Document:

<PAGE>

                                                                    EXHIBIT 10.7
The Alberta Stock Exchange                                              Form 10A
--------------------------------------------------------------------------------

                                ESCROW AGREEMENT
                                 (Timed Release)

         THIS AGREEMENT made in triplicate, as of this 28th day of April, 1998.

AMONG:

                              INZECO HOLDINGS INC.
                          (herein called the "Issuer")

                                                               OF THE FIRST PART

                                     - and -

                        MONTREAL TRUST COMPANY OF CANADA
                          (herein called the "Trustee")

                                                              OF THE SECOND PART

                                     - and -

             ROGER J. SHORT, WILLIAM R. BEAVERS, GREENSULATE L.L.C.,
                SHEILA M. FINN, WARREN D. ARSENEAU, MICHAEL BOYD,
              JUNIOR INDUSTRIAL FINANCE CORP., ROBERT H. STIKEMAN,
          GUNDYCO IN TRUST FOR SHEILA FINN RRSP ACCOUNT #550-28824-17,
                T/D INVESTOR COMPANY IN TRUST FOR MIKE BOYD RRSP
              ACCOUNT #140422-S, RBC DOMINION IN TRUST FOR WILLIAM
                       BEAVERS RRSP ACCOUNT #49380616-1-3
                      (herein called the "Securityholders")

                                                               OF THE THIRD PART

         WHEREAS, in order to comply with the requirements of the Alberta
Securities Act, S.A. 1981, c.S-6.1 as amended. The Alberta Stock Exchange (the
"Exchange"), the Securityholders have agreed to deposit certain securities of
the Issuer owned or to be received by them into escrow in accordance with the
terms of this Escrow Agreement (the "Agreement");

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October 1997                                                               10A-1
<PAGE>

The Alberta Stock Exchange                                              Form 10A
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         AND WHEREAS, the Trustees has agreed to undertake and perform its
duties according to the terms and conditions of this Agreement;

         NOW, THEREFORE, this agreement witnesses that, in consideration of the
sum of One ($1.00) Dollar paid by the parties to each other, receipt of this
sum being acknowledged by each of the parties, the Securityholders jointly and
severally covenant and agree with the Issuer and with the Trustee, and the
Issuer and the Trustee covenant and agree each with the other and with the
Securityholders jointly and severally as follows:

1.       Each of the Securityholders hereby places and deposits in escrow
         with the Trustee those of the Securityholder's securities of the
         Issuer described in Schedule "A" (the "Escrowed Securities") and
         the Trustee hereby acknowledges receipt of such securities.  Each
         Securityholder further undertakes and agrees to deposit into
         escrow any further securities of the Issuer which the Security
         holder may receive as a stock dividend on the Escrowed Securities
         and to deliver to the Trustee immediately on receipt thereof the
         certificates (if any) for any such further securities and any
         replacement certificates which may at any time be issued for any
         of the Escrowed Securities.

2.       Each of the Securityholders shall be entitled to a letter or receipt
         from the Trustee stating the number of securities held for the
         Securityholder by the Trustee subject to the terms of this Agreement.
         It is expressly understood and agreed by the parties hereto that such
         letter or receipt shall not be assignable or transferrable.

3.       Each of the Securityholders hereby underakes and agrees to deposit in
         escrow with the Trustee any securities of the Issuer owned or acquired
         by the Securityholder in accordance with the escrow restrictions
         imposed by the Exchange.

4.       Except as provided in paragraph 6, the parties agree that the Escrowed
         Securities and the beneficial ownership of or interest in them and the
         certificates representing them (including any re placement
         certificates) shall remain in escrow and shall be released only on the
         written consent of the Exchange to the Trustee.

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October 1997                                                               10A-2

<PAGE>

The Alberta Stock Exchange                                              Form 10A
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5.       The parties direct the Trustee to retain their respective Escrowed
         Securities, the beneficial ownership in them and the certificates
         representing them (including any replacement securities or certi
         ficates) and not to do or cause anything to be done to release them
         from escrow or to allow any transfer, hypothecation or alienation
         thereof, except in accordance with paragraphs 6, 9 or 10 or on the
         written consent of the Exchange where required.

6.       The Escrowed Securities shall be released from escrow as to one
         third thereof on each of the first, second and third anniversaries
         of Completion of the Major Transaction. For greater certainty, the
         words "Completion of the Major Transaction", "Major Transaction",
         "Junior Capital Pool", or "JCP" shall have the same meaning as
         ascribed to them from time to time in Circular 7 and/or Alberta
         Securities Commission Rule 46-501.  To determine the date of
         Completion of the Major Transaction for the purposes of determin
         ing the release date of any Escrowed Securities, the Trustee may
         rely on the date specified in the Bulletin issued by the Exchange
         confirming that the Major Transaction has been completed and the
         Issuer is no longer considered a JCP.  The responsibility for the
         timely delivery to the Trustee of the Bulletin of The Alberta
         Stock Exchange lies with the Issuer and/or the Securityholders.

7.       Notwithstanding paragraph 6, if the Trustee receives written
         notification from the Exchange prohibiting further releases from
         escrow, the parties agree that the Trustee shall not permit any further
         releases of the Escrowed Securities unless and until the Trustees has
         received the written consent of the Exchange.

8.       The parties agree that a partial release of the Escrowed Securi
         ties shall release from escrow only the securities specified in
         it, and this Agreement shall continue in full force and effect in
         respect of those securities as may from time to time remain in
         escrow until all of the Escrowed Securities have been either
         released pursuant to paragraph 6 or on the written consent of the
         Exchange where required.  For greater certainty, this paragraph
         does not apply to securities transferred within escrow.

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October 1997                                                               10A-3

<PAGE>

The Alberta Stock Exchange                                              Form 10A
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9.       In the event of bankruptcy or death of a Securityholder, the Trustee,
         upon receipt of written notification by the Exchange, may transmit the
         Securityholder's securities by operation of law to the trustee in
         bankruptcy, personal representative or surviving joint tenant as the
         case may be but, notwithstanding such trans mission, the securities
         shall remain subject to the terms of this Agreement.

10.      The Exchange may consent in writing to the transfer within escrow
         or hypothecation within escrow of any of the Escrowed Securities,
         subject to an agreement in writing by the transferee or mortgagee
         to be bound by this Agreement and subject also to such other terms
         and conditions as the Exchange may impose, and the Trustee, on
         receipt of the written consent of the Exchange and of the agree
         ment of the transferee or mortgagee as described, shall permit
         such transfer within escrow or hypothecation within escrow.

11.      Any Securityholder applying to the Exchange for consent for any
         transfer of the Escrowed Securities within escrow shall, before
         applying, give reasonable notice in writing of his intention to do so
         both the Issuer and the Trustee. The Securityholders hereby acknowledge
         that any transferee of any of the Escrowed Securities which are subject
         to this Agreement shall be required to become bound by all of the
         provisions hereof.

12.      All voting rights attached to the Escrowed Securities shall at all
         times be exercised by the respective registered owners thereof.

13.      The Securityholders agree that, while any of their securities are held
         in escrow under this Agreement, they will not, without the prior
         written consent of the Exchange, vote any of their securi ties (whether
         escrowed or not) in support of any arrangement that would result in a
         repayment of capital being made on the Escrowed Securities prior to the
         commencement of any winding up of the Issuer.

14.      The Securityholders hereby renounce and release any right to receive
         payment of any dividend (other than a stock dividend) which may be
         payable on any Escrowed Securities with the intent that the dividend
         shall not be paid on securities which are in escrow on the record date
         set for the dividend.

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October 1997                                                               10A-4

<PAGE>

The Alberta Stock Exchange                                              Form 10A
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15.      If the Issuer is wound up and any securities remain in escrow
         under this Agreement at the time when assets of the Issuer are
         distributed to securityholders pursuant to the winding up, the
         Securityholders do hereby assign their right to receive that part
         of the distribution which is attributable to the Escrowed Securi
         ties to the Trustee, for the benefit of, and in trust for the
         persons and companies who are then securityholders of the Issuer
         whose securities are not subject to this Agreement, rateably in
         proportion of their holdings.

16.      The Trustees hereby accepts the responsibilities placed upon it by this
         Agreement and agrees to perform them in accordance with the terms of
         this Agreement and the written consents, orders or directions of the
         Exchange.

17.      The Issuer hereby acknowledges the terms and conditions of this
         Agreement and agrees to take all reasonable steps to facilitate the
         Issuer's performance under this Agreement and to pay the Trustee's
         proper charges for its services under this Agreement.

18.      The Securityholders and the Issuer hereby jointly and severally agree
         to and do hereby release and indemnify and save harmless the Trustee
         from and against all claims, suits, demands, costs, damages and
         expenses which may be occasioned by reason of the Trustee's compliance
         in good faith with the terms hereof.

19.      The Securityholders and the Issuer hereby jointly and severally agree
         to and do hereby release and indemnify the Exchange, its governors,
         officers and employees from and against all claims, suits, demands,
         costs, damages and expenses which may be occasioned by reason of the
         enforcement by the Exchange of any provision or provisions of this
         Agreement.

20.      In the event the Trustee wishes to resign, retire or otherwise
         terminate its obligations pursuant to this Agreement, it shall be
         required to provide at least ninety (90) days written notice to
         the Issuer.  Upon receipt of such notice, the Issuer may, with the
         written consent of the Exchange, by writing, appoint another
         Trustee in its place and such appointment shall be binding on the
         Securityholders, and the new Trustee shall assume and be bound by
         the obligations of the Trustee hereunder.

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October 1997                                                               10A-5

<PAGE>

The Alberta Stock Exchange                                              Form 10A
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21.      The covenants of the Securityholders with the Issuer in this agreement
         are made with the Issuer both in its own right and as trustee for the
         holders from time to time of free securities in the Issuer, and may be
         enforced not only by the Issuer but also by any holder of free
         securities.

22.      This Agreement may be executed in several parts of the same form and
         the parts as so executed shall together constitute one original
         agreement, and the parts, if more than one, shall be read together and
         construed as if all the signing parties hereto had executed one copy of
         this Agreement.

23.      This Agreement may be amended upon agreement of the Issuer, the Trustee
         and the Securityholders and upon the written consent having been
         obtained from the Exchange.

24.      This Agreement, Schedule "A" and all notes and instructions
         referred to herein constitute the entire understanding between the
         parties hereto with respect to the subject matter hereof and
         supersede all prior agreements, understandings, negotiations and
         discussions, whether oral or written, between the parties and
         there are no warranties, representations or other agreements
         between the parties in connection with this Agreement, except as
         specifically set forth herein.

25.      No waiver, modification or termination of this Agreement shall be
         binding on any of the parties unless executed in writing by all parties
         hereto. No waiver of any of the provisions of this Agreement shall be
         deemed or shall constitute a waiver of any other provision (whether
         similar or not), nor shall any waiver constitute a continuing waiver,
         unless expressly provided.

26.      This Agreement shall be interpreted in accordance with and governed in
         all respects by the laws of the Province of Alberta. The courts of
         Alberta shall have non-exclusive jurisdiction to entertain any action
         or proceeding brought by or against the Exchange or any of the parties.

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October 1997                                                               10A-6

<PAGE>

The Alberta Stock Exchange                                              Form 10A
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27.      This Agreement shall be read with all changes in gender or number
         as the context may require, and the word "person" or "persons" as
         used in this Agreement shall be deemed to include firms, partner
         ships, corporations and associations as well as  natural persons.
         Further, the term "Securityholders" shall include any permitted
         transferees within escrow and any person to whom the interest of
         a Securityholder may be transmitted by operation of law as
         provided in paragraph 9 and the term "Trustee" shall include a new
         Trustee appointed under paragraph 20, and whenever the singular or
         masculine is used, the same shall be construed to include the
         plural, feminine, neuter or a corporate or other entity where the
         context so requires.

28.      Any provision or any portion of any provision or provisions of
         this Agreement determined by a court of competent jurisdiction to
         be invalid, illegal or unenforceable shall be deemed stricken to
         the extent necessary to eliminate any invalidity, illegality or
         unenforceability and the rest of the Agreement and all other
         provisions and parts thereof shall remain in full force and effect
         and be binding upon the parties hereto as though the said illegal
         and/or unenforceable provision or provisions or part or parts
         thereof had never been included in this Agreement.

29.      This Agreement shall enure to the benefit of and be binding on each of
         the parties to this Agreement and each of their heirs, executors,
         administrators, successors and assigns.

         IN WITNESS WHEREOF, the Issuer, the Trustee and the Security holders
have executed this Agreement as of the date and year first above written.

INZECO HOLDINGS INC.

Per: /s/ Roger Short
     --------------------------
Per:
     -------------------------- (corporate seal)

MONTREAL TRUST COMPANY OF CANADA

Per: /s/ Gloria Collins
     --------------------------
Per:
     -------------------------- (corporate seal)

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October 1997                                                               10A-7

<PAGE>

The Alberta Stock Exchange                                              Form 10A
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         SIGNED by the respective Securityholders whose names are specified in
the right hand column below in the presence of the witness to such signature as
indicated opposite the signature of each Securityholder as specified in the
left hand column below.

                               Securityholders

                               /s/ Roger J. Short
                               -----------------------------------------

                               /s/ William R. Beavers
                               -----------------------------------------

                               /s/ Sheila M. Finn
                               -----------------------------------------

                               /s/ Warren D. Arseneau
                               -----------------------------------------

                               /s/ Michael Boyd
                               -----------------------------------------

                               /s/ Robert H. Stikeman
                               -----------------------------------------

                               GREENSULATE L.L.C.

                               Per: /s/ name of signatory illegible
                                    ------------------------------------

                               JUNIOR INDUSTRIAL FINANCE CORP.

                               Per: /s/ Michael Boyd
                                    ------------------------------------

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October 1997                                                               10A-8

<PAGE>

The Alberta Stock Exchange                                              Form 10A
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                                   RBC DOMINION IN TRUST FOR WILLIAM
                                   BEAVERS RRSP ACCOUNT #49380616-1-3

                                   Per: /s/ name of signatory illegible
                                        --------------------------------

                                   GUNDYCO IN TRUST FOR SHEILA FINN
                                   RRSP ACCOUNT #550-28824-17

                                   Per: /s/ name of signatory illegible
                                        --------------------------------

                                   T/D INVESTOR COMPANY IN TRUST FOR
                                   MIKE BOYD RRSP ACCOUNT #140422-S

                                   Per: /s/ name of signatory illegible
                                        --------------------------------

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October 1997                                                               10A-9

<PAGE>

The Alberta Stock Exchange                                              Form 10A
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                                  SCHEDULE "A"

         to the Escrow Agreement dated as of the 28th day of April,
         1998. Between the Issuer, the Trustee and the Securityholders
         noted herein.

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------
Name of Securityholders            Type of Securities           Number of Securities
---------------------------------------------------------------------------------------
<S>                                <C>                          <C>
ROGER J. SHORT                          Common Shares                   123,753
---------------------------------------------------------------------------------------
WILLIAM R. BEAVERS                      Common Shares                    49,000
---------------------------------------------------------------------------------------
RBC DOMINION IN TRUST                   Common Shares                    28,270
FOR WILLIAM BEAVERS RRSP
ACCOUNT #49380616-1-3
---------------------------------------------------------------------------------------
GREENSULATE L.L.C.                      Common Shares                   612,482
(a corporation controlled
by Martin H. Beck)
---------------------------------------------------------------------------------------
SHEILA M. FINN                          Common Shares                    54,527
---------------------------------------------------------------------------------------
GUNDYCO IN TRUST FOR                    Common Shares                    24,500
SHEILA FINN RRSP
ACCOUNT #550-28824-17
---------------------------------------------------------------------------------------
WARREN D. ARSENEAU                      Common Shares                   597,197
---------------------------------------------------------------------------------------
MICHAEL BOYD                            Common Shares                    43,974
---------------------------------------------------------------------------------------
T/D INVESTOR COMPANY IN                 Common Shares                    18,846
TRUST FOR MIKE BOYD RRSP
ACCOUNT #140422-S
---------------------------------------------------------------------------------------
JUNIOR INDUSTRIAL FINANCE               Common Shares                    48,245
CORP. (a corporation
wholly owned by Michael
Boyd)
---------------------------------------------------------------------------------------
ROBERT H. STIKEMAN                      Common Shares                    40,204

</TABLE>

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October 1997                                                              10A-10<PAGE>

                                                                    EXHIBIT 10.8
The Alberta Stock Exchange                                              Form 10B
--------------------------------------------------------------------------------

                                ESCROW AGREEMENT
                                  (PERFORMANCE)

         THIS AGREEMENT made in triplicate, as of this 28th day of April, 1998.

AMONG:

                              INZECO HOLDINGS INC.
                          (herein called the "Issuer")

                                                               OF THE FIRST PART

                                     - and -

                        MONTREAL TRUST COMPANY OF CANADA
                          (herein called the "Trustee")

                                                              OF THE SECOND PART

                                     - and -

         ROGER J. SHORT, WILLIAM R. BEAVERS, GREENSULATE L.L.C.,
         SHEILA M. FINN, WARREN D. ARSENEAU, MICHAEL BOYD, JUNIOR
         INDUSTRIAL FINANCE CORP., ROBERT H. STIKEMAN, GUNDYCO
         IN TRUST FOR SHEILA FINN RRSP ACCOUNT #550-28824-17, T/D
         INVESTOR COMPANY IN TRUST FOR MIKE BOYD RRSP ACCOUNT
         #140422-S, RBC DOMINION IN TRUST FOR WILLIAM BEAVERS RRSP
         ACCOUNT #49380616-1-3
                     (herein called the "Securityholders")

                                                               OF THE THIRD PART

         WHEREAS, in order to comply with the requirements of the Alberta
Securities Act, S.A. 1981, c.S-6.1 as amended. The Alberta Stock Exchange (the
"Exchange"), the Securityholders have agreed to deposit certain securities of
the Issuer owned or to be received by them into escrow in accordance with the
terms of this Escrow Agreement;

         AND WHEREAS, in order to comply with the requirements of The Alberta
Stock Exchange (the "Exchange"), the Securityholders are desirous of depositing
in escrow certain securities of the Issuer owned or to be received by them;

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October 1997                                                               10B-1

<PAGE>

The Alberta Stock Exchange                                              Form 10B
--------------------------------------------------------------------------------

         AND WHEREAS, the Trustee has agreed to undertake and perform its
duties according to the terms and conditions thereof;

         NOW, THEREFORE, this agreement witnesses that, in consideration of the
sum of One ($1.00) Dollar paid by the parties to each other, receipt of this
sum being acknowledged by each of the parties, the Securityholders jointly and
severally covenant and agree with the Issuer and with the Trustee, and the
Issuer and the Trustee covenant and agree each with the other and with the
Securityholders jointly and severally as follows:

1.       Where used in this agreement, or in any amendment or supplement hereto,
         unless the context otherwise requires, the following words and phrases
         shall have the following ascribed to them below:

         (a)      "CASH FLOW" means net income derived from the property, as
                  shown on the audited financial statements or verified by the
                  Issuer's auditors, adjusted for the following add-backs: (i)
                  depreciation, (ii) depletion, (iii) deferred taxes, (iv)
                  amortization of goodwill, (v) amortization of research and
                  development costs.

         (b)      "RELATED PARTY" means a promoter, officer, director, insider
                  or control person of the Issuer and any associates or
                  affiliates of these parties.

2.       Each of the Securityholders hereby places and deposits in escrow with
         the Trustee those of his securities of the Issuer which are represented
         by the certificates described in Schedule "A" (the "Escrowed
         Securities") and the Trustee hereby acknowledges receipt of such
         Escrowed Securities. Each Securityholder further undertakes and agrees
         to deposit into escrow any further securities of the Issuer which the
         Securityholder may receive as a stock dividend on the Escrowed
         Securities and to deliver to the Trustee immediately on receipt thereof
         the certificates (if any) for any such further securities and any
         replacement certificates which may at any time be issued for any of the
         Escrowed Securities.

3.       Each of the Securityholders shall be entitled to a letter or receipt
         from the Trustee stating the number of securities held for the
         Securityholder by the Trustee subject to the terms of this Agreement.
         It is expressly understood and agreed by the parties hereto that such
         letter or receipt shall not be assignable or transferrable.

4.       Each of the Securityholders hereby underakes and agrees to deposit in
         escrow with the Trustee any securities of the Issuer owned or acquired
         by the Securityholder in accordance with the escrow restrictions
         imposed by the Exchange.

5.       The Parties hereby agree that the Escrowed Securities and the
         beneficial ownership of or any interest in them and the certificates
         representing them (including any replacement securities or
         certificates) shall remain in escrow and shall be released only in
         accordance with the terms hereof and on the written consent of the
         Exchange to the Trustee.

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October 1997                                                               10B-2

<PAGE>

The Alberta Stock Exchange                                              Form 10B
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6.       The Securityholders direct the Trustee to retain their respective
         securities and the certificates (including any replacement securities
         or certificates) representing them and not to do or cause anything to
         be done to release them from escrow or to allow any transfer,
         hypothecation or alienation thereof, without the written consent of the
         Exchange.

7.       The Parties agree that a partial release of the Escrowed Securities
         shall release from escrow only the securities specified in it, and this
         Agreement shall continue in full force and effect in respect of those
         securities as may from time to time remain in escrow until all of the
         Escrowed Securities have been either released pursuant to paragraph 11
         or on the written consent of the Exchange, or canceled pursuant to
         paragraph 15 hereof. For greater certainty, this paragraph does not
         apply to securities transferred within escrow.

8.       In the event of bankruptcy or death of a Securityholder, the Trustee,
         upon receipt of written notification by the Exchange, may transmit the
         Securityholder's securities by operation of law to the trustee in
         bankruptcy, person representative or surviving joint tenant as the case
         may be but, notwithstanding such transmission, the securities shall
         remain subject to the terms of this Agreement.

9.       The Exchange may consent in writing to the transfer within escrow or
         hypothecation within escrow of any of the Escrowed Securities, subject
         to written confirmation by the transferee or mortgagee to be bound by
         the terms of this Agreement and subject also to such other terms and
         conditions as the Exchange may impose, and the Trustee, on receipt of
         the written consent of the Exchange and of the agreement of the
         transferee or mortgagee as described, shall permit such transfer within
         escrow or hypothecation within escrow.

10.      Any Securityholder applying to the Exchange for a consent for a
         transfer within escrow shall, before applying, give reasonable notice
         in writing of his intention to the Issuer and the Trustee. The
         Securityholders hereby acknowledge that any transferee of any Escrowed
         Securities shall be required to become bound by all of the provisions
         hereof.

11.      (a)      The Exchange will generally consent to the release from escrow
                  of one share for each $0.20 of Cash Flow generated by or from
                  the Issuer.

         (b)      Any release from escrow under this paragraph 11 shall be made
                  pursuant to a written application on behalf of the Issuer or
                  the Securityholders, which application shall be accompanied by
                  evidence of the Cash Flow received or Deferred Expenditures
                  incurred in a form satisfactory to the Exchange. Application
                  for release may only be made once per year and may only relate
                  to Cash Flow received or Deferred Expenditures incurred in the
                  preceding fiscal year or the fiscal years of the Issuer since
                  the last release from escrow pursuant to this Agreement,
                  whichever is greater. All shares released from escrow shall,
                  unless otherwise directed by the Exchange, be distributed
                  pro-rata to all Securityholders.

         (c)      Notwithstanding subparagraph (b) above, the maximum number of
                  shares which may be released from escrow in any one calendar
                  year to any Securityholder who is a Related Party shall be one
                  third of the original number of shares held in escrow on
                  behalf of such Securityholder.

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October 1997                                                               10B-3

<PAGE>

The Alberta Stock Exchange                                              Form 10B
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12.      The Securityholders hereby renounce and release any right to receive
         payment of any dividend (other than a stock dividend) which may be
         payable on any Escrowed Securities with the intent that the dividend
         shall not be paid on securities which are in escrow on the record date
         set for the dividend.

13.      If the Issuer is wound up and any securities remain in escrow under
         this agreement at the time when a distribution of assets to holders of
         securities is made by the liquidator, the Securityholders do hereby
         assign their right to receive that part of the distribution which is
         attributable to the Escrowed Securities to the Trustee, for the benefit
         of, and in trust for the persons and companies who are then
         Securityholders of the Issuer whose securities are not subject to this
         Agreement, rateably in proportion to their holdings.

14.      (a)      In the event that the Exchange determines or becomes aware
                  that the Issuer has lost, alienated or has not obtained a good
                  or marketable title to, or has abandoned or discontinued
                  development of, any or all of the aforesaid property or
                  asset(s) which was or formed all or any part of the
                  consideration for which the Escrowed Securities were issued,
                  or that any or all of the said property or asset(s) has become
                  a little or no value, the Issuer shall declare the occurrence
                  of that event, with full particulars thereof, to the Exchange
                  by a resolution of its directors, and those Securityholders
                  who are directors from time to time hereby agree to cause such
                  resolution to be passed and certified to the satisfaction of
                  the Exchange.

         (b)      The Securityholders jointly and severally agree with the
                  Issuer and the Trustee that in the vent of any such loss,
                  alienation, failure to acquire title, or of such abandonment
                  or discontinuance of development or diminution of value, the
                  Escrowed Securities shall not be canceled or released from
                  escrow, in whole or in part, except with the consent of the
                  Exchange.

         (c)      The Exchange may, in its sole discretion, having regard to the
                  number and value of the securities issued for the property or
                  asset, the value of the property as ultimately established and
                  such other circumstances as it may consider relevant,
                  determine the number of securities to be canceled or released
                  and shall communicate its decision in writing to the Trustee.
                  If the Exchange determines that less than the total Escrowed
                  Securities shall be canceled or released, the securities to be
                  canceled or released shall be allocated proportionately
                  amongst the Securityholders in relation to their respective
                  shareholdings of the Issuer, unless the Exchange otherwise
                  directs or the Securityholders, with the consent of the
                  Exchange, otherwise agree in writing.

         (d)      On receipt by the Trustee of a direction from the Exchange to
                  cancel any Escrowed Securities, the Trustee shall tender the
                  required number of Escrowed Securities to the Issuer for
                  cancellation and the Issuer shall thereupon take the necessary
                  action, by way of reduction of capital or otherwise, to cancel
                  the Escrowed Securities, and the certificates for these
                  securities shall be delivered up for cancellation by the
                  Issuer's transfer agent.

         (e)      Each of the Securityholders undertakes and agrees to vote and
                  cause to be voted their respective securities in a manner
                  consistent with the terms, conditions and intent of this
                  Agreement in relation to the aforesaid cancellation of
                  Escrowed Securities.

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October 1997                                                               10B-4

<PAGE>

The Alberta Stock Exchange                                              Form 10B
--------------------------------------------------------------------------------

15.      Notwithstanding paragraphs 11 and 14, any Escrowed Securities not
         released from escrow in accordance with the terms of this Agreement
         before the expiration of five (5) years from the date of this Agreement
         shall be canceled forthwith and the Issuer and the Trustee hereby
         undertake and agree to take all actions as may be necessary to
         expeditiously effect such cancellation.

16.      For the purposes of effecting a cancellation of Escrowed Securities
         pursuant to paragraphs 14 and 15 the Securityholders hereby irrevocably
         appoint the Trustee as their attorney for the purposes of canceling the
         Escrowed Securities, with authority to substitute one or more persons
         or entities with the like powers.

17.      All voting rights attached to the escrowed securities shall at all
         times be exercised by the respective registered owners thereof.

18.      The Securityholders agree that, while any of their securities are held
         in escrow under this Agreement, they will not, without the prior
         written consent of the Exchange, vote any of their securities (whether
         escrowed or not) in support of any arrangement that would result in a
         repayment of capital being made on the Escrowed Securities prior to the
         commencement of any winding up of the Issuer.

19.      The Securityholders and the Issuer hereby jointly and severally agree
         to and do hereby release and indemnify and save harmless the Trustee
         from and against all claims, suits, demands, costs, damages and
         expenses which may be occasioned by reason of the Trustee's compliance
         in good faith with the terms hereof, including, but not limited to, any
         action taken by the Trustee to effect the cancellation of or to
         surrender to the Issuer for cancellation all or any portion of the
         Escrowed Securities pursuant to paragraphs 14 and 15.

20.      The Securityholders and the Issuer hereby jointly and severally agree
         to and do hereby release and indemnify the Exchange, its governors,
         officers and employees from and against all claims, suits, demands,
         actions, costs, damages and expenses which may be occasioned by reason
         of the enforcement by the Exchange of or compliance with any of the
         provisions of this Agreement, including, but not limited to, any
         determination made by the Exchange that the cancellation of all or any
         portion of the Escrowed Securities is appropriate in accordance with
         the provisions of paragraphs 14 and 15.

21.      The Trustee accepts the responsibilities placed on it by this Agreement
         and agrees to perform them in accordance with the terms of this
         Agreement and the written consents, orders or directions of the
         Exchange.

22.      The Issuer hereby acknowledges the terms and conditions of this
         Agreement and agrees to take all reasonable steps to facilitate its
         performance and to pay the Trustee's proper charges for its services
         under this Agreement.

23.      In the event the Trustee wishes to resign, retire or otherwise
         terminate its obligations pursuant to this Agreement, it shall be
         required to provide at least ninety (90) days written notice to the
         Issuer. Upon receipt of such notice the Issuer may, with the written
         consent of the Exchange, by writing, appoint another Trustee in its
         place and such appointment shall be binding on the Securityholders and
         the new Trustee shall assume and be bound by the obligations of the
         Trustee hereunder.

--------------------------------------------------------------------------------
October 1997                                                               10B-5

<PAGE>

The Alberta Stock Exchange                                              Form 10B
--------------------------------------------------------------------------------

24.      The covenants of the Securityholders with the Issuer in this agreement
         are made with the Issuer both in its own right and as trustee for the
         holders from time to time of free securities in the Issuer, and may be
         enforced not only by the Issuer but also by any holder of free
         securities.

25.      This agreement may be executed in several parts of the same form and
         the parts as so executed shall together constitute one original
         agreement, and the parts, if more than one, shall be read together and
         construed as if all the signing parties hereto had executed one copy of
         this agreement.

26.      This Agreement may be amended upon agreement of the Issuer, the Trustee
         and the Securityholders and upon the written consent having been
         obtained from the Exchange.

27.      This Agreement and Schedule "A" attached hereto contains the entire
         understanding between the parties hereto with respect to the subject
         matter hereof and supersedes all prior agreements, understandings,
         negotiations and discussions, whether oral or written, between the
         parties and there are no warranties, representations or other
         agreements between the parties in connection with this Agreement,
         except as specifically set forth herein.

28.      No waiver, modification or termination of this Agreement shall be
         binding on any of the parties unless executed in writing by all parties
         hereto. No waiver of any of the provisions of this Agreement shall be
         deemed or shall constitute a waiver of any other provision (whether
         similar or not), nor shall any waiver constitute a continuing waiver,
         unless expressly provided.

29.      This Agreement shall be interpreted in accordance with and governed in
         all respects by the laws of the Province of Alberta. The courts of
         Alberta shall have non-exclusive jurisdiction to entertain any action
         or proceeding brought by or against the Exchange or any of the parties
         hereto in connection with this Agreement or any alleged breach hereof
         and the parties hereby expressly agree to attorn to the jurisdiction of
         such courts for that purpose.

30.      This Agreement shall be read with all changes in gender or number as
         the context may require, and the word "person" or "persons" as used in
         this Agreement shall be deemed to include firms, partnerships,
         corporations and associations as well as natural persons. Further, the
         term "Securityholders" shall include any permitted transferees within
         escrow and any person to whom the interest of a Securityholder may be
         transmitted by operation of law as provided in paragraph 8 and the term
         "Trustee" shall include a new Trustee appointed under paragraph 23, and
         whenever the singular or masculine is used, the same shall be construed
         to include the plural, feminine, neuter or a corporate or other entity
         where the context so requires.

31.      Any provision or any portion of any provision or provisions of this
         Agreement determined by a court of competent jurisdiction to be
         invalid, illegal or unenforceable shall be deemed stricken to the
         extent necessary to eliminate any invalidity, illegality or
         unenforceability and the rest of the Agreement and all other provisions
         and parts thereof shall remain in full force and effect and be binding
         up the parties hereto as though he said illegal and/or unenforceable
         provision or provisions or part or parts thereof had never been
         included in this Agreement.

32.      This agreement shall enure to the benefit of and be binding on the
         parties to this agreement and each of their heirs, executors,
         administrators, successors and assigns.

--------------------------------------------------------------------------------
October 1997                                                               10B-6

<PAGE>

The Alberta Stock Exchange                                              Form 10B
--------------------------------------------------------------------------------

         IN WITNESS WHEREOF, the Issuer, the Trustee and the Securityholders
have executed this Agreement as of the date and year first above written.

INZECO HOLDINGS INC.

Per: /s/ Warren Arseneau
     --------------------------
Per:
     -------------------------- (corporate seal)

MONTREAL TRUST COMPANY OF CANADA

Per: /s/ Gloria Collins
     --------------------------
Per:
     -------------------------- (corporate seal)

--------------------------------------------------------------------------------
October 1997                                                               10B-7

<PAGE>

The Alberta Stock Exchange                                              Form 10B
--------------------------------------------------------------------------------

         SIGNED by the respective Securityholders whose names are specified in
the right hand column below in the presence of the witness to such signature as
indicated opposite the signature of each Securityholder as specified in the
left hand column below.

                               Securityholders

                               /s/ Roger J. Short
                               -----------------------------------------
                               Roger J. Short

                               /s/ William R. Beavers
                               -----------------------------------------
                               William R. Beavers

                               /s/ Sheila M. Finn
                               -----------------------------------------
                               Sheila M. Finn

                               /s/ Warren D. Arseneau
                               -----------------------------------------
                               Warren D. Arseneau

                               /s/ Michael Boyd
                               -----------------------------------------
                               Michael Boyd

                               /s/ Robert H. Stikeman
                               -----------------------------------------
                               Robert H. Stikeman

                               GREENSULATE L.L.C.

                               Per: /s/ name of signatory illegible
                                    ------------------------------------

                               JUNIOR INDUSTRIAL FINANCE CORP.

                               Per: /s/ Michael Boyd
                                    ------------------------------------

                                   RBC DOMINION IN TRUST FOR WILLIAM
                                   BEAVERS RRSP ACCOUNT #49380616-1-3

                                   Per: /s/ name of signatory illegible
                                        --------------------------------

                                   GUNDYCO IN TRUST FOR SHEILA FINN
                                   RRSP ACCOUNT #550-28824-17

                                   Per: /s/ name of signatory illegible
                                        --------------------------------

                                   T/D INVESTOR COMPANY IN TRUST FOR
                                   MIKE BOYD RRSP ACCOUNT #140422-S

                                   Per: /s/ name of signatory illegible
                                        --------------------------------

--------------------------------------------------------------------------------
October 1997                                                               10B-8
<PAGE>

The Alberta Stock Exchange                                              Form 10B
--------------------------------------------------------------------------------

                                  SCHEDULE "A"

        To the Escrow Agreement dated as of the 28th day of April, 1998.

<TABLE>
<CAPTION>

---------------------------------------------------------------------------------------------------------------
Name of Securityholders                               Type of Securities                 Number of Securities
---------------------------------------------------------------------------------------------------------------
<S>                                                   <C>                                <C>
ROGER J. SHORT                                           Common Shares                          701,265
---------------------------------------------------------------------------------------------------------------
WILLIAM R. BEAVERS                                       Common Shares                          277,657
---------------------------------------------------------------------------------------------------------------
RBC DOMINION IN TRUST FOR WILLIAM                        Common Shares                          160,186
BEAVERS RRSP ACCOUNT #49380616-1-3
---------------------------------------------------------------------------------------------------------------
GREENSULATE L.L.C.                                       Common Shares                        3,470,730
(a corporation controlled by Martin H. Beck)
---------------------------------------------------------------------------------------------------------------
SHEILA M. FINN                                           Common Shares                          308,984
---------------------------------------------------------------------------------------------------------------
GUNDYCO IN TRUST FOR SHEILA FINN                         Common Shares                          138,828
RRSP ACCOUNT #550-28824-17
---------------------------------------------------------------------------------------------------------------
WARREN D. ARSENEAU                                       Common Shares                        3,384,110
---------------------------------------------------------------------------------------------------------------
MICHAEL BOYD                                             Common Shares                          249,180
---------------------------------------------------------------------------------------------------------------
T/D INVESTOR COMPANY IN TRUST FOR                        Common Shares                          106,791
MIKE BOYD RRSP ACCOUNT #140422-S
---------------------------------------------------------------------------------------------------------------
JUNIOR INDUSTRIAL FINANCE CORP.                          Common Shares                          273,386
(a corporation wholly owned by Michael Boyd)
---------------------------------------------------------------------------------------------------------------
ROBERT H. STIKEMAN                                       Common Shares                          227,822
---------------------------------------------------------------------------------------------------------------
</TABLE>

--------------------------------------------------------------------------------
October 1997                                                               10B-9

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