Document:

SECOND AMENDMENT TO AGREEMENT

      This Second Amendment to Second Amended and Restated Agreement
("Amendment") is entered into as of February 10, 2004, in Santa Ana, California
by and between Valley Springs Mineral, LLC, a Nevada limited liability company
("Valley Springs") and VitroCo Incorporated, a Nevada corporation ("VitroCo"),
assignee from Hi-Tech Environmental Products, LLC, a Nevada limited liability
company ("Hi-Tech") and amends that certain Agreement dated as of April 5, 2002,
as amended by a First Amendment dated February 2, 2004 ("Agreement").
Capitalized terms which are not defined herein are used as they are defined in
the Agreement. In the case of any conflict between this Amendment and the
Agreement, the terms of the Amendment shall control.

      1. For the calendar year 2004, Valley Springs hereby waives the obligation
of VitroCo to purchase Mineral in amounts at least equal to the Minimum
Requirements, as provided in paragraph 3 of the First Amendment (i.e., the
purchase by VitroCo of Mineral in amounts at least equal to the Minimum
Requirements due February 29, 2004, June 30, 2004, September 30, 2004 and
December 15, 2004). The foregoing waiver shall not affect VitroCo's obligations
to pay for any Mineral actually purchased by VitroCo, as provided in the
Agreement. The obligation of VitroCo to Mineral in amounts at least equal to the
Minimum Requirements for periods after calendar year 2004 remains in full force
and effect. Any Mineral actually purchased by Hi-Tech from Valley Springs prior
to February 3, 2004 shall not apply to the purchase by VitroCo of Minerals in
amounts at least equal to the Minimum Requirements due December 1, 2005.

      2. Except as provided herein, the Agreement remains unmodified and in full
force and effect.

      In witness whereof, this Amendment was executed as of the date first
written above.

VALLEY SPRINGS:                                      VITROCO:

VALLEY SPRINGS MINERAL, LLC,                         VITROCO INCORPORATED,
a Nevada limited liability company                   a Nevada corporation

By:      Jess Rae Booth                             By:      Jess Rae Booth
Its:     Chairman/Manager                           Its:     CEO and President

                                                    By:      Kristin Johnston
                                                    Its:     Secretary

                                       1
<PAGE>

                          FIRST AMENDMENT TO AGREEMENT

      This First Amendment to Agreement ("Amendment") is entered into as of
February 3, 2004, in Santa Ana, California by and between Valley Springs
Mineral, a California limited liability company ("VALLEY SPRINGS") and Hi-Tech
Environmental Products, LLC, a Nevada limited liability company ("Hi-Tech") and
amends that certain Agreement dated as of April 5, 2002 ("Agreement").
Capitalized terms which are not defined herein are used as they are defined in
the Agreement. In the case of any conflict between this Amendment and the
Agreement, the terms of the Amendment shall control.

      1. A new paragraph 12 is hereby added to the Agreement to read as follows:

            "Right to Assign. VALLEY SPRINGS shall have the right to assign all
of its rights and obligations under this Agreement without the approval of
Hi-Tech. Hi-Tech shall have the right to assign its rights and obligations under
this Agreement to any Affiliate without the approval of VALLEY SPRINGS. Any
assignment which is not to an Affiliate shall be subject to the approval of
VALLEY SPRINGS, which may be withheld in VALLEY SPRINGS' reasonable discretion.
For purposes of this Agreement, The term "Affiliate" shall mean: any person or
entity which, directly or indirectly, through one or more intermediaries,
controls the contracting party or is controlled by the contracting party or is
under common control with persons who control the contracting party. The term
control, as used herein, means the possession, direct or indirect, of the power
to (i) vote 51% or more of the outstanding voting securities of such person or
entity; or (ii) otherwise direct management policies of such person by contract
or otherwise. No such assignment shall relieve the assigning party of any
liability under this Agreement. Any assignee of Hi-Tech's obligations, whether
an Affiliate or otherwise, shall execute such document reasonably required by
VALLEY SPRINGS to confirm that the assignee is assuming all of Hi-Tech's
obligations under the Agreement."

      2. A new paragraph 13 is hereby added to the Agreement to read as follows:

            "Non-Competition. Hi-Tech hereby agrees that until such time as
seventy five percent (75%) of the Mineral located on the Property is purchased
by Hi-Tech from VALLEY SPRINGS, and VALLEY SPRINGS receives payment therefore,
neither Hi-Tech nor any Affiliate will sell or otherwise distribute any other
product into the plastics or paint/coatings industries which is the same or
similar to the Mineral. For purposes of this paragraph 14, "same or similar"
includes both natural and man-made products which are an amorphous
aluminosilicate, or which act in a same or similar fashion to the Mineral (for
example, acts in accordance with the information contained in any patent
application now existing or filed in the future, whether or not such patent is
ever granted), or which Hi-Tech or an Affiliate sells or distributes to
distributors or customers in lieu of the Mineral. Hi-Tech has pre-existing
agreements with Enviro Investment Group, LLC ("EIG") and Red Rock Canyon
Mineral, LLC to mine and market for sale mineral which is substantially the same
as the Mineral owned by VALLEY SPRINGS. Hi-Tech may also enter into similar
agreements with other entities for additional mineral properties, provided that
the owner(s) of those properties consist of substantially the same individuals
who are the members of EIG, Red Rock and/or Valley Springs Mineral, LLC. The
foregoing are collective referred to as "Affiliated Mineral Entities". Mining
and marketing for sale of Mineral from any Affiliated Mineral Entity shall not
be deemed to be a breach of this paragraph 2.

            If Hi-Tech locates properties with additional Mineral which is not
owned by Affiliated Mineral Entities (including properties which Hi-Tech may
purchase directly), then Hi-Tech shall have the right to mine from those
properties only sufficient Mineral to keep mining permits in full force and
effect, without being deemed to be in violation of this paragraph 13.

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<PAGE>

            This paragraph 3 is hereby deemed to amend paragraph 6 of the
Agreement."

      3. A new paragraph 14 is hereby added to the Agreement to read as follows:

            "Minimum Requirements - On or before the specific dates set forth
below, Hi-Tech shall purchase from VALLEY SPRINGS at least the following minimum
quantities of Mineral. For purposes of the Minimum Requirements, "purchase"
shall mean payment actually received by VALLEY SPRINGS on or before the
below-mentioned dates, irrespective of any other provision in the Agreement
which provides that Hi-Tech is only obligated to pay VALLEY SPRINGS upon sale by
Hi-Tech of the Mineral and receipt of the purchase price from its customer. If
Hi-Tech fails to do so, then Hi-Tech shall be in default under this Agreement,
as provided below. Any purchases in excess of the applicable minimums made
between respective purchase dates shall be applicable to the next purchase date.

         Purchase Date                               Amount in Pounds
         -------------                               ----------------

         February 29, 2004                               500,000
         June 30, 2004                                   250,000
         September 30, 2004                              500,000
         December 15, 2004                               750,000
         December 1, 2005                              7,500,000
         December 1, 2006                             10,000,000
         December 1, 2007                             12,500,000
         December 1, 2008                             15,000,000
         Each December 1 thereafter                   ten percent
                                                      (10%) in excess
                                                      of the prior
                                                      year's Minimum
                                                      Requirement

            Any Mineral actually purchased by Hi-Tech from VALLEY SPRINGS prior
to January 1, 2004 shall not apply to the Minimum Requirements due February 29,
2004.

            Any Mineral purchased from any Affiliated Mineral Entity shall be
credited against the Minimum Requirement hereunder."

      4. Paragraph 10 of the Agreement entitled "Termination" is hereby amended
in its entirety to read as follows:

            "Default. Hi-Tech shall be in default under this Agreement ("Event
of Default") if any of the following shall occur:

            a. The failure by Hi-Tech to perform any monetary obligation under
this Agreement, which failure is not cured within fifteen (15) business days
after receipt of written notice from VALLEY SPRINGS;

            b. The failure by Hi-Tech to perform any non-monetary obligation
under this Agreement, which failure is not cured within ten (10) business day
after receipt of written notice from VALLEY SPRINGS, except that if such
non-monetary failure cannot be reasonably cured within such ten (10) business
day period, Hi-Tech shall not be in default hereunder if it commences to cure
such failure within the ten (10) business day period, and thereafter completes
such cure with all due diligence;

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<PAGE>

            c. i) The making by Hi-Tech of any general arrangement or assignment
for the benefit of creditors; (ii) Hi-Tech becomes a "debtor" as defined in 11
U.S.C. 101 or any successor statute thereto (unless, in the case of petition
filed against Hi-Tech, the same is dismissed within sixty (60) days); (iii) the
appointment of a trustee or receiver to take possession of substantially all of
Hi-Tech's assets, where possession is not restored to Hi-Tech within sixty (60)
days; or (iv) the attachment, execution or other judicial seizure of
substantially all of Hi-Tech's assets, where such seizure is not discharged
within sixty (60) days;

            d. A breach of the provisions of paragraph 2 above, which shall not
be subject to cure by Hi-Tech;

            e. The failure by Hi-Tech to timely purchase the Minimum
Requirements provided for in paragraph 3 above, which shall not be subject to
cure by Hi-Tech;

            f. A default by Hi-Tech under any of the Agreements with the
Affiliated Mining Companies; or

            g. A default by VitroCo Materials, LLC under that certain Royalty
Agreement with Hi-Tech being executed concurrently herewith.

            Upon an Event of Default, VALLEY SPRINGS shall have all rights and
remedies available to it at law or in equity, including but not limited to the
immediate right to terminate this Agreement. Any sum which is not paid when due
shall bear interest at the maximum rate permitted by applicable law. No previous
waiver and no failure or delay by VALLEY SPRINGS in acting with respect to the
terms of this Agreement, shall constitute a waiver of any breach, default, or
failure of condition under this Agreement. Upon such termination of this
Agreement, Hi-Tech shall no longer have the right to mine any Mineral from the
Property, nor market for sale any Mineral previously mined from the Property and
not yet sold to a distributor or customer.

            Upon an Event of Default and election by VALLEY SPRINGS to terminate
this Agreement, or any other termination of this Agreement, voluntary or
involuntary, VALLEY SPRINGS shall have the right, but not the obligation, to
contract with any employee or independent contractor of Hi-Tech, notwithstanding
any provision in any employment agreement or independent contractor agreement
which would otherwise limit such employee's or independent contractor's right to
contract with a competitor of Hi-Tech's. Hi-Tech hereby agrees to automatically
waive, without any additional documentation, any non-competition or similar
provision in any employment agreement or independent contractor agreement.

                  For determining the obligations attendant to a decision by
Hi-Tech, or its successors or assigns, to assume this contract pursuant to 11
U.S.C. Section 365, each and every provision contained in this document shall be
deemed non-severable, and this document, together with each of the following
documents, shall be deemed integral and non-severable and parts of a single
executory contract: (i) the Agreement between Red Rock Canyon Mineral, LLC and
Hi-Tech, (ii) the Agreement between Enviro Investment Group, LLC and Hi-Tech,
and (iii) the Royalty Agreement between Hi-Tech and VitroCo Materials, LLC."

                                       4
<PAGE>

      5. License of Mineral Technology. Concurrently herewith, Hi-Tech hereby
grants a present license to VALLEY SPRINGS, on a non-terminable, world-wide,
non-exclusive basis, royalty free and paid up, in perpetuity,, all technology,
know how and information which relates to the use of the Mineral, whether
created before or after the date of this Amendment ("Mineral Technology"). The
form of the license agreement is attached hereto as Exhibit A.

      6. A new paragraph 16 is hereby added to the Agreement to read as follows:

            "Indemnity. Hi-Tech represents and warrants that it is fully
familiar with the Mineral, that it has, and will continue, to perform research
and development relating to the Mineral and its application in various
industries. VALLEY SPRINGS has none of the foregoing expertise. Hi-Tech
indemnifies, defends, protects and holds harmless VALLEY SPRINGS, its manager,
members, successors and assigns, from any and all liabilities, losses, claims,
demands and expenses (including attorneys' fees, court costs and litigation
expenses) arising from Hi-Tech's obligations under this Agreement, the Mineral
generally, the mining, milling and sale of the Mineral, and claims from third
parties, including but not limited to distributors, purchasers or end users of
products containing Mineral (collectively, "Claims"), whether or not such
Claims, or any action or inaction which gave rise to a Claim, occurred before or
after this Agreement."

      7. A new paragraph 16 is hereby added to the Agreement to read as follows:

            "As is and Where is. HI-TECH ACKNOWLEDGES AND AGREES THAT THE
TRANSACTION CONTEMPLATED HEREBY SHALL BE AS IS, WHERE IS WITHOUT ANY WARRANTY OR
REPRESENTATION OF TITLE, EITHER EXPRESS, IMPLIED, STATUTORY OR OTHERWISE, AND
WITHOUT ANY EXPRESS, IMPLIED, STATUTORY OR OTHER WARRANTY OR REPRESENTATION AS
TO THE CONDITION, QUANTITY, QUALITY, FITNESS FOR A PARTICULAR PURPOSE, FREEDOM
FROM REDHIBITORY VICES OR DEFECTS, AND THAT ANY AND ALL INFORMATION THAT HI-TECH
HAS RECEIVED OR MAY RECEIVE FROM VALLEY SPRINGS OR ITS MANAGERS, MEMBERS,
OFFICERS, EMPLOYEES, CONSULTANTS OR AGENTS ("VALLEY SPRINGS' AGENTS") IS AND
SHALL BE FURNISHED TO HI-TECH WITHOUT WARRANTY OR REPRESENTATION BY VALLEY
SPRINGS OF ANY KIND, AND FURTHER THAT SUCH INFORMATION HAS AND WILL BE ACCEPTED
BY HI-TECH ON THE EXPRESS CONDITION THAT HI-TECH SHALL MAKE ITS OWN INDEPENDENT
VERIFICATION OF THE ACCURACY AND COMPLETENESS THEREOF. NEITHER HI-TECH NOR ITS
SUCCESSORS OR ASSIGNS SHALL ASSERT OR SEEK TO IMPOSE ANY CLAIM, LIABILITY, OR
OBLIGATION ON VALLEY SPRINGS ARISING OUT OF ANY INACCURACY OR INCOMPLETENESS OF
ANY INFORMATION FURNISHED TO HI-TECH BY VALLEY SPRINGS OR VALLEY SPRINGS'
AGENTS, AND HI-TECH, ITS SUCCESSORS AND ASSIGNS DO HEREBY RELINQUISH AND WAIVE
ALL SUCH CLAIMS, LIABILITIES AND OBLIGATIONS. NO PERSON ACTING ON BEHALF OF
VALLEY SPRINGS IS AUTHORIZED TO MAKE, AND BY EXECUTION HEREOF HI-TECH
ACKNOWLEDGES THAT NO SUCH PERSON HAS MADE, TO HI-TECH ANY REPRESENTATION,
WARRANTY, GUARANTEE OR PROMISE, WHETHER ORAL OR WRITTEN, REGARDING THE
AGREEMENTS OR ANY MATTERS RELATING TO THE AGREEMENTS OR TO THIS AGREEMENT OR THE
SUBJECT MATTER HEREOF, EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, AND ANY

                                       5
<PAGE>

SUCH REPRESENTATION, WARRANTY, GUARANTEE OR PROMISE HERETOFORE OR HEREAFTER MADE
BY ANY PERSON WHICH IS NOT CONTAINED HEREIN SHALL NOT BE VALID OR BINDING UPON
VALLEY SPRINGS. HI-TECH ACKNOWLEDGES THAT VALLEY SPRINGS HAS EXPRESSLY
DISCLAIMED AND MADE NO WARRANTIES AS TO MERCHANTABILITY OF THE UNDERLYING
PROPERTIES, THE MINERALTHE MARKETABILITY THEREOF OR ITS SUITABILITY OR FITNESS
FOR ANY PARTICULAR USE. HI-TECH REPRESENTS AND WARRANTS TO VALLEY SPRINGS THAT
HI-TECH HAS MADE ITS OWN EXAMINATION, INSPECTION AND INVESTIGATION OF THE
UNDERLYING PROPERTY AND THE MINERAL WHICH IS THE SUBJECT MATTER THEREOF, AND ALL
MATTERS AS IT DEEMS NECESSARY OR APPROPRIATE. HI-TECH IS ENTERING INTO THIS
AGREEMENT BASED UPON THE RESULTS OF SUCH INSPECTIONS AND INVESTIGATIONS AND NOT
IN RELIANCE ON ANY STATEMENT, REPRESENTATION OR AGREEMENTS OF VALLEY SPRINGS NOT
CONTAINED IN THIS AGREEMENT. HI-TECH IS PURCHASING THE MINERAL IN ITS "AS IS"
AND "WHERE IS" CONDITION AND SUBJECT TO ANY AND ALL DEFECTS."

         8. A new paragraph 17 is hereby added to the Agreement to read as
follows:

                  "Notice. Any notice which either party may desire to give to
the other party must be in writing and may be given by personal delivery, air
courier or by mailing the same by registered or certified mail, return receipt
requested (or by telecopy or e-mail if followed by one of the foregoing
methods), to the party to whom the notice is directed at the address of such
party hereinafter set forth, or such other address as the parties may hereafter
designate:

           If to Valley Springs:     Valley Springs Mineral, LLC
                                     5 Hutton Centre Drive
                                     Suite 700
                                     Santa Ana, CA 92707
                                     Attn:  Mr. Jess Rae Booth, Chairman Manager
                                     Telecopy No. (714) 708-4701

           If to Hi-Tech             Hi-Tech Environmental Products
                                     5 Hutton Centre Drive
                                     Suite 700
                                     Santa Ana, CA 92707
                                     Attn:  Mr. Jess Rae Booth, President
                                     Telecopy No. (714) 708-4701

      9. A new paragraph 18 is hereby added to the Agreement to read as follows:

            "Insurance. Hi-Tech shall maintain such types and amounts of
insurance as are reasonable and customary for the business proposed to be
conducted on the Property, and shall name VALLEY SPRINGS as an additional
insured on all such policies."

      10. A new paragraph 19 is hereby added to the Agreement to read as
follows:

            "Net Payments. All payments due Valley Springs shall not be reduced
by any taxes, whether sales, use, ad valorum or otherwise, fees or other
obligations, including royalties to third parties (all of which shall be the
obligation of Hi-Tech), other than the payment by Valley Springs' members of
income tax, which shall be paid by Valley Springs' members.

      11. Paragraph 7 of the Agreement is hereby amended by adding the following
at the end thereof:

            "Upon the request of VALLEY SPRINGS, Hi-Tech agrees to provide an
estoppel certificate, stating that this Agreement is unmodified and in full
force and effect, whether any defaults exist by either party."

      12. No Other Modifications. Except as provided herein, the Agreement
remains unmodified and in full force and effect.

                                       6
<PAGE>

      In witness whereof, this Amendment was executed as of the date first
written above.

VALLEY SPRINGS:                             HI-TECH:

VALLEY SPRINGS MINERAL, LLC,                HI-TECH ENVIRONMENTAL PRODUCTS, LLC
a Nevada limited liability company          a Nevada limited liability company

By:____________________________             By:_______________________________

         Its:______________________         Its:_________________________

                                       7
<PAGE>

                                    Exhibit A
                            Form of License Agreement

                                       8THE SECURITIES REPRESENTED BY THIS INSTRUMENT HAVE NOT BEEN REGISTERED UNDER THE
SECURITIES ACT OR THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE SOLD, PLEDGED,
HYPOTHECATED OR OTHERWISE TRANSFERRED, EXCEPT UPON DELIVERY TO VITROCO OF AN
OPINION OF COUNSEL, SATISFACTORY TO VITROCO, THAT AN EXEMPTION FROM SUCH
REGISTRATION IS AVAILABLE AND THAT SUCH TRANSFER WILL NOT RESULT IN ANY
VIOLATION OF THE LAW. TRANSFER OF THE NOTES IS SUBJECT TO ADDITIONAL LIMITATIONS
CONTAINED IN THE NOTES.

                        NO. ___________$ _______________

                                     VITROCO

                                 10% NONRECOURSE
        PROMISSORY NOTE DUE DECEMBER 31, 2004 UNLESS EXTENDED BY VITROCO

Name of Registered Holder(s):

The principal sum of the Promissory Note is ______________________ Dollars (U.S.
Dollars), (the "Principal Amount").

For value received, the undersigned, Hi-Tech Environmental Products, LLC d/b/a
VitroCo, a Nevada limited liability company ("VitroCo"), promises to pay to the
Holder hereof the Principal Amount and interest as set forth herein. The
Principal Amount shall be payable on December 31, 2004 (the "Due Date" or
"Maturity Date"). THE MATURITY DATE MAY BE EXTENDED ONE TIME FOR A PERIOD OF
TWELVE (12) MONTHS PROVIDED VITROCO NOTIFIES HOLDER IN WRITING OF VITROCO'S
INTENTION TO EXTEND THE MATURITY DATE AT LEAST THIRTY (30) DAYS BEFORE THE
INITIAL MATURITY DATE. In consideration for the extension, VitroCo shall pay
Holder at the time of and with the notice all interest then accrued but unpaid
plus an advance of the interest due from the period of the notice through the
date of the initial Maturity Date.

The Principal Amount shall accrue simple interest at the rate of ten percent
(10%) per annum (based on a 365-day year and actual days elapsed) from the date
on which this Note is issued ("Current Interest") and may earn Contingent
Interest (as defined below). All Current Interest shall be payable quarterly in
arrears on or before the 10th day of the month following the last day of each
calendar quarter. This Note may be paid, in whole or in part, without premium or
penalty prior to the Maturity Date, as VitroCo in its sole discretion may
choose; however, all amounts paid from time to time by VitroCo to the Holder
shall be applied first to any accrued but unpaid Current Interest, then to
Principal and then as a credit against any accrued Contingent Interest.

VitroCo promises to pay to the Holder hereof, as additional interest on this
Note, an amount calculated as set forth hereinafter (the "Contingent Interest").
Each Holder of this Note shall receive as Contingent Interest a pro rata share
of an amount equal to seven cents ($0.07) per pound of Mineral sold, if any, by
VitroCo for the first 500,000,000 pounds sold beginning on the later of (1)
February 24, 2003 or (2) the first day of the calendar quarter in which the
subscription for this Note is accepted. "Pro rata", as it relates to each
Noteholder, shall mean a fraction, the numerator of which is the Principal
Amount of each Noteholder's loan to VitroCo and the denominator of which is Five
Million Dollars ($5,000,000). "Sold" is defined as the amount of Mineral sold in
any three (3) month calendar quarter from the operations of the Company. Mineral
shall be deemed "sold" at such time as VitroCo actually receives the proceeds of
the sale of the Mineral. The Contingent Interest amount will be based only on
the amount of pounds of the Mineral sold.

<PAGE>

Minerals subject to Contingent Interest payments consist of all products derived
from amorphous aluminosilicate and sold by VitroCo to non-affiliated third
parties. No Contingent Interest will be paid with respect to "Excluded
Minerals". For purposes hereof, "Excluded Minerals" shall consist of all sales
of Minerals outside of the ordinary course of business including but not limited
to Minerals sold: (1) pursuant to the December 31, 2001 agreement whereby
VitroCo agreed to redeem the interest of Hexon Trust in VitroCo in exchange for
(a) 200,000 pounds of processed Mineral, (b) the future transfer of 20,000,000
pounds of Mineral to be mined from an 18 acre property in Calaveras County,
California, and (c) the right to acquire 20,000,000 pounds of Mineral under
certain conditions for cost plus twenty percent (20%); (2) pursuant to the
December 2001 agreement whereby Enviro LLC agreed to redeem Mineral Equities
Trust's 52.5% membership interest in Enviro LLC in exchange for an agreement on
the part of Enviro LLC and VitroCo to mine and sell to Mineral Equities Trust
100,000,000 pounds of Mineral at VitroCo's cost plus twenty percent (20%); and
(3) to Alpha pursuant to the March 6, 2002 agreement whereby Alpha agreed to
convey to Valley Springs LLC, as successor to Alliance, all of the Mineral
rights relating to the Valley Springs Property, subject to the rights of Alpha
to acquire up to 50% of the Minerals mined from the Valley Springs Property at
cost (including certain overhead) plus five percent (5%).

CONTINGENT INTEREST, IF ANY, SHALL BE PAYABLE TO THE HOLDER QUARTERLY IN ARREARS
ON OR BEFORE THE 10TH DAY FOLLOWING THE LAST DAY OF EACH CALENDAR QUARTER. THE
PAYMENT OF CONTINGENT INTEREST SHALL CONTINUE EVEN THOUGH THE PRINCIPAL AMOUNT
OF THE NOTE HAS BEEN REPAID AND THE TIME OF THE CONTINGENT INTEREST PAYMENT IS
SUBSEQUENT TO THE MATURITY DATE OF THE NOTE.

The Principal Amount, Current Interest, and Contingent Interest on this Note are
payable in the lawful money of the United States of America at the time payment
is made. This Note is not transferable, unless the Notes are subsequently
registered under the Securities Act of 1933, as amended (the "Securities Act"),
and qualified under applicable state Securities laws. Unless registered under
the Securities Act and qualified under applicable state Securities laws, this
Note is only transferable pursuant to an exemption therefrom, after delivery of
an opinion of counsel satisfactory to VitroCo that such registration and
qualification is not required. If the Note is transferable as provided above,
upon surrender of this Note for transfer at the office of VitroCo, VitroCo will
issue one or more new Notes of authorized denominations and for a like aggregate
principal amount to the designated transferee or transferees. No service charge
will be made for any such registration, transfer or exchange, but VitroCo may
require payment of an amount sufficient to cover any tax or other governmental
charge payable in connection therewith. Prior to presentment of a Note for
registration, transfer or exchange, VitroCo and any agent of VitroCo may treat
the person in whose name the Note is registered on the Note Register as the
owner thereof for the purpose of distributing payments of the Principal Amount,
Current Interest and/or Contingent Interest and for all other purposes, and
neither VitroCo nor any agent shall be affected by notice to the contrary.

Any person purchasing or otherwise receiving an interest in this Note is
cautioned to contact the office of VitroCo in order to determine the validity of
the transfer and the amount, if any, of accrued but unpaid Current Interest, at
any time and from time to time outstanding.

<PAGE>

This Note and the other Notes issued in connection with the Offering are
initially issuable only in registered form without coupons and in minimum
denominations of Twenty-five Thousand Dollars ($25,000) (unless VitroCo allows a
smaller denomination) or in any increments of one thousand dollars ($1,000) as
are approved by VitroCo.

This Note has been executed by an authorized representative of VitroCo, as such
representative and not individually, and the covenants and obligations contained
in this Note are not binding personally upon any of VitroCo's Members, Manager,
officers, employees, consultants, agents, attorneys, assignees, or executors of
its estate, but bind only VitroCo. No recourse shall be had for the payment of
the Principal Amount, accrued Current Interest or Contingent Interest on this
Note personally against VitroCo's Members, Manager, officers, employees,
consultants, agents, attorneys, assignees, or executors of its estate, past,
present or future as such or of any predecessor or successor of VitroCo or any
such other person whether by virtue of any statute or rule of law or equity or
by the enforcement of any assessment or penalty or otherwise, all such liability
being, by the acceptance and as part of the consideration for the issuance
hereof, expressly waived and released by every Holder or owner of record.

Upon the occurrence of any of the following events, and following twenty (20)
days written notice by Holder or its representative during which period VitroCo
shall have the opportunity to cure such default, the Holders of Notes
representing more than fifty percent (50%) of the outstanding principal balance
of the Notes may declare the Principal Amount, accrued but unpaid Current
Interest and all other obligations evidenced by the Notes immediately due and
payable without further demand or notice of default, nonpayment or dishonor:

         A. VitroCo's failure to pay when due any amount under the Notes.

         B. Any warranty, representation or statement made in the Offering
Memorandum, pursuant to which VitroCo offered the Notes, or furnished in writing
to the Holders of Notes by VitroCo or on behalf of VitroCo by those authorized
by VitroCo to furnish such information, shall have been false or untrue in any
material respect when made or furnished.

         C. VitroCo shall be unable or shall admit in writing its inability to
generally pay its debts when due, or shall make a general assignment for the
benefit of creditors; or shall apply for or consent to the appointment of any
receiver, trustee or similar officer for VitroCo or for all or a substantial
part of its property; or VitroCo shall institute (by petition, application,
answer, consent or otherwise) any bankruptcy, insolvency, reorganization,
arrangement, readjustment of debts, dissolution, liquidation, or similar
proceedings relating to VitroCo under the laws of any jurisdiction, provided
such is not dismissed within ninety (90) days of the filing, or the taking of
action by VitroCo in furtherance of the foregoing.

         D. The appointment of a receiver, trustee or similar officer for
VitroCo, or for all or any substantial part of its property without the
application or consent of VitroCo, and such appointment shall continue
undischarged for a period of ninety (90) consecutive days; or any bankruptcy,
insolvency, reorganization, arrangement, readjustment of debt, dissolution,
liquidation or similar proceedings shall be instituted (by petition, application
or otherwise) against VitroCo and shall remain undismissed for a period of
ninety (90) consecutive days.

         E. Should VitroCo be dissolved by operation of law.

         F. Should VitroCo default in prompt and full payment or performance
when due (by acceleration or otherwise) in connection with material obligations
due a third party and such third party shall declare a default that continues
beyond any permissible cure period provided for in such arrangements with such
third party. VitroCo may elect in good faith to contest any such obligation or
such payment on, or performance of, such obligation, in which event VitroCo may
permit such item to remain unsatisfied and undischarged during the period of
such contest and appeal therefrom.

                                       11
<PAGE>

       G. If there is a breach of any other material term, covenant, or
condition of the Note.

Upon the occurrence of any event of default, the Holders shall be unsecured
creditors of VitroCo. In such event, the Holders shall have the option to
proceed in exercising their rights against VitroCo to the extent permitted by
law and may exercise their rights in any manner as may seem most expedient at
the time.

Except as otherwise provided in this Note, VitroCo and all others who may become
liable for all or any part of the obligation under the Notes severally waive
presentment for payment, demand, notice of nonpayment, notice of dishonor,
protest of any dishonor, notice of protest and protest of this Note, and all
other notices in connection with the delivery, acceptance, performance, default
or enforcement of the payment of this Note, and agree that their liability shall
be unconditional and shall not be in any manner affected by any indulgence,
extension of time, renewal, waiver or modification granted or consented to by
the Holders. VitroCo and all others who may become liable for all or any part of
the obligation under the Notes further consent to every extension of time,
renewal, waiver or modification that may be granted by the Holders with respect
to the payment or other provisions of this Note.

Acceptance by the Holder hereof of a payment after its due date shall not waive
the right of the Holder to require prompt payment as and when date of any and
all other payments hereunder or of the right to the Holder hereof to declare a
default for the failure of the undersigned to so pay.

No single or partial exercise of any power hereunder shall preclude other or
further exercise thereof or the exercise of any other power. No delay or
omission on the part of the Holder hereof in exercising any right hereunder
shall operate as a waiver of such right or any other right under this Note.

Notwithstanding the foregoing, it is the intention of VitroCo and Holders to
comply with all applicable usury laws. In furtherance of this intention of
Holders and VitroCo, all agreements between VitroCo and Holders are expressly
limited so that in no contingency or event whatsoever shall the amount paid or
agreed to be paid to Holders, for the use, forbearance, or detention of money
under this Note, exceed the maximum amount permissible under applicable law. If,
due to any circumstance, payment of any amount required under this Note shall be
prohibited by law, the obligation to be fulfilled shall be reduced to the
maximum allowed by law. If, due to any circumstance, Holders should ever receive
as interest an amount which would exceed the highest lawful rate, the amount
that would be excessive interest shall either be applied to the reduction of the
principal of this Note and not to the payment of interest or refunded if
principal has been paid in full. This provision shall control every other
provision of all agreements between VitroCo and Holders.

Time is of the essence of this Note.

If this Note is not paid at maturity, whether by acceleration or otherwise, all
amounts due hereunder shall continue to bear interest, until paid in full, at
the rate of ten percent (10%) per annum.

<PAGE>

VitroCo shall be required to pay a late charge equal to five percent (5%) of the
amount of any late payment to compensate the Holders for any damage caused by
VitroCo's delay in making such payments and the expense of the Holders in
collecting such payment for any payment that is more than twenty-one (21)
calendar days late.

If action is instituted on this Note, the prevailing party shall be entitled to
reasonable attorney's fees. This Note shall be governed by and construed
according to the laws of the State of California, to the jurisdiction of whose
courts in Orange County, California, Holders and VitroCo do hereby submit such
jurisdiction, and agree that venue shall be proper only in Orange County,
California.

IN WITNESS WHEREOF, VitroCo has caused this Note to be duly executed as of the
date of issuance noted below.

Hi-Tech Environmental Products, LLC
d/b/a VitroCo

By:___________________________      Date:___________________________

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