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EXHIBIT4.3

AMENDMENT NO. 4 AND LIMITEDWAIVERTOPOST-PETITION LOAN AND SECURITYAGREEMENT

This AMENDMENT NO. 4 AND LIMITED WAIVER TOPOST-PETITION LOAN AND SECURITY AGREEMENT (this‘‘Amendment’’) is dated as ofMarch  30,  2006, among the Lenders, BANK OF AMERICA, N.A.,as agent for the Lenders (the‘‘Agent’’), W. R. GRACE & CO.(the ‘‘Company’’) and theSubsidiaries of W. R. Grace & Co. parties hereto (collectively, the‘‘Borrowers’’).

WHEREAS, theparties hereto are parties to a Post-Petition Loan and SecurityAgreement dated as of April  1,  2001 (as previouslyamended, the ‘‘Loan Agreement’’);and

WHEREAS, the parties hereto desire to amend the LoanAgreement as herein set forth:

NOW, THEREFORE, for and inconsideration of the mutual covenants set forth herein and in the LoanAgreement, and for other valuable consideration, the receipt andsufficiency of which is hereby acknowledged, the parties hereto agreeasfollows:

|  |          |             |
|--|----------|-------------|
|  | 1.  | Amendments. |

(a)    Section1.7(c) of the Loan Agreement is hereby amended and restated in itsentirety to read asfollows:

(c)    Location of Collateral    EachBorrower represents and warrants to the Agent and the Lenders that: (1)Schedule 1.7 sets forth a correct and complete list of eachBorrower’s state of organization, organizational identificationnumber (if one is issued by such Borrower’s state oforganization), chief executive office, the location of its books andrecords, the locations of its Collateral, and the locations of all ofits other places of business (other than in each case (i) locations ofreal property where no Borrower has any operations and where noCollateral (other than such real property) is located, (ii) locationsof Inventory which have been described to the Agent in writing(including, without limitation, in connection with the delivery of aBorrowing Base Certificate), (iii) locations of Collateral (other thanInventory or Eligible Fixed Assets) which have been disclosed to theAgent pursuant to the then most recent Semi-Annual Location Scheduledelivered to the Agent pursuant hereto, and (iv) locations ofCollateral described in the last proviso of this Section1.7(c)); and (2) Schedule 1.7 correctly identifies any ofsuch facilities and locations that are not owned by a Borrower and setsforth the names of the owners and lessors or sublessors of suchfacilities and locations. Each Borrower covenants and agrees that itwill not (i) maintain any Collateral at any location other than thoselocations listed for such Borrower on Schedule 1.7 (other than(A) locations of Collateral consisting solely of real property at whichno Borrower has any operations, (B) locations of Inventory which havebeen described to the Agent in writing (including, without limitation,in connection with the delivery of a Borrowing Base Certificate), (C)locations of Collateral (other than Inventory and Eligible FixedAssets) which have been disclosed to the Agent pursuant to the thenmost recent Semi-Annual Location Schedule delivered to the Agentpursuant hereto, and (D) locations of Collateral described in the lastproviso of this Section 1.7(c)), and/or (ii) change the stateof organization or the location of its chief executive office from thelocation identified in Schedule 1.7, unless it gives the Agentat least thirty (30) days’ prior written notice thereof andexecutes any and all financing statements and other documents that theAgent reasonably requests in connection therewith. In addition, within45 days after the end of each six (6) calendar month period, theBorrowers shall deliver to the Agent a schedule (a‘‘Semi-Annual Location Schedule’’)which lists the locations of the Collateral; provided that theBorrowers shall not be required to include in such Semi-Annual LocationSchedule any location that has not at any time in the previous sixmonths contained Collateral with a fair market value in excess of$1,000,000.

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(b)    Section1.7(g) of the Loan Agreement is hereby amended by amending andrestating clause (2) thereof to read in its entirety as follows:‘‘(2) if requested by the Agent, an aging of theBorrowers’ accountspayable;’’

(c)    Section1.7(o)(5) of the Loan Agreement is hereby amended by adding thewords ‘‘and such infringement, misappropriation ordilution would reasonably be expected to have a Material AdverseEffect,’’ after the words ‘‘diluted by athird party,’’ located in the third linethereof.

(d)    Section 5.2(b) of theLoan Agreement is hereby amended by adding the words‘‘(or forty-five (45) days after a month which ends atthe end of a Fiscal Quarter)’’ after the words‘‘after the end of each month’’ located inthe second line thereof.

(e)    Section5.2(f) of the Loan Agreement is hereby amended by replacing thewords ‘‘Not less than forty-five (45)days’’ with the words ‘‘Not more thanforty-five (45) days’’ located in the first linethereof.

(f)    Section 7.5(b) of theLoan Agreement is hereby amended by deleting the word‘‘sole’’ which appears immediately beforethe words ‘‘loss payee’’ in the third linethereof.

(g)    Section 7.6 of theLoan Agreement is hereby amended by deleting the amount‘‘$20,000,000’’ which appears therein andinserting ‘‘$30,000,000’’ in itsplace.

(h)    Section 7.9 of the LoanAgreement is hereby amended by deleting the amount‘‘$20,000,000’’ which appears therein andinserting ‘‘$30,000,000’’ in itsplace.

(i)    Section 7.22 of theLoan Agreement is hereby amended and restated in its entirety to readas follows:

|  |            |                                                                                                                                                                                                                                           |
|--|------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|  | 7.22  | Minimum AdjustedCore EBITDA.     The Borrowers on a consolidated basis shallhave, at the end of each calendar month, Adjusted Core EBITDA for thetwelve calendar month period then ended of not less than$70,000,000. |

(j)    Section 13.7 ofthe Loan Agreement is hereby amended by deleting the amount‘‘$750’’ which appears therein andinserting ‘‘$800’’ in itsplace.

(k)    The definition of‘‘Cash Equivalents’’ is herebyamended by amending and restating clause (b) thereof in its entirety asfollows: ‘‘(b) commercial paper issued in the UnitedStates of America and rated at least A-1 or P-1 by at least onenationally recognized rating organization and money market funds ratedat least AAA, Aaa or other equivalent of highest rating by at least onenationally recognized ratingorganization,’’.

(l)    Thedefinition of ‘‘RestrictedInvestment’’ is hereby amended by deleting the word‘‘and’’ located prior to the words‘‘(n) other Investments not otherwisepermitted’’ and by inserting at the end of suchdefinition the following: ‘‘; and (o) Investments inAlltech Associates, Inc. (the ‘‘AlltechInvestments’’) in an aggregate outstanding amountnot to exceed $10,000,000, and any other Alltech Investments in excessthereof so long as immediately after giving effect to any such AlltechInvestments, Availability equals or is greater than $75,000,000 and theaggregate outstanding amount of Alltech Investments does not exceed$25,000,000.’’

(m)    Annex A tothe Loan Agreement is hereby amended by amending and restating in theirentirety the followingdefinitions:

‘‘BorrowingBase’’ means, at any time, an amount equal to (a)the sum of (A) eighty-five percent (85%) of the Net Amount ofEligible Accounts; plus (B) sixty percent (60%) of thevalue of Eligible Inventory; plus (C) up to the lesser of (i)$125,000,000 or (ii) the sum of (x) fifty percent (50%) of theAppraised Value of Eligible Fixed Assets, other than the ColumbiaProperty; plus (y) seventy-five percent (75%) of theAppraised Columbia Property Value; minus (b) Reservesfrom time to time established by the Agent in its reasonable creditjudgment after consultation with the BorrowerRepresentative.

‘‘StatedTermination Date’’ means April  1,2008.

(n)    Annex A to the Loan Agreement ishereby amended by deleting the following defined terms in theirentirety:

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‘‘AdjustedNet Earnings fromOperations’’

‘‘EBITDAR’’

‘‘RestructuringCosts’’

(o)    Annex A to theLoan Agreement is hereby amended by inserting the following definitionsin their proper alphabeticalorder:

‘‘Adjusted CoreEBITDA’’ means the sum of (a) net sales from CoreOperations, minus (b) Total Core Costs, plus (c)interest and royalties received in cash, plus (d) depreciationand amortization relating to the CoreOperations.

‘‘Appraised ColumbiaProperty Value’’ means the appraised fair marketvalue of the Columbia Property as reflected in an appraisal prepared byan appraisal firm and reasonably satisfactory toAgent.

‘‘ColumbiaProperty’’ means that certain Real Estate owned bythe Borrowers and located at 7500 Grace Drive, Columbia, Maryland,21044.

‘‘CoreOperations’’ means the Davison Chemicals andPerformance Chemicals business segments of theBorrowers.

‘‘FiscalQuarter’’ means any of the quarterly accountingperiods of Borrowers, ending on March  31, June  30,September  30 and December  31 of eachyear.

‘‘Total CoreCosts’’ means the sum of (a) cost of goods sold,plus (b) selling, general and administrative expenses,plus (c) depreciation and amortization, plus (d)research and development expenses, plus (e) net pensionexpense, plus (f) other (income)/expense, in each case of theCore Operations of the Borrowers on a consolidated basis, plus(g) corporate expenses that support the Core Operations (provided thatTotal Core Costs shall not include (x) interest expense or (y) anynon-cash restructuring charges and/or non-cash charges caused by achange in law or accountingstandards).

2.    Limited Waiver.    Subject to the conditions precedent set forth below, the Agent and theLenders hereby waive any Default or Event of Default with respect toany Section of the Loan Agreement arising or existing on or prior tothe date hereof and to the extent caused solely by the event orcircumstances set forth opposite such Section on Annex Iattached hereto. This waiver shall be limited precisely as written andshall not be deemed to (i) be a consent to any amendment, waiver ormodification of any other term or condition of the Loan Agreement orany other Loan Document, except to the extent set forth herein or (ii)prejudice any right or remedy that the Agent or the Lenders may have ormay have in the future under or in connection with the Loan Agreementor any other Loan Document with respect to any Default or Event ofDefault not waived hereby.

3.    AmendmentFees.     The Borrowers jointly and severally agree to pay theAgent the fees described in that certain fee letter attached hereto asAnnex II (the ‘‘FeeLetter’’).

4.    LockboxAccount.     By no later than thirty (30) days after the date ofthe Amendment Order (as defined below), the Borrowers shall haveentered into a tri-party or similar agreement in form and substanceacceptable to Agent with respect to the lockbox account opened with JPMorgan Chase. Notwithstanding any provision in this Amendment to thecontrary, any failure of the Borrowers to fully comply with thisSection 4 shall constitute an Event of Default under the LoanAgreement.

5.    Conditions.     (a) ThisAmendment shall be effective upon satisfaction of the followingconditions precedent:

(i)    This Amendmentshall have been executed by each party hereto;and

(ii)    The Agent shall have received acertificate from the chief financial officer of the Company certifyingthat (i) immediately after giving effect to this Amendment, allrepresentations and warranties made hereunder, in the Loan Agreementand in the other Loan Documents shall be true and correct as if made onthe date hereof, (ii) the Borrowers 

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have performed and complied with allcovenants, agreements and conditions contained herein which arerequired to be performed or complied with by the Borrowers on or beforethe date hereof and (iii) no Default or Event of Default shall haveoccurred and be continuing after giving effect to thisAmendment.

|  |           |                                                                               |
|--|-----------|-------------------------------------------------------------------------------|
|  | (b)  | The following shall beconditions precedent to the execution of thisAmendment: |

(i)    The Agent shall have received(i) copies of the articles of incorporation or certificates offormation or other charter documents of each Borrower, (ii) copies ofthe bylaws or other similar agreement and all amendments thereto ofeach Borrower, (iii) copies of resolutions of the Board of Directors orsimilar managing body of each Borrower approving and adopting thisAmendment, the transactions contemplated herein and authorizingexecution and delivery thereof, in each case, of each Borrower andcertified by a secretary or assistant secretary of the Company to betrue and correct and in force and effect as of the date hereof, (iv) acertificate of the Secretary or Assistant Secretary (or equivalentthereof) of each Borrower certifying as to the incumbency of theofficers of each Borrower, and (v) an original, duly certified as of acurrent date by the applicable Secretary of State, of a good standingcertificate issued by the Secretary of the state of incorporation ororganization of each Borrower;

(ii)    TheBorrowers shall have paid the fees described in the Fee Letter and allother fees and expenses of the Agent and the Attorney Costs incurred inconnection with this Amendment and any of the Loan Documents and thetransactions contemplated thereby to the extentinvoiced;

(iii)    The Agent shall havereceived evidence, in form, scope, and substance, reasonablysatisfactory to the Agent, of all insurance coverage as required by theLoan Agreement;

(iv)    The Agent and theLenders shall have had an opportunity, if they so choose, to examinethe books of account and other records and files of the Borrowers andto make copies thereof, and to conduct a field examination and audit ofthe Collateral which shall include, without limitation, updated desktopfixed asset appraisals, verification of Inventory, Accounts, and theBorrowing Base, and in each case the results of such examination andaudit shall have been satisfactory to the Agent and the Lenders in allrespects;

(v)    The Agent shall have receiveda fair market value appraisal of the Columbia Property (provided thatit shall not be a condition precedent to the execution of thisAmendment that the Agent receive a fair market value appraisal of theother Land and Buildings listed on Schedule A-2), and theresults of such appraisal shall have been satisfactory to the Agent andthe Lenders in all respects;

(vi)    Allproceedings taken in connection with the execution of this Amendmentand all documents and papers relating thereto shall be satisfactory inform, scope, and substance to the Agent and the Lenders;and

(vii)    The Agent shall have received acopy of the signed order (the ‘‘AmendmentOrder’’) of the Bankruptcy Court in substantiallythe form attached hereto as Annex III authorizing andapproving the transactions contemplated hereby. The Amendment Order (i)shall be in form and substance satisfactory to the Agent, (ii) shall becertified by the Clerk of the Bankruptcy Court as having been dulyentered, (iii) shall approve the payment by the Borrowers of all of thefees set forth in the Fee Letter, and (iv) shall be in full force andeffect and shall not have been vacated, reversed, modified, amended orstayed.

6.    Reference to and Effect Upon theLoan Agreement.

(a)    Except asspecifically amended above, the Loan Agreement and the other LoanDocuments shall remain in full force and effect and are hereby ratifiedand confirmed.

(b)    Upon the effectivenessof this Amendment, each reference in the Loan Agreement to‘‘this Agreement’’,‘‘hereunder’’,‘‘hereof’’,‘‘herein’’ or words of similar import shallmean and be a reference to the Loan Agreement as amendedhereby.

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7.    DefinedTerms.     Except as otherwise defined herein, all defined termsherein shall have the meanings ascribed thereto in the LoanAgreement.

8.    Governing Law.     THISAMENDMENT SHALL BE INTERPRETED AND THE RIGHTS AND LIABILITIES OF THEPARTIES HERETO DETERMINED IN ACCORDANCE WITH THE INTERNAL LAWS(PROVIDED THAT PERFECTION ISSUES WITH RESPECT TO ARTICLE 9 OF THE UCCMAY GIVE EFFECT TO APPLICABLE CHOICE OR CONFLICT OF LAW RULES SET FORTHIN ARTICLE 9 OF THE UCC) OF THE STATE OF NEW YORK TO THE EXTENT NOTPREEMPTED BY FEDERAL BANKRUPTCY LAWS; PROVIDED THAT THE AGENT AND THELENDERS SHALL RETAIN ALL RIGHTS ARISING UNDER FEDERALLAW.

9.    Headings.     Section headingsin this amendment are included herein for convenience of reference onlyand shall not constitute a part of this Amendment for any otherpurposes.

10.    Severability.     If anyprovision of this Amendment shall be prohibited by or invalid underapplicable law, such provision shall be ineffective to the extent ofsuch prohibition or invalidity, without invalidating the remainder ofsuch provision or the remaining provisions of thisAmendment.

11.    Acceptance ofSignatures.     The parties agree that this Amendment will beconsidered signed when the signature of a party is delivered byfacsimile or electronic mail transmission. Such facsimile or electronicmail signature shall be treated in all respects as having the sameeffect as an originalsignature.

12.    Counterparts.     ThisAmendment may be executed in any number of counterparts, each of whichwhen so executed shall be deemed an original, but all such counterpartsshall constitute one and the sameinstrument.

(Signature PagesFollow)

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INWITNESS WHEREOF, this Amendment has been duly executed as of the datefirst written above.

|  | BANK OF AMERICA, N.A.,as Agentand Lender |
|--|------------------------------------------|

|  | By:            /s/Edmundo Kahn                Name:     EdmundoKahn                Title:        VicePresident                 |
|--|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

    

|  |  |            |
|--|--|------------|
|  |  | BORROWERS: |
|  |  |            |

|  |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|--|--|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|  |  | W.R. Grace & Co.A-1 Bit & Tool Co., Inc.Alewife BostonLtd.Alewife Land CorporationAmicon, Inc.CB Biomedical,Inc.CCHP, Inc.Coalgrace, Inc.Coalgrace II,Inc.Creative Food 'N Fun CompanyDarex Puerto Rico,Inc.Del Taco Restaurants, Inc.Ecarg, Inc.Five AlewifeBoston Ltd.G C Limited Partners I, Inc.G C Management,Inc.GEC Management CorporationGN Holdings, Inc.GPCThomasville Corp.Gloucester New Communities Company,Inc.Grace A-B Inc.Grace A-B II Inc.Grace ChemicalCompany of CubaGrace Culinary Systems, Inc.Grace DrillingCompanyGrace Energy CorporationGrace Environmental,Inc.Grace Europe, Inc.Grace H-GInc. |
|  |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |

[Signature Pageto Amendment No. 4 to Post-Petition Loan and SecurityAgreement]

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|  |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|--|--|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|  |  | Grace H-G IIInc.Grace Hotel Services CorporationGrace InternationalHoldings, Inc.Grace Offshore CompanyGrace PARCorporationGrace Petroleum Libya IncorporatedGrace TarponInvestors, Inc.Grace Ventures Corp.Grace Washington,Inc.W. R. Grace Capital CorporationW. R. Grace &Co.-Conn.W. R. Grace Land CorporationGracoal,Inc.Gracoal II, Inc.Guanica-Caribe Land DevelopmentCorporationHanover Square CorporationHomco International,Inc.Kootenai Development CompanyL B Realty,Inc.Litigation Management, Inc.Monolith Enterprises,IncorporatedMonroe Street, Inc.MRA Holdings Corp.MRAIntermedco, Inc.MRA Staffing Systems, Inc.Remedium Group,Inc.Southern Oil, Resin & Fiberglass, Inc.Water StreetCorporation, each as a Debtor and aDebtor-in-Possession    By: /s/ Robert M.TarolaIts Duly AuthorizedSignatory |
|  |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |

[SignaturePage to Amendment No. 4 to Post-Petition Loan and SecurityAgreement]

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|  |  |                                                  |
|--|--|--------------------------------------------------|
|  |  | CC Partners, as a Debtorand Debtor-in-Possession |
|  |  |                                                  |

|  |  |  |                                                |  |
|--|--|--|------------------------------------------------|--|
|  |  |  | By:MRA StaffingSystems, Inc., a GeneralPartner |
|  |  |  |

|  |  |  |                       |  |
|--|--|--|-----------------------|--|
|  |  |  | By:/s/ RobertM.Tarola |
|  |  |  |

|  |  |  |                                                                                                                                                                                                                                                                                                                              |  |
|--|--|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|
|  |  |  | Its:                                                     |
|  |  |  |

|  |  |  |                                |  |
|--|--|--|--------------------------------|--|
|  |  |  | By:CCHP,Inc., a GeneralPartner |
|  |  |  |

|  |  |  |                       |  |
|--|--|--|-----------------------|--|
|  |  |  | By:/s/ RobertM.Tarola |
|  |  |  |

|  |  |  |                                                                                                                                                                                                                                                                                                                              |  |
|--|--|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|
|  |  |  | Its:                                                     |
|  |  |  |

|  |  |                                                                                                               |
|--|--|---------------------------------------------------------------------------------------------------------------|
|  |  | AxialBasin Ranch Company, as a Debtor and        Debtor-in-Possession |
|  |  |                                                                                                               |

|  |  |  |                                        |  |
|--|--|--|----------------------------------------|--|
|  |  |  | By:GraceA-B II, Inc., a GeneralPartner |
|  |  |  |

|  |  |  |                       |  |
|--|--|--|-----------------------|--|
|  |  |  | By:/s/ RobertM.Tarola |
|  |  |  |

|  |  |  |                                                                                                                                                                                                                                                                                                                              |  |
|--|--|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|
|  |  |  | Its:                                                     |
|  |  |  |

|  |  |  |                                     |  |
|--|--|--|-------------------------------------|--|
|  |  |  | By:GraceA-B, Inc., a GeneralPartner |
|  |  |  |

|  |  |  |                       |  |
|--|--|--|-----------------------|--|
|  |  |  | By:/s/ RobertM.Tarola |
|  |  |  |

|  |  |  |                                                                                                                                                                                                                                                                                                                              |  |
|--|--|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|
|  |  |  | Its:                                                     |
|  |  |  |

|  |  |                                                                                                                    |
|--|--|--------------------------------------------------------------------------------------------------------------------|
|  |  | Hayden-GulchWest Coal Company, as a Debtor and        Debtor-in-Possession |
|  |  |                                                                                                                    |

|  |  |  |                                      |  |
|--|--|--|--------------------------------------|--|
|  |  |  | By:GraceH-G, Inc., a General Partner |
|  |  |  |

|  |  |  |                        |
|--|--|--|------------------------|
|  |  |  | By:/s/ Robert M.Tarola |
|  |  |  |

|  |  |  |                                                                                                                                                                                                                                                                                                                              |  |
|--|--|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|
|  |  |  | Its:                                                     |
|  |  |  |

|  |  |  |                                        |  |
|--|--|--|----------------------------------------|--|
|  |  |  | By:GraceH-G II, Inc., a GeneralPartner |
|  |  |  |

|  |  |  |                                               |  |
|--|--|--|-----------------------------------------------|--|
|  |  |  | By:/s/ RobertM.Tarola     |
|  |  |  |

|  |  |  |                                                                                                                                                                                                                                                                                                                              |  |
|--|--|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|
|  |  |  | Its:                                                     |
|  |  |  |

|  |  |                                                      |
|--|--|------------------------------------------------------|
|  |  | H-GCoal Company, as a Debtor andDebtor-in-Possession |
|  |  |                                                      |

|  |  |  |                                      |  |
|--|--|--|--------------------------------------|--|
|  |  |  | By:Coalgrace, Inc., aGeneral Partner |
|  |  |  |

|  |  |  |                       |  |
|--|--|--|-----------------------|--|
|  |  |  | By:/s/Robert M.Tarola |
|  |  |  |

|  |  |  |                                                                                                                                                                                                                                                                                                                              |  |
|--|--|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|
|  |  |  | Its:                                                     |
|  |  |  |

|  |  |  |                                        |  |
|--|--|--|----------------------------------------|--|
|  |  |  | By:CoalgraceII, Inc., a GeneralPartner |
|  |  |  |

|  |  |  |                       |  |
|--|--|--|-----------------------|--|
|  |  |  | By:/s/ RobertM.Tarola |
|  |  |  |

|  |  |  |                                                                                                                                                                                                                                                                                                                              |  |
|--|--|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|
|  |  |  | Its:                                                     |
|  |  |  |

|  |  |                                                                                                         |
|--|--|---------------------------------------------------------------------------------------------------------|
|  |  | Deweyand Almy, LLC, as a Debtor and        Debtor-in-Possession |
|  |  |                                                                                                         |

|  |  |  |                                               |  |
|--|--|--|-----------------------------------------------|--|
|  |  |  | By:W.R. Grace & Co.-Conn., its solemember |
|  |  |  |

|  |  |  |                       |  |
|--|--|--|-----------------------|--|
|  |  |  | By:/s/ RobertM.Tarola |
|  |  |  |

|  |  |  |                                                                                                                                                                                                                                                                                                                              |  |
|--|--|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|
|  |  |  | Its:                                                     |
|  |  |  |

[SignaturePage to Amendment No. 4 to Post-Petition Loan and SecurityAgreement]

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|  |  |                                                                               |
|--|--|-------------------------------------------------------------------------------|
|  |  | GMAC COMMERCIAL FINANCELLC (successor by merger to GMAC Commercial CreditLLC) |
|  |  |                                                                               |

|  |  |                                               |
|--|--|-----------------------------------------------|
|  |  | By:/s/ Harvey WinterTitle: VicePresident |
|  |  |                                               |

|  |  |          |                                                                                                              |
|--|--|----------|--------------------------------------------------------------------------------------------------------------|
|  |  | Address: | 1290 Avenueof the Americas3rd FloorNew York, New York10104 Attention: Harvey Winter Facsimile: (212)884-7088 |
|  |  |          |

|  |  |                           |
|--|--|---------------------------|
|  |  | GE COMMERCIAL FINANCE LLC |
|  |  |                           |

|  |  |                                                                                  |
|--|--|----------------------------------------------------------------------------------|
|  |  | By:/s/ Brian P. SchwinnName: Brian P.SchwinnTitle: Duly AuthorizedSignatory |
|  |  |                                                                                  |

|  |  |          |                               |
|--|--|----------|-------------------------------|
|  |  | Address: | 201 Merritt7Norwalk, CT 06856 |
|  |  |          |

|  |  |                              |
|--|--|------------------------------|
|  |  | THE CIT GROUP/BUSINESSCREDIT |
|  |  |                              |

|  |  |                                               |
|--|--|-----------------------------------------------|
|  |  | By: /s/ Steve SchuitTitle: VicePresident |
|  |  |                                               |

|  |  |          |                                                    |
|--|--|----------|----------------------------------------------------|
|  |  | Address: | 1211 Avenueof the AmericasNew York, New York 10036 |
|  |  |          |

|  |  |                               |
|--|--|-------------------------------|
|  |  | PNC BANK,NATIONAL ASSOCIATION |
|  |  |                               |

|  |  |                                               |
|--|--|-----------------------------------------------|
|  |  | By: /s/ BrianConwayTitle: Vice President |
|  |  |                                               |

|  |  |          |                                                                                                                     |
|--|--|----------|---------------------------------------------------------------------------------------------------------------------|
|  |  | Address: | Two Tower Center Blvd.8thFloorEast Brunswick, New Jersey 08816Attention: JosephineGriffin Facsimile: (732) 220-4393 |
|  |  |          |

|  |  |             |
|--|--|-------------|
|  |  | AMSOUTHBANK |
|  |  |             |

|  |  |                                                       |
|--|--|-------------------------------------------------------|
|  |  | By: /s/ Frank D. MarsicanoTitle:Attorney in Fact |
|  |  |                                                       |

|  |  |          |                                                      |
|--|--|----------|------------------------------------------------------|
|  |  | Address: | 599Lexington Avenue45th FloorNew York, New York10022 |
|  |  |          |

|  |  |            |                                                             |
|--|--|------------|-------------------------------------------------------------|
|  |  | Attention: | FrankMarsicanoAmSouth Capital Corp.Facsimile: (212)935-7458 |
|  |  |            |

[SignaturePage to Amendment No. 4 to Post-Petition Loan and SecurityAgreement]

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ANNEX III

AMENDMENTORDER

Annex III

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IN THE UNITED STATES BANKRUPTCYCOURTFOR THE DISTRICT OF DELAWARE

|             |                                    |
|-------------|------------------------------------|
| Inre:  | )    Chapter11 |

|        |   |
|--------|---|
|   | ) |

|                                     |                                                 |
|-------------------------------------|-------------------------------------------------|
| W. R. GRACE &CO., etal.,1  | )    Case No. 01-01139(JKF) |

|        |   |
|--------|---|
|   | ) |

|                |                                              |
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| Debtors.  | )    JointlyAdministered |

ORDER AUTHORIZING DEBTORS TO FURTHEREXTENDAND MODIFY DEBTOR-IN-POSSESSIONFINANCING

Upon consideration of the Debtors’ Motionfor Authority to Further Extend and Modify Debtor-in-PossessionFinancing (the ‘‘Motion’’); and due andproper notice of the Motion having been given; and it appearing thatthe relief requested in the Motion is in the best interests of theDebtors, their estates and creditors, it is hereby

ORDERED thatthe Motion is granted; and it is further

ORDERED that the Debtorsare hereby authorized to enter into theAmendment,2attached as Exhibit A to the Motion, to the Post-Petition Loan andSecurity Agreement; and it is further

ORDERED that the Debtorsare authorized to take whatever action may be necessary to consummatethe transactions contemplated by this Order; and it isfurther

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|  | 1    TheDebtors consist of the following 62 entities: W. R. Grace & Co.(f/k/a Grace Specialty Chemicals, Inc.), W. R. Grace & Co.-Conn.,A-1 Bit & Tool Co., Inc., Alewife Boston Ltd., Alewife LandCorporation, Amicon, Inc., CB Biomedical, Inc. (f/k/a Circe Biomedical,Inc.), CCHP, Inc., Coalgrace, Inc., Coalgrace II, Inc., Creative Food‘N Fun Company, Darex Puerto Rico, Inc., Del Taco Restaurants,Inc., Dewey and Almy, LLC (f/k/a Dewey and Almy Company), Ecarg, Inc.,Five Alewife Boston Ltd., G C Limited Partners I, Inc. (f/k/a GraceCocoa Limited Partners I, Inc.), G C Management, Inc. (f/k/a GraceCocoa Management, Inc.), GEC Management Corporation, GN Holdings, Inc.,GPC Thomasville Corp., Gloucester New Communities Company, Inc., GraceA-B Inc., Grace A-B II Inc., Grace Chemical Company of Cuba, GraceCulinary Systems, Inc., Grace Drilling Company, Grace EnergyCorporation, Grace Environmental, Inc., Grace Europe, Inc., Grace H-GInc., Grace H-G II Inc., Grace Hotel Services Corporation, GraceInternational Holdings, Inc. (f/k/a Dearborn International Holdings,Inc.), Grace Offshore Company, Grace PAR Corporation, Grace PetroleumLibya Incorporated, Grace Tarpon Investors, Inc., Grace Ventures Corp.,Grace Washington, Inc., W. R. Grace Capital Corporation, W. R. GraceLand Corporation, Gracoal, Inc., Gracoal II, Inc., Guanica-Caribe LandDevelopment Corporation, Hanover Square Corporation, HomcoInternational, Inc., Kootenai Development Company, L B Realty, Inc.,Litigation Management, Inc. (f/k/a GHSC Holding, Inc., Grace JVH, Inc.,Asbestos Management, Inc.), Monolith Enterprises, Incorporated, MonroeStreet, Inc., MRA Holdings Corp. (f/k/a Nestor-BNA HoldingsCorporation), MRA Intermedco, Inc. (f/k/a Nestor-BNA, Inc.), MRAStaffing Systems, Inc. (f/k/a British Nursing Association, Inc.),Remedium Group, Inc. (f/k/a Environmental Liability Management, Inc.,E&C Liquidating Corp., Emerson & Cuming, Inc.), Southern Oil,Resin & Fiberglass, Inc., Water Street Corporation, Axial BasinRanch Company, CC Partners (f/k/a Cross Country Staffing), Hayden-GulchWest Coal Company, H-G Coal Company. |

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|  | 2    Capitalizedterms used but not defined herein shall have the meaning ascribed tothem in the Motion. |

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ORDERED that the Court shall retainjurisdiction to hear and determine all matters arising from or relatingto the implementation of this Order; and it is further

ORDEREDthat this Order is effective immediately upon itsentry.

Wilmington, Delaware

Dated:    March  24,2006

|  | /s/ Judith K.FitzgeraldHonorable Judith K. FitzgeraldU. S. BankruptcyJudge |
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