Document:

TIDELANDS OIL AND GAS CORPORATION
                          1862 W. Bitters, Building 1
                            San Antonio, Texas 78248
                Phone: 1-866-764-8642       Fax: (210) 764-2809

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                                 PROMISSORY NOTE
                                 ---------------

$300,000.00 USD                                                 January 29, 2004

For value  received,  Melvin,  R.  Ward,  Inc.,  promise  to pay to the order of
Tidelands Oil and Gas Corporation, 1862 W. Bitters, Bldg. 1, located in the city
of  San  Antonio,  Texas  78248  the  sum  of  Three  Hundred  Thousand  Dollars
($300,00.00) in the legal and lawful money of the United States of America, with
interest thereon from the hereof until maturity at the rate of Five percent (5%)
per annum;  unpaid principal and interest shall bear interest at the rate of Ten
percent (10%) per annum from date of maturity  until paid.  This note is due and
payable on January 29, 2007 with no penalty for prepayment.

The principal  balance shall be reduced by  $500.00/hour  in accordance with the
terms of the Aircraft Prepaid Lease/Use  Agreement (As Amended) attached,  after
first charging interest computed on a monthly basis.

It is expressly  provided that upon default in the punctual payment of this note
or any part  thereof,  principal or  interest,  as the same shall become due and
payable, the entire indebtedness  evidence hereby, is collected through Probate,
Bankruptcy  or other  judicial  proceedings  by an  attorney or is placed in the
hands of any attorney for collection after maturity then the undersigned  agrees
and  promises to pay a reasonable  attorney's  fee for  collection,  which in no
event shall be less then Ten percent  (10%) of the  principal  and interest then
owing.

Each maker,  surely and  endorser of this Note,  expressly  waives all  notices,
demands  for  payment,  presentations  for  payment,  notices of  intentions  to
accelerate the maturity,  protest and notice of protest,  as to this note and as
to each, every and all  installments,  hereof and each consents the payee or the
holder of this note,  may at any time,  and from time to time upon request of or
by agreement  with any of us,  extend the date of maturity  hereof or change the
time or method of  payments  without  notice to any other  makers,  sureties  or
endorsers, who shall remain bound for payment hereof.

--------------------
 Royis WardExhibit 10.49

                       AMENDMENT AND SETTLEMENT AGREEMENT

     This Amendment and Settlement  Agreement (this "Amendment") with respect to
that certain Asset Purchase Agreement (the "Purchase  Agreement") dated November
30, 2005 by and between MedSolutions, Inc., a Texas corporation (the "Company"),
and Positive Impact Waste Solutions,  LLC, a Delaware limited  liability company
("PIWS," and collectively with the Company, the "Parties," and each individually
a  "Party"),  is entered  into by the  Company  and PIWS on June 30,  2006.  All
capitalized terms used but not defined herein shall have the respective meanings
assigned to them by the Purchase Agreement.

     WHEREAS, the Parties agree that it would be in each of their best interests
to amend Section 5.07 of the Purchase Agreement, in accordance with Section 9.10
thereof,  relating  to certain of PIWS'  service and  upgrade  obligations  with
respect to the Purchased Units;

     WHEREAS, PIWS was required to assign and deliver certain customer contracts
pursuant to Section 5.09 of the Purchase Agreement; and

     WHEREAS,  the  Parties  desire  to  settle  certain  disputes  relating  to
adjustments  to the  Purchase  Price  pursuant to Section  5.09 of the  Purchase
Agreement.

     NOW,  THEREFORE,   in  consideration  of  the  mutual  provisions  of  this
Amendment,  and other legal consideration,  the receipt and sufficiency of which
the Parties hereby acknowledge, the Parties hereby agree as follows:

     1. Amendment to Section 5.07 of the Purchase Agreement. Section 5.07 of the
Purchase  Agreement is hereby amended by deleting the entire text thereof and by
substituting in its place the following language:

     Units and  Equipment.  The Seller  hereby  grants  the Buyer a full  90-day
     warranty from the Closing Date for all  non-consumable  equipment and parts
     contained within the Purchased Units with serial numbers 4, 5, 6 and 7. The
     Seller  further  agrees to service and upgrade the Purchased  Units,  at no
     charge to the Buyer  except as  otherwise  set forth on Schedule  5.07,  in
     accordance  with the schedule set forth on Schedule  5.07  attached to this
     Amendment.  The  Seller  shall  upgrade,  at no  charge to the  Buyer,  the
     Purchased  Units with serial numbers 4, 5 and 6 with breakaway  assemblies,
     and the  Purchased  Units with  serial  numbers 5 and 6 with floor  mounted
     hoppers.  The Seller  shall  provide the Buyer,  at no charge to the Buyer,
     with the first set of  replacement  teeth  (both shaft and tube) for any of
     the Purchased Units with teeth that were installed  before October 1, 2005.
     All service and  upgrades  set forth in this  Section  5.07 and on Schedule
     5.07 will be completed by PIWS no later than  September  30, 2006  assuming
     such  units  are  made  available  by the  Buyer  when  requested  by PIWS;
     provided,  however,  that PIWS  shall give the Buyer at least  seven  days'
     prior  written  notice of the date on which it desires to perform  any such
     service and upgrades;  provided  further,  however,  that in the event that
     PIWS is required to replace rather than repair the pre-grind  tubes for the
     Purchased  Units with serial  numbers 4 and 5, the Buyer shall grant PIWS a

<PAGE>

     reasonable  period  of time  beyond  September  30,  2006 to  perform  such
     services.

     2.  Agreement  Regarding  Assignment  of  Customer  Contracts.  Each of the
Company and PIWS hereby  agree that the Company  shall,  effective  immediately,
deduct an aggregate  amount of  $195,000.00  from the Purchase Price pursuant to
Section 5.09 of the Purchase  Agreement  as follows:  $65,000.00  of such amount
shall be deducted from the principal amount of the $300,000 Note;  $65,000.00 of
such amount shall be deducted  from the principal  amount of the $550,000  Note;
and  $65,000.00  of such amount shall be deducted  from the Shares by redemption
and cancellation of 52,000 Shares at the Share Value for no consideration.  Each
of the Company and PIWS hereby agree that PIWS shall have no further obligations
or liabilities  pursuant to Section 5.09 of the Purchase Agreement except as set
forth in the immediately  preceding sentence.  Any amounts which the Company has
previously  taken as  deductions  against  the  Purchase  Price  that are not in
compliance with the final  deduction noted above shall be immediately  adjusted.
Any excess funds owed related to these  previously taken deductions will be paid
upon execution of this agreement.

     3. No Further Amendments. All other representations, warranties, covenants,
terms,  and conditions of the Purchase  Agreement shall remain in full force and
effect.

     4. No Other Non-Compliance. The Company and PIWS agree that, except for the
items set forth in 1. and 2.  above,  to the actual  knowledge  of the  Company,
there  are no other  areas of  non-compliance  with  the  terms of the  Purchase
Agreement;  provided,  however  that the Company  makes no such  agreement  with
respect to the  representations  and  warranties  set forth in  Section  3.17(b)
regarding  the  ability of the  Purchased  Units to process  not less than 1,500
pounds of waste per hour, which ability the Company hereby reserves the right to
continue to evaluate. Except as set forth in the immediately preceding sentence,
the Company and PIWS agree that compliance with this Amendment cures any alleged
non-compliance with the original Purchase Agreement dated November 30, 2005.

<PAGE>

     IN  WITNESS  WHEREOF,  the  Parties  have  executed  this  Amendment  to be
effective as of the date first written above.

                                            THE COMPANY:
                                            -----------

                                            MEDSOLUTIONS, INC.

                                            /s/ Matthew H. Fleeger
                                            ------------------------------------
                                            Matthew H. Fleeger, President & CEO

                                            PIWS:
                                            ----

                                            POSITIVE IMPACT WASTE SOLUTIONS, LLC

                                            /s/ Tim Spencer
                                            ------------------------------------
                                            Tim Spencer, President

<PAGE>

                                  Schedule 5.07

                         Service and Upgrade Obligations

Unit #4
     Repair floor
     Fix Pre-Grind Tube
     Inspect Hydralic Lines
     Replace Teeth
     Replace 2 side doors
     Remove back door
     Install Breakaway Hub Assembly
     Blown left seal
     Hopper door repair
     Hopper seal J box replacement
     Radiation detector inspection and repair
     Auger top plate repair
     Repair loose sides on trailer
     Repair crack on hopper
     Paint interior
     Repair exterior damage and replace damaged parts and exterior panels
     Remove exterior decals and clean
     Install  new decals at  MedSolutions'  expense  (artwork  to be provided by
     MedSolutions)
     Replace pre-grind tubes (repair only if approved by MedSolutions)

Unit #5
     Floor inspection
     Repair crack on hopper
     Install Breakaway Hub Assembly
     Install Floor-mounted Cold-Ster Hopper
     Inspect trailer
     Radiation detector inspection and repair
     Paint interior
     Repair exterior damage and replace damaged parts and exterior panels
     Remove  exterior  decals  and clean  Install  new  decals at  MedSolutions'
     expense (artwork to be provided by MedSolutions)
     Replace pre-grind tubes (repair only if approved by MedSolutions)

<PAGE>

Unit #6
     Teeth replacement
     Install Breakaway Hub Assembly
     Install Floor-mounted Cold-Ster Hopper
     Radiation detector inspection and repair
     Inspect trailer
     Paint interior
     Repair exterior damage and replace damaged parts and exterior panels
     Remove  exterior  decals  and clean  Install  new  decals at  MedSolutions'
     expense (artwork to be provided by MedSolutions)
     Replace flighting

     Unit #7
     Radiation detector inspection and repair
     Short in control box repair
     Repair exterior damage and replace damaged parts and exterior panels
     Remove  exterior  decals  and clean  Install  new  decals at  MedSolutions'
     expense (artwork to be provided by MedSolutions)

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