Laboratories Inc. has been furnished an opinion of
counsel acceptable to it to the effect that no registration is legally required
for such transfer.

Date of Issuance: March 15, 1999                             Warrant to Purchase
                                                                  120,000 Shares
                                                              of Common Stock as
                                                                Herein Described

                            U.S. LABORATORIES INC.

                         COMMON STOCK PURCHASE WARRANT

          THIS AGREEMENT is made as of March 15, 1999 (the "Grant Date"), by and
between U.S. Laboratories Inc., a Delaware corporation (the "Company"), and the
Miller Capital Corporation, an Arizona corporation (the "Holder").

                                   RECITALS
                                   --------

          WHEREAS, the Board of Directors of the Company (the "Board") approved
the grant of a warrant to purchase shares of the Company's common stock, par
value $.01 per share ("Stock"), to the Holder; and

          WHEREAS, the Company and Holder have entered into that Investor
Relations Agreement (the "Investor Relations Agreement") dated March 15, 1999;
and

          WHEREAS, this Agreement is intended to memorialize the terms and
conditions of such grant.

                                   AGREEMENT
                                   ---------

          NOW, THEREFORE, in consideration of the covenants and agreements
herein set forth, the parties hereby mutually covenant and agree as follows:
<PAGE>

          1.   Grant. The Company hereby grants to Holder a warrant to purchase
               -----
from the Company all or any part of an aggregate number of one hundred twenty
thousand (120,000) shares of Stock (hereinafter such shares of Stock are
referred to as the "Warrant Shares" and the warrant to purchase the Warrant
Shares is referred to as the "Warrant").

          2.   Price. The price to be paid for the Warrant Shares shall be
               -----
($3.875) per share.

          3.   Term; Exercise.
               --------------

          (a)  This Warrant may be exercised immediately by the Holder hereof in
     whole or in part, from time to time, as to seventy thousand (70,000)
     shares.

          (b)  This Warrant may be exercised by the Holder hereof in whole or in
     part, from time to time, as to fifty thousand (50,000) shares beginning on
     the earlier to occur of:

               i.  the date on which the closing price of a share of Stock as
          reported on the Nasdaq Small-Cap Market is at least $7.00 for three
          (3) consecutive trading days; or

               ii.  the date on which the Company determines, in its sole
          discretion, that the value of the services provided to the Company by
          the Miller Capital Corporation during the term of the Investor
          Relations Agreement is sufficient to justify the vesting.

          (c)  This Warrant will expire and will not be exercisable on the date
     five (5) years from the date of grant.

          4.   Method of Exercise. The Warrant may be exercised only by written
               ------------------
notice, delivered or mailed by postpaid registered or certified mail, addressed
to the treasurer of the Company at the Company's principal executive offices
specifying the number of Warranted Shares being purchased. The Such notice shall
be accompanied by payment of the entire price of the Warrant Shares being
purchased (i) in cash or its equivalent, (ii) by tendering previously acquired
shares of Stock having a fair market value (as determined by the Board) equal to
the price of the Warrant Shares being purchased, or (iii) by a combination of
(i) and (ii). The Warrant may be exercised in the manner previously described or
by delivery to the Company or its designated agent of an executed irrevocable
exercise form together with instructions to a broker-dealer to sell or margin a
sufficient portion of the shares being exercised and deliver the sale or margin
proceeds directly to the Company to pay for price for the Warrant Shares. Upon
receipt of the payment of the entire price of the Warrant Shares so purchased,
certificates for such Warrant Shares shall be issued to the Holder. The Warrant
Shares so purchased shall be fully paid and nonassessable.

          5.   No Rights as a Stockholder. The Holder shall not be deemed for
               --------------------------
any purposes to be a stockholder of the Company with respect to any shares which
may be acquired

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<PAGE>

hereunder except to the extent that the Warrant shall have been exercised with
respect thereto and a stock certificate issued therefor.

          6.   Transferability. The Warrant may be transferred by the Holder as
               ---------------
long as any transferee agrees to be bound by this Agreement.

          7.   Restrictions on Transfers of Stock. The shares to be acquired
               ----------------------------------
upon exercise of the Warrant may not be sold or offered for sale except (i)
pursuant to an effective registration statement under the Securities Act of 1933
(the "Act") or any applicable state securities laws, (ii) in a transaction
satisfying the requirements of Rule 144 promulgated under the Act, or (iii) in a
transaction which, in the opinion of counsel for the Company, is exempt from the
registration provisions of the Act or applicable state securities laws. Any
certificate representing shares acquired upon exercise of the Warrant may bear
the following legend:

               The shares of Common Stock represented by this
          certificate are restricted securities as that term is
          defined under Rule 144 promulgated under the Securities
          Act of 1933, as amended (the "Act"). These shares may
          not be sold, transferred or disposed of unless they are
          registered under the Act, sold in a transaction
          satisfying the requirements of Rule 144 or unless the
          request to transfer is accompanied by an opinion of
          counsel acceptable to the issuer, that the transfer
          will not result in a violation of the Act or any
          applicable state securities laws.

          8.   Specific Restrictions Upon Warrant Shares. The Holder shall
               -----------------------------------------
acquire the Warrant Shares for investment purposes only and not with a view to
resale or other distribution thereof to the public in violation of the Act, and
shall not dispose of the Warrant Shares in any transaction which, in the opinion
of counsel to the Company, would violate the Act, or the rules and regulations
thereunder, or any applicable state securities or blue sky laws.

          9.   Adjustments.  If the Company changes the number of shares of its
               -----------
Stock without new consideration to the Company (such as by stock dividend, stock
split or similar transaction), the total number of shares then remaining subject
to purchase hereunder shall be changed in proportion to the change in issued
shares, and the Warrant price per share shall be adjusted so that the total
consideration payable to the Company upon the purchase of all shares not
theretofore purchased shall not be changed. If there is any change, other than
as specified above, in the number or kind of outstanding shares of Stock or of
any stock or other securities into which such Stock shall have been changed or
for which it shall have been exchanged, then if the Board in its sole discretion
determines that such change equitably requires an adjustment in the number or
kind of shares subject to the Warrant, such adjustment shall be made by the
Board. The Warrant price for each share of Stock or other securities substituted
or adjusted as provided in this paragraph shall be determined by dividing the
Warrant price for each share prior to such substitution or adjustment by the
number of shares or the fraction of a share substituted for such share or to
which such share shall have been adjusted. No adjustment or substitution
provided for in this paragraph shall require the Company to sell a fractional
share.

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<PAGE>

          10.  Investment Representations. Holder understands that the Warrants
               --------------------------
and the Warrant Shares have not been registered under the Act. Holder also
understands that the Warrant is being offered and sold pursuant to an exemption
from registration contained in the Securities Act based in part upon Holder's
representations contained in this Warrant. Holder hereby represents and warrants
as follows:

          (a)  Holder Bears Economic Risk. Holder has substantial experience in
     evaluating and investing in private placement transactions of securities in
     companies similar to the Company so that it is capable of evaluating the
     merits and risks of its investment in the Company and has the capacity to
     protect its own interests. Holder must bear the economic risk of this
     investment indefinitely unless the Warrant or the Warrant Shares, as
     applicable, are registered pursuant to the Securities Act, or an exemption
     from registration is available. Holder understands that the Company has no
     present intention of registering the Warrant, the Warrant Shares or any
     other shares of its Common Stock. Holder also understands that there is no
     assurance that any exemption from registration under the Securities Act
     will be available and that, even if available, such exemption may not allow
     Holder to transfer all or any portion of the Warrant or the Warrant Shares
     under the circumstances, in the amounts or at the times Holder might
     propose.

          (b)  Acquisition for Own Account. Holder is acquiring the Warrant, and
     will acquire the Warrant Shares if the Warrant is exercised, for Holder's
     own account for investment only, and not with a view towards their
     distribution.

          (c)  Holder Can Protect Its Interest. By reason of its, or of its
     management's, business or financial experiences, Holder has the capacity to
     protect its own interests in connection with the transactions contemplated
     in this Warrant. Further, Holder is aware of no publication of any
     advertisement in connection with the transactions contemplated in this
     Warrant.

          (d)  Accredited Investor. Holder represents that it is an accredited
     investor within the meaning of Regulation D under the Securities Act.

          (e)  Company Information. Holder has received and read the Company's
     financial statements and all documents that Holder considers material to
     its investment decision, and has had an opportunity to discuss the
     Company's business, management and financial affairs with directors,
     officers and management of the Company and has had the opportunity to
     review the Company's operations and facilities. Holder has also had the
     opportunity to ask questions of, and receive answers from, the Company and
     its management regarding the terms and conditions of this investment.

          (f)  Rule 144. Holder acknowledges that the Warrant and the Warrant
     Shares, as applicable, must be held indefinitely unless they are
     subsequently registered under the Securities Act or an exemption from such
     registration is available. Holder has been advised or is aware of the
     provisions of Rule 144 promulgated under the Securities Act, which permits
     limited resale of securities purchased in a private

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     placement subject to the satisfaction of certain conditions, including,
     among other things: the availability of certain current public information
     about the Company, the resale occurring not less than two years after a
     party has purchased and paid for the security to be sold, the sale being
     through an unsolicited "broker's transaction" or in transactions directly
     with a market maker (as said term is defined under the Securities Exchange
     Act of 1934, as amended) and the number of shares being sold during any
     three-month period not exceeding specified limitations.

          (g)  Residence. The office or offices of Holder in which its
     investment decision was made is located at the address of Holder set forth
     herein.

          11.  Registration Rights. The Company hereby grants to Holder
               -------------------
piggyback registration rights with respect to the Warrant Shares. If the Company
is filing a registration statement with the Securities and Exchange Commission
for itself or on behalf of any of its stockholders, the Company will notify
Holder in writing reasonably in advance of the filing (but at least five
business days) and give Holder the opportunity to include all or any party of
the Warrant Shares (whether or not previously issued, to the extent permissible
under the Act or any regulation promulgated thereunder). Upon Holder's
notification that Holder desires to have all or any portion of the Warrant
Shares included in the registration, the Company will, at no cost or expense to
the Holder, include or cause to be included in the registration statement the
Warrant Shares so identified by Holder. Notwithstanding any other provision of
this Section 11, in the case of an underwritten public offering, if the managing
underwriter determines that market factors require a limitation of the number of
shares to be underwritten, the managing underwriter may limit, or exclude
entirely, the number of shares (including those of Holder) to be included in the
piggyback registration. If limited, Holder's shares will be registered pro rata
with any other holders of common stock or common stock equivalents having
registration rights.

          12.  Tax Withholding. The Company may withhold such amount as may be
               ---------------
requested by the Company for the purpose of satisfying its liability to withhold
federal, state or local income or other taxes incurred by reason of the exercise
of the Warrant. If the Holder fails to comply with this Paragraph 10, the
Company may refuse to issue or transfer shares of Stock upon exercise of the
Warrant.

          13.  Powers of Company Not Affected. The existence of the Warrant
               ------------------------------
herein granted shall not affect in any way the right or power of the Company or
its stockholders to make or authorize any or all adjustments, recapitalizations,
reorganizations or other changes in the Company's capital structure or its
business, or any merger or consolidation of the Company, or any issuance of
bonds, debentures, preferred, or prior preference stock ahead of or affecting
the Stock or the rights thereof, or dissolution or liquidation of the Company,
or any sale or transfer of all or any part of its assets or business, or any
other corporate act or proceeding, whether of a similar character or otherwise.

          14.  Amendment or Modification. No term or provision of this
               -------------------------
Agreement may be amended, modified or supplemented orally, but only by an
instrument in writing signed

                                       5
<PAGE>

by the party against whom or which the enforcement of the amendment,
modification or supplement is sought.

          15.  Governing Law. This Agreement is governed by the internal laws
               -------------
of the State of Delaware as to all matters, including, but not limited to,
matters of validity, construction, effect, performance and remedies.

          16.  Entire Agreement. This Agreement entered into between the Holder
               ----------------
and the Company sets forth the entire agreement of the parties hereto in respect
of the subject matter contained herein and supersedes all prior agreements,
promises, covenants, arrangements, communications, representations or
warranties, whether oral or written, by any officer, employee or representative
of any party hereto; and any prior agreement of the parties hereto in respect of
the subject matter contained herein is hereby terminated and canceled.

          17.  Delegation by Board. Except to the extent prohibited by
               -------------------
applicable law or the applicable rules of a stock exchange or market, the Board
may delegate all or any portion of its responsibilities and powers to any one or
more of its members. Any such delegation may be revoked by the Board at any
time.

          18.  Heirs and Successors. This Agreement is binding upon, and inures
               --------------------
to the benefit of, the Company and its successors and assigns, and upon any
person acquiring all or substantially all of the Company's assets and business.
If the Holder is an individual who dies prior to exercise of the Warrant, the
Warrant may be exercised by the estate of the Holder if such exercise is
otherwise permitted by this Agreement.

          IN WITNESS WHEREOF, the Company has caused this instrument to be
executed by its duly authorized officer and the Holder has executed this
Agreement as of the day and year first above written.

                                        U.S. LABORATORIES INC.
                                        (the "Company")

                                        By: _________________________________

                                        HOLDER:

                                        By: _________________________________

                                       6

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