Exhibit 10.21






210
      Park Avenue, Suite 1600Oklahoma
      City. OK 73102Phone:
      (405) 239-7191FAX:
      (405) 602-1251





TEPPCO
CRUDE OIL, LLC





Quantity
Amendment Confirmation





TEPPCO
      Contract
      Number    PNR-P990187-W           Amendment
      #            54Pioneer
      Contract #: OIL-Teppc-01321TEPPCO
      Contact:    Laynce
Nix





November
24, 2009








Pioneer
Natural Resources, USA, Inc.


Ms.
Marilynn Payne


5205 N.
O'Connor Blvd., Suite 200


Irving,
TX  75039





Phone:
            (972)
      444-9001


FAX:
            (972)
      969-3574





Dear Ms.
Payne:





This
letter hereby confirms the oral agreement between Pioneer Natural Resources,
USA, Inc. ("Pioneer") and TEPPCO Crude Oil, LLC ("TCO"), whereby the QUANTITY
provision of the above referenced contract ("Original Agreement") has been
amended as shown on the attached Exhibit A.





The
effective date of this amendment shall be the date(s) as shown on the attached
Exhibit A.





Unless we
receive from you written notice of objection within three (3) business days of
your receipt of this Confirmation, this Confirmation shall be binding upon both
parties. Except as amended herein, the terms and provisions of the Original
Agreement and any previous amendments shall remain in full force and effect and
are ratified hereby. If you have any questions, please call Christy Borelli,
(405) 239-5796.




TEPPCO
      Crude Oil, LLCBy
      TEPPCO Crude GP, LLC
            
            Pioneer
      Natural Resources USA, Inc.Its
      sole managerBy:
            /s/
      Hershal K. WolfeBy:
            /s/
      Christy Borelli
            
            
            
            Hershal
      K. WolfeChristy
      Borelli
            
            
            
            Vice
      President MarketingManager,
      Contract AdministrationForJoe
      SimonVice
      President, Crude Supply and Marketing





TEPPCO
      CRUDE Oil LLC
            PIONEER
      NATURAL RESOURCESEXHIBIT
      A, AMENDMENT 54
            CONTRACT
      NO. PNR-P990187-WCONTRACT
      DATED; FEBRUARY 4, 1999








TEPPCO
              
              
              
              
              LEASELSE
      #
              LEASE
      NAME
              COUNTY/TX
              TRANSPORTER
              AMOUNT
              EFF.
      DATE
  16051
              BEAL
      SNYDER B & C
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916056
              BEAL
      SNYDER F
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916080
              BEAL
      SNYDER G
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916093
              BEAL
      SNYDER H
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916145
              BEAL
      SNYDER HEIRS 3
              
              MIDLAND
              TEPPCO
      PI
              -$0.52
              01/01/9916081
              BERMAN
      A & B
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916200
              BRADFORD
      B,C,D,G,H,J,O,P
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              02/01/9916200A
              BRADFORD
      B
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              02/01/9916200C
              BRADFORD
      D
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              02/01/9916200E
              BRADFORD
      H
              
              MIDLAND
              TEPPCO
      PI
              -$0.52
              02/01/9916200G
              BRADFORD
      O
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              02/01/9916200H
              BRADFORD
      P
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              02/01/9916164
              BRANHAM
      2 & 7
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916164A
              BRANHAM
      2
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              10/01/0916164B
              BRANHAM
      7
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              10/01/0916097
              BRIDGEWATER
      B
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916008
              BRYANT
      B
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916068
              BUCHANAN
      H
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916017
              BUCHANAN
      J
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              06/01/0716094
              BUCHANAN
      N
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              05/01/0516144
              BUCHANAN
      R 2
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916075
              CRAWFORD
      A
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916074
              CRAWFORD
      C
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9918184
              CRAWFORD
      F
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916098
              CRAWFORD
      J
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916108
              CRAWFORD
      K & L
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916108A
              CRAWFORD
      K
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              04/01/02161088
              CRAWFORD
      L
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              04/01/0216090
              CRESPI
      L
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              06/01/0716090A
              CRESPI
      L WELL 1
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              06/01/0716090B
              CRESPI
      L WELL 2
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              06/01/0716113
              CRESPI
      Q & 5
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916113A
              CRE5PI
      Q
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              08/01/0316113B
              CRESPI
      S
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              08/01/0316217
              CUNNINGHAM
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916215
              CUNNINGHAM
      A
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916216
              CUNNINGHAM
      D
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916088
              DONOVAN
      D & G
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              05/01/0316088A
              DONOVAN
      D
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              04/01/0616088B
              DONOVAN
      G
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              04/01/0616096
              DONOVAN
      E
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              06/01/0716222
              DONOVAN
      F
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              06/01/0716202
              DONOVAN
      G N
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              02/01/0416052
              FASKEN
      I
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916059
              FASKEN
      J
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916061
              FASXEN
      L
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916062
              PASKEN
      N
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916198
              FASKEN
      Q
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916114
              FASKEN
      Z
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/8916070
              FRANK
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916049
              GOLLADAY
      K
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916101
              LAY
      6
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916055
              MCALISTER
      H
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              06/01/0716084
              MCALISTER
      O
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              06/01/0716083
              MCALISTER
      P
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916095
              MCALISTER
      Q, MCALISTER R & RAYFORD MCALISTER 2
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              06/01/0716095A
              MCALISTER
      Q
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              06/01/0716095B
              MCALISTER
      R
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              06/01/0716095C
              RAYFORD
      MCALISTER 2
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              08/01/0716109
              MCALISTER
      S
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916240
              PIGG2
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              09/01/0816087
              RAGGETT
      C
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              06/01/0716171
              ROBERSON
      A & E
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916171A
              ROBERSON
      A
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              09/01/0116171B
              ROBERSON
      E
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              09/01/0316172
              ROBERSON
      B
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/0716071
              ROBERSON
      D
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9918076
              SALLY
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916877
              SALLY
      A
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916078
              SALLY
      B
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916079
              SALLY
      C
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916069
              TEXACO
      E
              
              MARTIN
              TEPPCO
      PL
              -$0.52
              01/01/0716103
              WILLIS
      A
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916021
              WILLIS
      B
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916082
              WILLIS
      D & WILLIS D 2
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916092
              WILLIS
      E
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9918106
              WILLIS
      F
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916014
              WWKLEMAN
      1 WELLS 3,4 & 6
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916022
              WINKLEMAN
      B
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9916112
              WINKLEMAN
      C
              
              MIDLAND
              TEPPCO
      PL
              -$0.52
              01/01/9944497
              CLINE
              
              DAWSON
              TEPPCO
      TRK
              -$0.80
              05/01/0647252
              HUBBARD
      1
              
              DAWSON
              TEPPCO
      TRK
              -$0.80
              01/01/0747478
              WOODUL
      1
              
              DAWSON
              TEPPCO
      TRK
              -$0.80
              08/01/0747760
              BARRON
      1
              
              DAWSON
              TEPPCO
      TRK
              -$0.59
              04/01/0844885
              BETH
      A & BETH E
              
              MIDLAND
              TEPPCO
      TRK
              -$0.59
              06/01/0744885A
              BETH
      A
              
              MIDLAND
              TEPPCO
      TRK
              -$0.59
              06/01/0744685B
              BETH
      E
              
              MIDLAND
              TEPPCO
      TRK
              -$0.59
              08/01/0743773
              BRADFORD
      E 1,2,3,4 & I
              
              MIDLAND
              TEPPCO
      TRK
              -$0.59
              01/01/9943773A
              BRADFORD
      El & 2
              
              MIDLAND
              TEPPCO
      TRK
              -$0.59
              02/01/9943773B
              BRADFORD
      I 1
              
              MIDLAND
              TEPPCO
      TRK
              -$0.59
              02/01/9943773C
              BRADFORD
      E 3
              
              MIDLAND
              TEPPCO
      TRK
              -$0.59
              12/01/0843775
              BRADFORD
      K 1
              
              MIDLAND
              TEPPCO
      TRK
              -$0.59
              01/01/9943775C
              BRADFORD
      K 3
              
              MIDLAND
              TEPPCO
      TRK
              -$0.59
              02/01/9943775D
              BRADFORD
      K 4
              
              MIDLAND
              TEPPCO
      TRK
              -$0.59
              12/01/0343777
              BRADFORD
      N
              
              MIDLAND
              TEPPCO
      TRK
              -$0.59
              01/01/9947860
              BRASHERS
      20 1
              
              MARTIN
              TEPPCO
      TRK
              -$0.59
              06/01/0848243
              BRUNSON
      48
              
              GLASSCOCK
              TEPPCO
      TRK
              -$0.59
              04/01/09









TEPPCO
      CRUDE Oil LLC
            PIONEER
      NATURAL RESOURCESEXHIBIT
      A, AMENDMENT 54
            CONTRACT
      NO. PNR-P990187-WCONTRACT
      DATED; FEBRUARY 4, 1999







TEPPCO
            
            
            
            
            LEASELSE
      #
            LEASE
      NAME
            COUNTY/TX
            TRANSPORTER
            AMOUNT
            EFF.
      DATE




47472
            BUCHANAN
      K
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            08/01/0747253
            BUCHANAN
      L
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            02/01/0743830
            BUCHANAN
      M
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0744400
            BUCHANAN
      MRS OP ET AL
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9943831
            BUCHANAN
      O
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0744883
            BUCHANAN
      P
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0743837
            BUCHANAN
      Q
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0747473
            BUCHANAN
      R
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            08/01/0744402
            BUCHANAN
      Y
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9948108
            COOK
      22 4, BUTCHEE 21 1 A 22 A, COOK 21 1
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            12/01/0848108A
            BUTCHEE
      21 1
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            12/01/0848108B
            BUTCHEE
      22 A
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            12/01/0848108C
            COOK
      22 4
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            12/01/0848108D
            COOK
      21 1
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            12/01/0844718
            CASSIDY
      B & C
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            05/01/0647291
            CHEATHAM
      13 NO 1,2,4 & HERZOG 24 2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            02/01/0747291A
            CHEATHAM
      13 NO 1
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            12/01/0847291B
            CHEATHAM
      13 NO 2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            12/01/0847291C
            CHEATHAM
      13 NO 4
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            12/01/0847291D
            HERZOG
      24 2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            12/01/0847441
            CHEATHAM
      19-1
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            07/01/0747288
            CHEATHAM
      2,3,4,5,6
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            02/01/0747414
            CHEATHAM
      311,2 & HOUSTON 30
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            05/01/0747414A
            CHEATHAM
      311
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            10/01/0847414B
            CHEATHAM
      312
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            10/01/0847414C
            HOUSTON
      30
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            10/01/0843352
            CHRIESMAN
      1
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            01/01/0843351
            CHRIESMAN
      A 1,2,3,4,5
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            01/01/0847249
            COUEY
      (14072)
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            12/01/06433S0
            COUEYB
      (20247)
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            01/01/0847662
            COULSON
      3
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            03/01/0847676
            CRESPI
      0 2
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            03/01/0844495
            DEAN
      R FLEMING
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            05/01/064358S
            DOLLIERUTHC
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            07/01/0347350
            EVANS
      B
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            04/0V0747351
            EVANS
      C
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            04/01/0743502
            FASKEN
      H
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9948198
            FASKEN
      I
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            03/01/0947348
            FASKEN
      K
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            04/01/0747349
            FASKEN
      K2
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            04/01/0743612
            FASKEN
      O
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9947292
            FERGUS0N-MAUCH
      2
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            02/01/0747579
            FOWLER
      A 4
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            12/01/0747355
            FOWLER
      B 1,2 & HANCOCK A
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            04/01/0747355A
            FOWLER
      B 1
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            11/01/07473S5B
            HANCOCK
      A
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            11/01/0747335C
            FOWLERS
      2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            03/01/0847415
            FRANKLIN
      41 3
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            05/01/0747307
            FRANKLIN
      41 NO 2
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            03/01/0747636
            FRED
      B HOUSTON R HERZOG 9 2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            02/01/0847636A
            FRED
      B HOUSTON
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            12/01/0847636B
            HERZOG
      9 2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            12/01/0844378
            GOLLADAY
      J
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            02/01/0543892
            GOLLADAY
      P
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0743928
            GOLLADAY
      P 3
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0747296
            GRAVES
      38
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            03/01/0747409
            GRAVES
      46-2
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            05/01/0744894
            HARTGROVE
      CTB A,B,C,D,E,F
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            06/01/0744894A
            HARTGROVE
      A
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            06/01/0744S94B
            HARTGROVE
      B
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            06/01/0744894C
            HARTGROVE
      C
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            06/01/0744894D
            HARTGROVE
      D
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            06/01/0744894E
            HARTGROVE
      E
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            06/01/0744894F
            HARTGROVE
      F
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            06/01/0744894G
            HARTGROVE
      1,2,4,5
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            06/01/0743834
            HEIDELBERG
      A
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            08/01/0748114
            HOUSTON
      5 1
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            12/01/0847438
            HOUSTON
      RANCH 12&
      13
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            07/01/0747438A
            HOUSTON
      RANCH 12 1
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            05/01/0947438B
            HOUSTON
      RANCH 13 1
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            05/01/0947438C
            HOUSTON
      RANCH 12 2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            05/01/0948029
            HOUSTON
      RANCH 25 2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            10/01/0847437
            HOUSTON
      RANCH 36 1
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            07/01/0748155
            HOUSTON
      WOODY 9
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            01/01/0947248
            HUTCHISON
      C
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            12/01/0644882
            HUTCHISON
      D
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0748016
            JIMTOM 32 1R, 30 1,
      303
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            09/01/0848016A
            JIM
      TOM 32 1R
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            10/01/0848016B
            JIM
      TOM 31 1
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            10/01/0848016C
            JIM
      TOM 30 3
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            10/01/0844887
            JUDKINS
      C&JUDKINS D
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            06/01/0744887A
            JUDKINS
      C
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            06/01/0744887B
            JUDKINS
      D
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            06/01/0747560
            KADERLI
      25 1, 2, 4
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            10/01/0747352
            KING
      A
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0743835
            KING
      B
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0747406
            KING
      F
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            05/01/0743840
            LEONARD
      B
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0743420
            LESTER
      TRUST 2
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            03/01/0447280
            LITTLETON
      2
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            02/01/0747297
            LLOYD
      2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            03/01/0748215
            LLOYD
      23 1
            
            
            TEPPCO
      TRK
            -$0.59
            03/01/0947298
            LLOYD
      3
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            03/01/0743836
            MARION
      A
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0743841
            MARION
      B
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0747357
            MCADAMS
      LEWIS A Z
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            04/01/0747300
            NEWMAN
      A1 & FOWLER A Z
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            03/01/07









TEPPCO
      CRUDE Oil LLC
            PIONEER
      NATURAL RESOURCESEXHIBIT
      A, AMENDMENT 54
            CONTRACT
      NO. PNR-P990187-WCONTRACT
      DATED; FEBRUARY 4, 1999






TEPPCO
            
            
            
            
            LEASELSE
      #
            LEASE
      NAME
            COUNTY/TX
            TRANSPORTER
            AMOUNT
            EFF.
      DATE




47300A
            NEWMAN
      A 1
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            10/01/07173008
            FOLWER
      A 2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            10/01/0747300C
            NEWMAN
      A 2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            01/01/0847300D
            NEWMAN
      A 4
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            04/29/1947250
            NOELKE
      A
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            12/01/0643834
            NOELKE
      B
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            12/01/0643585
            NOELKE
      C
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            12/01/0644895
            NORTH
      PEMBROOK SPRAYBERRY TR 26
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            06/01/0744909
            NORTH
      PEMBROOK SPRAYBERRY TR 23A
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            08/01/0744807
            NORTH
      PEMBROOK SPRAYBERRY TR 25A
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            06/01/0744902
            NORTH
      PEMBROOK SPRAYBERRY TR 26A
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            06/01/0744908
            NORTH
      PEMBROOK SPRAYBERRY TR 49A
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            06/01/0744903
            NORTH
      PEMBROOK SPRAYBERRY TR 50A
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            06/01/0744910
            NORTH
      PEMBROOK SPRAYBERRY TR 63A
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            06/01/0744904
            NORTH
      PEMBROOK SPRAYBERRY TR 72A
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            08/01/0744903
            NORTH
      PEMBROOK SPRAYBERRY TR 91A
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            06/01/0744908
            NORTH
      PEMBROOK SPRAYBERRY TR 92A
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            06/01/0747643
            ORSON
      4 2
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            02/01/0847407
            ORY
      3
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            05/01/0744876
            POWELL
      C 1
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            06/01/0743837
            RAGGETT
      D
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            08/01/0747344
            RICHARDS
      41 1
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            04/01/0747282
            RICHARDS
      47 A 1
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            02/01/0948200
            R1GGAN
      A 2 and R1GGAN 1
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            03/01/0948200A
            R1GGAN
      A 2
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            03/01/0948200B
            RIGGAN
      1
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            03/01/0948200C
            MILLS
      37 B
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            04/01/0948170
            RUFUS
      11 1 & 2
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            02/01/0948059
            SAWYER
      3 3
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            10/01/0843349
            SCHAEFER
      Al
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            01/01/0847194
            SKAAGS
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            12/01/0648115
            SNODGRASS
      92
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            12/01/0647254
            SPRAYBERRY
      DRIVER UNIT
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            02/01/0747838
            STONE
      45 1
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            02/01/0043848
            STOUT
      B
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            08/01/0744877
            STOUT
      G
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            08/01/0747650
            STUBBLEFIELD
      26 1 & 26A
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            02/01/0844911
            TATE
      6 3
            
            MARTIN
            TEPPCO
      TRK
            -$0.59
            11/01/0643779
            TEXAS
      TEN & D
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9943779A
            TEXAS
      TEN
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            09/01/0343779B
            TEXAS
      TEN D
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            09/01/0343780
            TEXAS
      TEN B 1, 2
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9943760A
            TEXAS
      TEN B I
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9943780B
            TEXAS
      TEN B2
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9943762
            TEXAS
      TEN E
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9943769
            TEXAS
      TEN H & O
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9943769A
            TEXAS
      TEN H
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            09/01/0343769B
            TEXAS
      TEN O 1
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            09/01/0343769C
            TEXAS
      TEN O 2
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            09/01/0343769D
            TEXAS
      TEN O 3
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            11/01/0543766
            TEXAS
      TEN L
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9943767
            TEXAS
      TEN M
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9943766
            TEXAS
      TEN N
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9943771
            TEXAS
      TEN I, P, Q
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            01/01/9943771A
            TEXAS
      TEN I
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            09/01/0343771B
            TEXAS
      TEN P
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            09/01/0343771C
            TEXAS
      TEN Q
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            09/01/0344717
            TINNEY
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            05/01/0648124
            TOM
      E 2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            01/01/0944880
            TXL
      D
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            08/01/0744879
            TXL
      QQ
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            06/01/0744878
            TXL
      UU
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            08/01/0744443
            UNIVERSITY
      15A 1 15B 1
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            01/01/0844444
            UNIVERSITY
      16B & 16C
            
            REAGAN
            TEPPCO
      TRK
            -$0.59
            01/01/0848249
            WEYMAN
      23 2
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            05/01/0948110
            WHIT
      29 1
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            12/01/0844623
            WILLIS
      AA 1
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            12/01/0543849
            WINDHAM
      Q
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            06/01/0743849A
            WINDHAM
      Q l
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            08/01/0843849B
            WINDHAM
      02
            
            UPTON
            TEPPCO
      TRK
            -$0.59
            08/01/0848125
            WITT
      24 & GRIFFITH 25
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            01/01/0948125A
            WITT
      24
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            03/01/0948125B
            GRIFFITH
      25
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            03/01/0944912
            WOODFIN
      3
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            11/01/0644886
            WRAGE
      HENDERICKSON & WRANGE HENDERICSON A
            
            GLASSCOCK
            TEPPCO
      TRK
            -$0.59
            06/01/0743987
            YARBROUGH
      4
            
            MIDLAND
            TEPPCO
      TRK
            -$0.59
            11/01/0148225
            YATES
      82 3
            
            DAWSON
            TEPPCO
      TRK
            -$0.59
            04/01/09




1)
            ADD
      LEASE EFFECTIVE OCTOBER 1, 2009 - FOR ALLOCATION
  PURPOSES


2)
            CHANGE
      LEASE NAME EFFECTIVE OCTOBER 1 2009 - FOR ALLOCATION
    PURPOSES