Document:

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                                                                     EXHIBIT 4.2

                                Chase Corporation
                  2001 Non-Employee Director Stock Option Plan

     This 2001 Non-Employee Director Stock Option Plan (the "Plan") provides for
ownership of Common Stock, $.10 par value (the "Stock") of Chase Corporation
(the "Company") by non-employee directors so as to provide additional incentives
to promote the success of the Company through the grant of Nonstatutory Stock
Options ("Options").

     1. Administration of the Plan.

     The administration of the Plan shall be under the general supervision of
the Board of Directors of the Company (the "Board"). Within the limits of the
Plan, the Directors shall determine the individuals to whom, and the times at
which, Options will be granted, the duration of each Option, the price and
method of payment for each Option, and the time or times within which (during
its term) all or portions of each Option may be exercised. The Board may
establish such rules as it deems necessary for the proper administration of the
Plan, make such determinations and interpretations with respect to the Plan and
Options granted under it as may be necessary or desirable and include such
further provisions or conditions in Options granted under the Plan as it deems
advisable.

     2. Shares Subject to the Plan.

     (a) Number and Type of Shares. The aggregate number of shares of Stock of
the Company that may be optioned under the Plan is 90,000 shares. In the event
that the Board in its discretion determines that any stock dividend, split-up,
combination or reclassification of shares, recapitalization or other similar
capital change affects the Stock such that adjustment is required in order to
preserve benefits of the Plan or any Option granted under the Plan, the maximum
aggregate and kind of shares or securities of the Company as to which Options
may be granted under the Plan and as to which Options then outstanding shall be
exercisable, and the option price of such Options, shall be appropriately
adjusted by the Board (whose determination shall be conclusive) so that the
proportionate number of shares or other securities as to which Options may be
granted and the proportionate interest of holders of outstanding Options shall
be maintained as before the occurrence of such event.

     (b) Effect of Certain Transactions. In the event of a consolidation or
merger of the Company with another corporation, or the sale or exchange of all
or substantially all of the assets of the Company, or a reorganization or
liquidation of the Company, each holder of an outstanding Option shall be
entitled to receive upon exercise and payment in accordance with the terms of
the Option the same shares as he would have been entitled to receive upon the
occurrence of such event had he exercised the Option immediately prior to such
event; provided, however, that in lieu of the foregoing the Board of Directors
of the Company may upon written notice to each holder provide that such Option
shall terminate on a date not less than 20 days

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after the date of such notice unless theretofore exercised. In addition, prior
to or after such an event, the Board may accelerate awards and waive conditions
and restrictions on any award to the extent it may determine appropriate.

     (c) Reservation of Shares. The Company shall at all times while the Plan is
in force reserve such number of shares of Stock as will be sufficient to satisfy
the requirements of the Plan. Shares issued under the Plan may consist of
authorized but unissued shares or treasury shares.

     3. Grant of Options: Eligible Persons.

     (a) Types of Options. Options shall be granted under the Plan as Options
which do not meet the requirements of Section 422 ("Nonstatutory Stock
Options"). Options may be granted by the Directors, within the limits set forth
in Sections 1 and 2 of the Plan, to all non-employee Directors of the Company.

     (b) Date of Grant. The date of grant for each Option shall be the date on
which it is approved, or such later date as the Directors may specify. No
options shall be granted hereunder after ten years from the date on which the
Plan was approved by the Board.

     4. Form of Options.

     Options granted hereunder shall be evidenced by a writing delivered to the
optionee specifying the terms and conditions thereof and containing such other
terms and conditions not inconsistent with the provisions of the Plan as the
Board considers necessary or advisable to achieve the purposes of the Plan or
comply with applicable tax and regulatory laws and accounting principles. The
form of such Options may vary among optionees.

     5. Option Price.

     The price at which shares may from time to time be optioned shall be
determined by the Board, provided that such price shall not be less that the
fair market value of the Stock on the date of granting as determined in good
faith by the Board.

     The Board may in its discretion permit the option price to be paid in whole
or in part by a note or in installments or with shares of Stock or such other
lawful consideration as the Board may determine.

     6. Term of Option and Dates of Exercise.

     (a) Exercisability. The Board shall determine the term of all Options, the
time or times that Options are exercisable and whether they are exercisable in
installments; provided, however, that the term of stock option granted under the
Plan shall not exceed a period of ten years from the date of its grant. In the
absence of such determination, the Option shall be exercisable at any time or
from time to time, in whole or in part, during a period of ten years from the
date of its grant.

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     (b) Effect of Disability, Death or Termination of Employment. The Board
shall determine the effect on an Option of the disability, death, retirement or
other termination as a member of the Board of an optionee and during the period
which, the optionee's estate, legal representative, on death may exercise rights
thereunder. Any beneficiary on death shall be designated by the optionee, in the
manner determined by the Board, to exercise the rights of the optionee in the
case of the optionee's death.

     (c) Other Conditions. The Board may impose such other conditions with
respect to the exercise of Options, including conditions relating to applicable
federal or state securities laws, as it considers necessary or advisable.

     (d) Amendment of Options. The Board may amend, modify or terminate any
outstanding Option, including substituting therefore another Option of the same
or different type, changing the date of exercise or realization, provided that
the optionee's consent to such action shall be required unless the Board
determines that the action, taking into account any related action, would not
materially and adversely affect the optionee, and provided further that,
notwithstanding the foregoing, the Board may not either amend any outstanding
Option to reduce the exercise price thereof or terminate an Option and
substitute therefor another Option having a lower per share exercise price.

     7. Non-transferability.

     No Option shall be transferable by the holder thereof other than by will or
the laws of decent and distribution, and shall be exercisable during the
holder's lifetime, only by the holder thereof; provided, however, that the Board
may provide that an Option is transferable by the holder thereof and exercisable
by persons other than the holder thereof upon such terms and conditions as the
Board shall determine.

     8. No Rights as a Shareholder.

     Subject to the provisions of the applicable Option, no optionee or any
person claiming through an optionee shall have any rights as a shareholder with
respect to any shares of stock to be distributed under the Plan until he or she
becomes the holder thereof.

     9. Amendment or Termination.

     The Board may amend or terminate the Plan at any time.

     10. Stockholder Approval.

     The Plan is subject to approval by the stockholders of the Company by the
affirmative vote of the holders of a majority of the shares of capital stock of
the Company entitled to vote thereon and present or represented at a meeting
duly held in accordance with the laws of the Commonwealth of Massachusetts, or
by any other action that would be given the same effect under the laws of such
jurisdiction, which action in either case shall be taken within twelve (12)
months from the date the Plan was adopted by the Board. In the event such
approval is not obtained, all Options granted under the Plan shall be void and
without effect.

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     11. Governing Law.

     The provisions of the Plan shall be governed by and interpreted in
accordance with the laws of the Commonwealth of Massachusetts.

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                                                                    EXHIBIT 10.8

                           PURCHASE AND SALE AGREEMENT

This agreement is made between the parties as of the 7th day of June, 2002.

1.   PARTIES

1.1  Pivotal Self-Service Technologies Inc. a Delaware corporation (the
      "Purchaser").

1.2  Prime Wireless Inc.(the "Corporation");

1.3  1500450 Ontario Limited, an Ontario corporation (the "Vendor").

2.   RECITALS

2.1  This agreement sets out the terms and conditions by which the Purchaser
     agrees to purchase and the Vendor agrees to sell all of the issued and
     outstanding shares of the Corporation (the "Shares"), all the intellectual
     property rights to operate the business of the Corporation, the name "Prime
     Wireless Inc.", Midland assets (collectively the "Shares and Intellectual
     Property Rights").

3.   PURCHASE AND SALE OF SHARES AND INTELLECTUAL PROPERTY RIGHTS

3.1  The Purchaser agrees to purchase the Shares and Intellectual Property
     Rights from the Vendor and to tender in full satisfaction of the purchase
     price, the following (the "Payment"):

          (d)  $40,000 US in cash or certified cheque

          (e)  $120,000 non-interest bearing note payable. Payable $2,000 US per
               month commencing July 1, 2002 for a period of 5 years, such
               payments contingent upon revenue and the continued distribution
               agreement between the Corporation and Vertex Standard.

          (f)  Fifty percent (50%) of all net proceeds from the sale of any
               Midland related asset payable 30 days after receipt of funds.

3.2  The Vendor agrees to sell to the Purchaser the Shares and Intellectual
     Property Rights and to accept the Payments in full satisfaction of the
     purchase price.

3.3  Each party agrees to cooperate with the other party to provide access to
     all information reasonably requested by another party to verify the
     truthfulness of the representations and warranties contained herein or in
     any other collateral document.

3.4  The effective date of closing of the purchase and sale contemplated herein
     shall be June 1, 2002, formal closing shall be June 7, 2002. Upon the
     closing, the transfer of Shares shall be effective from and after the
     effective date of closing.

3.5 The obligation of the Vendor to complete this agreement is subject only to
    the following:

          (1)  The representations and warranties of the Purchaser shall be true
               in all material respects now and on the Closing Date;

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4.   REPRESENTATIONS AND WARRANTIES

4.1  The Vendor and the Corporation represent and warrant as of the date of
     execution of this agreement, and as of the Closing Date, as follows:

(1)  The Corporation is duly incorporated and validly subsisting under the laws
     of the Province of Ontario.

(2)  The Corporation has full, right, power and capacity to enter into this
     agreement and perform the obligations of the Corporation contained herein.

(3)  The execution and delivery of this agreement and the consummation of the
     transactions contemplated hereby, have been duly authorized, executed, and
     delivered by proper corporate action of the Vendor and the Corporation.

(4)  This agreement is valid and binding as against the Vendor and the
     Corporation, enforceable against such parties in accordance with its terms,
     except as the enforceability thereof may be limited by applicable
     bankruptcy, insolvency, moratorium, reorganization or other laws of general
     application affecting enforcement of creditors rights or by general
     principles of equity.

(5)  The execution, delivery, or performance by the Vendor and the Corporation
     of this agreement, or compliance with the terms and provisions of this
     agreement, or the consummation of the transactions contemplated by this
     agreement will not:

     (a)  to the best of the knowledge of the Vendor and the Corporation,
          without investigation, contravene any applicable law, statute, rule,
          regulation, order, writ, injunction or decree of any Federal, state,
          provincial or local government, court or governmental department,
          commission, board, bureau, agency or instrumentality;

     (b)  conflict or be inconsistent with, or result in any breach of any of
          the terms, covenants, conditions or provisions of, or constitute a
          default (either immediately or with notice or the passage of time or
          both) under any indenture, mortgage, deed of trust, credit agreement
          or instrument or any other material agreement or instrument to which
          any of the Vendor or the Corporation is a party or by which it may be
          bound or to which any of the foregoing may be subject; or

     (c)  violate any provisions of the charter documents or bylaws or other
          constituting documents of any of the Vendor or the Corporation.

          The Vendor is the legal and beneficial owner of all of the Shares
          and Intellectual Property Rights free of encumbrances.

1.   REPRESENTATIONS AND WARRANTIES OF THE PURCHASER

4.2  The Purchaser represents and warrants as of the date of execution of this
     agreement, and as of the Closing Date, as follows:

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     (1)  The Purchaser is duly incorporated and validly subsisting under the
          state of Delaware.

     (2)  The execution and delivery of this agreement and the consummation of
          the transactions contemplated hereby, have been duly authorized,
          executed, and delivered by proper corporate action.

     (3)  The Purchaser has full, right, power and capacity to enter into this
          agreement and perform the obligations of the Purchaser contained
          herein.

     (4)  This agreement is valid and binding as against the Purchaser,
          enforceable against the Purchaser in accordance with its terms, except
          as the enforceability thereof may be limited by applicable bankruptcy,
          insolvency, moratorium, reorganization or other laws of general
          application affecting enforcement of creditors rights or by general
          principles of equity.

     (5)  All consents, approvals, qualifications, orders and authorizations of,
          or filings with all local, state and federal governmental authorities
          required on the part of the Purchaser in connection with the
          Purchaser's valid execution, delivery or performance of this
          agreement, the offer, sale, issuance or delivery of common shares of
          the Purchaser, or the performance by the Purchaser of its obligations
          in respect thereof have been obtained and all required filings have
          been made or will be made on a timely basis.

5.   GENERAL

5.1  This Agreement is binding on the parties, and together with the documents
     contemplated herein constitutes the whole and complete statement of
     agreement between the parties as to the subject matter hereof.

5.2  Each of the parties hereto agrees to do such further acts and execute such
     further documents as may be necessary or appropriate to give effect to the
     terms of this Agreement both before and after the closing.

5.3  The parties attorn to the non-exclusive jurisdiction of the courts of the
     Province of Ontario. The laws of the Province of Ontario shall govern the
     validity and interpretation of this agreement.

5.4  Each of the parties hereto individually represents and warrants that it has
     the right, power and capacity to enter into and perform its obligations as
     set out herein.

     Addresses for service of notice:

     The Corporation address:

     1500450 Ontario Limited
     119 Alexis Boulevard
     North York, ON M3H 2P8

     Pivotal Self-Service Technologies, Inc.
     13980 Jane Street
     King City, ON L7B 1A3

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5.5  This agreement is not assignable by the Vendor or the Purchaser, without
     the written permission of the other.

5.6  The parties confirm that there have been no brokers or finders in
     connection with the transactions contemplated herein, and each party agrees
     to indemnify the other against any brokers' or finders' fees or commissions
     or other compensation sought by persons purporting to have acted as agent
     or finder for such party in connection with the transactions contemplated
     herein.

5.7  Each party is responsible for his or her or its own expenses, including
     professional fees and disbursements and applicable taxes, in connection
     with the negotiation, drafting, execution and delivery of this agreement,
     and the conduct of any due diligence sought to be conducted by such party,
     except as otherwise expressly provided to the contrary.

                  IN WITNESS WHEREOF THE PARTIES HAVE CAUSED THESE PRESENTS TO
BE EXECUTED AS OF THE DAY AND YEAR FIRST ABOVE WRITTEN.

1500450 Ontario Limited

Per : _____________________________
Neil Greenberg
Director

Pivotal Self-Service Technologies, Inc.

Per : _____________________________
John G. Simmonds
Chairman

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