HARSCO CORP
8-K, 1997-10-16
FABRICATED STRUCTURAL METAL PRODUCTS
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, DC 20549

                          -----------------------------

                                    FORM 8-K

                                 CURRENT REPORT
                     PURSUANT TO SECTION 13 OR 15 (d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


DATE OF REPORT (DATE OF EARLIEST EVENT)            OCTOBER 6, 1997
                                        ----------------------------------------

                               HARSCO CORPORATION
- --------------------------------------------------------------------------------
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)


         DELAWARE                          1-3970               23-1483991
         --------                          ------               ----------
(STATE OR OTHER JURISDICTION            (COMMISSION             (I.R.S. EMPLOYER
OF INCORPORATION)                       FILE NUMBER)            IDENTIFICATION
                                                                NUMBER)


CAMP HILL, PENNSYLVANIA                                           17001-8888
- ----------------------------------------                          ----------
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)                          (ZIP CODE)


REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE:       (717) 763-7064
                                                   -----------------------------



                                  Page 1 of 8
<PAGE>   2
ITEM 2.       Acquisition or Disposition of Assets.

On October 6, 1997, Harsco Corporation and FMC Corporation completed the
previously announced sale of United Defense, L.P. to The Carlyle Group for $850
million.

Prior to the sale, FMC had been the managing general partner and 60% owner of
United Defense, L.P., while Harsco owned the balance of 40% as the limited
partner. United Defense supplies ground combat and naval weapons systems for the
U.S. and military customers around the world. United Defense had 1996 sales of
$1 billion.

The sale resulted in pre-tax cash proceeds to Harsco of approximately $340
million and will result in an estimated after tax gain on the sale in the fourth
quarter of approximately $150 million or $3.05 per share, taking into account
provisions for certain retained liabilities, and estimated post closing net
worth adjustments which will be definitized as provided in the Purchase
Agreement dated August 25, 1997.

Included among the assets and liabilities which will be retained by Harsco in
the transaction are the matters described in the Notes to the Consolidated
Financial Statements as of June 30, 1997 included in Form 10-Q.

The unaudited pro forma financial statements are presented for informational
purposes only and do not purport to be indicative of the financial position
which would actually have existed or the results of operations which would
actually have been obtained if the transactions had occurred in the periods
indicated or which may exist or be obtained in the future. The ultimate use of
the proceeds may differ from the assumption used in the pro forma balance sheet
as of June 30, 1997, where the proceeds are reflected as being invested in short
term securities.

The unaudited pro forma balance sheet as of June 30, 1997 gives effect to the
disposal of United Defense, L.P. and the related pro forma adjustments described
in the accompanying notes. The balance sheet is presented as though the disposal
occurred on June 30, 1997.

The unaudited pro forma statements of income for the six months ended June 30,
1997 and the year ended December 31, 1996 give effect to:

     1.   the reclassification of the Equity in income of United Defense, L.P.,
          a 40% equity company of the Registrant and the related Provision for
          income taxes to discontinued operations.

     2.   the related pro forma adjustments described in the accompanying notes.

The pro forma statements of income are presented as though the disposal occurred
on January 1, 1996, but do not reflect any income from investment of the
proceeds of the sale.

These statements should be read in conjunction with the historical financial
statements and accompanying notes of the Registrant.


                                  Page 2 of 8
<PAGE>   3
ITEM 7.       Pro Forma Financial Information and Exhibits

     (b)          Pro Forma Financial Information (Unaudited)

           1.     Condensed Consolidated Balance Sheet as of June 30, 1997.

           2.     Condensed Consolidated Statement of Income for the Six Months
                  Ended June 30, 1997.

           3.     Condensed Consolidated Statement of Income for the Year Ended
                  December 31, 1996.

           4.     Notes to Pro Forma Financial Statements.

<TABLE>
<CAPTION>
     (c)          Exhibit Index                                                                       Document
                                                                                                        Pages

<S>                                                                                                   <C>
           2a.    Purchase Agreement Dated August 25, 1997.                                            1 - 79

           2b.    Supplemental Agreement No. 1 To Purchase Agreement.  (Confidential portions
                  omitted pursuant to a Confidential Treatment Request separately filed with the
                  Commission.)                                                                          1 - 7

           2c.    Allocation and Contribution Agreement.  (Confidential portions omitted
                  pursuant to a Confidential Treatment Request separately filed with the
                  Commission.)                                                                         1 - 16
</TABLE>


                                  Page 3 of 8
<PAGE>   4
<TABLE>
<CAPTION>
                                        HARSCO CORPORATION AND SUBSIDIARY COMPANIES


                                      PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                                                    AS OF JUNE 30, 1997
                                                        (Unaudited)



                                                               ACTUAL
                                                       ------------------------                              PRO FORMA     
                                                                          LESS:            FRO FORMA       HARSCO WITHOUT    
(IN THOUSANDS)                                          HARSCO            UDLP             ADJUSTMENTS          UDLP  
==========================================================================================================================
<S>                                                 <C>                <C>            <C>                   <C>
ASSETS
CURRENT ASSETS:
     Cash and cash equivalents                      $     43,945                      $     340,000(a)      $    383,945
     Receivables                                         287,886                                                 287,886
     Inventories                                         137,671                                                 137,671
     Other current assets                                 64,331                                                  64,331
- --------------------------------------------------------------------------------------------------------------------------
         TOTAL CURRENT ASSETS                            533,833                                                 873,833
==========================================================================================================================
Property, plant and equipment, at cost                 1,199,798                                               1,199,798
Allowance for depreciation                              (690,946)                                               (690,946)
- --------------------------------------------------------------------------------------------------------------------------
                                                         508,852                                                 508,852
- --------------------------------------------------------------------------------------------------------------------------
Cost in excess of net assets of companies
     acquired, net                                       184,636                                                 184,636
Investments in unconsolidated entities                    59,965       $    56,235                                 3,730
Other assets                                              47,707                                                  47,707
- --------------------------------------------------------------------------------------------------------------------------
                                                      $1,334,993       $    56,235    $     340,000         $  1,618,758
==========================================================================================================================
LIABILITIES
CURRENT LIABILITIES:
     Notes payable and current maturities           $     37,068                                            $     37,068
     Accounts payable                                    100,650                                                 100,650
     Accrued compensation                                 41,811                                                  41,811
     Other current liabilities                           116,132                           $133,757(b)           249,889
- --------------------------------------------------------------------------------------------------------------------------
         TOTAL CURRENT LIABILITIES                       295,661                                                 429,418
==========================================================================================================================
Long-term debt                                           232,404                                                 232,404
Deferred income taxes                                     32,298                                                  32,298
Other liabilities                                         90,219                                                  90,219
- --------------------------------------------------------------------------------------------------------------------------
                                                         650,582                            133,757              784,339
==========================================================================================================================
SHAREHOLDERS' EQUITY
Common stock and additional paid-in capital              157,562                                                 157,562
Cumulative adjustments for translation &
     pension liability                                   (38,631)                                               (38,631)
Retained earnings                                        841,394                            150,008              991,402
Treasury stock                                          (275,914)                                              (275,914)
Net Assets                                                                 $56,235           56,235(c)               -0-
- --------------------------------------------------------------------------------------------------------------------------
                                                         684,411            56,235          206,243              834,419
==========================================================================================================================
                                                      $1,334,993       $    56,235     $    340,000         $  1,618,758
==========================================================================================================================

See accompanying notes to unaudited pro forma condensed financial statements.


                                                        Page 4 of 8
</TABLE>
<PAGE>   5
                  HARSCO CORPORATION AND SUBSIDIARY COMPANIES

              PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF INCOME
                     FOR THE SIX MONTHS ENDED JUNE 30, 1997
                                  (Unaudited)

<TABLE>
<CAPTION>

                                                                ACTUAL                          
                                                         --------------------                      PRO FORMA
                                                         HARSCO          LESS:      PRO FORMA    HARSCO WITHOUT
(IN THOUSANDS OF DOLLARS, EXCEPT PER SHARE AMOUNTS)                      UDLP      ADJUSTMENTS        UDLP
================================================================================================================
<S>                                                     <C>             <C>        <C>          <C>
REVENUES:       
  Net Sales                                              $816,963                               $   816,963
  Equity in income of unconsolidated entities              33,959       $33,496                         463 
  Other                                                       327                                       327
- ---------------------------------------------------------------------------------------------------------------
    TOTAL REVENUES                                        851,249        33,496                     817,753
- ---------------------------------------------------------------------------------------------------------------
COSTS AND EXPENSES:
  Cost of products sold                                   328,157                                   328,157
  Cost of services sold                                   293,374                                   293,374
  Selling, general and administrative expenses            106,676                                   106,676
  Research and development expenses                         2,133                                     2,133
  Facilities discontinuance and reorganization costs        3,055                                     3,055
  Other                                                      (569)                                     (569)
- ---------------------------------------------------------------------------------------------------------------
    TOTAL COSTS AND EXPENSES                              732,826                                   732,826
- ---------------------------------------------------------------------------------------------------------------
    INCOME FROM CONTINUING OPERATIONS BEFORE
      INTEREST, INCOME TAXES, AND MINORITY INTEREST       118,423        33,496                      84,927

Interest income                                             2,442                                     2,442
Interest expense                                           (8,513)                                   (8,513)
- ---------------------------------------------------------------------------------------------------------------

    INCOME FROM CONTINUING OPERATIONS BEFORE
      INCOME TAXES AND MINORITY INTEREST                  112,352        33,496                      78,856  

Provision for income taxes                                 42,694         9,866                      32,828
- ---------------------------------------------------------------------------------------------------------------


    INCOME FROM CONTINUING OPERATIONS BEFORE
       MINORITY INTEREST                                   69,658        23,630                      46,028

Minority interest in net income                             3,146                                     3,146
- ---------------------------------------------------------------------------------------------------------------

INCOME FROM CONTINUING OPERATIONS                        $ 66,512       $23,630                 $    42,882
================================================================================================================

Income from continuing operations per
  common share                                                                                  $       .87
================================================================================================================

Average shares of common stock outstanding                                                       49,285,662
================================================================================================================
</TABLE>

See accompanying notes to unaudited pro forma condensed financial statements.

                                  Page 5 of 8


               
        
<PAGE>   6
                   HARSCO CORPORATION AND SUBSIDIARY COMPANIES


              PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF INCOME
                      FOR THE YEAR ENDED DECEMBER 31, 1996
                                   (Unaudited)


<TABLE>
<CAPTION>
                                                                           ACTUAL
                                                                       -------------                                    PRO FORMA
                                                                                       LESS:         PRO FORMA       HARSCO WITHOUT
(IN THOUSANDS OF DOLLARS, EXCEPT PER SHARE AMOUNTS)                  HARSCO             UDLP        ADJUSTMENTS           UDLP
====================================================================================================================================
<S>                                                               <C>                 <C>           <C>              <C>
REVENUES
    Net sales                                                     $ 1,557,643                                        $  1,557,643
    Equity in income of unconsolidated entities                        50,083         $49,361                                 722
    Other                                                                 773                                                 773
- ------------------------------------------------------------------------------------------------------------------------------------
       TOTAL REVENUES                                               1,608,499          49,361                           1,559,138
- ------------------------------------------------------------------------------------------------------------------------------------
COST AND EXPENSES
    Cost of sales                                                   1,176,982                                           1,176,982
    Selling, general and administrative expenses                      207,502                                             207,502
    Research and development expenses                                   5,108                                               5,108
    Facilities discontinuance and reorganization costs                  3,280                                               3,280
    Other                                                                 209                                                 209
- ------------------------------------------------------------------------------------------------------------------------------------
       TOTAL COSTS AND EXPENSES                                     1,393,081                                           1,393,081
- ------------------------------------------------------------------------------------------------------------------------------------
       INCOME FROM CONTINUING OPERATIONS BEFORE
          INTEREST, INCOME TAXES AND MINORITY INTEREST                215,418          49,361                             166,057

Interest income                                                         6,949                                               6,949
Interest expense                                                      (21,483)                                            (21,483)
- ------------------------------------------------------------------------------------------------------------------------------------
       INCOME FROM CONTINUING OPERATIONS BEFORE
          INCOME TAXES AND MINORITY INTEREST                          200,884          49,361                             151,523

Provision for income taxes                                             76,336          14,255                              62,081
- ------------------------------------------------------------------------------------------------------------------------------------
       INCOME FROM CONTINUING OPERATIONS BEFORE
          MINORITY INTEREST                                           124,548          35,106                              89,442

Minority interest in net income                                         5,539                                               5,539
- ------------------------------------------------------------------------------------------------------------------------------------
INCOME FROM CONTINUING OPERATIONS                                 $   119,009         $35,106                        $     83,903
====================================================================================================================================
Income from continuing operations
    per common share                                                                                                 $       1.68
====================================================================================================================================
Average shares of common stock outstanding                                                                             49,883,062
====================================================================================================================================
</TABLE>

See accompanying notes to unaudited pro forma condensed financial statements.

                                  Page 6 of 8
<PAGE>   7


Notes to Pro Forma Financial Statements (Unaudited)

A.     Condensed Consolidated Balance Sheet as of June 30, 1997

       (a)    Adjustment to reflect the proceeds from the sale of United
              Defense, L.P. These funds will be invested immediately in short
              term securities.

       (b)    Adjustment to reflect the estimated income taxes of $100 million
              related to the gain on sale of United Defense, L.P., provisions
              for certain retained liabilities not assumed by The Carlyle
              Group and the estimated amount of adjustments for the change in
              net book value.

       (c)    Adjustment to eliminate Harsco's investment in UDLP.

B.     Condensed Consolidated Statement of Income for the Six Months Ended
       June 30, 1997

              The disposition of the equity company, United Defense L.P., is
              accounted for through the reclassification of the Equity in income
              and the related Provision for income taxes to discontinued
              operations. No other adjustments are necessary.

C.     Condensed Consolidated Statement of Income for the Year Ended December
       31, 1996

              The disposition of the equity company, United Defense, L.P., is
              accounted for through the reclassification of the Equity in income
              and the related Provision for income taxes to discontinued
              operations. No other adjustments are necessary.


                                  Page 7 of 8
<PAGE>   8
                                    SIGNATURE


       Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.




                                             HARSCO CORPORATION
                                                (Registrant)




Date:  October 15, 1997                      By: /s/ Leonard A. Campanaro
                                                 ------------------------
                                                     Leonard A. Campanaro
                                                     Senior Vice President and
                                                     Chief Financial Officer


                                  Page 8 of 8
<PAGE>   9
<TABLE>
<CAPTION>
     (c)          Exhibit Index                                                                       Document
                                                                                                        Pages

<S>                                                                                                   <C>
           2a.    Purchase Agreement Dated August 25, 1997.                                            1 - 79

           2b.    Supplemental Agreement No. 1 To Purchase Agreement.  (Confidential portions
                  omitted pursuant to a Confidential Treatment Request separately filed with the
                  Commission.)                                                                          1 - 7

           2c.    Allocation and Contribution Agreement.  (Confidential portions omitted
                  pursuant to a Confidential Treatment Request separately filed with the
                  Commission.)                                                                         1 - 16
</TABLE>



<PAGE>   1
                                                                 [PROJECT PHLOX]

- --------------------------------------------------------------------------------


                               PURCHASE AGREEMENT


                                      among


                                FMC CORPORATION,

                               HARSCO CORPORATION,

                             HARSCO UDLP CORPORATION

                                       and

                          IRON HORSE ACQUISITION CORP.


                       -----------------------------------

                           Dated as of August 25, 1997
                       -----------------------------------


- ------------------------------------------------------------------------------
<PAGE>   2

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                              Page
                                                                              ----
<S>                                                                           <C>
1.    Certain Definitions; Purchase and Sale of Interests....................  1
      (a)   Certain Definitions..............................................  1
      (b)   Purchase and Sale of Interests; Final Purchase Price.............  3
      (c)   Estimated Final Purchase Price...................................  4

2.    Closing................................................................  4
      (a)   Closing..........................................................  4
      (b)   Net Worth Adjustment.............................................  5
      (c)   Limited Partnership Form of UDLP.................................  7
      (d)   Transfer to FMC Affiliate........................................  8

3.    Conditions to Closing..................................................  8
      (a)   Buyer's Obligation...............................................  8
      (b)   Each Seller's Obligation.........................................  9

4.    Representations and Warranties of Sellers.............................  10

4A.   Representations and Warranties of FMC.................................  10
      (a)   Authority; No Conflicts.........................................  10
      (b)   Ownership of the Interests......................................  11

4B.   Representations and Warranties of Harsco..............................  11
      (a)   Authority; No Conflicts.........................................  11
      (b)   Ownership of the Interests......................................  12

4C.   Representations and Warranties of Sellers.............................  12
      (a)   Authority; No Conflicts.........................................  12
      (b)   Ownership of the Interests......................................  12
      (c)   Subsidiaries and Foreign Affiliates.............................  13
      (d)   Financial Statements............................................  13
      (e)   Title to Tangible Assets Other than Real Property Interests.....  14
      (f)   Title to Real Property..........................................  14
      (g)   Intellectual Property...........................................  15
      (h)   Material Contracts..............................................  15
      (i)   Litigation; Decrees.............................................  17
      (j)   Compliance with Applicable Laws.................................  18
      (k)   Employee Benefit Plans..........................................  18
      (l)   Taxes...........................................................  21
</TABLE>


                                     -i-
<PAGE>   3
<TABLE>
<CAPTION>
                                                                              Page
                                                                              ----
<S>                                                                           <C>
      (m)   Insurance.......................................................  23
      (n)   Environmental Compliance........................................  23
      (o)   Undisclosed Liabilities.........................................  24
      (p)   Absence of Certain Changes or Events............................  24
      (q)   Government Contracts............................................  24
      (r)   Labor Relations.................................................  25
      (s)   Licenses, Permits and Authorizations............................  26
      (t)   Assets..........................................................  26
      (u)   Loss Contracts; Backlog.........................................  26
      (v)   Customers, Distributors and Suppliers...........................  26
      (w)   Dividends by Foreign Affiliates.................................  27

5.    Covenants of Sellers..................................................  27
      (a)   Access..........................................................  27
      (b)   Ordinary Conduct................................................  27
      (c)   Confidentiality.................................................  29
      (d)   Preservation of Business........................................  30
      (e)   Covenant Not to Compete.........................................  30
      (f)   Cooperation.....................................................  30
      (g)   FMC Resource Transfer...........................................  31
      (h)   Intercompany Obligations........................................  31
      (i)   Financing Obligations...........................................  31
      (j)   Notification of Certain Matters.................................  31
      (k)   FMC Arabia......................................................  31

6.    Representations and Warranties of Buyer...............................  32
      (a)   Authority; No Conflicts.........................................  32
      (b)   Actions and Proceedings, etc....................................  32
      (c)   Availability of Funds...........................................  33
      (d)   Acquisition of Interests for Investment.........................  33
      (e)   Fulfillment of Condition........................................  33

7.    Covenants of Buyer....................................................  33
      (a)   Confidentiality.................................................  33
      (b)   Performance of Obligations by Buyer After Closing Date..........  34
      (c)   No Additional Representations; Disclaimer Regarding Estimates
            and Projections.................................................  34
      (d)   Intentionally omitted...........................................  35
      (e)   Certain Guaranties..............................................  35
      (f)   Retained Assets and Liabilities.................................  35
      (g)   1997 Audited Financial Statements...............................  36
</TABLE>


                                      -ii-
<PAGE>   4
<TABLE>
<CAPTION>
                                                                              Page
                                                                              ----
<S>                                                                           <C>
8.    Mutual Covenants......................................................  37
      (a)   Consents........................................................  37
      (b)   Publicity.......................................................  37
      (c)   Best Efforts....................................................  38
      (d)   HSR Act Compliance..............................................  38
      (e)   Cooperation with Financings.....................................  38
      (f)   Environmental Indemnification...................................  39
      (g)   Written Materials and Records...................................  43
      (h)   Transferred Employees and Employee Benefits.....................  44
      (i)   Mutual Release..................................................  50
      (j)   Insurance.......................................................  51
      (k)   Transition Services Agreement...................................  51
      (l)   Technology and Environmental Services Agreement.................  51
      (m)   Lease...........................................................  51
      (n)   Intellectual Property Agreements................................  52
      (o)   Intellectual Property Recordations..............................  52
      (p)   Cash Balance as of the Closing..................................  52
      (q)   FNSS Royalty Dispute.  .........................................  52

9.    Further Assurances....................................................  52

10.   Tax Matters...........................................................  52

11.   Indemnification.......................................................  58
      (a)   Indemnification by Sellers......................................  58
      (b)   Exclusive Remedy................................................  58
      (c)   Indemnification by Buyer........................................  59
      (d)   Losses Net of Insurance and Tax Benefits........................  59
      (e)   Termination of Indemnification..................................  60
      (f)   Procedures Relating to Indemnification..........................  60

12.   Assignment............................................................  61

13.   No Third-Party Beneficiaries..........................................  62

14.   Termination...........................................................  62
</TABLE>


                                      -iii-
<PAGE>   5
<TABLE>
<CAPTION>
                                                                              Page
                                                                              ----
<S>                                                                           <C>
15.   Survival of Representations...........................................  63

16.   Expenses..............................................................  63

17.   Amendment and Waiver..................................................  63

18.   Notices...............................................................  64

19.   Interpretation........................................................  65

20.   No Strict Construction................................................  65

21.   Counterparts..........................................................  65

22.   Entire Agreement......................................................  65

23.   Brokerage.............................................................  65

24.   Schedules.............................................................  66

25.   Representation by Counsel; Interpretation.............................  66

26.   Severability..........................................................  66

27.   Governing Law.........................................................  66

28.   Exhibits and Schedules................................................  67

29.   Dispute Resolution....................................................  67
      (a)   Negotiation.....................................................  67
      (b)   Arbitration.....................................................  67

LIST OF EXHIBITS............................................................  69

LIST OF SCHEDULES...........................................................  70
</TABLE>


                                      -iv-
<PAGE>   6
                            INDEX OF DEFINED TERMS

<TABLE>
<CAPTION>
                                                                              Page
                                                                              ----
<S>                                                                           <C>
Accounting Firm ............................................................   6
Activity ...................................................................  36
Adjusted Net Worth Amount ..................................................   7
Adjustment Amount ..........................................................   4
Adjustment Principles ......................................................   5
Affiliate ..................................................................   1
Agreement ..................................................................   1
Ancillary Agreements .......................................................   1
Applicable Accounting Principles ...........................................   1
Backlog ....................................................................  26
BPI Award ..................................................................  49
Business ...................................................................   1
Buyer ......................................................................   1
Buyer Indemnified Parties ..................................................  58
Buyer Released Parties .....................................................  50
CAS ........................................................................  46
Cause ......................................................................  48
Closing ....................................................................   4
Closing Balance Sheet ......................................................   5
Closing Date ...............................................................   4
Closing Statement ..........................................................   5
COBRA ......................................................................  19
Code .......................................................................  56
Continuing Guaranty ........................................................  35
Continuing LC Obligations ..................................................  31
Defense Segment Plan .......................................................  46
Diligence Confidentiality Agreement ........................................  33
E&Y ........................................................................   5
Environmental Claims .......................................................  42
Environmental Losses .......................................................  40
Environmental Requirements .................................................  23
ERISA ......................................................................  18
Estimated Final Purchase Price .............................................   4
Facility ...................................................................  41
File Plan ..................................................................  44
Final Purchase Price .......................................................   3
Financial Statements .......................................................  13
Financing Obligations ......................................................   2
FMC ........................................................................   1
</TABLE>


                                       -v-
<PAGE>   7
<TABLE>
<CAPTION>
                                                                             Page
                                                                             ----
<S>                                                                          <C>
FMC Arabia .................................................................  31
FMC Arabia Interests .......................................................  31
FMC Employee Benefit Plans .................................................  18
FMC Insurers ...............................................................  40
FMC Intellectual Property Agreement ........................................  52
FMC Master Trusts ..........................................................  48
FMC Salaried Plan ..........................................................  46
FMC Thrift Plan ............................................................  47
Foreign Affiliate Closing Balance Sheet ....................................  56
Foreign Affiliate Tax Basket ...............................................  53
Foreign Affiliates .........................................................  13
FRS ........................................................................   5
Government Contract ........................................................  25
Harsco .....................................................................   1
Harsco Intellectual Property Agreement .....................................  52
Harsco Party ...............................................................  11
Hazardous Material .........................................................  41
HSR Act ....................................................................   8
HUC ........................................................................   1
Inactive Contracts .........................................................   2
Income Tax Returns .........................................................  57
Income Taxes ...............................................................  57
indemnified party ..........................................................  60
Information ................................................................  29
Initial Purchase Price .....................................................   3
Intellectual Property ......................................................   2
Interests ..................................................................   1
IRS ........................................................................  57
June 30 Balance Sheet ......................................................  13
knowledge ..................................................................   2
Latest Financials ..........................................................  13
Lease ......................................................................  51
Leased Property ............................................................  14
Leased Sites ...............................................................  40
Liens ......................................................................  14
Losses .....................................................................  58
Material Adverse Effect ....................................................   2
Material Contracts .........................................................  17
MIP ........................................................................  49
Non-Allowable Costs ........................................................  40
Notice of Disagreement .....................................................   6
</TABLE>


                                      -vi-
<PAGE>   8
<TABLE>
<CAPTION>
                                                                             Page
                                                                             ----
<S>                                                                          <C>
Other Taxes ................................................................  57
Owned Properties ...........................................................  14
Owned Property .............................................................  14
Pension Plan ...............................................................  19
Permitted Liens ............................................................  14
Personnel ..................................................................  24
Post-Closing Environmental Losses ..........................................  41
Post-Closing Partial Period ................................................  53
Pre-Closing Partial Period .................................................  53
Principal Management .......................................................  43
Pro Rata Basis .............................................................   3
Properties .................................................................  14
Property ...................................................................  14
Public Filings .............................................................  38
Purchase ...................................................................   1
Records ....................................................................  44
Remediation Costs ..........................................................  40
Remediation Report .........................................................  39
Representatives ............................................................  67
Required Consent ...........................................................  37
Retained Employees .........................................................  45
Retained Liabilities .......................................................   3
San Jose Plan ..............................................................  47
Schedules ..................................................................   3
Scope of Activity ..........................................................  30
Seller Guaranty ............................................................  35
Seller Indemnified Parties .................................................  59
Seller Information .........................................................  34
Seller Released Parties ....................................................  50
Sellers ....................................................................   1
Settlement and Advance Agreement ...........................................  39
Sites ......................................................................  40
Subsidiaries ...............................................................   3
Substitute Letters of Credit ...............................................  35
Target Adjusted Net Worth Amount ...........................................   3
Tax ........................................................................  57
Tax Laws ...................................................................  57
Tax Returns ................................................................  57
Taxes ......................................................................  57
Taxing Authority ...........................................................  57
Technology and Environmental Services Agreement ............................  51
</TABLE>


                                      -vii-
<PAGE>   9
<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
<S>                                                                          <C>
Third Party Claim ..........................................................  60
Timely Non-Allowable Costs .................................................  40
Transfer Notice ............................................................  31
Transferred Employees ......................................................  45
Transition Services Agreement ..............................................  51
UDLP .......................................................................   1
UDLP Employee Benefit Plans ................................................  18
UDLP Employees .............................................................  47
UDLP Thrift Plan ...........................................................  47
UDLP's Share ...............................................................  57
</TABLE>


                                     -viii-
<PAGE>   10
                               PURCHASE AGREEMENT

            This PURCHASE AGREEMENT (this "Agreement"), dated as of August 25,
1997, is entered into by and among FMC Corporation, a Delaware corporation
("FMC"), Harsco Corporation, a Delaware corporation, Harsco UDLP Corporation, a
Pennsylvania business corporation ("HUC" and, together with Harsco Corporation,
"Harsco"), and Iron Horse Acquisition Corp., a Delaware corporation ("Buyer").
FMC and Harsco are collectively referred to herein as "Sellers."

                              W I T N E S S E T H:

            WHEREAS, FMC is the sole owner and holder of 100% of the outstanding
general partnership interests of United Defense, L.P., a Delaware limited
partnership ("UDLP"), and HUC is the sole owner and holder of 100% of the
outstanding limited partnership interests of UDLP; and

            WHEREAS, Buyer desires to purchase from Sellers, and Sellers desire
to sell to Buyer, 100% of the outstanding general partnership and limited
partnership interests of UDLP (the "Interests") (the sale and purchase of the
Interests being referred to herein as the "Purchase").

            NOW, THEREFORE, the parties hereto hereby agree as follows:

            1.    Certain Definitions; Purchase and Sale of Interests.

            (a) Certain Definitions. As used in this Agreement (including the
Schedules and Exhibits hereto), the following definitions shall apply:

            (i) "Affiliate" shall mean any natural person, and any corporation,
      partnership or other entity, that directly, or indirectly through one or
      more intermediaries, controls or is controlled by or is under common
      control with the party specified.

            (ii) "Ancillary Agreements" shall mean the Transition Services
      Agreement, the Technology and Environmental Services Agreement, the Lease,
      the FMC Intellectual Property Agreement and the Harsco Intellectual
      Property Agreement.

            (iii) "Applicable Accounting Principles" shall mean United States
      generally accepted accounting principles as consistently applied in the
      preparation of the Financial Statements, subject to any exceptions
      therefrom disclosed in the notes to the Financial Statements.

            (iv) "Business" shall mean the entire business and operations of
      UDLP and its Subsidiaries and Foreign Affiliates as conducted on the date
      hereof, including the business to be transferred to UDLP pursuant to
      Section 5(g).
<PAGE>   11
            (v) "Financing Obligations" shall mean (i) indebtedness of UDLP or
      its Subsidiaries for borrowed money, (ii) obligations of UDLP or any of
      its Subsidiaries evidenced by bonds, notes, debentures, letters of credit
      or similar instruments, (iii) obligations of UDLP or any of its
      Subsidiaries under conditional sale, title retention or similar agreements
      or arrangements creating an obligation of UDLP or any of its Subsidiaries
      with respect to the deferred purchase price of property (other than
      customary trade credit), (iv) breakage and other costs relating to
      interest rate and currency obligation swaps, hedges or similar
      arrangements to which UDLP or any of its Subsidiaries is a party and (v)
      all obligations of UDLP or any of its Subsidiaries to guarantee any of the
      foregoing types of obligations on behalf of others.

            (vi) "Inactive Contracts" shall mean all contracts or other legally
      binding arrangements, whether oral or written, which have been entered
      into or assumed by UDLP which provide for the delivery of products or the
      rendering of contract-defined deliverable services by a Seller or UDLP and
      with respect to which the final product has been delivered and the final
      service has been rendered.

            (vii) "Intellectual Property" shall mean all (i) domestic and
      foreign registrations of trademarks, service marks, logos, corporate
      names, protected models, designs, created works, trade names or other
      trade rights, (ii) pending applications for any such registrations, (iii)
      patents and registered copyrights and pending applications therefor, (iv)
      rights to other trademarks, service marks, copyrights, logos, corporate
      names, protected models, designs, created works, trade names and other
      trade rights and all other trade secrets, designs, plans, specifications,
      technology, know-how, methods, designs, concepts and other proprietary
      rights, whether or not registered and (v) rights under any licenses to use
      any copyrights, marks, trade names, trade rights, patents, registered
      models and designs, created works or other proprietary rights.

            (viii) The term "knowledge," when used in the phrase "to the
      knowledge of Sellers," shall mean, and shall be limited to, the actual
      knowledge after reasonable inquiry of the following individuals: Larry D.
      Brady, Robert N. Burt, Michael J. Callahan, Randall S. Ellis, Ronald D.
      Mambu, J. Paul McGrath, Thomas W. Rabaut, Francis Raborn, David A.
      Kolovat, Peter C. Woglom (as to the operations of the Ground Systems
      Division of the Business), Frederick M. Strader (as to the operations of
      the Armament Systems Division of the Business), David Keller, Andy Eross
      and each current member of the Advisory Committee (as defined in that
      certain Partnership Agreement by and among Sellers and UDLP dated January
      1, 1994).

            (ix) "Material Adverse Effect" shall mean a material adverse effect
      upon the Business or the assets, liabilities or financial condition of
      UDLP, its Subsidiaries and Foreign Affiliates taken as a whole.


                                       -2-
<PAGE>   12
            (x) "Pro Rata Basis" shall mean 60% with respect to FMC and 40% with
      respect to Harsco.

           (xi) "Retained Liabilities" shall mean any and all liabilities of
      Sellers, UDLP or any of its Subsidiaries arising out of, relating to, or
      in respect of the matters described on Schedule 7(f) hereto.

          (xii) "Schedules" shall mean the disclosure schedules attached hereto
      and incorporated by reference herein.

         (xiii) "Subsidiaries" shall mean, with respect to any person, any
      corporation or other entity of which 50% or more of the voting power of
      the equity securities or equity interests is owned, directly or
      indirectly, by such person, and shall include (without limitation) in the
      case of UDLP, UDLP International, Inc., a Delaware corporation, UD United
      Defense International Sales Corporation, a Barbados corporation and UDLP
      Components, Limited, a Bermuda corporation, but shall specifically exclude
      the Foreign Affiliates. Notwithstanding anything herein or on Schedule
      4C(c)-1, G&F Company, a California general partnership, shall not be
      deemed a "Subsidiary" for purposes of this Agreement.

All other capitalized terms used herein (or in the Schedules or Exhibits hereto)
and not defined above are defined elsewhere in this Agreement. See "Index of
Defined Terms" above for references to the page numbers on which such terms are
defined.

            (b) Purchase and Sale of Interests; Final Purchase Price. On the
terms and subject to the conditions of this Agreement, at the Closing Sellers
shall sell, transfer and deliver to Buyer, and Buyer shall purchase from
Sellers, the Interests, free and clear of all Liens, and the covenants contained
in Section 5(e) for an aggregate cash purchase price of $510,000,000.00 in
respect of the general partnership interests held by FMC and the covenants made
by FMC in Section 5(e) and $340,000,000.00 in respect of the limited partnership
interests held by HUC and the covenants made by HUC in Section 5(e)
(collectively, the "Initial Purchase Price"). The final purchase price for the
Interests and the covenants contained in Section 5(e) (the "Final Purchase
Price") shall be equal to:

            (i)   the Initial Purchase Price; plus

           (ii) the amount, if any, by which the Adjusted Net Worth Amount
      reflected on the Closing Statement in its final and binding form exceeds
      $160,889,000 (the "Target Adjusted Net Worth Amount"); minus

          (iii) the amount, if any, by which the Target Adjusted Net Worth
      Amount exceeds the Adjusted Net Worth Amount reflected on the Closing
      Statement in its final and binding form.


                                       -3-
<PAGE>   13
            (c) Estimated Final Purchase Price. At the Closing, pursuant to the
provisions of Section 2(a)(i) below, Buyer shall pay Sellers an amount (the
"Estimated Final Purchase Price") equal to the Final Purchase Price as estimated
in good faith by FMC based on information provided by UDLP management and set
forth in a statement delivered to Buyer not less than two business days prior to
the Closing Date. Such notice shall set forth FMC's and UDLP's good faith
estimate of the Adjusted Net Worth Amount. For purposes of this Agreement, the
difference, positive or negative, between the Estimated Final Purchase Price and
the Initial Purchase Price is referred to herein as the "Adjustment Amount."

            2.    Closing.

            (a) Closing. The closing (the "Closing") of the transactions
contemplated hereby shall be held at the offices of Kirkland & Ellis, 200 East
Randolph Drive, Chicago, Illinois at 10:00 a.m., local time, on October 31, 1997
or, if the conditions to Closing set forth in Sections 3(a)(iii) and 3(b)(iii)
shall not have been satisfied or waived by such date, on the third business day
following satisfaction of such conditions. Notwithstanding the scheduled Closing
Date of October 31, 1997, as set forth above, the parties agree to use their
commercially reasonable efforts to cause the Closing to occur earlier on
September 30, 1997, or other mutually agreeable date as soon after September 30,
1997 as practicable. The date on which the Closing shall occur is hereinafter
referred to as the "Closing Date," and the Closing shall be deemed effective as
of 12:01 a.m. on the Closing Date. On the business day immediately preceding the
Closing Date, Buyer and Sellers shall conduct a pre-Closing at the same location
as the Closing, commencing at 10:00 a.m., local time, at which each party shall
present for review by the other party copies in execution form of all documents
required to be delivered by such party at the Closing.

            (i) At the Closing, subject to and on the terms and conditions set
      forth in this Agreement, Buyer shall deliver to Sellers (A) the Estimated
      Final Purchase Price as follows: (1) by wire transfer to a bank account
      designated in writing by FMC, immediately available funds in an amount
      equal to $510,000,000.00 plus 60% of the Adjustment Amount (whether
      positive or negative), and (2) by wire transfer to a bank account
      designated in writing by Harsco, immediately available funds in an amount
      equal to $340,000,000.00 plus 40% of the Adjustment Amount (whether
      positive or negative), (B) an instrument of assumption reasonably
      satisfactory to each Seller and Buyer assuming, subject to the other terms
      and conditions of this Agreement, all of the obligations and liabilities
      of whatever kind of such Seller in its capacity as a partner or
      predecessor of UDLP to be assumed pursuant to the terms of this Agreement,
      (C) such other documents as are specifically required by this Agreement,
      (D) certified copies of resolutions duly adopted by Buyer's board of
      directors authorizing the execution, delivery and performance of this
      Agreement and the Ancillary Agreements to which Buyer is a party, (E) a
      certificate of the Secretary or an Assistant Secretary of Buyer as to the
      incumbency of the officer(s) of Buyer (who shall not be such Secretary or
      Assistant Secretary) executing this Agreement or any Ancillary Agreement,
      (F) a legal opinion of Buyer's special counsel, addressed to each Seller
      and dated the Closing Date, substantially in the form attached hereto as
      Exhibit 2(a)(i) and (G) appropriate releases


                                       -4-
<PAGE>   14
      by UDLP of each Seller as a partner or predecessor of UDLP, in form and
      substance reasonably satisfactory to such Seller and Buyer, and consistent
      with the provisions of Section 8(i) below.

            (ii) At the Closing, subject to and on the terms and conditions set
      forth in this Agreement, Sellers shall deliver or cause to be delivered to
      Buyer (A) such appropriately executed instruments of sale, assignment,
      transfer and conveyance in form and substance reasonably satisfactory to
      Buyer and Seller and its counsel evidencing and effecting the sale and
      transfer to Buyer of the Interests (it being understood that such
      instruments shall not require Sellers or their Affiliates to make any
      additional representations, warranties or covenants, expressed or implied,
      not contained in this Agreement), (B) such other documents as are
      specifically required by this Agreement, (C) certified copies of
      resolutions duly adopted by the board of directors of each Seller
      authorizing the execution, delivery and performance of this Agreement and
      the Ancillary Agreements, to the extent each is a party hereto or thereto,
      (D) a certificate of the Secretary or an Assistant Secretary of each
      Seller, and of UDLP, as to the incumbency of the officer(s) of each (who
      shall not be such Secretary or Assistant Secretary) executing this
      Agreement or any Ancillary Agreement and (E) legal opinions of each
      Seller's special counsel, addressed to Buyer and dated the Closing Date,
      substantially in the form attached hereto as Exhibit 2(a)(ii).

            (b)   Net Worth Adjustment.

            (i) Within 60 days after the Closing Date, UDLP shall, with the
      assistance of FMC consistent with past practice, prepare and deliver to
      Buyer a balance sheet of UDLP as of the Closing Date (the "Closing Balance
      Sheet"). The Closing Balance Sheet shall be prepared in a manner
      consistent with the June 30 Balance Sheet and in accordance with the
      Applicable Accounting Principles (without regard to any purchase
      accounting adjustments arising out of the consummation of the transactions
      contemplated hereby). The Closing Balance Sheet shall be audited by Ernst
      & Young L.L.P. ("E&Y"). E&Y shall also provide audited financial
      statements through the Closing Date to Sellers so that each may comply
      with its respective reporting obligations. In connection with the
      foregoing, UDLP shall provide the Closing Date financial reporting system
      ("FRS") package to FMC five days prior to the commencement of the E&Y
      audit, and UDLP shall provide Buyer and Sellers a complete list of all
      adjustments to accruals in excess of $250,000 made subsequent to June 30,
      1997. E&Y may begin field work for procedural tests prior to delivery of
      the Closing Date FRS package.

            Within 60 days after the Closing Date, UDLP shall, with the
      assistance of FMC, prepare and deliver to Buyer a statement of the
      Adjusted Net Worth Amount as of the Closing Date (the "Closing
      Statement"). The Closing Statement shall be prepared based solely upon the
      Closing Balance Sheet, adjusted in accordance with the principles set
      forth on Schedule 2(b) hereto (the "Adjustment Principles") which, in the
      event of a conflict with the Applicable Accounting Principles, shall
      control. The parties agree that the determination


                                       -5-
<PAGE>   15
      contemplated by this Section 2(b) is solely intended to show changes
      between the Adjusted Net Worth Amount on the Closing Date and the Target
      Adjusted Net Worth Amount as calculated in accordance with Schedule 2(b).
      Subject to the Adjustment Principles, the Target Adjusted Net Worth Amount
      is based upon methodologies, practices and principles used in connection
      with the preparation of the June 30 Balance Sheet and the adjustment
      contemplated by this Section 2(b) can only be properly measured if the
      Closing Statement is prepared using such methodologies, practices and
      principles. During the preparation of the Closing Statement and the period
      of any dispute with respect thereto, Buyer shall and shall cause UDLP to
      (A) provide FMC and FMC's representatives with full access during normal
      business hours to the books, records (including work papers, schedules,
      memoranda and other documents), facilities and employees of UDLP, (B)
      provide FMC as promptly as practicable following the Closing Date (but in
      no event later than 30 days after the Closing Date) with normal year-end
      closing financial information for UDLP for the period ending as of the
      opening of business on the Closing Date and (C) cooperate fully with FMC
      and FMC's representatives, including the provision on a timely basis of
      full access to employees and all other information necessary or useful in
      connection with the preparation of the Closing Statement. The Closing
      Statement shall be reviewed by E&Y and accompanied by an appropriate
      report confirming that the Closing Statement has been prepared in
      accordance with this Section 2(b). During the 30 days immediately
      following receipt by Buyer and FMC of the Closing Statement, Buyer and FMC
      shall be permitted to review E&Y's working papers relating to the audit of
      the Closing Balance Sheet and review of the Closing Statement and Buyer
      shall be permitted to review the financial and accounting papers provided
      by FMC for use in preparing the Closing Statement.

            The Closing Statement shall become final and binding upon the
      parties hereto on the thirtieth day following receipt thereof by Buyer and
      FMC unless Buyer or FMC gives written notice of its disagreement (a
      "Notice of Disagreement") to UDLP and the other parties hereto prior to
      such date. Any Notice of Disagreement shall (A) specify in reasonable
      detail the nature and amount of any disagreement so asserted and (B) only
      include disagreements based on mathematical errors or based on the Closing
      Statement not being prepared in accordance with this Section 2(b). If a
      timely Notice of Disagreement is delivered, then the Closing Statement (as
      revised in accordance with clause (x) or (y) below) shall become final and
      binding upon the parties on the earlier of (x) the date the parties hereto
      resolve in writing any differences they have with respect to any matter
      specified in the Notice of Disagreement or (y) the date any matters
      properly in dispute are finally resolved in writing by the Accounting
      Firm. During the 30 days immediately following the delivery of a Notice of
      Disagreement, FMC and Buyer shall seek in good faith to resolve in writing
      any differences which they may have with respect to any matter specified
      in the Notice of Disagreement. During such period, Buyer or FMC, as
      applicable, shall have full access to the working papers of the other
      prepared in connection with Buyer's review of the Closing Statement and
      preparation of such other party's Notice of Disagreement. At the end of
      such 30-day period, FMC and Buyer shall submit to a "Big-Six" accounting
      firm (the "Accounting Firm") for review and resolution of any and all
      matters which remain in dispute and which were properly included


                                       -6-
<PAGE>   16
      in the Notice of Disagreement, and the Accounting Firm shall make a final
      determination of the Closing Statement which shall be binding on the
      parties (it being understood, however, that the Accounting Firm shall act
      as an arbitrator to determine, based solely on presentations by Buyer and
      FMC (and not by independent review), only those matters which remain in
      dispute and which were properly included in the Notice of Disagreement).
      The Closing Statement shall become final and binding on Buyer and Sellers
      on the date the Accounting Firm delivers its final resolution to the
      parties (which final resolution shall be delivered as soon as practicable
      following the selection of the Accounting Firm and in any event within 30
      days thereafter). The Accounting Firm shall be selected by FMC and Buyer
      or, if such parties are unable to agree, by FMC's and Buyer's independent
      accountants. The fees and expenses of E&Y and the Accounting Firm pursuant
      to this Section 2(b) shall be borne 50% by Buyer and 50% by Sellers on a
      Pro Rata Basis.

            (ii) If the Estimated Final Purchase Price is less than the Final
      Purchase Price, Buyer shall, and if the Estimated Final Price is greater
      than the Final Purchase Price, Sellers shall, within five business days
      after the Closing Statement becomes final and binding on the parties, make
      payment to the other party or parties by wire transfer in immediately
      available funds of the amount of such difference, together with interest
      thereon at the average one-month London Interbank Offered Rate as quoted
      by the Bloomberg Financial Markets Commodities and News Service calculated
      on the basis of the number of days elapsed from the Closing Date to the
      date of payment. Any payments to or by Sellers pursuant to this clause
      (ii) shall be made on a Pro Rata Basis to or by, as the case may be, FMC
      and Harsco.

            (iii) For purposes of this Agreement, the term "Adjusted Net Worth
      Amount" means the total assets of UDLP and its consolidated Subsidiaries
      as of the Closing Date, less the total liabilities of UDLP and its
      consolidated Subsidiaries as of the Closing Date, as reflected on the
      Closing Balance Sheet, after giving effect to the Adjustment Principles
      described on Schedule 2(b).

            (iv) Each party agrees that it will not take any actions with
      respect to the accounting books, records, policies and procedures of UDLP
      that would obstruct or hinder the preparation of the Closing Statement as
      provided in this Section 2(b). Buyer will cooperate in the preparation of
      the Closing Statement, including providing customary certifications to
      Sellers or, if requested, to Sellers' auditors, Ernst & Young L.L.P. or
      the Accounting Firm. Harsco acknowledges and agrees that FMC has sole
      authority to act on behalf of Sellers with respect to all matters relating
      to this Section 2(b).

            (c) Limited Partnership Form of UDLP. Buyer hereby agrees that it
will take all necessary action, including assigning portions of its rights to
purchase the Interests to one or more of its Affiliates, in order to maintain
UDLP as a validly existing Delaware limited partnership for a period of at least
thirty (30) days following the Closing Date, and for at least such 30-day period
Buyer shall take no actions which would have the effect of dissolving, winding
up or liquidating UDLP under the Code or the Delaware Revised Uniform Limited
Partnership Act, each as in effect


                                       -7-
<PAGE>   17
at such time. Notwithstanding any provision of this Agreement to the contrary,
no representation, warranty or covenant shall be deemed to be breached and no
condition to Closing shall be deemed to be unsatisfied as a result of any actual
or prospective impediment to any dissolution, liquidation or winding up of UDLP,
it being understood that Sellers have made and are making no representations or
warranties concerning Buyer's ability to liquidate or otherwise restructure
UDLP.

            (d) Transfer to FMC Affiliate. Notwithstanding anything to the
contrary in this Agreement, the parties hereto agree that, prior to the Closing,
FMC may transfer all of the Interests owned by it to an Affiliate of FMC that is
(i) incorporated in a domestic jurisdiction and (ii) 100% directly or indirectly
owned by FMC, provided that such transfer does not adversely affect UDLP or
Buyer and provided that such Affiliate agrees to be bound by the terms hereof.
Upon such a transfer, the defined term "FMC" as used herein or in the Ancillary
Agreements shall be deemed to include such Affiliate. In no event shall FMC be
relieved of any obligation for which it would otherwise be liable hereunder in
the absence of such a transfer.

            3.    Conditions to Closing.

            (a) Buyer's Obligation. The obligation of Buyer to purchase and pay
for the Interests is subject to the satisfaction (or waiver by Buyer) as of the
Closing of the following conditions:

            (i) The representations and warranties of Sellers made in this
      Agreement shall be true and correct in all material respects as of the
      date hereof and on and as of the Closing Date, as though made on and as of
      the Closing Date, except to the extent of changes or developments
      contemplated by the terms of this Agreement and except for representations
      and warranties that speak as of a specific date or time (which need only
      be true and correct as of such date or time), and each Seller shall have
      performed or complied with all obligations and covenants required by this
      Agreement to be performed or complied with by such Seller by the time of
      the Closing, except for breaches of such representations and warranties
      and covenants that, in the aggregate, together with all information
      disclosed in any supplements, modifications and updates to the Schedules
      by Sellers prior to the Closing as permitted by this Agreement, would not
      have a Material Adverse Effect; and each Seller shall have delivered to
      Buyer a certificate dated the Closing Date and signed by a Vice President
      of it confirming the foregoing;

            (ii) No injunction or order of any court or administrative agency of
      competent jurisdiction shall be in effect as of the Closing which
      restrains or prohibits the consummation of the Purchase;

            (iii) Any applicable waiting period under the Hart-Scott-Rodino
      Antitrust Improvements Act of 1976, as amended (the "HSR Act"), shall have
      expired or been terminated;


                                       -8-
<PAGE>   18
            (iv) Each of FMC, Harsco and UDLP (as appropriate) shall have
      executed and delivered each of the Ancillary Agreements to which it is a
      party;

            (v) Since the date of the Latest Financials, and except as set forth
      on Schedule 3(a)(v) hereto or the other Schedules hereto, there shall have
      been no change in the Business, or the assets, liabilities or financial
      condition of UDLP, its Subsidiaries and Foreign Affiliates, taken as a
      whole, which would result in a Material Adverse Effect (it being
      understood that the failure to be awarded, or the failure to receive
      government funding for, any contract currently under proposal before or
      after the date hereof does not and shall not constitute a failure of the
      condition set forth in this Section 3(a)(v));

            (vi) All Financing Obligations (other than the Continuing LC
      Obligations) shall have been finally repaid in full, terminated or
      reflected in the computation of the Adjusted Net Worth Amount on the
      Closing Statement and Buyer shall have been provided evidence reasonably
      acceptable to Buyer that any and all Liens securing such Financing
      Obligations as have been repaid or terminated shall have been released and
      terminated;

            (vii) Each Seller shall have delivered to Buyer an affidavit, dated
      not more than thirty (30) days prior to the Closing Date, in accordance
      with Code Section 1445(b)(2) and Treasury Regulation section
      1.1445-2(b)(2), which affidavit certifies that such Seller is not a
      foreign person; and

            (viii)The form and substance of all instruments and documents
      required to consummate the transactions contemplated by this Agreement
      shall have been reasonably satisfactory to Buyer and its counsel.

            (b) Each Seller's Obligation. The obligation of each Seller to sell
and deliver or cause to be sold and delivered the Interests to Buyer is subject
to the satisfaction (or waiver by such Seller) as of the Closing of the
following conditions:

            (i) The representations and warranties of Buyer made in this
      Agreement shall be true and correct in all material respects as of the
      date hereof and on and as of the Closing Date, as though made on and as of
      the Closing Date, except to the extent of changes or developments
      contemplated by the terms of this Agreement and except for representations
      and warranties that speak as of a specific date or time (which need only
      be true and correct as of such date or time), and Buyer shall have
      performed or complied with all obligations and covenants required by this
      Agreement to be performed or complied with by Buyer by the time of the
      Closing, except for breaches of such representations and warranties and
      covenants that, in the aggregate, would not have a material adverse effect
      on the ability of Buyer to perform its obligations under this Agreement,
      the Ancillary Agreements and the other agreements contemplated hereby and
      thereby at and after the Closing; and Buyer shall have delivered to each
      Seller a certificate dated the Closing Date and signed by a Vice President
      of it confirming the foregoing;


                                       -9-
<PAGE>   19
            (ii) No injunction or order of any court or administrative agency of
      competent jurisdiction shall be in effect as of the Closing which
      restrains or prohibits the consummation of the Purchase;

            (iii) Any waiting period under the HSR Act shall have expired or
      been terminated;

            (iv) Buyer shall have executed and delivered each of the Ancillary
      Agreements to which it is a party; and

            (v) Buyer shall have obtained the Substitute Letters of Credit in
      accordance with the provisions of Section 7(e) below.

            4.    Representations and Warranties of Sellers.

            4A. Representations and Warranties of FMC. FMC represents and
warrants to Buyer as follows:

            (a) Authority; No Conflicts. FMC is a corporation duly organized,
validly existing and in good standing under the laws of the State of Delaware.
FMC has all requisite corporate power and authority to enter into this Agreement
and such Ancillary Agreements, to the extent it is a party thereto, as are
contemplated hereby to be executed and delivered by it and to consummate the
transactions contemplated hereby and thereby. All corporate acts and other
proceedings required to be taken by FMC to authorize the execution, delivery and
performance of this Agreement and such Ancillary Agreements, to the extent it is
a party thereto, and the consummation of the transactions contemplated hereby
and thereby, have been or will have been at or prior to the Closing duly and
properly taken. This Agreement has been duly executed and delivered by FMC, and
such Ancillary Agreements as are contemplated hereby to be executed and
delivered by FMC will, to the extent it is a party thereto, be duly and validly
executed and delivered by FMC, as applicable. This Agreement and such Ancillary
Agreements constitute, or will constitute, as the case may be, valid and binding
obligations of FMC, to the extent it is a party thereto, enforceable against FMC
in accordance with their respective terms. Except as set forth on Schedule
4C(a)(ii) and except for any consents, authorizations or approvals that are
required under the HSR Act or that may be required solely by reason of Buyer's
status, the execution and delivery of this Agreement and such Ancillary
Agreements as are contemplated hereby to be executed and delivered by FMC do not
or will not, as the case may be, and the consummation by FMC of the transactions
contemplated hereby and thereby and compliance by it with the terms thereof will
not, conflict with, or result in any violation of or default under, or give rise
to a right of termination, cancellation or acceleration of any obligation or to
loss of a benefit under, or result in the creation of any lien, claim,
encumbrance, security interest, option, charge or restriction of any kind upon
any of the assets of UDLP or any of its Subsidiaries under, or require any
consent, authorization or approval under any provision of (A) the certificate of
limited partnership or other organizational documents of UDLP or any of its
Subsidiaries or Foreign Affiliates, (B) any Material Contract to which UDLP or
any Subsidiary or Foreign Affiliate is a party or (C) any material judgment,
order


                                      -10-
<PAGE>   20
or decree or any material statute, law, ordinance, rule or regulation applicable
to UDLP or any of its Subsidiaries or their respective assets.

            (b) Ownership of the Interests. FMC is the sole general partner of
UDLP and holds 100% of the outstanding general partnership interests of UDLP.
The sale and transfer of the Interests owned by FMC to Buyer pursuant to this
Agreement will vest in Buyer all right, title and interest in such Interests,
free and clear of all adverse claims or other Lien, other than adverse claims
created by or through or suffered by Buyer.

            4B. Representations and Warranties of Harsco. Harsco represents and
warrants to Buyer as follows:

            (a) Authority; No Conflicts. Each of HUC and Harsco Corporation
(each, a "Harsco Party") is a corporation duly organized, validly existing and
in good standing under the laws of the jurisdiction of its incorporation. Each
Harsco Party has all requisite corporate power and authority to enter into this
Agreement and such Ancillary Agreements, to the extent it is a party thereto, as
are contemplated hereby to be executed and delivered by it and to consummate the
transactions contemplated hereby and thereby. All corporate acts and other
proceedings required to be taken by each Harsco Party to authorize the
execution, delivery and performance of this Agreement and such Ancillary
Agreements, to the extent it is a party thereto, and the consummation of the
transactions contemplated hereby and thereby, have been or will have been at or
prior to the Closing duly and properly taken. This Agreement has been duly
executed and delivered by each Harsco Party, and such Ancillary Agreements as
are contemplated hereby to be executed and delivered by each Harsco Party will,
to the extent it is a party thereto, be duly and validly executed and delivered
by such Harsco Party, as applicable. This Agreement and such Ancillary
Agreements constitute, or will constitute, as the case may be, valid and binding
obligations of each Harsco Party, to the extent it is a party thereto,
enforceable against each Harsco Party, as applicable, in accordance with their
respective terms. Except as set forth on Schedule 4C(a)(ii) and except for any
consents, authorizations or approvals that are required under the HSR Act or
that may be required solely by reason of Buyer's status, the execution and
delivery of this Agreement and such Ancillary Agreements as are contemplated
hereby to be executed and delivered by each Harsco Party do not or will not, as
the case may be, and the consummation by each Harsco Party of the transactions
contemplated hereby and thereby and compliance by it with the terms thereof will
not, conflict with, or result in any violation of or default under, or give rise
to a right of termination, cancellation or acceleration of any obligation or to
loss of a benefit under, or result in the creation of any lien, claim,
encumbrance, security interest, option, charge or restriction of any kind upon
any of the assets of UDLP or any of its Subsidiaries under, or require any
consent, authorization or approval under any provision of (A) the certificate of
limited partnership or other organizational documents of UDLP or any of its
Subsidiaries or Foreign Affiliates, (B) any Material Contract to which UDLP or
any Subsidiary or Foreign Affiliate is a party or (C) any material judgment,
order or decree or any material statute, law, ordinance, rule or regulation
applicable to UDLP or any of its Subsidiaries or their respective assets.


                                      -11-
<PAGE>   21
            (b) Ownership of the Interests. HUC is the sole limited partner of
UDLP and holds 100% of the outstanding limited partnership interests of UDLP.
The sale and transfer of the Interests owned by HUC to Buyer pursuant to this
Agreement will vest in Buyer all right, title and interest in such Interests,
free and clear of all adverse claims or other Lien, other than adverse claims
created by or through or suffered by Buyer.

            4C. Representations and Warranties of Sellers. Sellers hereby
jointly and severally represent and warrant to Buyer as follows:

            (a)   Authority; No Conflicts.

            (i) UDLP is a limited partnership duly organized, validly existing
      and in good standing under the laws of the State of Delaware. UDLP has all
      requisite partnership power and authority to enter into the Ancillary
      Agreements, to the extent it is a party thereto, as are contemplated
      hereby to be executed and delivered by it and to consummate the
      transactions contemplated thereby. All partnership acts and other
      proceedings required to be taken by UDLP to authorize the execution,
      delivery and performance of such Ancillary Agreements, and the
      consummation of the transactions contemplated thereby, have been or will
      have been at or prior to the Closing duly and properly taken. Such
      Ancillary Agreements as are contemplated hereby to be executed and
      delivered by UDLP will, to the extent it is a party thereto, be duly and
      validly executed and delivered by UDLP. Such Ancillary Agreements will
      constitute valid and binding obligations of UDLP, to the extent it is a
      party thereto, enforceable against UDLP in accordance with their
      respective terms.

            (ii) Except as set forth on Schedule 4C(a)(ii) and except for any
      consents, authorizations or approvals that are required under the HSR Act
      or that may be required solely by reason of Buyer's status, the execution
      and delivery of such Ancillary Agreements as are contemplated hereby to be
      executed and delivered by UDLP do not or will not, as the case may be, and
      the consummation by UDLP of the transactions contemplated thereby and
      compliance by it with the terms thereof will not, conflict with, or result
      in any violation of or default under, or give rise to a right of
      termination, cancellation or acceleration of any obligation or to loss of
      a benefit under, or result in the creation of any lien, claim,
      encumbrance, security interest, option, charge or restriction of any kind
      upon any of the assets of UDLP or any of its Subsidiaries or Foreign
      Affiliates under, or require any consent, authorization or approval under
      any provision of (A) the certificate of limited partnership or other
      organizational documents of UDLP or any of its Subsidiaries or Foreign
      Affiliates, (B) any Material Contract relating to the Business to which
      UDLP or any Subsidiary or Foreign Affiliate is a party or (C) any material
      judgment, order or decree or any material statute, law, ordinance, rule or
      regulation applicable to UDLP or any of its Subsidiaries or Foreign
      Affiliates or their assets.

            (b) Ownership of the Interests. Except for the Interests owned by
FMC and HUC to be purchased by Buyer pursuant to the terms hereof, UDLP has no
outstanding partnership


                                      -12-
<PAGE>   22
interests or other equity securities or any outstanding options, warrants or
other rights exercisable for, or any securities convertible into or exchangeable
for, any such partnership interest or equity securities. Except as set forth on
Schedule 4C(b), there are no outstanding agreements, securities or other
commitments (other than this Agreement) pursuant to which any of Sellers and
UDLP is or may become obligated to issue, sell, purchase, return or redeem any
Interests or other securities of UDLP.

            (c) Subsidiaries and Foreign Affiliates. Schedule 4C(c)-1 attached
hereto sets forth the name and jurisdiction of incorporation of each Subsidiary
of UDLP and the persons owning its outstanding capital stock. Each Subsidiary
and each Foreign Affiliate is duly organized, validly existing and, to the
extent applicable, in good standing under the laws of the jurisdiction of its
incorporation. All of the outstanding shares of capital stock of each Subsidiary
are validly issued, fully paid and non-assessable. Schedule 4C(c)-2 sets forth
the name and nature of certain foreign entities in which UDLP has a direct or
indirect ownership interest (the "Foreign Affiliates") and the ownership of the
equity interests in such entities. Except as set forth on Schedule 4C(c)-1,
Schedule 4C(c)-2 or the other Schedules hereto, neither UDLP nor any Subsidiary
owns or holds the right to acquire any shares of stock or any other investment
or equity interest in any other corporation, partnership, joint venture or other
entity and all such shares and other interests reflected on such Schedules are
owned by UDLP or another Subsidiary free and clear of any Lien or other material
encumbrance and are not subject to any option or right to purchase any such
shares and each Foreign Affiliate has no Subsidiaries. Schedule 4C(c)-1 or
Schedule 4C(c)-2 sets forth the number, type and class of the outstanding shares
of capital stock or other ownership interests or securities of each Subsidiary
and Foreign Affiliate of UDLP and the name of the record and beneficial owner of
each share of capital stock or other equity interests or securities of each
Subsidiary and Foreign Affiliate of UDLP. Except as set forth on Schedule
4C(c)-1, Schedule 4C(c)-2 or the other Schedules hereto, there are no
outstanding options, warrants or other rights exercisable for, or securities
convertible into or exchangeable for, any capital stock or other ownership
interests or securities of any Subsidiary or Foreign Affiliate of UDLP, any
other commitments or agreements providing for the issuance of additional shares,
the sale of treasury shares, or for the repurchase or redemption of shares of
any Subsidiary's or Foreign Affiliate's capital stock, or any agreements of any
kind which may obligate any Subsidiary or Foreign Affiliate to issue, purchase,
register for sale, redeem or otherwise acquire any of its securities or
interests.

            (d) Financial Statements. Schedule 4C(d) sets forth (i) the audited
consolidated balance sheets of UDLP as of December 31, 1995 and December 31,
1996, and the related consolidated statements of operations and cash flows for
UDLP for the fiscal years ended December 31, 1994, December 31, 1995 and
December 31, 1996, together with the auditors' report thereon and (ii) the
unaudited consolidated balance sheet of UDLP as of June 30, 1997 and related
consolidated statements of operations and cash flows for UDLP for the six-month
period then ended (the "Latest Financials"), in each case together with the
notes thereto (collectively, the "Financial Statements"). The consolidated
balance sheet of UDLP as of the fiscal period ended June 30, 1997 is referred to
herein as the "June 30 Balance Sheet." The Financial Statements have been
derived from the accounting books and records of UDLP, were prepared in the
ordinary course of business


                                      -13-
<PAGE>   23
and present fairly in all material respects the financial condition of UDLP as
of the dates of such Financial Statements and the results of operations and cash
flows of UDLP and its consolidated Subsidiaries for the periods indicated in
accordance with the Applicable Accounting Principles.

            (e) Title to Tangible Assets Other than Real Property Interests.
UDLP and its Subsidiaries have good and valid title to all material tangible
assets reflected in the Latest Financials, except those sold or otherwise
disposed of since the date of the Latest Financials in the ordinary course of
business, free and clear of all mortgages, liens, security interests or
encumbrances of any nature whatsoever (collectively, "Liens"), except (i) such
as are disclosed on Schedule 4C(e) or the other Schedules hereto, (ii)
mechanics', carriers', workmen's, repairmen's or other like liens arising or
incurred in the ordinary course of business for which reserves have been
established in accordance with generally accepted accounting principles,
equipment leases with third parties entered into in the ordinary course of
business, liens for taxes, and other governmental charges which are not due and
payable or which may thereafter be paid without penalty for which reserves have
been established in accordance with generally accepted accounting principles and
(iii) other imperfections of title, restrictions or encumbrances, if any, which
would not, individually or in the aggregate, materially impair the use or value
of any such asset (the items in clauses (i)-(iii) being referred to herein
collectively as "Permitted Liens"). The material tangible assets used in the
operation of the Business, taken as a whole, are in normal operating condition
and repair (subject to normal wear and tear). This Section 4C(e) does not relate
to real property or interests in real property, it being the intent of the
parties that such items are the subject of Section 4C(f).

            (f) Title to Real Property. The term "Owned Properties" as used
herein means all real property and interests in real property owned in fee by
UDLP or a Subsidiary as set forth on Schedule 4C(f)-1 (each of such properties
being referred to individually as an "Owned Property"). Schedule 4C(f)-2 sets
forth a list of real properties leased by UDLP or a Subsidiary pursuant to
leases under which UDLP or a Subsidiary has an annual base rental obligation in
excess of $250,000 (individually, a "Leased Property"). An Owned Property or
Leased Property shall be sometimes referred to herein individually as a
"Property" and collectively as the "Properties". UDLP or a Subsidiary has fee
simple title to the Owned Properties, and has a valid leasehold interest in each
of the Leased Properties, in each case free and clear of all mortgages, liens,
security interests, easements, covenants, rights-of-way and other similar
restrictions of any nature whatsoever, except (i) Permitted Liens (as defined in
Section 4C(e) above), (ii) easements, covenants, conditions, rights-of-way and
other restrictions of record that are disclosed in any commitment for title
insurance or other title report previously delivered or made available to Buyer,
(iii) any conditions that may be shown by a current, accurate survey or physical
inspection of the relevant Property made prior to the Closing which do not
materially and adversely affect the use as currently conducted of the Owned
Properties, (iv) existing leases, licenses and possession or occupancy
agreements, if any, (v) (A) zoning, building, fire, health, entitlement and
other land use laws, ordinances, rules and safety regulations and other similar
restrictions, (B) mortgages, liens, security interests or encumbrances that have
been placed by any developer, landlord or other third party on property over
which UDLP or a Subsidiary has easement rights or on any Leased Property and
subordination or similar agreements relating thereto and (C) unrecorded
easements, covenants, rights-of-way, liens or other


                                      -14-
<PAGE>   24
restrictions which do not materially and adversely affect the use as currently
conducted of the Owned Properties, (vi) acts done or suffered to be done by, and
judgments against, Buyer and those claiming by, through or under Buyer, (vii)
any and all orders, decrees, awards or judgments related to any eminent domain
or condemnation proceedings which do not materially and adversely affect the use
as currently conducted of the Owned Properties, (viii) other liens, security
interests, easements, covenants and restrictions of any nature whatsoever which
individually or in the aggregate do not materially and adversely affect the
value or use as currently conducted of the Owned Properties and (ix) with
respect to the lease for the property in Aiken, South Carolina listed on
Schedule 4C(f)-2, an "industrial revenue bond", a copy of which has been made
available to Buyer. Except as set forth on Schedule 4C(f)-1, (i) all
improvements located on the Property are, in the aggregate, in normal operating
condition and repair (normal wear and tear excepted) and, to the knowledge of
Sellers, are free from material structural defect and (ii) there is not now
pending any condemnation or eminent domain proceeding affecting the Property or
any portion thereof, nor, to the knowledge of Sellers, is any such proceeding
threatened by any governmental authority.

            (g) Intellectual Property. The Intellectual Property of UDLP that is
described in clauses (i), (ii) and (iii) of Section 1(a)(vii) is listed on
Schedule 4C(g). Except as disclosed on Schedule 4C(g) or the other Schedules
hereto, UDLP or a Subsidiary or Foreign Affiliate owns or has the right to use,
without payment to any other party, all material Intellectual Property used in
its business. Except as set forth on Schedule 4C(g) or the other Schedules
hereto, no material claims are pending in writing or, to the knowledge of
Sellers, threatened in writing against UDLP or a Subsidiary or Foreign Affiliate
as of the date of this Agreement by any person with respect to the ownership or
use of any of the Intellectual Property owned by UDLP and used in the Business.
Except as set forth on Schedule 4C(g) or the other Schedules hereto, no material
licenses, sublicenses or agreements pertaining to any of the Intellectual
Property owned by UDLP and used in the Business have been granted or entered
into by UDLP or a Subsidiary or Foreign Affiliate. None of Sellers and UDLP has
received any notices of any infringement by any third party with respect to any
of the Intellectual Property owned by UDLP and used in the Business. Except as
set forth on Schedule 4C(g) or the other Schedules hereto, to the knowledge of
Sellers, the operation of the Business does not infringe upon any proprietary
right or other Intellectual Property right of any person in any material
respect. All rights pertaining to Intellectual Property licensed to UDLP by FMC
pursuant to the FMC Intellectual Property Agreement are duly and validly held by
FMC, free and clear of all material Liens. All rights pertaining to Intellectual
Property to be licensed to UDLP by Harsco pursuant to the Harsco Intellectual
Property Agreement are duly and validly held by Harsco, free and clear of all
material Liens.

            (h) Material Contracts. Schedule 4C(h) and the other Schedules
hereto set forth as of the date of this Agreement each of the following types of
written contracts to which UDLP or any Subsidiary or Foreign Affiliate is a
party:

            (i) any employment agreement or employment contract with any officer
      or director of UDLP (excluding any independent contractor) that has future
      liability for cash


                                      -15-
<PAGE>   25
      compensation in excess of $200,000 per annum and is not terminable by
      notice of not more than 60 calendar days for a cost of less than $200,000;

            (ii) any employee collective bargaining agreement;

            (iii) any covenant not to compete that materially impairs the
      Business;

            (iv) any lease or similar agreement under which UDLP or any
      Subsidiary or Foreign Affiliate is a lessor or sublessor of, or makes
      available for use by any third party, any real property owned or leased by
      UDLP or any Subsidiary or Foreign Affiliate or any portion of premises
      otherwise occupied by UDLP or any Subsidiary, in each case which has
      future liability in excess of $250,000 per annum and is not terminable by
      notice of not more than 60 calendar days for a cost of less than $250,000;

            (v) any lease or similar agreement under which (A) UDLP or any
      Subsidiary or Foreign Affiliate is lessee of, or holds or uses, any
      machinery, equipment, vehicle or other tangible personal property owned by
      a third party or (B) UDLP or any Subsidiary or Foreign Affiliate is a
      lessor or sublessor of, or makes available for use by any third party, any
      tangible personal property owned or leased by UDLP or any Subsidiary or
      Foreign Affiliate, in each case which has future liability in excess of
      $500,000 per annum and is not terminable by notice of not more than 60
      calendar days for a cost of less than $500,000;

            (vi) any agreement or contract under which UDLP has borrowed or
      loaned any money, any note, bond, indenture or other evidence of
      indebtedness or any direct or indirect guarantee of such indebtedness of
      others (other than endorsements for the purpose of collection, loans made
      to employees for relocation, travel or other employment-related purposes,
      or purchases of equipment or materials made under conditional or
      instalment sales contracts, in each case in the ordinary course of
      business) which, individually or in the aggregate, has an outstanding
      principal amount in excess of $500,000;

            (vii) any agreement or contract under which either Seller or any
      other person has directly or indirectly guaranteed indebtedness,
      liabilities or obligations of UDLP or any Subsidiary or Foreign Affiliate
      (other than endorsements for the purpose of collection in the ordinary
      course of business and all Guaranties), in each case having an outstanding
      principal amount or aggregate future liability in excess of $1,000,000;

            (viii) any contract or agreement for the purchase of supplies,
      goods, products or other personal property or for the receipt of services
      which involves an unfulfilled obligation of UDLP or any Subsidiary or
      Foreign Affiliate in excess of $5,000,000;

            (ix) any contract or agreement (including the U.S. Department of
      Defense and any other U.S. military purchasing authority), other than any
      Inactive Contracts, for the sale


                                     -16-
<PAGE>   26
      of supplies, goods, products or other personal property or for the
      furnishing of services which involves an unfulfilled obligation of UDLP or
      any Subsidiary in excess of $25,000,000;

            (x) any contract or agreement which provides for the procurement by
      UDLP of consulting, sales representative, marketing or lobbying services
      and which involves an unfulfilled obligation of UDLP in excess of
      $500,000;

            (xi) any joint venture, teaming, co-production or partnership
      contract or agreement involving an unfulfilled obligation of UDLP in
      excess of $5,000,000;

            (xii) any agreement committing UDLP or any of its Subsidiaries to
      purchase or sell any property or asset outside the ordinary course of
      business for consideration in excess of $1,000,000; and

            (xiii) any agreement between UDLP or one or more of its Subsidiaries
      or Foreign Affiliates and any Seller or any Affiliate of any Seller (other
      than UDLP or any of its Subsidiaries or Foreign Affiliates) which involves
      an unfulfilled obligation, individually or in the aggregate, in excess of
      $1,000,000.

            Sellers have delivered to, or made available for inspection by,
Buyer a copy of each contract, lease, license, instrument or other agreement
listed on Schedule 4C(h) as amended to date, other than modifications or
amendments to U.S. government contracts since June 30, 1997 as would not
materially and adversely affect the value of such contracts. Except as disclosed
on Schedule 4C(h) or the other Schedules hereto, UDLP or a Subsidiary or Foreign
Affiliate has performed all material obligations required to be performed by it
to date under each contract, lease, license, commitment, instrument or other
agreement of UDLP or such Subsidiary described on Schedule 4C(h) (collectively,
the "Material Contracts") and is not (with or without the lapse of time or the
giving of notice, or both) in material breach or material default thereunder
and, to the knowledge of Sellers, no other party thereto is (with or without
lapse of time or the giving of notice, or both) in material default under any
Material Contract. Except as set forth on Schedule 4C(h), all of the Material
Contracts are (i) in full force and effect and (ii) to the knowledge of Sellers,
represent the legal, valid and binding obligations of the other parties thereto
and are enforceable against such parties in accordance with their terms.

            (i) Litigation; Decrees. Schedule 4C(i) and the other Schedules
hereto set forth, all lawsuits, claims and judicial or administrative
proceedings (excluding lawsuits, claims or proceedings for workers'
compensation) pending or, to the knowledge of Sellers, threatened against UDLP
or a Subsidiary or Foreign Affiliate or involving any of its respective
properties, assets, operations or businesses and which (A) involve a claim
against UDLP or a Subsidiary or Foreign Affiliate of, or which involve an
unspecified amount which could reasonably be expected to result in liability of,
more than $250,000 or (B) seek any material injunctive relief which would affect
Buyer's acquisition or ownership of the Interests or the operation of the
Business. Neither UDLP nor any Subsidiary or Foreign Affiliate is in material
default under any material judgment, order or


                                      -17-
<PAGE>   27
decree applicable to it of any court, administrative agency or commission or
other governmental authority or instrumentality, domestic or foreign. Schedule
7(f) sets forth certain pending lawsuits or claims that will be retained by a
particular Seller (as indicated thereon) from and after the Closing.

            (j) Compliance with Applicable Laws. Except as set forth on Schedule
4C(j) or the other Schedules hereto, (i) UDLP and its Subsidiaries and Foreign
Affiliates are, and since January 1, 1994 have been, in compliance in all
material respects with all applicable material statutes, laws, ordinances,
rules, orders and regulations of any governmental authority or instrumentality
and (ii) since December 31, 1996, neither UDLP nor any Subsidiary has received
any written communication from a governmental authority that alleges that it is
not in compliance in all material respects with any material federal, state,
foreign or local laws, rules and regulations. This Section 4C(j) does not relate
to environmental matters, Government Contracts and tax matters, it being the
intent of the parties that environmental matters, Government Contract matters
and tax matters are the subject of Sections 4C(n), 4C(q) and 4C(l),
respectively.

            (k) Employee Benefit Plans. Except as set forth on Schedule 4C(k):

            (i) Schedule 4C(k)-1 lists all of the material employee benefit
      plans, programs and arrangements (including each severance or other
      arrangement or policy and each plan, arrangement, program, agreement or
      commitment providing for insurance coverage (including without limitation
      any self-insured arrangements), disability benefits, supplemental
      unemployment benefits, vacation benefits, retirement benefits, life,
      health, accident benefits (including without limitation any "voluntary
      employees' beneficiary association" as defined in Section 501(c)(9) of the
      Code providing for the same or other benefits) or for deferred
      compensation, profit-sharing bonuses, stock options, stock appreciation
      rights, stock purchases or other forms of incentive compensation or
      post-retirement insurance, compensation or benefits) maintained or
      contributed to by UDLP with respect to current or former employees of UDLP
      or any of its Subsidiaries (including the Defense Segment Plan referred to
      in Section 8(h)(iii)) (the "UDLP Employee Benefit Plans") and Schedule
      4C(k)-2 lists all of such material employee benefits plans, programs and
      arrangements maintained or contributed to by FMC in which current or
      former employees of UDLP or any of its Subsidiaries participate (the "FMC
      Employee Benefit Plans"). Sellers have delivered to, or made available for
      inspection by, Buyer a copy of each UDLP Employee Benefit Plan and the
      defined benefit pension plans of FMC covering employees of UDLP and the
      Transferred Employees. Except as provided in clause (vi) of this Section
      4C(k), Sellers make no representations or warranties in this Agreement
      regarding or relating to any of the FMC Employee Benefit Plans.

            (ii) All UDLP Employee Benefit Plans which are "employee benefit
      plans" (as defined in Section 3(3) of the Employee Retirement Income
      Security Act of 1974, as amended ("ERISA")) are in compliance in all
      material respects with the applicable requirements of ERISA, the Code and
      all other applicable law.


                                      -18-
<PAGE>   28
            (iii) Each UDLP Employee Benefit Plan or its predecessor plan which
      is intended to qualify under Section 401(a) of the Code has received a
      favorable determination letter that it is so qualified and that its trust
      is exempt from taxation.

            (iv) All contributions and payments with respect to each UDLP
      Employee Benefit Plan have been timely made when due and there are no
      funding deficiencies (including accumulated funding deficiencies) (as
      defined in ERISA and the Code).

            (v) All ERISA reporting and disclosure obligations have been
      satisfied in all material respects with respect to each UDLP Employee
      Benefit Plan.

            (vi) UDLP and each UDLP Employee Benefit Plan and, with respect to
      employees and former employees of UDLP and its Subsidiaries, each FMC
      Employee Benefit Plan has complied in all material respects with its
      obligations under Section 4980B of the Code and Section 601 et seq. of
      ERISA ("COBRA").

            (vii) To the knowledge of Sellers, with respect to each UDLP
      Employee Benefit Plan: (a) there have not been any prohibited transactions
      (as defined in Section 406 of ERISA or Section 4975 of the Code); (b) no
      fiduciary has any liability for breach of fiduciary duty; and (c) no
      investigations, suits, or material claims are pending.

            (viii) Sellers have delivered or made available to Buyer copies of
      the following documents in connection with each UDLP Employee Benefit
      Plan: (a) plan document and all amendments; (b) current summary plan
      descriptions; (c) the most recent Internal Revenue Service favorable
      determination letter with respect to each UDLP Employee Benefit Plan
      intended to be qualified under the Code; and (d) the most recent IRS Form
      5500.

            (ix) UDLP does not contribute to any "multiemployer plan," as
      defined in Section 3(37) or 4001(a)(3) of ERISA, nor has UDLP at any time
      contributed to, or been obligated to contribute to, any such multiemployer
      plan.

            (x) The funding method used in connection with each UDLP Employee
      Benefit Plan that is an "employee pension benefit plan" as defined in
      Section 3(2) of ERISA (each, a "Pension Plan") which is subject to the
      minimum funding requirements of ERISA is acceptable under law, and the
      actuarial assumptions used in connection with funding each such plan are
      reasonable. As of the Closing Date, the "amount of unfunded benefit
      liabilities" as defined in Section 4001(a)(18) of ERISA of each Pension
      Plan (but excluding from the definition of "current value" of "assets" of
      such Pension Plan accrued but unpaid contributions) did not exceed zero.

            (xi) UDLP and its Subsidiaries have not engaged in, nor are
      successors or parent corporations to an entity that has engaged in, a
      transaction described in Section 4069 of ERISA. There has been no
      "reportable event" (as defined in Section 4043(b) of ERISA and


                                      -19-
<PAGE>   29
      the PBGC regulations under such Section) with respect to any Pension Plan
      and no analogous event under applicable foreign law. No filing has been
      made by UDLP or either Seller with the PBGC, and no proceeding has been
      commenced by the PBGC, to terminate any Pension Plan. No condition exists
      and no event has occurred that could constitute grounds for the
      termination of any Pension Plan by the PBGC. UDLP has not at any time, (1)
      ceased operations at a facility so as to become subject to the provisions
      of Section 4062(e) of ERISA or analogous foreign law, (2) withdrawn as a
      substantial employer so as to become subject to the provisions of Section
      4063 of ERISA or analogous foreign law, or (3) ceased making contributions
      on or before the Closing Date to any Pension Plan subject to Section
      4064(a) of ERISA or analogous foreign law to which UDLP made contributions
      during the six years prior to the Closing Date.

            (xii) There is no contract, agreement, plan or arrangement covering
      any employee or former employee of UDLP that, individually or
      collectively, provides for the payment prior to or in connection with this
      transaction by UDLP of any amount (i) that is not deductible under Section
      162(a)(1) or 404 of the Code or (ii) that is an "excess parachute payment"
      pursuant to Section 280G of the Code.

            (xiii) Each material trust agreement, annuity contract or other
      funding instrument maintained by UDLP and related to a UDLP Employee
      Benefit Plan has been maintained in all material respects in accordance
      with its terms and applicable law.

            (xiv) There is no material action, order, writ, injunction, judgment
      or decree outstanding or claim, suit, litigation, proceeding, arbitral
      action, governmental audit or investigation relating to or seeking
      benefits under any UDLP Employee Benefit Plan that is pending or, to the
      knowledge of Sellers, threatened against UDLP or any UDLP Employee Benefit
      Plan.

            (xv) Neither UDLP nor Sellers has any legally binding commitment to
      create any additional employee benefit plans which are intended to cover
      UDLP employees or to amend or modify any existing UDLP Employee Benefit
      Plan which would result in a material increase in the costs to UDLP of
      such Plan.

            (xvi) No UDLP Employee Benefit Plan holds as an asset any interest
      in any annuity contract, guaranteed investment contract or any other
      investment or insurance contract issued by an insurance company that, to
      the knowledge of Sellers, or UDLP is the subject of bankruptcy,
      conservatorship or rehabilitation proceedings.

            (xvii) Neither the execution and delivery of this Agreement by
      Sellers nor the consummation of the transactions contemplated hereby or
      the related transactions will result in the acceleration or creation of
      any rights of any person to benefits under any UDLP Employee Benefit Plan
      (including, without limitation, the acceleration of the vesting or
      exercisability of any stock options, the acceleration of the vesting of
      any restricted stock, the


                                      -20-
<PAGE>   30
      acceleration of the accrual or vesting of any benefits under any Pension
      Plan or the acceleration or creation of any rights under any severance,
      parachute or change in control agreement).

            (xviii) No event has occurred in connection with which UDLP, any of
      its Subsidiaries or any UDLP Employee Benefit Plan, directly or
      indirectly, could be subject to any material liability (A) under any
      statute, regulation or governmental order relating to any UDLP Employee
      Benefit Plan or (B) pursuant to any obligation of UDLP or any of its
      Subsidiaries to indemnify any person against liability incurred under any
      such statute, regulation or order as it relates to the UDLP Employee
      Benefit Plans.

            (xix) None of the Subsidiaries employs any employees or has any
      obligation to contribute to any of the UDLP Employee Benefit Plans.

            (l) Taxes. Except as otherwise provided in Schedule 4C(1) and except
as would not result in a liability to UDLP or its Subsidiaries in excess of
amounts accrued on the June 30 Balance Sheet or the Closing Statement:

            (i) UDLP and its Subsidiaries have filed, or have been included in,
      all material Tax Returns (as defined below) required to be filed by them
      on or before the Closing Date. To the knowledge of Sellers, the Foreign
      Affiliates have filed, or have been included in, all material Tax Returns
      required to be filed by them on or before the Closing Date.

            (ii) All material Taxes due and payable by UDLP and its Subsidiaries
      (whether or not shown on any Tax Return) have been timely paid in full. To
      the knowledge of Sellers, all material Taxes due and payable by the
      Foreign Affiliates (whether or not shown on any Tax Return) have been
      timely paid in full.

            (iii) No claim has ever been made in writing by a taxing authority
      in a jurisdiction where UDLP or any of its Subsidiaries do not file Tax
      Returns that any of UDLP and its Subsidiaries are or may be subject to
      taxation in a material amount by that jurisdiction. To the knowledge of
      Sellers, no claim has ever been made in writing by a taxing authority in a
      jurisdiction where any of the Foreign Affiliates do not file Tax Returns
      that any of the Foreign Affiliates are or may be subject to taxation in
      any material amount by that jurisdiction.

            (iv) None of UDLP's Subsidiaries or Foreign Affiliates which is a
      corporation has filed a consent under Code Section 341(f) concerning
      collapsible corporations.

            (v) None of UDLP, its Subsidiaries, and its Foreign Affiliates has
      been a United States real property holding corporation within the meaning
      of Code Section 897(c)(2) during the applicable period specified in Code
      Section 897(c)(1)(A)(ii).


                                      -21-
<PAGE>   31
            (vi) None of UDLP, its Subsidiaries and, to the knowledge of
      Sellers, the Foreign Affiliates, (A) has been a member of any affiliated
      group filing a consolidated federal income Tax Return and (B) has any
      liability for material Taxes of any person as defined in Section
      7701(a)(1) of the Code (other than UDLP and its Subsidiaries) under Treas.
      Reg. Section 1.1502-6 (or any similar provision of state, local, or
      foreign law), as a transferee or successor or by contract of indemnity.

            (vii) As of the date hereof, UDLP, its Subsidiaries and, to the
      knowledge of Sellers, the Foreign Affiliates, have no material Tax
      deficiency or claim assessed or, to the knowledge of Sellers, proposed in
      writing against any of them, except to the extent that adequate
      liabilities or reserves with respect thereto are accrued on the Financial
      Statements in accordance with generally accepted accounting principles
      (or, with respect to the Foreign Affiliates, on their financial statements
      determined in accordance with United States generally accepted accounting
      principles) or (i) such deficiency or claim is being contested in good
      faith by appropriate proceedings, (ii) no such accrual is required by
      generally accepted accounting principles and (iii) the nature and amount
      of the disputed Tax is set forth on Schedule 4C(1).

            (viii) As of the date hereof, there are no currently outstanding Tax
      examinations or Tax audits of any of UDLP and its Subsidiaries. To the
      knowledge of Sellers, as of the date hereof, there are no currently
      outstanding Tax examinations or Tax audits of the Foreign Affiliates.

            (ix) Neither UD United Defense International Sales Corporation nor
      UDLP Components, Limited has any investment in U.S. property within the
      meaning of Code Section 956. FMC-Arabia has an investment in U.S. property
      within the meaning of Code Section 956 represented by a loan to UDLP. To
      the knowledge of Sellers, the Foreign Affiliates have no other investments
      in U.S. property.

            (x) None of the property of UDLP or any of its Subsidiaries (A) is
      subject to a lease under (x) Section 168(f)(8) of the Internal Revenue
      Code of 1954, or (y) Code Section 7701(h), (B) secures any debt the
      interest on which is tax-exempt under Code Section 103(a), or (C) is
      tax-exempt use property within the meaning of Code Section 168(h).

            (xi) Neither UD United Defense International Sales Corporation nor
      UDLP Components, Limited nor, to the knowledge of Sellers, any of the
      Foreign Affiliates, is (i) engaged in a United States trade or business
      for federal Income Tax purposes; (ii) a passive foreign investment company
      within the meaning of the Code; or (iii) a foreign investment company
      within the meaning of the Code.

            (xii) To the knowledge of Sellers, none of UDLP, its Subsidiaries
      and Foreign Affiliates has participated in or cooperated with an
      international boycott within the meaning


                                      -22-
<PAGE>   32
      of Code Section 999 or has been requested to do so in connection with any
      transaction or proposed transaction.

            (xiii) Buyer would not be required to include any amount in gross
      income with respect to UD United Defense International Sales Corporation
      or UDLP Components, Limited pursuant to Code Section 951 if the taxable
      year of any of such entities was deemed to end on the Closing Date after
      the Closing.

            (xiv) Since their respective formations through the date hereof,
      UDLP and Armored Vehicle Technologies Associates have been qualified to be
      treated as partnerships for federal Income Tax purposes and neither UDLP
      nor any of its partners has taken a position inconsistent with such
      treatment with regard to any federal Income Tax.

            (xv) This Section 4(C)(1) contains the sole and exclusive
      representations and warranties of Sellers with respect to any Taxes or Tax
      matters, with the exclusion of those representations and warranties
      relating to Taxes to the extent set forth in Section 4C(e), Section 4C(f)
      and Section 4C(k).

            (m) Insurance. Attached hereto as Schedule 4C(m) is a summary of all
material insurance policies issued in favor of UDLP and the Subsidiaries.
Neither UDLP nor any of its Subsidiaries has received (i) any written notice of
cancellation of any policy described on Schedule 4C(m) or refusal of coverage
thereunder, (ii) any written notice that any issuer of such policy has filed for
protection under applicable bankruptcy laws or is otherwise in the process of
liquidating or has been liquidated, or (iii) any other written notice that such
policies are no longer in full force or effect or that the issuer of any such
policy is no longer willing or able to perform its obligations thereunder.

            (n) Environmental Compliance.

            (i) To the knowledge of Sellers, except as set forth on Schedule
      4C(n) hereto or the other Schedules hereto, as of the date hereof UDLP and
      the Subsidiaries are in compliance with all Environmental Requirements,
      except for such noncompliance as would not have a Material Adverse Effect.
      "Environmental Requirements" shall mean all federal, state and local
      statutes, regulations, ordinances, permits, approvals and licenses
      concerning pollution or protection of the environment, including without
      limitation all those relating to the presence, use, production,
      generation, handling, transportation, treatment, storage, disposal,
      distribution, labeling, testing, processing, discharge, release,
      threatened release, control or cleanup of any hazardous materials,
      substances or wastes, as such requirements are enacted and in effect on or
      prior to the date hereof.

            (ii) Except as set forth on Schedule 4C(n) or the other Schedules
      hereto, UDLP has not, since January 1, 1996, received any written notice,
      report or other communication regarding any material violation of
      Environmental Requirements, or any material liabilities,


                                      -23-
<PAGE>   33
      including any material investigatory, remedial or corrective obligations,
      relating to UDLP or its facilities arising under Environmental
      Requirements, except for any of the foregoing, the subject matter of which
      would not have a Material Adverse Effect.

            (iii) To the knowledge of Sellers, Sellers have delivered, or
      otherwise made available, to Buyer copies of all material written
      environmental reports, audits and assessments in Sellers' possession
      relating to any material environmental liabilities of UDLP or any of its
      Subsidiaries.

            (iv) This Section 4C(n) contains the sole and exclusive
      representations and warranties of Sellers with respect to any
      environmental matters, including without limitation any arising under any
      Environmental Requirements.

            (o) Undisclosed Liabilities. Except as set forth on Schedule 4C(o),
neither UDLP nor any of its consolidated Subsidiaries has any material liability
or obligation (whether absolute or contingent, liquidated or unliquidated, or
due or to become due) of a type required to be reflected on a balance sheet
prepared in accordance with Applicable Accounting Principles, except for
liabilities and obligations (i) reflected or reserved for on the balance sheet
included in the Latest Financials, (ii) disclosed or referred to on any of the
Schedules or (iii) that have arisen since or arise after the date of the Latest
Financials in the ordinary course of the operation of the Business (including
pursuant to contracts) and consistent with past practice (all of which are
current liabilities similar in type to those reflected on the balance sheet
included in the Latest Financials).

            (p) Absence of Certain Changes or Events. Since June 30, 1997, UDLP
and its Subsidiaries have operated the Business in the ordinary course,
consistent with past practices. Without limiting the foregoing, since June 30,
1997, except as disclosed on Schedule 4C(p), there has not been any (i) material
adverse change in the Business or the assets, liabilities or financial condition
of UDLP and its Subsidiaries, taken as a whole, (ii) except for normal periodic
increases in the ordinary course of business consistent with past practice,
increase in the compensation payable or to become payable by UDLP or its
Subsidiaries to any of their respective officers, employees or agents
(collectively, "Personnel") whose total compensation for services rendered to
UDLP or its Subsidiaries is currently at an annual rate of more than $100,000 or
any material bonus, incentive compensation, service award or other like benefit
granted, made or accrued, contingently or otherwise, for or to the credit of any
of the Personnel, (iii) material addition to or modification of the employee
benefit plans, arrangements or practices affecting Personnel, (iv) sale,
assignment or transfer of any material assets of UDLP or its Subsidiaries, taken
as a whole, other than in the ordinary course, (v) material change in accounting
methods or practices by UDLP or its Subsidiaries or (vi) revaluation by UDLP or
any of its Subsidiaries of any of their respective material assets.

            (q) Government Contracts. Except as set forth on Schedule 4(C)(q):

            (i) Since January 1, 1994, neither the United States government
      (through relevant contracting officers or the U.S. Department of Justice)
      nor any prime contractor has notified


                                      -24-
<PAGE>   34
      UDLP or either Seller in writing that UDLP has breached or violated in any
      material respect any material statute or regulation pertaining to any
      Government Contract.

            (ii) Neither UDLP nor any of its Subsidiaries has been debarred or
      suspended from participation in the award of any Government Contract nor,
      to the knowledge of Sellers, has any debarment or suspension proceeding
      been initiated against UDLP or any of its Subsidiaries.

            (iii) No material termination for default or show cause notice is,
      or since January 1, 1994 has been, in effect pertaining to any Government
      Contract.

            (iv) Since January 1, 1994, there has been no known governmental
      investigation (other than routine investigations and audit proceedings) of
      UDLP or any of its Subsidiaries regarding an alleged or potential material
      violation of law by UDLP or any of its Subsidiaries with respect to any
      Government Contract.

            (v) Neither UDLP nor any of its Subsidiaries has since January 1,
      1994 in connection with the Business, conducted any material internal
      investigation in connection with which UDLP has engaged outside legal
      counsel or independent accountants, or made any material voluntary
      disclosure to the U.S. government pursuant to the Voluntary Disclosure
      Program of the U.S. government, outside the ordinary course as a result of
      any material suspected irregularity with respect to any Government
      Contract.

            (vi) To the knowledge of Sellers, the cost accounting and
      procurement systems maintained by UDLP and its Subsidiaries in connection
      with the conduct of the Business with respect to Government Contracts are
      in compliance with all applicable material U.S. government laws and
      regulations (including all applicable cost accounting standards) in all
      material respects.

            (vii) With respect to each Government Contract to which UDLP or any
      of its Subsidiaries is a party (A) to the knowledge of Sellers, since
      January 1, 1997, UDLP and each of its Subsidiaries have complied with the
      material terms and conditions of each Government Contract which is a
      Material Contract except for such instances of non-compliance as will not
      result in a termination of the Material Contract or material liability and
      (B) to the knowledge of Sellers, all material representations and
      certifications executed, acknowledged or set forth in each Government
      Contract were complete and correct in all material respects as of their
      effective date. For the purpose hereof, "Government Contract" means any
      contract between the United States government (or a department or agency
      thereof) or any prime contractor to the United States Government and UDLP,
      any of its Subsidiaries or either Seller.

            (r) Labor Relations. Except as set forth on Schedule 4C(r), neither
UDLP nor any of its Subsidiaries has engaged in any unfair labor practice that
would have a Material Adverse


                                      -25-
<PAGE>   35
Effect and there are no material complaints against UDLP or any of its
Subsidiaries pending or, to the knowledge of Sellers, threatened before the
National Labor Relations Board or any similar state or local labor agency.
Except as disclosed on Schedule 4C(r), there are no representation questions,
labor strikes, slow downs or stoppages, grievances or other labor disputes
pending or, to the knowledge of Sellers, threatened with respect to the
employees of UDLP or any of its Subsidiaries that would have a Material Adverse
Effect, and neither UDLP nor any of its Subsidiaries (nor either Seller in
connection with the conduct of the Business) has since January 1, 1994
experienced any such representation question, labor strike, slow down, stoppage
or other labor dispute.

            (s) Licenses, Permits and Authorizations. To the knowledge of
Sellers, UDLP or a Subsidiary has all of the licenses, approvals, consents,
franchises and permits necessary to permit UDLP and its Subsidiaries to conduct
the Business as currently conducted, except as would not have a Material Adverse
Effect.

            (t) Assets. The assets reflected on the June 30 Balance Sheet,
together with all rights of UDLP, its Subsidiaries and Foreign Affiliates under
contracts and the assets of the Foreign Affiliates and such assets as are
transferred to UDLP pursuant to Section 5(g) are all of the material assets used
in the Business.

            (u) Loss Contracts; Backlog. Set forth on Schedule 4C(u)-1 are those
Material Contracts with respect to which UDLP has accrued a loss on the June 30
Balance Sheet. Set forth on Schedule 4C(u)-2 are (i) a list of the Backlog with
respect to contracts for the sale of goods or services to unaffiliated third
parties where there is an official award reported for UDLP, broken out by
division on FMC's internal financial reporting systems as of July 31, 1997,
which totals approximately $1.4 billion and (ii) a list of selected contracts
and their respective approximate Backlog (subject to change based on deliveries
and customer-directed contract modification and authorization changes) for GSD,
ASD and DSI. For purposes of this Agreement, the term "Backlog" means as of any
given date, (i) the total amount awarded and funded under the applicable
contract as of such date less (ii) the amount of the shipments made in respect
of such contract as of such date.

            (v) Customers, Distributors and Suppliers. Schedule 4C(v) sets forth
a list of the names of the (i) ten (10) largest customers of each division of
the Business (or such fewer number as provide a substantial majority of the
revenue of such division) for the most recent fiscal year, showing the
approximate total sales in dollars by the Business to each such customer during
such fiscal year; and (ii) the ten (10) largest suppliers of each division of
the Business (or such fewer number as supply a substantial majority of the
purchases by dollar volume of such division) for the most recent fiscal year
showing the approximate total purchases in dollars by the Business from each
such supplier during such fiscal year. Neither UDLP nor any of its Subsidiaries
has received any communication in writing from any customer or supplier named on
Schedule 4(C)(v) of any intention to terminate or materially reduce purchases
from or supplies to the Business, which termination or reduction would have a
Material Adverse Effect.


                                      -26-
<PAGE>   36
            (w) Dividends by Foreign Affiliates. Schedule 4C(w) sets forth the
aggregate amount of dividends paid to UDLP or the Sellers by each Foreign
Affiliate in each of the preceding five (5) fiscal years and the aggregate
amount of dividends paid by such Foreign Affiliates to UDLP since December 31,
1996.

            5. Covenants of Sellers. Sellers jointly and severally covenant and
agree as follows:

            (a) Access. Prior to the Closing, Sellers shall grant to Buyer or
cause to be granted to Buyer and its representatives, employees, counsel and
accountants reasonable access, during normal business hours and upon reasonable
notice, to the personnel, properties, books and records of UDLP and its
Subsidiaries and Foreign Affiliates, and Sellers shall not object to Buyer's
communicating in a reasonable manner with key customers and suppliers on
matters, relating to the Business; provided, however, that such access does not
unreasonably interfere with the normal operations of UDLP and that Sellers'
approval is required with respect to access to, and communications with
customers and suppliers of, the Foreign Affiliates; provided further, that all
requests for access shall be directed to Randall S. Ellis, or such other person
as Sellers may designate from time to time; and provided further, that Buyer
shall have obtained any and all necessary governmental or administrative
security clearances and approvals. Buyer shall indemnify and hold Sellers, UDLP
and their respective Affiliates, officers, shareholders, directors and employees
harmless against any and all losses, liabilities, expenses and damages or
actions or claims with respect thereto resulting from claims suffered or
incurred by any of such persons or entities arising out of or with respect to
Buyer's or its representatives', agents' or employees' exercise of Buyer's
rights under this Section 5(a) to the extent arising from the negligence or
willful misconduct of Buyer or its representatives, employees, counsel and
accountants. Notwithstanding any provision in this Agreement to the contrary,
Buyer's obligations under this Section 5(a) shall survive the termination of
this Agreement and the consummation of the transactions contemplated hereby.

            (b) Ordinary Conduct. Except as permitted by the terms of this
Agreement or as set forth in Schedule 5(b) or the other Schedules hereto, from
the date hereof to the Closing, Sellers will cause UDLP and its Subsidiaries
and, subject to existing obligations under any applicable agreement with the
minority partners, Foreign Affiliates to conduct the Business in the ordinary
course, consistent with past practices. Except as provided in this Agreement or
Schedule 5(b) or the other Schedules hereto, from the date hereof until the
Closing, Sellers shall not permit UDLP or any of its Subsidiaries or, subject to
existing obligations under any applicable agreement with minority partners,
Foreign Affiliates to do any of the following without the prior written consent
of Buyer:

            (i) in the case of UDLP, amend its Certificate of Limited
      Partnership or its Agreement of Limited Partnership in any manner which
      would be materially adverse to Buyer and, in the case of any Subsidiary or
      Foreign Affiliates of UDLP, amend its corporate charter, bylaws or other
      organizational documents in any manner which would be materially adverse
      to Buyer;


                                      -27-
<PAGE>   37
            (ii) make any material change in the conduct of the Business, except
      as contemplated or permitted by this Agreement;

            (iii) sell, lease, license or otherwise dispose of, or agree to
      sell, lease, license or otherwise dispose of, any interest in any material
      assets of UDLP or any Subsidiary or Foreign Affiliates, except for sales
      in the ordinary course of business;

            (iv) permit, allow or subject any of the material assets owned by
      UDLP or any Subsidiary or Foreign Affiliates to any mortgage, pledge,
      security interest, encumbrance or lien or suffer such to be imposed,
      except for Permitted Liens;

            (v) except in the ordinary course of business or as required by law
      or contractual obligations or other agreements existing on the date
      hereof, increase in any manner the compensation of, or enter into any new
      bonus or incentive agreement or arrangement with, any officers or other
      key personnel;

            (vi) assume, incur or guarantee any obligation for borrowed money
      (other than intercompany indebtedness) having an outstanding principal
      amount in excess of $1,000,000 in the aggregate;

            (vii) enter into a material lease of real property other than in the
      ordinary course of business, except that Buyer acknowledges and consents
      to UDLP entering into any lease the negotiation of which has commenced
      prior to the date of this Agreement or any renewal of a lease to which
      UDLP is a party;

            (viii) directly or indirectly, make any distribution of assets
      (other than cash distributions or other cash payments by UDLP or its
      Subsidiaries in the ordinary course) to its equity holders, or directly or
      indirectly, purchase, redeem, issue, sell or otherwise acquire or dispose
      of any equity interest of UDLP or such Subsidiary or Foreign Affiliate or
      cause any Foreign Affiliate to accelerate the payment of any dividends;

            (ix) issue any equity interests or other securities (other than debt
      securities permitted pursuant to the foregoing clause (vi)) or any
      options, warrants or other rights exercisable for such equity interests or
      other securities or otherwise take (or agree or plan to take) any steps
      affecting or changing the capitalization of UDLP or any its Subsidiaries
      or Foreign Affiliates,

            (x) change its accounting methods, principles or policies in any
      material respect;

            (xi) make any material Income Tax election that could affect Buyer,
      UDLP or its Subsidiaries after the Closing or apply to change any method
      of accounting for Tax purposes in any material respect;


                                      -28-
<PAGE>   38
            (xii) acquire or agree to acquire by merging or consolidating with,
      or acquiring by purchasing a substantial portion of the assets of, or in
      any other manner, any business or any corporation, partnership,
      association or other business organization or division thereof or acquire
      or agree to acquire any material assets or property, except in the
      ordinary course of business and in a manner consistent with past practice;

            (xiii) amend in any materially adverse respect any Material
      Contract; or

            (xiv) enter into any legally binding commitment to do any of the
      foregoing

provided, however, that nothing in this Section 5(b) shall be construed to
prohibit, prevent or otherwise limit Sellers from settling accounts through, or
otherwise making, regular, tax or other special distributions in cash or
repayments of cash from UDLP to any Seller, to the extent that, unless otherwise
provided in this Agreement (including in Section 2(b)), any such distribution or
repayment is reflected on the Closing Statement; and provided further that,
except as set forth in Section 8(p), nothing in this Agreement shall require the
presence of any positive cash balance on the books or in the accounts of UDLP at
the Closing.

            (c) Confidentiality. Each Seller agrees that, after the Closing
Date, it shall, and shall use its reasonable efforts to cause its respective
directors, officers, employees, advisors and Affiliates to, keep the Information
(as defined below) confidential for a period of five years from the Closing
Date, except that any Information required by law or legal or administrative
process to be disclosed may be disclosed without violating the provisions of
this Section 5(c), and except that any Information may be used and disclosed (i)
in connection with the exercise or performance by Sellers of their respective
rights and obligations under or as permitted by the Ancillary Agreements and
(ii) (subject to reasonable and customary confidentiality protections, and
without jeopardizing the protection of trade secrets) in connection with the
development, manufacture, sale or distribution of any product outside of UDLP's
Scope of Activity, in each case without violating the provisions of this Section
5(c); provided, however, that, with respect to Information that consists of
technical information, trade secrets or know-how, the covenants and obligations
of the Sellers in this Section 5(c) shall not terminate so long as such
technical information, trade secrets or know-how is or remains Information
subject to this Section 5(c). At Buyer's request, each Seller shall use legal
action, including the commencement of litigation, if required, to enforce such
confidentiality obligations, and Buyer shall reimburse each such Seller for
reasonable out-of-pocket expenses (including the fees and expenses of counsel)
incurred in connection with such legal action as is requested by Buyer. For
purposes hereof, the term "Information" means all information that relates to
UDLP, the Subsidiaries or the Foreign Affiliates or the Business, other than any
such information that is available to the public on the Closing Date, or
thereafter becomes available to the public other than as a result of a breach of
this Section 5(c), or is developed independently by Sellers or their respective
Affiliates after the Closing or is obtained from third parties who have no duty
of confidentiality to Buyer, UDLP or any of its Subsidiaries or Foreign
Affiliates.


                                      -29-
<PAGE>   39
            (d) Preservation of Business. Prior to the Closing, subject to the
terms and conditions of this Agreement, Sellers shall, and shall cause UDLP and
its Subsidiaries and, subject to applicable agreements with the minority
partners, Foreign Affiliates to, use reasonable best efforts consistent with
past practices to preserve the Business intact, to preserve the goodwill of
customers and suppliers of UDLP and to retain its key employees.

            (e) Covenant Not to Compete. Each Seller agrees that, for a period
of six years following the Closing Date, it will not, and will cause each of its
Affiliates not to, engage, directly or indirectly, anywhere in the world in any
line of business within the Scope of Activity; provided, however, that (i)
Harsco shall be entitled to continue to engage in the development, manufacture,
retrofit, installation, repair, overhaul, engineer, design, service, sale and
marketing of armor and armor kits for sale to the military and other customers,
(ii) Harsco shall be entitled to engage in activities reasonably necessary to
completing the termination and winding up of its former truck and bus business
and (iii) either Seller shall be entitled to engage in the development,
manufacture, retrofit, installation, repair, overhaul, engineer, design,
service, sale and marketing of any component part or subsystem of military
vehicle systems which are substantially the same as classes of products or
services that primarily are commercially sold by such Seller for non-military
uses. If any court of competent jurisdiction shall finally hold that the time,
territory or any other provision set forth in this Section 5(e) constitutes an
unreasonable restriction, such provision shall not be rendered void, but shall
apply as to such time, territory or to such other extent as such court may
determine constitutes a reasonable restriction under the circumstances involved.
Each Seller acknowledges that the restrictions contained in this Section 5(e)
are reasonable and necessary to protect the legitimate interests of Sellers,
UDLP and Buyer and that any breach by either Seller of any provision hereof will
result in irreparable injury to UDLP and Buyer. Each Seller acknowledges that,
in addition to all remedies available at law, UDLP and Buyer shall be entitled
to equitable relief, including injunctive relief, and an equitable accounting of
all losses and damages. For purposes of this Agreement, the "Scope of Activity"
of UDLP shall be to engage in the development, manufacture, retrofit,
installation, overhaul, repair, engineering, design, service, sale and marketing
of any military vehicle system or weapon system or station or component thereof.
It shall not be a violation of this provision for either Seller to purchase or
combine with an entity conducting a business that has products and services that
fall within the Scope of Activity but are incidental to the business of such
entity as a whole. Each Seller further agrees that it will not, for a period
commencing on the date hereof and ending two years following the Closing Date,
knowingly solicit the employment of or hire the employees of UDLP listed on
Schedule 5(e).

            (f) Cooperation. For a period of 90 days after the Closing, Sellers
shall cooperate with Buyer and shall cause its respective officers, employees,
agents and representatives to cooperate with Buyer to the extent reasonably
requested by Buyer to provide for an orderly transition of the Business to
Buyer. Buyer shall reimburse each Seller for the out-of-pocket costs and
expenses incurred by such Seller in assisting Buyer pursuant to this Section
5(f). Notwithstanding the foregoing, neither Seller shall be required by this
Section 5(f) to take any action that would unreasonably interfere with the
conduct of its business or the Business.


                                      -30-
<PAGE>   40
            (g) FMC Resource Transfer. On the Closing Date, FMC shall transfer
to UDLP all of FMC's right, title and interest in and to certain enumerated
assets of FMC's Corporate Technology Center in the manner, and subject to the
terms and conditions, set forth on Schedule 5(g) attached hereto.

            (h) Intercompany Obligations. All outstanding intercompany
obligations between each Seller and UDLP or any of the Subsidiaries shall be
settled and terminated at or prior to Closing, other than obligations that
reflect amounts owed for actual services performed or goods delivered in the
ordinary course.

            (i) Financing Obligations. At or prior to the Closing, Sellers shall
cause all outstanding Financing Obligations (other than Financing Obligations
relating to letters of credit and related reimbursement agreements listed on
Schedule 7(e) which are not replaced as provided in Section 7(e) (the
"Continuing LC Obligations")) to be finally repaid in full, terminated or
reflected in the computation of the Adjusted Net Worth Amount on the Closing
Statement.

            (j) Notification of Certain Matters. From the date hereof through
the Closing, Sellers shall give prompt written notice to Buyer, and Buyer shall
give prompt written notice to Sellers, of (i) the occurrence, or failure to
occur, of any event which occurrence or failure would be likely to cause any of
Sellers' or Buyer's respective representations or warranties contained in this
Agreement to be untrue or inaccurate in any material respect and (ii) any
material failure of Sellers or Buyer to comply with or satisfy any of its
respective covenants, conditions or agreements to be complied with or satisfied
by it under this Agreement; provided, however, that such disclosure shall not be
deemed to cure any breach of a representation, warranty, covenant or agreement
or to satisfy any condition.

            (k) FMC Arabia. The parties acknowledge that UDLP is the beneficial
owner of limited liability company interests in FMC Arabia Limited, a limited
liability company organized under the laws of the Kingdom of Saudi Arabia ("FMC
Arabia"), entitling UDLP to 51% of the capital and profits of FMC Arabia (the
"FMC Arabia Interests") but that FMC is the record owner of the FMC Arabia
Interests. For administrative convenience, the parties desire that FMC retain
record ownership of the FMC Arabia Interests until such time as Buyer provides
FMC with written notice (a "Transfer Notice") instructing FMC to transfer record
ownership of the FMC Arabia Interests to UDLP, but that UDLP continue to be
provided all benefits of ownership of the FMC Arabia Interests. Following
receipt of a Transfer Notice, FMC shall take any and all commercially reasonable
actions necessary to cause record ownership of the FMC Arabia Interests to be
transferred to UDLP, free and clear of all Liens (including, without limitation,
obtaining all requisite governmental and third party consents and/or approvals),
as soon as practical following receipt of the Transfer Notice and in any event
within sixty (60) days after receipt of such Transfer Notice, at the cost and
expense of FMC. From and after the Closing, (i) FMC shall promptly remit and pay
over to UDLP any and all dividends, distributions and other payments received by
FMC in respect of the FMC Arabia Interests and (ii) FMC shall take all actions
reasonably requested by UDLP in respect of the FMC Arabia Interests, including,
without limitation, granting to UDLP proxies or


                                      -31-
<PAGE>   41
powers of attorney in respect of the FMC Arabia Interests or voting the FMC
Arabia Interests as directed by UDLP. FMC acknowledges and agrees that Buyer and
UDLP shall be entitled to specific performance of FMC's obligations under this
Section 5(k). Buyer shall indemnify FMC against any liability or expense it
reasonably incurs as a result of taking any actions requested by UDLP under this
Section other than the cost and expense of causing such ownership to be
transferred to UDLP.

            6. Representations and Warranties of Buyer. Buyer hereby represents
and warrants to Sellers as follows:

            (a) Authority; No Conflicts.

            (i) Buyer is a corporation duly organized, validly existing and in
      good standing under the laws of the State of Delaware. Buyer has all
      requisite corporate power and authority to enter into this Agreement and
      the Ancillary Agreements to which it is a party and to consummate the
      transactions contemplated hereby and thereby. All corporate acts and other
      proceedings required to be taken by Buyer to authorize the execution,
      delivery and performance of this Agreement and the Ancillary Agreements to
      which it is a party and the consummation of the transactions contemplated
      hereby and thereby have been duly and properly taken. This Agreement has
      been duly executed and delivered by Buyer, and the Ancillary Agreements to
      be executed and delivered by Buyer will be duly and validly executed and
      delivered by Buyer. This Agreement and the Ancillary Agreements to which
      Buyer is a party constitute, or will constitute, as the case may be, valid
      and binding obligations of Buyer, enforceable against Buyer in accordance
      with their terms.

            (ii) The execution and delivery by Buyer of this Agreement and the
      Ancillary Agreements to which it is a party do not, and the consummation
      by Buyer of the transactions contemplated hereby and thereby and
      compliance by Buyer with the terms hereof and thereof will not, conflict
      with, or result in any violation of or default under, or give rise to a
      right of termination, cancellation or acceleration of any obligation or to
      loss of a benefit under, or result in the creation of any lien, claim,
      encumbrance, security interest, option, charge or restriction of any kind
      upon any of the properties or assets of Buyer under, or require any
      consent, authorization or approval under any provision of (A) the
      certificate of incorporation or by-laws of Buyer, (B) any material
      contract to which Buyer is a party, or (C) any material judgment, order or
      decree, or any material statute, law, ordinance, rule or regulation
      applicable to Buyer or its property or assets, other than any such
      conflicts, violations, defaults, rights or liens, claims, encumbrances,
      security interests, options, charges or restrictions that, individually or
      in the aggregate, would not prevent Buyer from consummating the
      transactions contemplated hereby, except for any such consents,
      authorizations or approvals required under the HSR Act or that may be
      required solely by reason of a Seller's status or a Seller's participation
      in the transactions contemplated hereby.

            (b) Actions and Proceedings, etc. There are no (i) outstanding
judgments, orders, writs, injunctions or decrees of any court, governmental
agency or arbitration tribunal against Buyer


                                      -32-
<PAGE>   42
which have or could have a material adverse effect on the ability of Buyer to
consummate the transactions contemplated hereby or (ii) actions, suits, claims
or legal, administrative or arbitration proceedings or investigations pending
or, to the knowledge of Buyer, threatened against Buyer, which have or could
have a material adverse effect on the ability of Buyer to consummate the
transactions contemplated hereby.

            (c) Availability of Funds. Buyer has irrevocable commitments, as
described in the Equity Letter issued on the date hereof by The Carlyle Group
and requiring the contribution of capital to Buyer in the amount of
$175,000,000, the Commitment Letter issued on the date hereof to TC Group,
L.L.C. by Bankers Trust Corporation and the Commitment and Engagement Letter
issued on the date hereof to TC Group, L.L.C. by Lehman Brothers, Inc., each of
which is attached hereto as Schedule 6(c), to enable it to consummate the
transactions contemplated by this Agreement. Buyer has no reason to believe that
it will not have cash available at the Closing pursuant to such commitments
necessary to consummate the transactions contemplated by this Agreement. Buyer
has deposited $10,000,000 of the Initial Purchase Price with the escrow agent
pursuant to the terms of the Escrow Agreement attached hereto as Exhibit 6(c).

            (d) Acquisition of Interests for Investment. All securities
purchased, directly or indirectly, by Buyer pursuant to this Agreement are being
acquired for investment only and not with a view to any public distribution
thereof, and Buyer will not offer to sell or otherwise dispose of such
securities so acquired by it in violation of any of the registration
requirements of the Securities Act of 1933, as amended, or any comparable state
law.

            (e) Fulfillment of Condition. Buyer has no knowledge of any state of
facts or conditions which would prevent or otherwise hinder, in any material
respect, fulfillment of the condition to Closing specified in Section 3(b)(iii).

            7. Covenants of Buyer. Buyer covenants as follows:

            (a) Confidentiality of Buyer.

            (i) Buyer acknowledges that all information provided to any of it
      and its Affiliates, agents and representatives by any of FMC, UDLP and
      their respective Affiliates, agents and representatives is subject to the
      terms of a confidentiality agreement between or on behalf of FMC, UDLP and
      Buyer or one or more of their respective Affiliates or other beneficial
      owners (the "Diligence Confidentiality Agreement"), the terms of which are
      hereby incorporated herein by reference. Effective upon, and only upon,
      the Closing, the Diligence Confidentiality Agreement shall terminate.

            (ii) Buyer agrees that, after the Closing Date, Buyer and UDLP shall
      use their respective reasonable efforts to, and shall use their respective
      reasonable efforts to cause their respective directors, officers,
      employees, former employees, advisors and Affiliates to, keep Seller
      Information (as defined below) confidential for a period of five years
      from the Closing


                                      -33-
<PAGE>   43
      Date; provided, however, that with respect to Seller Information that
      consists of technical information, trade secrets or know-how, the
      covenants and obligations of Buyer and UDLP in this Section 7(a)(ii) shall
      not terminate so long as such technical information, trade secrets or
      know-how is or remains Information subject to this Section 7(a); and
      provided further that any Seller Information required by law or legal or
      administrative process to be disclosed may be disclosed without violating
      the provisions of this Section 7(a)(ii). At any Seller's request, Buyer
      shall, or shall cause UDLP to, use legal action, including the
      commencement of litigation, if required, to enforce such confidentiality
      obligations, and such Seller shall reimburse Buyer for reasonable
      out-of-pocket expenses (including the fees and expenses of counsel)
      incurred in connection with such legal action as is requested by such
      Seller. For purposes of this Agreement, the term "Seller Information"
      shall mean all information concerning Sellers or their Affiliates,
      including any financial information, trade secrets, know-how and other
      confidential technical and business information, other than information
      that relates to the Business, UDLP, the Subsidiaries or the Foreign
      Affiliates and other than any such information that is available to the
      public on the Closing Date, or thereafter becomes available to the public
      other than as a result of a breach of this Section 7(a)(ii).

            (b) Performance of Obligations by Buyer After Closing Date. Subject
to Section 8(f), Section 8(h)(xiii), Section 10 and Section 11(a), following the
Closing Date, Buyer shall or shall cause UDLP to duly, promptly and faithfully
pay, perform and discharge when due, (i) all obligations and liabilities of
whatever kind and nature, primary or secondary, direct or indirect, absolute or
contingent, known or unknown, whether or not accrued, whether arising before, on
or after the Closing Date, of UDLP, other than the Retained Liabilities, without
limitation, any such obligations or liabilities contained in any contract or
other agreement and (ii) any liability or obligation of any Seller and its
respective Affiliates with respect to any of the liabilities described in clause
(i), including, without limitation, any guarantee or obligation to assure
performance given or made by one or more of Sellers and their respective
Affiliates with respect to any such obligation of any of UDLP, the Subsidiaries
and the Foreign Affiliates.

            (c) No Additional Representations; Disclaimer Regarding Estimates
and Projections. Buyer acknowledges that neither Seller, nor any other person or
entity acting on behalf of a Seller or any Affiliate of a Seller, (i) has made
any representation or warranty express or implied, including any implied
representation or warranty as to the condition, merchantability, suitability or
fitness for a particular purpose of any of the assets used in the Business or
held by UDLP or (ii) has made any representation or warranty, express or
implied, as to the accuracy or completeness of any information regarding the
Business, UDLP or any Affiliate of UDLP, in each case except as expressly set
forth in this Agreement and the Ancillary Agreements or as and to the extent
required by this Agreement to be set forth in the Schedules hereto. Buyer
further agrees that neither Seller nor any other person or entity will have or
be subject to any liability, except as specifically set forth in this Agreement,
to Buyer or any other person resulting from the distribution to Buyer, or
Buyer's use of, any such information, including the Confidential Offering
Memorandum distributed by Morgan Stanley & Co. Incorporated and any information,
document, or material made


                                      -34-
<PAGE>   44
available to Buyer in certain "data rooms," management presentations or any
other form in expectation of the transactions contemplated by this Agreement.

            In connection with Buyer's investigation of UDLP, Buyer has received
certain projections, including projected statements of operating revenues and
income from operations of the Business and UDLP for the fiscal year ending on
December 31, 1997 and for subsequent fiscal years and certain business plan
information for such fiscal year and succeeding fiscal years. Buyer acknowledges
that there are uncertainties inherent in attempting to make such estimates,
projections and other forecasts and plans, that Buyer is familiar with such
uncertainties and that Buyer is taking full responsibility for making its own
evaluation of the adequacy and accuracy of all estimates, projections and other
forecasts and plans so furnished to it (including the reasonableness of the
assumptions underlying such estimates, projections and forecasts). Accordingly,
neither Seller makes any representation or warranty with respect to such
estimates, projections and other forecasts and plans (including the
reasonableness of the assumptions underlying such estimates, projections and
forecasts).

            (d) Intentionally omitted.

            (e) Certain Guaranties. Sellers and Buyers shall cooperate and use
their respective reasonable best efforts to cause each of the performance bonds,
letters of credit and/or guaranties or other obligations set forth on Schedule
7(e) (each a "Seller Guaranty") to be replaced with performance bonds and/or
letters of credit issued for the account of Buyer. Copies of each of the Seller
Guaranties have been provided to Buyer. If any Seller Guaranty has not been so
replaced as of the Closing (any such Seller Guaranty which is not so replaced
being referred to as "Continuing Guaranty"), Buyer will obtain a letter of
credit in favor of the applicable Seller with a face of amount and expiration
date identical to that set forth in the applicable Continuing Guaranty (the
letters of credit obtained by Buyer in respect of such Continuing Guaranties
being referred to herein as the "Substitute Letters of Credit"). Each Substitute
Letter of Credit shall permit the beneficiary to draw on such Substitute Letter
of Credit only to the extent of any drawing on the Continuing Guaranty to which
such Substitute Letter of Credit relates and shall otherwise be on substantially
the same terms as the Continuing Guaranties set forth on Schedule 7(e) and in
form and substance reasonably satisfactory to Buyer and Sellers. Following the
Closing, Buyer shall also indemnify each Seller for any amounts actually paid by
such Seller in respect of the guarantee obligations set forth on Schedule 7(e),
together with interest thereon at a rate of 8% per annum from the date on which
such Seller makes such payment to the date of reimbursement by Buyer to the
extent that drawings under a Substitute Letter of Credit are not available to
reimburse Sellers for the amounts so paid.

            (f) Retained Assets and Liabilities.

            (i) Litigation. With respect to all litigation matters that are
      designated as retained assets or retained liabilities on Schedule 7(f)
      hereto or which may arise after the execution of this Agreement or the
      Closing, upon the reasonable request of either Seller, Buyer shall
      promptly assist such Seller in the prosecution or defense of any claim,
      threatened claim,


                                      -35-
<PAGE>   45
      audit, investigation or proceeding by or against any governmental entity
      or any other third party (each an "Activity"). Buyer shall cooperate
      promptly with the applicable Seller in such Seller's efforts to
      investigate in a privileged manner, conduct or resolve any such Activity
      as may be deemed necessary or useful in such Seller's sole but reasonable
      discretion; provided, however, that (A) such assistance does not
      unreasonably disrupt the conduct of Buyer's operations and (B) such Seller
      shall reimburse Buyer for all out-of-pocket expenses reasonably incurred
      by Buyer in connection therewith. Such assistance shall be provided by the
      employee or employees of Buyer or UDLP best qualified to provide the
      requested assistance expeditiously, as determined by Buyer in its
      reasonable discretion. Such assistance shall include, without limitation,
      to the extent reasonably practicable, extracting from the files and
      records of Buyer or UDLP all information relevant to the Activity,
      consultation concerning such Activity, testimony, if necessary, in any
      proceeding relating to such Activity, and assistance with the preparation
      of any pleadings or other submissions with respect to such Activity. Such
      assistance shall also require Buyer to grant Harsco sole possession,
      custody, control and access to all documents currently under Harsco's
      custody and control which are contained within the secure areas in the
      west warehouse and the farmhouse of UDLP's York, Pennsylvania plant as of
      the Closing Date. Harsco shall provide copies to Buyer, at Buyer's
      reasonable request, of documents in Harsco's custody and control relating
      to the Business. Buyer also shall provide Harsco access to the above
      secure areas currently used by Seller to store and review said documents
      and conduct interviews. Upon the conclusion of any Activity pertaining to
      the documents contained in the secured areas described above, possession,
      custody and control over said documents shall be relinquished by Harsco to
      Buyer. The parties hereto agree that notwithstanding the foregoing,
      nothing in this Section 7(f)(i) will in any way limit or otherwise affect
      any obligation of Buyer arising under this Agreement or the transactions
      contemplated hereby.

            (ii) Contract Close-outs. With respect to all contracts that are
      designated as retained assets or retained liabilities on Schedule 7(f)
      hereto, as to which the applicable Seller will retain all financial
      liability, if any, Buyer and UDLP will be responsible, from and after the
      Closing, for the administration of the close-out or settlement of such
      contracts. Without limiting the generality of the foregoing, Buyer will
      cooperate as reasonably requested with the applicable Seller in the effort
      to close-out or settle each such contract, including by consulting with
      such Seller on a regular and frequent basis and providing such Seller with
      such information as is requested in such Seller's sole but reasonable
      discretion; provided, however, that such cooperation and consultation does
      not unreasonably disrupt or interfere with the business of UDLP or Buyer.
      Such Seller shall reimburse Buyer for all out-of-pocket expenses
      reasonably incurred by Buyer in connection therewith. In addition, the
      parties hereto agree that neither Buyer nor any Affiliate of Buyer may
      close-out or settle any such contract (or resolve any open issues with
      respect thereto) without the prior written consent of the applicable
      Seller, which will not be unreasonably withheld or delayed.

            (g) 1997 Audited Financial Statements. Buyer shall prepare and
deliver to each Seller at Buyer's sole cost and expense, as promptly as
practicable but in no event later than 90 days


                                      -36-
<PAGE>   46
after the end of UDLP's 1997 fiscal year, a balance sheet of UDLP as of the end
of such fiscal year and the related statements of operations, changes in
partners' equity and cash flow of UDLP for such fiscal year, together with
appropriate notes to such financial statements, and a balance sheet as of the
end of such prior fiscal years and related statements for such number of
additional fiscal years as may be reasonably requested by either Seller in order
for such Seller to comply with Regulation S-X, 17 C.F.R. Section 210.3-09 et
seq. These statements shall reflect all of UDLP's expenses and contingent
liabilities as if UDLP were a stand-alone entity consistent with U.S. generally
accepted accounting principles. These financial statements shall also comply
with the other relevant provisions of Regulation S-X, 17 C.F.R. Section 210, and
shall be audited and reported on by a "big six" accounting firm selected by
Buyer.

            8. Mutual Covenants. Sellers and Buyer covenant and agree as
follows:

            (a) Consents. Buyer acknowledges that certain consents to the
transactions contemplated by this Agreement or the Ancillary Agreements may be
required from parties to contracts, leases, licenses or other agreements
(written or otherwise) to which any of Sellers and UDLP or any of their
respective Affiliates is a party (a "Required Consent") and such consents may
not be obtained prior to the Closing. Sellers shall cooperate with Buyer in any
reasonable manner and take such reasonable actions as Buyer may request in
connection with Buyer's obtaining any such consents; provided, however, that
such cooperation shall not include any requirement of Sellers to expend money,
commence any litigation or offer or grant any accommodation (financial or
otherwise) to any third party. In the event that such consents are not obtained,
Sellers shall take such additional actions as reasonably requested by Buyer to
provide to Buyer the economic benefits of such contracts, leases, licenses or
other agreements, including without limitation by subcontracting, sublicensing
or other similar arrangements, provided that Buyer performs and discharges its
obligations under such contracts, leases, licenses or agreements.

            (b) Publicity. Each Seller and Buyer agree that, from the date
hereof through the Closing Date, no public release or announcement concerning
the transactions contemplated hereby shall be issued or made by Buyer without
the prior consent of Sellers (which consent shall not be unreasonably withheld)
and no public release or announcement concerning the transactions contemplated
hereby shall be issued or made by any Seller without the prior consent of Buyer
(which consent shall not be unreasonably withheld), except (i) as such release
or announcement may be advisable or required by law or the rules or regulations
of any United States or foreign securities exchange on which such party's
securities are listed, in which case the party required to make the release or
announcement shall allow the other party reasonable time to comment on such
release or announcement in advance of such issuance and (ii) that each of
Sellers and UDLP may make such an announcement to their respective employees.
Notwithstanding the foregoing, Buyer and each Seller shall cooperate to prepare
press releases to be issued at the time of the signing of this Agreement and on
the Closing Date. Each Seller and Buyer agree to keep the terms of this
Agreement confidential, except to the extent required by applicable law or for
financial reporting purposes and except that the parties may disclose such terms
to their respective accountants and


                                      -37-
<PAGE>   47
other representatives as necessary in connection with the ordinary conduct of
their respective businesses (so long as such persons agree to keep the terms of
this Agreement confidential).

            (c) Best Efforts. Subject to the terms of this Agreement (including
the limitations set forth in Section 8(a)), each party will use its reasonable
best efforts to cause the Closing to occur.

            (d) HSR Act Compliance. Buyer and Sellers shall each file or cause
to be filed with the Federal Trade Commission and the United States Department
of Justice any notifications required to be filed under the HSR Act with respect
to the transactions contemplated hereby and each of Buyer and Sellers shall bear
the costs and expenses of their respective filings; provided, however, that
Buyer shall pay the filing fee in connection therewith. Each of Buyer and
Sellers shall use their respective best efforts to make such filings promptly
(and in any event within five business days) following the date hereof, to
respond to any requests for additional information made by either of such
agencies and to cause the waiting periods under the HSR Act to terminate or
expire at the earliest possible date and to resist in good faith, at each of
their respective cost and expense (including the institution or defense of legal
proceedings), any assertion that the transactions contemplated hereby constitute
a violation of the antitrust laws, all to the end of expediting consummation of
the transactions contemplated hereby. Each of Buyer, FMC and Harsco shall
consult with the other prior to any material submission to and any meetings, by
telephone or in person, with the staff of the Federal Trade Commission and the
United States Department of Justice, and each of Buyer, FMC and Harsco shall
have the right to review any such submission and have a representative present
at any such meeting.

            (e) Cooperation with Financings. Sellers acknowledge that Buyer may
use the Financial Statements and other information regarding the Business, UDLP,
its Subsidiaries and the Foreign Affiliates in connection with financings
necessary to consummate the Closing, including in a Rule 144A offering
memorandum and a registration statement filed under the Securities Act of 1933,
as amended (the "Public Filings") to be issued or filed by Buyer. Sellers shall
(and shall cause UDLP and its Subsidiaries to) cooperate in a commercially
reasonable manner with Buyer prior to the Closing so that Buyer can obtain
information sufficient for Buyer to prepare a Rule 144A offering memorandum and
the Public Filings, in each case at Buyer's sole expense. The foregoing
cooperation of Seller shall include (i) compiling the requisite financial
information, including supplying financial information for purposes of comfort
letters to be issued in connection with Public Filings, (ii) granting Buyer or
UDLP's accountants, E&Y, full and complete access to the books and records of
UDLP and to any personnel knowledgeable about such books and records (including
UDLP's independent accountants), in each case, to the extent reasonably
requested by Buyer, (iii) signing customary management representation letters
related to the Financial Statements and any comfort letters and (iv) using
commercially reasonable efforts to furnish necessary financial information for
additional periods subsequent to June 30, 1997 and prior to the Closing in
connection with such financings.


                                      -38-
<PAGE>   48
            (f)   Environmental Indemnification.

            (i) Non-San Jose/Santa Clara Properties. From and after the Closing,
      subject to clause (ii) below, Buyer shall be responsible for the costs of
      all environmental matters relating to the Business that are allowable
      costs under applicable government contracting statutes and regulations.

            (ii) San Jose/Santa Clara Properties. Subject to the remaining
      provisions of this Section 8(f), FMC will retain and will be responsible
      for 100% of all Remediation Costs after the Closing Date on the Sites
      covered by the Settlement and Advance Agreement, whether or not leased
      pursuant to the Lease. For a period of ten years following the Closing
      Date, FMC agrees that with respect to the Sites, it shall provide to Buyer
      no later than December 31 of each year commencing with the year 1997 a
      written report (a "Remediation Report") containing the following
      information prepared in good faith by or on behalf of FMC: (A) projected
      Remediation Costs for all of the Sites for each of the four years
      following such year (e.g., by December 31, 1997 FMC will provide projected
      Remediation Costs for the years 1998, 1999, 2000 and 2001) and (B)
      projected recoveries for the four years following such year (calculated
      with reference to the Settlement and Advance Agreement) from FMC Insurers
      attributable and allocable to the Sites. Attached hereto as Schedule
      8(f)(ii) are the Remediation Reports containing Remediation Costs and FMC
      Insurers recovery projections for years 1997, 1998 and 1999. Buyer agrees
      that it shall pay to FMC periodically, but in no event more frequently
      than quarterly, commencing September 30, 1997 and ending December 31, 2008
      a portion of any such Remediation Costs incurred for any year during such
      period equal to (X) the amount of Remediation Costs incurred by FMC during
      such year less (Y) the amount of the recoveries from FMC Insurers for such
      year projected in the applicable Remediation Report multiplied by (Z)
      0.78; provided, however, that (X) in no event shall the aggregate amount
      of such payments by Buyer exceed $16,700,000, (Y) the applicable
      Remediation Costs are incurred in accordance with the Advance Agreement
      and (Z) the total amount of Remediation Costs incurred during such year
      shall not exceed the projected Remediation Costs for such year set forth
      in the Remediation Report delivered twelve months prior to the
      commencement of such year. Buyer further agrees that it shall be
      responsible for performing, and shall perform, all of FMC's reporting
      obligations under the Settlement and Advance Agreement and that neither
      Buyer nor UDLP shall amend, modify or otherwise alter the Settlement in
      any manner materially disadvantageous to FMC and HUC without FMC's prior
      written consent, which consent shall not be unreasonably withheld. FMC
      agrees that it shall provide to Buyer as reasonably requested all
      information with respect to the Sites (whether relating to insurance,
      recoveries, Remediation Costs or otherwise) to the extent Buyer deems such
      information reasonably necessary or desirable in respect of Buyer's
      obligations under the Settlement and Advance Agreement. For purposes of
      this Agreement, the term "Settlement and Advance Agreement" shall mean the
      Settlement and Advance Agreement, dated as of December 15, 1995, by and
      among UDLP, FMC Corporation and the United States Department of Defense,
      represented by the Corporate Administrative Contracting Officer assigned
      to UDLP, and the


                                      -39-
<PAGE>   49
      terms "FMC Insurers", "Remediation Costs" and "Sites" shall have the
      meaning ascribed to such terms in the Settlement and Advance Agreement.
      Notwithstanding anything to the contrary contained in this Agreement or
      the Lease, Buyer agrees that, from and after the Closing Date, FMC shall
      have the sole right to initiate, control, direct and manage any
      investigative, corrective or remedial action on or with respect to any of
      the Sites. In connection with any such investigative, corrective or
      remedial actions to be taken after the Closing by FMC, Buyer and UDLP will
      cooperate with FMC as reasonably requested in providing access at
      reasonable times and under reasonable conditions to the Sites covered by
      the Lease (the "Leased Sites") for the employees, agents and equipment of
      FMC or its contractors and in permitting FMC to construct, maintain and
      operate on the Leased Sites, at no charge to FMC by Buyer or UDLP, such
      equipment and facilities (including without limitation pump and treat
      facilities) as are deemed necessary or desirable by FMC in order to effect
      such investigative, corrective or remedial actions. FMC shall cooperate
      with Buyer and UDLP as reasonably requested in taking all such actions in
      a manner designed to minimize to the extent reasonably practicable any
      disruption to the operations of the Business on the Leased Sites.

            (iii) Except for Remediation Costs which are the subject of Section
      8(f)(ii), Sellers and Buyer agree to the following allocation of
      responsibility for Environmental Losses which are not allowable costs
      under applicable government contracting statutes and regulations (the
      "Non-Allowable Costs"):

                  (A) Buyer shall pay or cause UDLP to pay (or, if applicable,
            reimburse Sellers for the payment of) 25% of Non-Allowable Costs
            with respect to matters that are discovered by UDLP or Buyer and of
            which Sellers are notified in writing prior to the third anniversary
            of the Closing Date (the "Timely Non-Allowable Costs");

                  (B) Sellers shall, subject to the provisions of Section
            8(f)(vi), pay (or, if applicable, reimburse Buyer or UDLP for the
            payment of) 75% of Timely Non-Allowable Costs; provided, however,
            that any obligation of Sellers to pay Timely Non-Allowable Costs
            that have not been previously incurred and for which Sellers have
            not received written notice by the tenth anniversary of the Closing
            Date shall terminate on such tenth anniversary; and

                  (C) Buyer shall pay or cause UDLP to pay (or, if applicable,
            reimburse Sellers for the payment of) 100% of Non-Allowable Costs
            that are not Timely Non-Allowable Costs.

      For purposes of this Agreement, (1) the term "Environmental Losses" means
      all Losses (as defined in Section 11(a) hereto) incurred by Buyer or UDLP
      consistent with commercially reasonable environmental practices to the
      extent, and in the amount, arising from or relating to (i) the use,
      handling, storage, treatment, recycling, generation, transportation,
      release, spilling, leaking, pumping, pouring, emptying, discharging,
      injecting, escaping, leaching,


                                      -40-
<PAGE>   50
      disposal (on-site or off-site), dumping, or threatened release of
      Hazardous Materials on or prior to the Closing Date by UDLP or its
      Subsidiaries or their predecessors in interest, or by their agents,
      representatives, employees, or independent contractors when acting in such
      capacity on behalf of UDLP or its Subsidiaries; (ii) the exposure on or
      prior to the Closing of persons to Hazardous Materials in the work place
      at any current or former facility of the Business (a "Facility"); (iii)
      the exposure of persons or property as a result of Hazardous Materials
      released at or from any Facility on or prior to the Closing Date migrating
      from or otherwise emanating from any Facility; (iv) the off-site disposal
      of any Hazardous Materials that were generated at any Facility on or prior
      to the Closing Date; or (v) any pre-Closing violation of, or noncompliance
      with, any Environmental Requirement occurring with respect to the Business
      or any Facility on or prior to the Closing Date; provided, however, that
      Environmental Losses shall not include costs expended by Buyer or UDLP for
      remedial actions that are not reasonably necessary to comply with
      Environmental Requirements; and (2) the term "Hazardous Material" means
      any substance with respect to which liability or standards of conduct are
      imposed pursuant to an Environmental Requirement.

            (iv) Sellers, UDLP and Buyer acknowledge and agree that, from and
      after the Closing, their sole and exclusive remedy with respect to any and
      all claims relating to environmental matters relating to UDLP and the
      Business, including Non-Allowable Costs, shall be pursuant to the
      provisions of this Section 8(f). In furtherance of the foregoing, and
      except for matters which are the responsibility of Sellers pursuant to
      this Section 8(f), Sellers, UDLP and Buyer hereby waive, from and after
      the Closing, to the fullest extent permitted under applicable law, any and
      all rights, claims and causes of action each of them may have against one
      another with respect to environmental matters. Buyer and UDLP agree to
      assume on the Closing Date all Post-Closing Environmental Losses and
      further agree to indemnify and hold Sellers harmless from and against all
      Post-Closing Environmental Losses with respect to UDLP, its Affiliates and
      successors or the Business. The term "Post-Closing Environmental Losses"
      means all Losses (as defined in Section 11(a) hereto) incurred by Seller
      to the extent and in the amount arising from: (i) the use, handling,
      storage, treatment, recycling, generation, transportation, release,
      spilling, leaking, pumping, pouring, emptying, discharging, injecting,
      escaping, leaching, disposal (on-site or off-site), dumping, or threatened
      release of Hazardous Material after the Closing Date by Buyer, UDLP or its
      Subsidiaries or their successors in interest, or by their agents,
      representatives, employees, or independent contractors when acting in such
      capacity on behalf of Buyer, UDLP or its Subsidiaries or their successors
      in interest, or by their agents, representatives, employees, or
      independent contractors when acting in such capacity on behalf of Buyer,
      UDLP or its Subsidiaries; (ii) the exposure of persons to Hazardous
      Materials released after the Closing in the work place at any Facility
      owned or operated by Buyer, UDLP or its Subsidiaries; (iii) the exposures
      of persons or property as a result of Hazardous Materials released at or
      from any Facility owned or operated by Buyer, UDLP or its Subsidiaries
      after the Closing Date migrating from or otherwise emanating from any
      Facility owned or operated by Buyer, UDLP or its Subsidiaries; (iv) the
      off-site disposal of any Hazardous Materials that were generated at any
      Facility owned or operated by Buyer, UDLP or its Subsidiaries after the


                                      -41-
<PAGE>   51
      Closing Date; or (v) any violation of, or noncompliance with, any
      Environmental Requirement occurring with respect to the Business or any
      Facility owned or operated by Buyer, UDLP or its Subsidiaries after the
      Closing Date.

            (v) Except as otherwise specified in clause (ii) of this Section
      8(f), Sellers shall pay 25% of any insurance recovery with respect to any
      Environmental Losses (net of costs of recovery) to Buyer within 30 days of
      receipt of the recovery amount. In the event Sellers receive any recovery
      from third party insurers relating to Post-Closing Environmental Losses,
      Sellers shall pay 100% of any such insurance recovery to Buyer within 30
      days of receipt of the recovery amount.

            (vi) (A) Notwithstanding anything in this Agreement to the contrary,
      but subject to the provisions of Section 8(f)(ii), the indemnification
      procedures in this Section 8(f)(vi) shall apply to any claim for payment
      or reimbursement under Section 8(f)(iii)(B) with respect to Timely
      Non-Allowable Costs (collectively "Environmental Claims").

                  (B) Any Environmental Claim which is of the nature of a third
      party claim shall also be governed by the procedures set forth in Section
      11(f) hereof, it being understood that any inconsistencies between Section
      11(f) and this Section 8(f)(vi) shall be resolved in favor of the
      provisions set forth in this Section.

                  (C) (1) Buyer shall notify FMC in writing promptly after
            learning of the existence of an Environmental Claim, which notice
            shall describe in reasonable detail the claim, the amount thereof
            (if known and quantifiable), and a reasonably detailed description
            of the facts giving rise to such claim, except that a failure to
            provide prompt notice shall only serve to limit Buyer's
            indemnification rights hereunder to the extent that FMC is
            prejudiced by such failure.

                        (2) Upon assertion by Buyer of a claim covered
            hereunder, FMC shall be entitled (but not obligated) to assume
            Principal Management of the subject matter of such claim. To assume
            Principal Management, FMC must notify Buyer within 30 days of its
            receipt of said notice that it intends to assume Principal
            Management. In the event FMC does not elect to undertake Principal
            Management, Buyer shall assume Principal Management of the subject
            matter of the Environmental Claim.

                        (3) The party not exercising Principal Management with
            respect to a particular matter shall be entitled, at its sole cost
            and expense, to reasonably participate in the management of the
            Environmental Claim. Such participation shall include, without
            limitation: (i) the right to receive copies of all material reports,
            workplans and analytical data submitted to governmental agencies,
            all material notices or other letters or documents received from
            governmental agencies, any other documentation and correspondence
            materially bearing on the Environmental Claim;


                                      -42-
<PAGE>   52
            (ii) the right of reasonable consultation with the party exercising
            Principal Management; and (iii) as to proposed plans of remediation
            to be submitted to governmental agencies, the right of reasonable
            advance review and approval of such plans, which approval shall not
            be unreasonably withheld or delayed.

                        (4) In the event it undertakes Principal Management of
            any matter, FMC shall, upon reasonable notice to Buyer, have
            reasonable access to the relevant subject facility of Buyer and/or
            UDLP.

                        (5) The party undertaking Principal Management hereunder
            for any matter shall manage the matter in good faith and in a
            responsible manner, and any activities conducted in connection
            therewith shall be undertaken promptly and completed reasonably
            expeditiously and in a cost effective manner using commercially
            reasonable efforts. The parties agree to reasonably cooperate with
            one another in connection with addressing any matter hereunder.

                        (6) Any remedial or corrective action covered hereunder
            shall be deemed to have been adequately completed to the extent that
            it attains compliance in a cost effective manner with applicable
            Environmental Requirements or is completed to the satisfaction of an
            appropriate governmental body.

                        (7) For purposes of this Agreement, the term "Principal
            Management" means the authority to principally direct the handling
            of the subject matter of an environmental matter, including, without
            limitation, (1) selection of consultants, contractors, experts or
            advisors, (2) evaluation, selection and implementation of remedial
            measures and (3) negotiations with or challenges to any governmental
            body and third parties.

            (g)   Written Materials and Records.

            (i) After the Closing, Buyer may use and distribute products,
      shipping materials, purchase orders, invoices, sales, promotional or other
      forms and literature which bear the name "FMC" or "Harsco" or the "FMC" or
      "Harsco" design trademark if Buyer attaches a sticker or name plate
      previously approved by FMC or Harsco, as applicable, which discloses the
      acquisition of UDLP by Buyer. The right granted in the immediately
      preceding sentence shall terminate, in the case of inventory of UDLP
      existing as of the Closing Date, on the earlier of date when Buyer has
      sold all of such inventory and the one year anniversary of the Closing
      Date. In addition, such right shall terminate, in the case of shipping
      materials, purchase orders, invoices, sales, promotional or other forms
      and literature, 180 days following the Closing Date. Once such right has
      terminated, Buyer shall deliver or cause to be delivered to each Seller,
      as applicable, or destroy or cause to be destroyed (with a certification
      of such destruction), all of such items bearing the name "FMC" or "Harsco"
      or the "FMC" or "Harsco" design trademark and Buyer further agrees that it
      shall, and shall


                                      -43-
<PAGE>   53
      cause UDLP to, cease to use or display names or materials bearing the name
      "FMC" or "Harsco" or the "FMC" or "Harsco" design trademark or any variant
      thereof or name confusingly similar thereto or to any name or trademark
      retained by FMC Corporation or Harsco. Notwithstanding the foregoing,
      Buyer will (i) remove all signs bearing the name "FMC" or "Harsco" or the
      "FMC" or "Harsco" design trademark from the Properties within six months
      following the Closing Date and (ii) use commercially reasonable efforts to
      cause the Foreign Affiliates to cease, as soon after the Closing as
      possible, using the name "FMC" or the "FMC" design trademark in connection
      with their respective business operations and as part of their respective
      corporate names (it being understood that the Foreign Affiliates may
      continue to use such names and design trademarks in accordance with the
      foregoing, but in any event for no longer than three years after the
      Closing Date; provided that, if required to continue to use the name under
      existing contracts, such three year period shall not apply).

            (ii) Buyer and Sellers agree that Sellers may maintain copies of any
      books and records of and other financial, tax, personnel and operations
      data relating to the Business (collectively, the "Records") and, within
      six months following the Closing Date, FMC may prepare a comprehensive
      index and file plan of such Records reasonably acceptable to Buyer (the
      "File Plan"). Buyer agrees to maintain such Records in a manner consistent
      with the File Plan for a period of not less than ten years from the
      Closing Date (plus any additional time during which a party has been
      advised that there is an ongoing legal proceeding or investigation or tax
      audit with respect to periods prior to the Closing Date, or such period is
      otherwise open to assessment). During such period, Buyer agrees to give
      Sellers and their representatives reasonable cooperation, access
      (including copies) and staff assistance, as needed, during normal business
      hours and upon reasonable notice, with respect to the Records, and Sellers
      agree to give Buyer and its representatives reasonable cooperation, access
      and staff assistance, as needed, during normal business hours and upon
      reasonable notice, with respect to the books and records and other
      financial data relating to the Business as may be necessary for general
      business purposes, including the preparation of tax returns and financial
      statements, the management and handling of tax audits and any closing out
      of outstanding contracts; provided, however, that such cooperation, access
      and assistance does not unreasonably disrupt the normal operations of
      Buyer or Sellers. Buyer shall not destroy or otherwise dispose of the
      Records for the period set forth in the second sentence of this clause
      (ii) without the written consent of Sellers. Each party shall be entitled
      to reimbursement for its reasonable out-of-pocket costs in connection with
      the provision of such access.

            (h) Transferred Employees and Employee Benefits.

            (i) Effective on the Closing Date, Buyer shall cause UDLP to offer
      employment to each person designated on Schedule 8(h)(i) attached hereto
      with salary and wages and with employee benefits that are substantially
      comparable in the aggregate to those provided to such persons by FMC
      immediately prior to the date of such offer, and Buyer shall cause


                                      -44-
<PAGE>   54
      UDLP to, and UDLP shall, employ on such terms each such person who accepts
      such offer (such employees being referred to herein collectively as the
      "Transferred Employees"). The Transferred Employees shall include, in
      addition to those actively at work who accept such offer, all employees on
      leaves of absence, including those on long-term or short-term disability
      or on lay-off which accept such offer. Upon the hiring of the Transferred
      Employees by UDLP, Buyer shall cause UDLP to, and UDLP shall, (i) for
      benefit accrual purposes, recognize all service of such employees
      recognized by FMC (including predecessor employer service) under all
      employee benefit plans, programs and policies of UDLP at its value under
      such plans, programs and policies as of the Closing Date and (ii)
      recognize all service of such employees recognized by FMC (including
      predecessor employer service) for all other purposes (excluding benefit
      accrual) under all employee benefit plans, programs and policies of UDLP.
      The employees listed on Schedule 8(h)(i) as retained employees (the
      "Retained Employees") currently perform substantial services for FMC and,
      accordingly, will be employed after the Closing by FMC and will not be
      deemed to be Transferred Employees or UDLP Employees for purposes of this
      Agreement. From and after the Closing Date and until such time as agreed
      upon by Buyer and FMC, Buyer will permit such Retained Employees to
      continue to have access to UDLP's facilities, including without limitation
      office space, telecommunications and computer equipment, and FMC will
      reimburse Buyer or UDLP (in an amount to be agreed upon by FMC and Buyer)
      for costs incurred by UDLP in providing such access.

                  (ii) (A) With respect to the Transferred Employees, effective
                 as of the Closing Date, Buyer shall cause UDLP to waive
                 pre-existing condition exclusions, evidence of insurability
                 provisions, waiting period requirements or similar provisions
                 under the UDLP health, dental, disability, accidental death and
                 dismemberment and life insurance plans to the extent such
                 exclusions, requirements and provisions had been waived or
                 satisfied under the FMC Employee Benefit Plans as of the
                 Closing Date. In addition, Buyer shall cause the UDLP health
                 and dental plans to credit the Transferred Employees with
                 amounts credited under the FMC health and dental plans toward
                 the satisfaction of annual deductible and out-of-pocket
                 maximums under the UDLP plans during the calendar year which
                 includes the Closing Date. FMC agrees to provide to Buyer
                 within 30 days after the Closing Date such participation,
                 coverage and benefits information requested by Buyer in
                 connection with the foregoing.

                  (B) FMC and its benefit plans shall assume, pay, perform and
                 discharge when due all obligations of UDLP with respect to the
                 Retained Employees (other than obligations with respect to
                 benefits accrued on or prior to the Closing Date, if any, under
                 UDLP Employee Benefit Plans) and shall retain all liability and
                 be responsible for all obligations of FMC and the FMC Employee
                 Benefit Plans with respect to the Retained Employees and any
                 FMC employee who refuses an offer of employment from Buyer as
                 specified in Section 8(h)(i).


                                      -45-
<PAGE>   55
            (iii) Prior to the Closing Date (if practicable), but in any event
      not later than December 30, 1997, FMC shall cause to be transferred from
      the FMC Corporation Salaried Employees' Retirement Plan (the "FMC Salaried
      Plan") to a new pension plan adopted by FMC that will be intended to be
      qualified under Code Section 401(a) and that will mirror the terms of the
      FMC Salaried Plan applicable to UDLP employees and former employees as of
      the date of transfer (the "Defense Segment Plan") assets equal to the
      benefits accrued under the FMC Salaried Plan as of the Closing Date
      (determined in accordance with the actuarial assumptions and methods set
      forth in Schedule 8(h)(iii) but in no event greater than the amount
      permitted to be transferred under Section 414(l) of the Code and the
      regulations thereunder) by all participants in the FMC Salaried Plan who
      were associated with the FMC defense business prior to January 1, 1994,
      and/or who are or were employed by UDLP. In addition, on or before
      December 31, 1997, FMC shall contribute to the Defense Segment Plan any
      amounts required by the Department of Defense to satisfy the applicable
      provisions of Cost Accounting Standard ("CAS") 413 and any other CAS or
      Federal Acquisition Regulation provisions which are applicable. The assets
      of the Defense Segment Plan shall continue to be held by and invested
      under the FMC Master Trust and may be invested as permitted pursuant to
      the terms of such plan and the FMC Master Trust. Effective on the Closing
      Date, Buyer shall become the sponsor of the Defense Segment Plan and
      assume all liabilities associated therewith, and, as soon as possible
      following the Closing Date, FMC shall cause all of the assets associated
      with the Defense Segment Plan to be transferred from the FMC Master Trust
      to a pension trust designated by Buyer. Notwithstanding the above, if it
      is not possible by the Closing Date to finalize the amount of assets to be
      transferred from the FMC Salaried Plan to the Defense Segment Plan or to
      finalize such other amount to be contributed by FMC, then, no later than
      the Closing Date, FMC shall cause to be transferred from the FMC Salaried
      Plan and contributed by FMC to the Defense Segment Plan a substantial
      portion of such assets and contributions and, as soon as possible after
      the Closing Date, but in no event later than September 15, 1998, FMC shall
      cause to be transferred from the FMC Salaried Plan and/or contribute to
      the Defense Segment Plan the amounts necessary to complete the transfer
      (which, in the case of the transfer of assets from the FMC Salaried Plan,
      shall include earnings attributable to such additional amount from the
      first transfer date to the date of final transfer, and in the case of
      contributions from FMC shall include earnings attributable to such amount
      from the first transfer date to the date of final transfer). In addition,
      as soon as possible following the Closing Date, FMC shall cause to be
      transferred from the FMC Salaried Plan to the Defense Segment Plan (or
      such other pension plan for UDLP Employees so designated by Buyer) assets
      equal to the benefits accrued under the FMC Salaried Plan as of the
      Closing Date (determined in accordance with the actuarial assumptions and
      methods set forth on Schedule 8(h)(iii) but in no event greater than the
      amount permitted to be transferred under Section 414(l) of the Code and
      the regulations thereunder) by the Transferred Employees plus earnings
      attributable to such assets from the Closing Date to the date of transfer
      and minus benefit payments made with respect to any Transferred Employee.
      The calculation of the benefit and asset transfer amounts contemplated by
      this Section 8(h)(iii) shall be first made by FMC's actuary. Buyer's
      actuary shall be provided with sufficient data to replicate such
      calculation prior to the actual date of


                                      -46-
<PAGE>   56
      transfer. Any disputes regarding the correctness of these calculations or
      FMC's compliance with this Section 8(h)(iii) shall be resolved in
      accordance with Section 29 of this Agreement. No later than 60 days
      following the Closing Date, FMC and Buyer shall cooperate to file any
      necessary governmental forms with respect to the above-described transfer
      of assets and liabilities. Following the completion of each such transfer
      of assets and liabilities, the appropriate UDLP plan other than the San
      Jose Plan shall assume all liability for such liabilities as of the
      Closing Date. Notwithstanding the above, FMC shall retain all liabilities
      under the FMC Salaried Plan which are funded pursuant to group annuity
      contracts issued by Aetna and The Prudential Insurance Company of America
      and will retain such insurance contracts. Prior to the Closing Date, FMC
      shall cause UDLP to spin off from the FMC Corporation Retirement Plan for
      Hourly Employees -- San Jose (the "San Jose Plan") into an appropriate FMC
      pension plan, the assets and liabilities of the "commercial segment"
      thereof. The participants covered by the "commercial segment" are those
      participants who are not currently and were not previously employed by
      UDLP or FMC in the defense business (other than employees of FMC's
      Corporate Technology Center). Prior to the Closing Date and prior to the
      date FMC causes UDLP to transfer such assets and liabilities, FMC's
      actuary and Buyer's actuary shall agree on such amount to be transferred
      by UDLP using reasonable, agreed actuarial and accounting methods and
      assumptions. Also, if the U.S. Department of Defense concludes, either
      before or after the Closing Date, that any portion of the assets so
      transferred by UDLP should not have been transferred, FMC shall return
      such amount to the San Jose Plan with appropriate interest thereon.

            (iv) Effective on the Closing Date, the Transferred Employees shall
      be eligible to participate in the United Defense Limited Partnership
      Salaried Employees' Plan (the "UDLP Thrift Plan") in accordance with the
      terms of such plan and shall no longer be eligible to make contributions
      under the FMC Employees' Thrift and Stock Purchase Plan (the "FMC Thrift
      Plan"). As soon as possible following the Closing Date, the UDLP Thrift
      Plan shall accept a direct trust-to-trust transfer from the FMC Thrift
      Plan of cash and other property (including FMC common stock) equal to the
      total account balances with respect to the Transferred Employees. Prior to
      such transfer of assets, UDLP shall provide to FMC an opinion letter of
      outside counsel to Buyer that such counsel knows of no reason why the
      current favorable determination letter issued by the Internal Revenue
      Service with respect to the UDLP Thrift Plan should be revoked solely as a
      result of changes made or actions taken by UDLP or Buyer on or after the
      Closing Date. Following such transfer of account balances, the UDLP Thrift
      Plan shall assume all liability for benefits with respect to the amounts
      transferred from the FMC Thrift Plan.

            (v) For a period of one year following the Closing Date, Buyer
      agrees, and agrees to cause UDLP or its successor to the Business, (I) to
      provide to employees of UDLP employed as of the Closing Date (including
      the Transferred Employees) (the "UDLP Employees") salaries, wages and
      employee and retirement benefits that are substantially comparable in the
      aggregate as those provided to such employees immediately prior to the
      Closing Date and (II) to provide to or on behalf of former employees of
      UDLP or of any


                                      -47-
<PAGE>   57
      predecessor employer retiree medical insurance, retiree life insurance and
      any other retiree benefits that are substantially the same as those
      provided by UDLP or FMC to or on behalf of such former employees as of the
      Closing Date. Buyer shall cause UDLP to retain and discharge all
      liabilities with respect to current or former UDLP Employees (including
      current or former FMC and Harsco employees whose liabilities were assumed
      by UDLP) assumed by UDLP upon its formation. Notwithstanding the
      foregoing, nothing in this clause (v) or elsewhere in this Agreement shall
      be deemed to restrict or otherwise prevent or prohibit Buyer or UDLP from
      terminating after the Closing Date any UDLP Employees, to the extent
      permitted by applicable law and applicable collective bargaining or other
      employment-related agreements. If within one year following the Closing
      Date Buyer or UDLP either terminates (other than for Cause) any such UDLP
      Employee or subjects any such UDLP Employee to an indefinite lay-off,
      Buyer shall pay to such UDLP Employee severance pay in an amount equal to
      the greater of (A) the amount that would have been due such UDLP Employee
      under the UDLP severance pay plan attached hereto as Schedule 8(h)(v) if
      such UDLP Employee was terminated by UDLP and (B) the amount due such UDLP
      Employee under the Buyer severance pay plan applicable to such UDLP
      Employee. Buyer shall recognize, for all purposes of any such severance
      plan and any other employee benefit plan applicable to any such UDLP
      Employee, the service of such UDLP Employee with any of the Sellers, UDLP
      or other Affiliates of either Seller prior to the Closing Date to the
      extent recognized by similar plans of UDLP or FMC, as applicable, prior to
      the Closing Date, provided that for benefit accrual purposes Buyer shall
      recognize such service only at its value under such plans as of the
      Closing Date. For purposes of calculating the pension payable with respect
      to a UDLP Employee entitled to the severance described above, the early
      commencement reduction factor shall be applied assuming the termination of
      employment was "in connection with a permanent reduction in force" within
      the meaning of the UDLP pension plan. For purposes of this Section 8(h),
      the term "Cause" shall mean (A) any material failure by a UDLP Employee to
      perform his or her duties or any material failure by a UDLP Employee to
      obey policy directives from his or her supervisor, (B) the commission by a
      UDLP Employee of an act of fraud, misappropriation, embezzlement or any
      other act involving moral turpitude or constituting a felony or (C) the
      commission by a UDLP Employee of any act of dishonesty which injures Buyer
      or UDLP.

            (vi) As soon as practicable following the Closing Date, FMC shall
      cause to be transferred from the FMC master pension and thrift plan trusts
      (the "FMC Master Trusts") to new or existing pension and thrift plan
      trusts maintained by Buyer or UDLP assets held in the FMC Master Trusts
      which relate to the UDLP pension and thrift plans.

            (vii) As soon as practicable following the Closing Date, FMC shall
      cause to be transferred to UDLP, and Buyer shall cause UDLP to assume, the
      FMC Section 501(c)(9) benefit trusts for hourly employees, and FMC shall
      cause to be transferred to a new or existing Section 501(c)(9) benefit
      trust maintained by UDLP or Buyer assets from the FMC Section 501(c)(9)
      benefit trust for salaried employees equal to the portion of the assets in
      such trust which relate to UDLP retiree medical and life insurance
      benefits.


                                      -48-
<PAGE>   58
            (viii) Except as provided in this subparagraph (viii), it is agreed
      that, following the Closing Date, each Seller will be responsible for, and
      will reimburse UDLP with respect to, all payments made by UDLP after the
      Closing Date to any of such Seller's former employees for workers'
      compensation benefits relating to occurrences prior to January 1, 1994.
      The obligations on the part of each Seller to make such payments shall
      continue for so long as any such payments become due to any former
      employee of such Seller. With respect to any workers' compensation claim
      based upon conditions arising out of facts or circumstances occurring both
      before and after January 1, 1994, the obligations of each Seller shall be
      determined in accordance with applicable governmental regulations
      governing the apportionment of responsibility for workers' compensation
      between predecessor and successor employers. Buyer hereby agrees that
      Buyer and UDLP shall be solely responsible for any workers' compensation
      claim based upon conditions arising out of facts or circumstances
      occurring solely on or after January 1, 1994 and acknowledge and agree
      that in no event shall any Seller be responsible for any such workers'
      compensation claim.

            (ix) Notwithstanding anything to the contrary contained in any
      applicable FMC stock option plan or any applicable stock option agreement,
      FMC and Buyer agree that each Transferred Employee shall have the right to
      exercise any outstanding stock option granted to him under any such plan
      that is vested as of the Closing Date within the earlier of (A) two years
      from the Closing Date and (B) the scheduled expiration date of any such
      option.

            (x) Effective as of the Closing Date, no participant in the UDLP
      Thrift Plan shall be eligible to purchase any additional shares of FMC or
      Harsco common stock under the UDLP Thrift Plan. Effective on the Closing
      Date and for a period of two years following the Closing Date, Buyer shall
      cause the UDLP Thrift Plan to be amended to cause UDLP to allow each
      employee of UDLP to sell all or any portion of the FMC or Harsco common
      stock allocated to such employee's account under the UDLP Thrift Plan. In
      addition, no less than ten business days prior to the expiration of such
      two-year period, Buyer agrees to discuss in good faith with FMC and Harsco
      the repurchase by FMC of any FMC common stock and the repurchase by Harsco
      of any Harsco common stock remaining in the UDLP Thrift Plan.

            (xi) Each UDLP Employee who participated immediately prior to the
      Closing in the FMC 1995 Management Incentive Plan (the "MIP") shall
      receive a BPI Award (as defined below) with respect to the Three-Year
      Period (as defined in the MIP) ending December 31, 1997 and with respect
      to the Three-Year Period (as defined in the MIP) ending December 31, 1998.
      Buyer or UDLP shall pay each such BPI Award that is accrued for on the
      Closing Statement to the applicable UDLP Employee at the time when FMC
      makes payment of the BPI Awards to other participants in the MIP, unless
      such BPI Award has previously been paid to such UDLP Employee. For
      purposes of this Agreement, the term "BPI Award" shall mean a Three-Year
      Incentive Award within the meaning of the MIP. In addition, each UDLP
      Employee who participated immediately prior to the Closing in the MIP
      shall receive an annual performance incentive award with respect to the
      calendar year ending December 31, 1997. Buyer or UDLP shall pay each such
      annual performance


                                      -49-
<PAGE>   59
      incentive award that is accrued for on the Closing Statement to the
      applicable UDLP Employee at the time when FMC makes payment of the annual
      performance incentive awards to other participants in the MIP, unless such
      award has previously been paid to such UDLP Employee.

            (xii) As of the Closing, FMC shall pay to each UDLP Employee the
      amounts due and payable to such UDLP Employee as incentive payments under
      any UDLP letter agreement applicable to such UDLP Employee as described on
      Schedule 8(h)(xii) hereto. At the Closing, UDLP shall pay to FMC an amount
      in cash equal to the aggregate amount of all such incentive payments so
      made by FMC and such payment shall reduce the cash of UDLP or be reflected
      as a liability of UDLP on the Closing Statement for the purposes of
      determining the Adjusted Net Worth Amount as of the Closing Date. In
      addition, after the Closing, Buyer shall pay to each UDLP Employee the
      amounts due and payable to such UDLP Employee as severance payments under
      any UDLP letter agreement applicable to such UDLP Employee as described on
      Schedule 8(h)(xii) hereto with respect to any such UDLP Employee
      terminated after Closing.

            (xiii) Without limitation to the provisions of Section 11 and in
      addition thereto, each Seller shall indemnify Buyer, its Affiliates and
      each of its officers, directors and employees and hold them harmless from
      any Losses suffered or incurred by any such indemnified party to the
      extent arising from (i) any failure of the benefit formula in effect as of
      the date hereof under the United Defense CSD Salaried Employees Pension
      Plan to comply with the requirements of ERISA or the Code, (ii) the
      matters relating to the exceptions to the representations and warranties
      of Sellers set forth on Schedule 4C(k) (other than those exceptions
      identified on Schedule 4C(k) as not subject to this subparagraph) and
      (iii) Federal labor law or any collective bargaining agreement by reason
      of the transfer of assets and liabilities of the "commercial segment" of
      the San Jose Plan described in Section 8(h)(iii). The indemnification
      obligations of Sellers pursuant to this Section 8(h)(xiii) shall not be
      subject to any limitations imposed on the indemnification obligations of
      Sellers set forth in Section 11 hereof.

            (i) Mutual Release. Except as otherwise specifically set forth
herein or on Schedule 7(f) hereto, effective as of the Closing:

            (i) Buyer and UDLP hereby unconditionally and irrevocably release
      and discharge each Seller and its respective Affiliates, successors,
      assigns, directors, officers, partners, members, employees and
      representatives (collectively, the "Seller Released Parties") from and
      against any and all actions, causes of action, suits, debts, dues, sums of
      money, accounts, reckonings, liabilities, covenants, contracts,
      controversies, agreements, promises, damages, judgments, claims and
      demands of whatever nature that Buyer or UDLP or their respective
      Affiliates, successors, assigns, directors, officers, partners, members,
      employees and representatives (collectively, the "Buyer Released Parties")
      ever had, now have or hereafter may or shall have that arise from, are
      related to, connected with or that


                                      -50-
<PAGE>   60
      concern the Participation Agreement among FMC Corporation, Harsco and UDLP
      dated as of January 1, 1994, the Partnership Agreement among such parties
      of even date therewith and the other agreements contemplated thereby.

            (ii) Sellers hereby unconditionally and irrevocably release and
      discharge the Buyer Released Parties from and against any and all actions,
      causes of action, suits, debts, dues, sums of money, accounts, reckonings,
      liabilities, covenants, contracts, controversies, agreements, promises,
      damages, judgments, claims and demands of whatever nature that the Seller
      Released Parties ever had, now have or hereafter may or shall have that
      arise from, are related to, connected with or that concern the
      Participation Agreement among FMC Corporation, Harsco and UDLP dated as of
      January 1, 1994, the Partnership Agreement among such parties of even date
      therewith and the other agreements contemplated thereby.

            (j) Insurance. Buyer acknowledges that Sellers and their respective
Affiliates shall have no responsibility for obtaining any insurance or bearing
any loss, liability, claim, damage or expense relating to the assets, business,
operations, conduct, products and employees (including former employees) of
UDLP, the Subsidiaries or the Foreign Affiliates that relates to or arises out
of occurrences subsequent to the Closing other than as provided herein. Nothing
in this Section 8(j) shall modify the rights or obligations of the parties with
respect to indemnification obligations or the responsibility for losses,
liabilities, damages or expenses that relates to or arises out of occurrences
prior to the Closing which is provided for elsewhere in this Agreement.

            (k) Transition Services Agreement. At the Closing, FMC and Buyer
shall execute and deliver the form of Transition Services Agreement attached
hereto as Exhibit 8(k) (the "Transition Services Agreement"). The parties shall
cooperate in good faith to negotiate and provide prior to Closing each annex to
such agreement. Promptly following the execution of this Agreement,
representatives of FMC and Buyer shall meet to develop a transition plan which
will identify services, service periods and service charges to be provided
pursuant to the Transition Service Agreement and which will, to the extent
practicable, be completed prior to the Closing.

            (l) Technology and Environmental Services Agreement. At the Closing,
FMC and Buyer shall execute and deliver the form of Technology and Environmental
Services Agreement attached hereto as Exhibit 8(l) (the "Technology and
Environmental Services Agreement"). The parties shall cooperate in good faith to
negotiate and provide prior to Closing each annex to such agreement.

            (m) Lease. At the Closing, FMC and UDLP shall execute and deliver
the form of Amended and Restated Lease attached hereto as Exhibit 8(m) (the
"Lease"), pursuant to which UDLP shall lease certain buildings and real property
in Santa Clara County, California owned by FMC, including certain properties
currently leased by UDLP and certain properties used by FMC's Corporate
Technology Center.


                                      -51-
<PAGE>   61
            (n) Intellectual Property Agreements. At the Closing, FMC and UDLP
shall execute and deliver the form of Amended and Restated FMC Intellectual
Property Agreement attached hereto as Exhibit 8(n)-1 (the "FMC Intellectual
Property Agreement") and Harsco and UDLP shall execute and deliver the form of
Amended and Restated Harsco Intellectual Property Agreement attached hereto as
Exhibit 8(n)-2 (the "Harsco Intellectual Property Agreement").

            (o) Intellectual Property Recordations. From and after the Closing,
at the written request of Buyer, FMC or Harsco, as applicable, will cooperate
with Buyer to cause any FMC Transferred IP Rights (as defined in the FMC
Intellectual Property Agreement, dated as of January 1, 1994, by and between FMC
and UDLP) or Harsco Transferred IP Rights (as defined in the Harsco Intellectual
Property Agreement, dated as of January 1, 1994, by and between Harsco and
UDLP), the transfer of ownership to UDLP of which shall not have been, prior to
the Closing Date, officially recorded with appropriate authorities in any
applicable jurisdiction, to be so officially recorded in the name of UDLP, Buyer
or one of Buyer's Affiliates (as instructed in writing by Buyer), the cost of
which will be shared equally by Sellers and Buyer.

            (p) Cash Balance as of the Closing. As of the Closing Date, FMC
shall make a good faith estimate of the aggregate liability of UDLP for all
outstanding checks to be included in accounts payable on the Closing Statement.
Sellers agree that, as of the Closing, UDLP shall have cash or cash equivalents
having an aggregate value equal or greater than such estimated liability for
outstanding checks.

            (q) FNSS Royalty Dispute. To the extent that Sellers have any
liability in respect of the Retained Liability set forth as Item III.4. on
Schedule 7(f), Buyer agrees that the amount of any such liability shall be
reduced by the aggregate amount of royalty payments withheld by FNSS in respect
of periods prior to the Closing Date. Sellers agree that they shall not settle
the FNSS litigation described on Schedule 4C(i) in any manner adverse to UDLP or
Buyer without the consent of Buyer (which consent shall not be unreasonably
withheld).

            9. Further Assurances. From time to time, as and when requested by
any party hereto, any other party hereto shall execute and deliver, or cause to
be executed and delivered, all such documents and instruments and shall take, or
cause to be taken, all such further or other actions (subject to any limitations
set forth in this Agreement), as such other party may reasonably deem necessary
or desirable to consummate the transactions contemplated by this Agreement.

            10. Tax Matters.

            (a) Prior to Closing, Buyer and Sellers will agree to allocate an
amount of the Final Purchase Price to the covenants contained in Section 5(e)
hereof. Buyer and Sellers will allocate the balance of the Final Purchase Price
among the assets of UDLP based on the appraisal obtained by Buyer at Buyer's
expense, subject to Sellers' approval (which approval shall not be unreasonably
withheld). Buyer and Sellers will determine the Income Tax consequences of the
purchase and sale of the Interests and covenants contained in section 5(e) in a
manner consistent with


                                      -52-
<PAGE>   62
such allocation. Each of Buyer, UDLP, the Subsidiaries, the Foreign Affiliates
and Sellers will file all Income Tax Returns (including amended returns and
claims for refund) in a manner consistent with such allocation and this Section
10(a).

            (b) Sellers shall indemnify and hold harmless any Buyer Indemnified
Party from and against all Income Taxes (i) with respect to all periods of UDLP
or the Subsidiaries ending on or prior to the Closing Date and (ii) with respect
to any period of any of UDLP or the Subsidiaries beginning before the Closing
Date and ending after the Closing Date, but only with respect to Income Taxes
attributable to that portion of such period up to and including the Closing Date
(such portion, a "Pre-Closing Partial Period"). Sellers shall indemnify and hold
harmless any Buyer Indemnified Party from and against UDLP's Share of any Taxes
of the Foreign Affiliates (x) with respect to all periods of the Foreign
Affiliates ending on or prior to the Closing Date, (y) with respect to any
Pre-Closing Partial Period of the Foreign Affiliates and (z) attributable to any
breach of the representations contained in Section 4C(l), but only to the extent
that UDLP's Share of such Taxes described in (x), (y) and (z) exceeds the sum of
$4 million (the "Foreign Affiliate Tax Basket") and UDLP's Share of the reserves
or accruals for Income Taxes and Other Taxes, accrued but not payable, reflected
in the Foreign Affiliate Closing Date Balance Sheets. Notwithstanding anything
in this Agreement to the contrary, (i) Sellers shall not be required to
indemnify any Buyer Indemnified Party for Taxes to the extent of the aggregate
reserves therefor taken into account in the preparation of the Closing Balance
Sheet (and in the case of Taxes of any Foreign Affiliate accrued but not payable
that are reflected in the Foreign Affiliate Closing Date Balance Sheets) and
(ii) Sellers shall not be required to indemnify any Buyer Indemnified Party for
any Taxes attributable to a Tax period (or partial Tax period) beginning on or
after the Closing Date. Sellers shall be entitled to any net refunds of Taxes
(including interest thereon) with respect to any Tax period (or partial Tax
period) of any of UDLP and its Subsidiaries ending on or before the Closing
Date, except to the extent such refund arises as the result of a carryback of a
loss or other Tax benefit from a period beginning after the Closing Date, and
any refunds of Taxes attributable to an amount paid by Sellers under this
Section. UDLP's share of any net refunds of Taxes (including interest thereon)
with respect to any Tax period (or partial Tax period) of any Foreign Affiliate
ending on or before the Closing Date (except to the extent such refund arises as
the result of a carryback of a loss or other Tax benefit from a period beginning
after the Closing Date) shall be added to the Foreign Affiliate Tax Basket.

            (c) Buyer shall indemnify and hold harmless each Seller Indemnified
Party from and against all Taxes (i) with respect to all periods of any of UDLP,
its Subsidiaries, and the Foreign Affiliates beginning after the Closing Date,
(ii) with respect to any period of UDLP, its Subsidiaries, and the Foreign
Affiliates beginning before the Closing Date and ending after the Closing Date,
but only with respect to the portion of such period beginning the day after the
Closing Date (such portion, a "Post-Closing Partial Period"), or (iii) payable
as a result of any events occurring on the Closing Date, but after the Closing,
which are outside of the ordinary course of business. Buyer shall be entitled to
all refunds of Taxes with respect to the periods described in clauses (i) and
(ii) above.


                                      -53-
<PAGE>   63
            (d) Any Income Taxes of UDLP or its Subsidiaries or any Taxes of the
Foreign Affiliates for a period including a Pre-Closing Partial Period and a
Post-Closing Partial Period shall be apportioned between such Pre-Closing
Partial Period and such Post-Closing Partial Period, based, in the case of real
and personal property Taxes, on a per diem basis and, in the case of other
Taxes, on the actual activities, taxable income or taxable loss of UDLP or its
Subsidiaries or the Foreign Affiliates, as the case may be, during such
Pre-Closing Partial Period and such Post-Closing Partial Period.

            (e) Sellers and Buyer agree to give prompt notice to each other of
any proposed adjustment to Taxes for periods of UDLP, its Subsidiaries and the
Foreign Affiliates ending on or prior to the Closing Date or any Pre-Closing
Partial Period. Sellers and Buyer shall cooperate with each other in the conduct
of any audit or other proceedings involving UDLP for such periods and each may
participate at its own expense; provided, however, that Sellers shall have the
right to control the conduct of any such audit or proceeding for which Sellers
and Buyer agree that any resulting Tax is or may be covered by the indemnity
provided in this Section 10 or Section 11; provided further that Buyer may elect
to have counsel of its choosing participate on behalf of UDLP in any such
proceeding. Notwithstanding the foregoing, Sellers may not settle or otherwise
resolve any such claim, suit or proceeding which would have a material adverse
effect on Buyer's liability for Taxes after Closing without the consent of
Buyer, which consent shall not be unreasonably withheld.

            (f) Sellers, Buyer and UDLP agree to treat all payments made under
this Section 10, under any other indemnity provision contained in this
Agreement, and in respect of any misrepresentations or breaches of warranties or
covenants as adjustments to the Final Purchase Price for Tax purposes.

            (g) For purposes of this Section 10, all references to Buyer,
Sellers, UDLP, its Subsidiaries and Foreign Affiliates shall include their
respective successors.

            (h) Buyer and Sellers shall each pay one-half of all state, county,
or local sales, excise, value added, use, registration, stamp, or other transfer
Taxes and similar Taxes, levies, charges or fees required to be paid on or as
the result of the transfer of the Interests.

            (i) Filing Responsibility.

            (i) FMC shall prepare and file (or shall cause UDLP to prepare and
      file) all Income Tax Returns for UDLP for any taxable period ending on or
      before the Closing Date and UDLP will pay any Income Taxes owed by UDLP
      with respect to such Income Tax Returns subject to its rights to
      indemnification under Section 10(b).

            (ii) Buyer and UDLP shall, subject to the provisions of Section
      10(h)(iii) and (iv), file all other Tax Returns with respect to the
      Business and the business and operations of the Foreign Affiliates.


                                      -54-
<PAGE>   64
            (iii) With respect to any Income Tax Return of UDLP for taxable
      periods beginning before the Closing Date and ending after the Closing
      Date, Buyer shall cause UDLP to consult with Sellers concerning such Tax
      Return. Buyer shall cause UDLP to provide Sellers a copy of any such
      proposed Tax Return governed by this Section 10(h)(iii) at least 30 days
      prior to the filing of such Tax Return, and Sellers may provide comments
      to UDLP, which comments shall be delivered within 15 days of receiving
      such proposed return from UDLP. Comments shall be subject to the consent
      of UDLP which consent shall not be unreasonably withheld. Any comments for
      which consent has been given or for which consent has been unreasonably
      withheld shall be incorporated into the Tax Returns to which they relate.

            (iv) With respect to any Income Tax Return of UDLP's Subsidiaries or
      any Tax Return of the Foreign Affiliates not described in (i) or (iii)
      that relates to a tax period ending on or before the Closing Date or a tax
      period which includes a Pre-Closing Partial Period, Buyer shall cause
      UDLP, its Subsidiaries or Foreign Affiliates to prepare such Tax Return in
      accordance with past practice and in consultation with Sellers. Buyer
      shall cause UDLP, its Subsidiaries or its Foreign Affiliates to provide
      Sellers with a copy of any such proposed Tax Return governed by this
      Section 10(h)(iv) at least 30 days prior to the filing of such Tax Return,
      and Sellers may provide comments to UDLP, the Subsidiaries or the Foreign
      Affiliates which comments shall be delivered within 15 days of receiving
      such proposed Tax Return. Comments shall be subject to the consent of UDLP
      which consent shall not unreasonably be withheld. Any comments for which
      consent has been given or for which consent has been unreasonably withheld
      shall be incorporated into the Tax Returns to which they relate.

            (j) Cooperation and Exchange of Information and Conduct of Tax
Audits.

            (i) FMC shall prepare and submit to Buyer no later than three months
      after the Closing Date, 1997 blank tax return workpaper packages. Buyer
      shall, and shall cause UDLP to, prepare completely and accurately and
      submit to Sellers within three months of receipt, all information as FMC
      shall reasonably request in such tax return workpaper packages.

            (ii) As soon as practicable, but in any event within 30 days after
      FMC's request, from and after the Closing Date, Buyer shall provide
      Sellers with such cooperation and shall deliver to Sellers such
      information and data concerning the pre-Closing operations of UDLP, the
      Subsidiaries and the Foreign Affiliates and make available such
      knowledgeable employees of UDLP, the Subsidiaries and the Foreign
      Affiliates as FMC may request, including providing the information and
      data required by Sellers' customary tax and accounting questionnaires, in
      order to enable Sellers to complete and file all Tax Returns which they
      may be required to file with respect to the income of UDLP through the
      Closing Date or to respond to audits by any taxing authorities with
      respect to the income of UDLP and to otherwise enable Sellers to satisfy
      their internal accounting, tax and other legitimate


                                      -55-
<PAGE>   65
      requirements. Such cooperation and information shall include without
      limitation provision of powers of attorney for the purpose of signing Tax
      Returns and defending audits and promptly forwarding copies of appropriate
      notices and forms of other communications received from or sent to any
      Taxing Authority which relate to UDLP, the Subsidiaries or the Foreign
      Affiliates, and providing copies of all relevant Tax Returns, together
      with accompanying schedules and related workpapers, documents relating to
      rulings or other determinations by any Taxing Authority and records
      concerning the ownership and tax basis of property, which Buyer, UDLP, the
      Subsidiaries or the Foreign Affiliates may possess. Buyer and UDLP shall
      make their respective employees and facilities (and the employees and
      facilities of the Subsidiaries and the Foreign Affiliates) available on a
      mutually convenient basis to provide explanation of any documents or
      information provided hereunder. Sellers shall provide similar cooperation
      to Buyer or UDLP on Buyer's or UDLP's request with respect to post-Closing
      Tax matters.

            (iii) For a period of ten (10) years after the Closing Date, Buyer
      shall, and shall cause UDLP, the Subsidiaries and the Foreign Affiliates
      to, retain all Tax Returns, books and records (including computer files)
      of, or with respect to the activities of, UDLP, the Subsidiaries, the
      Foreign Affiliates or the Business for all taxable periods ending on or
      prior to the Closing Date. Thereafter, Buyer shall not dispose of any such
      Tax Returns, books or records unless it first offers in writing such Tax
      Returns, books and records to FMC and FMC fails to accept such offer
      within sixty (60) days of its being made.

            (iv) FMC shall continue to be the tax matters partner of UDLP as set
      forth in Section 10.8 of the Partnership Agreement between FMC and Harsco,
      dated as of January 1, 1994, for any taxable periods with respect to
      Income Taxes ending on or before the Closing Date.

            (k) Section 754 Election. Sellers shall make a valid election under
Section 754 of the Code, and under any other similar state or local Tax Law, in
the applicable Tax Returns of UDLP to be filed by Sellers. Buyer shall
reasonably cooperate with Sellers in making such elections.

            (l) Notwithstanding anything in this agreement to the contrary, all
claims for indemnity with respect to Taxes of any Foreign Affiliate shall be
made solely under Section 10(b).

            (m) Definitions. For purposes of this Section 10, the following
terms shall have the meanings ascribed to them below:

            (i) "Code" means the Internal Revenue Code of 1986, as amended.

            (ii) "Foreign Affiliate Closing Balance Sheet" shall mean each
      Foreign Affiliate's balance sheet as of the Closing Date, stated in United
      States dollars and prepared in accordance with United States generally
      accepted accounting principles in a manner


                                      -56-
<PAGE>   66
      consistent with such Foreign Affiliate's June 30, 1997 balance sheet.
      Copies of both Foreign Affiliates' June 30, 1997 balance sheets are
      attached as Exhibit 10(m).

            (iii) "Income Taxes" means federal, state, local, or foreign income
      or franchise Taxes or other Taxes imposed on or measured by income,
      together with interest or penalties imposed with respect thereto.

            (iv) "Income Tax Returns" means federal, state, local, or foreign
      Tax Returns required to be filed with any Taxing Authority with respect to
      Income Taxes.

            (v) "IRS" means the U.S. Internal Revenue Service.

            (vi) "Other Taxes" means all Taxes which are not Income Taxes.

            (vii) "Tax" or "Taxes" means all federal, state, local, or foreign
      income, gross receipts, estimated, alternative minimum, add-on minimum,
      profits, sales, use, occupation, value added, ad valorem, transfer,
      registration, franchise, employee or other withholding, payroll,
      unemployment, excise, license, property, or other tax, of any kind
      whatsoever, together with any interest, penalties, or additions to tax
      imposed with respect thereto.

            (viii) "Tax Laws" means the Code and any federal, state, local, or
      foreign laws relating to Taxes and any regulations or official
      administrative pronouncements released thereunder.

            (ix) "Tax Returns" means returns, amended returns, declarations,
      reports, claims for refund, information returns, or other documents
      (including any related or supporting schedules, statements, or
      information) filed or required to be filed in connection with the
      determination, assessment or collection of Taxes of any party or the
      administration of any laws, regulations, or administrative requirements
      relating to any Taxes.

            (x) "Taxing Authority" means any governmental authority, domestic or
      foreign, having jurisdiction over the assessment, determination,
      collection, or other imposition of Tax.

            (xi) "UDLP's Share" with respect to Taxes, Tax accruals and
      reserves, or Tax refunds of a Foreign Affiliate shall mean the product of
      (a) the amount of such Taxes, Tax accruals and reserves, or Tax refunds as
      the case may be and (b) the percentage of common equity interests in such
      Foreign Affiliate owned directly or indirectly by UDLP as of the Closing
      Date.


                                      -57-
<PAGE>   67
            11. Indemnification.

            (a) Indemnification by Sellers. Each Seller shall indemnify Buyer,
UDLP and their respective Affiliates and each of their respective officers,
directors and employees (collectively, "Buyer Indemnified Parties") and defend
and hold them harmless from any loss, liability, cost, damage or expense
(including reasonable legal fees and expenses) but excluding punitive damages
(except to the extent awarded to third parties as a result of a third party
claim) ("Losses") suffered or incurred by any such indemnified party to the
extent directly attributable to (i) any breach or inaccuracy of any
representation or warranty of Sellers contained in this Agreement or the
Ancillary Agreements as of the date hereof or as of the Closing Date (after
giving effect to the supplement to the Schedules permitted under Section 24
hereof), to the extent such Seller is a party thereto, (other than any
representation or warranty contained in Section 4C(n)), (ii) any breach of any
covenant of Sellers contained in this Agreement or the Ancillary Agreements, to
the extent such Seller is a party thereto, (iii) any Retained Liability and (iv)
except as provided in Section 8(h), any liability with respect to any employee
benefit plan (other than the Defense Segment Plan) sponsored, maintained or
contributed to by FMC or any ERISA Affiliate thereof (defined as any member of
the FMC controlled group of companies as defined in Section 414(b), (c), (m) or
(o) of the Code) other than UDLP and its Subsidiaries; provided however, that
with respect to (A) any breach by FMC of any representation or warranty of FMC
contained in Section 4A and (B) any breach of FMC of any covenant contained in
Sections 5(c), 5(e) and 8(b), FMC only (and not Harsco) shall so indemnify
Buyer, its Affiliates and each of its officers, directors and employees, and,
with respect to (X) any breach by Harsco of any representation or warranty of
Harsco contained in Section 4B and (Y) any breach by Harsco of any covenant
contained in Section 5(c), 5(e) and 8(b), Harsco only (and not FMC), shall so
indemnify Buyer, its Affiliates and each of its officers, directors and
employees; provided, further, that Sellers shall not have any liability under
clause (i) above unless the aggregate of all Losses relating thereto for which
Sellers would, but for this proviso, be liable exceeds on a cumulative basis an
amount equal to $10,000,000, and then only to the extent of any such excess;
provided further, that Sellers shall not have any liability under clause (i)
above for any individual item where the Loss relating to such item is less than
$25,000 and such items shall not be aggregated for purposes of the first proviso
to this Section 11(a); and provided further, that Sellers' aggregate liability
under clause (i) above shall in no event exceed 10% of the Final Purchase Price.
In no event shall Sellers be liable for any Loss relating to environmental
matters pursuant to this Section 11.

            (b) Exclusive Remedy. Except as otherwise expressly provided in
Sections 5(k), 8(f), 8(h), 10 and 23 and except as provided in any supplemental
agreement executed in connection herewith, each party acknowledges and agrees
that, from and after the Closing, its sole and exclusive remedy with respect to
any and all claims relating to the subject matter of this Agreement, the
Purchase and the Ancillary Agreements shall be pursuant to the indemnification
provisions set forth in this Section 11. In furtherance of the foregoing, each
party hereby waives, from and after the Closing, to the fullest extent permitted
under applicable law, any and all rights, claims and causes of action it may
have against the other parties hereto relating to the subject matter of this
Agreement, the Purchase and the Ancillary Agreements arising under or based upon
any federal, state, local or foreign statute, law, ordinance, rule or regulation
or otherwise, provided, however, that no party


                                      -58-
<PAGE>   68
waives any tort claims it may have against any other party hereto for
intentional fraudulent misrepresentation; and provided further that nothing in
this Section 11(b) shall affect any rights or remedies that the Sellers may have
with respect to each other.

            (c) Indemnification by Buyer. Buyer shall indemnify Sellers, their
Affiliates and their respective officers, directors and employees (collectively,
"Seller Indemnified Parties") against and hold them harmless from any Losses
suffered or incurred by any such indemnified party to the extent directly
attributable to (i) any breach or inaccuracy of any representation or warranty
of Buyer contained in this Agreement or the Ancillary Agreements as of the date
hereof or as of the Closing Date, (ii) any breach of any covenant of Buyer
contained in this Agreement or the Ancillary Agreements contemplated hereby,
(iii) any failure by Buyer or its Affiliates to comply with the provisions of
the Worker Adjustment Retraining and Notification Act of 1988, as amended, or
any similar state or local law or regulation, (iv) any discontinuance,
suspension or modification of any employee benefit plan maintained by Buyer or
UDLP as contemplated by Section 8(h) hereof, (v) subject to Buyer's rights under
Section 11(a), any liability, action, suit, claim or other proceeding which
arises directly or indirectly in connection with Buyer's financing or
refinancing of the Initial Purchase Price or Final Purchase Price, including as
a result of the use of the Financial Statements or other information provided
pursuant to Section 8(e) or otherwise in connection with any such financing or
refinancing or otherwise or (vi) except as otherwise expressly provided in this
Agreement and other than with respect to any Retained Liabilities, all
obligations and liabilities of whatever kind and nature, primary or secondary,
direct or indirect, absolute or contingent, known or unknown, whether or not
accrued, whether arising before, on or after the Closing Date (whether or not
asserted against either Seller in its capacity as a partner of UDLP or
otherwise), of any of UDLP, its Subsidiaries or the Foreign Affiliates,
including, without limitation, any such obligations or liabilities contained in
the Material Contracts or any agreement, lease, license, permit, plan or
commitment that, because it fails to meet the relevant threshold amount or term,
is not included within the definition of Material Contracts; provided however,
that Buyer shall not have any liability under clause (i) above unless the
aggregate of all Losses relating thereto for which Buyer would, but for this
proviso, be liable exceeds on a cumulative basis an amount equal to $10,000,000
and then only to the extent of any such excess; and provided, further, that
Buyer shall not have any liability under clause (i) above for any individual
item where the Loss relating to such item is less than $25,000, and such items
shall not be aggregated for purposes of the first proviso to this Section 11(c).

            (d) Losses Net of Insurance and Tax Benefits. The amount of any and
all Losses indemnified under this Agreement shall be determined net of any
amounts recovered or recoverable by the indemnified party under insurance
policies, indemnities or other reimbursement arrangements with respect to such
Losses. Each party hereby waives, to the extent permitted under its applicable
insurance policies, any subrogation rights that its insurer may have with
respect to any indemnifiable Losses. The amount of any and all Losses
indemnified under this agreement shall be reduced by the present value (computed
using the mid-term applicable federal rate under Code Section 1274, as in effect
on the date hereof) of any Tax benefits realized and to be realized by the
indemnified party with respect to the Loss, and the amount of all Losses shall
be increased by the amount of all additional


                                      -59-
<PAGE>   69
Taxes (if any) payable by an indemnified party in respect of any indemnification
payment made pursuant to this Agreement. Any indemnity payment under this
Agreement shall be treated as an adjustment to the Final Purchase Price for tax
purposes.

            (e) Termination of Indemnification. The obligations to indemnify and
hold harmless a party hereto with respect to any breach of a representation or
warranty of any party hereto contained in Section 4 or 6, shall terminate when
the applicable representation or warranty terminates pursuant to Section 15;
provided, however, that such obligations to indemnify and hold harmless shall
not terminate with respect to any item as to which the person to be indemnified
or the related party thereto shall have, prior to the expiration of the
applicable period, previously made a claim by delivering a written notice
(stating in reasonable detail the nature of, and factual and legal basis for,
any such claim for indemnification, and the provisions of this Agreement upon
which such claim for indemnification is made) to the indemnifying party. The
obligation to indemnify and hold harmless a party hereto pursuant to the other
provisions of Sections 11(a) and 11(c) shall not terminate.

            (f) Procedures Relating to Indemnification.

            (i) In the event that a party (the "indemnified party") is entitled
      to any indemnification provided for under this Agreement in respect of,
      arising out of or involving a claim or demand made by any person, firm,
      governmental authority or corporation against the indemnified party (a
      "Third Party Claim"), such indemnified party must notify the indemnifying
      party in writing, and in reasonable detail, of the Third Party Claim as
      promptly as reasonably possible after receipt by such indemnified party of
      notice of the Third Party Claim; provided, however, that failure to give
      such notification on a timely basis shall not affect the indemnification
      provided hereunder except to the extent the indemnifying party shall have
      been actually prejudiced as a result of such failure; provided, further,
      that any notices to be delivered to Sellers collectively as the
      "indemnifying party" shall be delivered to FMC. Thereafter, the
      indemnified party shall deliver to the indemnifying party, within five
      business days after the indemnified party's receipt thereof, copies of all
      notices and documents (including court papers) received by the indemnified
      party relating to the Third Party Claim.

            (ii) If a Third Party Claim is made against an indemnified party,
      the indemnifying party (FMC if on behalf of Sellers collectively or FMC
      solely, or Harsco on behalf of Harsco solely) shall be entitled to
      participate in the defense thereof and, if it so chooses and acknowledges
      its obligation to indemnify the indemnified party therefor, to assume the
      defense thereof with counsel selected by the indemnifying party (FMC if on
      behalf of Sellers collectively or FMC solely, or Harsco on behalf of
      Harsco solely) and reasonably satisfactory to the indemnified party.
      Notwithstanding any acknowledgment made pursuant to the immediately
      preceding sentence, the indemnifying party shall continue to be entitled
      to assert any limitation on its indemnification responsibility contained
      in the provisos to Section 11(a) or Section 11(c), as the case may be.
      Should the indemnifying party so elect to assume the


                                      -60-
<PAGE>   70
      defense of a Third Party Claim, the indemnifying party shall not be liable
      to the indemnified party for legal expenses subsequently incurred by the
      indemnified party in connection with the defense thereof. If the
      indemnifying party assumes such defense, the indemnified party shall have
      the right to participate in the defense thereof and to employ counsel, at
      its own expense, separate from the counsel employed by the indemnifying
      party, it being understood, however, that the indemnifying party (FMC if
      on behalf of Sellers collectively or FMC solely, or Harsco on behalf of
      Harsco solely) shall control such defense; provided, however, that the
      indemnifying party shall not be permitted to settle or compromise such
      Third Party Claim without the written consent of each indemnified party
      subject to such Third Party Claim (which consent shall not be unreasonably
      withheld) unless (i) the indemnifying party shall pay or cause to be paid
      all amounts arising out of such settlement concurrently with the
      effectiveness thereof, (ii) such settlement is conditioned upon the full
      and complete release of each indemnified party with respect to such Third
      Party Claim and (iii) such settlement shall not restrict the business or
      operations of any indemnified party in any material respect. The
      indemnifying party shall be liable for the fees and expenses of counsel
      employed by the indemnified party for any period during which the
      indemnifying party has not assumed the defense thereof. If the
      indemnifying party chooses to defend any Third Party Claim, all parties
      hereto shall cooperate in the defense or prosecution of such Third Party
      Claim. Such cooperation shall include the retention and (upon the
      indemnifying party's request (FMC if on behalf of Sellers collectively or
      FMC solely, or Harsco on behalf of Harsco solely)) the provision to the
      indemnifying party of records and information which are reasonably
      relevant to such Third Party Claim, and making employees available on a
      mutually convenient basis to provide additional information and
      explanation of any material provided hereunder. In the event that the
      indemnifying party shall have assumed the defense of a Third Party Claim,
      the indemnified party shall not admit any liability with respect to, or
      settle, compromise or discharge, such Third Party Claim without the
      indemnifying party's (FMC's if on behalf of Sellers collectively or FMC
      solely, Harsco's if on behalf of Harsco solely) prior written consent
      (which consent shall not be unreasonably withheld). If the applicable
      indemnifying party does not assume the defense of a Third Party Claim, the
      applicable indemnified parties may defend against such claim in any
      reasonable manner as such indemnified parties may deem appropriate,
      including settling such Third Party Claim on such terms as such
      indemnified parties may deem appropriate without the consent of any
      indemnifying party.

            12. Assignment. Except as set forth below, this Agreement and any
rights and obligations hereunder shall not be assignable or transferable by
Buyer or any Seller without the prior written consent of the other parties and
any purported assignment without such consent shall be void and without effect;
provided, however, that, without the consent of Sellers, (i) Buyer may assign
its right to purchase the Interests hereunder to one or more wholly-owned
subsidiaries of Buyer upon written notice of such assignment to FMC (it being
understood, however, that no such assignment shall limit or otherwise affect
Buyer's obligations hereunder), (ii) Buyer may collaterally assign its rights
under this agreement as security for its obligations to any third party
providing financing in connection with the transactions contemplated hereby and
(iii) after Closing, Buyer may assign its rights under this Agreement to any
person who, directly or indirectly, acquires 50% or more of the


                                      -61-
<PAGE>   71
capital stock of Buyer (by merger, sale of stock or otherwise) or the Interests
or acquires all or any substantial portion of the assets of UDLP (it being
understood that if more than 10% of such person's annual revenues for the latest
fiscal year ended prior to such acquisition were derived from the defense
business, then all of the representations and warranties contained in this
Agreement and the Ancillary Agreements (other than any representation and
warranty contained in Sections 4C(k), 4C(l), 4C(n) and 8(f) of this Agreement)
shall immediately terminate as of the date of such acquisition).

            13. No Third-Party Beneficiaries. This Agreement is for the sole
benefit of the parties hereto and their permitted assigns and nothing herein
express or implied (including Sections 8(f), 8(h) and 11) shall give or be
construed to give to any person or entity, other than the parties hereto and
such permitted assigns, any legal or equitable rights hereunder.

            14. Termination.

            (a) Anything contained herein to the contrary notwithstanding, this
Agreement may be terminated and the transactions contemplated hereby abandoned
at any time prior to the Closing Date:

            (i) by the mutual written consent of Sellers and Buyer;

            (ii) by either Seller if any of the conditions set forth in Section
      3(b) shall have become incapable of fulfillment, and shall not have been
      waived by Seller;

            (iii) by Buyer if any of the conditions set forth in Section 3(a)
      shall have become incapable of fulfillment, and shall not have been waived
      by Buyer; or

            (iv) by either Seller if the Closing does not occur on or prior to
      November 25, 1997; or

            (v) by Buyer if the Closing does not occur on or prior to November
      25, 1997;

provided, however, that the party seeking termination pursuant to clause (ii),
(iii), (iv) or (v) above is not in breach of any of its representations,
warranties, covenants or agreements contained in this Agreement.

            (b) In the event of termination by Sellers or Buyer pursuant to this
Section 14, written notice thereof shall forthwith be given to the other party
and the transactions contemplated by this Agreement shall be terminated, without
further action by any party. If the transactions contemplated by this Agreement
are terminated as provided herein:

            (i) Buyer shall return all documents and copies and other materials
      received from or on behalf of each Seller relating to the transactions
      contemplated hereby, whether so


                                      -62-
<PAGE>   72
      obtained before or after the execution hereof, to such Seller or shall
      destroy all such documents, copies and materials and provide written
      certification of such destruction to such Seller; and

            (ii) all confidential information received by Buyer with respect to
      UDLP, the Subsidiaries, the Foreign Affiliates and the Business shall be
      treated in accordance with the Diligence Confidentiality Agreement, which
      shall remain in full force and effect notwithstanding the termination of
      this Agreement.

            (c) If this Agreement is terminated and the transactions
contemplated hereby are abandoned as described in this Section 14, this
Agreement shall become void and of no further force and effect, except for the
provisions of (i) Section 5(a) relating to indemnification in connection with
access to the Property, (ii) Section 7(a) relating to the obligation of Buyer to
keep confidential certain information and data obtained by it, (iii) Section
8(b) relating to publicity, (iv) Section 16 relating to certain expenses, (v)
Section 23 relating to finder's fees and broker's fees, and (vi) this Section
14. Nothing in this Section 14 shall be deemed to release any party from any
liability for any breach by such party of the terms and provisions of this
Agreement or to impair the right of any party to compel specific performance by
another party of its obligations under this Agreement.

            15. Survival of Representations. The representations and warranties
in this Agreement and in any other document delivered in connection herewith
shall survive the Closing solely for purposes of Sections 11(a) and 11(c) and
shall terminate at the close of business on April 30, 1999; provided, however,
that (i) the representations and warranties set forth in Section 4C(l) and
Section 4C(k) (to the extent relating to the applicable statutes) shall survive
the Closing until 90 days after the expiration of the applicable statute of
limitations and (ii) the representations and warranties set forth in Sections
4A, 4B, 4C(a)(i) and 4C(b) shall survive the Closing without limitation.

            16. Expenses. Whether or not the transactions contemplated hereby
are consummated, and except as otherwise specifically provided in this
Agreement, all costs and expenses incurred in connection with this Agreement and
the transactions contemplated hereby shall be paid by the party incurring such
costs or expenses.

            17. Amendment and Waiver. This Agreement may be amended, or any
provision of this Agreement may be waived; provided, however, that any such
amendment or waiver shall be binding upon a Seller only if set forth in a
writing executed by such Seller and referring specifically to the provision
alleged to have been amended or waived, and any such amendment or waiver shall
be binding upon Buyer only if set forth in a writing executed by Buyer and
referring specifically to the provision alleged to have been amended or waived.
No course of dealing between or among any persons having any interest in this
Agreement shall be deemed effective to modify, amend or discharge any part of
this Agreement or any rights or obligations of any person under or by reason of
this Agreement.


                                      -63-
<PAGE>   73
            18. Notices. All notices or other communications required or
permitted to be given hereunder shall be in writing and shall be delivered by
hand or sent by prepaid telex, cable or telecopy, or sent, postage prepaid, by
registered, certified or express mail, or reputable overnight courier service
and shall be deemed given when so delivered by hand, telexed, cabled or
telecopied, or if mailed, three days after mailing (one business day in the case
of express mail or overnight courier service), as follows:

            (i)   if to Buyer,

                  Iron Horse Acquisition Corp.
                  c/o TC Group, L.L.C.
                  1001 Pennsylvania Avenue, N.W.
                  Suite 220 South
                  Washington, D.C. 20004
                  Telecopy No.:  202-347-9250
                  Attention:  Allan M. Holt

                  with a copy to:

                  Latham & Watkins
                  1001 Pennsylvania Avenue, N.W.
                  Suite 1300
                  Washington, D.C. 20004
                  Telecopy No.:  202-637-2201
                  Attention:  Bruce E. Rosenblum

            (ii)  if to FMC,

                  FMC Corporation
                  200 East Randolph Drive
                  Chicago, Illinois  60601
                  Telecopy No.:  (312) 861-6012
                  Attention:  J. Paul McGrath

                  with a copy to:

                  Kirkland & Ellis
                  200 East Randolph Drive
                  Chicago, Illinois  60601
                  Telecopy No.:  (312) 861-2200
                  Attention:  Glen E. Hess, P.C.


                                      -64-
<PAGE>   74
            (iii) if to Harsco,

                  Harsco Corporation
                  350 Poplar Church Road
                  Camp Hill, PA  17011
                  Telecopy No.:  (717) 763-6402
                  Attention:  Paul C. Coppock

                  with a copy to:

                  Morgan, Lewis & Bockius
                  1800 M Street, N.W.
                  Washington, D.C. 20036
                  Telecopy No.: (202) 467-7176
                  Attention:   Lloyd H. Feller

            19. Interpretation. The headings and captions contained in this
Agreement, in any Exhibit or Schedule hereto and in the table of contents to
this Agreement are for reference purposes only and shall not affect in any way
the meaning or interpretation of this Agreement. Any capitalized terms used in
any Schedule or Exhibit and not otherwise defined therein shall have the
meanings set forth in this Agreement. The use of the word "including" herein
shall mean "including without limitation."

            20. No Strict Construction. Notwithstanding the fact that this
Agreement has been drafted or prepared by one of the parties, each of Buyer and
Sellers confirms that each of them and their respective counsel have reviewed,
negotiated and adopted this Agreement as the joint agreement and understanding
of the parties, and the language used in this Agreement shall be deemed to be
the language chosen by the parties hereto to express their mutual intent, and no
rule of strict construction shall be applied against any person.

            21. Counterparts. This Agreement may be executed in one or more
counterparts (including by means of telecopied signature pages), all of which
shall be considered one and the same agreement, and shall become effective when
one or more such counterparts have been signed by each of the parties and
delivered to the other party.

            22. Entire Agreement. This Agreement and the other agreements
referred to herein (including the Diligence Confidentiality Agreement) or
executed among all of the parties in connection herewith contain the entire
agreement and understanding between the parties hereto with respect to the
subject matter hereof and supersede all prior agreements and understandings,
whether written or oral, relating to such subject matter.

            23. Brokerage. Buyer has not used a broker or finder in connection
with the transactions contemplated by this Agreement, and there are no claims
for brokerage commissions,


                                      -65-
<PAGE>   75
finders' fees or similar compensation in connection with the transactions
contemplated by this Agreement based on any arrangement or agreement by or on
behalf of Buyer, except pursuant to an arrangement with Lehman Brothers, Inc.
for which Buyer is solely responsible. No Seller has retained any broker or
finder or incurred any liability or obligation for any brokerage fees,
commissions or finder's fees with respect to this Agreement or the transactions
contemplated hereby, except pursuant to arrangements with Morgan Stanley & Co.
Incorporated (for which FMC is responsible) and Salomon Brothers Inc (for which
Harsco is responsible). Notwithstanding anything to the contrary in Section 11,
Buyer shall indemnify and hold Sellers harmless for any breach of its
representation in this Section 23, and Sellers shall indemnify and hold Buyer
harmless for any breach of their representation in this Section 23.

            24. Schedules. The Schedules hereto are qualified in their entirety
by reference to the specific provisions of the Agreement and are not intended to
constitute, and shall not be construed as constituting, representations or
warranties of Sellers, except as and to the extent provided in the Agreement.
Inclusion of information in the Schedules hereto shall not be construed as an
admission that such information is material to any of Sellers, the Interests,
the Business and/or UDLP or its Subsidiaries or Foreign Affiliates. Matters
reflected in the following Schedules are not necessarily limited to matters
required by the Agreement to be reflected in the Schedules. Such additional
matters are set forth for informational purposes only and do not necessarily
include other matters of a similar nature. Prior to the Closing, Sellers shall
have the right to supplement, modify or update the Schedules hereto to reflect
changes occurring between the date of this Agreement and the Closing; provided,
however, that any such supplements, modifications or updates shall be subject to
Buyer's rights under Section 3(a)(i). Matters disclosed in any Schedule shall be
deemed to be disclosed in all Schedules in which such matters are appropriate to
be disclosed. Headings have been inserted on Sections of the Schedules for
convenience of reference only and shall to no extent have the effect of amending
or changing the express description of the Sections as set forth in the
Agreement.

            25. Representation by Counsel; Interpretation. Sellers and Buyer
acknowledge that each of them has been represented by counsel in connection with
this Agreement and the transactions contemplated hereby. Accordingly, any rule
of law or any legal decision that would require interpretation of any claimed
ambiguities in this Agreement against the party that drafted it has no
application and is expressly waived.

            26. Severability. Whenever possible, each provision of this
Agreement shall be interpreted in such manner as to be valid and effective under
applicable law, but if any provision of this Agreement or the application of any
such provision to any person or circumstance shall be held invalid, illegal or
unenforceable in any respect by a court of competent jurisdiction, such
invalidity, illegality or unenforceability shall not affect any other provision
hereof.

            27. Governing Law. This Agreement shall be governed by and construed
in accordance with the internal laws of the State of Illinois applicable to
agreements made and to be


                                      -66-
<PAGE>   76
performed entirely within such State, without regard to the conflicts of law
principles of such State, except to the extent otherwise provided on Schedule
29(b) hereto.

            28. Exhibits and Schedules. All Exhibits and Schedules annexed
hereto or referred to herein are hereby incorporated in and made a part of this
Agreement as if set forth in full herein.

            29. Dispute Resolution.

            (a) Negotiation. In the event of any dispute or disagreement between
Sellers and Buyer as to the interpretation of any provision of this Agreement or
any Ancillary Agreement (or the performance of obligations hereunder or
thereunder), the matter, upon written request of any Seller or Buyer, shall be
referred to representatives of the parties for decision, each party being
represented by a senior executive officer (the "Representatives"). The
Representatives shall promptly meet in a good faith effort to resolve the
dispute. If the Representatives do not agree upon a decision within thirty (30)
calendar days after reference of the matter to them, each of Buyer and Sellers
shall be free to exercise the remedies available to them under Section 29(b).

            (b) Arbitration. Any controversy, dispute or claim arising out of or
relating in any way to this Agreement or the Ancillary Agreements or the
transactions arising hereunder or thereunder that cannot be resolved by
negotiation pursuant to Section 29(a), including any controversy, dispute or
claim relating to any alleged breach or violation hereof or thereof by a party
hereto, or the scope, interpretation, validity or termination hereof or thereof,
shall, except as otherwise provided in Section 2(b), be settled exclusively by
arbitration in accordance with and subject to the principles and provisions set
forth on Schedule 29(b) attached hereto.

                        *     *     *     *     *


                                      -67-
<PAGE>   77
            IN WITNESS WHEREOF, the parties have caused this Agreement to be
duly executed as of the date first written above.


                                  FMC CORPORATION

                                  By: /s/ J. Paul McGrath
                                     --------------------------------------
                                     Name: J. Paul McGrath
                                     Title: Senior Vice President




                                  HARSCO CORPORATION

                                  By: /s/ Leonard A. Campanaro
                                     --------------------------------------
                                     Name: Leonard A. Campanaro
                                     Title: Senior Vice President & CFO

                                  HARSCO UDLP CORPORATION

                                  By: /s/ Leonard A. Campanaro
                                     --------------------------------------
                                     Name: Leonard A. Campanaro
                                     Title: Treasurer


                                  IRON HORSE ACQUISITION CORP.

                                  By: /s/ Allan M. Holt 
                                     --------------------------------------
                                     Name: Allan M. Holt        
                                     Title: President


                                      -68-
<PAGE>   78
                                LIST OF EXHIBITS

Exhibit 2(a)(i)   -     Form of Opinion of Buyer's Counsel
Exhibit 2(a)(ii)  -     Form of Opinion of Each Seller's Counsel
Exhibit 6(c)      -     Escrow Agreement
Exhibit 8(k)      -     Transition Services Agreement
Exhibit 8(l)      -     Technology and Environmental Services Agreement
Exhibit 8(m)      -     Lease
Exhibit 8(n)-1    -     FMC Intellectual Property Agreement
Exhibit 8(n)-2    -     Harsco Intellectual Property Agreement
Exhibit 10m       -     Foreign Affiliates' June 30, 1997 Balance Sheets


                                      -69-
<PAGE>   79
                                LIST OF SCHEDULES


Schedule 2(b)        -    Adjustment Principles
Schedule 3(a)(v)     -    Material Adverse Changes
Schedule 4C(a)(ii)   -    Certain Conflicts
Schedule 4C(b)       -    Purchase Rights
Schedule 4C(c)-1     -    Subsidiaries
Schedule 4C(c)-2     -    Foreign Affiliates
Schedule 4C(d)       -    Financial Statements
Schedule 4C(e)       -    Permitted Liens
Schedule 4C(f)-1     -    Owned Real Property
Schedule 4C(f)-2     -    Leased Real Property
Schedule 4C(g)       -    Intellectual Property and Intellectual Property
                            Exceptions
Schedule 4C(h)       -    Material Contracts
Schedule 4C(i)       -    Litigation
Schedule 4C(j)       -    Compliance with Laws
Schedule 4C(k)       -    ERISA Exceptions
Schedule 4C(k)-1     -    UDLP Employee Benefit Plans
Schedule 4C(k)-2     -    FMC Employee Benefit Plans
Schedule 4C(l)       -    Taxes
Schedule 4C(m)       -    Insurance Policies
Schedule 4C(n)       -    Environmental Compliance
Schedule 4C(o)       -    Undisclosed Liabilities
Schedule 4C(p)       -    Subsequent Events
Schedule 4C(q)       -    Government Contracts
Schedule 4C(r)       -    Labor Relations
Schedule 4C(u)-1     -    Loss Contracts
Schedule 4C(u)-2     -    Backlog
Schedule 4C(v)       -    Customers, Distributors and Suppliers
Schedule 4C(w)       -    Dividends by Foreign Affiliates
Schedule 5(b)        -    Permitted Conduct
Schedule 5(e)        -    Employees Not To Be Solicited
Schedule 5(g)        -    FMC Resource Transfer
Schedule 6(c)        -    Commitment Letters
Schedule 7(e)        -    Guaranties
Schedule 7(f)        -    Retained Assets and Liabilities
Schedule 8(f)(ii)    -    Remediation Reports
Schedule 8(h)(i)     -    Transferred Employees
Schedule 8(h)(iii)   -    Actuarial Assumptions and Methods
Schedule 8(h)(v)     -    UDLP Severance Plan
Schedule 8(h)(xii)   -    Incentive Payments and Severance Payments
Schedule 29(b)       -    Arbitration Principles


                                     -70-


<PAGE>   1
                SUPPLEMENTAL AGREEMENT NO.1 TO PURCHASE AGREEMENT

                  THIS SUPPLEMENTAL AGREEMENT NO. 1 TO PURCHASE AGREEMENT (this
"Agreement"), dated as of August 25, 1997, is entered into by and among FMC
Corporation, a Delaware corporation, Harsco Corporation, a Delaware corporation,
Harsco UDLP Corporation, a Pennsylvania business corporation (together with FMC
Corporation and Harsco Corporation, "Sellers"), and Iron Horse Acquisition
Corp., a Delaware corporation ("Buyer"). Capitalized terms used and not
otherwise defined in Section 6 below or otherwise herein have the meaning
ascribed to such terms in the Purchase Agreement (as defined below).

                  WHEREAS, Sellers and Buyer are parties to a Purchase Agreement
(the "Purchase Agreement"), dated as of the date hereof;

                  * * *(1)

                  WHEREAS, Sellers and Buyer intend this Agreement to supplement
and modify the terms of the Purchase Agreement.

                  NOW, THEREFORE, in consideration of the mutual covenants
contained herein and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties to this Agreement
hereby agree as follows:

                  1. Modification of the Initial Purchase Price. Pursuant to
Section 1(b) of the Purchase Agreement, the Initial Purchase Price is
$850,000,000 payable in immediately available funds at the Closing.
Notwithstanding the terms of Section 1(b) of the Purchase Agreement, and any
other provision of the Purchase Agreement to the contrary, Sellers and Buyer
hereby agree that unless * * * the Initial Purchase Price shall be modified to
consist of (i) $800,000,000 payable in immediately available funds at the
Closing and (ii) a note in the aggregate principal amount of $50,000,000, in
form and substance reasonably satisfactory to Sellers and Buyer, containing the
terms and conditions specified on Exhibit A hereto (the "Special Note")
deliverable to Sellers at the Closing.

                  2. Mandatory Prepayment of Special Note. Upon the first to
occur of any of the following events, the aggregate principal amount outstanding
under the Special Note and all accrued and unpaid interest thereon will become
immediately due and payable, subject to the rights of set-off in Section 3:

                  (a) * * *

- --------

    (1) Omitted text indicated herein by three asterisks (* * *) is the subject
of a Confidential Treatment Request filed with the Securities and Exchange
Commission (the "Commission"). The text for which confidential treatment has
been requested has been filed separately with the Commission.
<PAGE>   2
                  (b) the consummation of an initial public offering of shares
         of common equity interests or other securities equivalent thereto of
         UDLP;

                  (c) the consummation of (i) the sale of UDLP to one or more
         parties pursuant to which such party or parties acquire greater than
         50% of the equity interests, capital stock or other securities of UDLP
         (whether by merger, consolidation, sale or transfer of equity
         interests, capital stock or other securities or otherwise) or (ii) the
         sale of all or substantially all of UDLP's assets, in either case
         whether in one transaction or a series of related transactions;

                  (d) * * *

                  (e) * * *

                  (f) * * *

                  3. Right of Set-Off. Upon the maturity of the Special Note,
whether at scheduled maturity or pursuant to the mandatory prepayment provisions
of Section 2 or pursuant to acceleration (the "Set-Off Date"), Buyer shall have
the right to assert a set-off against any and all amounts due under the Special
Note the amount of any Loss that Buyer shall have incurred as a result of a Loss
Event. If Buyer desires to assert such a Loss, Buyer shall provide to Sellers
(as soon as possible, and in any event within 30 days after the Set-Off Date in
the case of a mandatory prepayment of the Special Note or acceleration and on or
before the Set-Off Date in the case of scheduled maturity) a written statement
(a "Set-Off Statement") setting forth in reasonable detail the amount of any
asserted Loss, the basis of Buyer's asserted right to set-off of any such Loss
and a detailed statement of how any such Loss is a result of a Loss Event.
Sellers may contest the amount or validity and propriety of any item of Loss set
forth on the Set-Off Statement by giving written notice thereof to Buyer within
60 days after receipt of the Set-Off Statement. No amount of Loss specified on
any Set-Off Statement shall be valid or proper unless it is set forth in
reasonable detail on such Set-Off Statement, and the amount of any Loss on any
such Set-Off Statement not contested by Sellers in such a written notice of
Sellers shall be conclusively deemed to be valid and proper. The amount of any
Loss specified in a Set-Off Statement which is so contested shall be resolved
pursuant to the arbitration provisions set forth on Schedule 29(b) of the
Purchase Agreement. * * * Interest shall continue to accrue on the principal
amount of the Special Note which was not paid based on any Loss specified in a
Set-Off Statement which is subject to arbitration as provided above and shall be
payable to Sellers if and when such amount is determined to have not been
properly set-off but shall not be payable with respect to any such amount which
is determined to have been properly set-off.

                  4. Limitations on Right of Set-Off. Notwithstanding anything
to the contrary in Section 3 above, the right of Buyer to a set-off as specified
in Section 3 above is subject to the following limitations. If there has
occurred * * * and subsequently, in any final and non-appealable adjudication,
it is determined by a court, agency or other tribunal of competent jurisdiction
that * * * was impermissible, wrongful, unlawful or otherwise improper, then the
amount of Loss set-off in connection with the applicable Set-Off Statement shall
be redetermined by the arbitrators pursuant to the arbitration provisions set
forth on Schedule 29(b) of the Purchase Agreement and any reduction shall be
paid (with accrued interest thereon) to Sellers.


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<PAGE>   3
                  5. Covenants.

                  (a) In anticipation of or in the event of a Loss Event,
         Sellers shall have the right to participate in any and all
         negotiations, discussions, meetings and other communications relating
         to the Loss Event or potential Loss Event, as applicable, and shall
         have the right to approve of any and all settlements, agreements or
         other arrangements made in connection therewith (such approval not to
         be unreasonably withheld or delayed).

                  (b) In anticipation of or in the event of a Loss Event,
         subject to Seller's rights pursuant to clause (a) above, Buyer shall
         and shall cause its Affiliates to use all commercially reasonable
         efforts to (a) obtain * * * in the most cost-effective and expeditious
         manner practicable (provided that the costs thereof to UDLP or Buyer
         shall constitute a loss subject to rights of set-off) and (b) otherwise
         act in good faith to minimize any Loss in respect of any such Loss
         Event.

                  (c) * * *

                  (d) Buyer shall deliver to Sellers at Buyer's sole cost and
         expense (so long as Sellers hold any portion of the outstanding
         principal amount of the Special Note or so long as any arbitration
         proceeding contemplated by Section 3 above is not finally resolved,
         whichever is later, and in the form regularly prepared in the ordinary
         course):

                  * * *

                  (e) So long as Sellers hold any portion of the outstanding
         principal amount of the Special Note or so long as any arbitration
         proceeding contemplated by Section 3 above is not finally resolved,
         whichever is later, * * *.

                  6. Definitions. As used in this Agreement (including the
Exhibits hereto), the following definitions shall apply:

                  "Adverse Legal Consequences" shall mean Losses to Buyer or
         UDLP, under * * *.

                  * * *

                  "UDLP" means United Defense, L.P. and its successors.

                  7. Amendment and Waiver. No modification, amendment or waiver
of any provision of this Agreement shall be effective against any party hereto
unless such modification, amendment or waiver is approved in writing by such
party. The failure of any party hereto to enforce any of the provisions of this
Agreement shall in no way be construed as a waiver of such provisions and shall
not affect the right of such party thereafter to enforce each and every
provision of this Agreement in accordance with its terms.

                  8. Severability. Whenever possible, each provision of this
Agreement shall be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of


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<PAGE>   4
this Agreement is held to be invalid, illegal or unenforceable in any respect
under any applicable law or rule in any jurisdiction, such invalidity,
illegality or unenforceability shall not affect the validity, legality or
enforceability of any other provision of this Agreement in such jurisdiction or
affect the validity, legality or enforceability of any provision in any other
jurisdiction, but this Agreement shall be reformed, construed and enforced in
such jurisdiction as if such invalid, illegal or unenforceable provision had
never been contained herein.

                  9. Entire Agreement. Except as otherwise expressly set forth
herein, this Agreement embodies the complete agreement and understanding among
the parties hereto with respect to the subject matter hereof and supersedes and
preempts any prior understandings, agreements or representations by or among the
parties, written or oral, which may have related to the subject matter hereof in
any way.

                  10. Successors and Assigns. Except as otherwise provided
herein, this Agreement shall bind and inure to the benefit of and be enforceable
the respective successors and assigns of each of the parties hereto.

                  11. Counterparts. This Agreement may be executed in multiple
counterparts (including by means of telecopied signature pages), each of which
shall be an original and all of which taken together shall constitute one and
the same agreement.

                  12. Notices. Any notice provided for in this Agreement shall
be in writing and shall be either personally delivered, or mailed first class
mail (postage prepaid) or sent by reputable overnight courier service (charges
prepaid) to any party hereto at the address indicated in the Purchase Agreement,
or at such address or to the attention of such other person as the recipient
party has specified by prior written notice to the sending party. Notices shall
be deemed to have been given hereunder when delivered personally, three days
after deposit in the U.S. mail and one day after deposit with a reputable
overnight courier service.

                  13. Governing Law. This Agreement shall be governed by and
construed in accordance with the internal laws of the State of Illinois, without
giving effect to any choice of law or conflict of law rules or provisions
(whether of the State of Illinois or any other jurisdiction) that would cause
the application of the laws of any jurisdiction other than the State of
Illinois.

                  14. Descriptive Headings; Interpretation. The descriptive
headings and captions of this Agreement are inserted for convenience only and do
not constitute a part of this Agreement. The use of the word "including" herein
shall mean "including without limitation."

                  15. Sole Remedy. The rights of set-off as provided in this
Agreement shall be the exclusive right and remedy of Buyer for any alleged Loss
resulting from any Loss Event (it being understood, however, that Buyer shall
only be entitled to a set-off under the circumstances, in the events
contemplated by and pursuant to the provisions of Sections 3 and 4 above). Other
than as set


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<PAGE>   5
forth in this Agreement, Sellers shall have no liability whatsoever for any
amount claimed to be set-off pursuant to the terms of this Agreement or in
excess of the amount, if any, available to be set-off hereunder from time to
time.


                            *   *   *   *   *




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<PAGE>   6
                  IN WITNESS WHEREOF, the parties hereto have entered into this
Agreement as of the date first written above.

                                          FMC CORPORATION

                                          By:  /s/ J. Paul McGrath
                                               ---------------------------------
                                          Its: Senior Vice President


                                          HARSCO CORPORATION

                                          By:  /s/ Leonard A. Campanaro
                                               ---------------------------------
                                          Its: Senior Vice President and C.F.O.


                                          HARSCO UDLP CORPORATION

                                          By:  /s/ Leonard A. Campanaro
                                               ---------------------------------
                                          Its: Treasurer


                                          IRON HORSE ACQUISITION CORP.

                                          By:  /s/ Allan M. Holt
                                               ---------------------------------
                                          Its: President



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<PAGE>   7
                     EXHIBIT A -- TERMS OF THE SPECIAL NOTE

Borrower:                     The entity that issues the Senior Debt and Senior
                              Notes.

Principal Amount:             $50,000,000

Maturity:                     The final maturity of the Special Note shall be 3
                              years from the Closing Date.

Ranking:                      The payment of principal of, premium, if any, and
                              interest on the Special Note will be subordinate
                              and subject in right of payment to all existing
                              and future Senior Indebtedness (to be defined) and
                              pari passu in right of payment with all other
                              senior subordinated or subordinated indebtedness
                              of Borrower. Initially Senior Indebtedness will
                              consist principally of Borrower's bank facility
                              and subordinated indebtedness will consist
                              principally of $225 million of senior subordinated
                              notes (the "Senior Notes"), and the parties will
                              agree to appropriate protections to preserve
                              equivalent type of ranking in connection with
                              future debt incurrences.

Guaranties:                   Each person who guarantees Borrower's Senior Notes
                              (each a "Guarantor" and, collectively, the
                              "Guarantors") shall be required to provide a
                              guaranty of all amounts owing under the Special
                              Note (the "Guaranties"), equivalent in ranking and
                              terms to the Guarantees of the Sub Debt.

Interest Rates:               Outstanding principal on the Special Note shall
                              bear interest at the same rate per annum as the
                              Senior Notes, and shall be payable quarterly in
                              arrears on the last business day of each calendar
                              quarter. Interest will also be payable at the time
                              of repayment of the Special Note and at maturity.

Covenants:                    The Special Note will have substantially the same
                              covenants and default provisions as the Senior
                              Notes; provided, however, that the maturity of the
                              Special Note may be accelerated only in the event
                              of acceleration of the Senior Debt and the Senior
                              Notes.

Subordination:                As required by senior lenders (equivalent to the
                              Senior Notes).




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<PAGE>   1
                      ALLOCATION AND CONTRIBUTION AGREEMENT


                  This ALLOCATION AND CONTRIBUTION AGREEMENT (this "Agreement")
is entered into as of August 25, 1997, by and among FMC Corporation ("FMC") and
Harsco Corporation and Harsco UDLP Corporation (collectively, the "Harsco
Indemnitors"). FMC and the Harsco Indemnitors are hereafter sometimes
collectively referred to as the "Indemnitors", and each individually as an
"Indemnitor," and FMC and the Harsco Indemnitors (collectively as one party) are
each referred to herein as a "Party". Capitalized terms used herein but not
defined herein shall have the respective meanings given to such terms in the
Purchase Agreement (defined below).

                  WHEREAS, FMC is the sole owner and holder of 100% of the
outstanding general partnership interests of United Defense, L.P., a Delaware
limited partnership ("UDLP") and Harsco UDLP Corporation is the sole owner and
holder of 100% of the outstanding limited partnership interests of UDLP;

                  WHEREAS, as the general partner of UDLP, FMC has had the
principal responsibility for the management and operation of UDLP;

                  WHEREAS, the Indemnitors have determined that it is in their
respective best interests, and in the best interests of UDLP, to sell the
general partnership and limited partnership interests together and to give joint
and several representations, warranties and covenants to the buyer of such
interests in connection therewith;

                  WHEREAS, contemporaneously herewith the Indemnitors are
entering into a Purchase Agreement (the "Purchase Agreement") dated as of August
25, 1997 with Iron Horse Acquisition Corp. (the "Buyer") pursuant to which the
Buyer is agreeing to acquire all of the partnership interests in UDLP;

                  WHEREAS, pursuant to certain provisions of the Purchase
Agreement, the Indemnitors are required to make certain payments to the Buyer
and/or UDLP and the Indemnitors have agreed, subject to the terms and conditions
set forth therein, to jointly and severally indemnify, defend and hold the Buyer
Indemnitees harmless from and in respect of certain Losses;

                  WHEREAS, to induce each Party to enter into the Purchase
Agreement and to consummate the transactions contemplated thereby, the other
Party is making herein certain representations, warranties and covenants, on
which the Party benefitting from such representations, warranties and covenants
is and will be relying in entering into the Purchase Agreement and consummating
the transactions contemplated thereby;

                  WHEREAS, without limiting the generality of the foregoing
recital, the Harsco Indemnitors are joining with FMC in certain joint and
several representations, warranties and
<PAGE>   2
covenants in the Purchase Agreement and the other Ancillary Agreements in
reliance on the representations, warranties and covenants of FMC contained in
this Agreement;

                  WHEREAS, pursuant to certain provisions of the Purchase
Agreement, the Indemnitors make certain representations, warranties and
covenants to the Buyer, and the Indemnitors have agreed, subject to the terms
and conditions set forth therein, to indemnify, defend and hold the Buyer
Indemnitees (as defined below) harmless from and in respect of certain Losses;

                  WHEREAS, pursuant to certain provisions of the Purchase
Agreement, Buyer and/or UDLP is required to make certain payments to Sellers,
and Buyer has agreed, subject to the terms and conditions set forth therein, to
indemnify, defend and hold the Seller Indemnitees (as defined below) harmless
from and in respect of certain Losses; and

                  WHEREAS, in connection with the sale of UDLP pursuant to the
Purchase Agreement and the consequent termination of their relationship as
partners of UDLP, the Indemnitors wish to make certain agreements among
themselves relating to the past conduct of UDLP's business.

                  NOW, THEREFORE, in consideration of the foregoing premises and
the mutual promises made herein and for other good and valuable consideration
the receipt and sufficiency of which is hereby acknowledged, and intending to be
legally bound hereby, the Indemnitors agree as follows:

1. Certain Definitions.

                  "Buyer Indemnitees" shall mean the Buyer Indemnified Parties.

                  "FMC Covenants" means the covenants contained in the following
Sections of the Purchase Agreement: Section 2(b)(iv), Section 5 (but excluding
Sections 5(c), 5(e), 5(f) and 5(j)), Sections 8(a), 8(d), 8(e), 8(h), 10(d),
10(i)(i), 10(j) and, except to the extent that the context otherwise clearly
requires and except to the extent that the performance of such covenant is
peculiarly within the control of Harsco (as opposed to FMC), all other covenants
in the Purchase Agreement (other than the Several Covenants) that make reference
to Sellers or a Seller but which do not identify either FMC or Harsco by name.

                  "FMC Representations" means (i) all representations and
warranties relating to FMC's Corporate Technology Center ("CTC") and (ii) the
representations and warranties contained in Sections 4A and 23 (as it relates to
FMC and its affiliates) and all other representations of a Seller in the
Purchase Agreement (other than the Shared Representations) that make reference
to Sellers or a Seller but which do not identify either FMC or Harsco by name.

                  "Harsco Representations" means the representations and
warranties contained in Sections 4B and 23 (as it relates to Harsco and its
affiliates).



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<PAGE>   3
                  "Pro Rata Portion" means 60% in the case of FMC and 40% in the
case of the Harsco Indemnitors.

                  "Seller Indemnitees" shall mean each Indemnitor, each of its
Affiliates and each of their respective officers, directors and employees.

                  "Several Covenants" means the covenants contained in the
following Sections of the Purchase Agreement: Sections 1(b), 1(c), 2(a),
2(b)(ii), 5(c), 5(e), 5(f), 5(j), 7(f), 8(b), 8(c), 8(f)(iii), 8(g)(ii), 8(i),
8(n), 8(p), 9, 10(a), 10(b), 10(e), 10(f), 10(h), 10(j)(ii), 10(k) (to the
extent required in the case of Harsco), 12, 16 and 29.

                  "Shared Representations" means the representations and
warranties contained in Section 4C(a)(i), 4C(b), 4C(d) (excluding those relating
to the Latest Financials), 4C(e), 4C(f), 4C(g), 4C(l) and 4C(n) (excluding those
matters subject to Section 8(f) of the Purchase Agreement) of the Purchase
Agreement.

         2. Representations and Warranties of the Harsco Indemnitors. Each of
the Harsco Indemnitors jointly and severally represents and warrants to FMC as
of the date of this Agreement as follows:

                  2.1 Authorization. This Agreement constitutes the valid and
legally binding obligation of such Harsco Indemnitor, enforceable against such
Harsco Indemnitor in accordance with its terms and conditions, except as may be
limited by (a) applicable bankruptcy, reorganization, insolvency, moratorium or
other similar laws affecting the enforcement of creditors' rights generally from
time to time in effect and (b) the effect of general principles of equity
(regardless of whether such enforceability is considered in a proceeding in
equity or at law).

                  2.2 Non-contravention. Neither the execution and the delivery
of this Agreement by such Harsco Indemnitor, nor the performance by such Harsco
Indemnitor of its obligations hereunder, will (i) violate any constitution,
statute, regulation, rule, injunction, judgment, order, decree, ruling, charge
or other restriction of any government, governmental agency or court to which
the Harsco Indemnitor is subject or any provision of its organizational
documents or (ii) conflict with, result in a breach of, constitute a default
under, result in the acceleration of, or create in any party the right to
accelerate, terminate, modify, cancel or require any notice under any agreement,
contract, lease, license, instrument or other arrangement to which the Harsco
Indemnitor is a party or by which such Harsco Indemnitor is bound or to which
any of such Harsco Indemnitor's assets are subject except for such conflicts,
breaches, defaults, or rights that would not, individually or in the aggregate,
be reasonably likely to have a material adverse effect upon the financial
condition of such Harsco Indemnitor.

                  2.3 Consents. No consent, authorization, approval, permit or
license of, or filing with, any governmental or public body or authority, any
lender or lessor or any other person or entity is required to be obtained or
made by any Harsco Indemnitor to authorize, or is required to be obtained or
made by any Harsco Indemnitor in connection with, the execution, delivery and


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<PAGE>   4
performance of this Agreement or the agreements contemplated hereby on the part
of such Harsco Indemnitor (other than those that have been obtained or made).

         3. Representations and Warranties of FMC. FMC represents and warrants
to the Harsco Indemnitors as of the date of this Agreement as follows:

                  3.1 Authorization. This Agreement constitutes the valid and
legally binding obligation of FMC, enforceable against FMC in accordance with
its terms and conditions, except as may be limited by (a) applicable bankruptcy,
reorganization, insolvency, moratorium or other similar laws affecting the
enforcement of creditors' rights generally from time to time in effect and (b)
the effect of general principles of equity (regardless of whether such
enforceability is considered in a proceeding in equity or at law).

                  3.2 Non-contravention. Neither the execution and the delivery
of this Agreement by FMC, nor the performance by FMC of its obligations
hereunder, will (i) violate any constitution, statute, regulation, rule,
injunction, judgment, order, decree, ruling, charge or other restriction of any
government, governmental agency or court to which FMC is subject or any
provision of its organizational documents or (ii) conflict with, result in a
breach of, constitute a default under, result in the acceleration of, or create
in any party the right to accelerate, terminate, modify, cancel or require any
notice under any agreement, contract, lease, license, instrument or other
arrangement to which FMC is a party or by which FMC is bound or to which any of
FMC's assets are subject except for such conflicts, breaches, defaults, or
rights that would not, individually or in the aggregate, be reasonably likely to
have a material adverse effect upon the financial condition of FMC.

                  3.3 Consents. No consent, authorization, approval, permit or
license of, or filing with, any governmental or public body or authority, any
lender or lessor or any other person or entity is required to be obtained or
made by FMC to authorize, or is required to be obtained or made by FMC in
connection with, the execution, delivery and performance of this Agreement or
the agreements contemplated hereby on the part of FMC (other than those that
have been obtained or made).

                  3.4 Purchase Agreement. FMC has provided to the Harsco
Indemnitors all agreements and understandings between or among the Buyer and FMC
and UDLP relating to the sale of UDLP.

                  3.5 Representations and Warranties Relating to the Purchase
Agreement. Certain of the representations and warranties contained in the
Purchase Agreement and other Ancillary Agreements are given jointly and
severally by the Sellers, including without limitation certain representations
and warranties relating to FMC's Corporate Technology Center. Notwithstanding
anything in the Purchase Agreement or in any Ancillary Agreement to the
contrary, the Parties agree that as an inducement to the Harsco Indemnitors to
enter into the Purchase Agreement and the Ancillary Agreements, FMC will be
solely responsible for the truth, correctness and completeness of the FMC
Representations and the Shared Representations except to the extent any Harsco
Indemnitor is responsible pursuant to Section 6.2(a) hereof and except to the
extent any Harsco


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<PAGE>   5
Indemnitor had actual knowledge of the breach of such representation or warranty
prior to the date hereof.

         4. Additional Covenants of FMC.

                  4.1 Covenants in the Purchase Agreement and Ancillary
Agreements. Certain of the covenants contained in the Purchase Agreement and
other Ancillary Agreements are given jointly and severally by the Sellers on
behalf of UDLP. Notwithstanding anything in the Purchase Agreement or in any
Ancillary Agreement to the contrary, it is the intention of the Parties, and is
an inducement to the Harsco Indemnitors to enter into the Purchase Agreement and
the Ancillary Agreements, that FMC be solely responsible for performing,
satisfying, discharging and complying with, or for causing UDLP to perform,
satisfy, discharge and comply with all of the FMC Covenants. FMC hereby agrees
that it will be solely responsible for performing, satisfying, discharging and
complying with, or for causing UDLP to perform, satisfy, discharge and comply
with all of the FMC Covenants.

                  4.2 Intercompany Loans. FMC shall repay in full all
outstanding intercompany obligations between it and UDLP or any of the
Subsidiaries at or prior to the Closing, except as otherwise provided in Section
5(h) of the Purchase Agreement.

                  4.3 Representations and Warranties; Performance of
Obligations. On the Closing Date, FMC shall deliver a certificate to the Harsco
Indemnitors to the same effect as the certificate required to be delivered by
FMC to the Buyer pursuant to Section 3(a) of the Purchase Agreement (if such
certificate is delivered).

                  4.4 File Plan. FMC will include in any File Plan delivered
pursuant to Section 8(g)(ii) of the Purchase Agreement any items requested by
Harsco.

         5. Additional Covenants of the Harsco Indemnitors.

                  5.1 Representations and Warranties; Performance of
Obligations. On the Closing Date, the Harsco Indemnitors shall deliver a
certificate to FMC to the effect that all of the representations and warranties
of the Harsco Indemnitors contained in this Agreement are true, correct and
complete on and as of the Closing Date with the same effect as though such
representations and warranties had been made on and as of such date and that all
of the terms, covenants, agreements and conditions of this Agreement to be
complied with, performed or satisfied by the Harsco Indemnitors on or before the
Closing Date have been duly complied with performed or satisfied in all material
respects.


                                       -5-
<PAGE>   6
         6. Contribution.

                  6.1 Payments in Respect of San Jose/Santa Clara Remediation
Costs, Stock Options and Restricted Stock and CTC and Transferred Employees;
Buyer Note.

                  (a) At or before the Closing, FMC shall pay to the Harsco
         Indemnitors $2,492,160 to pay certain Remediation Costs relating to the
         Sites covered by the Settlement and Advance Agreement, which costs are
         likely to be incurred and payable by FMC and reimbursable by the Buyer
         pursuant to the terms of the Purchase Agreement.

                  (b) Within two business days after the Closing, the Harsco
         Indemnitors shall pay FMC 40% of the Agreed Value of (i) the
         unexercised FMC stock options issued to UDLP executives and employees
         in 1994 and 1995 which are either currently vested or scheduled to vest
         on or prior to January 31, 1998 (all of which options are listed on
         Exhibit A hereto, which listing includes as to each such option, the
         name of the optionee, the year of grant, the exercise price and the
         number of Shares subject thereto) and (ii) certain shares of the FMC
         restricted stock issued to UDLP executives and employees subsequent to
         January 1, 1994 (which will become unrestricted upon the Closing) (all
         of which shares are listed on Exhibit A hereto, which listing includes
         as to each recipient, the name of the recipient, the date of grant, the
         closing trading price of FMC common stock on the date of grant, and the
         number of shares granted, and provided that FMC represents that such
         listing does not include, as to Mr. Rabaut, any shares granted on
         account of his position at FMC). For purposes of the foregoing, "Agreed
         Value" means the market value of the shares of FMC common stock
         issuable under such options less the aggregate exercise price and the
         market value of the shares of restricted stock (without restriction),
         in each case as calculated based on the closing trading price of the
         FMC common stock on the Closing Date or, in the case of restricted
         stock, on the date of grant as reported in the Wall Street Journal.

                  (c) The net effect upon the net worth adjustment contained in
         Section 2(b) of the Purchase Agreement of the impact of including CTC
         and the Transferred Employees as part of the accounts reflected in the
         Adjusted Net Worth Amount as of both June 30, 1997 and the Closing Date
         (the "CTC Adjustment Amount") shall be separately calculated by FMC in
         connection with the preparation of the Closing Statement and provided
         to Harsco with the Closing Statement. Harsco shall have the right, with
         FMC's full cooperation, to review and audit FMC's calculation of the
         CTC Adjustment Amount. If the CTC Adjustment Amount is negative, FMC
         shall pay 40% of such amount to Harsco. If the CTC Adjustment is
         positive, Harsco shall pay 40% of such amount to FMC. Any such payments
         shall be made as soon as possible after they are determined and shall
         be appropriately adjusted if the relevant accounts are adjusted in
         connection with the finalization of the Closing Statement. Amounts
         payable hereunder shall bear interest from the Closing Date at the rate
         provided in Section 2(b)(ii) of the Purchase Agreement.



                                       -6-
<PAGE>   7
                  (d) FMC shall pay to the Harsco Indemnitors 40% of any amounts
         collected in respect of the FNSS royalty dispute (as more specifically
         described in Schedule 7(f) to the Purchase Agreement the "FNSS Royalty
         Dispute"), to the extent such amounts are attributable to periods
         following the formation of UDLP.

                  (e) Notwithstanding anything to the contrary in the
         Supplemental Agreement No. 1 to Purchase Agreement, dated as of August
         25, 1997, by and among FMC Corporation, Harsco Corporation, Harsco UDLP
         Corporation and Iron Horse Acquisition Corp. (the "Supplemental
         Agreement") or in the provisions of the Special Note (as defined
         therein), as between the Harsco Indemnitors and FMC, (i) the Harsco
         Indemnitors shall receive from the Buyer $340,000,000 plus 40% of the
         Adjustment Amount (whether positive or negative), in immediately
         available funds, at and upon the Closing and FMC shall receive from the
         Buyer a total of $510,000,000 plus 60% of the Adjustment Amount
         (whether positive or negative), in immediately available funds, and, if
         issued, the Special Note and (ii) for all purposes of the Supplemental
         Agreement, the term "Sellers" shall mean FMC, except in the case of
         Section 5(a) thereof, in which "Sellers" shall mean FMC and the Harsco
         Indemnitors. The Harsco Indemnitors shall pay to FMC in immediately
         available funds, within three business days following the later of (A)
         the maturity of the Special Note (whether at scheduled maturity or
         pursuant to the mandatory prepayment provisions of Section 2 of the
         Supplemental Agreement or pursuant to acceleration) or (B) the final
         determination of any dispute regarding the amount to be finally paid to
         FMC under the Special Note, 40% of the first $25,000,000 of any Payment
         Deficiency. For purposes of this Section 6.1(e), "Payment Deficiency"
         means the difference between (A) $50,000,000 and (B) the principal
         amount of the Special Note actually paid to FMC after set-off, if any,
         by Buyer. For example, if the amount collected by FMC on the Special
         Note is $40,000,000, then the amount that the Harsco Indemnitors shall
         pay to FMC pursuant to this Section 6.1(e) shall be $4,000,000, and if
         the amount collected by FMC on the Special Note is $20,000,000, then
         the amount that the Harsco Indemnitors shall pay to FMC pursuant to
         this Section 6.1(e) shall be $10,000,000. * * *(1), and the Harsco
         Indemnitors will have the right to participate in such efforts led by
         FMC. In the event of any dispute between FMC and the Buyer with respect
         to payment on the Special Note, FMC shall not agree to any settlement
         of any such dispute that would have an adverse effect on the Harsco
         Indemnitors without first consulting with the Harsco Indemnitors and
         obtaining the written consent of the Harsco Indemnitors (which consent
         shall not be unreasonably withheld or delayed). In addition, in the
         event of any litigation concerning any such dispute, FMC will keep the
         Harsco Indemnitors advised of all material developments in such
         litigation, and the Harsco Indemnitors shall have the right to join
         with FMC in such litigation at the sole expense of the Harsco
         Indemnitors.

- --------

    (1) The omitted text is the subject of a Confidential Treatment Request
filed with the Securities and Exchange Commission (the "Commission"). The text
for which confidential treatment has been requested has been filed separately
with the Commission.



                                       -7-
<PAGE>   8
                  6.2 Payments in Respect of Indemnification.

                  (a) Each Party will contribute its Pro Rata Portion of all
         joint obligations under the Purchase Agreement, as defined in clauses
         (i) through (ix) below, in accordance with the following sentence (the
         "Joint Obligations"). Each Party's contribution obligations under this
         paragraph 6.2(a) shall be limited to such Party's Pro Rata Portion of
         the aggregate Loss suffered or sustained by both Parties, after taking
         into account any indemnifiable Loss suffered by such Party, in order
         that both Parties ultimately bear their Pro Rata Portion of such
         aggregate Loss. Each Party agrees to indemnify and hold harmless the
         other Party against the amount of any Loss which the other Party may
         suffer, sustain or become subject to in excess of such Party's Pro Rata
         Portion of such Loss, in the event that the other Party becomes (or any
         third party asserts that such other Party is) liable or otherwise
         responsible. For the purposes of this Agreement, Joint Obligations
         means:

                         (i) any obligation of the Sellers under Section
                  8(f)(iii) of the Purchase Agreement, to the extent that it
                  relates to:

                                (A) post-1993 operation of UDLP,

                                (B) subject to clause (iii)(A) of Section 6.2(b)
                         below, environmental conditions which are discovered at
                         York subsequent to December 31, 1998 and not proven by
                         FMC to have been a Harsco Environmental Liability Event
                         (as defined in the Participation Agreement) or

                                (C) properties acquired or first used by UDLP
                         subsequent to its formation,

                         (ii) any indemnification obligation of Sellers:

                                (A) under Section 10(b) (tax indemnification) of
                         the Purchase Agreement or

                                (B) under Section 11(a)(i) of the Purchase
                         Agreement which is based on breach of a Shared
                         Representation; provided that, any indemnification
                         obligation under Section 11(a)(i) of the Purchase
                         Agreement which is based on a Shared Representation
                         shall be a Joint Obligation only to the extent that the
                         aggregate of all Losses suffered and paid by FMC as a
                         result of breaches of Shared Representations on a
                         cumulative basis as a result of the indemnification
                         obligations under Section 11(a)(i) of the Purchase
                         Agreement exceed $10,000,000.

                         (iii) any obligation of Sellers to pay their portion of
                  the fees and expenses of Ernst & Young L.L.P. and the
                  Accounting Firm pursuant to Section 2(b) of the Purchase
                  Agreement or the escrow agent pursuant to the Escrow
                  Agreement,


                                       -8-
<PAGE>   9
                         (iv) any obligation of Sellers under Section 2(b) of
                  the Purchase Agreement to pay any amount by which the
                  Estimated Final Purchase Price exceeds the Final Purchase
                  Price,

                         (v) any obligation of Sellers to pay their portion of
                  intellectual property recordation costs pursuant to Section
                  8(o) of the Purchase Agreement,

                         (vi) any obligation of Sellers to pay their portion of
                  certain taxes pursuant to Section 10(h) of the Purchase
                  Agreement,

                         (vii) any obligation of Sellers to pay a portion of any
                  insurance recovery pursuant to Section 8(f)(v) of the Purchase
                  Agreement;

                         (viii)any obligation of Sellers to pay the amount of
                  any negative Cash Balance to the Buyer pursuant to Section
                  8(p) of the Purchase Agreement, or

                         (ix) any obligation or liability relating to UDLP
                  listed on Schedule 7(f) to the Purchase Agreement which is
                  retained or assumed on a joint basis, except for amounts
                  payable in connection with the FNSS Royalty Dispute which are
                  attributable to the period prior to formation of UDLP.

                  (b) FMC agrees to indemnify and hold harmless the Harsco
         Indemnitors against the amount of any Loss which Harsco may suffer,
         sustain or become subject to in the event that Harsco becomes (or the
         Buyer or any third party asserts that any Harsco Indemnitor is) liable
         or otherwise responsible for:

                         (i) any Losses suffered or incurred by any Harsco
                  Indemnitor to the extent arising from:

                                (A) any breach of any representation or warranty
                         of FMC contained herein or of any FMC Representation,
                         except to the extent any Harsco Indemnitor is
                         responsible pursuant to Section 6.2(a) hereof and
                         except to the extent any Harsco Indemnitor had actual
                         knowledge of the breach of such representation or
                         warranty prior to the date hereof,

                                (B) any breach of any Shared Representation, but
                         only to the extent that the aggregate of all Losses
                         suffered and paid by FMC as a result of a breach of a
                         Shared Representation on a cumulative basis as a result
                         of the indemnification obligation under Section
                         11(a)(i) of the Purchase Agreement does not exceed
                         $10,000,000 or

                                (C) any breach of any covenant of FMC contained
                         herein, any breach of any FMC Covenant or any breach by
                         FMC of any Several Covenant,



                                       -9-
<PAGE>   10
                         (ii) any Losses suffered or incurred by any Harsco
                  Indemnitor arising from:

                                (A) any wrongful, self-dealing, grossly
                         negligent, reckless or bad faith conduct by FMC in
                         connection with its conduct on behalf of UDLP or any
                         Harsco Indemnitor, including in connection with the
                         sale of FMC's Partnership Interest in UDLP or Harsco's
                         Partnership Interest in UDLP pursuant to the Purchase
                         Agreement or

                                (B) any failure by FMC to observe any applicable
                         duty or obligation to UDLP or any Harsco Indemnitor
                         arising out of any wrongful, self-dealing, grossly
                         negligent, reckless or bad faith conduct by FMC;

                  provided that, in the event of any claim under this clause
                  (ii) relating to the consideration payable or the terms and
                  conditions of the sale of UDLP, FMC's conduct shall be
                  reviewed on a comparable basis to that provided to a Delaware
                  corporation and its directors under the business judgment
                  rule,

                         (iii) subject to clause (i)(A) of Section 6.2(a) above,
                  any obligation of Sellers under Section 8(f)(iii) of the
                  Purchase Agreement to the extent that it relates to:

                                (A) the first $1,000,000 that relates to
                         environmental conditions at UDLP's York property that
                         Harsco would otherwise be responsible for under clause
                         (i) of Section 6.2(c) below,

                                (B) the pre-1994 operation of FMC's defense
                         business, or

                                (C) properties contributed by FMC to UDLP upon
                         its formation and

                         (iv) any obligation or liability relating to UDLP which
                  is retained or assumed by FMC as specifically set forth in the
                  Purchase Agreement, including those items listed on Schedule
                  7(f) thereto and all amounts payable in connection with the
                  FNSS Royalty Dispute which are attributable to periods prior
                  to formation of UDLP.

For purposes of this Agreement, the actual knowledge of the Harsco Indemnitors
shall be deemed to refer only to the actual present knowledge of Derek Hathaway
and Leonard Campanaro, without such individual having conducted any inquiry or
review.

                  (c) The Harsco Indemnitors agree to indemnify and hold
         harmless FMC against the amount of any Loss which FMC may suffer,
         sustain or become subject to in the event that FMC becomes (or Buyer or
         any third party asserts that FMC is) liable or otherwise responsible
         for:


                                      -10-
<PAGE>   11
                         (i) subject to clauses (i)(A) and (i)(B) of Section
                  6.2(a) above and subject to clause (iii)(A) of Section 6.2(b)
                  above, any obligation of Sellers under Section 8(f)(iii) to
                  the extent that it relates to:

                                (A) the pre-1994 operation of Harsco's defense
                         business or

                                (B) properties contributed by Harsco to UDLP
                         upon its formation,

                         (ii) any Losses suffered or incurred by FMC to the
                  extent arising from:

                                (A) any breach of any Harsco Representation or
                         any representation or warranty of any Harsco entity
                         contained herein or

                                (B) any breach by Harsco of any Several Covenant
                         or any covenant of any Harsco entity contained herein
                         and

                         (iii) any obligation or liability relating to UDLP
                  which is retained or assumed by Harsco as specifically set
                  forth in the Purchase Agreement, including those items listed
                  on Schedule 7(f) thereto.

                  (d) Each Party further agrees to indemnify and hold harmless
         the other Party against the amount of any Loss which the other Party
         may suffer, sustain or become subject to in respect of any obligation
         of such Party which is, pursuant to the terms of the Purchase
         Agreement, a several obligation of such Party alone and not a joint and
         several obligation of the Parties.

                  6.3 Indemnity Procedures.

                  (a) Indemnity Dispute Costs. Following the Closing, the
         Parties will cooperate in a commercially reasonable manner in
         connection with any indemnification or other claim made by the Buyer or
         any third party under the Purchase Agreement or otherwise relating to
         UDLP, but subject to the provisions of the Purchase Agreement,
         including the provisions contained in Section 2(b), Section 10 and
         Section 11(f) of the Purchase Agreement relating to the control of the
         defense and management of certain indemnification and other claims and
         matters by FMC. In the event that FMC determines to dispute, defend or
         otherwise manage any such claim or any other claim made by the Buyer or
         any third party, then FMC shall be responsible for all of the costs,
         fees and expenses incurred on behalf of FMC in connection with such
         dispute, defense or management (the "Indemnity Dispute Costs"). The
         Harsco Indemnitors shall be responsible for all of the costs, fees and
         expenses of their participation in such dispute, defense or management.

                  (b) Third Party Claims. With respect to any indemnification
         under this Section 7 in respect of, arising out of or involving a claim
         by any Person, including the Buyer (a "Third Party Claim"), against a
         Party hereto (the "Indemnified Party"), FMC must notify the


                                      -11-
<PAGE>   12
         Harsco Indemnitors of the Third Party Claim within a reasonable time
         after receipt by FMC of written notice of the Third Party Claim.
         Thereafter, FMC shall, within ten days of receipt thereof, deliver
         copies of all notices and documents (including court papers) received
         by them relating to the Third Party Claim to the Harsco Indemnitors.

                  (c) Defense of Third Party Claims. If a Third Party Claim is
         made against an FMC Indemnified Party for a claim relating to the
         breach of a representation, warranty or covenant made jointly by the
         Parties in the Purchase Agreement, the Harsco Indemnitors shall be
         entitled to participate in the defense thereof (a "Joint Third Party
         Claim"). FMC shall cooperate in all reasonable respects with the Harsco
         Indemnitors in connection with such defense, including by permitting
         the Harsco Indemnitors to appoint counsel and to have such counsel
         observe and participate in the defense of the Joint Third Party Claim
         if the Harsco Indemnitors choose at the sole expense of the Harsco
         Indemnitors. In connection with all such matters, FMC shall be
         available to consult with the Harsco Indemnitors as reasonably
         requested concerning the management of such matters and shall consider
         in good faith any comments, suggestions or proposals made by the Harsco
         Indemnitors in connection therewith. FMC shall not admit any liability
         with respect to, or settle, compromise or discharge, any Joint Third
         Party Claim without the prior written consent of the Harsco Indemnitors
         (which will not be unreasonably withheld or delayed). The management
         of, and all decisions regarding (including decisions regarding
         settlement of) any dispute or defense of a claim for which either FMC
         or the Harsco Indemnitors are solely responsible pursuant to the terms
         of the Purchase Agreement shall at all times be at the direction of and
         otherwise made by the Party who bears responsibility for the claim.

                  6.4 Survival of Representations. The representations and
warranties in this Agreement shall survive the Closing to the same extent set
forth in the Purchase Agreement.

                  7. Escrow Deposit. If and when the Escrow Deposit, referred to
in the Escrow Agreement attached as Exhibit 6(c) to the Purchase Agreement is to
be paid to FMC and Harsco, it shall be allocated on a Pro Rata Basis to the
Parties.

                  8. Prepayment of Intercompany Debt; Allocation of Cash
Distributions and Payments. Immediately prior to the Closing, FMC shall repay
all intercompany debt owed to UDLP, together with interest accrued through the
date of repayment. Promptly following the Closing Date, FMC shall pay to the
Harsco Indemnitors (i) 100% of any amounts attributable to limited partner
allocations that accrue through the Closing (to the extent not directly
distributed to Harsco) and (ii) 40% of any other distribution or payment made by
UDLP to FMC at Closing for the ratable benefit of both partners (to the extent
not directly distributed to Harsco). The Harsco Indemnitors hereby acknowledge
and agree that any distribution or payment made by UDLP to FMC at Closing in
respect of "B" service fees that accrue through the Closing shall be retained
solely by FMC.

         9. Limited Partner Consent. The Harsco Indemnitors hereby consent and
agree to the terms and provisions of the Transition Services Agreement, the
Technology and Environmental


                                      -12-
<PAGE>   13
Services Agreement, the Amended and Restated FMC Intellectual Property
Agreement, the Amended and Restated Lease Agreement and the FMC Resource
Transfer.

         10. Allocation of Expenses. Each Party hereby agrees to pay its Pro
Rata Portion of the following out-of-pocket expenses incurred by the Indemnitors
in connection with the transactions contemplated by the Purchase Agreement: (i)
costs of the preparation and filing of all UDLP Tax Returns relating to Taxes
incurred in connection with the pre-closing business and operations of UDLP or
the transactions contemplated by the Purchase Agreement and (ii) costs of the
preparation of financial statements of UDLP incurred in connection with the
transactions contemplated by the Purchase Agreement. Each Party hereby agrees to
pay its own respective costs for legal services, filing fees and regulatory
expenses incurred in order to comply with United States and foreign antitrust
and competition laws.

         11. Miscellaneous.

                  11.1 No Third-Party Beneficiaries. This Agreement shall not
confer any rights or remedies upon any Person other than the Indemnitors and
their respective successors and permitted assigns.

                  11.2 Entire Agreement. This Agreement, together with the
Purchase Agreement (and the exhibits and schedules thereto) constitute the
entire agreement among the Indemnitors with respect to the subject matter hereof
and supersedes any prior understandings, agreements, or representations by or
among the Indemnitors, written or oral, to the extent they related in any way to
the subject matter hereof.

                  11.3 Succession and Assignment. This Agreement shall be
binding upon and inure to the benefit of the Indemnitors and their respective
successors and permitted assigns. No Indemnitor may assign either this Agreement
or any of such Indemnitor's rights, interest or obligations hereunder without
the prior written approval of the other Indemnitors.

                  11.4 Counterparts. This Agreement may be executed in one or
more counterparts (including by means of telecopied signature pages), each of
which shall be deemed an original but all of which together will constitute one
and the same instrument.

                  11.5 Headings. The section headings and captions contained in
this Agreement are inserted for convenience only and shall not affect in any way
the meaning or interpretation of this Agreement.

                  11.6 Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given by a reputable
and recognized overnight delivery service (e.g. Federal Express, etc.), against
receipt thereof, by telex, by telecopier against a confirmed receipt therefor or
by mail (registered or certified mail, postage prepaid, return receipt
requested) to the respective parties as follows:


                                      -13-
<PAGE>   14
                        if to FMC:

                        FMC Corporation
                        200 East Randolph Drive
                        Chicago, Illinois 60601
                        Telecopy No.:  (312) 861-6012
                        Attention:  J. Paul McGrath

                        with a copy to:

                        Kirkland & Ellis
                        200 East Randolph Drive
                        Chicago, Illinois 60601
                        Telecopy No.:  (312) 861-2200
                        Attention:  Glen E. Hess, P.C.

                        if to the Harsco Indemnitors:

                        Harsco Corporation
                        350 Poplar Church Road
                        Camp Hill, PA  17011
                        Telecopy No.:  (717) 763-6402
                        Attention:  Paul C. Coppock

                        with a copy to:

                        Morgan, Lewis & Bockius LLP
                        1800 M Street, N.W.
                        Washington, D.C.  20036
                        Telecopy No.:  (202) 467-7176
                        Attention:  Lloyd H. Feller

or to such other address as any Indemnitor hereto may, from time to time,
designate in a written notice given in like manner. Any notice given in
accordance with the requirements of this Section 11.6 shall be deemed to have
been received when delivered in person or via telecopier against receipt
thereof, five business days after deposit in the U.S. mail against receipt
thereof, and one business day after deposit with a reputable express overnight
courier service against receipt therefor.

                  11.7 Governing Law. This Agreement shall be governed by and
construed in accordance with the internal laws of the State of Delaware without
giving effect to any choice or conflict of law provision or rule (whether of the
State of Delaware or any other jurisdiction) that would cause the application of
the laws of any jurisdiction other than the State of Delaware.



                                      -14-
<PAGE>   15
                  11.8 Amendments and Waivers. No amendment or waiver of any
provision of this Agreement shall be valid unless the same shall be in writing
and signed by all of the Indemnitors.

                  11.9 Severability. Any provision of this Agreement which is
invalid, illegal or unenforceable in any jurisdiction shall, as to that
jurisdiction, be ineffective to the extent of such invalidity, illegality or
unenforceability, without affecting in any way the remaining provisions hereof
in such jurisdiction or rendering that or any other provision of this Agreement
invalid, illegal or unenforceable in any other jurisdiction. Furthermore, in
lieu of such illegal, invalid or unenforceable provision, there shall be added
automatically as part of this Agreement a provision as similar in its terms to
such illegal, invalid or unenforceable provision as may be possible and be
legal, valid and enforceable.

                  11.10 Construction. The Indemnitors have participated jointly
in the negotiation and drafting of this Agreement. In the event an ambiguity or
question of intent or interpretation arises, this Agreement shall be construed
as if drafted jointly by the Indemnitors and no presumption or burden of proof
shall arise favoring or disfavoring any Indemnitor by virtue of the authorship
of any of the provisions of this Agreement. The word "including" shall mean
including without limitation. Section references used herein, unless otherwise
specified, refer to Sections of this Agreement.

                  11.11 Exclusive Remedy; Waiver. Subject to Section 11.2 above,
the indemnification and contribution arrangements set forth in this Agreeement
constitute the exclusive arrangement among the parties with respect to the
matters set forth herein and are in lieu of any common law rights or remedies
any party may have as a joint and several indemnitor or otherwise (except with
respect to claims for fraud). Accordingly, each party expressly waives any right
it may have, and agrees not to assert any claim for, contribution or indemnity
with respect to the matters set forth herein except as set forth herein.



                       *      *      *      *      *



                                      -15-
<PAGE>   16
                  IN WITNESS WHEREOF, the undersigned have executed this
Allocation and Contribution Agreement as of the date first above written.

                                          FMC CORPORATION


                                          By:    /s/ J. Paul McGrath
                                                 -------------------------------
                                          Name:  J. Paul McGrath
                                          Title: Senior Vice President


                                          HARSCO CORPORATION


                                          By:    /s/ Leonard A. Campanaro
                                                 -------------------------------
                                          Name:  L.A. Campanaro
                                          Title: Senior Vice President and CFO


                                          HARSCO UDLP CORPORATION


                                          By:    /s/ Leonard A. Campanaro
                                                 -------------------------------
                                          Name:  L.A. Campanaro
                                          Title: Treasurer




                                      -16-


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