----

| Occidental Energy Marketing, Inc.A Subsidiary of Occidental Petroleum Corporation | 5 Greenway Plaza, Suite 110, Houston, Texas 77046-0521P. O. Box 27570, Houston, Texas 77227-7570Phone 713.215.7000 |
|-----------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------|

| TO:    | Pioneer Natural Resources USA, Inc. |
|--------|-------------------------------------|
|   | Attn: Contract Management Services  |
|   |  Fax: (972) 969-3574           |
|   | Trader: Deb Stewart                 |

| FROM:  | Occidental Energy Marketing, Inc. |
|--------|-----------------------------------|
|   | Trader: Mark Hafner               |

| RE: | Occidental Contract # 0403-PNR-13606-P | Amendment #4 |
|-----|----------------------------------------|--------------|

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| Interface         | Product | Operator                            | Lease Name                      | Lease Effective Date |   | Controlled % |         | County | State   | Transporter |                | Delta  |   | Delta Effective Date |   | Contract |   | Price Index |
|-------------------|---------|-------------------------------------|---------------------------------|----------------------|--------|--------------|--------------|--------|---------|-------------|---------------------|--------|--------|----------------------|--------|----------|--------|-------------|
| 742054720000PIPS  | WTI     | Pioneer Natural Resources USA, Inc. | ARTHUR JUDKINS                  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742054730000PIPS  | WTI     | Pioneer Natural Resources USA       | BESSIE FREEMAN                  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742054700000PITS  | WTI     | Pioneer Natural Resources USA       | CARLETON B                      | 5/1/2005             |   |         | 100.00000000 |   | Upton   | TX          | OET Trucks          |   | $      | 0.60                 |   | 3/1/2006 |   |        | 1190307 |   | XP-Midland Sweet |
| 742054800000PITS  | WTI     | Pioneer Natural Resources USA       | CARLISS JUDKINS                 | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | OET Trucks          |   | $      | 0.60                 |   | 3/1/2006 |   |        | 1190307 |   | XP-Midland Sweet |
| 742054800000PIPS  | WTI     | Pioneer Natural Resources USA       | D L HUTT SEC 26                 | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Enterprise Pipeline |   | $      | 0.60                 |   | 8/1/2010 |   |        | 1190307 |   | XP-Midland Sweet |
| 742054870000PIPS  | WTI     | Pioneer Natural Resources USA       | D L HUTT SEC 26                 | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Enterprise Pipeline |   | $      | 0.60                 |   | 8/1/2010 |   |        | 1190307 |   | XP-Midland Sweet |
| 742054950000PITS  | WTI     | Pioneer Natural Resources USA       | E E ELAND 8                     | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | OET Trucks          |   | $      | 0.60                 |   | 3/1/2006 |   |        | 1190307 |   | XP-Midland Sweet |
| 742054980000PIPS  | WTI     | Pioneer Natural Resources USA       | FREEMAN A                       | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | CenturionPipeline   |   | $      | 0.60                 |   | 5/1/2006 |   |        | 1190307 |   | XP-Midland Sweet |
| 7420549900001PITS | WTI     | Pioneer Natural Resources USA       | GERMANIA SPRABERRY UT TR 1      | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | OET Trucks          |   | $      | 0.60                 |   | 3/1/2006 |   |        | 1190307 |   | XP-Midland Sweet |
| 742054900001PITS  | WTI     | Pioneer Natural Resources USA       | GERMANIA TRACT 1                | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | OETTrucks           |   | $      | 0.60                 |   | 3/1/2006 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055000000PITS  | WTI     | Pioneer Natural Resources USA       | GERMANIA UT TR 113              | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | OET Trucks          |   | $      | 0.60                 |   | 3/1/2006 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055100000PIPS  | WTI     | Pioneer Natural Resources USA       | JADEE                           | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Enterprise          |   | $      | 0.60                 |   | 6/1/2010 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055130000PITS  | WTI     | Pioneer Natural Resources USA       | JUDKINS H 1,2                   | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | OETTruck            |   | $      | 0.60                 |   | 3/1/2006 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055190017PIPS  | WTI     | Pioneer Natural Resources USA       | MIDKIFF DEAN UT TR 17           | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | CenturionPipeline   |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055190018PIPS  | WTI     | Pioneer Natural Resources USA       | MIDKIFF DEAN UT TR 18           | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055190023PIPS  | WTI     | Pioneer Natural Resources USA       | MIDKIFF DEAN UT TR 23           | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055190024PIPS  | WTI     | Pioneer Natural Resources USA       | MIDKIFF DEAN UT TR 24           | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055190025PIPS  | WTI     | Pioneer Natural Resources USA       | MIDKIFF DEAN UT TR 25           | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055190032PIPS  | WTI     | Pioneer Natural Resources USA       | MIDKIFF DEAN UT TR 32           | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055190033PIPS  | WTI     | Pioneer Natural Resources USA       | MIDKIFF DEAN UT TR 33           | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055190034PIPS  | WTI     | Pioneer Natural Resources USA       | MIDKIFF DEAN UT TR 34           | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | CenturionPipeline   |   | $      | 0.60                 |   | 3/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055190000PIPS  | WTI     | Pioneer Natural Resources USA       | MIDKIFF UT                      | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | CenturionPipeline   |   | $      | 0.60                 |   | 3/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055210000PITS  | WTI     | Pioneer Natural Resources USA       | MOBIL NEAL 34                   | 5/1/2005             |   |         | 100.00000000 |   | Upton   | TX          | OET Trucks          |   | $      | 0.60                 |   | 3/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055250000PITS  | WTI     | Pioneer Natural Resources USA       | NAIL T                          | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | OET Trucks          |   | $      | 0.60                 |   | 3/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055260000PITS  | WTI     | Pioneer Natural Resources USA       | NEAL 34                         | 5/1/2005             |   |         | 100.00000000 |   | Upton   | TX          | OETTrucks           |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055330000PITS  | WTI     | Pioneer Natural Resources USA       | ODANIEL COMMINGLED              | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | OET Trucks          |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205541038BPIPS  | WTI     | Pioneer Natural Resources USA       | PRESTON SPRABERRY UT TR 38B     | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | OET Trucks          |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205539042BPIPS  | WTI     | Pioneer Natural Resources USA       | PRESTON SPRABERRY UT TR 42B     | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205535043BPIPS  | WTI     | Pioneer Natural Resources USA       | PRESTON SPRABERRY UT TR 43B     | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205539041BPIPS  | WTI     | Pioneer Natural Resources USA       | PRESTON SPABY UT 41B, OT BOWLES | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205538036BPIPS  | WTI     | Pioneer Natural Resources USA       | PRESTON, SAM R. TR 36B          | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055170000PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORDCOMMINGLE            | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420000PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT        | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420001PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 1   | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420013PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 13  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420014PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 14  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420015PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 15  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205542017CPIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 17C | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420018PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 18  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205542024EPIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 24E | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205542024FPIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 24F | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420028PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 28  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420029PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 29  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420003PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 3   | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420030PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 30  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420032PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 32  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420033PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 33  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420034PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 34  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420035PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 35  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420036PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 36  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420042PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 42  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420043PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 43  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420044PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 44  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205542044BPIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 44B | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420045PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 45  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420046PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 46  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205542048APIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 48A | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205542050BPIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 50B | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420054PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 54  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420057PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 57  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420061PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 61  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420062PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 62  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205542062BPIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 62B | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205542063APIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 63A | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420064PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 64  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420065PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 65  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055420068PIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 68  | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205542070APIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 70A | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 74205542071APIPS  | WTI     | Pioneer Natural Resources USA       | SHACKELFORD SPRABERRY UT TR 71A | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055150000PITS  | WTI     | Pioneer Natural Resources USA       | SNOWDEN A 1-5                   | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | OET Trucks          |   | $      | 0.60                 |   | 3/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742058300000PIPS  | WTI     | Pioneer Natural Resources USA       | SNOWDEN A-6                     | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | Centurion Pipeline  |   | $      | 0.60                 |   | 5/1/2005 |   |        | 1190307 |   | XP-Midland Sweet |
| 742055550000PITS  | WTI     | Pioneer Natural Resources USA       | WALTON JUDKINS B                | 5/1/2005             |   |         | 100.00000000 |   | Midland | TX          | OET Trucks          |   | $      | 0.60                 |   | 3/1/2006 |   |        | 1190307 |   | XP-Midland Sweet |

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