Document:

EXHIBIT 10.69

            THIRD AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT

         This THIRD AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT (this
"Amendment"), made and entered into as of February 18, 2004, is by and between
WTC Industries, Inc., a Delaware corporation, Pentapure Incorporated, a
Minnesota corporation, (collectively, the "Borrowers"), and U.S. Bank National
Association, a national banking association (the "Lender").

                                    RECITALS

         1. The Lender and the Borrowers entered into an Amended and Restated
Credit Agreement dated as of February 27, 2002 as amended by a First Amendment
to Amended and Restated Credit Agreement dated as of June 24, 2002 and a Second
Amendment to Amended and Restated Credit Agreement dated as of March 3, 2003 (as
amended, the "Credit Agreement"); and

         2. Pursuant to the Second Amendment to Amended and Restated Credit
Agreement the Lender made available to the Borrowers an Advancing Term Loan
(2003) pursuant to which the Borrowers could borrow up to $3,000,000 to be
repaid over a term of 48 months

         3. No amounts were borrowed under the Advancing Term Loan (2003) prior
to the expiration of the advancing period thereunder and the Borrowers and the
Lender have agreed to extend the advancing period on such Advancing Term Loan,
on the terms and subject to the conditions of this Amendment.

                                    AGREEMENT

         NOW, THEREFORE, for good and valuable consideration, the receipt and
adequacy of which are hereby acknowledged, the parties hereto hereby covenant
and agree to be bound as follows:

         SECTION 1. CAPITALIZED TERMS. Capitalized terms used herein and not
otherwise defined herein shall have the meanings assigned to them in the Credit
Agreement, unless the context shall otherwise require.

         SECTION 2. AMENDMENTS. The Credit Agreement is hereby amended as
follows:

                  2.1 GLOBAL CHANGE. Each reference to Advancing Term Loan
         (2003) or like references to Advancing Term Note (2003) and each other
         reference to any term using "(2003)" is changed such that the
         parenthetical reference (2003) is changed to (2004).

                  2.2 SECTIONS 2.1(C) OF THE CREDIT AGREEMENT. Section 2.1(c) of
         the Credit Agreement is amended in its entirety to read as follows:

                           2.1(c) ) Advancing Term Loan (2004). A term loan,
                  available in multiple Advances (the "Advancing Term Loan
                  (2004)") from the date of a Borrower's first request for

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                  an Advance thereunder through March 31, 2004, in an aggregate
                  principal amount not to exceed $3,000,000 (the "Advancing Term
                  Loan (2004) Commitment Amount").

                  2.3 DELETION OF FEE. Section 2.9(b) of the Credit Agreement is
         deleted.

                  2.8 EXHIBITS. Exhibit 2.3(c) is deleted from the Credit
         Agreement and Exhibit 2.3(c) as attached hereto is added to the Credit
         Agreement as Exhibit 2.3(c).

         SECTION 3. EFFECTIVENESS OF AMENDMENTS. The amendments contained in
this Amendment shall become effective upon delivery by the Borrowers of, and
compliance by the Borrowers with, the following:

                  3.1 This Amendment and the Advancing Term Note (2004)
         substantially in the form of Exhibit 2.3(c) (there are no Exhibits
         2.3(a) and 2.3(b) to this Amendment) hereto must be executed and
         delivered to the Lender prior to the first Advance thereon).

                  3.2 A copy of the resolutions of the Board of Directors of the
         Corporate Borrowers authorizing the execution, delivery and performance
         of this Amendment and the Advancing Term Note (2004) (the "Note")
         certified as true and accurate by its Secretary or Assistant Secretary,
         along with a certification by such Secretary or Assistant Secretary (i)
         certifying that there has been no amendment to the Certificate of
         Incorporation or Bylaws of the Corporate Borrowers since true and
         accurate copies of the same were delivered to the Lender with a
         certificate of the Secretary, and (ii) identifying each officer of the
         Corporate Borrower authorized to execute this Amendment, the Note and
         any other instrument or agreement executed by the Borrower in
         connection with this Amendment (collectively, the "Amendment
         Documents"), and certifying as to specimens of such officer's signature
         and such officer's incumbency in such offices as such officer holds.

                  3.3 Certified copies of all documents evidencing any necessary
         corporate action, consent or governmental or regulatory approval (if
         any) with respect to this Amendment.

                  3.4 The Borrowers shall have satisfied such other conditions
         as specified by the Lender, including payment of all unpaid legal fees
         and expenses incurred by the Lender through the date of this Amendment
         in connection with the Credit Agreement and the Amendment Documents.

         SECTION 4. REPRESENTATIONS, WARRANTIES, AUTHORITY, NO ADVERSE CLAIM.

         4.1 REASSERTION OF REPRESENTATIONS AND WARRANTIES, NO DEFAULT. The
Borrowers hereby represent that on and as of the date hereof and after giving
effect to this Amendment (a) all of the representations and warranties contained
in the Credit Agreement are true, correct and complete in all respects as of the
date hereof as though made on and as of such date, except for changes permitted
by the terms of the Credit Agreement, and (b) there will exist no Default or
Event of Default under the Credit Agreement as amended by this Amendment on such
date which has not been waived by the Lender.

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         4.2 AUTHORITY, NO CONFLICT, NO CONSENT REQUIRED. The Borrowers
represent and warrant that the Borrowers have the power and legal right and
authority to enter into the Amendment Documents and has duly authorized as
appropriate the execution and delivery of the Amendment Documents and other
agreements and documents executed and delivered by the Borrowers in connection
herewith or therewith by proper corporate action, and none of the Amendment
Documents nor the agreements contained herein or therein contravenes or
constitutes a default under any agreement, instrument or indenture to which a
Borrower is a party or a signatory or a provision of the Corporate Borrower's
Certificate or Articles of Incorporation, Bylaws or any other agreement or
requirement of law, or result in the imposition of any Lien on any of its
property under any agreement binding on or applicable to a Borrower or any of
its property except, if any, in favor of the Lender. The Borrowers represent and
warrant that no consent, approval or authorization of or registration or
declaration with any Person, including but not limited to any governmental
authority, is required in connection with the execution and delivery by the
Borrowers of the Amendment Documents or other agreements and documents executed
and delivered by the Borrowers in connection therewith or the performance of
obligations of the Borrowers therein described, except for those which the
applicable Borrower has obtained or provided and as to which such Borrower has
delivered certified copies of documents evidencing each such action to the
Lender.

         4.3 NO ADVERSE CLAIM. The Borrowers warrant, acknowledge and agree that
no events have been taken place and no circumstances exist at the date hereof
which would give any Borrower a basis to assert a defense, offset or
counterclaim to any claim of the Lender with respect to the Borrowers'
obligations under the Credit Agreement as amended by this Amendment.

         SECTION 5. AFFIRMATION OF CREDIT AGREEMENT, FURTHER REFERENCES,
AFFIRMATION OF SECURITY INTEREST. The Lender and the Borrowers each acknowledge
and affirm that the Credit Agreement, as hereby amended, is hereby ratified and
confirmed in all respects and all terms, conditions and provisions of the Credit
Agreement, except as amended by this Amendment, shall remain unmodified and in
full force and effect. All references in any document or instrument to the
Credit Agreement are hereby amended and shall refer to the Credit Agreement as
amended by this Amendment. The Borrowers confirm to the Lender that the
Borrowers' obligations under the Credit Agreement, as amended by this Amendment
and including, without limitation, the Note, are and continue to be secured by
the security interest granted by the Borrowers in favor of the Lender under the
Security Agreements dated as of February 27, 2002 and any prior security
agreements that remain in effect, and all of the terms, conditions, provisions,
agreements, requirements, promises, obligations, duties, covenants and
representations of the Borrowers under such documents and any and all other
documents and agreements entered into with respect to the obligations under the
Credit Agreement are incorporated herein by reference and are hereby ratified
and affirmed in all respects by the Borrowers.

         SECTION 6. MERGER AND INTEGRATION, SUPERSEDING EFFECT. This Amendment,
from and after the date hereof, embodies the entire agreement and understanding
between the parties hereto and supersedes and has merged into this Amendment all
prior oral and written agreements on the same subjects by and between the
parties hereto with the effect that this Amendment, shall control with respect
to the specific subjects hereof and thereof.

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<PAGE>

         SECTION 7. SEVERABILITY. Whenever possible, each provision of this
Amendment and the other Amendment Documents and any other statement, instrument
or transaction contemplated hereby or thereby or relating hereto or thereto
shall be interpreted in such manner as to be effective, valid and enforceable
under the applicable law of any jurisdiction, but, if any provision of this
Amendment, the other Amendment Documents or any other statement, instrument or
transaction contemplated hereby or thereby or relating hereto or thereto shall
be held to be prohibited, invalid or unenforceable under the applicable law,
such provision shall be ineffective in such jurisdiction only to the extent of
such prohibition, invalidity or unenforceability, without invalidating or
rendering unenforceable the remainder of such provision or the remaining
provisions of this Amendment, the other Amendment Documents or any other
statement, instrument or transaction contemplated hereby or thereby or relating
hereto or thereto in such jurisdiction, or affecting the effectiveness, validity
or enforceability of such provision in any other jurisdiction.

         SECTION 8. SUCCESSORS. The Amendment Documents shall be binding upon
the Borrowers and the Lender and their respective successors and assigns, and
shall inure to the benefit of the Borrowers and the Lender and the successors
and assigns of the Lender.

         SECTION 9. LEGAL EXPENSES. The Borrowers agree to reimburse the Lender,
upon execution of this Amendment, for all reasonable out-of-pocket expenses
(including attorney' fees and legal expenses of Dorsey & Whitney LLP, counsel
for the Lender) incurred in connection with the Credit Agreement, including in
connection with the negotiation, preparation and execution of the Amendment
Documents and all other documents negotiated, prepared and executed in
connection with the Amendment Documents, and in enforcing the obligations of the
Borrowers under the Amendment Documents, and to pay and save the Lender harmless
from all liability for, any stamp or other taxes which may be payable with
respect to the execution or delivery of the Amendment Documents, which
obligations of the Borrowers shall survive any termination of the Credit
Agreement.

         SECTION 10. HEADINGS. The headings of various sections of this
Amendment have been inserted for reference only and shall not be deemed to be a
part of this Amendment.

         SECTION 11. COUNTERPARTS. The Amendment Documents may be executed in
several counterparts as deemed necessary or convenient, each of which, when so
executed, shall be deemed an original, provided that all such counterparts shall
be regarded as one and the same document, and either party to the Amendment
Documents may execute any such agreement by executing a counterpart of such
agreement.

         SECTION 12. GOVERNING LAW. THE AMENDMENT DOCUMENTS SHALL BE GOVERNED BY
THE INTERNAL LAWS OF THE STATE OF MINNESOTA, WITHOUT GIVING EFFECT TO CONFLICT
OF LAW PRINCIPLES THEREOF, BUT GIVING EFFECT TO FEDERAL LAWS APPLICABLE TO
NATIONAL BANKS, THEIR HOLDING COMPANIES AND THEIR AFFILIATES.

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<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed as of the date and year first above written.

BORROWERS:                                  WTC INDUSTRIES, INC.

                                            By:    /s/ Greg Jensen
                                                   -----------------------------

                                            Title  CFO
                                                   -----------------------------

                                            PENTAPURE INCORPORATED

                                            By:    /s/ Greg Jensen
                                                   -----------------------------

                                            Title  CFO
                                                   -----------------------------

LENDER:                                     U.S. BANK NATIONAL ASSOCIATION

                                            By:    /s/ Jerry Welle
                                                   -----------------------------

                                            Title  Vice President
                                                   -----------------------------

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                           ADVANCING TERM NOTE (2004)

$3,000,000                                                     February 18, 2004
                                                             St. Paul, Minnesota

         FOR VALUE RECEIVED, WTC INDUSTRIES, INC., a Delaware corporation, and
PENTAPURE INCORPORATED, a Minnesota corporation, hereby jointly and severally
promise to pay to the order of U.S. BANK NATIONAL ASSOCIATION (the "Lender") at
its office in St. Paul, Minnesota, in lawful money of the United States of
America in immediately available funds, the principal amount of THREE MILLION
DOLLARS AND NO CENTS ($3,000,000) or if less, the full amount of the Advancing
Term Loan (2004)(as such term and each capitalized term used herein are defined
in the Credit Agreement hereinafter defined) advanced under the Credit
Agreement, and to pay interest (computed on the basis of actual days elapsed and
a year of 360 days) in like funds on the unpaid principal amount hereof from
time to time outstanding at the rate set forth in the Credit Agreement.

         Principal shall be paid in equal installments in an amount sufficient
to amortize the full amount outstanding on March 31, 2004 in 48 installments,
plus accrued unpaid interest, commencing on May 1, 2004 and continuing on the
first day of each month through March 1, 2008, with one final installment equal
to the entire remaining unpaid principal balance and all accrued and unpaid
interest on April 1, 2008. Interest only payments are due on the first day of
each month from the date of the first Advance hereunder until May 1, 2004.

         This note is the Advancing Term Note (2004) referred to in the Amended
and Restated Credit Agreement dated as of February 27, 2002 (as amended and as
the same may hereafter be from time to time amended, restated or otherwise
modified, the "Credit Agreement") between the undersigned and the Lender. This
note is secured and its maturity is subject to acceleration, in each case upon
the terms provided in said Credit Agreement.

         In the event of default hereunder, the undersigned agrees to pay all
costs and expenses of collection, including reasonable attorneys' fees. The
undersigned waives demand, presentment, notice of nonpayment, protest, notice of
protest and notice of dishonor.

<PAGE>

         THE VALIDITY, CONSTRUCTION AND ENFORCEABILITY OF THIS NOTE SHALL BE
GOVERNED BY THE INTERNAL LAWS OF THE STATE OF MINNESOTA WITHOUT GIVING EFFECT TO
THE CONFLICT OF LAWS PRINCIPLES THEREOF, BUT GIVING EFFECT TO FEDERAL LAWS OF
THE UNITED STATES APPLICABLE TO NATIONAL BANKS.

                                      WTC INDUSTRIES, INC.

                                      By     /s/ Greg Jensen
                                        ------------------------------------
                                      Title  CFO
                                           ---------------------------------

                                      PENTAPURE INCORPORATED

                                      By     /s/ Greg Jensen
                                        ------------------------------------
                                      Title  CFO
                                           ---------------------------------EXHIBIT 10.70

                             FIRST INDUSTRIAL, L.P.
                                  STANDARD FORM
                      INDUSTRIAL BUILDING LEASE SHORT FORM
                                 (Multi-Tenant)

         1. BASIC TERMS. This Section 1 contains the Basic Terms of this Lease
between Landlord and Tenant, named below.

         1.1.     Date of Lease: January 22, 2004
         1.2.     Landlord: First Industrial, L.P., a Delaware limited
                  partnership
         1.3.     Tenant: Penta Pure Corporation, a Minnesota corporation
         1.4.     Premises: Approximately 10,000 square feet of warehouse space
                  in the building commonly known as Armstrong Business Center
                  II, 980 Lone Oak Road, Suite 134, Eagan, MN ("Building").
         1.5.     Property: See Exhibit A.
         1.6.     Lease Term: Month-To-Month ("Term"), commencing February 2,
                  2004* ("Commencement Date") and ending ("Expiration Date").
                  THE TERM OF THIS LEASE SHALL CONTINUE ON A MONTH-TO-MONTH
                  BASIS AND MAY BE TERMINATED BY LANDLORD UPON FIFTEEN (15) DAYS
                  PRIOR WRITTEN NOTICE TO TENANT AND TENANT UPON FIFTEEN (15)
                  DAYS PRIOR WRITTEN NOTICE TO LANDLORD.
         1.7.     Permitted Uses: (See Section 3) Warehouse + access through
                  front door.
         1.8.     Security Deposit: (See Section 4) $5,500.00
         1.9.     Gross Rent Payable by Tenant shall be: $5,508.33 per month.
                  Payable in advance
         1.10.    Tenant's Proportionate Share: N/A %
         1.11.    Riders to Lease: The following riders are attached to and made
                  a part of this Lease. (If none, so state) Exhibits A - C

         2. LEASE OF PREMISES; RENT.

                  2.1. Lease of Premises for Lease Term. Landlord hereby leases
the Premises to Tenant, and Tenant hereby rents the Premises from Landlord, for
the Term and subject to the conditions of this Lease.

                  2.2. Types of Rental Payments. Tenant shall pay rents, payable
in monthly installments as set forth in SECTION 1.9 hereof, in advance, on the
first day of each and every calendar month during the Term of this Lease (the
"GROSS RENT"). In the event any monthly installment of Base Rent or Additional
Rent, or both, is not paid within 10 days of the date when due, a late charge in
an amount equal to 5% of the then delinquent installment of Gross Rent and/or
Additional Rent (the "LATE CHARGE"; the Late Charge, Base Rent and Additional
Rent shall collectively be referred to as "RENT"). Payment shall be made to
First Industrial, L.P., P.O. Box 70044, Chicago, IL 60673-0044, or if sent by
overnight courier, First National Bank of Chicago, 7th Floor Mailroom, 525 West
Monroe, Chicago, IL 60661, Attention First Industrial, L.P., Lockbox #70044 (or
such entity designated as Landlord's management agent, if any, and if

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Landlord so appoints such a management agent, the "Agent"), or pursuant to such
other directions as Landlord shall designate in this Lease or otherwise in
writing.

         3. USE OF PREMISES AND COMMON AREAS. Tenant shall use the Premises for
the purpose(s) set forth in SECTION 1.7 above and for no other purpose
whatsoever. As used herein, "Common Areas" shall mean all areas within the
Property that are available for the common use of tenants of the Property and
that are not leased or held for the exclusive use of Tenant or other tenants or
licensees, including, but not limited to, parking areas, driveways, sidewalks,
loading areas, access roads, corridors, landscaping and planted areas. Tenant
shall have the nonexclusive right to use the Common Areas for the purpose
intended, subject to such reasonable rules and regulations as Landlord may
uniformly establish from time to time. Tenant shall not affix any sign of any
size or character to any portion of the Property, without prior written approval
of Landlord.

         4. SECURITY DEPOSIT. Simultaneously with the execution and delivery of
this Lease, Tenant shall deposit with Landlord or Agent the sum set forth in
SECTION 1.8 above, in cash (the "Security"), representing security for the
performance by Tenant of the covenants and obligations hereunder. If Tenant
defaults in the performance of any of its covenants hereunder, Landlord may,
without notice to Tenant, apply all or any part of the Security, to the extent
required for the payment of any Rent or other sums due from Tenant hereunder, in
addition to any other remedies available to Landlord. If the Security is so
applied, Tenant shall, upon demand, immediately deposit with Landlord a sum
equal to the amount so used.

         5. CONDITION OF PREMISES. Tenant agrees that Tenant is familiar with
the condition of both the Premises and the Property, and Tenant hereby accepts
the foregoing on an "AS-IS," "WHERE-IS" basis, without any representation or
warranty from Landlord whatsoever with respect thereto.

         6. SUBORDINATION; ATTORNMENT; ESTOPPEL. Provided that Tenant is
provided with a reasonable and customary subordination, nondisturbance and
attornment agreement duly executed by the holder of any mortgage or deed of
trust or the Landlord pursuant to any ground lease, this Lease shall be subject
and subordinate at all times to any ground lease, mortgage or deed of trust that
may now exist or hereafter be placed upon, and encumber, any or all of the
Property. Notwithstanding the foregoing, Landlord shall have the right to
subordinate or cause to be subordinated any such ground lease, mortgage or deed
of trust liens to this Lease. In addition, Tenant agrees, within 10 days after
request by Landlord, to deliver to Landlord, or Landlord's designee, an estoppel
certificate stating such matters pertaining to this Lease as may be reasonably
requested by Landlord. In the event of a sale or conveyance by Landlord of the
Property, the same shall operate to release Landlord from any future liability
for any of the covenants or conditions, express or implied, herein contained in
favor of Tenant, and in such event Tenant agrees to look solely to Landlord's
successor in interest with respect thereto and agrees to attorn to such
successor.

         7. QUIET ENJOYMENT. Subject to the provisions of this Lease, so long as
Tenant pays all of the Rent and performs all of its other obligations hereunder,
Tenant shall not be disturbed in its possession of the Premises by Landlord or
any other person lawfully claiming through or under Landlord.

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<PAGE>

         8. ASSIGNMENT, SUBLETTING AND MORTGAGING. Tenant shall not, whether
voluntarily, or by operation of law, or otherwise sublet, assign, mortgage,
pledge, encumber, or otherwise hypothecate or transfer this Lease or the
Premises, or any part thereof, in any manner whatsoever.

         9. COMPLIANCE WITH LAWS. Tenant shall, at its sole expense (regardless
of the cost thereof), comply with all local, state and federal laws, rules,
regulations and requirements now or hereafter in force and all judicial and
administrative decisions pertaining thereto (collectively, "LAWS"), pertaining
to either or both of the Premises and Tenant's use and occupancy thereof.

         10. HAZARDOUS MATERIALS. If, during the Term any Hazardous Material
(defined below) is generated, transported, stored, used, treated or disposed of
at, to, from, on or in either or both of the Premises and the Property by, or as
a result of any act or omission of, any or all of Tenant and any or all of
Tenant's Parties (defined below): (i) Tenant shall, at its own cost, at all
times comply (and cause all others to comply) with all laws relating to
Hazardous Materials, including, but not limited to, all Environmental Laws
(defined below), and Tenant shall further, at its own cost, obtain and maintain
in full force and effect at all times all permits and other approvals required
in connection therewith; (ii) Tenant shall promptly provide Landlord with
complete copies of all communications, permits or agreements with, from or
issued by any governmental authority or agency (federal, state or local) or any
private entity relating in any way to the presence, release, threat of release,
or placement of Hazardous Materials on or in the Premises or any portion of the
Property, or the generation, transportation, storage, use, treatment, or
disposal at, on, in or from the Premises, of any Hazardous Materials; (iii)
Landlord, and its respective agents and employees shall have the right to either
or both (x) enter the Premises and (y) conduct appropriate tests for the
purposes of ascertaining Tenant's compliance with all Laws (including
Environmental Laws), rules or permits relating in any way to the generation,
transport, storage, use, treatment, disposal or presence of Hazardous Materials
on, at, in or from all or any portion of either or both of the Premises and the
Property; and (iv) upon written request by Landlord or Agent, Tenant shall
provide Landlord with the results of reasonably appropriate tests of air, water
or soil to demonstrate that Tenant complies with all Laws, rules or permits
relating in any way to the generation, transport, storage, use, treatment,
disposal or presence of Hazardous Materials on, at, in or from all or any
portion of either or both of the Premises and the Property. Tenant covenants to
investigate, clean up and otherwise remediate, at Tenant's sole expense, any
release of Hazardous Materials caused, contributed to, or created by any or all
of (A) Tenant and (B) any or all of Tenant's officers, directors, members,
managers, partners, invitees, agents, employees, contractors or representatives
("TENANT PARTIES") during the Term. Such investigation and remediation shall be
performed only after Tenant has obtained Landlord's prior written consent;
provided, however, that Tenant shall be entitled to respond immediately to an
emergency without first obtaining such consent. All remediation shall be
performed in strict compliance with Environmental Laws and to the reasonable
satisfaction of Landlord. Tenant shall be liable for any and all conditions
covered hereby, and for all costs relating thereto, that are caused or created
by any or all of Tenant and any or all of Tenant's Parties. Tenant shall not
enter into any settlement agreement, consent decree or other compromise with
respect to any claims relating to any Hazardous Materials in any way connected
to the Premises without first obtaining Landlord's written consent (which
consent may be given or withheld in Landlord's sole, but reasonable, discretion)
and affording

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<PAGE>

Landlord the reasonable opportunity to participate in any such proceedings. As
used herein, the term (x) "ENVIRONMENTAL LAWS" shall mean any and all laws
pertaining to Hazardous Materials or that otherwise deal with, or relate to, air
or water quality, air emissions, soil or ground conditions or other
environmental matters of any kind; and (y) "HAZARDOUS MATERIALS" shall mean any
waste, material or substance (whether in the form of liquids, solids or gases,
and whether or not airborne) that is or may be deemed to be or include a
pesticide, petroleum, asbestos, polychlorinated biphenyl, radioactive material,
urea formaldehyde or any other pollutant or contaminant that is or may be deemed
to be hazardous, toxic, ignitable, reactive, corrosive, dangerous, harmful or
injurious, or that presents a risk to public health or to the environment, and
that is or becomes regulated by any Environmental Law.

         11. INSURANCE.

                  11.1 INSURANCE TO BE MAINTAINED BY LANDLORD. Landlord shall
maintain (a) "all-risk" property insurance policy covering the Property (at its
full replacement cost), but excluding Tenant's Property (defined below), and (b)
commercial general public liability insurance covering Landlord for claims
arising out of liability for bodily injury, death, personal injury, advertising
injury and property damage occurring in and about the Property and otherwise
resulting from any acts and operations of Landlord, its agents and employees,
all of the above with limits that are required by any lender(s) of Landlord, or
as are otherwise reasonably determined by Landlord.

                  11.2 INSURANCE TO BE MAINTAINED BY TENANT. Tenant shall
purchase, at its own expense, and keep in force at all times during this Lease
the policies of insurance set forth below in SECTIONS 11.3 and 11.4
collectively, ("TENANT'S POLICIES"). All Tenant's Policies shall (a) be issued
by an insurance company with a Best rating of A-X or better and otherwise
reasonably acceptable to Landlord and shall be licensed to do business in the
state in which the Property is located; (b) provide that said insurance shall
not be canceled or materially modified unless 30 days' prior written notice
shall have been given to Landlord; and (c) otherwise be in such form, and
include such coverages, as Landlord may reasonably require. All Tenant's
Policies (or, at Landlord's option, Certificates of Insurance, in a form
reasonably acceptable to Landlord, evidencing said Tenant's Policies), shall be
delivered to Landlord by Tenant upon commencement of the Lease and renewals
thereof shall be delivered at lease [SIC] 30 days prior to the expiration of
each Tenant's Policy. Tenant shall give prompt notice to Landlord and Agent of
any bodily injury, death, personal injury, advertising injury or property damage
occurring in and about the Property.

                  11.3 GENERAL LIABILITY AND AUTO INSURANCE. Tenant shall
purchase and maintain, throughout the Term, a Tenant's Policy(ies) of (i)
commercial general or excess liability insurance, including personal injury and
property damage, in the amount of not less than $1,000,000.00 per occurrence,
and $3,000,000.00 annual general aggregate, per location; (ii) comprehensive
automobile liability insurance covering Tenant against any losses arising out of
liability for personal injuries or deaths of persons and property damage
occurring in or about the Premises in the amount of not less than $1,000,000.00
combined single limit. The Tenant's Policies required by this SECTION 11.3 shall
(a) name Landlord, Agent, and any party holding an interest to which this Lease
may be subordinated as additional insureds; (b) provide coverage on an
occurrence basis; (c) provide coverage for the indemnity obligations

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of Tenant under this Lease; (d) contain a severability of insured parties
provision and/or a cross liability endorsement; (e) be primary, not contributing
with, and not in excess of, coverage that Tenant may carry; and (f) provide
coverage with no exclusion for a pollution incident arising from a hostile fire.

                  11.4 PROPERTY AND WORKERS' COMPENSATION INSURANCE. Tenant
shall purchase and maintain, throughout the Term, a Tenant's Policy or Policies
of (i) "all-risk" property insurance covering Tenant's Property (at its full
replacement cost), and damage to other property resulting from any acts or
operations of Tenant, and (ii) workers' compensation insurance per the
applicable state statutes covering all employees of Tenant.

                  11.5 WAIVER OF SUBROGATION. To the extent permitted by law,
and without affecting the coverage provided by insurance required to be
maintained hereunder, Landlord and Tenant each waive any right to recover
against the other for (a) damages to property, (b) damages to all or any portion
of either or both of the Premises and the Property, (c) claims arising by reason
of the foregoing, to the extent such damages and claims are insured against, or
required to be insured against, by Landlord or Tenant under this Lease, or (d)
claims paid by Tenant's workers' compensation carrier. This provision is
intended to waive, fully and for the benefit of each party, any rights and/or
claims which might give rise to a right of subrogation by any insurance carrier.
The coverage obtained by each party pursuant to this Lease shall include,
without limitation, a waiver of subrogation by the carrier which conforms to the
provisions of this section.

         12. ALTERATIONS. Tenant may, from time to time, at its expense, make
alterations or improvements in and to the Premises (the "ALTERATIONS"), provided
that Tenant first obtains the written consent of Landlord in each instance.
After obtaining Landlord's consent to Alterations Tenant shall cause the
Alterations to be performed in compliance with all applicable permits, laws and
requirements of public authorities, and with all rules and regulations or any
other restrictions that Landlord or Agent may impose thereon. Tenant shall pay
when due all claims for labor and material furnished to the Premises in
connection with the Alterations and shall not permit any mechanics or
materialmen's liens to attach to the Premises or the Property.

         13. LANDLORD'S AND TENANT'S PROPERTY. All fixtures, machinery,
equipment, improvements and appurtenances attached to, or built into, the
Premises at the commencement of, or during the Term, whether or not placed there
by or at the expense of Tenant, shall become and remain a part of the Premises;
shall be deemed the property of Landlord (the "LANDLORD'S PROPERTY"), and shall
not be removed by Tenant at the Expiration Date unless Landlord requests their
removal. All movable non-structural partitions, business and trade fixtures,
machinery and equipment, communications equipment and office equipment that are
installed in the Premises by, or for the account of, Tenant and without expense
to Landlord and that can be removed without structural damage to the Property,
and all furniture, furnishings and other articles of movable personal property
owned by Tenant and located in the Premises (collectively, the "TENANT'S
PROPERTY") shall be and shall remain the property of Tenant. At or before the
Expiration Date, or the date of any earlier termination, Tenant, at its expense,
shall remove from the Premises all of Tenant's Property and any Alterations
(except such items thereof as constitute Landlord's Property) and Tenant shall
repair any damage to the Premises or the Property resulting from any
installation and/or removal thereof.

                                       5

<PAGE>

         14. REPAIRS AND MAINTENANCE. Tenant shall, at its expense, throughout
the Term maintain and preserve, in first-class condition (subject to normal and
customary wear and tear), the Premises and the fixtures and appurtenances
therein. Landlord shall repair, replace and restore the foundation, exterior and
interior load-bearing walls, roof structure and roof covering and tuckpointing
of the Property; the cost of which shall constitute Operating Expenses.

         15. UTILITIES. Tenant shall purchase all utility services from the
utility or municipality providing such service; shall provide for scavenger,
cleaning and extermination services; and shall pay for such services when
payments are due.

         16. INVOLUNTARY CESSATION OF SERVICES. Landlord reserves the right,
without any liability to Tenant and without affecting Tenant's covenants and
obligations hereunder (including without limitation, the obligation to pay
rent), to stop service of any or all of the HVAC, electric, sanitary, elevator
(if any), or other systems serving the Premises, or to stop any other services
required by Landlord under this Lease, whenever and for so long as may be
necessary by reason of, or the making of, repairs or changes or any other cause
beyond Landlord's reasonable control. In no event shall such interruption of
services be deemed an eviction or disturbance of Tenant's use and possession of
the Premises.

         17. LANDLORD'S RIGHTS. Landlord, and its Agents, employees and
representatives shall have the right to enter and/or pass through the Premises
at any time or times upon reasonable prior notice (except in the event of
emergency): (a) to examine and inspect the Premises; (b) to make such repairs
and improvements in or to the Premises and the Property; (c) to exhibit the
Premises to prospective tenants.

         18. NON-LIABILITY AND INDEMNIFICATION.

                  18.1 Non-Liability. None of Landlord, any other managing
agent, or their respective affiliates, owners, partners, directors, officers,
agents and employees shall be liable to Tenant for any loss, injury, or damage,
to Tenant or to any other person, or to its or their property, irrespective of
the cause of such injury, damage or loss.

                  18.2 Indemnification. Tenant hereby indemnifies, defends, and
holds Landlord, and its affiliates, owners, partners, directors, officers,
agents and employees (collectively, "LANDLORD INDEMNIFIED PARTIES") harmless
from and against any and all claims, demands, expenses, actions, judgments,
damages (whether direct or indirect, known or unkown [SIC] foreseen or
unforeseen), penalties, fines, liabilities, losses, suits, administrative
proceeding costs and fees, including, without limitation attorneys' fees,
arising from or in connection with (a) any act, omission or negligence of any or
all of Tenant and Tenant's Parties; (b) any accident, injury or damage
whatsoever (unless caused by Landlord's negligence) occurring in, at or upon
either or both of the Property and the Premises and caused by any or all of
Tenant and Tenant's Parties; (c) any breach by Tenant of any of its warranties
and representations under this Lease; (d) any actions necessary to protect
Landlord's interest under this Lease in a bankruptcy proceeding or other
proceeding under the Bankruptcy Code; (e) any violation or alleged violation by
any or all of Tenant and Tenant's Parties of any Law including, without
limitation, any Environmental Law; (f) claims for work or labor performed or
materials supplies furnished to or at the request of any or all of Tenant and
Tenant's Parties; (g) claims arising from any breach or default on the

                                       6

<PAGE>

part of Tenant in the performance of any covenant contained in this Lease. The
provisions of this Section 18.2 shall survive the expiration or termination of
this Lease.

         19. FORCE MAJEURE. The obligations of Tenant hereunder shall not be
affected, impaired or excused, and Landlord shall have no liability whatsoever
to Tenant, with respect to any act, event or circumstance arising out of (a)
Landlord's failure to fulfill, or delay in fulfilling any of its obligations
under this Lease by reason of any cause beyond Landlord's reasonable control;
(b) any failure or defect in the supply, quantity or character of utilities
furnished to the Premises; (c) by reason of any requirement, act or omission of
any public utility or others serving the Property, beyond Landlord's reasonable
control.

         20. DAMAGE OR DESTRUCTION. If either or both of the Property and the
Premises is damaged by fire or other insured casualty, Landlord shall have the
option either: (a) to terminate this Lease (by so advising Tenant, in writing)
within 10 days after said destruction or casualty effective as of the date upon
which Tenant receives timely written notice thereof; or (b) to restore and
rebuild the Property and/or the Premises with reasonable dispatch.

         21. EMINENT DOMAIN. If the whole, or any substantial portion, of the
Property is taken or condemned for any public use under any Law or by right of
eminent domain, or by private purchase in lieu thereof, and such taking would
prevent or materially interfere with the Permitted Use of the Premises, this
Lease shall terminate effective when the physical taking of said Premises
occurs. If less than a substantial portion of the Property is so taken or
condemned, this Lease shall not terminate, but the Rent payable hereunder shall
be proportionally abated to the extent of any actual loss of use of the Premises
by Tenant. Landlord shall be entitled to any and all payment, income, rent or
award, or any interest therein whatsoever, which may be paid or made in
connection with such a taking or conveyance.

         22. SURRENDER AND HOLDOVER. On the last day of the Term, or upon any
earlier termination of this Lease, (a) Tenant shall quit and surrender the
Premises to Landlord "broom-clean" and in good order, condition and repair
except for ordinary wear and tear and (b) Tenant shall remove all of Tenant's
Property therefrom, except as otherwise expressly provided in this Lease. If
Tenant remains in possession after the Expiration Date hereof or after any
earlier termination date of this Lease, Tenant shall be deemed a tenant-at-will
terminable upon 30 days' written notice from Landlord shall pay 200% of the
aggregate of the Base Rent and Additional Rent last prevailing hereunder, and
also shall pay all actual damages sustained by Landlord, directly by reason of
Tenant's remaining in possession after the expiration or termination of this
Lease.

         23. EVENTS OF DEFAULT. Each of the following shall constitute a default
by Tenant under this Lease: (a) if Tenant fails to pay Rent or any other payment
when due hereunder; (b) if Tenant fails to timely comply with, or satisfy, and
or all of the obligations imposed on Tenant under this Lease (other than the
obligation to pay Rent) for a period of 30 days after Landlord's delivery to
tenant of written notice of such default provided, however, that if the default
cannot, by its nature, be cured within such 30 day period, but Tenant commences
and diligently pursues a cure of such default promptly within the initial 30 day
cure period, then Landlord shall not exercise its remedies unless such default
remains uncured for more than 60 days after Landlord's initial notice; or (c) if
Tenant makes a general assignment for the benefit of

                                       7
<PAGE>

creditors, a petition under any state or federal bankruptcy or insolvency law if
filed by or against Tenant (unless in the case of a petition filed against
Tenant, the same is dismissed within 30 days after filing), a receiver of
Tenant, or of, or for, the property of Tenant shall be appointed, or Tenant
admits it is insolvent or is not able to pay its debts as they mature.

         24. RIGHTS AND REMEDIES. In the event of any default by Tenant under
this Lease, Landlord, at its option, and after any applicable notice and cure
period but without additional notice or demand from Landlord, if any, as
provided in Section 23 has expired, may, exercise any and all of its rights and
remedies provided in this Lease, as well as any or all rights and remedies
available at law or in equity. Any and all costs, expenses and disbursements, of
any kind or nature, incurred by Landlord in connection with the enforcement of
any and all of the terms and provisions of this Lease, including attorneys'
reasonable fees (through all appellate proceedings), shall be due and payable
(as Additional Rent) upon Landlord's submission of an invoice therefor. All sums
advanced by Landlord on account of Tenant pursuant to any other provision of
this Lease, and all Base Rent and Additional Rent, if delinquent or not paid by
Tenant and received by Landlord when due hereunder, shall bear interest at the
rate of 5% per annum above the "prime" or "reference" or "base" rate (on a per
annum basis) of interest publicly announced as such, from time to time, by the
First Chicago/NBD Bank, from the due date thereof until paid, and such interest
shall be and constitute Additional Rent and be due and payable upon Landlord's
or Agent's submission of an invoice therefor. The various rights, remedies and
elections of Landlord reserved, expressed or contained herein are cumulative and
no one of them shall be deemed to be exclusive of the others or of such other
rights, remedies, options or elections as are now or may hereafter be conferred
upon Landlord by law.

         25. MISCELLANEOUS.

                  25.1 NOTICES. Any notice required to be given by either party
pursuant to this Lease, shall be in writing and shall be deemed to have been
properly given, rendered or made only if personally delivered, or if sent by
Federal Express or other comparable commercial overnight delivery service,
addressed to the other party at the addresses set forth below (or to such other
address as Landlord or Tenant may designate to each other from time to time by
written notice), and shall be deemed to have been given, rendered or made on the
day so delivered or on the first business day after having been deposited with
the courier service:

If to Landlord:         First Industrial, L.P.
                        311 South Wacker Drive, Suite 4000
                        Chicago, IL 60606
                        Attn:  Portfolio Manager

With a copy to:         First Industrial Realty Trust, Inc.
                        7615 Golden Triangle Drive, Suite N
                        Eden Prairie, MN 55344
                        Attn:  Regional Manager

                                        8

<PAGE>

With a copy to:         Barack Ferrazzano Kirschbaum Perlman & Nagelberg, LLC
                        333 West Wacker Drive, Suite 2700
                        Chicago, IL 60606
                        Attn:  Suzanne Bessette-Smith

If to Tenant:           Penta Pure Corporation
                        1000 Apollo Road
                        Eagan, MN 55121
                        Attn:  Andrew Rensink

                  25.2 LEGAL COSTS. Any party in breach or default under this
Lease (the "DEFAULTING PARTY") shall reimburse the other party (the
"NONDEFAULTING PARTY") upon demand for any legal fees and court (or other
administrative proceeding) costs or expenses that the Nondefaulting Party incurs
in connection with the breach or default, regardless whether suit is commenced
or judgment entered including, without limitation, legal fees and costs incurred
for the negotiation of a settlement, enforcement of rights or otherwise.

                  25.3 PARTIES BOUND. Except as otherwise expressly provided for
in this Lease, this Lease shall be binding upon, and inure to the benefit of,
the successors and assignees of the parties hereto. The liability of Landlord to
Tenant hereunder shall be limited to the interest of Landlord in the Property,
and Tenant agrees to look solely to Landlord's interest in the Property for the
recovery of any judgment or award against Landlord, it being intended that
Landlord shall not be personally liable for any judgment or deficiency.

                  25.4 RECORDATION OF LEASE. Tenant shall not record or file
this Lease (or any memorandum hereof) in the public records of any county or
state.

                  25.5 SURVIVAL OF OBLIGATIONS. Upon the expiration or other
termination of this Lease, neither party shall have any further obligation nor
liability to the other except as otherwise expressly provided in this Lease and
except for such obligations as, by their nature or under the circumstances, can
only be, or by the provisions of this Lease, may be performed after such
expiration or other termination.

                  25.6 Governing Law; Counterparts. This Lease shall be governed
by and construed in accordance with the laws of the state in which the Property
is located. If any provision of this Lease shall be invalid or unenforceable,
the remainder of this Lease shall not be affected but shall be enforced to the
extent permitted by law. This Lease may be executed in counterpart and, when all
counterpart documents are executed, the counterparts shall constitute a single
binding instrument.

                  25.7 TIME. Time is of the essence of this Lease. If the time
for performance hereunder falls on a Saturday, Sunday or a day that is
recognized as a holiday in the state in which the Property is located, then such
time shall be deemed extended to the next day that is not a Saturday, Sunday or
holiday in said state.

                  25.8 WAIVER OF TRIAL BY JURY. THE LANDLORD AND THE TENANT, TO
THE FULLEST EXTENT THAT THEY MAY LAWFULLY DO SO, HEREBY

                                       9

<PAGE>

WAIVE TRIAL BY JURY IN ANY ACTION OR PROCEEDING BROUGHT BY ANY PARTY TO THIS
LEASE WITH RESPECT TO THIS LEASE, THE PREMISES, OR ANY OTHER MATTER RELATED TO
THIS LEASE OR THE PREMISES.

                  25.9 RIDERS. All Riders and Exhibits attached hereto and
executed (or initialed) both by Landlord and Tenant shall be deemed to be a part
hereof and hereby incorporated herein.

                  25.10 OTHER PROVISIONS. The following are made a part hereof
with the same force and effect as if specifically set forth herein.

                  1. Premises and Property - Exhibit A
                  2. Floor Plan - Exhibit A-1
                  3. Legal Description - Exhibit B
                  4. Repairs and Improvements - Exhibit C
                  5. Building Rules and Regulations - Exhibit D
                  6. Tenant Operations Inquiry - Exhibit E

                           [Signature Page to follow]

                                       10

<PAGE>

         IN WITNESS WHEREOF, Landlord and Tenant have duly executed this Lease
as of the day and year first above written.

                               LANDLORD:

                               FIRST INDUSTRIAL, L.P., a Delaware
                               limited partnership

                               By:      First Industrial Realty Trust, Inc., a
                               Maryland corporation, its general partner

                               By:      /s/ Chris Willson
                                        ----------------------------------------

                               Name:    Chris Willson
                                        ----------------------------------------

                               Its:     Regional Director
                                        ----------------------------------------

                               ADDRESS:

                               First Industrial Realty Trust, Inc.
                               7615 Golden Triangle Drive
                               Suite N
                               Minneapolis, MN 55344

                               TENANT:

                               PENTA PURE CORPORATION, a Minnesota corporation

                               By:      /s/ Andrew Rensink
                                        ----------------------------------------

                               Name:    Andrew Rensink
                                        ----------------------------------------

                               Its:      VP - Operations
                                        ----------------------------------------

                               ADDRESS:

                               1000 Apollo Road
                               Eagan, MN  55121

                                       11

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