{"id":43539,"date":"2015-09-17T11:25:58","date_gmt":"2015-09-17T16:25:58","guid":{"rendered":"https:\/\/content.findlaw-admin.com\/ability-legal\/contracts\/uncategorized\/purchase-and-sale-agreement-union-oil-co-of-california-and-tom.html"},"modified":"2015-09-17T11:25:58","modified_gmt":"2015-09-17T16:25:58","slug":"purchase-and-sale-agreement-union-oil-co-of-california-and-tom","status":"publish","type":"corporate_contracts","link":"https:\/\/corporate.findlaw.com\/contracts\/planning\/purchase-and-sale-agreement-union-oil-co-of-california-and-tom.html","title":{"rendered":"Purchase and Sale Agreement &#8211; Union Oil Co. of California and Tom Brown Inc."},"content":{"rendered":"<pre>                          PURCHASE AND SALE AGREEMENT\n\n                                    BETWEEN\n\n                        UNION OIL COMPANY OF CALIFORNIA\n\n                                      AND\n\n                                TOM BROWN, INC.\n\n                                     DATED\n\n                                  JUNE 8, 1999\n\n\n\n\n   2\n\n\n\n\n\n                               TABLE OF CONTENTS\n<\/pre>\n<table>\n<p><s>                                                                           <c><br \/>\nSECTION 1<\/p>\n<p>         DEFINITIONS&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..1<br \/>\n         1.1      Defined Terms&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;1<br \/>\n         1.2      Undefined Financial Accounting Terms&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.9<br \/>\n         1.3      References&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;9<br \/>\n         1.4      Construction&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.9<\/p>\n<p>SECTION 2<\/p>\n<p>         PURCHASE AND SALE&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.10<br \/>\n         2.1      Assets&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;10<br \/>\n         2.2      Excluded Assets&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;11<br \/>\n         2.3      Purchase Price&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.13<br \/>\n         2.4      Payment Procedures&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;13<br \/>\n         2.5      Adjusted Cash Purchase Price&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..13<br \/>\n         2.6      Cash Settlement&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;13<br \/>\n         2.7      Assumption Agreement&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.14<\/p>\n<p>SECTION 3<\/p>\n<p>         TITLE EXAMINATION&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.14<br \/>\n         3.1      Access to Title Information&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;14<br \/>\n         3.2      Title Defects&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..15<br \/>\n         3.3      Notice of Title Defect&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..15<br \/>\n         3.4      Claim Value&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.15<br \/>\n         3.5      Defect Value&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;15<br \/>\n         3.6      Remedies for Title Defects&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.16<br \/>\n         3.7      Purchase Price Adjustments Threshold&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;17<br \/>\n         3.8      Preferential Purchase Rights&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..17<br \/>\n         3.9      Preferential Purchase Right Disputes&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;18<\/p>\n<p>SECTION 4<\/p>\n<p>         ENVIRONMENTAL MATTERS&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;18<br \/>\n         4.1      No Admission Against Interest&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.18<br \/>\n         4.2      Physical Condition of the Assets&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.19<br \/>\n         4.3      Endangered Species, Critical Habitat, Wetlands,<br \/>\n                  Geologic Hazards and Flooding&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.19<br \/>\n<\/c><\/s><\/table>\n<p>                                       i<\/p>\n<p>   3<\/p>\n<table>\n<p><s>                                                                           <c><br \/>\n         4.4      Environmental Assessments and Completion of<br \/>\n                  Environmental Due Diligence&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;20<br \/>\n         4.5      Buyer&#8217;s Access to Assets; Indemnification; Insurance&#8230;&#8230;..21<br \/>\n         4.6      Assumption of Environmental Liabilities&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;22<br \/>\n         4.7      Qualified Claim Cost Sharing&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..23<br \/>\n         4.8      Limitation&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..24<br \/>\n         4.9      Termination Due to Material Environmental Deficiencies&#8230;&#8230;24<br \/>\n         4.10     Determination of Value&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..24<\/p>\n<p>SECTION 5<\/p>\n<p>         OPERATIONS AND CASUALTY LOSS&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..25<br \/>\n         5.1      Operations&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..25<br \/>\n         5.2      Casualty Loss&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..26<br \/>\n         5.3      Successor Operator&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;26<br \/>\n         5.4      Restrictions on Operations&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.26<br \/>\n         5.5      Permit Transfers&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..26<\/p>\n<p>SECTION 6<\/p>\n<p>         REPRESENTATIONS AND WARRANTIES OF UNOCAL&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..27<br \/>\n         6.1      Organization&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;27<br \/>\n         6.2      Authority to do Business&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;28<br \/>\n         6.3      Authority; Enforceability&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..28<br \/>\n         6.4      Litigation, Suits or Claims&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;28<br \/>\n         6.5      Disclaimer of Warranties&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;28<br \/>\n         6.6      Gas Entitlements and Imbalances&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..29<br \/>\n         6.7      No Breach&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;29<br \/>\n         6.8      Environmental Condition of Assets&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;29<br \/>\n         6.9      Compliance with Laws and Agreements&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.30<br \/>\n         6.10     Taxes&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.30<br \/>\n         6.11     No Distribution&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;30<br \/>\n         6.12     Current Commitments&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..30<br \/>\n         6.13     Brokers&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..30<br \/>\n         6.14     Ownership of Common Stock&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..31<br \/>\n         6.15     Royalties&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;31<\/p>\n<p>SECTION 7<\/p>\n<p>         REPRESENTATIONS AND WARRANTIES OF BUYER&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;31<br \/>\n         7.1      Organization&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;31<br \/>\n<\/c><\/s><\/table>\n<p>                                       ii<\/p>\n<p>   4<\/p>\n<table>\n<p><s>                                                                           <c><br \/>\n         7.2      Authority; Enforceability&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..31<br \/>\n         7.3      Consents&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.32<br \/>\n         7.4      Litigation, Suits or Claims&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;32<br \/>\n         7.5      No Breach&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;32<br \/>\n         7.6      Compliance with Laws and Agreements&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.32<br \/>\n         7.7      Investigations of Assets&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;32<br \/>\n         7.8      No Distribution&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;33<br \/>\n         7.9      Federal Leases&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.33<br \/>\n         7.10     Capitalization of Buyer; Title to the Shares&#8230;&#8230;&#8230;&#8230;&#8230;.33<br \/>\n         7.11     SEC Filings&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.33<br \/>\n         7.12     Financial Statements&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.34<br \/>\n         7.13     Absence of Certain Changes&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.34<br \/>\n         7.14     Regulatory Authority&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.36<br \/>\n         7.15     Environmental Matters&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;36<br \/>\n         7.16     Brokers&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..36<\/p>\n<p>SECTION 8<\/p>\n<p>         CONDITIONS PRECEDENT TO THE OBLIGATIONS OF UNOCAL&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..36<br \/>\n         8.1      Purchase Price&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.36<br \/>\n         8.2      Buyer&#8217;s Representations and Warranties True and Correct&#8230;..36<br \/>\n         8.3      Officer&#8217;s Certificate&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;36<br \/>\n         8.4      Opinion of Counsel&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;37<br \/>\n         8.5      Pre-Closing Performance&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.37<br \/>\n         8.6      Authorization&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..37<br \/>\n         8.7      Absence of Litigation&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;38<br \/>\n         8.8      Bonds&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.38<br \/>\n         8.9      Hart-Scott-Rodino Act&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;38<br \/>\n         8.10     Stock Ownership and Registration Rights Agreement&#8230;&#8230;&#8230;..38<br \/>\n         8.11     Certificates of Insurance&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..38<br \/>\n         8.12     Permits, Consents and Preferential Purchase Rights&#8230;&#8230;&#8230;.38<br \/>\n         8.13     Satisfactory Results of Unocal&#8217;s Diligence&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;38<\/p>\n<p>SECTION 9<\/p>\n<p>         CONDITIONS PRECEDENT TO THE OBLIGATIONS OF BUYER&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;38<br \/>\n         9.1      Delivery of Cash Settlement&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;39<br \/>\n         9.2      Delivery of Instruments of Transfer&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.39<br \/>\n         9.3      Unocal&#8217;s Representations and Warranties True and Correct&#8230;.39<br \/>\n         9.4      Officer&#8217;s Certificate&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;39<br \/>\n         9.5      Opinion of Counsel&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;39<br \/>\n<\/c><\/s><\/table>\n<p>                                      iii<\/p>\n<p>   5<\/p>\n<table>\n<p><s>                                                                           <c><br \/>\n         9.6      Pre-Closing Performance&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.40<br \/>\n         9.7      Authorization&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..40<br \/>\n         9.8      Absence of Litigation&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;40<br \/>\n         9.9      Hart-Scott Rodino Act&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;40<br \/>\n         9.10     Stock Ownership and Registration Rights Agreement&#8230;&#8230;&#8230;..40<br \/>\n         9.11     Consents&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.40<br \/>\n         9.12     Satisfactory Results of Buyer&#8217;s Diligence&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.40<br \/>\n         9.13     No Material Changes&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..40<\/p>\n<p>SECTION 10<\/p>\n<p>         COVENANTS&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;41<br \/>\n         10.1     Investigation and Decision&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.41<br \/>\n         10.2     Access to Information&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;42<br \/>\n         10.3     Gas Imbalances and Pipeline Imbalances&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.43<br \/>\n         10.4     Hart-Scott-Rodino Act&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;44<br \/>\n         10.5     Third-Party Consents&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.44<br \/>\n         10.6     Completion of Due Diligence&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;45<br \/>\n         10.7     Additional Agreements&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;45<br \/>\n         10.8     Payment of Certain Expenses Due and Payable After the<br \/>\n                  Closing Date&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;45<br \/>\n         10.9     Notification of Certain Matters&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..45<br \/>\n         10.10    Announcements&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..46<br \/>\n         10.11    Termination of Guarantees and Other Commitments&#8230;&#8230;&#8230;&#8230;.46<br \/>\n         10.12    Access to Geologic and Geophysical Information&#8230;&#8230;&#8230;&#8230;..46<br \/>\n         10.13    Collection of Certain Insurance Proceeds&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..47<\/p>\n<p>SECTION 11<\/p>\n<p>         EMPLOYEE MATTERS&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..47<br \/>\n         11.1     Offer to Employees&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;47<br \/>\n         11.2     Recognition of Service Time&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;47<br \/>\n         11.3     Hired Employee List&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..47<br \/>\n         11.4     Terminated Employees&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.47<br \/>\n         11.5     Employment Restriction&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..47<\/p>\n<p>SECTION 12<\/p>\n<p>         TAXES&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.48<br \/>\n         12.1     Apportionment of Ad Valorem and Property Taxes&#8230;&#8230;&#8230;&#8230;..48<br \/>\n         12.2     Sales Taxes, Filing Fees, Etc&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.48<br \/>\n         12.3     Other Taxes&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.48<br \/>\n<\/c><\/s><\/table>\n<p>                                       iv<\/p>\n<p>   6<\/p>\n<table>\n<p><s>                                                                           <c><br \/>\nSECTION 13<\/p>\n<p>         TERMINATION&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.48<br \/>\n         13.1     Termination&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.49<br \/>\n         13.2     Effect of Termination&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;49<br \/>\n         13.3     Specific Performance&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.49<\/p>\n<p>SECTION 14<\/p>\n<p>         SURVIVAL AND INDEMNIFICATION&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..49<br \/>\n         14.1     Survival&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.49<br \/>\n         14.2     Indemnification&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;50<br \/>\n         14.3     Third Party Claims&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;51<br \/>\n         14.4     Method of Asserting Claims&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.51<br \/>\n         14.5     Right to Cure&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..54<br \/>\n         14.6     Exclusive Remedy&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..54<br \/>\n         14.7     RELEASE, INDEMNITY AND WAIVER&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.54<\/p>\n<p>SECTION 15<\/p>\n<p>         CLOSING&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..55<br \/>\n         15.1     Time of Essence&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;55<br \/>\n         15.2     Place and Date&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.55<br \/>\n         15.3     Unocal&#8217;s Actions at Closing&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;55<br \/>\n         15.4     Buyer&#8217;s Actions at Closing&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.57<br \/>\n         15.5     Closing Statement&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.57<br \/>\n         15.6     Notices&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..57<\/p>\n<p>SECTION 16 ACTIONS AFTER CLOSING&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.58<br \/>\n         16.1     Final Accounting&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..58<br \/>\n         16.2     Receipts and Credits&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.58<br \/>\n         16.3     Suspended Funds&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;59<br \/>\n         16.4     Further Assurances&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;59<br \/>\n         16.5     Recording&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;59<br \/>\n         16.6     Books and Records&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.59<br \/>\n         16.7     Post Closing Access to Properties and Records by Unocal&#8230;..60<\/p>\n<p>SECTION 17<\/p>\n<p>         MISCELLANEOUS&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..60<br \/>\n<\/c><\/s><\/table>\n<p>                                       v<\/p>\n<p>   7<\/p>\n<table>\n<p><s>                                                                           <c><br \/>\n         17.1     Governing Law&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..60<br \/>\n         17.2     Assignment&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..60<br \/>\n         17.3     Written Notices&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;61<br \/>\n         17.4     Expenses&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.62<br \/>\n         17.5     Waiver of Compliance with Bulk Transfer Laws&#8230;&#8230;&#8230;&#8230;&#8230;.62<br \/>\n         17.6     WAIVER OF CONSUMER RIGHTS&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..62<br \/>\n         17.7     Waiver of Jury Trial&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.63<br \/>\n         17.8     WAIVER OF PUNITIVE AND CONSEQUENTIAL DAMAGES&#8230;&#8230;&#8230;&#8230;&#8230;.63<br \/>\n         17.9     No Admissions&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..63<br \/>\n         17.10    Use of Unocal&#8217;s Name&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.63<br \/>\n         17.11    Entire Agreement, Etc&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;63<br \/>\n         17.12    Parties in Interest&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..64<br \/>\n         17.13    Severability&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;64<br \/>\n         17.14    Consents&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.64<br \/>\n<\/c><\/s><\/table>\n<p>                                       vi<\/p>\n<p>   8<\/p>\n<p>                       SCHEDULE OF SCHEDULES AND EXHIBITS<\/p>\n<table>\n<p><s>                  <c>  <c><br \/>\nSchedule 2.1(i)        &#8211;   LEASEHOLD INTERESTS<br \/>\nSchedule 2.1(ii)       &#8211;   OIL &amp; GAS PROPERTIES<br \/>\nSchedule 2.1(iii)      &#8211;   LISBON PLANT<br \/>\nSchedule 2.1(vi)       &#8211;   PERSONAL PROPERTY, WAREHOUSE STOCK AND IDLE EQUIPMENT<br \/>\nSchedule 2.1(ix)       &#8211;   PIPELINE ASSETS<br \/>\nSchedule 2.1(xii)      &#8211;   VEHICLES<br \/>\nSchedule 2.2(ii)       &#8211;   EXCLUDED INTERESTS<br \/>\nSchedule 3.8           &#8211;   PREFERENTIAL RIGHTS<br \/>\nSchedule 4.7           &#8211;   QUALIFIED CLAIM COST SHARING ALLOCATION<br \/>\nSchedule 6.6           &#8211;   GAS AND PIPELINE BALANCING SCHEDULE<br \/>\nSchedule 6.8           &#8211;   ENVIRONMENTAL DISCLOSURE SCHEDULE<br \/>\nSchedule 6.12          &#8211;   CURRENT COMMITMENTS<br \/>\nSchedule 9.11          &#8211;   CONSENTS<br \/>\nSchedule 11.1          &#8211;   LISBON PLANT-BASED EMPLOYEES<br \/>\n<\/c><\/c><\/s><\/table>\n<p>                                    EXHIBITS<\/p>\n<table>\n<p><s>             <c>       <c><br \/>\nExhibit &#8220;A&#8221;       &#8211;        CLAIM VALUE FORMULA AND ALLOCATED VALUES SCHEDULE<br \/>\nExhibit &#8220;B&#8221;       &#8211;        ARBITRATION PROCEDURES<br \/>\nExhibit &#8220;C&#8221;       &#8211;        ENVIRONMENTAL ASSESSMENTS<br \/>\nExhibit &#8220;D&#8221;       &#8211;        UNOCAL DISCLOSURE SCHEDULE<br \/>\nExhibit &#8220;E-1&#8221;     &#8211;        GEOPHYSICAL DATA LICENSING AGREEMENT<br \/>\nExhibit &#8220;E-2&#8221;     &#8211;        GEOPHYSICAL DATA<br \/>\nExhibit &#8220;F-1&#8221;     &#8211;        ASSIGNMENT OF LEASES, BILL OF SALE AND ASSIGNMENT OF INTANGIBLE<br \/>\n                           CONTRACTUAL RIGHTS AND OTHER INTANGIBLE PROPERTY<br \/>\nExhibit &#8220;F-2&#8221;     &#8211;        RIGHT-OF-WAY ASSIGNMENT AND BILL OF SALE<br \/>\nExhibit &#8220;F-3&#8221;     &#8211;        TERM ROYALTY DEED ROYALTIES<br \/>\nExhibit &#8220;G&#8221;       &#8211;        ASSUMPTION AGREEMENT<br \/>\nExhibit &#8220;H-1&#8221;     &#8211;        BUYER&#8217;S SATISFACTORY COMPLETION OF DUE DILIGENCE<br \/>\nExhibit &#8220;H-2&#8221;     &#8211;        UNOCAL&#8217;S SATISFACTORY COMPLETION OF DUE DILIGENCE<br \/>\nExhibit &#8220;I&#8221;       &#8211;        LEASE AGREEMENT<br \/>\nExhibit &#8220;J&#8221;       &#8211;        STOCK OWNERSHIP AND REGISTRATION RIGHTS AGREEMENT<br \/>\n<\/c><\/c><\/s><\/table>\n<p>                                      vii<\/p>\n<p>   9<\/p>\n<p>                          PURCHASE AND SALE AGREEMENT<\/p>\n<p>         THIS PURCHASE AND SALE AGREEMENT is entered into as of the 8th day of<br \/>\nJune, 1999, by and between Union Oil Company of California, a California<br \/>\ncorporation, with an office at 14141 Southwest Freeway, Sugar Land, Texas 77478<br \/>\n(hereinafter referred to as &#8220;Unocal&#8221;), and Tom Brown, Inc., a Delaware<br \/>\ncorporation, whose address is 508 West Wall, Suite 500, Midland, Texas 79702<br \/>\n(referred to herein as &#8220;Buyer&#8221; or &#8220;TBI&#8221;).<\/p>\n<p>                                    RECITALS<\/p>\n<p>         WHEREAS, Unocal and its subsidiary Unocal Pipeline Co. (&#8220;Pipeline&#8221;)<br \/>\nare the holders of certain assets which include certain oil and gas interests<br \/>\nand properties in the states of Colorado, Wyoming, North Dakota and Utah, a gas<br \/>\nprocessing and treatment plant in San Juan County, Utah and an approximate 66<br \/>\nmile, 10 inch pipeline from such plant to Aneth, Utah; and<\/p>\n<p>         WHEREAS, Unocal desires to sell assets, as hereinafter described, to<br \/>\nBuyer and Buyer desires to purchase such assets from Unocal, upon the terms and<br \/>\nsubject to the conditions set forth in this Agreement; and<\/p>\n<p>         WHEREAS, as full consideration for the Assets, TBI (i) will issue to<br \/>\nUnocal 5.8 million shares of fully paid, non-assessable common stock of TBI,<br \/>\npar value of $0.10 per share (the &#8220;Common Stock&#8221;) and (ii) pay Unocal five<br \/>\nmillion dollars ($5,000,000) in cash subject to adjustments as described<br \/>\nherein;<\/p>\n<p>         NOW, THEREFORE, in consideration of the covenants and agreements<br \/>\ncontained herein, Unocal and Buyer agree as follows:<\/p>\n<p>                                   SECTION 1<\/p>\n<p>                                  DEFINITIONS<\/p>\n<p>1.1      DEFINED TERMS: The following terms, when capitalized in this<br \/>\n         Agreement, shall have the meanings defined either in this Section or<br \/>\n         elsewhere in this Agreement.<\/p>\n<p>&#8220;ADJUSTED CASH PURCHASE PRICE&#8221; shall have the meaning specified in Section 2.5.<\/p>\n<p>&#8220;ACCRUING&#8221; or &#8220;ACCRUED&#8221; means, with respect to any obligation, duty, loss,<br \/>\nliability, claim, fine, expense, damage, cost or penalty, the occurring or<br \/>\nhappening of any event which causes such obligation, duty, loss, liability,<br \/>\nclaim, fine, expense, damage, cost or penalty to become demandable, requirable,<br \/>\nassertible, enforceable, due and owing, or being incurred or occurring, as the<br \/>\ncase may be.<\/p>\n<p>                                       1<\/p>\n<p>   10<\/p>\n<p>&#8220;AFFILIATE&#8221; means, with respect to any specified Person, any other Person<br \/>\ndirectly or indirectly controlling, controlled by, or under common control<br \/>\nwith, such Person. For purposes of this definition, &#8220;control&#8221; shall mean the<br \/>\npossession, directly or indirectly, of the power to direct or cause the<br \/>\ndirection of the management and policies of such Person, whether through the<br \/>\nownership of voting securities or otherwise.<\/p>\n<p>&#8220;AGREEMENT&#8221; means this Purchase and Sale Agreement, including all Schedules and<br \/>\nExhibits.<\/p>\n<p>&#8220;ALLOCATED VALUE(S)&#8221; means the value of certain of the Assets as set forth in<br \/>\nExhibit A.<\/p>\n<p>&#8220;ASSETS&#8221; shall have the meaning specified in Section 2.1.<\/p>\n<p>&#8220;ASSUMED LIABILITIES&#8221; means all Environmental Liabilities, General Liabilities,<br \/>\nPlugging and Abandonment Obligations and other liabilities expressly assumed by<br \/>\nBuyer under the terms of this Agreement.<\/p>\n<p>&#8220;CASH SETTLEMENT&#8221; shall have the meaning specified in Section 2.6.<\/p>\n<p>&#8220;CASUALTY LOSS&#8221; means a loss of personalty, excluding oil, gas and other<br \/>\nminerals in place, that is caused by a sudden, unexpected and unusual event.<\/p>\n<p>&#8220;CLAIM NOTICE&#8221; means notification by an Indemnified Party to an Indemnifying<br \/>\nParty of any claim or demand for which the Indemnifying Party would be liable<br \/>\nhereunder, and providing information which specifies the nature and basis of<br \/>\nthe claim or demand and the amount or the estimated amount of the claim or<br \/>\ndemand.<\/p>\n<p>&#8220;CLAIM VALUE&#8221; shall have the meaning specified in Section 3.4.<\/p>\n<p>&#8220;CLAIM VALUE FORMULA&#8221; shall have the meaning specified in Exhibit &#8220;A,&#8221; or if<br \/>\nnone is provided therein, the claim value formula mutually agreed to by the<br \/>\nparties in writing.<\/p>\n<p>&#8220;CLOSING&#8221; means the consummation of the transactions contemplated in this<br \/>\nAgreement other than any transactions specifically scheduled for a time after<br \/>\nClosing by the terms hereof.<\/p>\n<p>&#8220;CLOSING DATE&#8221; means the date specified in Section 15.2, or such other date as<br \/>\nthe parties may mutually agree upon in writing.<\/p>\n<p>&#8220;CONFIDENTIALITY AGREEMENT&#8221; means those Confidentiality Agreements between the<br \/>\nParties dated June 16, 1998, and any amendments thereto, executed prior to and<br \/>\nin conjunction with and for the purposes of this Agreement.<\/p>\n<p>                                       2<\/p>\n<p>   11<\/p>\n<p>&#8220;CONTRACT RIGHTS&#8221; means the Assets described in Section 2.1(vii).<\/p>\n<p>&#8220;DEFECT VALUE&#8221; shall have the meaning specified in Section 3.5.<\/p>\n<p>&#8220;DEFENSIBLE TITLE&#8221; means title which is determinable of record, and is free of<br \/>\nliens, claims, defects, encumbrances or deficiencies other than Permitted<br \/>\nEncumbrances.<\/p>\n<p>&#8220;DELETERIOUS SUBSTANCE&#8221; means (i) any substance, product, waste or other<br \/>\nmaterial of any nature whatsoever which is or becomes listed as a hazardous<br \/>\nsubstance, hazardous waste, hazardous material or pollutant under any<br \/>\nEnvironmental Laws; (ii) any substance, product, waste or other material of any<br \/>\nnature whatsoever which may give rise to liability under any Environmental<br \/>\nLaws; (iii) petroleum and its fractions, crude oil and other petroleum<br \/>\nproducts; and (iv) radioactive materials including but not limited to naturally<br \/>\noccurring radioactive materials.<\/p>\n<p>&#8220;DUE DILIGENCE PERIOD&#8221; means the time period between the date hereof and seven<br \/>\n(7) calendar days prior to the Closing Date.<\/p>\n<p>&#8220;EFFECTIVE DATE&#8221; means 8:00 a.m. Central Standard Time, on January 1, 1999.<\/p>\n<p>&#8220;EMPLOYEE RELATED LIABILITIES&#8221; means obligations, duties and liabilities for<br \/>\nclaims made by, or relating to, Unocal employees or consultants which Accrued<br \/>\nand are attributable to periods, prior to the Closing Date.<\/p>\n<p>&#8220;ENVIRONMENTAL ASSESSMENTS&#8221; shall have the meaning specified in Exhibit &#8220;C&#8221; or<br \/>\nin Section 4.4.<\/p>\n<p>&#8220;ENVIRONMENTAL DISCLOSURE SCHEDULE&#8221; means Schedule 6.8 to this Agreement.<\/p>\n<p>&#8220;ENVIRONMENTAL LAWS&#8221; means any applicable laws, orders, rules, regulations,<br \/>\njudgments or decrees of any federal, state, tribal, county or municipal<br \/>\ngoverning authority having jurisdiction over any Asset or Party which relate to<br \/>\npollution, the protection or cleanup of the environment, or the release or<br \/>\ndisposal of Deleterious Substances into the environment, including but not<br \/>\nlimited to ambient air, surface water, groundwater, land surface or subsurface<br \/>\nstrata; including all such laws, orders, rules, regulations, judgments or<br \/>\ndecrees as they may be amended, varied or modified in the future.<\/p>\n<p>&#8220;ENVIRONMENTAL LIABILITIES&#8221; means all obligations, duties, losses, liabilities,<br \/>\nclaims, fines, expenses, damages, costs (including attorney&#8217;s fees and<br \/>\nexpenses) or penalties created by, related to, or arising out of any<br \/>\nEnvironmental Law, whether Accruing before or after the Effective Date;<br \/>\nexcluding all Plugging and Abandonment Obligations.<\/p>\n<p>&#8220;EXCLUDED ASSETS&#8221; shall have the meaning specified in Section 2.2.<\/p>\n<p>                                       3<\/p>\n<p>   12<\/p>\n<p>&#8220;EXECUTION DATE&#8221; means the date on which this Agreement has been fully executed<br \/>\nby Unocal and TBI.<\/p>\n<p>&#8220;FACILITIES&#8221; shall have the meaning specified in Section 2.1(iv).<\/p>\n<p>&#8220;FINAL ACCOUNTING&#8221; shall have the meaning specified in Section 16.1.<\/p>\n<p>&#8220;GAS IMBALANCE&#8221; means the difference between the volume of produced gas that<br \/>\nUnocal took from an Asset(s) and the volume of Unocal&#8217;s gas entitlement for<br \/>\nsuch Asset(s).<\/p>\n<p>&#8220;GENERAL LIABILITIES&#8221; means all obligations, duties, losses, liabilities,<br \/>\nclaims, fines, expenses, damages, costs (including attorneys fees and expenses)<br \/>\nor penalties created by, related to, or arising out of ownership or operation<br \/>\nof the Assets, any Contract Rights, or compliance with any applicable law,<br \/>\norder, rule, regulation, judgment or decree of any federal, state, tribal,<br \/>\ncounty or municipal governing authority having jurisdiction over the Assets or<br \/>\nthe Parties, whether Accruing before or after the Effective Date.<br \/>\nNotwithstanding the above, the term &#8220;General Liabilities&#8221; shall not include:<\/p>\n<p>                    (a) Plugging and Abandonment Obligations (which are<br \/>\n               addressed elsewhere herein);<\/p>\n<p>                    (b) Environmental Liabilities (which are addressed<br \/>\n               elsewhere herein);<\/p>\n<p>                    (c) Pre-Effective Date Royalties and Tax Payments;<\/p>\n<p>                    (d) Employee Related Liabilities;<\/p>\n<p>                    (e) All items of threatened or pending litigation and<br \/>\n               proceedings set forth in Paragraph A of Exhibit D attached<br \/>\n               hereto to the extent attributable to monetary damages relating<br \/>\n               to Pre-Effective Date periods; and<\/p>\n<p>                    (f) General Liabilities (exclusive of items (a) through (e)<br \/>\n               above) which Accrued prior to the Effective Date which are in<br \/>\n               excess of $200,000 in the aggregate and are asserted pursuant to<br \/>\n               written claims made by third parties to Unocal or Buyer within<br \/>\n               five (5) years after the Closing Date.<\/p>\n<p>For purposes of clarification, (i) Buyer acknowledges that Buyer shall have<br \/>\nresponsibility for (x) the initial $200,000 in the aggregate of General<br \/>\nLiabilities which Accrued prior to the Effective Date and are asserted within<br \/>\nfive (5) years after the Closing Date, (y) any General Liabilities which<br \/>\nAccrued prior to the Effective Date which are not asserted in writing by third<br \/>\nparties against Unocal or Buyer within five (5) years after the Closing Date;<br \/>\nand (z) any General Liabilities which Accrue after the Effective Date and (ii)<br \/>\nUnocal acknowledges that Unocal shall have responsibility for (x)<\/p>\n<p>                                       4<\/p>\n<p>   13<\/p>\n<p>liabilities pertaining to Excluded Assets, (y) liabilities referenced in<br \/>\nsubsections (c), (d), (e) and (f) above and (z) liabilities with respect to a<br \/>\nportion of the Qualified Claims to the extent expressly provided in Section 4<br \/>\nhereof.<\/p>\n<p>&#8220;GEOPHYSICAL DATA LICENSING AGREEMENT&#8221; means the agreement attached hereto and<br \/>\ndesignated as Exhibit &#8220;E-1.&#8221;<\/p>\n<p>&#8220;GEOPHYSICAL SEISMIC LICENSING PRICE&#8221; means the initial fee of $1.00, together<br \/>\nwith all other fees and charges described in the Geophysical Data Licensing<br \/>\nAgreement, which TBI will pay to Unocal to license the Geophysical Data<br \/>\ndescribed in the Geophysical Data Licensing Agreement.<\/p>\n<p>&#8220;GOVERNMENTAL APPROVALS&#8221; means consents, approvals, authorizations or orders<br \/>\nrequired to be obtained from any court or tribunal in any jurisdiction or any<br \/>\npublic, or governmental or regulatory body, agency, department, commission,<br \/>\nboard, bureau or other authority or instrumentality.<\/p>\n<p>&#8220;GOVERNMENTAL LESSOR APPROVALS&#8221; means consents, approvals, authorizations or<br \/>\norders required to be obtained from any court or tribunal in any jurisdiction<br \/>\nor any public, or governmental or regulatory body, agency, department,<br \/>\ncommission, board, bureau or other authority or instrumentality which is a<br \/>\nlessor under any of the Leasehold Interests other than consents, approvals,<br \/>\nauthorizations or orders of a nature customarily obtained following the closing<br \/>\nof a transaction.<\/p>\n<p>&#8220;HART-SCOTT-RODINO ACT&#8221; means the Hart-Scott-Rodino Antitrust Improvements Act<br \/>\nof 1976, as amended, and the rules and regulations promulgated thereunder.<\/p>\n<p>&#8220;HYDROCARBONS&#8221; shall mean all severed crude oil, natural gas, casinghead gas,<br \/>\ndrip gasoline, natural gasoline, petroleum, natural gas liquids, plant<br \/>\nproducts, condensate, and other liquid and gaseous hydrocarbons and minerals of<br \/>\nevery kind and description.<\/p>\n<p>&#8220;INDEMNIFIED PARTY&#8221; and &#8220;INDEMNIFYING PARTY&#8221; shall have the meaning specified<br \/>\nin Section 14.4.<\/p>\n<p>&#8220;KNOWLEDGE&#8221; means the actual knowledge of the applicable Party&#8217;s officers and<br \/>\nsalaried employees directly, immediately and materially involved in the<br \/>\ntransactions which are the subject matter of this Agreement, and that are equal<br \/>\nto or above the level of asset manager in the applicable Party&#8217;s management<br \/>\nstructure.<\/p>\n<p>&#8220;LEASE AGREEMENT&#8221; means the oil, gas and mineral lease from Unocal to Buyer<br \/>\nwith respect to Parachute Creek, Colorado, in the form of Exhibit &#8220;I&#8221; attached<br \/>\nhereto.<\/p>\n<p>&#8220;LEASEHOLD INTERESTS&#8221; means the Assets described in Section 2.1(i).<\/p>\n<p>                                       5<\/p>\n<p>   14<\/p>\n<p>&#8220;LIENS&#8221; means any and all liens, mortgages, charges, pledges, security<br \/>\ninterests, or other similar type encumbrances, including, but not limited to,<br \/>\nsuch as may arise under any contracts or judgments.<\/p>\n<p>&#8220;LISBON PLANT&#8221; shall have the meaning specified in Section 2.1(iii).<\/p>\n<p>&#8220;MATERIAL ENVIRONMENTAL DEFICIENCY&#8221; means a deficiency or deficiencies in the<br \/>\nAssets arising out of the Environmental Liabilities for which the cumulative<br \/>\nestimated Remediation Cost will create a liability for which Buyer will be<br \/>\nresponsible in an amount in excess of $3,500,000 and which requires remediation<br \/>\nor cleanup under currently applicable Environmental Laws which remediation and<br \/>\ncleanup obligations are not (i) merely speculative, contingent obligations<br \/>\nwhich could arise in the future and are currently uncertain or (ii) remediation<br \/>\nand cleanup obligations which could be anticipated to arise upon plugging and<br \/>\nabandonment of the applicable assets.<\/p>\n<p>&#8220;MINIMAL ENVIRONMENTAL LIABILITIES&#8221; shall have the meaning specified in Section<br \/>\n4.7(a)(i).<\/p>\n<p>&#8220;NEGATIVE PIPELINE IMBALANCE&#8221; shall mean the (a) total quantity of Hydrocarbons<br \/>\n(expressed in MMBtus) by which the cumulative total receipts of Hydrocarbons<br \/>\nfrom a shipper on the Pipeline Assets exceeds the cumulative total deliveries<br \/>\nof Hydrocarbons to the shipper on the Pipeline Assets, determined as of the<br \/>\nEffective Date, and (b) the total quantity of Hydrocarbons (expressed in<br \/>\nMMBtus) by which the total cumulative nominated and confirmed deliveries of<br \/>\nHydrocarbons to an interconnected third party pipeline on the Pipeline Assets<br \/>\nexceeds the total cumulative actual deliveries of Hydrocarbons to the<br \/>\ninterconnected third party pipeline on the Pipeline Assets, as of the Effective<br \/>\nDate.<\/p>\n<p>&#8220;NORM&#8221; means naturally occurring radioactive material.<\/p>\n<p>&#8220;OIL AND GAS PROPERTIES&#8221; means the Assets described in Section 2.1(ii).<\/p>\n<p>&#8220;PARTY&#8221; or &#8220;PARTIES&#8221; means Unocal or TBI, or Unocal and TBI respectively.<\/p>\n<p>&#8220;PARTY ADVERSE EFFECT&#8221; shall mean an event, taking into account all facts and<br \/>\ncircumstances, on the business, properties, condition (financial or otherwise)<br \/>\nor operations of a Party, which has had or could reasonably be expected to have<br \/>\na material adverse effect on the ability of such Party to perform its<br \/>\nobligations under this Agreement.<\/p>\n<p>&#8220;PERMITS&#8221; means any and all permits, including temporary permits to construct<br \/>\nor operate, authorizations, approvals, registrations, rights of way, orders,<br \/>\nwaivers, variances or other licenses issued or granted by any federal, state,<br \/>\ntribal or local administrative or governmental authority, bureau or agency.<\/p>\n<p>                                       6<\/p>\n<p>   15<\/p>\n<p>&#8220;PERMITTED ENCUMBRANCES&#8221; means (i) liens for taxes, assessments or other<br \/>\ngovernmental charges or levies not yet delinquent; (ii) liens in connection<br \/>\nwith workers&#8217; compensation, unemployment insurance or other social security,<br \/>\nold-age pension or public liability obligations which are not yet due or<br \/>\ndelinquent; (iii) liens in favor of vendors, carriers, warehousemen, repairmen,<br \/>\nmechanics, workmen, materialmen, construction or similar liens arising by<br \/>\noperation of law in the ordinary course of business as to obligations which are<br \/>\nnot yet delinquent or which have not been filed pursuant to law; (iv) rights to<br \/>\nconsent by, required notices to, filing with, or other actions by governmental<br \/>\nentities in connection with the sale or conveyance of the applicable property<br \/>\nif the same are customarily obtained subsequent to such sale or conveyance; (v)<br \/>\neasements, rights of way, restrictions, encroachments and other similar<br \/>\nencumbrances, and minor defects in the chain of title which do not materially<br \/>\ninterfere with the continued current use of the applicable property or<br \/>\nmaterially detract from the value of such property; (vi) rights of utility<br \/>\ncompanies to lay, maintain and repair pipelines, conduits, cable boxes and<br \/>\nother installations on, under, and across the applicable property; (vii) rights<br \/>\nreserved to or vested in any municipality or governmental, statutory or public<br \/>\nauthority to control or regulate any interest in any manner, and all applicable<br \/>\nlaws, rules and orders of such authority; (viii) any Lien or encumbrance in the<br \/>\nform of a judgment secured by a supersedeas bond or other security approved by<br \/>\na court of competent jurisdiction; and (ix) all matters disclosed in the Unocal<br \/>\nDisclosure Schedule or Environmental Disclosure Schedule which affect the<br \/>\nquality or quantity of title.<\/p>\n<p>&#8220;PERSON&#8221; means any individual, partnership, joint venture, firm, corporation,<br \/>\nassociation, trust, limited liability company, estate, unincorporated<br \/>\norganization or other entity, and their successors and assigns; or any<br \/>\ngovernmental or political subdivision, including any agency, department or<br \/>\ninstrumentality thereof.<\/p>\n<p>&#8220;PIPELINE ASSETS&#8221; shall have the meaning specified in Section 2.1(ix).<\/p>\n<p>&#8220;PIPELINE IMBALANCE&#8221; shall mean the net pipeline imbalance position of the<br \/>\nCompany (expressed in MMBtus) taking into consideration the Positive Pipeline<br \/>\nImbalance and the Negative Pipeline Imbalance.<\/p>\n<p>&#8220;PLUGGING AND ABANDONMENT OBLIGATIONS&#8221; means all usual and normal prudent<br \/>\noperations for the plugging, abandonment, surface restoration, site clearance,<br \/>\nand disposal of related waste materials, including NORM and asbestos, of all<br \/>\noil, gas injection, water or other wells, sumps, pits, ponds, tanks,<br \/>\nimpoundments, foundations, pipelines, structures and equipment of any kind or<br \/>\ndescription on the Assets, in compliance with all applicable contractual<br \/>\nobligations and applicable rules and regulations of governmental bodies having<br \/>\njurisdiction over the Assets. Plugging and Abandonment Obligations do not<br \/>\ninclude cleanup of polluted lands, air or water other than routine cleanup<br \/>\nnormally associated with plugging and abandonment, such cleanup obligations<br \/>\nwhich are other than routine being included within the definition of<br \/>\nEnvironmental Liabilities.<\/p>\n<p>                                       7<\/p>\n<p>   16<\/p>\n<p>&#8220;POSITIVE PIPELINE IMBALANCE&#8221; shall mean (a) the total quantity of Hydrocarbons<br \/>\n(expressed in MMBtus) by which the cumulative total deliveries of Hydrocarbons<br \/>\nto a shipper on the Pipeline Assets exceeds the total cumulative receipts of<br \/>\nHydrocarbons from the shipper on the Pipeline Assets, determined as of the<br \/>\nEffective Date and (b) the total quantity of Hydrocarbons (expressed in MMBtus)<br \/>\nby which the total cumulative actual deliveries of Hydrocarbons to an<br \/>\ninterconnected third party pipeline on the Pipeline Assets exceeds the total<br \/>\ncumulative nominated and confirmed deliveries of Hydrocarbons to the<br \/>\ninterconnected third party pipeline on the Pipeline Assets, determined as of<br \/>\nthe Effective Date.<\/p>\n<p>&#8220;PRE-EFFECTIVE DATE ROYALTIES AND TAX PAYMENTS&#8221; means all obligations, duties<br \/>\nor liabilities for the payment of royalties and taxes in respect of oil and gas<br \/>\nproduction from the Assets (including penalties and interest relating thereto)<br \/>\nwhich Accrued and are attributable to periods prior to the Effective Date.<\/p>\n<p>&#8220;PURCHASE PRICE&#8221; shall have the meaning specified in Section 2.3.<\/p>\n<p>&#8220;QUALIFIED CLAIM&#8221; means an unknown Environmental Liability which Accrued prior<br \/>\nto the Effective Date, and which is the subject of a specific written claim<br \/>\nasserting Unocal&#8217;s or TBI&#8217;s responsibility made and asserted during the twelve<br \/>\n(12) month period following the Closing Date either by a governmental entity or<br \/>\nby a third party that is not an Affiliate of TBI with a Claim Notice provided<br \/>\nby TBI to Unocal at once but in no case later than thirty (30) days after TBI&#8217;s<br \/>\nreceipt of such claim; provided, however, Environmental Law for purposes of<br \/>\ndetermining Environmental Liabilities that can be Qualified Claims shall not<br \/>\ninclude Environmental Laws as they may be amended, varied or modified in the<br \/>\nfuture, but shall be limited to Environmental Laws in effect and applicable to<br \/>\nthe Assets as of the Effective Date.<\/p>\n<p>&#8220;QUALIFIED CLAIM COST SHARING ALLOCATION&#8221; shall have the meaning specified in<br \/>\nSection 4.7(a).<\/p>\n<p>&#8220;REMEDIATION COST&#8221; means the cost to remedy or satisfy any Environmental<br \/>\nLiability using the most cost effective methods and manner that satisfy<br \/>\napplicable Environmental Laws, and which are consistent with the continued use<br \/>\nof the affected Assets in the same capacity and for the same purposes as they<br \/>\nwere being used on the Effective Date.<\/p>\n<p>&#8220;SHARES&#8221; shall have the meaning specified in Section 2.3.<\/p>\n<p>&#8220;STOCK OWNERSHIP AND REGISTRATION RIGHTS AGREEMENT&#8221; shall mean Exhibit &#8220;J&#8221; to<br \/>\nthis Agreement<\/p>\n<p>&#8220;SURFACE ACCESS AGREEMENTS&#8221; means the Assets described in Section 2.1(viii).<\/p>\n<p>&#8220;TBI&#8221; means Tom Brown, Inc.<\/p>\n<p>                                       8<\/p>\n<p>   17<\/p>\n<p>&#8220;TBI BALANCE SHEET&#8221; means the consolidated balance sheet of TBI as of December<br \/>\n31, 1998 set forth in the TBI annual report on Form 10-K for the year ended<br \/>\nDecember 31, 1998.<\/p>\n<p>&#8220;TBI BALANCE SHEET DATE&#8221; means December 31, 1998.<\/p>\n<p>&#8220;TITLE DEFECT&#8221; shall have the meaning specified in Section 3.2.<\/p>\n<p>&#8220;UNOCAL&#8221; means Union Oil Company of California.<\/p>\n<p>&#8220;UNOCAL DISCLOSURE SCHEDULE&#8221; means Exhibit &#8220;D&#8221; to this Agreement.<\/p>\n<p>&#8220;WELLS&#8221; means all oil, condensate or natural gas wells located on the Leasehold<br \/>\nInterests and the Oil and Gas Properties, whether producing, shut-in or<br \/>\ntemporarily abandoned.<\/p>\n<p>1.2      UNDEFINED FINANCIAL ACCOUNTING TERMS: Undefined financial accounting<br \/>\n         terms used in this Agreement shall be defined according to generally<br \/>\n         accepted accounting principles.<\/p>\n<p>1.3      REFERENCES: References in this Agreement to Sections or Exhibits shall<br \/>\n         be to the entirety of the Sections or Exhibits of this Agreement which<br \/>\n         are referred to unless expressly limited to a sub-Section in the<br \/>\n         reference. References, if any, in this Agreement to &#8220;hereby&#8221;,<br \/>\n         &#8220;herein&#8221;, &#8220;hereinabove&#8221;, &#8220;hereinafter&#8221;, &#8220;hereinbelow&#8221;, &#8220;hereof&#8221;,<br \/>\n         &#8220;hereunder&#8221;, and words of similar import shall be to this Agreement in<br \/>\n         its entirety and not only to the particular Section or Exhibit in<br \/>\n         which such reference appears unless expressly stated to the contrary.<\/p>\n<p>1.4      CONSTRUCTION: Unless the context otherwise requires: (i) &#8220;or&#8221; is not<br \/>\n         exclusive; (ii) words used in the singular include the plural and<br \/>\n         words used in the plural include the singular; (iii) words used in the<br \/>\n         masculine include the feminine and words used in the feminine include<br \/>\n         the masculine; (iv) any date specified for any action that is not a<br \/>\n         business day as such term is generally defined in the United States of<br \/>\n         America shall be deemed to mean the first business day after such<br \/>\n         date; (v) neither the captions to Sections or paragraphs hereof nor<br \/>\n         the Table of Contents shall be deemed to be a part of the Agreement;<br \/>\n         (vi) the Exhibits form a part of the Agreement and shall have the same<br \/>\n         force and effect as if set out in the body of the Agreement; and (vii)<br \/>\n         references herein to any other agreement or instrument shall, unless<br \/>\n         the context otherwise requires or specifies, be deemed references to<br \/>\n         that agreement or instrument as it may from time to time be changed,<br \/>\n         amended or extended, but shall not be an incorporation by reference<br \/>\n         unless specifically so provided.<\/p>\n<p>                                       9<\/p>\n<p>   18<\/p>\n<p>                                   SECTION 2<\/p>\n<p>                               PURCHASE AND SALE<\/p>\n<p>2.1      ASSETS: Subject to the terms and conditions of this Agreement, Unocal<br \/>\n         shall sell and shall cause Pipeline (as applicable) to sell and TBI<br \/>\n         shall purchase on the Closing Date, effective as of the Effective<br \/>\n         Date, without warranty of title, either express or implied, all of<br \/>\n         Unocal&#8217;s and Pipeline&#8217;s right, title and interest in the following<br \/>\n         assets (collectively, the &#8220;Assets&#8221;):<\/p>\n<p>         (i)   the units, prospects and fields together with the oil, gas and<br \/>\n               other mineral leases described in Schedule 2.1(i) insofar as<br \/>\n               same cover and affect the lands described in Schedule 2.1(i),<br \/>\n               including, but not limited to, working interests, overriding<br \/>\n               royalty interests, royalty interests, reversionary interests,<br \/>\n               net profit interests, net revenue interests, fee mineral estate<br \/>\n               interests and any other interests of a similar nature with<br \/>\n               respect to the oil, gas and other mineral leases referenced on<br \/>\n               Schedule 2.1(i) (it being the intent of the parties that TBI<br \/>\n               receive all of Unocal&#8217;s ownership in such leasehold interests<br \/>\n               even though Unocal&#8217;s interest in such units, prospects and<br \/>\n               fields and oil and gas and other mineral leases may be<br \/>\n               incorrectly described on or inadvertently omitted from Schedule<br \/>\n               2.1(i)) (the &#8220;Leasehold Interests&#8221;);<\/p>\n<p>         (ii)  producing and non-producing wells, saltwater disposal wells,<br \/>\n               other wells or other oil and gas properties located on or<br \/>\n               attributable to the Leasehold Interests, including, but not<br \/>\n               limited to, those described on Schedule 2.1(ii) (&#8220;Oil and Gas<br \/>\n               Properties&#8221;);<\/p>\n<p>         (iii) the Lisbon gas processing and treatment plant and the related<br \/>\n               lands, as described on Schedule 2.1(iii) (the &#8220;Lisbon Plant&#8221;);<\/p>\n<p>         (iv)  the equipment and facilities permanently located on the lands<br \/>\n               described in Sections 2.1(i) and 2.1(ii) or lands pooled or<br \/>\n               unitized therewith including, but not limited to, pumps, surface<br \/>\n               and subsurface well equipment, gas plants, lines and facilities,<br \/>\n               sulfur recovery facilities, compressors, compressor stations,<br \/>\n               dehydration facilities, treating facilities, gathering lines,<br \/>\n               flow lines, valves, meters, separators, tanks, tank batteries,<br \/>\n               and other fixtures (which along with the Lisbon Plant are<br \/>\n               collectively referred to as the &#8220;Facilities&#8221;);<\/p>\n<p>         (v)   the gas, oil, condensate and natural gas liquids produced after<br \/>\n               the Effective Date, including line fill below the pipeline<br \/>\n               connections as of the Effective Date attributable to the<br \/>\n               Leasehold Interests and the Oil and Gas Properties;<\/p>\n<p>         (vi)  all equipment, personal property, warehouse stock and idle<br \/>\n               equipment used solely or held for use in connection with or<br \/>\n               charged to any of the Leasehold Interests or Oil<\/p>\n<p>                                       10<\/p>\n<p>   19<\/p>\n<p>               and Gas Properties, including, without limitation, the items and<br \/>\n               equipment described in Schedule 2.1(vi) ;<\/p>\n<p>        (vii)  all contracts and agreements concerning the properties<br \/>\n               described in Sections 2.1(i), 2.1(ii), 2.1(iii), 2.1(iv) and<br \/>\n               2.1(vi), including, but not limited to, unit agreements, pooling<br \/>\n               agreements, areas of mutual interest agreements, farmout<br \/>\n               agreements, farmin agreements, saltwater disposal agreements,<br \/>\n               water injection agreements, line well injection agreements, road<br \/>\n               use agreements, drilling contracts, operating agreements, well<br \/>\n               service contracts, production sales contracts, gas contracts,<br \/>\n               gas balancing agreements, storage or warehouse agreements,<br \/>\n               supplier contracts, service contracts, construction agreements,<br \/>\n               division orders and transfer orders, insofar as and only insofar<br \/>\n               as they relate to the interests and properties described in<br \/>\n               Sections 2.1(i), 2.1(ii), 2.1(iii), 2.1(iv) and 2.1(vi)<br \/>\n               (&#8220;Contract Rights&#8221;);<\/p>\n<p>        (viii) all surface use agreements, easements, rights of way,<br \/>\n               licenses, authorizations, Permits, and similar rights and<br \/>\n               interests applicable to, or used in connection with, any or all<br \/>\n               of the interests and properties described in Sections 2.1(i),<br \/>\n               2.1(ii), 2.1(iii) and 2.1(iv), including, without limitation,<br \/>\n               those items listed on Schedule 2.1(i) (&#8220;Surface Access<br \/>\n               Agreements&#8221;);<\/p>\n<p>        (ix)   that certain pipeline known as the Aneth Line consisting of<br \/>\n               approximately 66 miles of ten-inch diameter pipe, including<br \/>\n               certain pipelines, tanks, facilities and equipment as described<br \/>\n               in Schedule 2.1(ix), together with easements, rights of way and<br \/>\n               interests directly attributable thereto (collectively, &#8220;Pipeline<br \/>\n               Assets&#8221;);<\/p>\n<p>        (x)    the Lease Agreement;<\/p>\n<p>        (xi)   the net cash proceeds, if any, actually received by Unocal (with<br \/>\n               respect to any claim respecting an event which occurred between<br \/>\n               the Effective Date and the Closing Date) under any policy or<br \/>\n               agreement of insurance or indemnity in favor of Unocal covering<br \/>\n               such claim;<\/p>\n<p>        (xii)  the vehicles and rolling stock described on Schedule 2.1(xii);<br \/>\n               and<\/p>\n<p>        (xiii) those certain term royalties respecting certain Parachute<br \/>\n               Creek properties as described on Exhibit F-3 which will be in a<br \/>\n               form to be mutually agreed by the parties.<\/p>\n<p>2.2  EXCLUDED ASSETS: It is specifically agreed that Unocal is not selling and<br \/>\n     Buyer is not purchasing the following assets (&#8220;Excluded Assets&#8221;):<\/p>\n<p>                                       11<\/p>\n<p>   20<\/p>\n<p>        (i)    all rights and interests of any kind in leases and lands other<br \/>\n               than the Leasehold Interests and Oil and Gas Properties;<\/p>\n<p>        (ii)   any and all interests in the Assets Unocal is legally or<br \/>\n               contractually restricted from selling which are listed on<br \/>\n               Schedule 2.2(ii);<\/p>\n<p>        (iii)  all materials and equipment leased (other than contractual<br \/>\n               lease rights pursuant to any lease included in the Contract<br \/>\n               Rights) or temporarily located on the Leasehold Interests, and<br \/>\n               any materials, equipment, pipelines, facilities or interests in<br \/>\n               the land owned by a purchaser and\/or transporter of oil and\/or<br \/>\n               gas therefrom, a lessor, or a third Person;<\/p>\n<p>        (iv)   all interests in pipelines, facilities, contract rights and<br \/>\n               surface access agreements owned by Unocal that are not used in<br \/>\n               connection with the Assets or which cover lands described in the<br \/>\n               Leasehold Interests and Oil and Gas Properties, but which are<br \/>\n               used solely in connection with properties that are not being<br \/>\n               sold under the terms of this Agreement;<\/p>\n<p>        (v)    any right to use the &#8220;Unocal&#8221; name, marks, trade dress or<br \/>\n               insignia, or to use the name of any other subsidiary of Unocal<br \/>\n               Corporation; and all of Unocal&#8217;s and its Affiliates&#8217;<br \/>\n               intellectual property, including, but not limited to patents,<br \/>\n               trade secrets and copyrights other than intellectual property<br \/>\n               included in the Assets;<\/p>\n<p>        (vi)   all amounts due or payable to Unocal or its Affiliates as<br \/>\n               adjustments or refunds under any contracts affecting the Assets<br \/>\n               and Accruing for all periods of time prior to the Effective<br \/>\n               Date, specifically including, without limitation, amounts<br \/>\n               recoverable from audits under operating agreements;<\/p>\n<p>        (vii)  all rights, titles, claims and interests of Unocal and its<br \/>\n               Affiliates Accruing prior to the Effective Date to or under any<br \/>\n               policy or agreement of insurance or indemnity, any bond, or to<br \/>\n               any insurance proceeds or awards; and any employment,<br \/>\n               consulting, office lease or accounting service contracts;<\/p>\n<p>        (viii) all claims and choses in action of Unocal and its Affiliates<br \/>\n               arising from acts, omissions or events, or damages to or<br \/>\n               destruction of property related to the ownership or operation of<br \/>\n               the Assets and Accruing prior to the Effective Date;<\/p>\n<p>        (ix)   all proceeds, benefits, income or revenue Accruing to the Assets<br \/>\n               prior to the Effective Date, and any claims of Unocal and its<br \/>\n               Affiliates for refunds of or losses carried forwarded with<br \/>\n               respect to taxes attributable to the Assets for any period prior<br \/>\n               to the Effective Date; and<\/p>\n<p>                                       12<\/p>\n<p>   21<\/p>\n<p>         (x)   all geophysical, geological and seismic data, surveys, analysis<br \/>\n               and similar data or information, and all rights therein other<br \/>\n               than as specifically licensed under the Geophysical Data<br \/>\n               Licensing Agreement.<\/p>\n<p>2.3      PURCHASE PRICE: The Purchase Price (&#8220;Purchase Price&#8221;) for the Assets<br \/>\n         shall be (i) 5,800,000 shares (the &#8220;Shares&#8221;) of Common Stock as<br \/>\n         increased to reflect any stock dividend or other adjustment in the<br \/>\n         Common Stock and (ii) the cash amount of $5,000,000, which is subject<br \/>\n         to adjustment as set forth in Sections 2.5 and 2.6.<\/p>\n<p>2.4      PAYMENT PROCEDURES:  Payment shall be made as follows:<\/p>\n<p>         (i)      at Closing, TBI shall pay to Unocal an amount equal to the<br \/>\n                  Adjusted Cash Purchase Price, plus or minus any Cash<br \/>\n                  Settlement (to the extent same is a positive number) by wire<br \/>\n                  transfer of immediately available funds as specified by<br \/>\n                  Unocal;<\/p>\n<p>         (ii)     at Closing, Unocal shall pay to TBI an amount equal to the<br \/>\n                  Adjusted Cash Purchase Price, plus or minus any Cash<br \/>\n                  Settlement (to the extent same is a negative number) by wire<br \/>\n                  transfer of immediately available funds as specified by TBI;<br \/>\n                  and<\/p>\n<p>         (iii)    at Closing, TBI will deliver to Unocal a stock certificate<br \/>\n                  representing the Shares with all taxes, direct or indirect,<br \/>\n                  attributable to the transfer of such Shares paid or provided<br \/>\n                  for.<\/p>\n<p>2.5      ADJUSTED CASH PURCHASE PRICE: The cash portion of the Purchase Price<br \/>\n         shall be adjusted as follows and the resulting amount shall be called<br \/>\n         the &#8220;Adjusted Cash Purchase Price&#8221;:<\/p>\n<p>         (i)      plus or minus any adjustments for Title Defects; minus<\/p>\n<p>         (ii)     the Allocated Value of any part of the Assets sold to a third<br \/>\n                  Person pursuant to the exercise of a preferential purchase<br \/>\n                  right; plus<\/p>\n<p>         (iii)    the Geophysical Seismic Licensing Price; plus or minus<\/p>\n<p>         (iv)     the value of the Gas Imbalance and Pipeline Imbalance shown<br \/>\n                  on Schedule 6.6, as calculated pursuant to Section 10.3<br \/>\n                  hereof.<\/p>\n<p>2.6      CASH SETTLEMENT: The sum (&#8220;Cash Settlement&#8221;) due to settle accounts<br \/>\n         until the Final Accounting shall be determined by Unocal for Closing<br \/>\n         purposes by adding or subtracting from the Adjusted Cash Purchase<br \/>\n         Price as follows (and to the extent that such adjustments involve<br \/>\n         estimates or unliquidated amounts, then such estimates and<br \/>\n         unliquidated amounts shall be mutually agreed to by the parties not<br \/>\n         less than three (3) days prior to the Closing):<\/p>\n<p>                                       13<\/p>\n<p>   22<\/p>\n<p>         (i)      add the amount of expenditures (or estimated expenditures as<br \/>\n                  agreed) made by Unocal that are attributable to the Assets<br \/>\n                  for the period between the Effective Date and Closing Date<br \/>\n                  including, without limitation, royalties, taxes, rentals and<br \/>\n                  similar charges and expenses, including those billed under<br \/>\n                  applicable operating agreements, and all prepaid expenses;<\/p>\n<p>         (ii)     subtract the amount of revenues (or estimated revenues as<br \/>\n                  agreed) received by Unocal in connection with sales of<br \/>\n                  Hydrocarbons and associated products from the Assets,<br \/>\n                  together with any other income from the Assets, Accruing<br \/>\n                  after the Effective Date, excluding revenues (or estimated<br \/>\n                  revenues as agreed) from the sale of liquid Hydrocarbons in<br \/>\n                  storage tanks above the pipeline connection on the Effective<br \/>\n                  Date valued at market or contract prices in effect as of the<br \/>\n                  Effective Date after deducting royalty and tax obligations;<\/p>\n<p>         (iii)    add the sum of $15,000 per month for each month or portion<br \/>\n                  thereof from the Effective Date to the Closing Date as<br \/>\n                  compensation or reimbursement to Unocal for its<br \/>\n                  administrative costs incurred in issuing royalty and rental<br \/>\n                  checks and continuing to perform accounting obligations for<br \/>\n                  the Assets; and<\/p>\n<p>         (iv)     add the sum of $7,260 per month for each month or portion<br \/>\n                  thereof from the Effective Date to the Closing Date as<br \/>\n                  compensation or reimbursement to Unocal for assuming the risk<br \/>\n                  of Casualty Loss in respect of the Assets until the Closing<br \/>\n                  Date.<\/p>\n<p>2.7      ASSUMPTION AGREEMENT: At the Closing, Buyer shall be deemed to have<br \/>\n         assumed the Assumed Liabilities and shall enter into an Assumption<br \/>\n         Agreement to acknowledge its assumption of the Assumed Liabilities.<\/p>\n<p>                                   SECTION 3<\/p>\n<p>                               TITLE EXAMINATION<\/p>\n<p>3.1      ACCESS TO TITLE INFORMATION: After the date of this Agreement and<br \/>\n         until the end of the Due Diligence Period, Unocal shall make all of<br \/>\n         its land records that are not privileged or confidential available to<br \/>\n         Buyer at Unocal&#8217;s offices located at 14141 Southwest Freeway, Sugar<br \/>\n         Land, Texas 77478, or such other place as deemed appropriate by<br \/>\n         Unocal, during normal business hours for examination by Buyer. Unocal<br \/>\n         shall not be obligated to perform any title work and no abstracts or<br \/>\n         title opinions will be made current by Unocal. NO WARRANTY OF ANY KIND<br \/>\n         IS MADE BY UNOCAL AS TO THE INFORMATION SO SUPPLIED, AND BUYER AGREES<br \/>\n         THAT ANY CONCLUSIONS DRAWN THEREFROM SHALL BE THE RESULT OF ITS OWN<br \/>\n         INDEPENDENT REVIEW AND JUDGMENT. SUBJECT TO THE OTHER PROVISIONS OF<br \/>\n         THIS AGREEMENT,<\/p>\n<p>                                       14<\/p>\n<p>   23<\/p>\n<p>         BUYER ASSUMES THE RISK OF ANY TITLE DEFECTS AND\/OR CONFLICTING ADVERSE<br \/>\n         RIGHT(S), TITLE(S) AND\/OR INTEREST(S) WHICH A RECORD TITLE CHECK<br \/>\n         AND\/OR PHYSICAL INSPECTION REVEALS OR WOULD HAVE REVEALED.<\/p>\n<p>3.2      TITLE DEFECTS: For purposes of this Agreement, a defect in title<br \/>\n         (&#8220;Title Defect&#8221;) shall mean a defect (other than a Permitted<br \/>\n         Encumbrance) in one or more of the following respects only:<\/p>\n<p>         (i)      Unocal&#8217;s interest in any one or more of the properties<br \/>\n                  comprising the Assets described in Schedules 2.1(i), 2.1(ii)<br \/>\n                  and 2.1(iii) is more or less than the interest for such<br \/>\n                  property(ies) reflected in Schedules 2.1(i), 2.1(ii) and<br \/>\n                  2.1(iii);<\/p>\n<p>         (ii)     Unocal&#8217;s rights and interests in one or more of the<br \/>\n                  properties comprising the Assets described in Schedules<br \/>\n                  2.1(i) and 2.1(ii) are subject to being reduced by virtue of<br \/>\n                  the exercise by a third party of a reversionary, back-in or<br \/>\n                  similar right not reflected in Schedules 2.1(i) and 2.1(ii)<br \/>\n                  nor disclosed to TBI in the Unocal Disclosure Schedule;<\/p>\n<p>         (iii)    Unocal&#8217;s title to one or more of the Leasehold Interests and<br \/>\n                  Oil and Gas Properties is such that Unocal does not have<br \/>\n                  Defensible Title;<\/p>\n<p>         (iv)     Consents to transfer or other similar approvals, other than<br \/>\n                  consents or approvals which are obtained prior to Closing or<br \/>\n                  of a type customarily obtained following the Closing; or<\/p>\n<p>         (v)      Under the Lease Agreement, Unocal is leasing to TBI less than<br \/>\n                  29,000 net acres.<\/p>\n<p>3.3      NOTICE OF TITLE DEFECT: Upon discovery of a Title Defect, the Party<br \/>\n         discovering same shall as soon as reasonably possible thereafter<br \/>\n         notify the other Party of the Title Defect. The notice shall include<br \/>\n         with reasonable specificity the property or properties described in<br \/>\n         Schedule 2.1(i), Schedule 2.1(ii) or Schedule 2.1(iii) which are<br \/>\n         affected, the particular Title Defect claimed, and the notifying<br \/>\n         Party&#8217;s good faith estimate of the Claim Value or Defect Value. Any<br \/>\n         Title Defect which is not asserted by Unocal or Buyer prior to the end<br \/>\n         of the Due Diligence Period shall conclusively be deemed waived by<br \/>\n         both Parties for all purposes.<\/p>\n<p>3.4      CLAIM VALUE: If a claim of Title Defect is made pursuant to Section<br \/>\n         3.2(i) or (ii), the value of the claim (&#8220;Claim Value&#8221;) shall be<br \/>\n         calculated using the Claim Value Formula and Allocated Values set out<br \/>\n         in Exhibit &#8220;A.&#8221;<\/p>\n<p>3.5      DEFECT VALUE: If a claim of Title Defect is made pursuant to Section<br \/>\n         3.2(iii) for a matter not covered by Sections 3.2 (i) or (ii), the<br \/>\n         value of the defect (&#8220;Defect Value&#8221;) for a defect that is a liquidated<br \/>\n         or certain amount shall be such liquidated or certain amount, and as<br \/>\n         to<\/p>\n<p>                                       15<\/p>\n<p>   24<\/p>\n<p>         unliquidated or uncertain amounts it shall be an amount necessary to<br \/>\n         compensate Buyer for the adverse economic effect of such Title Defect<br \/>\n         on the value of the property(ies) affected, taking into consideration<br \/>\n         all relevant factors, including the practical and legal effect of the<br \/>\n         Title Defect. In no instance shall a Defect Value be an amount in<br \/>\n         excess of the Allocated Value of an affected property.<\/p>\n<p>3.6      REMEDIES FOR TITLE DEFECTS:<\/p>\n<p>         (i)   Prior to the Closing Date, Unocal may elect to cure any or all<br \/>\n               Title Defects; provided, however, if Unocal elects to cure a<br \/>\n               Title Defect, but has not been able to do so by the Closing<br \/>\n               Date, the Parties shall proceed with the Closing, with the Claim<br \/>\n               Value or Defect Value, as applicable, being an adjustment to the<br \/>\n               Purchase Price. Unocal shall retain the right to cure any such<br \/>\n               Title Defect for a period of time not to exceed one hundred<br \/>\n               eighty (180) days after the Closing Date. Within thirty (30)<br \/>\n               days of Buyer&#8217;s receipt of curative documents which eliminate<br \/>\n               the Title Defect, Buyer shall tender to Unocal the applicable<br \/>\n               Claim Value or Defect Value withheld at Closing. Unocal&#8217;s option<br \/>\n               to cure Sections 3.2 (i) or (ii) Title Defects shall include the<br \/>\n               option to partially cure any such Title Defect or Title Defects<br \/>\n               so as to reduce the Claim Value of the Title Defect or Title<br \/>\n               Defects.<\/p>\n<p>         (ii)  If the Claim Value or Defect Value of a Title Defect is equal to<br \/>\n               twenty-five percent (25%) or more of the Allocated Value of a<br \/>\n               property described in Schedule 2.1(i) or 2.1(ii), Unocal may in<br \/>\n               its sole discretion elect to retain the affected property and<br \/>\n               delete it from the Assets. In such instance, the Adjusted Cash<br \/>\n               Purchase Price shall be adjusted downward in an amount equal to<br \/>\n               the Allocated Value of the retained property(ies).<\/p>\n<p>         (iii) If a Title Defect is a Section 3.2(i) or (ii) Title Defect<br \/>\n               which increases or decreases Unocal&#8217;s interest in the Assets,<br \/>\n               and Unocal does not elect to cure the Title Defect, the Adjusted<br \/>\n               Cash Purchase Price shall be adjusted up or down by the Claim<br \/>\n               Value of the Title Defect.<\/p>\n<p>         (iv)  If Unocal contests the existence of a Title Defect or Buyer&#8217;s<br \/>\n               good faith estimate of the Claim Value or Defect Value of the<br \/>\n               Title Defect, the Parties shall meet and use their best efforts<br \/>\n               to agree on the validity and\/or value of the Title Defect. If<br \/>\n               the Parties cannot agree on the validity and\/or value of a Title<br \/>\n               Defect, and neither Party elects to waive its claim, the dispute<br \/>\n               shall be submitted to arbitration in accordance with the<br \/>\n               arbitration procedures set forth in Exhibit &#8220;B.&#8221;<\/p>\n<p>                                       16<\/p>\n<p>   25<\/p>\n<p>         (v)   If Unocal agrees, or is required, to pay the Claim Value of the<br \/>\n               Title Defect, it shall pay the Claim Value of the Title Defect<br \/>\n               by an adjustment to the Adjusted Cash Purchase Price by the<br \/>\n               Claim Value of the Title Defect.<\/p>\n<p>3.7      PURCHASE PRICE ADJUSTMENTS THRESHOLD: Notwithstanding any other<br \/>\n         provision herein, the Purchase Price shall not be adjusted due to or<br \/>\n         for a Title Defect, and neither Party shall notify the other Party of<br \/>\n         a Title Defect unless or until the Claim Value or Defect Value of the<br \/>\n         Title Defect exceeds a minimum threshold of $25,000. This $25,000<br \/>\n         Title Defect threshold shall be applied separately to each property<br \/>\n         described in Schedules 2.1(i) or 2.1(ii) that has been assigned a<br \/>\n         separate Allocated Value, but Title Defects shall be calculated on a<br \/>\n         cumulative basis if a separate property is subject to more than one<br \/>\n         Title Defect. If the aggregate total of Title Defects exceeds<br \/>\n         $7,000,000, then Buyer may terminate this Agreement pursuant to<br \/>\n         Section 13.1(ii).<\/p>\n<p>3.8      PREFERENTIAL PURCHASE RIGHTS: (a) Preferential purchase rights shall<br \/>\n         not be considered Title Defects hereunder regardless of whether or not<br \/>\n         they are reflected in the Unocal Disclosure Schedule. As to any and<br \/>\n         all preferential purchase rights known to Unocal prior to the Closing<br \/>\n         affecting Unocal&#8217;s or its Affiliates&#8217; interest in all or part of the<br \/>\n         Assets, in accordance with the provisions of the agreement which<br \/>\n         created the rights, Unocal shall send, as soon as practicable after<br \/>\n         execution of this Agreement, to the owner or owners of such rights a<br \/>\n         notice offering to sell to such owner or owners, those Assets covered<br \/>\n         by such rights for the Allocated Value assigned to the affected<br \/>\n         Assets. If the owner or owners of the rights exercise such rights<br \/>\n         prior to Closing, the affected portion of the Assets shall be deleted<br \/>\n         from the transaction, and the Adjusted Cash Purchase Price shall be<br \/>\n         reduced in an amount equal to the Allocated Value of the deleted<br \/>\n         Assets; provided, however, that Buyer, at its sole expense, shall have<br \/>\n         the right to challenge the asserted preferential rights (and shall<br \/>\n         indemnify, defend, and hold harmless Unocal from claims, damages and<br \/>\n         liabilities arising therefrom or relating thereto). If the specific<br \/>\n         Assets affected do not have a separate Allocated Value, the value<br \/>\n         shall be the Claim Value of the deleted Assets. The Assets which are<br \/>\n         known by Unocal to be subject to preferential purchase rights are<br \/>\n         listed on Schedule 3.8. By listing Assets on Schedule 3.8, Unocal does<br \/>\n         not admit, warrant or represent that any of such Assets are subject to<br \/>\n         preferential purchase rights which have not been waived or that such<br \/>\n         listing is an exhaustive list of all preferential purchase rights<br \/>\n         affecting the Assets. To the extent and in the manner required under<br \/>\n         applicable agreements, Unocal shall either comply with each<br \/>\n         preferential purchase right listed on Schedule 3.8 or obtain a waiver<br \/>\n         thereof. Unocal may seek and obtain waivers of any applicable or<br \/>\n         purported preferential purchase right, in a commercially reasonable<br \/>\n         manner discharging the obligations required of Unocal.<\/p>\n<p>         (b) If the holder of a preferential purchase right fails to consummate<br \/>\n         the purchase of the Assets covered by such right after notice of<br \/>\n         exercise, then Unocal shall so notify Buyer, and<\/p>\n<p>                                       17<\/p>\n<p>   26<\/p>\n<p>         Buyer shall purchase from Unocal, for a price equal to the Allocated<br \/>\n         Values and upon the other terms of this Agreement, the Assets to which<br \/>\n         the preferential purchase right applied. All Assets for which a<br \/>\n         preferential purchase right has not been asserted prior to Closing<br \/>\n         shall be sold to Buyer at Closing pursuant to the provisions of this<br \/>\n         Agreement. If one or more of the holders of such preferential purchase<br \/>\n         rights notifies Unocal subsequent to Closing that it intends to assert<br \/>\n         its preferential purchase right, Unocal shall give notice thereof to<br \/>\n         Buyer, whereupon Buyer may elect to: (i) at its sole expense, satisfy<br \/>\n         such preferential purchase right obligations of Unocal to such holders<br \/>\n         and Buyer shall be entitled to receive and Unocal hereby assigns to<br \/>\n         Buyer, all of Unocal&#8217;s right to all proceeds received from such<br \/>\n         holders in connection with such preferential purchase rights or (ii)<br \/>\n         convey the Assets subject to the preferential purchase right to Unocal<br \/>\n         and Unocal shall remit to Buyer an amount equal to the Allocated Value<br \/>\n         of Assets. If Buyer elects to satisfy the preferential purchase right<br \/>\n         obligations of Unocal pursuant to subsection (i) above, then Buyer<br \/>\n         shall indemnify, defend and hold harmless Unocal from claims, damages<br \/>\n         and liabilities arising therefrom or relating thereto. If Buyer elects<br \/>\n         to convey Assets to Unocal pursuant to subsection (ii) above, then<br \/>\n         Buyer agrees to make such decision and conveyance promptly following<br \/>\n         Buyer&#8217;s becoming aware of the preferential purchase right (and in no<br \/>\n         case more than ten (10) days following notice to Buyer that such<br \/>\n         preferential right is being asserted) so that Unocal will have<br \/>\n         adequate reasonable opportunity and time to challenge or satisfy the<br \/>\n         preferential purchase rights subject to such notification.<\/p>\n<p>3.9      PREFERENTIAL PURCHASE RIGHT DISPUTES: (i) If an owner of a preferential<br \/>\n         purchase right obtains judicial relief which permanently enjoins the<br \/>\n         consummation of the transactions contemplated under this Agreement or<br \/>\n         enjoins the transfer of Assets representing in excess of 20% of the<br \/>\n         Purchase Price, such enjoinder shall be deemed a termination of this<br \/>\n         Agreement by mutual consent of the Parties.<\/p>\n<p>         (ii) If, following the Closing, an owner of a preferential purchase<br \/>\nright (including any Preferential Right which was not listed on Schedule 3.8)<br \/>\nseeks judicial relief, which may include injunctive relief, and Buyer elects<br \/>\nnot to re-convey the affected Assets under Section 3.8(b) above or the time<br \/>\nperiod to re-convey the affected Assets under Section 3.8(b) above has<br \/>\notherwise expired, then Buyer shall indemnify, defend and hold Unocal harmless<br \/>\nfrom any and all claims, causes of action, costs and expenses arising out of or<br \/>\nrelating to such dispute.<\/p>\n<p>                                   SECTION 4<\/p>\n<p>                             ENVIRONMENTAL MATTERS<\/p>\n<p>4.1      NO ADMISSION AGAINST INTEREST: Nothing contained in this Section 4, or<br \/>\n         elsewhere in this Agreement, shall be construed to be an admission<br \/>\n         against interest as to Unocal or TBI. Unocal and TBI have not included<br \/>\n         Environmental Liability related provisions herein due to<\/p>\n<p>                                       18<\/p>\n<p>   27<\/p>\n<p>         any perceived liability and specifically disclaim the existence of any<br \/>\n         such liability to third parties (including governmental entities)<br \/>\n         based on contract, tort, statute or otherwise.<\/p>\n<p>4.2      PHYSICAL CONDITION OF THE ASSETS: Buyer acknowledges that the Assets<br \/>\n         have been used for oil and gas drilling and production operations, gas<br \/>\n         processing operations, related oil field operations and possibly for<br \/>\n         the storage and disposal of Deleterious Substances, and the Assets may<br \/>\n         be contaminated with such materials. Physical changes in or under the<br \/>\n         Leasehold Interests, Oil and Gas Properties or adjacent lands may have<br \/>\n         occurred as a result of such uses. The Assets may contain wells,<br \/>\n         sumps, landfills, pits, ponds, tanks, impoundments, foundations,<br \/>\n         pipelines and other equipment, whether or not of a similar nature, any<br \/>\n         of which may be buried and contain Deleterious Substances, and the<br \/>\n         locations of which may not be known to Unocal or be readily apparent<br \/>\n         by a physical inspection of the property. Further, spills, leaks,<br \/>\n         blowouts and routine operations may have led to contamination of the<br \/>\n         Assets with Deleterious Substances, the locations of which may not be<br \/>\n         known to Unocal or be readily apparent by a physical inspection of the<br \/>\n         property. Buyer understands that Unocal does not have the requisite<br \/>\n         information with which to determine the exact nature or condition of<br \/>\n         the Assets nor the effect any use has had on the physical condition of<br \/>\n         the Assets. In addition Buyer acknowledges that some oil field<br \/>\n         production equipment may contain asbestos and\/or NORM. In this regard,<br \/>\n         Buyer expressly understands that NORM may affix or attach itself to<br \/>\n         the inside of wells, materials and equipment as scale or in other<br \/>\n         forms, and that wells, materials and equipment located on the Assets<br \/>\n         described herein may contain asbestos and NORM, and that NORM in the<br \/>\n         form of scale or in other forms may have become dislodged from the<br \/>\n         inside of wells, materials and equipment and be located on the Assets<br \/>\n         and that asbestos and NORM containing materials may be buried or have<br \/>\n         been otherwise disposed of on the Assets. Buyer also expressly<br \/>\n         understands that special procedures may be required for the removal<br \/>\n         and disposal of asbestos, NORM, and other Deleterious Substances from<br \/>\n         the Assets where they may be found.<\/p>\n<p>4.3      ENDANGERED SPECIES, CRITICAL HABITAT, WETLANDS, GEOLOGIC HAZARDS AND<br \/>\n         FLOODING: &#8220;Endangered Species&#8221; as used herein shall have the same<br \/>\n         meaning as &#8220;endangered species&#8221; is defined pursuant to 16 U.S.C.<br \/>\n         1532(6) or the laws of the state in which the Leasehold Interest is<br \/>\n         located; as &#8220;threatened species&#8221; is defined pursuant to 16 U.S.C.<br \/>\n         1533(30) or the laws of the state in which the Leasehold Interest is<br \/>\n         located; and\/or, as a candidate species for such listing under federal<br \/>\n         or state law. &#8220;Critical Habitat&#8221; as used herein shall have the meaning<br \/>\n         as defined pursuant to 16 U.S.C. 1532(5). &#8220;Wetland&#8221; as used herein<br \/>\n         shall have the meaning as defined in 40 Code of Federal Regulations<br \/>\n         ss.230.3(a), or under the laws of the state in which the Leasehold<br \/>\n         Interest is located. &#8220;Geologic Hazards&#8221; as used herein shall include<br \/>\n         seismic hazard and any earth slides or other earth movement.<br \/>\n         &#8220;Flooding&#8221; as used herein shall include the risks associated with a<br \/>\n         flood plain, flood way or restriction zone and\/or any diminution in<br \/>\n         the value of the Property or restriction of its use by reason of the<br \/>\n         risk of water entering or remaining thereon. WITHOUT IN ANY WAY<br \/>\n         LIMITING ANY<\/p>\n<p>                                       19<\/p>\n<p>   28<\/p>\n<p>         OTHER DISCLAIMERS OF WARRANTY HEREIN AND NOTWITHSTANDING ANY<br \/>\n         DISCLOSURES MADE BY UNOCAL TO BUYER, UNOCAL AND ITS AFFILIATES<br \/>\n         DISCLAIM ANY EXPRESS OR IMPLIED WARRANTY OR REPRESENTATION AS OF THE<br \/>\n         DATE OF THIS AGREEMENT AND\/OR AS OF THE CLOSING OF THE COMPLETENESS OF<br \/>\n         ANY SUCH DISCLOSURE OR THAT THE ASSETS ARE FREE FROM ANY ENDANGERED<br \/>\n         SPECIES OR THAT ALL OR ANY PART OF THE ASSETS ARE NOT A CRITICAL<br \/>\n         HABITAT OR A WETLAND, OR THAT ANY PART OF THE ASSETS DOES NOT INCLUDE<br \/>\n         A GEOLOGIC HAZARD, OR THAT ANY PART OF THE ASSETS ARE NOT SUBJECT TO<br \/>\n         FLOODING. Notwithstanding any<br \/>\n         knowledge that could be imputed to Unocal or its Affiliates, Buyer has<br \/>\n         the obligation to ascertain the presence of and extent of any<br \/>\n         Endangered Species, Critical Habitat, Wetland, Geologic Hazards and<br \/>\n         the risk of Flooding on the Assets.<\/p>\n<p>4.4      ENVIRONMENTAL ASSESSMENTS AND COMPLETION OF ENVIRONMENTAL DUE<br \/>\n         DILIGENCE: From the date of this Agreement, Unocal will provide TBI<br \/>\n         (or its contractor) with reasonable access to certain employees of<br \/>\n         Unocal, certain records of Unocal and the Assets operated by Unocal<br \/>\n         for the Due Diligence Period, during which TBI will, as part of TBI&#8217;s<br \/>\n         due diligence, conduct, at its sole risk and expense, Phase I<br \/>\n         environmental site assessments as provided below and such additional<br \/>\n         environmental site assessments as are commercially reasonable under<br \/>\n         the circumstances and as TBI and Unocal determine is appropriate<br \/>\n         (collectively, the &#8220;Environmental Assessments&#8221;). In the event the<br \/>\n         Parties (acting in good faith) cannot agree to the terms of the<br \/>\n         preceding sentence, this Agreement shall terminate under Section<br \/>\n         13.1(i) of this Agreement. TBI may conduct a Phase I environmental<br \/>\n         site assessment (pursuant to American Society for Testing and<br \/>\n         Materials standards) on each of the fields operated by Unocal set<br \/>\n         forth in Exhibit &#8220;C&#8221; to be conducted by an unrelated third party<br \/>\n         qualified to conduct such Phase I environmental site assessments. TBI<br \/>\n         agrees to immediately provide to Unocal a copy of the Environmental<br \/>\n         Assessments, including all reports, data and conclusions, and, in any<br \/>\n         event, TBI shall provide Unocal a copy of all of the foregoing no<br \/>\n         later than 15 days prior to Closing and if the Closing occurs, and the<br \/>\n         Assets are sold and assigned to Buyer, Unocal shall keep all such<br \/>\n         information strictly confidential. Buyer shall keep any data or<br \/>\n         information acquired by all such examinations and the results of all<br \/>\n         analyses of such data and information strictly confidential and,<br \/>\n         unless required by law, will not disclose same to any person or agency<br \/>\n         without the prior written approval of Unocal except to the extent such<br \/>\n         disclosure is (i) required by applicable law or (ii) to financial<br \/>\n         institutions, environmental consultants, legal counsel or other<br \/>\n         parties to whom disclosure is appropriate and desirable to consummate<br \/>\n         this transaction, but subject to the prior agreement of any such party<br \/>\n         to maintain the confidentiality of the information. Buyer shall<br \/>\n         complete its environmental due diligence within the Due Diligence<br \/>\n         Period.<\/p>\n<p>                                       20<\/p>\n<p>   29<\/p>\n<p>4.5      BUYER&#8217;S ACCESS TO ASSETS; INDEMNIFICATION; INSURANCE:<\/p>\n<p>         (i)   Buyer shall have reasonable access to the Assets to conduct its<br \/>\n               environmental due diligence including but not limited to the<br \/>\n               Environmental Assessments. Buyer shall not perform any act or<br \/>\n               permit the performance of any act that would injure the Assets<br \/>\n               (other than soil sampling which is approved by Unocal in<br \/>\n               writing) or unreasonably disrupt Unocal&#8217;s or its Affiliates&#8217;<br \/>\n               activities thereon or the surface owner&#8217;s or the surface<br \/>\n               tenant&#8217;s activities thereon. If the consent of the surface owner<br \/>\n               or the surface tenant or any other third party is required in<br \/>\n               connection with Buyer&#8217;s access to the Assets, Buyer agrees to<br \/>\n               obtain such consent, with the assistance and cooperation of<br \/>\n               Unocal (at no cost to Unocal), before entering onto the Assets<br \/>\n               affected thereby.<\/p>\n<p>         (ii)  BUYER RELEASES AND AGREES TO INDEMNIFY, DEFEND AND HOLD HARMLESS<br \/>\n               Unocal, its Affiliates, its or their directors, officers,<br \/>\n               employees and agents against all claims for injury to, or death<br \/>\n               of, persons or damage to property arising in any way from the<br \/>\n               exercise of access rights granted to Buyer for environmental due<br \/>\n               diligence or due diligence for any other purpose, or from the<br \/>\n               activities of Buyer or its employees, agents or contractors on<br \/>\n               the Assets. Buyer shall indemnify Unocal, its Affiliates, its or<br \/>\n               their directors, officers, employees and agents against and hold<br \/>\n               each and all of said indemnitees harmless from any and all loss,<br \/>\n               cost, damage, expense or liability, including attorney&#8217;s fees,<br \/>\n               arising out of (i) any and all third party statutory or<br \/>\n               common-law Liens or other encumbrances for labor or materials<br \/>\n               furnished in connection with such tests, samplings, studies or<br \/>\n               surveys as Buyer may conduct with respect to the Assets; and<br \/>\n               (ii) any injury to or death of persons or damage to property<br \/>\n               occurring in, on or about the Assets as the result of Buyer&#8217;s<br \/>\n               due diligence activities REGARDLESS OF THE SOLE, JOINT OR<br \/>\n               CONCURRENT NEGLIGENCE, STRICT LIABILITY, PREMISES LIABILITY,<br \/>\n               BREACH OF CONTRACT, OR OTHER FAULT OR RESPONSIBILITY OF UNOCAL<br \/>\n               OR ANY PARTY OR PERSON (except for any such injuries or damages<br \/>\n               caused solely by the gross negligence or willful misconduct of<br \/>\n               any said indemnitees). The foregoing obligation of indemnity<br \/>\n               shall survive Closing or termination of this Agreement without<br \/>\n               Closing.<\/p>\n<p>         (iii) Buyer shall obtain and maintain or shall cause its outside<br \/>\n               environmental consultants, if such consultants are engaged in<br \/>\n               activities on the Assets, to obtain and maintain insurance<br \/>\n               acceptable to Unocal which is primary as to any insurance or<br \/>\n               self-insurance available to Unocal and which names Unocal and<br \/>\n               its Affiliates as additional insureds with respect to liability<br \/>\n               arising out of Buyer&#8217;s or its agents&#8217; activities on the Assets,<br \/>\n               including a severability of interest clause (cross liability),<br \/>\n               which additional insured endorsement shall not exclude coverage<br \/>\n               based upon the alleged or actual negligence of the additional<br \/>\n               insured. Such insurance shall include:<\/p>\n<p>                                       21<\/p>\n<p>   30<\/p>\n<p>                  (a)      commercial general liability insurance occurrence<br \/>\n                           form or the equivalent with the amendment-aggregate<br \/>\n                           limits of insurance covering contractual liability,<br \/>\n                           subcontractor&#8217;s liability, blanket contractual<br \/>\n                           liability, and, unless waived in writing by Unocal,<br \/>\n                           liability arising from explosion, collapse, or<br \/>\n                           underground property damage, all with a minimum<br \/>\n                           combined single limit of $1,000,000.00 each<br \/>\n                           occurrence, $2,000,000.00 aggregate, for bodily<br \/>\n                           injury, death, property damage, business<br \/>\n                           interruption and personal injury;<\/p>\n<p>                  (b)      comprehensive automobile liability insurance or<br \/>\n                           business auto policy on an occurrence basis covering<br \/>\n                           all owned, hired or otherwise operated non-owned<br \/>\n                           vehicles with a minimum combined single limit of<br \/>\n                           $1,000,000.00 each occurrence for bodily injury,<br \/>\n                           death and property damage;<\/p>\n<p>                  (c)      workers&#8217; compensation insurance as required by law;<br \/>\n                           and<\/p>\n<p>                  (d)      employers&#8217; liability insurance with a minimum limit<br \/>\n                           of $1,000,000.00 each occurrence.<\/p>\n<p>Such insurance shall be written by a carrier with a Best&#8217;s rating of A IX or<br \/>\nabove. Before the entry by Buyer upon the Assets, Buyer shall provide Unocal<br \/>\nwith policies or certificates of the aforesaid insurance acceptable in form and<br \/>\nsubstance to Unocal which shall provide that coverage shall not be canceled or<br \/>\nmaterially changed prior to thirty (30) days&#8217; written notice to Unocal.<br \/>\nSubrogation against Unocal and its Affiliates shall be waived with respect to<br \/>\nall of the insurance policies set forth above (including without limitation,<br \/>\npolicies of any consultant). The insurance required by this provision in no way<br \/>\nlimits Buyer&#8217;s obligations under any other Section of this Agreement. Further,<br \/>\nthe insurance to be carried shall in no way be limited by any limitation<br \/>\nexpressed elsewhere in this Agreement, or any limitation placed on the<br \/>\nindemnity herein given or as a matter of law.<\/p>\n<p>4.6      ASSUMPTION OF ENVIRONMENTAL LIABILITIES: Buyer shall assume and<br \/>\n         discharge any and all Environmental Liabilities relating to or arising<br \/>\n         from the Assets, whether relating to or arising from ownership or<br \/>\n         operations before or after the Effective Date, except as follows:<\/p>\n<p>         (i)      Buyer assumes no Environmental Liabilities unless and until<br \/>\n                  Closing occurs; and<\/p>\n<p>         (ii)     Based on the Qualified Claim Cost Sharing Allocation, Unocal<br \/>\n                  shall be responsible only for a portion of the Remediation<br \/>\n                  Costs for Qualified Claims.<\/p>\n<p>                                       22<\/p>\n<p>   31<\/p>\n<p>4.7      QUALIFIED CLAIM COST SHARING:<\/p>\n<p>         (a)      Any Remediation Costs incurred by Buyer or Unocal or its<br \/>\n                  Affiliates in satisfying a Qualified Claim shall be allocated<br \/>\n                  and satisfied by the Parties as follows (&#8220;Qualified Claim<br \/>\n                  Cost Sharing Allocation&#8221;):<\/p>\n<p>                  (i)      each separate and distinct Qualified Claim for which<br \/>\n                           the Remediation Cost is $10,000 or less (&#8220;Minimal<br \/>\n                           Environmental Liabilities&#8221;) shall be allocated to<br \/>\n                           and satisfied by Buyer;<\/p>\n<p>                  (ii)     Subject to Section 4.7(a)(i) above, cumulative<br \/>\n                           Remediation Costs for all Qualified Claims, except<br \/>\n                           Minimal Environmental Liabilities, up to an<br \/>\n                           aggregate amount equal to $50,000 are allocated to<br \/>\n                           and shall be satisfied by Unocal and Buyer as<br \/>\n                           follows: Buyer shall satisfy the first $10,000 of<br \/>\n                           each separate and distinct Qualified Claim for which<br \/>\n                           the Remediation Cost is greater than $10,000 and<br \/>\n                           Unocal satisfying the balance of the claim up to an<br \/>\n                           aggregate amount for all Qualified Claims of<br \/>\n                           $50,000;<\/p>\n<p>                  (iii)    Subject to Sections 4.7(a)(i) and (ii) above,<br \/>\n                           cumulative Remediation Costs for all Qualified<br \/>\n                           Claims, except Minimal Environmental Liabilities,<br \/>\n                           which exceed an aggregate amount equal to $50,000<br \/>\n                           (with such aggregate $50,000 for all Qualified Claims<br \/>\n                           being allocated and satisfied in the manner described<br \/>\n                           in Section 4.7(a)(ii) above) and up to an aggregate<br \/>\n                           amount equal to 26.2% of the Purchase Price (which,<br \/>\n                           for purposes of this Section 4.7(a)(iii) is deemed<br \/>\n                           to be $20 million based upon a Purchase Price of<br \/>\n                           $76.4 million) are allocated to and shall<br \/>\n                           be satisfied one-half by Buyer and one-half by<br \/>\n                           Unocal.<\/p>\n<p>                  (iv)     Subject to Sections 4.7(a)(i) &#8211; (iii) above,<br \/>\n                           cumulative Remediation Costs for all Qualified<br \/>\n                           Claims, except Minimal Environmental Liabilities,<br \/>\n                           which exceed an aggregate amount equal to 26.2% of<br \/>\n                           the Purchase Price (which, for purposes of this<br \/>\n                           Section 4.7(a)(iv) is deemed to be $20 million based<br \/>\n                           upon a Purchase Price of $76.4 million) are<br \/>\n                           allocated to and shall be satisfied<br \/>\n                           solely by Buyer.<\/p>\n<p>         (b)      An example of the application of the Qualified Claim Cost<br \/>\n                  Sharing Allocation is set forth on Schedule 4.7 hereto.<\/p>\n<p>         (c)      NOTWITHSTANDING ANYTHING STATED HEREIN TO THE CONTRARY, THE<br \/>\n                  LIMITATIONS ON UNOCAL&#8217;S LIABILITY, AND THE ASSUMPTION OF ALL<br \/>\n                  LIABILITIES ABOVE SUCH LIMITATIONS BY BUYER, UNDER THIS<br \/>\n                  SECTION 4 AND ELSEWHERE IN THIS AGREEMENT SHALL APPLY<br \/>\n                  REGARDLESS OF WHETHER SUCH LIABILITIES ARE KNOWN OR UNKNOWN,<br \/>\n                  RELATE TO ACTIONS,<\/p>\n<p>                                       23<\/p>\n<p>   32<\/p>\n<p>                  EVENTS OR CONDITIONS EXISTING OR OCCURRING PRIOR TO THE<br \/>\n                  EFFECTIVE DATE, WHETHER ATTRIBUTABLE (IN WHOLE OR IN PART) TO<br \/>\n                  THE ACTIONS, SOLE, JOINT OR CONCURRENT NEGLIGENCE, STRICT<br \/>\n                  LIABILITY, BREACH OF CONTRACT, PRODUCTS LIABILITY,<br \/>\n                  ENVIRONMENTAL LIABILITY, OR OTHER FAULT, LIABILITY OR<br \/>\n                  RESPONSIBILITY OF UNOCAL OR ANY OTHER PERSON OR PARTY, AND<br \/>\n                  REGARDLESS OF WHETHER ASSERTED UNDER ANY THEORY OF LIABILITY.<\/p>\n<p>4.8      LIMITATION: No obligations allocated to or assumed by Unocal under<br \/>\n         this Agreement shall include any obligation to remediate any<br \/>\n         Environmental Liability in or upon land or any water course or body of<br \/>\n         water including ground water beyond the lawful requirements of the<br \/>\n         government agency or agencies with jurisdiction over the Assets or a<br \/>\n         court of competent jurisdiction, nor shall such obligations include<br \/>\n         any action, cost or expense other than actions, costs, or expenses<br \/>\n         required by law. Between the Parties, Unocal shall have the right but<br \/>\n         not the obligation to direct and control any work required to remedy<br \/>\n         Environmental Liabilities if it may be responsible for more than fifty<br \/>\n         percent (50%) of the costs and expenses of such work attributable to<br \/>\n         the interest of the Parties; provided, however, if the Parties have<br \/>\n         control, regardless of which Party directs and controls any required<br \/>\n         work to remedy Environmental Liabilities, all such actions shall be<br \/>\n         the most cost efficient possible to comply with applicable<br \/>\n         Environmental Laws and which are consistent with continued use of the<br \/>\n         Assets for the same purposes they were being used on the Effective<br \/>\n         Date, and shall be based on mutually acceptable actions after<br \/>\n         consultation with the other Party.<\/p>\n<p>4.9      TERMINATION DUE TO MATERIAL ENVIRONMENTAL DEFICIENCIES: If it is<br \/>\n         determined during the Due Diligence Period that a Material<br \/>\n         Environmental Deficiency exists, either Buyer or Unocal may elect to<br \/>\n         terminate this Agreement, unless Buyer and Unocal mutually agree in<br \/>\n         writing to delete all or part of the affected Assets from this<br \/>\n         Agreement, and adjust the Adjusted Cash Purchase Price accordingly,<br \/>\n         such that the total Environmental Liabilities remaining do not<br \/>\n         constitute a Material Environmental Deficiency.<\/p>\n<p>4.10     DETERMINATION OF VALUE:<\/p>\n<p>         (i)      Upon delivery of notice by Buyer to Unocal of a Material<br \/>\n                  Environmental Deficiency, Buyer and Unocal shall meet and use<br \/>\n                  their best efforts to agree on whether such a Material<br \/>\n                  Environmental Deficiency exists. The value of Environmental<br \/>\n                  Liabilities shall be based on the estimated Remediation Cost.<\/p>\n<p>         (ii)     If, during the Due Diligence Period, Buyer determines there<br \/>\n                  is a Material Environmental Deficiency and desires to<br \/>\n                  terminate this Agreement, it shall immediately so notify<br \/>\n                  Unocal. Unocal shall respond on the earlier of the Closing<\/p>\n<p>                                       24<\/p>\n<p>   33<\/p>\n<p>                  Date or seven (7) days from the date of notice whether it<br \/>\n                  concurs in Buyer&#8217;s determination that the estimated<br \/>\n                  Remediation Cost of the applicable Environmental Liabilities<br \/>\n                  is sufficient to constitute a Material Environmental<br \/>\n                  Deficiency. In the event Unocal concurs in Buyer&#8217;s<br \/>\n                  determination, the termination of this Agreement shall be<br \/>\n                  treated as a termination by mutual consent of the Parties.<\/p>\n<p>         (iii)    If Unocal timely notifies Buyer that it does not concur with<br \/>\n                  the Buyer&#8217;s determination of the estimated Remediation Costs,<br \/>\n                  Buyer may still elect to terminate this Agreement and request<br \/>\n                  a determination of the value of the Environmental Liabilities<br \/>\n                  by the following procedure: the Parties will submit the issue<br \/>\n                  of the existence of a Material Environmental Deficiency to<br \/>\n                  arbitration in accordance with the arbitration procedures set<br \/>\n                  forth in Exhibit &#8220;B.&#8221; If the arbitrators determine that a<br \/>\n                  Material Environmental Deficiency does not exist, Buyer will<br \/>\n                  pay the arbitration costs. If the arbitrators find that a<br \/>\n                  Material Environmental Deficiency does exist, Unocal will pay<br \/>\n                  the arbitration costs. If Buyer does not elect to terminate<br \/>\n                  this Agreement prior to the commencement of arbitration in<br \/>\n                  connection with this Section, then Buyer shall be deemed to<br \/>\n                  have waived its right to terminate this Agreement under this<br \/>\n                  Section unless and until the arbitrators determined that a<br \/>\n                  Material Environmental Deficiency exists, and if such<br \/>\n                  arbitrators determine that no Material Environmental<br \/>\n                  Deficiency exists, then Buyer shall pay all arbitration costs<br \/>\n                  and proceed to Closing, subject to the other terms and<br \/>\n                  conditions of this Agreement.<\/p>\n<p>         (iv)     Any and all disagreements between Buyer and Unocal regarding<br \/>\n                  the value of Environmental Liabilities shall be submitted to<br \/>\n                  arbitration in accordance with the arbitration procedures set<br \/>\n                  forth in Exhibit &#8220;B.&#8221;<\/p>\n<p>                                   SECTION 5<\/p>\n<p>                          OPERATIONS AND CASUALTY LOSS<\/p>\n<p>5.1      OPERATIONS: Between the Effective Date and Closing, as to the portion<br \/>\n         of the Assets to be conveyed which Unocal now operates, it shall<br \/>\n         operate the same in a good and workmanlike manner. At Closing, such<br \/>\n         operations shall be turned over to and become the responsibility of<br \/>\n         Buyer, unless an applicable unit, pooling, communitization or<br \/>\n         operating agreement requires otherwise, in which case (unless Buyer<br \/>\n         and Unocal otherwise agree) Unocal shall continue the physical<br \/>\n         operation of such portion of the Assets, pursuant to and under the<br \/>\n         terms of such applicable agreement, until such time after Closing as<br \/>\n         such applicable agreement may require. However, Unocal shall have no<br \/>\n         liability as operator to Buyer, for any operations by Unocal, for loss<br \/>\n         or damages sustained, or liabilities incurred, REGARDLESS OF THE SOLE,<br \/>\n         JOINT OR CONCURRENT NEGLIGENCE, STRICT LIABILITY, BREACH OF CONTRACT<br \/>\n         OR OTHER FAULT OR RESPONSIBILITY OF<\/p>\n<p>                                       25<\/p>\n<p>   34<\/p>\n<p>         UNOCAL OR ANY OTHER PERSON OR PARTY, except as may result directly from<br \/>\n         Unocal&#8217;s gross negligence or willful misconduct. Such operations from<br \/>\n         and after the Closing shall be conducted by Unocal for and on behalf<br \/>\n         of Buyer, and Unocal shall make appropriate charges to Buyer pursuant<br \/>\n         to any applicable operating agreement pursuant to Sections 2.6(i),<br \/>\n         (iii) and (iv). In the absence of any applicable operating agreement,<br \/>\n         for any such services performed by Unocal as operator of the Assets<br \/>\n         (or portions thereof) from and after the Effective Date, Buyer shall<br \/>\n         pay to Unocal the applicable Asset&#8217;s working interest percentage of an<br \/>\n         overhead operating charge of $660 per month per active well operated<br \/>\n         by Unocal; plus Buyer shall reimburse all reasonable and necessary<br \/>\n         expenses incurred by Unocal in such operation, protection or<br \/>\n         maintenance of the Assets as are not normally included within the<br \/>\n         operating charge in standard form accounting procedures but are paid<br \/>\n         as direct charges thereunder. Any such charges and expenses shall be<br \/>\n         recovered by Unocal as part of the Closing or Final Accounting<br \/>\n         adjustments as appropriate.<\/p>\n<p>5.2      CASUALTY LOSS: Upon the Closing, the risk of Casualty Loss relating to<br \/>\n         the Assets shall pass from Unocal to Buyer, effective as of the<br \/>\n         Effective Date.<\/p>\n<p>5.3      SUCCESSOR OPERATOR: Buyer acknowledges and agrees that Unocal cannot<br \/>\n         and does not covenant or warrant that Buyer shall become successor<br \/>\n         operator of all or any portion of the Assets, since the Assets or<br \/>\n         portions thereof may be subject to unit, pooling, communitization,<br \/>\n         operating or other agreements which control the appointment of a<br \/>\n         successor operator. Unocal agrees, however, that as to the Assets it<br \/>\n         operates, where it will facilitate the appointment of a successor<br \/>\n         operator, Unocal will use its reasonable efforts to recommend TBI as<br \/>\n         successor operator and will resign as operator when a successor<br \/>\n         operator assumes operations.<\/p>\n<p>5.4      RESTRICTIONS ON OPERATIONS: Between the Execution Date and Closing,<br \/>\n         except as necessary in Unocal&#8217;s opinion in emergency situations,<br \/>\n         Unocal shall not, without Buyer&#8217;s consent, voluntarily incur any<br \/>\n         liability or enter into any commitment with respect to the Assets<br \/>\n         which will cost in excess of $50,000 net to Unocal with respect to an<br \/>\n         individual project; cancel any contract associated with the Assets<br \/>\n         except in the ordinary course of business; or enter into any hedging,<br \/>\n         forward sales or similar agreements with respect to production from<br \/>\n         the Assets.<\/p>\n<p>5.5      PERMIT TRANSFERS: Buyer acknowledges and agrees to the following<br \/>\n         regarding the transfer of Permits:<\/p>\n<p>         (a)      Unocal and Buyer agree that, as of the Closing Date, Buyer<br \/>\n                  shall be responsible for compliance with the Permits, whether<br \/>\n                  or not Unocal or Buyer is the permit holder or operator under<br \/>\n                  the Permits. After the Closing Date, Buyer agrees to maintain<br \/>\n                  all Permits in full force and effect in compliance with the<br \/>\n                  laws applicable to such Permits.<\/p>\n<p>                                       26<\/p>\n<p>   35<\/p>\n<p>         (b)      Buyer acknowledges that certain of the Permits, by their<br \/>\n                  terms, cannot be transferred. Buyer agrees to promptly apply<br \/>\n                  for and diligently pursue new Permits in all cases where a<br \/>\n                  Permit cannot be transferred to Buyer and Buyer and Unocal<br \/>\n                  agree to diligently pursue the transfer of Permits which are<br \/>\n                  transferable.<\/p>\n<p>         (c)      Certain of the Pipeline Assets owned by Unocal are currently<br \/>\n                  FERC common carriage and will require FERC approval and<br \/>\n                  possibly other regulatory approval prior to transfer of<br \/>\n                  such Pipeline Assets to Buyer. Unocal and Buyer shall<br \/>\n                  commence promptly and thereafter diligently pursue the<br \/>\n                  appropriate process necessary to gain FERC approval and<br \/>\n                  other regulatory approvals to transfer such Pipeline Assets<br \/>\n                  to Buyer. Since the FERC and regulatory approval process<br \/>\n                  may extend beyond Closing, Unocal shall (to the extent<br \/>\n                  permissable under applicable licenses, permits and<br \/>\n                  regulations and in accordance with a management agreement<br \/>\n                  to be mutually agreed upon by the parties) retain<br \/>\n                  operations and ownership of such Pipeline Assets until FERC<br \/>\n                  approval or other regulatory approvals required by Unocal<br \/>\n                  to transfer such Pipeline Assets to Buyer are obtained.<\/p>\n<p>         (d)      After Closing and to the extent agreed in writing by Unocal,<br \/>\n                  Unocal will continue as permit holder on behalf of Buyer<br \/>\n                  under those Permits that have yet to be assigned or issued to<br \/>\n                  Buyer until such time as all Permits necessary to the<br \/>\n                  operation of the Assets and Pipeline Assets have been<br \/>\n                  assigned or issued to Buyer. After Closing and for as long as<br \/>\n                  Unocal or Unocal&#8217;s name remains on a Permit, Buyer shall<br \/>\n                  indemnify and hold Unocal and its Affiliates harmless from<br \/>\n                  and against any and all claims in respect of Environmental<br \/>\n                  Liabilities arising out of, resulting from or relating to the<br \/>\n                  Permits.<\/p>\n<p>         (e)      For as long as Unocal or Unocal&#8217;s name remains on any Permit,<br \/>\n                  Buyer agrees not to sell any Assets related thereto or<br \/>\n                  transfer such related Permit without Unocal&#8217;s prior written<br \/>\n                  consent, which may be given or withheld in its sole<br \/>\n                  discretion.<\/p>\n<p>                                   SECTION 6<\/p>\n<p>                    REPRESENTATIONS AND WARRANTIES OF UNOCAL<\/p>\n<p>         Unocal hereby represents and warrants to Buyer as follows:<\/p>\n<p>6.1      ORGANIZATION: Unocal is a corporation duly organized, validly existing<br \/>\n         and in good standing under the laws of the state of California, and is<br \/>\n         qualified to do business and is in good standing as a foreign<br \/>\n         corporation in every other jurisdiction where the failure to so<br \/>\n         qualify would have a Party Adverse Effect on Unocal.<\/p>\n<p>                                       27<\/p>\n<p>   36<\/p>\n<p>6.2      AUTHORITY TO DO BUSINESS: Unocal has all requisite power and authority<br \/>\n         to own, lease or operate the Assets and to carry on the business as<br \/>\n         now conducted.<\/p>\n<p>6.3      AUTHORITY; ENFORCEABILITY:<\/p>\n<p>         (i)      Unocal has all requisite corporate power and authority to<br \/>\n                  enter into and perform its obligations under this Agreement<br \/>\n                  and to carry out the transactions contemplated hereby.<\/p>\n<p>         (ii)     All corporate acts and other proceedings required to be taken<br \/>\n                  by Unocal to authorize the execution, delivery and<br \/>\n                  performance by Unocal of this Agreement have been duly and<br \/>\n                  properly taken.<\/p>\n<p>         (iii)    This Agreement has been duly executed and delivered by Unocal<br \/>\n                  and constitutes the legal, valid and binding obligation of<br \/>\n                  Unocal, enforceable against Unocal in accordance with its<br \/>\n                  terms.<\/p>\n<p>         (iv)     The execution, delivery and performance by Unocal of this<br \/>\n                  Agreement does not and will not conflict with, or result in<br \/>\n                  any violation of or default under any provision of the<br \/>\n                  Articles of Incorporation or By-laws of Unocal or any law,<br \/>\n                  ordinance, rule, regulation, judgment, order, decree,<br \/>\n                  agreement, instrument or license applicable to Unocal or to<br \/>\n                  the Assets.<\/p>\n<p>6.4      LITIGATION, SUITS OR CLAIMS: Except as disclosed in the Unocal<br \/>\n         Disclosure Schedule, (a) there are no actions, suits or proceedings<br \/>\n         pending or, to Unocal&#8217;s Knowledge, threatened in writing against<br \/>\n         Unocal which if decided unfavorably to Unocal could have a material<br \/>\n         adverse effect on any of the Assets (other than actions, suits,<br \/>\n         proceedings, asserted or threatened, relating to Title Defects or<br \/>\n         Environmental Liabilities or disclosed in any of the exhibits or<br \/>\n         schedules to this Agreement) and (b) to Unocal&#8217;s Knowledge, no written<br \/>\n         notice from any governmental authority or person has been received by<br \/>\n         Unocal claiming any violation or repudiation of the Oil and Gas<br \/>\n         Properties or any violation of any law, rule, regulation, ordinance,<br \/>\n         order, decision or decree of any governmental authority (including,<br \/>\n         without limitation, any such law, rule, regulation, ordinance, order,<br \/>\n         decision or decree concerning the conservation of natural resources)<br \/>\n         relating to the Oil and Gas Properties.<\/p>\n<p>6.5      DISCLAIMER OF WARRANTIES: EXCEPT AS HEREIN PROVIDED, SUBJECT TO<br \/>\n         SECTIONS 6.8 AND 6.9 HEREOF, THE ASSETS ARE SOLD &#8220;AS IS,&#8221; &#8220;WHERE IS&#8221;<br \/>\n         AND &#8220;WITH ALL FAULTS AS TO ALL MATTERS,&#8221; AND UNOCAL AND ITS AFFILIATES<br \/>\n         EXPRESSLY DISCLAIM AND NEGATE ANY REPRESENTATION OR WARRANTY, EXPRESS,<br \/>\n         IMPLIED, AT COMMON LAW, BY STATUTE, OR OTHERWISE RELATING TO (a) THE<br \/>\n         CONDITIONS OF THE ASSETS (INCLUDING,<\/p>\n<p>                                       28<\/p>\n<p>   37<\/p>\n<p>         WITHOUT LIMITATION, ANY IMPLIED OR EXPRESS WARRANTY OF<br \/>\n         MERCHANTABILITY, OF FITNESS FOR A PARTICULAR PURPOSE, OR OF CONFORMITY<br \/>\n         TO MODELS OR SAMPLES OF MATERIALS), (b) ANY INFRINGEMENT BY UNOCAL OF<br \/>\n         ANY PATENT OR PROPRIETARY RIGHT OF ANY THIRD PARTY, (c) ANY<br \/>\n         INFORMATION, DATA OR OTHER MATERIALS (WRITTEN OR ORAL) FURNISHED TO<br \/>\n         BUYER BY OR ON BEHALF OF UNOCAL (INCLUDING WITHOUT LIMITATION, IN<br \/>\n         RESPECT OF GEOLOGICAL AND ENGINEERING DATA, THE EXISTENCE OR EXTENT OF<br \/>\n         OIL, GAS OR OTHER MINERAL RESERVES, THE RECOVERABILITY OF OR THE COST<br \/>\n         OF RECOVERING ANY SUCH RESERVES, THE VALUE OF SUCH RESERVES, ANY<br \/>\n         PRODUCT PRICING ASSUMPTIONS, AND THE ABILITY TO SELL OIL OR GAS<br \/>\n         PRODUCTION AFTER CLOSING), (d) THE ENVIRONMENTAL CONDITION AND OTHER<br \/>\n         CONDITION OF THE ASSETS AND ANY POTENTIAL LIABILITY ARISING FROM OR<br \/>\n         RELATED TO THE ASSETS, AND (e) THE FAILURE OF ANY COMPUTER,<br \/>\n         ELECTRONICS, SOFTWARE, OR COMPONENTS TO BE FREE OF ANY BUGS OR ERRORS,<br \/>\n         INCLUDING, BUT NOT LIMITED TO, ANY DEFICIENCIES RELATING TO THE<br \/>\n         INABILITY TO PROPERLY FUNCTION BEYOND DECEMBER 31, 1999.<\/p>\n<p>6.6      GAS ENTITLEMENTS AND IMBALANCES: To Unocal&#8217;s Knowledge, except as<br \/>\n         described in Schedule 6.6 or in any other part of this Agreement,<br \/>\n         Unocal is not obligated by virtue of any prepayment made under any<br \/>\n         production sales contract or any other contract containing a<br \/>\n         take-or-pay clause, or under any similar arrangement, to deliver oil,<br \/>\n         gas or other minerals produced from or allocated to any of the Assets<br \/>\n         at any time after the Effective Date without receiving payment<br \/>\n         therefor.<\/p>\n<p>6.7      NO BREACH: To Unocal&#8217;s Knowledge, except as otherwise disclosed in<br \/>\n         this Agreement, Unocal is not party to, or subject to, or bound by any<br \/>\n         provision of any judgment, order, writ, injunction or decree of any<br \/>\n         court, or governmental body, or any statute, rule or regulation<br \/>\n         applicable to Unocal which prohibits or would be violated by, or which<br \/>\n         allows for the termination or modification of this Agreement due to<br \/>\n         Unocal entering into, executing, delivering or consummating same.<\/p>\n<p>6.8      ENVIRONMENTAL CONDITION OF ASSETS: To Unocal&#8217;s Knowledge, all material<br \/>\n         environmental problems affecting the Assets are referred to in<br \/>\n         documents which have been, or prior to Closing, will be provided or<br \/>\n         made available to Buyer, or are otherwise referred to in the Unocal<br \/>\n         Disclosure Schedule or described in Schedule 6.8 (&#8220;Environmental<br \/>\n         Disclosure Schedule&#8221;). Unocal and TBI acknowledge that (i) there are<br \/>\n         certain environmental conditions referenced on Schedule 6.8 which have<br \/>\n         not yet become specific and identifiable third party claims and that<br \/>\n         the inclusion of such conditions shall not preclude claims which arise<br \/>\n         after the Closing Date from being categorized as and treated hereunder<br \/>\n         as Qualified Claims even<\/p>\n<p>                                       29<\/p>\n<p>   38<\/p>\n<p>         though such claims relate to such generally described environmental<br \/>\n         conditions (to the extent that such claims otherwise meet the criteria<br \/>\n         of Qualified Claims, as defined herein), and (ii) that the<br \/>\n         environmental matters described on Schedule 6.8 which constitute<br \/>\n         specific and identifiable third party claims shall be the<br \/>\n         responsibility of TBI and shall not be eligible to become Qualified<br \/>\n         Claims after the Closing.<\/p>\n<p>6.9      COMPLIANCE WITH LAWS AND AGREEMENTS: To Unocal&#8217;s Knowledge, Unocal is<br \/>\n         in compliance with all permits, contracts and agreements relating to<br \/>\n         the Assets, and in compliance with all laws, rules and regulations of<br \/>\n         federal, state or local entities which have jurisdiction over Unocal<br \/>\n         or the Assets such that any failure of compliance will not have an<br \/>\n         adverse effect on the value of the Assets.<\/p>\n<p>6.10     TAXES: To Unocal&#8217;s Knowledge, all ad valorem, property, production,<br \/>\n         severance and similar taxes and assessments based on or measured by<br \/>\n         the ownership of property or the production or removal of Hydrocarbons<br \/>\n         or the receipt of proceeds therefrom and relating to the Assets, to<br \/>\n         the extent such taxes and assessments have become due and payable,<br \/>\n         have been timely paid and all applicable tax returns required to be<br \/>\n         filed have been filed and there are no claims by any applicable taxing<br \/>\n         authority pending against Unocal applicable to the Assets.<\/p>\n<p>6.11     NO DISTRIBUTION: Unocal is acquiring the Shares for its own account<br \/>\n         for investment purposes and not with a view to or for sale in<br \/>\n         connection with any distributions thereof within the meaning of the<br \/>\n         Securities Act of 1933, as amended (the &#8220;Securities Act&#8221;), and the<br \/>\n         rules and regulations thereunder and any applicable state securities<br \/>\n         laws. Unocal understands that the Common Stock will not have been<br \/>\n         registered pursuant to the Securities Act or any applicable state<br \/>\n         securities or Blue Sky law, that such securities will be characterized<br \/>\n         as &#8220;restricted securities&#8221; under the federal securities laws and that<br \/>\n         under such laws and applicable regulations such securities cannot be<br \/>\n         sold or otherwise disposed of without registration under the<br \/>\n         Securities Act or an exemption therefrom. In this connection, Unocal<br \/>\n         represents that it is familiar with Rule 144, as currently in effect,<br \/>\n         and understands the resale limitations imposed thereby and by the<br \/>\n         Securities Act.<\/p>\n<p>6.12     CURRENT COMMITMENTS: To Unocal&#8217;s Knowledge, Schedule 6.12 contains a<br \/>\n         true and complete list as of the date of this Agreement of all<br \/>\n         authorities for expenditures (&#8220;AFEs&#8221;) to drill or rework Wells, or for<br \/>\n         other capital expenditures, involving amounts in excess of $250,000<br \/>\n         pursuant to any of the contracts being assumed by Buyer for which all<br \/>\n         of the activities anticipated in such AFEs or commitments have not<br \/>\n         been completed by the date of this Agreement.<\/p>\n<p>6.13     BROKERS: Unocal has not incurred any obligation or liability,<br \/>\n         contingent or otherwise, for any fee payable to a broker or finder<br \/>\n         with respect to the matters provided for in this Agreement which could<br \/>\n         be attributable to or charged to Buyer.<\/p>\n<p>                                       30<\/p>\n<p>   39<\/p>\n<p>6.14     OWNERSHIP OF COMMON STOCK: As of the date of this Agreement, neither<br \/>\n         Unocal nor its Affiliates own shares of Common Stock or other<br \/>\n         securities convertible into shares of Common Stock and are not a party<br \/>\n         to any agreements to acquire any such securities other than this<br \/>\n         Agreement.<\/p>\n<p>6.15     ROYALTIES: To Unocal&#8217;s knowledge, except as set forth in Exhibit &#8220;D,&#8221;<br \/>\n         all royalties and similar assessments based on or measured by the<br \/>\n         ownership of property or the production or removal of Hydrocarbons or<br \/>\n         the receipt of proceeds therefrom and relating to the Assets, to the<br \/>\n         extent such royalties have become due and payable, have been timely<br \/>\n         paid; provided, however, that notwithstanding anything to the<br \/>\n         contrary, Unocal does not make, and expressly disclaims, any<br \/>\n         representations or warranties regarding the manner or method of<br \/>\n         calculation of any such royalties.<\/p>\n<p>                                   SECTION 7<\/p>\n<p>                    REPRESENTATIONS AND WARRANTIES OF BUYER<\/p>\n<p>         TBI hereby represents and warrants to Unocal as follows:<\/p>\n<p>7.1      ORGANIZATION:<\/p>\n<p>         (i)      Buyer is a corporation duly organized, validly existing and<br \/>\n                  in good standing under the laws of the state of Delaware, and<br \/>\n                  is qualified to do business and is in good standing as a<br \/>\n                  foreign corporation in every other jurisdiction where the<br \/>\n                  failure to so qualify would have a Party Adverse Effect on<br \/>\n                  Buyer.<\/p>\n<p>         (ii)     Buyer has all requisite power and authority to own, lease or<br \/>\n                  operate its properties, assets and to carry on its business<br \/>\n                  as now conducted. Buyer is authorized to do business in the<br \/>\n                  states of Colorado, Wyoming, North Dakota and Utah.<\/p>\n<p>         (iii)    Prior to the date of this Agreement, Buyer has delivered to<br \/>\n                  Unocal true, correct and complete copies of Buyer&#8217;s<br \/>\n                  Certificate of Incorporation and Bylaws, as currently in<br \/>\n                  effect.<\/p>\n<p>         (iv)     The respective headquarters and principal offices of Buyer<br \/>\n                  are located in the State of Texas.<\/p>\n<p>7.2      AUTHORITY; ENFORCEABILITY:<\/p>\n<p>         (i)      Buyer has all requisite corporate power and authority to<br \/>\n                  enter into and perform its obligations under this Agreement<br \/>\n                  and to carry out the transactions contemplated hereby.<\/p>\n<p>                                       31<\/p>\n<p>   40<\/p>\n<p>         (ii)     All corporate acts and other proceedings required to be taken<br \/>\n                  by Buyer to authorize the execution, delivery and performance<br \/>\n                  by Buyer of this Agreement have been duly and properly taken.<\/p>\n<p>         (iii)    This Agreement has been duly executed and delivered by Buyer<br \/>\n                  and constitutes the legal, valid and binding obligation of<br \/>\n                  Buyer, enforceable against Buyer in accordance with its<br \/>\n                  terms.<\/p>\n<p>         (iv)     The execution, delivery and performance of this Agreement by<br \/>\n                  Buyer do not and will not conflict with, or result in any<br \/>\n                  violation of or default under any provision of the<br \/>\n                  Certificate of Incorporation or Bylaws of Buyer, or any law,<br \/>\n                  ordinance, rule, regulation, judgment, order, decree,<br \/>\n                  agreement, instrument or license applicable to Buyer or to<br \/>\n                  its properties or assets.<\/p>\n<p>7.3      CONSENTS: Other than compliance with the Hart-Scott-Rodino Act,<br \/>\n         approval of the Buyer&#8217;s board of directors, approval by Buyer&#8217;s<br \/>\n         principal lenders and satisfaction of the covenants and conditions of<br \/>\n         this Agreement, no consent, approval, authorization, notice, filing,<br \/>\n         registration or qualification is required to be obtained or effected<br \/>\n         by Buyer for the execution, delivery or performance by Buyer of this<br \/>\n         Agreement.<\/p>\n<p>7.4      LITIGATION, SUITS OR CLAIMS: To Buyer&#8217;s Knowledge and except as<br \/>\n         reflected in Buyer&#8217;s SEC Filings, there are no actions, suits or<br \/>\n         proceedings pending or threatened in writing against Buyer which if<br \/>\n         decided unfavorably to Buyer could have a Party Adverse Effect on<br \/>\n         Buyer.<\/p>\n<p>7.5      NO BREACH: To Buyer&#8217;s Knowledge, Buyer is not party to, or subject to,<br \/>\n         or bound by any provision of any judgment, order, writ, injunction or<br \/>\n         decree of any court, or governmental body, or any statute, rule or<br \/>\n         regulation applicable to Buyer which prohibits or would be violated<br \/>\n         by, or which allows for the termination or modification of this<br \/>\n         Agreement due to Buyer entering into, executing, delivering or<br \/>\n         consummating same.<\/p>\n<p>7.6      COMPLIANCE WITH LAWS AND AGREEMENTS: To Buyer&#8217;s Knowledge, Buyer is in<br \/>\n         substantial compliance with all Permits, contracts and agreements<br \/>\n         relating to its properties, assets and business and in substantial<br \/>\n         compliance with all laws, rules and regulations of federal, state or<br \/>\n         local entities which have jurisdiction over Buyer or its properties,<br \/>\n         assets or business such that any failure of compliance will not have a<br \/>\n         Party Adverse Effect on Buyer.<\/p>\n<p>7.7      INVESTIGATIONS OF ASSETS: In accordance with the provisions of this<br \/>\n         Agreement, Buyer has made, or will make or arrange for others to make,<br \/>\n         such inspection of the Assets as it deems<\/p>\n<p>                                       32<\/p>\n<p>   41<\/p>\n<p>         appropriate, and, except as otherwise provided herein, Buyer will<br \/>\n         accept the Assets &#8220;AS IS,&#8221; &#8220;WHERE IS&#8221; AND &#8220;WITH ALL FAULTS AS TO ALL<br \/>\n         MATTERS.&#8221;<\/p>\n<p>7.8      NO DISTRIBUTION: Buyer is acquiring the Assets for its own account for<br \/>\n         investment purposes and not with a view to or for sale in connection<br \/>\n         with any distribution thereof within the meaning of the Securities Act<br \/>\n         of 1933, as amended, and the rules and regulations thereunder and any<br \/>\n         applicable state securities laws.<\/p>\n<p>7.9      FEDERAL LEASES: If the Assets include any federal leases, Buyer is<br \/>\n         qualified to own such federal leases or will be so qualified at<br \/>\n         Closing.<\/p>\n<p>7.10     CAPITALIZATION OF BUYER; TITLE TO THE SHARES: (a) The authorized<br \/>\n         capital stock of Buyer consists of (i) 55,000,000 shares of common<br \/>\n         stock, par value $0.10 per share, of which 29,259,989 shares are<br \/>\n         issued and outstanding and (ii) 2,500,000 shares of preferred stock,<br \/>\n         par value $0.10 per share, of which 1,000,000 shares are issued and<br \/>\n         outstanding; provided that the number of issued and outstanding shares<br \/>\n         of common stock is subject to increase pursuant to the exercise of<br \/>\n         previously granted options in the ordinary course. Except for this<br \/>\n         Agreement, or as otherwise disclosed in writing to Unocal by Buyer,<br \/>\n         and as set forth in the Buyer&#8217;s SEC Filings, there are no outstanding<br \/>\n         options, warrants, agreements, conversion rights, preemptive rights or<br \/>\n         other rights to subscribe for, purchase or otherwise acquire any of<br \/>\n         the unissued or treasury shares of capital stock of Buyer.<\/p>\n<p>         (b) Upon issuance and delivery to Unocal, the Shares shall be duly<br \/>\n         authorized, validly issued and fully paid and nonassessable, and no<br \/>\n         personal liability shall attach to the ownership thereof. Upon<br \/>\n         transfer of the Shares, from TBI at the Closing, Unocal will have<br \/>\n         valid and marketable title to all the Shares, free and clear of any<br \/>\n         Liens, other than any Liens arising by, through or under Unocal and<br \/>\n         the Stock Ownership and Registration Rights Agreement.<\/p>\n<p>7.11     SEC FILINGS: (a) Buyer has filed with the Securities and Exchange<br \/>\n         Commission (&#8220;SEC&#8221;), and has heretofore made available to Unocal true<br \/>\n         and complete copies of, each form, registration statement, report,<br \/>\n         schedule, proxy or information statement and other document<br \/>\n         (including, without limitation, exhibits and amendments thereto),<br \/>\n         including, without limitation, its Annual Reports to stockholders<br \/>\n         incorporated by reference in certain of such reports, required to be<br \/>\n         filed by it or its predecessors with the SEC since January 1, 1998,<br \/>\n         under the Securities Exchange Act of 1934 (the &#8220;Exchange Act&#8221;) or the<br \/>\n         Securities Act (collectively, the &#8220;SEC Filings&#8221;).<\/p>\n<p>         (b) As of its respective filing date (or, if any SEC Filing was<br \/>\n         amended, as of the date such amendment was filed), each SEC Filing,<br \/>\n         including, without limitation, any financial<\/p>\n<p>                                       33<\/p>\n<p>   42<\/p>\n<p>         statements or schedules included therein, complied as to form in all<br \/>\n         material respects with the applicable requirements of the Securities<br \/>\n         Act and the Exchange Act.<\/p>\n<p>         (c) As of its filing date (or, if any SEC Filing was amended, as of<br \/>\n         the date such amendment was filed), each SEC Filing filed pursuant to<br \/>\n         the Exchange Act did not contain any untrue statement of a material<br \/>\n         fact or omit to state any material fact necessary in order to make the<br \/>\n         statements made therein, in the light of the circumstances under which<br \/>\n         they were made, not misleading.<\/p>\n<p>         (d) Each such registration statement, as amended or supplemented, if<br \/>\n         applicable, filed by TBI pursuant to the Securities Act and<br \/>\n         constituting a SEC Filing did not, as of the date such statement or<br \/>\n         amendment became effective, contain any untrue statement of a material<br \/>\n         fact or omit to state any material fact required to be stated therein<br \/>\n         or necessary to make the statements therein not misleading.<\/p>\n<p>         (e) There are no liabilities of TBI or any of its subsidiaries of any<br \/>\n         kind whatsoever, whether accrued, contingent, absolute, determined,<br \/>\n         determinable or otherwise, and there is no existing condition,<br \/>\n         situation or set of circumstances which could reasonably be expected<br \/>\n         to result in such a liability, other than: (i) liabilities or<br \/>\n         obligations disclosed in the SEC Filings made prior to the date hereof<br \/>\n         or provided for in the TBI Balance Sheet or disclosed in the notes<br \/>\n         thereto; (ii) liabilities or obligations which would not, individually<br \/>\n         or in the aggregate, have a Party Adverse Effect on TBI; and (iii)<br \/>\n         liabilities or obligations under this Agreement.<\/p>\n<p>7.12     FINANCIAL STATEMENTS: The audited consolidated financial statements<br \/>\n         and unaudited consolidated interim financial statements of TBI<br \/>\n         included in the SEC Filings fairly present, in conformity with<br \/>\n         generally accepted accounting practices applied on a consistent basis<br \/>\n         (except as may be indicated in the notes thereto), the consolidated<br \/>\n         financial position of TBI and its subsidiaries as of the dates thereof<br \/>\n         and their consolidated results of operations and cash flows for the<br \/>\n         periods then ended (subject to normal year-end adjustments and the<br \/>\n         absence of financial footnotes in the case of any unaudited interim<br \/>\n         financial statements).<\/p>\n<p>7.13     ABSENCE OF CERTAIN CHANGES: Except as disclosed in the SEC Filings<br \/>\n         made prior to the date hereof or as contemplated by this Agreement or<br \/>\n         with respect to any of the actions referred to in any of clauses (b)<br \/>\n         through (g) below to which Unocal has given its consent, since the TBI<br \/>\n         Balance Sheet Date, the business of TBI and its subsidiaries has been<br \/>\n         conducted in all material respects in the ordinary course consistent<br \/>\n         with past practices and there has not been:<\/p>\n<p>         a)       any event, occurrence, development or set of circumstances or<br \/>\n                  facts which has had, individually or in the aggregate, a<br \/>\n                  Party Adverse Effect on TBI;<\/p>\n<p>                                       34<\/p>\n<p>   43<\/p>\n<p>         b)       any declaration, setting aside or payment of any dividend<br \/>\n                  (other than with respect to its $1.75 Convertible Preferred<br \/>\n                  Stock, Series A) or other distribution with respect to any<br \/>\n                  shares of capital stock of TBI or any of its subsidiaries<br \/>\n                  (other than dividends paid by direct or indirect wholly owned<br \/>\n                  subsidiaries), or any repurchase, redemption or other<br \/>\n                  acquisition by TBI or any of its subsidiaries of any<br \/>\n                  outstanding shares of capital stock or other securities of,<br \/>\n                  or other ownership interests in, TBI or any of its<br \/>\n                  subsidiaries;<\/p>\n<p>         c)       any amendment of any material term of any outstanding<br \/>\n                  security of TBI or any of its subsidiaries;<\/p>\n<p>         d)       any incurrence, assumption or guarantee by TBI or any of its<br \/>\n                  subsidiaries of any material indebtedness for borrowed money<br \/>\n                  other than trade debt or marketing guarantees incurred in the<br \/>\n                  ordinary course and debt incurred pursuant to existing credit<br \/>\n                  facilities and arrangements;<\/p>\n<p>         e)       any creation or other incurrence by TBI or any of its<br \/>\n                  subsidiaries of any Lien on any material asset other than in<br \/>\n                  the ordinary course consistent with past practices;<\/p>\n<p>         f)       any making of any material loan, advance or capital<br \/>\n                  contributions to or investment in any person other than<br \/>\n                  loans, advances or capital contributions to or investments in<br \/>\n                  Wildhorse Energy Partners, L.L.C. or wholly-owned<br \/>\n                  subsidiaries of TBI made in the ordinary course consistent<br \/>\n                  with past practices;<\/p>\n<p>         g)       any change in any method of financial accounting or tax<br \/>\n                  accounting or any accounting practice by TBI or any of its<br \/>\n                  subsidiaries, except for any such change required by reason<br \/>\n                  of a change in generally accepted accounting practices or<br \/>\n                  Regulation S-X promulgated under the Exchange Act;<\/p>\n<p>         h)       any damage, destruction or other Casualty Loss affecting the<br \/>\n                  business or assets of TBI or any of its subsidiaries which,<br \/>\n                  considering the effect of any insurance, would, individually<br \/>\n                  or in the aggregate, have a Party Adverse Effect on TBI; or<\/p>\n<p>         i)       material labor dispute, other than routine individual<br \/>\n                  grievances, or, to the knowledge of TBI, any activity or<br \/>\n                  proceeding by a labor union or representative thereof to<br \/>\n                  organize any material number of employees of TBI or any of<br \/>\n                  its subsidiaries, which employees were not subject to a<br \/>\n                  collective bargaining agreement at the TBI Balance Sheet<br \/>\n                  Date, or any material lockouts, strikes, slowdowns, work<br \/>\n                  stoppages or threats thereof by or with respect to such<br \/>\n                  employees.<\/p>\n<p>                                       35<\/p>\n<p>   44<\/p>\n<p>7.14     REGULATORY AUTHORITY: As of the date hereof, TBI is not subject to<br \/>\n         regulation as: (a) an &#8220;investment company&#8221; or a company &#8220;controlled&#8221;<br \/>\n         by and &#8220;investment company&#8221; within the meaning of the Investment<br \/>\n         Company Act of 1940, as amended; or (b) a &#8220;holding company&#8221;, or a<br \/>\n         &#8220;subsidiary company&#8221;, or an &#8220;affiliate&#8221; of a &#8220;holding company&#8221;, or of<br \/>\n         a &#8220;subsidiary company&#8221; of a &#8220;holding company&#8221;, within the meaning of<br \/>\n         the Public Utility Holding Company Act of 1935, as amended.<\/p>\n<p>7.15     ENVIRONMENTAL MATTERS: To TBI&#8217;s Knowledge, all material environmental<br \/>\n         problems affecting the assets and properties of TBI are referenced in<br \/>\n         the SEC Filings or elsewhere in this Agreement.<\/p>\n<p>7.16     BROKERS: Buyer has not incurred any obligation or liability,<br \/>\n         contingent or otherwise, for any fee payable to a broker or finder<br \/>\n         with respect to the matters provided for in this Agreement which could<br \/>\n         be attributable to Unocal.<\/p>\n<p>                                   SECTION 8<\/p>\n<p>               CONDITIONS PRECEDENT TO THE OBLIGATIONS OF UNOCAL<\/p>\n<p>         The obligation of Unocal to consummate the transactions contemplated<br \/>\nby this Agreement shall be subject to the fulfillment at Closing of each of the<br \/>\nfollowing conditions, each of which may be waived by Unocal except as otherwise<br \/>\nrequired by law:<\/p>\n<p>8.1      PURCHASE PRICE:  At Closing, Buyer shall deliver:<\/p>\n<p>         (i)      an amount equal to the Adjusted Cash Purchase Price plus or<br \/>\n                  minus as applicable the Cash Settlement (to the extent same<br \/>\n                  is a positive number); and<\/p>\n<p>         (ii)     certificates representing the Shares.<\/p>\n<p>8.2      BUYER&#8217;S REPRESENTATIONS AND WARRANTIES TRUE AND CORRECT: The<br \/>\n         representations and warranties of Buyer contained herein on the date<br \/>\n         hereof shall have been true and correct in all material respects, and<br \/>\n         shall be correct in all material respects on and as of the Closing<br \/>\n         with the same force and effect as though made at and as of such time,<br \/>\n         except for the representations and warranties specifically relating to<br \/>\n         a time or times other than the Closing, or as may be affected by<br \/>\n         transactions contemplated hereby.<\/p>\n<p>8.3      OFFICER&#8217;S CERTIFICATE: Buyer shall have furnished Unocal a certificate<br \/>\n         of an officer of Buyer certifying that except as specifically set<br \/>\n         forth in such certificate:<\/p>\n<p>                                       36<\/p>\n<p>   45<\/p>\n<p>         (i)      the representations and warranties of Buyer contained in this<br \/>\n                  Agreement are true and correct in all material respects on<br \/>\n                  and as of the Closing Date with the same force and effect as<br \/>\n                  though made at and as of such time, except for<br \/>\n                  representations and warranties specifically relating to a<br \/>\n                  time or times other than the Closing Date, or except as may<br \/>\n                  be affected by the transactions contemplated hereby; and<\/p>\n<p>         (ii)     Buyer has performed all of its obligations contained in this<br \/>\n                  Agreement required to be performed by it prior to Closing.<\/p>\n<p>8.4      OPINION OF COUNSEL: Buyer shall have furnished Unocal an opinion<br \/>\n         rendered by legal counsel of Buyer, dated as of the Closing, to the<br \/>\n         effect that:<\/p>\n<p>         (i)      Buyer is a corporation duly organized, validly existing, and<br \/>\n                  in good standing under the laws of the state wherein it was<br \/>\n                  incorporated or organized and is authorized to do business in<br \/>\n                  the State of Delaware;<\/p>\n<p>         (ii)     Buyer has full power to carry out the transactions provided<br \/>\n                  for in this Agreement; this Agreement has been duly executed<br \/>\n                  and delivered by Buyer; and this Agreement is the legal and<br \/>\n                  binding obligation of Buyer, enforceable in accordance with<br \/>\n                  its terms except as enforceability may be limited or denied<br \/>\n                  by bankruptcy, insolvency, reorganization, moratorium or<br \/>\n                  similar laws from time to time in effect that affect the<br \/>\n                  rights of creditors generally and except as enforcement or<br \/>\n                  remedies may be limited or denied by general equitable<br \/>\n                  principles;<\/p>\n<p>         (iii)    the execution, delivery and performance of this Agreement by<br \/>\n                  Buyer and the consummation by Buyer of the transactions<br \/>\n                  contemplated by this Agreement will not constitute a breach,<br \/>\n                  violation, or default under the Certificate of Incorporation<br \/>\n                  or Bylaws of Buyer; and<\/p>\n<p>         (iv)     the authorized capital stock of Buyer is as reflected in<br \/>\n                  Section 7.10 hereof and upon issuance and delivery to Unocal<br \/>\n                  upon the consummation of the transaction contemplated by this<br \/>\n                  Agreement, the Shares are duly authorized and are fully paid<br \/>\n                  and nonassessable.<\/p>\n<p>8.5      PRE-CLOSING PERFORMANCE: Buyer shall have performed, observed or<br \/>\n         complied in all material respects with all its obligations and<br \/>\n         conditions required by this Agreement to be performed, observed or<br \/>\n         complied with by it at or prior to Closing.<\/p>\n<p>8.6      AUTHORIZATION: All corporate actions necessary to authorize the<br \/>\n         execution, delivery and performance of this Agreement and the<br \/>\n         consummation of the transactions contemplated hereby shall have been<br \/>\n         duly and validly taken by Buyer.<\/p>\n<p>                                       37<\/p>\n<p>   46<\/p>\n<p>8.7      ABSENCE OF LITIGATION: No litigation or administrative proceeding<br \/>\n         shall be pending (or threatened), and no investigation shall have been<br \/>\n         commenced (and be pending), by Buyer or any third party seeking to<br \/>\n         restrain or prohibit (or questioning the validity or legality of) the<br \/>\n         consummation of the transactions contemplated by this Agreement or<br \/>\n         seeking damages in connection therewith which makes it unreasonable to<br \/>\n         proceed with the consummation of the transactions contemplated hereby.<\/p>\n<p>8.8      BONDS: Buyer shall have delivered to Unocal either copies of such<br \/>\n         bonds, in form and substance and issued by corporate sureties<br \/>\n         reasonably satisfactory to Unocal, covering the Assets as may be<br \/>\n         required under any laws, rules or regulations of any federal, Indian<br \/>\n         tribe, state or local government agencies having jurisdiction over the<br \/>\n         Assets, or a commitment by a surety company, reasonably satisfactory<br \/>\n         to Unocal, to issue such bonds upon Closing.<\/p>\n<p>8.9      HART-SCOTT-RODINO ACT: All approvals required by the Hart-Scott-Rodino<br \/>\n         Act shall have been received or all applicable waiting periods shall<br \/>\n         have lapsed.<\/p>\n<p>8.10     STOCK OWNERSHIP AND REGISTRATION RIGHTS AGREEMENT: Buyer and Unocal<br \/>\n         shall have entered into the Stock Ownership and Registration Rights<br \/>\n         Agreement.<\/p>\n<p>8.11     CERTIFICATES OF INSURANCE: At the Closing, Buyer shall deliver to<br \/>\n         Unocal documentation reflecting that Buyer has obtained the necessary<br \/>\n         insurance required under applicable laws or regulations to hold the<br \/>\n         Assets.<\/p>\n<p>8.12     PERMITS, CONSENTS AND PREFERENTIAL PURCHASE RIGHTS: Any Permits or<br \/>\n         consents necessary to effect the Closing and to conduct all operations<br \/>\n         contemplated hereunder shall have been obtained and the applicable<br \/>\n         time period for the exercise of preferential purchase rights<br \/>\n         respecting any of the Assets held by persons other than Unocal or<br \/>\n         Buyer shall have expired or such rights have been exercised or waived.<\/p>\n<p>8.13     SATISFACTORY RESULTS OF UNOCAL&#8217;S DILIGENCE: By the end of the Due<br \/>\n         Diligence Period, Unocal shall be satisfied, in its sole discretion,<br \/>\n         with the results of its due diligence provided that any acknowledgment<br \/>\n         to this effect shall not abrogate or relieve Buyer from its<br \/>\n         obligations to Unocal under this Agreement, including obligations<br \/>\n         under Section 14 below.<\/p>\n<p>                                   SECTION 9<\/p>\n<p>                CONDITIONS PRECEDENT TO THE OBLIGATIONS OF BUYER<\/p>\n<p>         The obligations of Buyer to consummate the transactions contemplated<br \/>\nby this Agreement shall be subject to the fulfillment, at or prior to Closing,<br \/>\nof each of the following conditions, each of which may be waived by Buyer<br \/>\nexcept as otherwise required by law:<\/p>\n<p>                                       38<\/p>\n<p>   47<\/p>\n<p>9.1      DELIVERY OF CASH SETTLEMENT: At Closing, Unocal shall pay to Buyer, if<br \/>\n         applicable, an amount equal to the Adjusted Cash Purchase Price plus<br \/>\n         or minus, as applicable, the Cash Settlement (to the extent same is a<br \/>\n         negative number) described in Section 2.6.<\/p>\n<p>9.2      DELIVERY OF INSTRUMENTS OF TRANSFER: At Closing, Unocal and its<br \/>\n         Affiliates shall deliver to Buyer executed, and where appropriate<br \/>\n         recordable, bills of sale, lease assignments, and other instruments of<br \/>\n         conveyance as required herein.<\/p>\n<p>9.3      UNOCAL&#8217;S REPRESENTATIONS AND WARRANTIES TRUE AND CORRECT: The<br \/>\n         representations and warranties of Unocal contained herein on the date<br \/>\n         hereof shall have been true and correct in all material respects, and<br \/>\n         shall be correct in all material respects on and as of the Closing<br \/>\n         with the same force and effect as though made at and as of such time,<br \/>\n         except for the representations and warranties specifically relating to<br \/>\n         a time or times other than the Closing, or as may be affected by<br \/>\n         transactions contemplated hereby.<\/p>\n<p>9.4      OFFICER&#8217;S CERTIFICATE: Unocal shall have furnished Buyer a certificate<br \/>\n         of an officer of Unocal certifying that except as specifically set<br \/>\n         forth in such certificate:<\/p>\n<p>         (i)      the representations and warranties of Unocal contained in<br \/>\n                  this Agreement are true and correct in all material respects<br \/>\n                  on and as of the Closing Date with the same force and effect<br \/>\n                  as though made at and as of such time, except for<br \/>\n                  representations and warranties specifically relating to a<br \/>\n                  time or times other than the Closing Date, or except as may<br \/>\n                  be affected by the transactions contemplated hereby; and<\/p>\n<p>         (ii)     Unocal has performed all of its obligations contained in this<br \/>\n                  Agreement required to be performed by it prior to Closing.<\/p>\n<p>9.5      OPINION OF COUNSEL: Unocal shall have furnished Buyer an opinion<br \/>\n         rendered by legal counsel for Unocal, dated as of the Closing, to the<br \/>\n         effect that:<\/p>\n<p>         (i)      Unocal is a Corporation duly organized, validly existing, and<br \/>\n                  in good standing under the laws of the state of California<br \/>\n                  and is authorized to do business in the State of Texas; and<\/p>\n<p>         (ii)     Unocal has full power to carry out the transactions provided<br \/>\n                  for in this Agreement; this Agreement has been duly executed<br \/>\n                  and delivered by Unocal; and this Agreement is the legal and<br \/>\n                  binding obligation of Unocal, enforceable in accordance with<br \/>\n                  its terms except as enforceability may be limited or denied<br \/>\n                  by bankruptcy, insolvency, reorganization, moratorium or<br \/>\n                  similar laws from time to time in effect that affect the<br \/>\n                  rights of creditors generally and except as enforcement or<br \/>\n                  remedies may be limited or denied by general equitable<br \/>\n                  principles; and<\/p>\n<p>                                       39<\/p>\n<p>   48<\/p>\n<p>         (iii)    the execution, delivery and performance of this Agreement by<br \/>\n                  Unocal and the consummation by Unocal of the transactions<br \/>\n                  contemplated by this Agreement will not constitute a breach,<br \/>\n                  violation, or default under the Articles of Incorporation or<br \/>\n                  Bylaws of Unocal.<\/p>\n<p>9.6      PRE-CLOSING PERFORMANCE: Unocal shall have performed, observed or<br \/>\n         complied in all material respects with all its obligations and<br \/>\n         conditions required by this Agreement to be performed, observed or<br \/>\n         complied with by it at or prior to Closing.<\/p>\n<p>9.7      AUTHORIZATION: All corporate actions necessary to authorize the<br \/>\n         execution, delivery and performance of this Agreement and the<br \/>\n         consummation of the transactions contemplated hereby shall have been<br \/>\n         duly and validly taken by Unocal.<\/p>\n<p>9.8      ABSENCE OF LITIGATION: No litigation or administrative proceeding<br \/>\n         shall be pending (or threatened), and no investigation shall have been<br \/>\n         commenced (and be pending), by Unocal or by a third party against<br \/>\n         Unocal seeking to restrain or prohibit (or questioning the validity or<br \/>\n         legality of) the consummation of the transactions contemplated by this<br \/>\n         Agreement or seeking damages in connection therewith which makes it<br \/>\n         unreasonable to proceed with the consummation of the transactions<br \/>\n         contemplated hereby.<\/p>\n<p>9.9      HART-SCOTT RODINO ACT: All approvals required by the Hart-Scott-Rodino<br \/>\n         Act shall have been received or all applicable waiting periods shall<br \/>\n         have lapsed.<\/p>\n<p>9.10     STOCK OWNERSHIP AND REGISTRATION RIGHTS AGREEMENT: Buyer and Unocal<br \/>\n         shall have entered into the Stock Ownership and Registration Rights<br \/>\n         Agreement in the form of Exhibit &#8220;J.&#8221;<\/p>\n<p>9.11     CONSENTS: The approvals and consents specified in the Schedule 9.11<br \/>\n         have been obtained or waived. By listing any potential consent<br \/>\n         requirement on Schedule 9.11, neither Unocal nor Buyer admits,<br \/>\n         represents or warrants that such potential consent requirement is<br \/>\n         applicable to the transactions contemplated by this Agreement or that<br \/>\n         such listing is an exhaustive list of all material consents or<br \/>\n         approvals.<\/p>\n<p>9.12     SATISFACTORY RESULTS OF BUYER&#8217;S DILIGENCE: By the end of the Due<br \/>\n         Diligence Period, Buyer shall be satisfied, in its sole discretion,<br \/>\n         with the results of its due diligence, provided that any<br \/>\n         acknowledgment to this effect shall not abrogate or relieve Unocal<br \/>\n         from its obligations to Buyer under this Agreement, including<br \/>\n         obligations under Section 14 below.<\/p>\n<p>9.13     NO MATERIAL CHANGES: Between the Effective Date and the Closing Date<br \/>\n         there shall have been no change in the production volumes, pressures,<br \/>\n         quality or makeup of production, of the Wells or any other change in<br \/>\n         the Assets, the effect of any of which reasonably would be<\/p>\n<p>                                       40<\/p>\n<p>   49<\/p>\n<p>         expected to negatively affect the value of the Assets, taken as a<br \/>\n         whole, by 20% of the Purchase Price or more, except, in all cases, for<br \/>\n         (i) depletions or routine changes which occur in the normal course of<br \/>\n         the day to day ownership or operation of the Wells or the other<br \/>\n         Assets, (ii) changes that result from variances in markets for<br \/>\n         substances produced from such Wells or other Assets or (iii) other<br \/>\n         changes affecting the oil and gas industry generally.<\/p>\n<p>                                   SECTION 10<\/p>\n<p>                                   COVENANTS<\/p>\n<p>10.1 INVESTIGATION AND DECISION: The Parties further covenant as follows:<\/p>\n<p>          (a)  INVESTIGATION OF ASSETS: During the Due Diligence Period, Buyer<br \/>\n               shall: (i) make, or arrange for others to make, such inspection<br \/>\n               and investigation of the Assets and Assumed Liabilities as it<br \/>\n               deems appropriate; (ii) investigate and have knowledge of<br \/>\n               operative or proposed laws to which the Assets are or may be<br \/>\n               subject; (iii) accept the Assets and Assumed Liabilities upon<br \/>\n               the basis of its review and determination of the applicability<br \/>\n               and effect of such laws; (iv) have reviewed and evaluated any<br \/>\n               data room materials or other materials to which access has been<br \/>\n               provided to Buyer by Unocal under this Agreement; and (v) have<br \/>\n               made such investigations of the title, condition, status under<br \/>\n               Environmental Laws, oil and gas laws and any other aspects of<br \/>\n               the Assets and Assumed Liabilities as may be necessary or<br \/>\n               appropriate. Buyer agrees that such inspections shall not<br \/>\n               unreasonably interfere with the business and operations of<br \/>\n               Unocal, and that such inspections and all such documents shall<br \/>\n               be subject to the Confidentiality Agreement.<\/p>\n<p>          (b)  INVESTIGATION OF BUYER: During the Due Diligence Period, Unocal<br \/>\n               shall: (i) make, or arrange for others to make, such inspection<br \/>\n               and investigation of Buyer as it deems appropriate in order to<br \/>\n               evaluate the merits and risks inherent in holding TBI Common<br \/>\n               Stock; (ii) investigate and have knowledge of operative or<br \/>\n               proposed laws to which TBI Common Stock is or may be subject;<br \/>\n               and (iii) accept TBI Common Stock based on its review and<br \/>\n               determination of the applicability and effect of such laws.<br \/>\n               Unocal agrees that such inspections shall not unreasonably<br \/>\n               interfere with the business and operations of Buyer, and that<br \/>\n               such inspections and all such documents shall be subject to the<br \/>\n               Confidentiality Agreement.<\/p>\n<p>          (c)  INDEPENDENT DECISION:<\/p>\n<p>                  (i)      Buyer has made its own independent judgment of the<br \/>\n                           commercial potential, condition and usefulness of<br \/>\n                           the Assets, taking into consideration all current<br \/>\n                           Environmental Laws and other laws and the likelihood<br \/>\n                           that such<\/p>\n<p>                                       41<\/p>\n<p>   50<\/p>\n<p>                           Environmental Laws and other laws will change in the<br \/>\n                           future. Buyer has such knowledge and experience in<br \/>\n                           business and financial affairs in general,<br \/>\n                           securities and investments, and of the oil and gas,<br \/>\n                           as to be capable of evaluating the merits and risks<br \/>\n                           of purchasing the Assets.<\/p>\n<p>                  (ii)     Unocal has made it own independent judgment of the<br \/>\n                           business, finances and prospects of the Buyer.<br \/>\n                           Unocal is a sophisticated investor with knowledge<br \/>\n                           and experience in business and financial affairs in<br \/>\n                           general, securities and investments, and of oil and<br \/>\n                           gas, as to be capable of evaluating the merits and<br \/>\n                           risks of holding TBI Common Stock.<\/p>\n<p>10.2     ACCESS TO INFORMATION:<\/p>\n<p>         (a)   In connection with the terms of the Confidentiality Agreement<br \/>\n               regarding disclosures by Unocal to Buyer, Unocal shall permit<br \/>\n               Buyer reasonable access to the Assets and to those files in<br \/>\n               Unocal&#8217;s possession relating thereto which are not proprietary,<br \/>\n               privileged, restricted or prohibited from being disclosed, which<br \/>\n               may include, without limitation, access to title, land,<br \/>\n               environmental, accounting, geological, engineering, reservoir,<br \/>\n               production, and other data and information regarding this<br \/>\n               transaction; provided, however, Unocal shall provide a generic<br \/>\n               list of categories of information not delivered in accordance<br \/>\n               with the term of this Section 10.2(a).<\/p>\n<p>         (b)   In connection with the terms of the Confidentiality Agreement<br \/>\n               regarding disclosures by Buyer to Unocal (the &#8220;TBI<br \/>\n               Confidentiality Agreement&#8221;), Buyer shall permit Unocal<br \/>\n               reasonable access to information as Unocal may reasonably<br \/>\n               request under the terms of the TBI Confidentiality Agreement, in<br \/>\n               respect of Buyer and its businesses including without limitation<br \/>\n               its books and records, Board minutes, corporate minute books,<br \/>\n               stock transfer records, documentation filed with any local,<br \/>\n               state or federal governmental authority or agency (including,<br \/>\n               but not limited to, any taxing authorities and the Securities<br \/>\n               and Exchange Commission) accounts, contracts, properties,<br \/>\n               assets, operations and facilities of or relating to Buyer for<br \/>\n               purposes of evaluating and\/or consummation the transactions<br \/>\n               contemplated by this Agreement. In connection with the terms of<br \/>\n               the TBI Confidentiality Agreement, TBI shall, with reasonable<br \/>\n               notice and under its supervision, permit Unocal to contact and<br \/>\n               meet with those employees designated by Buyer that are involved<br \/>\n               in Buyer at such place or places and at such times as reasonably<br \/>\n               designated by Unocal. Buyer shall permit Unocal to make copies<br \/>\n               of the information relating to TBI contained in the books, files<br \/>\n               and records of Buyer. Any data and information obtained by<br \/>\n               Unocal from Buyer shall be kept confidential and shall be<br \/>\n               returned to Buyer upon its written request if for any reason<br \/>\n               this transaction does not close on the mutually agreed closing<br \/>\n               date.<\/p>\n<p>                                       42<\/p>\n<p>   51<\/p>\n<p>10.3     GAS IMBALANCES AND PIPELINE IMBALANCES:<\/p>\n<p>         (i)      As to any Gas Imbalances which exist, the Parties agree that:<\/p>\n<p>                  (a)      Unocal will furnish Buyer with a statement, in the<br \/>\n                           form of Schedule 6.6, showing the most current<br \/>\n                           estimate of the Gas Imbalances with respect to any<br \/>\n                           gas production, storage, processing or other<br \/>\n                           imbalance attributable to substances produced from<br \/>\n                           the Leasehold Interests or the Oil and Gas<br \/>\n                           Properties between the owners as of the Effective<br \/>\n                           Date.<\/p>\n<p>                  (b)      From and after the Effective Date, any and all<br \/>\n                           benefits, obligations and liabilities associated with<br \/>\n                           Gas Imbalances shall accrue to and be the<br \/>\n                           responsibility of Buyer. Buyer shall assume Unocal&#8217;s<br \/>\n                           overproduced or underproduced position in the wells<br \/>\n                           located on the Leasehold Properties, as of the<br \/>\n                           Effective Date, including but not limited to the<br \/>\n                           responsibility for the payment of royalties on the<br \/>\n                           underproduced volume, if any, of such gas which<br \/>\n                           Unocal is entitled to take and any obligation to<br \/>\n                           balance whether in cash or in kind. The Final<br \/>\n                           Accounting shall include an adjustment for any Gas<br \/>\n                           Imbalance differences between the volume shown on<br \/>\n                           Schedule 6.6 and the actual Gas Imbalances as of the<br \/>\n                           Effective Date. Notwithstanding the actual amounts<br \/>\n                           or proceeds that Buyer may receive from the Gas<br \/>\n                           Imbalances due to underproduced positions, or the<br \/>\n                           actual amounts that Buyer must pay with respect to<br \/>\n                           Gas Imbalances due to overproduced positions, the<br \/>\n                           parties shall settle such Gas Imbalances as between<br \/>\n                           themselves, and the adjustments to the Purchase Price<br \/>\n                           and\/or at the Final Accounting will be calculated<br \/>\n                           using a settlement price of $1.05 per Mcf (thousand<br \/>\n                           cubic feet) with respect to production imbalances.<\/p>\n<p>         (ii)     As to any Pipeline Imbalances which exist, the Parties agree<br \/>\n                  that:<\/p>\n<p>                  (a)      Unocal will furnish Buyer with a statement, in the<br \/>\n                           form of Schedule 6.6, showing the most current<br \/>\n                           estimate of the Pipeline Imbalances with respect to<br \/>\n                           any pipeline shipments of the Hydrocarbons through<br \/>\n                           the Pipeline Assets.<\/p>\n<p>                  (b)      From and after the Effective Date, any and all<br \/>\n                           benefits, obligations and liabilities associated<br \/>\n                           with Pipeline Imbalances shall accrue to and be the<br \/>\n                           responsibility of Buyer. Buyer shall assume Unocal&#8217;s<br \/>\n                           Pipeline Imbalances position with respect to<br \/>\n                           Hydrocarbons shipped through the Pipeline Assets as<br \/>\n                           of the Effective Date. The Final Accounting shall<br \/>\n                           include an adjustment for any Pipeline Imbalance<br \/>\n                           differences between the value shown on Schedule 6.6<br \/>\n                           and the actual Pipeline Imbalances as of the<br \/>\n                           Effective Date. The parties<\/p>\n<p>                                       43<\/p>\n<p>   52<\/p>\n<p>                           shall settle such Pipeline Imbalances as between<br \/>\n                           themselves, and the adjustments to the Purchase<br \/>\n                           Price and\/or at the Final Accounting will be<br \/>\n                           calculated using a mutually agreed settlement price<br \/>\n                           with respect to pipeline imbalances. If the parties<br \/>\n                           are unable to mutually agree upon an appropriate<br \/>\n                           settlement price, such price shall be determined by<br \/>\n                           arbitration.<\/p>\n<p>10.4     HART-SCOTT-RODINO ACT: Each Party shall prepare and submit, within<br \/>\n         fifteen (15) days of the execution of this Agreement, any necessary<br \/>\n         filings in connection with the transactions contemplated by this<br \/>\n         Agreement under the Hart-Scott-Rodino Act, but each Party shall be<br \/>\n         responsible for its own filing costs and expenses. The Parties shall<br \/>\n         request expedited treatment of such filing by the Federal Trade<br \/>\n         Commission, shall promptly make any appropriate or necessary<br \/>\n         subsequent or supplemental filings, and shall furnish to each other<br \/>\n         copies of all filings made under the Hart-Scott-Rodino Act at the same<br \/>\n         time they are filed with the government.<\/p>\n<p>10.5     THIRD-PARTY CONSENTS: Certain of the transfers contemplated by this<br \/>\n         Agreement are subject to various forms of third-party consents,<br \/>\n         including compliance with the provisions of the Hart-Scott-Rodino Act.<br \/>\n         Unocal (with Buyer&#8217;s cooperation) shall promptly take such action as<br \/>\n         may be required to obtain all necessary consents prior to Closing.<br \/>\n         Unocal and Buyer agree that to the extent any contract, Permit or<br \/>\n         other Assets that would otherwise be assigned under this Agreement is<br \/>\n         not capable of being assigned, transferred, subleased or sublicensed<br \/>\n         without the consent of, or waiver by any other party thereto, or any<br \/>\n         other Person, or if such assignment, transfer, sublease or sublicense<br \/>\n         or attempted assignment, transfer, sublease or sublicense would<br \/>\n         constitute a breach thereof, or a violation of any law, this Agreement<br \/>\n         shall not constitute an assignment, transfer, sublease or sublicense,<br \/>\n         or an attempted assignment, transfer, sublease or sublicense of any<br \/>\n         such contract, Permit or Asset. With respect to each contract that,<br \/>\n         but for the reasons set forth in the first sentence of this Section,<br \/>\n         would be assigned, Unocal agrees to provide Buyer with the benefits<br \/>\n         (including the right to terminate any such contract or Permit in<br \/>\n         accordance with the terms thereof) of such contract, Permit or Asset,<br \/>\n         to the extent related to transactions or periods that occur at or<br \/>\n         after Closing, and to the extent it is possible to do so; and, if and<br \/>\n         to the extent such benefits are provided to Buyer, Buyer agrees to<br \/>\n         observe and perform such contract or Permit. Unocal shall continue to<br \/>\n         use its reasonable efforts to obtain an assignment to Buyer of each<br \/>\n         contract, Permit or Asset that, but for the reasons set forth in the<br \/>\n         first sentence of this Section, would be assigned; provided, however,<br \/>\n         that Unocal shall not be required to pay any consideration or suffer<br \/>\n         any financial disadvantage to obtain such assignment. Buyer recognizes<br \/>\n         and assumes full responsibility for obtaining any required<br \/>\n         Governmental Approvals and Governmental Lessor Approvals relating to<br \/>\n         transfer of the Assets only to the extent such approvals or consents<br \/>\n         are normally obtained after Closing, and shall furnish Unocal with<br \/>\n         proof of such consents or approvals. Unocal agrees to cooperate with<br \/>\n         Buyer in obtaining such post-Closing approvals or consents. Unocal<br \/>\n         shall have no obligation to incur any expenses or any fees to assist<br \/>\n         Buyer in obtaining<\/p>\n<p>                                       44<\/p>\n<p>   53<\/p>\n<p>         such approvals or consents. Buyer agrees that if it is unable to<br \/>\n         obtain any such post-Closing consent required to assign the interests<br \/>\n         being conveyed pursuant to this Agreement, it will pursue such consent<br \/>\n         using all means available, including legal action, without incurring<br \/>\n         unreasonable expense, at its sole cost and expense, and will indemnify<br \/>\n         and hold Unocal and Pipeline harmless from and against any and all<br \/>\n         Claims arising from Unocal&#8217;s conveying such interests prior to<br \/>\n         obtaining all applicable consents to assign. As to any and all<br \/>\n         third-party consents which are not listed on Schedule 9.11, which are<br \/>\n         asserted post-Closing and which defeat or extinguish Unocal&#8217;s<br \/>\n         conveyance of an Asset, Unocal and Buyer agree to apply retroactively<br \/>\n         Section 10.5 with respect thereto in order to treat such consents as<br \/>\n         though they were consents which were known but were unable to be<br \/>\n         obtained prior to the Closing.<\/p>\n<p>10.6     COMPLETION OF DUE DILIGENCE: Within three (3) days after the end of<br \/>\n         the Due Diligence Period, Buyer and Unocal (as the case may be) shall<br \/>\n         give to the other party a certificate of satisfactory completion of<br \/>\n         due diligence and substantially in the form attached hereto as Exhibit<br \/>\n         &#8220;H-1&#8221;<\/p>\n<p>10.7     ADDITIONAL AGREEMENTS: Unocal and Buyer shall execute such further<br \/>\n         documents and instruments, reasonably requested by either Party, as<br \/>\n         may be necessary or reasonably desirable to consummate the<br \/>\n         transactions contemplated by this Agreement or any part thereof.<br \/>\n         Subject to the other terms and conditions of this Agreement, each of<br \/>\n         the Parties hereto agrees to use its best efforts at its own expense<br \/>\n         to take, or cause to be taken, all actions and to do, or cause to be<br \/>\n         done, all things necessary, proper or advisable under applicable laws<br \/>\n         to consummate and make effective the transactions contemplated by this<br \/>\n         Agreement.<\/p>\n<p>10.8     PAYMENT OF CERTAIN EXPENSES DUE AND PAYABLE AFTER THE CLOSING DATE:<br \/>\n         For a time period of up to 90 days after Closing, Unocal shall<br \/>\n         continue to administer certain mutually agreed lease maintenance<br \/>\n         accounting activities in respect of the Assets including only the<br \/>\n         payment of lease rentals and minimum royalty payments and Buyer shall<br \/>\n         undertake the assumption of such responsibilities as soon as<br \/>\n         practicable after Closing and compensation shall be such amount as is<br \/>\n         mutually agreed by the parties (provided if the parties cannot<br \/>\n         mutually agree on compensation, then such compensation shall be<br \/>\n         determined by arbitration). Buyer shall pay, as and when due, all fees<br \/>\n         and bills due and payable after the Closing Date in respect of the<br \/>\n         Assets, and Unocal shall reimburse Buyer within thirty (30) days after<br \/>\n         invoice for any amounts under such bills attributable to any period<br \/>\n         prior to the Effective Date for which it is responsible hereunder;<br \/>\n         provided, however that if after Closing Unocal is obligated to<br \/>\n         continue as operator under an existing agreement Unocal shall make<br \/>\n         payments for Buyer&#8217;s account and at Buyer&#8217;s expense.<\/p>\n<p>10.9     NOTIFICATION OF CERTAIN MATTERS: Between the Effective Date and<br \/>\n         Closing, Unocal and Buyer will each give prompt notice to the other of<br \/>\n         (i) any information that indicates that any representation or warranty<br \/>\n         contained herein was not true and correct as of the date hereof or<\/p>\n<p>                                       45<\/p>\n<p>   54<\/p>\n<p>         will not be true and correct as of the Closing Date; (ii) the<br \/>\n         occurrence of any event which will result, or has a reasonable<br \/>\n         prospect of resulting, in the failure to consummate the transactions<br \/>\n         contemplated hereunder on or before the Closing Date or to satisfy a<br \/>\n         condition to Closing herein as the case may be; (iii) any notice or<br \/>\n         other communication from any third party alleging that the consent or<br \/>\n         waiver of such third party is required in connection with the<br \/>\n         execution and delivery of this Agreement or the consummation of the<br \/>\n         transactions contemplated by this Agreement; and (iv) any notice of,<br \/>\n         or other communication relating to any default or event which, with<br \/>\n         notice or lapse of time or both, would become a default under any<br \/>\n         contract to be assigned at Closing.<\/p>\n<p>10.10    ANNOUNCEMENTS: At all times prior to Closing or termination of this<br \/>\n         Agreement, Unocal and Buyer, including their respective Affiliates,<br \/>\n         shall use their best efforts to cooperate in the development and<br \/>\n         distribution of all news releases and other public disclosures<br \/>\n         relating to the proposed transactions described in this Agreement,<br \/>\n         and agree that no such releases or disclosures will be made without<br \/>\n         prior notice to the other Party; provided, however, that either Party<br \/>\n         may make all disclosures which are required or prudent under<br \/>\n         applicable laws, including, but not limited to, rules, regulations<br \/>\n         and guidelines of the SEC and applicable stock exchanges.<\/p>\n<p>10.11    TERMINATION OF GUARANTEES AND OTHER COMMITMENTS:<\/p>\n<p>         (i)      Subject to applicable laws, as of the Closing Date, all of<br \/>\n                  the following shall be canceled or terminated as to Buyer:<br \/>\n                  (i) undertakings, comfort letters or guarantees by Unocal or<br \/>\n                  any of its Affiliates to third parties in connection with the<br \/>\n                  Assets; (ii) letters of credit, surety bonds, and related<br \/>\n                  indemnity agreements arranged and maintained by Unocal or any<br \/>\n                  of its Affiliates with respect to the Assets; and (iii) any<br \/>\n                  credit card accounts issued by Unocal or any of its<br \/>\n                  Affiliates to any employees in connection with the Assets.<\/p>\n<p>         (ii)     Buyer understands and agrees that all insurance policies,<br \/>\n                  provided to or for the Assets through Unocal, any Affiliate<br \/>\n                  of Unocal, or a self-insurance program of Unocal will be<br \/>\n                  terminated as to the Assets as of the Closing Date.<\/p>\n<p>         (iii)    Unocal and Unocal&#8217;s Affiliates shall have no responsibility<br \/>\n                  or liability under this Agreement to provide for insurance<br \/>\n                  coverage or any such security for the Assets in any manner<br \/>\n                  whatsoever after the Closing Date, except as otherwise set<br \/>\n                  forth in this Agreement.<\/p>\n<p>10.12    ACCESS TO GEOLOGIC AND GEOPHYSICAL INFORMATION:  As long as the same<br \/>\n         remains in Buyer&#8217;s possession or control, Unocal retains the right to<br \/>\n         copy, at Unocal&#8217;s expense, any and all<\/p>\n<p>                                       46<\/p>\n<p>   55<\/p>\n<p>         geologic and geophysical information licensed to Buyer hereunder, and<br \/>\n         Buyer agrees to co-operate with Unocal in granting access to such<br \/>\n         information.<\/p>\n<p>10.13    COLLECTION OF CERTAIN INSURANCE PROCEEDS: Buyer may benefit from the<br \/>\n         collection by Unocal of the proceeds of certain insurance maintained<br \/>\n         by Unocal to the extent provided in Section 2.1(xi). Unocal agrees to<br \/>\n         pursue in good faith the collection of such insurance proceeds to the<br \/>\n         extent that Buyer would benefit from the collection thereof.<\/p>\n<p>                                   SECTION 11<\/p>\n<p>                                EMPLOYEE MATTERS<\/p>\n<p>11.1     OFFER TO EMPLOYEES: Within five (5) days following execution of this<br \/>\n         Agreement, Buyer will offer employment to all Lisbon Plant-Based<br \/>\n         Employees for comparable positions and base salary for a minimum of<br \/>\n         six months following the Closing. For purposes hereof, Lisbon<br \/>\n         Plant-Based Employees shall include those persons specified on<br \/>\n         Schedule 11.1 hereto.<\/p>\n<p>11.2     RECOGNITION OF SERVICE TIME: In determining available benefits and<br \/>\n         vesting of benefits under TBI&#8217;s employee benefit plans, including, but<br \/>\n         not limited to, vacation benefits, Buyer will recognize and credit the<br \/>\n         Lisbon Plant-Based Employees who accept employment with Buyer for all<br \/>\n         years of service to Unocal or its Affiliates.<\/p>\n<p>11.3     HIRED EMPLOYEE LIST: Within ten (10) days before Closing, Buyer shall<br \/>\n         provide Unocal with a list of all Lisbon Plant-Based Employees who<br \/>\n         accept employment with Buyer and their base pay rate.<\/p>\n<p>11.4     TERMINATED EMPLOYEES: For any Lisbon Plant-Based Employee hired by<br \/>\n         Buyer and terminated without cause by Buyer within 180 days of<br \/>\n         Closing, Buyer shall pay such employee severance benefits in<br \/>\n         accordance with Buyer&#8217;s severance practices.<\/p>\n<p>11.5     EMPLOYMENT RESTRICTION: As partial consideration for the Assets to be<br \/>\n         sold hereunder by Unocal, Buyer hereby agrees that Buyer will not<br \/>\n         employ or contract the services of any employee of Unocal located or<br \/>\n         assigned to offices or facilities of Unocal in Texas and\/or Louisiana<br \/>\n         (other than Bruce Gomendi) for twelve months after the Closing Date.<br \/>\n         If Buyer breaches this employment restriction, Buyer shall pay damages<br \/>\n         to Unocal equivalent to a six-month salary (at the rate which Unocal<br \/>\n         was then paying to such employee); provided, however, that the<br \/>\n         foregoing will in no way restrict the right of either party to employ<br \/>\n         the personnel of the other after such personnel have separated or been<br \/>\n         separated from the service of the other.<\/p>\n<p>                                       47<\/p>\n<p>   56<\/p>\n<p>                                   SECTION 12<\/p>\n<p>                                     TAXES<\/p>\n<p>12.1     APPORTIONMENT OF AD VALOREM AND PROPERTY TAXES: All ad valorem taxes,<br \/>\n         real property taxes, personal property taxes and similar obligations<br \/>\n         shall be apportioned as of the Effective Date between Buyer and<br \/>\n         Unocal. All such taxes allocable to the periods before the Effective<br \/>\n         Date shall be paid by Unocal, and all such taxes allocable to periods<br \/>\n         after the Effective Date shall be paid by Buyer. Any refunds of taxes<br \/>\n         allocable to periods prior to the Effective Date shall be the property<br \/>\n         of Unocal. Any refunds of taxes allocable to periods after the<br \/>\n         Effective Date shall be the property of Buyer. Buyer shall file or<br \/>\n         cause to be filed all required reports and returns incident to such<br \/>\n         taxes which are due on or after the Closing Date and shall pay or<br \/>\n         cause to be paid to the taxing authorities all such taxes reflected on<br \/>\n         such reports and returns, subject to reimbursement by Unocal to Buyer<br \/>\n         for Unocal&#8217;s portion of such taxes, if any.<\/p>\n<p>12.2     SALES TAXES, FILING FEES, ETC.: The Purchase Price provided for<br \/>\n         hereunder is net of any sales taxes or other transfer taxes. Buyer<br \/>\n         shall be liable for any sales tax or other transfer tax as well as any<br \/>\n         applicable conveyance, transfer and recording fees, and real estate<br \/>\n         transfer stamp or taxes imposed upon the sale of Assets and the<br \/>\n         transfer of Shares pursuant to this Agreement, and Buyer shall defend<br \/>\n         any action by a governmental agency to collect such taxes or fees, and<br \/>\n         will hold Unocal harmless from any cost or liability for taxes, fees,<br \/>\n         penalty, interest or costs, including reasonable attorney&#8217;s fees,<br \/>\n         assessed as a result of this transaction.<\/p>\n<p>12.3     OTHER TAXES: All production, severance or excise taxes, conservation<br \/>\n         fees and other similar such taxes or fees relating to oil and gas<br \/>\n         produced and sold from the Assets prior to the Effective Date shall be<br \/>\n         paid by Unocal, and all such taxes and fees relating to such oil and<br \/>\n         gas produced and sold after the Effective Date shall be paid or<br \/>\n         reimbursed by Buyer (or if attributable to periods after the Effective<br \/>\n         Date and Unocal pays such taxes, then Buyer shall reimburse Unocal<br \/>\n         therefore). Any rebates, refunds or similar credits attributable to<br \/>\n         such taxes and fees for periods prior to the Effective Date shall be,<br \/>\n         and remain, the property of Unocal (and Buyer is hereby notified that<br \/>\n         Unocal is seeking certain rebates, refunds or similar credits from the<br \/>\n         applicable taxing authorities). In the event such taxes attributable<br \/>\n         to the Assets are not assessed on a current year basis, it is agreed<br \/>\n         that when such taxes are assessed, insofar as they Accrued to the<br \/>\n         Assets before the Effective Date, they shall be paid by Unocal upon<br \/>\n         receipt of a statement and supporting documentation.<\/p>\n<p>                                       48<\/p>\n<p>   57<\/p>\n<p>                                   SECTION 13<\/p>\n<p>                                  TERMINATION<\/p>\n<p>13.1     TERMINATION: This Agreement and the transactions contemplated herein<br \/>\n         may be terminated at any time prior to Closing:<\/p>\n<p>         (i)      by mutual consent of the Parties;<\/p>\n<p>         (ii)     by Buyer pursuant to Section 3.7;<\/p>\n<p>         (iii)    by Buyer, if preferential purchase rights for the Lisbon<br \/>\n                  Units or the Lisbon Plant are exercised prior to the Closing;<\/p>\n<p>         (iv)     by either Party, without impairing any other rights<br \/>\n                  hereunder, if there has been a material breach of covenant or<br \/>\n                  agreement contained in this Agreement on the part of the<br \/>\n                  other Party, or a failure of a condition and such breach of a<br \/>\n                  covenant or agreement or failure of a condition has not been<br \/>\n                  promptly cured;<\/p>\n<p>         (v)      by either Party, upon written notice to the other Party,<br \/>\n                  pursuant to Section 4.9; or<\/p>\n<p>         (vi)     by Buyer, pursuant to Section 9.12 or by Unocal, pursuant to<br \/>\n                  Section 8.13.<\/p>\n<p>13.2     EFFECT OF TERMINATION: In the event of termination of this Agreement<br \/>\n         pursuant to Section 13.1(i) or 13.1(v) above, this Agreement shall<br \/>\n         forthwith become void and there shall be no liability or obligation on<br \/>\n         the part of either Party or their respective officers or directors or<br \/>\n         shareholders except as otherwise set forth herein.<\/p>\n<p>13.3     SPECIFIC PERFORMANCE: If Closing does not occur as contemplated herein<br \/>\n         by reason of Unocal&#8217;s determination that Buyer has breached this<br \/>\n         Agreement or failed to satisfy a condition, Buyer may contest Unocal&#8217;s<br \/>\n         termination of this Agreement and seek specific performance of the<br \/>\n         Agreement, provided it notifies Unocal in writing of its election to<br \/>\n         seek specific performance within ten (10) days of Unocal&#8217;s notice of<br \/>\n         termination under Section 13.1(iv). The losing Party shall pay the<br \/>\n         prevailing Party&#8217;s costs and reasonable attorney&#8217;s fees together with<br \/>\n         any actual damages suffered or incurred.<\/p>\n<p>                                   SECTION 14<\/p>\n<p>                          SURVIVAL AND INDEMNIFICATION<\/p>\n<p>14.1     SURVIVAL: Notwithstanding any investigation conducted by any Party<br \/>\n         hereto and any information which any Party may receive, a claim for a<br \/>\n         breach of any of the representations, warranties or covenants<br \/>\n         contained in this Agreement, or in any Exhibit, certificate, document<br \/>\n         or statement delivered pursuant hereto, or pursuant to any<br \/>\n         indemnification, or of any third party claims under Section 14.3 (i)<br \/>\n         must be made within one (1) year following Closing;<\/p>\n<p>                                       49<\/p>\n<p>   58<\/p>\n<p>         provided, however, that nothing in this Section shall be construed to<br \/>\n         limit the time for making a claim by Unocal against, or for seeking<br \/>\n         indemnification from, Buyer with regard to Assumed Liabilities.<\/p>\n<p>14.2     INDEMNIFICATION:<\/p>\n<p>         (i)      (a) Except as otherwise set forth herein and except for<br \/>\n                  Assumed Liabilities of Buyer, Unocal shall indemnify and<br \/>\n                  hold harmless Buyer, and its successors and assigns,<br \/>\n                  against, and in respect of, any and all damages, claims,<br \/>\n                  losses, liabilities and expenses, including, without<br \/>\n                  limitation, reasonable legal, accounting and other<br \/>\n                  expenses, which may arise out of: (i) any breach or<br \/>\n                  violation of the covenants contained in this Agreement by<br \/>\n                  Unocal; (ii) any breach of any of the representations and<br \/>\n                  warranties made in this Agreement by Unocal; (iii)<br \/>\n                  liabilities expressly retained by Unocal in this Agreement;<br \/>\n                  or (iv) any act or omission by Unocal involving or relating<br \/>\n                  to or any liability arising from the Excluded Assets<br \/>\n                  whether occurring before or after the Effective Date;<\/p>\n<p>                  (b) NOTWITHSTANDING ANYTHING STATED HEREIN TO THE CONTRARY,<br \/>\n                  UNOCAL&#8217;S AGGREGATE LIABILITY AND OBLIGATION UNDER THIS<br \/>\n                  AGREEMENT FOR ENVIRONMENTAL LIABILITIES AND REMEDIATION COSTS<br \/>\n                  (INCLUDING, BUT NOT LIMITED TO, UNDER THIS SECTION), SHALL<br \/>\n                  NOT EXCEED (AND BUYER RELEASES UNOCAL FROM ALL LIABILITY IN<br \/>\n                  EXCESS OF) THE MAXIMUM AMOUNT OF LIABILITY OF UNOCAL<br \/>\n                  SPECIFIED IN SECTION 4.7 HEREOF, REGARDLESS OF THE SOLE,<br \/>\n                  JOINT OR CONCURRENT NEGLIGENCE, STRICT LIABILITY, BREACH OF<br \/>\n                  CONTRACT OR OTHER FAULT OR RESPONSIBILITY OF UNOCAL OR ANY<br \/>\n                  OTHER PERSON OR PARTY.<\/p>\n<p>                  (c) UNOCAL&#8217;S LIABILITY FOR INDEMNIFICATION UNDER<br \/>\n                  SECTIONS 14.2(i)(a)(i) AND 14.2(i)(a)(ii), EXCEPT WITH<br \/>\n                  RESPECT TO ENVIRONMENTAL LIABILITIES AND REMEDIATION COSTS<br \/>\n                  WHICH ARE ADDRESSED IN AND COVERED SOLELY BY SECTION 4.7,<br \/>\n                  SHALL NOT EXCEED $10,000,000 IN THE AGGREGATE REGARDLESS OF<br \/>\n                  THE SOLE, JOINT OR CONCURRENT NEGLIGENCE, STRICT LIABILITY,<br \/>\n                  BREACH OF CONTRACT OR OTHER FAULT OR RESPONSIBILITY OF UNOCAL<br \/>\n                  OR ANY OTHER PERSON.<\/p>\n<p>         (ii)     Buyer shall indemnify and hold harmless Unocal, its<br \/>\n                  Affiliates, and its and their successors and assigns,<br \/>\n                  against, and in respect of, any and all damages, claims,<br \/>\n                  losses, liabilities and expenses, including, without<br \/>\n                  limitation, reasonable legal,<\/p>\n<p>                                       50<\/p>\n<p>   59<\/p>\n<p>                  accounting and other expenses, which may arise out of: (i)<br \/>\n                  any breach or violation of the covenants in this Agreement by<br \/>\n                  Buyer; (ii) any breach of any of the representations and<br \/>\n                  warranties made in this Agreement by Buyer; or (iii) Assumed<br \/>\n                  Liabilities of Buyer, REGARDLESS OF WHETHER SUCH ASSUMED<br \/>\n                  LIABILITIES ARE KNOWN OR UNKNOWN, WHETHER SUCH ASSUMED<br \/>\n                  LIABILITIES ARE ARISING FROM OR ATTRIBUTABLE TO ACTIONS,<br \/>\n                  EVENTS OR CONDITIONS EXISTING OR OCCURRING PRIOR TO OR AFTER<br \/>\n                  THE EFFECTIVE DATE (SUBJECT TO EXCEPTIONS SET FORTH HEREIN)<br \/>\n                  AND REGARDLESS OF WHETHER SUCH ASSUMED LIABILITIES ARE<br \/>\n                  ARISING FROM OR RELATING TO THE SOLE, JOINT OR CONCURRENT<br \/>\n                  NEGLIGENCE, STRICT LIABILITY, PREMISES LIABILITY, BREACH OF<br \/>\n                  CONTRACT OR OTHER FAULT OR RESPONSIBILITY OF UNOCAL OR ANY<br \/>\n                  OTHER PERSON, AND REGARDLESS OF WHETHER SUCH ASSUMED<br \/>\n                  LIABILITIES ARE ARISING FROM ANY THEORY OF LAW (INCLUDING,<br \/>\n                  BUT NOT LIMITED TO, THEORIES RELATING TO OR ARISING FROM<br \/>\n                  ENVIRONMENTAL LIABILITY, PLUGGING AND ABANDONMENT LIABILITY,<br \/>\n                  TORT, CONTRACT, STATUTORY, REGULATORY, STRICT LIABILITY,<br \/>\n                  COMMON LAW, OR ANY OTHER THEORY OF LIABILITY.<\/p>\n<p>14.3     THIRD PARTY CLAIMS:<\/p>\n<p>         (i)      Except as otherwise set forth herein and except for Assumed<br \/>\n                  Liabilities of Buyer, Unocal shall indemnify and hold Buyer<br \/>\n                  and its successors and assigns harmless against any and all<br \/>\n                  damages, claims, losses, liabilities and expenses, including,<br \/>\n                  without limitation, reasonable legal, accounting and other<br \/>\n                  expenses, arising out of any third party claim, legal suit or<br \/>\n                  proceeding against Buyer, which claim, legal suit or<br \/>\n                  proceeding arises from the conduct of the business of Unocal<br \/>\n                  or the ownership of the properties owned or leased by Unocal<br \/>\n                  prior to the Closing Date.<\/p>\n<p>         (ii)     Buyer shall indemnify and hold Unocal and its successors and<br \/>\n                  assigns harmless against any and all damages, claims, losses,<br \/>\n                  liabilities and expenses, including, without limitation,<br \/>\n                  reasonable legal, accounting and other expenses, arising out<br \/>\n                  of any third party legal suit or proceeding against Unocal,<br \/>\n                  which legal suit or proceeding arises out of Assumed<br \/>\n                  Liabilities, or from the conduct of the business of Buyer or<br \/>\n                  the ownership of the properties owned or leased by Buyer<br \/>\n                  after the Closing Date.<\/p>\n<p>14.4     METHOD OF ASSERTING CLAIMS: The Party making a claim under this<br \/>\n         Section, or any other indemnity provision herein, is hereinafter<br \/>\n         referred to as the &#8220;Indemnified Party&#8221; and the Party against whom such<br \/>\n         claims are asserted is hereinafter referred to as the &#8220;Indemnifying<br \/>\n         Party.&#8221; All claims by an Indemnified Party shall be asserted and<br \/>\n         resolved as follows:<\/p>\n<p>                                       51<\/p>\n<p>   60<\/p>\n<p>         (i)      If any claim or demand for which an Indemnifying Party would<br \/>\n                  be liable to an Indemnified Party hereunder is asserted<br \/>\n                  against or sought to be collected from such Indemnified<br \/>\n                  Party by a third party, such Indemnified Party shall as<br \/>\n                  promptly as is practicable after its receipt of such claim<br \/>\n                  or demand, deliver a Claim Notice to the Indemnifying<br \/>\n                  Party; provided, however, that any failure to give such<br \/>\n                  notice will not waive any rights of the Indemnified Party<br \/>\n                  except to the extent that either the rights of the<br \/>\n                  Indemnifying Party are actually prejudiced or such notice<br \/>\n                  is not given within the applicable time periods set forth<br \/>\n                  in this Agreement.<\/p>\n<p>                  The Indemnifying Party may, and upon request of the<br \/>\n                  Indemnified Party shall, retain counsel of its choice to<br \/>\n                  represent the Indemnified Party and any others the<br \/>\n                  Indemnifying Party may reasonably designate in connection<br \/>\n                  with such claim or demand and shall pay the fees and<br \/>\n                  disbursements of such counsel with regard thereto; provided,<br \/>\n                  however, that any Indemnified Party is hereby authorized<br \/>\n                  prior to the date on which it receives written notice from<br \/>\n                  the Indemnifying Party designating such counsel to retain<br \/>\n                  counsel whose reasonable fees and expenses shall be at the<br \/>\n                  expense of the Indemnifying Party to file any action, answer<br \/>\n                  or other pleading and take such other action which it shall<br \/>\n                  reasonably deem necessary to protect its interests or those<br \/>\n                  of the Indemnifying Party until the date on which the<br \/>\n                  Indemnified Party receives such notice from the Indemnifying<br \/>\n                  Party.<\/p>\n<p>                  In the event that the Indemnifying Party shall retain such<br \/>\n                  counsel, the Indemnified Party shall have the right to retain<br \/>\n                  its own counsel but the fees and expenses of such counsel<br \/>\n                  shall be at the expense of the Indemnified Party unless:<\/p>\n<p>                  (a)      the Indemnifying Party and the Indemnified Party<br \/>\n                           shall have mutually agreed to the retention of such<br \/>\n                           counsel; or<\/p>\n<p>                  (b)      the named parties to any such proceeding (including,<br \/>\n                           but not limited to, any impleaded parties) include<br \/>\n                           both the Indemnifying Party and the Indemnified<br \/>\n                           Party and representation of both Parties by the same<br \/>\n                           counsel would involve such counsel in an actual or<br \/>\n                           potential conflict of interest in violation of<br \/>\n                           applicable principles of professional ethics.<\/p>\n<p>         (ii)     If requested by the Indemnifying Party, the Indemnified Party<br \/>\n                  agrees to cooperate with the Indemnifying Party and its<br \/>\n                  counsel in contesting any claim or demand that the<br \/>\n                  Indemnifying Party defends, or, if appropriate and related to<br \/>\n                  the claim in question, in making any counterclaim against the<br \/>\n                  Person asserting the third party claim or demand, or any<br \/>\n                  cross-complaint against any Person. If the Indemnifying Party<br \/>\n                  has accepted responsibility in writing, no claim or demand<br \/>\n                  that would result in an Indemnifying Party being liable<br \/>\n                  hereunder may be settled without the consent of<\/p>\n<p>                                       52<\/p>\n<p>   61<\/p>\n<p>                  the Indemnifying Party which consent shall not be<br \/>\n                  unreasonably withheld. Unless the Indemnifying Party shall<br \/>\n                  have agreed in writing that any and all damages to the<br \/>\n                  Indemnified Party related to a claim or demand are fully<br \/>\n                  covered by the indemnities provided herein, no such claim or<br \/>\n                  demand may be settled without the consent of the Indemnified<br \/>\n                  Party, which consent will not be unreasonably withheld.<br \/>\n                  Except with respect to settlements entered into without the<br \/>\n                  Indemnified Party&#8217;s consent pursuant to the immediately<br \/>\n                  preceding sentence, to the extent it shall be determined that<br \/>\n                  the Indemnified Party shall have no right pursuant to this<br \/>\n                  Section to be indemnified by the Indemnifying Party, the<br \/>\n                  Indemnified Party shall promptly pay to the Indemnifying<br \/>\n                  Party:<\/p>\n<p>                  (a)      any amounts previously paid or advanced by the<br \/>\n                           Indemnifying Party to the Indemnified Party with<br \/>\n                           respect to such matters pursuant to this Section;<br \/>\n                           plus<\/p>\n<p>                  (b)      interest thereon until paid by the Indemnified Party<br \/>\n                           at the Interest Rate for the period commencing on<br \/>\n                           the date on which such amount was paid or advanced<br \/>\n                           and ending sixty (60) days after the date on which<br \/>\n                           such amount was paid or advanced and ending sixty<br \/>\n                           (60) days after the date on which it was finally<br \/>\n                           determined that the Indemnified Party had no such<br \/>\n                           right to be indemnified.<\/p>\n<p>         (iii)   In the event the Indemnified Party should have a claim against<br \/>\n                 the Indemnifying Party hereunder which does not involve a claim<br \/>\n                 or demand being asserted against or sought to be collected from<br \/>\n                 it by a third party, the Indemnified Party shall as promptly as<br \/>\n                 is practical send a Claim Notice with respect to such claim to<br \/>\n                 the Indemnifying Party; provided, however, that any failure to<br \/>\n                 give such notice will not waive any rights of the Indemnified<br \/>\n                 Party except to the extent that either the rights of the<br \/>\n                 Indemnifying Party are actually prejudiced or such notice is<br \/>\n                 not given within the applicable time periods set forth in this<br \/>\n                 Agreement. If the Indemnifying Party notifies in writing the<br \/>\n                 Indemnified Party that it does not dispute such claim, the<br \/>\n                 amount of such claim shall be conclusively deemed a liability<br \/>\n                 of the Indemnifying Party hereunder and shall be paid to the<br \/>\n                 Indemnified Party immediately. If the Indemnifying Party<br \/>\n                 disputes such claim, such dispute shall be resolved by good<br \/>\n                 faith negotiations between the Parties.<\/p>\n<p>         (iv)     From and after the delivery of a Claim Notice hereunder, at<br \/>\n                  the reasonable request of the Indemnifying Party, the<br \/>\n                  Indemnified Party shall grant the Indemnifying Party and its<br \/>\n                  representatives full and complete access to the books,<br \/>\n                  records and properties of the Indemnified Party to the extent<br \/>\n                  reasonably related to the matters with which the Claim Notice<br \/>\n                  is concerned. The Indemnifying Party will not, and shall<br \/>\n                  require that its representatives do not, use (except in<br \/>\n                  connection with such Claim Notice) or disclose to any third<br \/>\n                  Person other than the Indemnifying Party&#8217;s representatives<\/p>\n<p>                                       53<\/p>\n<p>   62<\/p>\n<p>                  (except as may be required by law) any information obtained<br \/>\n                  that is designated as confidential by the Indemnified Party,<br \/>\n                  unless such information is:<\/p>\n<p>                  (a)      generally available to the public other than as the<br \/>\n                           result of a wrongful act or omission by the<br \/>\n                           Indemnifying Party;<\/p>\n<p>                  (b)      already within the knowledge of the Indemnifying<br \/>\n                           Party;<\/p>\n<p>                  (c)      available to the Indemnifying Party through other<br \/>\n                           Sections herein, or<\/p>\n<p>                  (d)      provided to the Indemnifying Party in writing by a<br \/>\n                           third party who is under no obligation to the<br \/>\n                           Indemnified Party to protect the confidentiality<br \/>\n                           thereof.<\/p>\n<p>         All such access shall be granted during normal business hours, shall<br \/>\n         be subject to the normal safety regulations of the Indemnified Party,<br \/>\n         and shall be granted under conditions that will not interfere with the<br \/>\n         business and operations of the Indemnified Party. Nothing contained in<br \/>\n         this Section shall be construed to expand or reduce the rights or<br \/>\n         obligations of the Indemnifying Party with respect to any information<br \/>\n         previously provided to the Indemnifying Party pursuant to any other<br \/>\n         confidentiality agreement.<\/p>\n<p>14.5     RIGHT TO CURE: Any Party that is obligated to indemnify, defend and\/or<br \/>\n         hold harmless any other Party pursuant to any provision of this<br \/>\n         Agreement shall have the right to cure, within a reasonable time and<br \/>\n         in a manner reasonably satisfactory to such Indemnified Party, any<br \/>\n         matter giving rise to such obligation; provided, however, that any<br \/>\n         such cure shall not relieve or reduce any such obligation to the<br \/>\n         extent that such cure is inadequate. The Indemnified Party may, if<br \/>\n         there is no attempt to cure or if the cure is inadequate, expend<br \/>\n         reasonable sums to cure, which sums shall be reimbursed together with<br \/>\n         interest at the prime rate of the Chase Manhattan Bank.<\/p>\n<p>14.6     EXCLUSIVE REMEDY: The indemnification rights under this Section 14<br \/>\n         shall be the exclusive rights and remedies of a party hereto<br \/>\n         respecting claims against the other parties hereto arising under,<br \/>\n         pursuant to or in connection with this Agreement.<\/p>\n<p>14.7     RELEASE, INDEMNITY AND WAIVER: EXCEPT FOR THE EXPRESS PROVISIONS<br \/>\n         PROVIDED ELSEWHERE IN THIS AGREEMENT,  BUYER WAIVES ANY RIGHT TO<br \/>\n         RECOVER FROM UNOCAL AND ITS AFFILIATES AND FOREVER RELEASES AND<br \/>\n         DISCHARGES UNOCAL AND ITS AFFILIATES AND SUBJECT TO, AND AS<br \/>\n         PROVIDED IN, THIS AGREEMENT, AGREES TO RELEASE, INDEMNIFY, DEFEND<br \/>\n         AND HOLD UNOCAL AND ITS AFFILIATES HARMLESS FROM ANY AND ALL<br \/>\n         DAMAGES, CLAIMS, LOSSES, LIABILITIES, PENALTIES, FINES, LIENS,<br \/>\n         JUDGMENTS, COSTS AND EXPENSES WHATSOEVER, (INCLUDING, WITHOUT<\/p>\n<p>                                       54<\/p>\n<p>   63<\/p>\n<p>         LIMITATION, ATTORNEYS&#8217; FEES AND COSTS), WHETHER DIRECT OR INDIRECT,<br \/>\n         KNOWN OR UNKNOWN, FORESEEN OR UNFORESEEN, THAT MAY ARISE ON ACCOUNT OF<br \/>\n         OR IN ANY WAY BE CONNECTED WITH THE PHYSICAL CONDITION OF THE ASSETS<br \/>\n         AT THE EFFECTIVE DATE OR ANY LAW OR REGULATION APPLICABLE THEREOF,<br \/>\n         INCLUDING, WITHOUT LIMITATION, THE COMPREHENSIVE ENVIRONMENTAL<br \/>\n         RESPONSE, COMPENSATION AND LIABILITY ACT OF 1980, AS AMENDED (42<br \/>\n         U.S.C. SECTION 9601 ET. SEQ.), THE RESOURCE CONSERVATION AND RECOVERY<br \/>\n         ACT OF 1976 (42 U.S.C. SECTION 6901 ET. SEQ.), OR ANY OTHER APPLICABLE<br \/>\n         FEDERAL, STATE OR LOCAL LAW, WHETHER OR NOT ARISING DURING THE PERIOD<br \/>\n         OF, OR FROM, OR IN CONNECTION WITH UNOCAL&#8217;S OWNERSHIP OF THE ASSETS AT<br \/>\n         OR PRIOR TO THE EFFECTIVE DATE, AND WHETHER OR NOT ATTRIBUTABLE TO THE<br \/>\n         STRICT LIABILITY OF UNOCAL AND ITS AFFILIATES OR ANY OTHER PERSON OR<br \/>\n         TO THE SOLE, JOINT OR CONCURRENT, ACTIVE OR PASSIVE, NEGLIGENCE OF<br \/>\n         UNOCAL OR ITS AFFILIATES OR ANY OTHER PERSON, EVEN IF CAUSED BY THE<br \/>\n         GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF UNOCAL OR ITS AFFILIATES OR<br \/>\n         ANY OTHER PERSON PRIOR TO CLOSING.<\/p>\n<p>                                   SECTION 15<\/p>\n<p>                                    CLOSING<\/p>\n<p>15.1     TIME OF ESSENCE: Time is expressly declared to be of the essence under<br \/>\n         this Agreement.<\/p>\n<p>15.2     PLACE AND DATE: Closing shall occur at Andrews &amp; Kurth&#8217;s offices at<br \/>\n         600 Travis, Suite 4200, Houston, Texas 77002 on or before June 29,<br \/>\n         1999 (&#8220;Closing Date&#8221;), unless extended by agreement of the parties.<\/p>\n<p>15.3     UNOCAL&#8217;S ACTIONS AT CLOSING: At Closing, Unocal shall perform the<br \/>\n         following actions:<\/p>\n<p>         (i)      Unocal shall pay and deliver an amount equal to the Adjusted<br \/>\n                  Cash Purchase Price plus or minus the Cash Settlement, if any<br \/>\n                  (to the extent such amount is a negative number);<\/p>\n<p>         (ii)     Unocal shall deliver to Buyer herein-required opinions of<br \/>\n                  counsel<br \/>\n                  and certificates;<\/p>\n<p>         (iii)    Unocal shall execute and deliver to Buyer all required<br \/>\n                  instruments of conveyance and sale in sufficient counterparts<br \/>\n                  and on appropriate state, federal and Fee forms to allow<br \/>\n                  recording or filing, including a deed with respect to the fee<br \/>\n                  simple estate underlying the Lisbon Plant, a royalty<br \/>\n                  assignment in respect of existing third party leases in the<br \/>\n                  Parachute Creek Field, an Assignment of Contract Rights (in<br \/>\n                  such form<\/p>\n<p>                                       55<\/p>\n<p>   64<\/p>\n<p>                  to be mutually agreed by TBI and Unocal), including, without<br \/>\n                  limitation, the four joint operating agreements in the<br \/>\n                  Parachute Creek Field, an Assignment of Leases, Bill of Sale<br \/>\n                  and Assignment of Intangible Contractual Rights and other<br \/>\n                  Tangible Property in the form attached hereto as Exhibit<br \/>\n                  &#8220;F-1&#8221;, and Unocal shall cause its Affiliates to execute and<br \/>\n                  deliver similar conveyance instruments relating to the<br \/>\n                  Pipeline Assets and related facilities, in the form attached<br \/>\n                  hereto as Exhibit &#8220;F-2&#8221;;<\/p>\n<p>         (iv)     Unocal shall (subject to the terms of applicable operating<br \/>\n                  agreements and other provisions hereof) deliver to Buyer<br \/>\n                  exclusive possession of the Assets;<\/p>\n<p>                  Unocal shall, at or as promptly as reasonably possible and<br \/>\n                  within 20 days after Closing, provide Buyer, at Unocal&#8217;s cost<br \/>\n                  and expense, subject to the attorney-client privilege, the<br \/>\n                  following records relating to the Assets to the extent they<br \/>\n                  are in Unocal&#8217;s possession: lease files; unit files; lease<br \/>\n                  contract files; payout statements; division order files;<br \/>\n                  right-of-way files, well files; all non-interpretative<br \/>\n                  geologic information; and digital data files, if any existing<br \/>\n                  as of the date hereof, but specifically excluding any<br \/>\n                  information or data that Unocal is restricted from<br \/>\n                  disclosing, information which is trade secret or proprietary<br \/>\n                  to Unocal and is not part of the Assets and all other<br \/>\n                  records, including, but not limited to, corporate records,<br \/>\n                  computer programs and general tax records. Unocal shall also<br \/>\n                  provide copies of all seismic data covering the Assets<br \/>\n                  described in Exhibit &#8220;E-2&#8221;, subject to Buyer&#8217;s execution of a<br \/>\n                  Geophysical Data Licensing Agreement in the form of Exhibit<br \/>\n                  &#8220;E-1&#8221; covering such seismic data, that Unocal is not<br \/>\n                  contractually or otherwise legally restricted from<br \/>\n                  disclosing. As to any seismic data Unocal is contractually or<br \/>\n                  otherwise legally restricted from disclosing, Buyer may<br \/>\n                  prepare and provide Unocal with documents requesting waivers<br \/>\n                  of the applicable restrictions, and Unocal shall forward such<br \/>\n                  requests as well as provide Buyer such other assistance in<br \/>\n                  obtaining waivers of the applicable restrictions as is<br \/>\n                  reasonable under the circumstances. Any data, documents or<br \/>\n                  information provided or made available hereunder or in<br \/>\n                  connection with the transactions contemplated herein is<br \/>\n                  provided WITHOUT ANY REPRESENTATION OR WARRANTY OF ANY KIND,<br \/>\n                  EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, AS TO THE<br \/>\n                  ACCURACY OR COMPLETENESS OF THE INFORMATION CONTAINED<br \/>\n                  THEREIN, and shall be at Buyer&#8217;s sole risk and expense. Any<br \/>\n                  other provision of this Agreement to the contrary<br \/>\n                  notwithstanding, Unocal shall not provide Buyer with copies<br \/>\n                  of any records or data or access to any records or data which<br \/>\n                  Unocal cannot legally provide to Buyer because of third party<br \/>\n                  restrictions on Unocal;<\/p>\n<p>         (v)      Unocal shall deliver to Buyer a certificate of a corporate<br \/>\n                  officer to the effect that, as of the Closing Date, it is not<br \/>\n                  a foreign person as defined in the Internal Revenue Code of<br \/>\n                  1986, as amended, and Income Tax Regulations, such<br \/>\n                  certificate to be<\/p>\n<p>                                       56<\/p>\n<p>   65<\/p>\n<p>                  substantially in the form described in Treasury Regulation<br \/>\n                  Section 1.1445-2(b)(2)(iii)(B) or otherwise within the<br \/>\n                  requirements of Section 1.1445-2(b)(2) of that regulation;<\/p>\n<p>         (vi)     Unocal shall deliver to Buyer an executed Stock Ownership and<br \/>\n                  Registration Rights Agreement;<\/p>\n<p>         (vii)    Unocal shall deliver to Buyer the executed Lease Agreement;<\/p>\n<p>         (viii)   Unocal shall deliver to Buyer, as applicable, letters-in-lieu<br \/>\n                  of division orders or transfer orders as are reasonably<br \/>\n                  necessary in connection with the transaction; and<\/p>\n<p>         (ix)     Unocal shall deliver to Buyer, as applicable, change of<br \/>\n                  operator (as to Unocal operated assets for which Buyer is<br \/>\n                  expected to assume operations) and well transfer forms as are<br \/>\n                  reasonably necessary in connection with the transaction.<\/p>\n<p>15.4     BUYER&#8217;S ACTIONS AT CLOSING: At Closing, Buyer shall perform the<br \/>\n         following actions:<\/p>\n<p>         (i)      Buyer shall execute and deliver to Unocal an Assumption<br \/>\n                  Agreement in the form attached hereto as Exhibit &#8220;G&#8221;;<\/p>\n<p>         (ii)     Buyer shall pay and deliver a cash amount equal to the<br \/>\n                  Adjusted Cash Purchase Price plus or minus the Cash<br \/>\n                  Settlement, if any (to the extent same is a positive number);<\/p>\n<p>         (iii)    Buyer shall deliver a stock certificate representing the<br \/>\n                  Shares, in such form as is reasonably satisfactory to Unocal;<\/p>\n<p>         (iv)     Buyer shall execute and deliver to Unocal all herein required<br \/>\n                  opinions of counsel and certificates; and<\/p>\n<p>         (v)      Buyer shall deliver to Unocal an executed Stock Ownership and<br \/>\n                  Registration Rights Agreement.<\/p>\n<p>15.5     CLOSING STATEMENT: Unocal and Buyer shall execute a joint closing<br \/>\n         statement acknowledging the payment of the Adjusted Cash Purchase<br \/>\n         Price, the Cash Settlement, the transfer of the Assets and the<br \/>\n         delivery of the Shares.<\/p>\n<p>15.6     NOTICES: Immediately after Closing, Buyer or Unocal, as appropriate,<br \/>\n         shall notify all operators, non-operators, oil or gas purchasers,<br \/>\n         government agencies and royalty owners that it has purchased the<br \/>\n         Assets.<\/p>\n<p>                                       57<\/p>\n<p>   66<\/p>\n<p>                                   SECTION 16<\/p>\n<p>                             ACTIONS AFTER CLOSING<\/p>\n<p>16.1     FINAL ACCOUNTING: Within 120 days after Closing Unocal shall provide<br \/>\n         Buyer with a statement of accounting (&#8220;Final Accounting&#8221;). On or<br \/>\n         before 60 days after receipt by Buyer of the Final Accounting, Buyer<br \/>\n         shall deliver to Unocal a written report containing any changes that<br \/>\n         Buyer proposes to make to such statement. On or before 30 days after<br \/>\n         receipt by Unocal of Buyer&#8217;s written report regarding the Final<br \/>\n         Accounting, Buyer and Unocal shall agree as to the form and substance<br \/>\n         of the Final Accounting. If Buyer and Unocal are unable to agree upon<br \/>\n         the Final Accounting within such additional thirty (30) days following<br \/>\n         completion of Buyer&#8217;s review of the Final Accounting described above,<br \/>\n         then the Parties jointly shall select, within such thirty (30) day<br \/>\n         period, an independent accounting firm of national reputation which<br \/>\n         shall determine the final accounting as soon as reasonably possible<br \/>\n         but in no event later than 30 days after the matter has been jointly<br \/>\n         submitted. The determination by such independent accounting firm shall<br \/>\n         be conclusive. The expense of such independent accounting firm shall<br \/>\n         be borne one-half by Unocal and one-half by Buyer.<\/p>\n<p>16.2     RECEIPTS AND CREDITS: All monies, proceeds, receipts, credits and<br \/>\n         income attributable to the Assets for all periods of time subsequent<br \/>\n         to the Effective Date except as otherwise provided herein, shall be<br \/>\n         the sole property and entitlement of Buyer and, to the extent received<br \/>\n         by Unocal, Unocal shall fully disclose, account for and reflect the<br \/>\n         same to Buyer in the Final Accounting or otherwise transmit same to<br \/>\n         Buyer promptly after Closing. All monies, proceeds, receipts, credits<br \/>\n         and income attributable to the Assets for all periods of time prior to<br \/>\n         the Effective Date except as otherwise provided herein shall be the<br \/>\n         sole property and entitlement of Unocal and, to the extent received by<br \/>\n         Buyer, Buyer shall fully disclose, account for and transmit same to<br \/>\n         Unocal promptly. All costs, expenses and disbursements attributable to<br \/>\n         the Assets for periods of time prior to the Effective Date except as<br \/>\n         otherwise provided herein, regardless of when due or payable, shall be<br \/>\n         the sole obligation of Unocal and Unocal shall promptly pay, or if<br \/>\n         paid by Buyer, promptly reimburse Buyer for and hold Buyer harmless<br \/>\n         from and against same. All costs, expenses and disbursements<br \/>\n         attributable to the Assets for periods of time subsequent to the<br \/>\n         Effective Date except as otherwise provided herein, regardless of when<br \/>\n         due or payable, shall be the sole obligation of Buyer and Buyer shall<br \/>\n         promptly pay, or if paid by Unocal, promptly reimburse Unocal for and<br \/>\n         hold Unocal harmless from and against same. Unocal shall be entitled<br \/>\n         to a credit for and reimbursement in an amount equal to any amount<br \/>\n         received by Buyer after Closing for any delivery or performance by<br \/>\n         Unocal prior to the Effective Date, and Buyer shall be entitled to a<br \/>\n         credit for and reimbursement in an amount equal to any amount received<br \/>\n         by Unocal after Closing for any delivery or performance by Buyer after<br \/>\n         the Effective Date.<\/p>\n<p>                                       58<\/p>\n<p>   67<\/p>\n<p>16.3     SUSPENDED FUNDS: As soon as practicable after the Closing, Unocal will<br \/>\n         provide to Buyer a listing showing all proceeds from production<br \/>\n         attributable to the Leasehold Interests which are currently held in<br \/>\n         suspense and shall transfer to Buyer all of those suspended proceeds.<br \/>\n         Upon request by Buyer, Unocal shall also provide Buyer with copies of<br \/>\n         documents and other historical information with respect to such<br \/>\n         proceeds. Upon receipt of such proceeds, Buyer shall be responsible<br \/>\n         for proper distribution of all the suspended proceeds, to the extent<br \/>\n         turned over to it by Unocal, to the parties lawfully entitled to them,<br \/>\n         and hereby agrees to indemnify, defend and hold harmless Unocal from<br \/>\n         and against any and all claims, liabilities, losses, costs and<br \/>\n         expenses, arising out of or relating to those suspended proceeds to<br \/>\n         the extent turned over to it by Unocal; provided, however, that Unocal<br \/>\n         shall, for a period continuing through and until the second<br \/>\n         anniversary of the Closing, indemnify and hold Buyer harmless from and<br \/>\n         against any and all claims, liabilities, losses, costs and expenses<br \/>\n         associated with any claims against the suspended proceeds to the<br \/>\n         extent such claim exceeds the proceeds transferred to Buyer in respect<br \/>\n         of such claimant and arises solely from Unocal&#8217;s actions or omissions<br \/>\n         prior to the date Buyer receives such suspended proceeds.<\/p>\n<p>16.4     FURTHER ASSURANCES: After Closing, Unocal and Buyer agree to take such<br \/>\n         further actions and to execute, acknowledge and deliver all such<br \/>\n         further documents and instruments that are necessary or useful in<br \/>\n         carrying out the purposes of this Agreement or of any document<br \/>\n         delivered pursuant hereto.<\/p>\n<p>16.5     RECORDING: Buyer shall, at its own cost, immediately record all<br \/>\n         instruments of conveyance and sale in the appropriate office of the<br \/>\n         state and county in which the lands covered thereby are located. Buyer<br \/>\n         shall immediately file for and obtain the necessary approval of all<br \/>\n         federal, Indian tribal or state government agencies to the assignment<br \/>\n         of the Assets. The assignment of any state, federal or Indian tribal<br \/>\n         oil and gas leases shall be filed in the appropriate governmental<br \/>\n         offices on a form required and in compliance with the applicable rules<br \/>\n         of the applicable government agencies. Buyer shall supply Unocal, with<br \/>\n         a true and accurate photocopy of all the recorded and filed<br \/>\n         assignments within a reasonable period of time after their recording<br \/>\n         and filing.<\/p>\n<p>16.6     BOOKS AND RECORDS: Notwithstanding any other provision herein<br \/>\n         contained, Buyer shall retain all original documents, if any,<br \/>\n         delivered to Buyer hereunder which pertain to the Assets for as long<br \/>\n         as it so desires and make the same available after the Closing for<br \/>\n         inspection and copying by Unocal during normal business hours, upon<br \/>\n         reasonable request and upon reasonable notice; provided, however, that<br \/>\n         during the first ten (10) years after Closing, such books, records or<br \/>\n         documents shall not be disposed of or destroyed by Buyer without first<br \/>\n         advising Unocal in writing and giving Unocal reasonable opportunity to<br \/>\n         obtain possession thereof.<\/p>\n<p>                                       59<\/p>\n<p>   68<\/p>\n<p>16.7     POST CLOSING ACCESS TO PROPERTIES AND RECORDS BY UNOCAL: From and<br \/>\n         after the Closing Date, Buyer will afford to Unocal and its authorized<br \/>\n         representatives reasonable access, during normal business hours, to<br \/>\n         the transferred employees, as shall at such time be employees of Buyer<br \/>\n         and who were prior to the Closing Date associated with the Assets, and<br \/>\n         to such properties, books and records relating to the Assets<br \/>\n         transferred to Buyer hereunder, and will furnish to Unocal such<br \/>\n         additional information, and will cooperate with Unocal in such other<br \/>\n         respects, including the making available to Unocal, unless the action<br \/>\n         is an action by Unocal against Buyer, as a witness or deponent such<br \/>\n         former employees of Unocal as shall be at the time employees of Buyer,<br \/>\n         as Unocal may request for financial reporting, tax or similar<br \/>\n         purposes, purposes of investigating claims, or conducting litigation<br \/>\n         or administrative proceedings with third parties or government<br \/>\n         agencies. Buyer will also provide to Unocal&#8217;s authorized<br \/>\n         representatives such reasonable access during normal business hours to<br \/>\n         the officers, employees, properties, books and records transferred to<br \/>\n         Buyer in connection with this Agreement. In addition, Buyer will<br \/>\n         provide access to Assets, and Buyer will cooperate with other<br \/>\n         reasonable requests of Unocal, in connection with any investigation<br \/>\n         of, or procurement of, insurance by Unocal relating to the Assets,<br \/>\n         including, without limitation, requests by Unocal (or its insurer) of<br \/>\n         financial, operational, environmental compliance and other information<br \/>\n         of or relating to Buyer. Buyer will be reimbursed by Unocal for any<br \/>\n         out-of-pocket costs (but not for the time of such employees or other<br \/>\n         overhead related charges) associated with providing Unocal such<br \/>\n         access.<\/p>\n<p>                                   SECTION 17<\/p>\n<p>                                 MISCELLANEOUS<\/p>\n<p>17.1     GOVERNING LAW:  THIS AGREEMENT SHALL BE GOVERNED BY AND INTERPRETED IN<br \/>\n         ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS (BUT AS TO THE ACTUAL<br \/>\n         CONVEYANCE OF REAL PROPERTY INTERESTS, THE LAWS OF THE STATE IN WHICH<br \/>\n         SUCH INTERESTS ARE LOCATED LAW SHALL GOVERN AND CONTROL), REGARDLESS OF<br \/>\n         CONFLICTS OF LAWS PROVISIONS. All assignments and instruments executed<br \/>\n         in accordance with this Agreement shall be governed by and interpreted<br \/>\n         in accordance with the laws of the state where the Assets conveyed<br \/>\n         thereby are located.<\/p>\n<p>17.2     ASSIGNMENT:<\/p>\n<p>         (i)      This Agreement and the rights and obligations hereunder shall<br \/>\n                  not be assignable by either Party hereto without the prior<br \/>\n                  written consent of the other; provided, however, that Unocal<br \/>\n                  and Buyer shall have the right without the other Party&#8217;s<br \/>\n                  consent to assign this Agreement, but not the right to assign<br \/>\n                  any duties or obligations hereunder, to an Affiliate(s) or a<br \/>\n                  subsidiary company.<\/p>\n<p>                                       60<\/p>\n<p>   69<\/p>\n<p>         (ii)     Any Party hereto may assign or delegate any of its rights,<br \/>\n                  benefits, duties or obligations hereunder: (i) to any<br \/>\n                  Person, if it has received the prior written consent of the<br \/>\n                  other Party; (ii) to its legal successor, if it merges<br \/>\n                  (whether or not it is the surviving corporation); or (iii)<br \/>\n                  to any Person to whom it has made any sale, lease, transfer<br \/>\n                  or other disposition of all or substantially all of its<br \/>\n                  assets; provided, however, that no Party may make an<br \/>\n                  assignment or delegation described in clauses (ii) and<br \/>\n                  (iii), above, unless such Party delivers to the other Party<br \/>\n                  hereto such written assumptions, affirmations and\/or legal<br \/>\n                  opinions as such other Party may reasonably request to<br \/>\n                  preserve their rights and remedies hereunder.<\/p>\n<p>         (iii)    In the event of an approved assignment, the rights, benefits,<br \/>\n                  duties and obligations of each Party hereto shall inure to<br \/>\n                  the benefit of, and be binding upon, each Party&#8217;s successors,<br \/>\n                  assigns or delegates.<\/p>\n<p>17.3     WRITTEN NOTICES: Any notices required to be given hereunder shall be<br \/>\n         in writing and transmitted by telex or telecopier, delivered by air<br \/>\n         courier, or deposited in the mail, postage prepaid and certified, and<br \/>\n         addressed as follows or as otherwise specified by Unocal and Buyer by<br \/>\n         notice hereunder:<\/p>\n<p>                  To Unocal:<\/p>\n<p>                  Union Oil Company of California<br \/>\n                  14141 Southwest Freeway<br \/>\n                  Sugar Land, Texas 77478<br \/>\n                  Fax No. (281) 287-5170<br \/>\n                  Attention: Manager, Business Development<\/p>\n<p>                  with a copy to:<\/p>\n<p>                  Union Oil Company of California<br \/>\n                  d.b.a. Spirit Energy 76<br \/>\n                  14141 Southwest Freeway<br \/>\n                  Sugar Land, Texas  77478<br \/>\n                  Fax No. (281) 287-7376<br \/>\n                  Attention: General Counsel<\/p>\n<p>                  To Buyer:<\/p>\n<p>                  Tom Brown, Inc.<br \/>\n                  508 West Wall, Suite 500<br \/>\n                  Midland, Texas  79702<\/p>\n<p>                                       61<\/p>\n<p>   70<\/p>\n<p>                  Fax No. (915) 682-9171<br \/>\n                  Attention:  Peter R. Scherer<\/p>\n<p>                  with a copy to:<\/p>\n<p>                  Tom Brown, Inc.<br \/>\n                  555 17th St., Suite 1850<br \/>\n                  Denver, Colorado 80202<br \/>\n                  Fax No. (303) 260-5001<br \/>\n                  Attention:  General Counsel<\/p>\n<p>                  Notices shall be effective upon receipt.<\/p>\n<p>17.4     EXPENSES: Each Party shall be solely responsible for all expenses<br \/>\n         incurred by it in connection with this transaction (including without<br \/>\n         limitation, fees and expenses of its own counsel and accountants).<\/p>\n<p>17.5     WAIVER OF COMPLIANCE WITH BULK TRANSFER LAWS: Buyer waives compliance<br \/>\n         with any applicable bulk transfer law relating to the transactions<br \/>\n         contemplated by this Agreement, and agrees to assume all risk and<br \/>\n         liability in connection with the failure to so comply.<\/p>\n<p>17.6     WAIVER OF CONSUMER RIGHTS: BUYER HEREBY WAIVES ITS RIGHTS UNDER THE<br \/>\n         DECEPTIVE TRADE PRACTICES &#8211; CONSUMER PROTECTION ACT, SECTION 17.41 ET<br \/>\n         SEQ., BUSINESS &amp; COMMERCE CODE, A LAW THAT GIVES CONSUMERS SPECIAL<br \/>\n         RIGHTS AND PROTECTIONS.  AFTER CONSULTATION WITH AN ATTORNEY OF ITS OWN<br \/>\n         SELECTION, BUYER VOLUNTARILY CONSENTS TO THIS WAIVER.  IN ADDITION, TO<br \/>\n         THE EXTENT APPLICABLE TO THE ASSETS OR ANY PORTION THEREOF, BUYER<br \/>\n         HEREBY WAIVES THE PROVISIONS OF THE TEXAS CONSUMER PROTECTION LAWS<br \/>\n         REGARDING FALSE, MISLEADING AND DECEPTIVE BUSINESS PRACTICES,<br \/>\n         UNCONSCIONABLE ACTIONS AND BREACHES OF WARRANTY; PROVIDED, HOWEVER,<br \/>\n         THAT NOTHING HEREIN CONTAINED SHALL BE DEEMED A WAIVER BY BUYER WHERE<br \/>\n         SUCH WAIVER IS PROHIBITED BY LAW.  IN ORDER TO EVIDENCE ITS ABILITY TO<br \/>\n         GRANT SUCH WAIVER, BUYER HEREBY REPRESENTS AND WARRANTS TO UNOCAL THAT<br \/>\n         BUYER (i) IS IN THE BUSINESS OF SEEKING OR ACQUIRING, BY PURCHASE OR<br \/>\n         LEASE, GOODS, OR SERVICES FOR COMMERCIAL OR BUSINESS USE, (ii) HAS<br \/>\n         ASSETS OF FIVE MILLION DOLLARS OR MORE ACCORDING TO IT MOST RECENT<br \/>\n         FINANCIAL STATEMENT PREPARED IN ACCORDANCE WITH GENERALLY ACCEPTED<br \/>\n         ACCOUNTING PRINCIPLES, (iii) HAS KNOWLEDGE AND EXPERIENCE IN FINANCIAL<br \/>\n         MATTERS THAT ENABLE IT TO EVALUATE THE MERITS AND RISKS<\/p>\n<p>                                       62<\/p>\n<p>   71<\/p>\n<p>         OF THE TRANSACTION CONTEMPLATED HEREBY, AND (iv) IS NOT IN A<br \/>\n         SIGNIFICANTLY DISPARATE BARGAINING POSITION. Nothing in this Section<br \/>\n         shall be interpreted as a waiver of the express representations and<br \/>\n         warranties in this Agreement.<\/p>\n<p>17.7     WAIVER OF JURY TRIAL: UNOCAL AND BUYER DO HEREBY IRREVOCABLY WAIVE, TO<br \/>\n         THE FULLEST EXTENT PERMITTED BY LAW, ANY AND ALL RIGHT TO A TRIAL BY<br \/>\n         JURY IN ANY ACTION, SUIT OR OTHER LEGAL PROCEEDING BASED UPON, ARISING<br \/>\n         OUT OF, OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED<br \/>\n         HEREBY.<\/p>\n<p>17.8     WAIVER OF PUNITIVE AND CONSEQUENTIAL DAMAGES: IN NO EVENT<br \/>\n         SHALL UNOCAL OR BUYER BE LIABLE TO THE OTHER PARTY HERETO FOR<br \/>\n         ANY LOST OR PROSPECTIVE PROFITS OR ANY OTHER SPECIAL, PUNITIVE,<br \/>\n         EXEMPLARY, CONSEQUENTIAL, INCIDENTAL OR INDIRECT LOSSES OR<br \/>\n         DAMAGES (IN TORT, CONTRACT OR OTHERWISE) UNDER OR IN RESPECT OF<br \/>\n         THIS AGREEMENT OR FOR ANY FAILURE OF PERFORMANCE RELATED<br \/>\n         HERETO HOWSOEVER CAUSED, WHETHER OR NOT ARISING FROM SUCH<br \/>\n         PARTY&#8217;S SOLE, JOINT OR CONCURRENT NEGLIGENCE.<\/p>\n<p>17.9     NO ADMISSIONS: Buyer and Unocal agree that neither this Agreement, nor<br \/>\n         any part hereof, nor any performance under this Agreement, nor any<br \/>\n         payment of any amount pursuant to any provision of this Agreement<br \/>\n         shall constitute or be construed as a finding, evidence of, or an<br \/>\n         admission or acknowledgment of any liability, fault, or past or<br \/>\n         present wrongdoing, or violation of any law, rule, regulation, or<br \/>\n         policy, by either Unocal or Buyer or by their respective officers,<br \/>\n         directors, employees, or agents.<\/p>\n<p>17.10    USE OF UNOCAL&#8217;S NAME: As soon as practicable after Closing, and in any<br \/>\n         event no later than 90 calendar days after Closing, Buyer shall remove<br \/>\n         or cause to be removed the names and marks used by Unocal and all<br \/>\n         variations and derivations thereof and logos relating thereto from the<br \/>\n         Assets and shall not make any use whatsoever of those names, marks and<br \/>\n         logos.<\/p>\n<p>17.11    ENTIRE AGREEMENT, ETC.: This Agreement, including the Exhibits<br \/>\n         referred to herein or delivered pursuant to this Agreement and the<br \/>\n         Confidentiality Agreement, which is incorporated herein by this<br \/>\n         reference as though fully set forth hereby, constitutes the entire<br \/>\n         agreement between Unocal and Buyer with respect to the subject matter<br \/>\n         hereof, and supersedes all prior oral or written agreements,<br \/>\n         commitments or understandings with respect thereto. No amendment of<br \/>\n         this Agreement shall be binding on the Parties unless in writing and<br \/>\n         signed by the authorized representatives of both Parties hereto. Any<br \/>\n         waiver of any breach of any term or condition of this Agreement shall<br \/>\n         not operate as a waiver of any other breach of such term or condition<br \/>\n         or of any other term or condition of this Agreement.<\/p>\n<p>                                       63<\/p>\n<p>   72<\/p>\n<p>17.12    PARTIES IN INTEREST: Nothing in this Agreement, whether express or<br \/>\n         implied, is intended to confer any rights or remedies under or by<br \/>\n         reason of this Agreement on any Persons other than the Parties to it<br \/>\n         and their permitted respective successors and assigns, nor is anything<br \/>\n         in this Agreement intended to relieve or discharge the obligation or<br \/>\n         liability of any third Persons to any Party to this Agreement, nor<br \/>\n         shall any provision give any third Persons any right of subrogation or<br \/>\n         action over and against any Party to this Agreement.<\/p>\n<p>17.13    SEVERABILITY: If any provision of this Agreement shall be held to be<br \/>\n         invalid or unenforceable under present or future law in whole or in<br \/>\n         part by any court of any jurisdiction, such provision shall, as to<br \/>\n         such jurisdiction, be ineffective to the extent of such invalidity or<br \/>\n         unenforceability without invalidating the remaining provisions of this<br \/>\n         Agreement or affecting the validity or enforceability of such<br \/>\n         provisions in any other jurisdiction.<\/p>\n<p>17.14    CONSENTS: When a consent is required of either Party hereto, such<br \/>\n         consent shall not be unreasonably withheld.<\/p>\n<p>                                       64<\/p>\n<p>   73<\/p>\n<p>         IN WITNESS WHEREOF, the Parties have executed this Agreement as of the<br \/>\ndate first above written.<\/p>\n<p>                                          UNION OIL COMPANY OF CALIFORNIA<\/p>\n<p>                                          By: \/s\/ ROBERT C. GNAGY<br \/>\n                                             &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-<br \/>\n                                          Name:   Robert C. Gnagy<br \/>\n                                               &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<br \/>\n                                          Title:  Attorney-In-Fact<br \/>\n                                                &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-<\/p>\n<p>                                          TOM BROWN, INC.<\/p>\n<p>                                          By: \/s\/ PETER R. SCHERER<br \/>\n                                             &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-<br \/>\n                                          Name:   Peter R. Scherer<br \/>\n                                               &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<br \/>\n                                          Title:  Executive Vice President<br \/>\n                                                &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-<\/p>\n<p>                                      65<\/p>\n","protected":false},"template":"","meta":{"_acf_changed":false,"_stopmodifiedupdate":true,"_modified_date":"","_cloudinary_featured_overwrite":false},"corporate_contracts_companies":[6962,9186],"corporate_contracts_industries":[9409],"corporate_contracts_types":[9623,9622],"class_list":["post-43539","corporate_contracts","type-corporate_contracts","status-publish","hentry","corporate_contracts_companies-brown-tom-inc","corporate_contracts_companies-unocal-corp","corporate_contracts_industries-energy__exploration","corporate_contracts_types-planning__asset","corporate_contracts_types-planning"],"acf":[],"_links":{"self":[{"href":"https:\/\/corporate.findlaw.com\/legal-api\/wp-json\/wp\/v2\/corporate_contracts\/43539","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/corporate.findlaw.com\/legal-api\/wp-json\/wp\/v2\/corporate_contracts"}],"about":[{"href":"https:\/\/corporate.findlaw.com\/legal-api\/wp-json\/wp\/v2\/types\/corporate_contracts"}],"wp:attachment":[{"href":"https:\/\/corporate.findlaw.com\/legal-api\/wp-json\/wp\/v2\/media?parent=43539"}],"wp:term":[{"taxonomy":"corporate_contracts_companies","embeddable":true,"href":"https:\/\/corporate.findlaw.com\/legal-api\/wp-json\/wp\/v2\/corporate_contracts_companies?post=43539"},{"taxonomy":"corporate_contracts_industries","embeddable":true,"href":"https:\/\/corporate.findlaw.com\/legal-api\/wp-json\/wp\/v2\/corporate_contracts_industries?post=43539"},{"taxonomy":"corporate_contracts_types","embeddable":true,"href":"https:\/\/corporate.findlaw.com\/legal-api\/wp-json\/wp\/v2\/corporate_contracts_types?post=43539"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}