Document:

1997 Directors' Fee Plan

 Exhibit 10.4 
 CALGON CARBON CORPORATION 
 1997 DIRECTORS’ FEE PLAN 
 (as amended through January 1, 2005) 
 SECTION 1 
 PURPOSE; RESERVATION OF SHARES 
 The purposes of the 1997 Directors’ Fee Plan (the “Plan”) are to provide each Director of Calgon Carbon Corporation (the “Corporation”) who is not also an employee of the Corporation or its
Subsidiaries (a “Director”) with payment alternatives for retainer (but not meeting) fees payable for future services as a member of the Board of Directors of the Corporation (hereinafter referred to as the “Board”) or as the
Chairman of any committee thereof (“Director Fees”) and to increase the identification of interests between such Directors and the stockholders of the Corporation by providing Directors the opportunity to elect to receive payment of
Director Fees in shares of Common Stock, par value $.01 per share, of the Corporation (“Common Stock”). For purposes of the Plan, the term “Subsidiary” means any corporation in an unbroken chain of corporations beginning with the
Corporation, if each of the corporations other than the last corporation in the unbroken chain owns stock possessing fifty percent (50%) or more of the total combined voting power of all classes of stock in one of the other corporations in the
chain. The aggregate number of shares of Common Stock which may be issued under Current Stock Elections or credited to Deferred Stock Compensation Accounts for subsequent issuance under the Plan is limited to 100,000 shares, subject to adjustment
and substitution as set forth in Section 4(b). 
 SECTION 2 
 ELIGIBILITY 
 Any non-employee Director of the Corporation who is separately compensated in the form
of Director Fees for services on the Board or as the Chairman of any committee of the Board shall be eligible to participate in the Plan. 
 SECTION 3 
 DIRECTOR FEES; ELECTIONS 
 (a) Payment Date. Director Fees shall be paid by the Corporation on the twentieth day (or the next business day thereafter, if such day is not a business day) after the annual meeting of the Corporation in each
calendar year. If a Director dies or otherwise ceases service as a Director prior to the above-stated payment date, no such payment shall be made to the Director. 
 (b) Director Fee Payment Alternatives. For each calendar year beginning January 1, 1998, a Director may elect any one of the following alternatives for the payment of Director Fees:

 (1) to receive current payment in cash, on the date on which the Director Fees are payable, of all Director Fees in such
calendar year; 

 (2) to receive current payment in shares of Common Stock, on the date on which the
Director Fees are payable, of all Director Fees in such calendar year (a “Current Stock Election”); 
 (3) to defer
payment of all the Director Fees in such calendar year for subsequent payment in shares of Common Stock (a “Stock Deferral Election”). 
 (c) Filing and Effectiveness of Elections. The election by a Director to receive payment of Director Fees other than in cash on the date on which the Director Fees are otherwise payable is made by filing with the Secretary of the
Corporation a Notice of Election in the form prescribed by the Corporation (an “Election”). In order to be effective for any calendar year, an Election must be received by the Secretary of the Corporation on or before December 31 of
the preceding calendar year, except that if a Director files a Notice of Election on or before five days subsequent to the Director’s initial election to the office of Director, or any subsequent re-election if immediately prior thereto such
person was not serving as a Director, the Election shall be effective on the date of filing with respect to Director Fees payable for any portion of the calendar year which remains at the date of such filing. An Election may not be modified or
terminated after the beginning of a calendar year for which it is effective. Unless modified or terminated by filing a new Notice of Election on or before December 31 immediately preceding the calendar year for which such modification or
termination is effective, an Election shall be effective for and apply to Director Fees payable for each subsequent calendar year. Director Fees earned at any time for which an Election is not effective shall be paid in cash on the date when the
Director Fees are otherwise payable. Any Election shall terminate on the date a Director ceases to be a member of the Board. 
 (d)
Current Stock Elections. During the period a Current Stock Election is effective, all Director Fees payable shall be paid by the issuance to the Director of a number of whole shares of Common Stock equal to (x) the cash amount of the
Director Fees payable divided by (y) the Fair Market Value of one share of the Common Stock, as defined in Section 10 hereof, on the date on which such Director Fees are payable. Any fractional shares shall be rounded down to the next
whole share. The Corporation shall issue share certificates to the Director for the shares of Common Stock acquired. As of the date on which the Director Fees are payable in shares of Common Stock, the Director shall be a stockholder of the
Corporation with respect to such shares. 
 (e) Stock Deferral Elections. Director Fees deferred pursuant to a Stock Deferral Election
shall be deferred and paid as provided in Sections 4 and 5. A Stock Deferral Election shall apply to all Director Fees otherwise payable with respect to a calendar year, or portion thereof, for which such Stock Deferral Election is effective.

 SECTION 4 
 DEFERRED STOCK
COMPENSATION ACCOUNT 
 (a) General. The amount of any Director Fees deferred in accordance with a Stock Deferral Election shall
be credited to a deferred stock compensation account maintained by the Corporation in the name of the Director (a “Deferred Stock Compensation Account”). A separate Deferred Stock Compensation Account shall be maintained for each calendar
year for which a Director has elected a different number of payment installments or as otherwise determined by the Board. On each date on which Director Fees are otherwise payable and a Stock Deferral Election is effective for a Director, the
Director’s Deferred Stock Compensation Account for that calendar year shall be credited with a number of shares of Common Stock (including fractional shares) equal to (x) the cash amount of the Director Fees payable divided by (y) the
Fair Market Value of one share of the Common Stock, as defined in Section 10 hereof, on the date on which such Director Fees are payable. If a dividend or distribution is paid on the Common Stock in cash or property other than Common Stock, on
the date 

  

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of payment of the dividend or distribution to holders of the Common Stock each Deferred Stock Compensation Account shall be credited with a number of shares
of Common Stock (including fractional shares) equal to the number of shares of Common Stock credited to such Account on the date fixed for determining the stockholders entitled to receive such dividend or distribution times the amount of the
dividend or distribution paid per share of Common Stock divided by the Fair Market Value of one share of the Common Stock, as defined in Section 10 hereof, on the date on which the dividend or distribution is paid. If the dividend or
distribution is paid in property, the amount of the dividend or distribution shall equal the fair market value of the property on the date on which the dividend or distribution is paid. The Deferred Stock Compensation Account of a Director shall be
charged on the date of distribution with any distribution of shares of Common Stock made to the Director from such Account pursuant to Section 4(c) hereof. 
 (b) Adjustment and Substitution. The number of shares of Common Stock credited to each Deferred Stock Compensation Account, and the number of shares of Common Stock available for issuance or crediting under the
Plan in each calendar year in accordance with Section 1 hereof, shall be proportionately adjusted to reflect any dividend or other distribution on the outstanding Common Stock payable in shares of Common Stock or any split or consolidation of
the outstanding shares of Common Stock. If the outstanding Common Stock shall, in whole or in part, be changed into or exchangeable for a different class or classes of securities of the Corporation or securities of another corporation or cash or
property other than Common Stock, whether through reorganization, reclassification, recapitalization, merger, consolidation or otherwise, the Board shall adopt such amendments to the Plan as it deems necessary to carry out the purposes of the Plan,
including the continuing deferral of any amount of any Deferred Stock Compensation Account. 
 (c) Manner of Payment. The balance of a
Director’s Deferred Stock Compensation Account will be paid in shares of Common Stock to the Director or, in the event of the Director’s death, to the Director’s designated beneficiary, in accordance with the Stock Deferral Election.
A Director may elect at the time of filing of the Notice of Election for a Stock Deferral Election to receive payment of the shares of Common Stock credited to the Director’s Deferred Stock Compensation Account in annual installments rather
than a lump sum, provided that the payment period for installment payments shall not exceed ten years following the Payment Commencement Date as described in Section 5 hereof. The number of shares of Common Stock distributed in each installment
shall be determined by multiplying (i) the number of shares of Common Stock in the Deferred Stock Compensation Account on the date of payment of such installment, by (ii) a fraction, the numerator of which is one and the denominator of
which is the number of remaining unpaid installments, and by rounding such result down to the nearest whole number of shares. The balance of the number of shares of Common Stock in the Deferred Stock Compensation Account shall be appropriately
reduced in accordance with Section 4(a) hereof to reflect the installment payments made hereunder. Shares of Common Stock remaining in a Deferred Stock Compensation Account pending distribution pursuant to this Section 4(c) shall continue
to be credited with respect to dividends or distributions paid on the Common Stock pursuant to Section 4(a) hereof and shall be subject to adjustment pursuant to Section 4(b) hereof. If a lump sum payment or the final installment payment
hereunder would result in the issuance of a fractional share of Common Stock, such fractional share shall not be issued and cash in lieu of such fractional share shall be paid to the Director based on the Fair Market Value of a share of Common
Stock, as defined in Section 10 hereof, on the date immediately preceding the date of such payment. The Corporation shall issue share certificates to the Director, or the Director’s designated beneficiary, for the shares of Common Stock
distributed hereunder. As of the date on which the Director is entitled to receive payment of shares of Common Stock, a Director shall be a stockholder of the Corporation with respect to such shares. 
  

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 SECTION 5 
 PAYMENT COMMENCEMENT DATE 
 Payment of amounts in a Deferred Stock Compensation Account shall
commence on March 30 (or if March 30 is not a business day, on the first preceding business day) of the calendar year following the calendar year during which the Director ceases to be a member of the Board for any reason, including death
or disability. 
 SECTION 6 
 BENEFICIARY DESIGNATION 
 A Director may designate, in the Beneficiary Designation form prescribed by the Corporation, any
person to whom payments of shares of Common Stock are to be made if the Director dies before receiving payment of all amounts due hereunder. A beneficiary designation will be effective only after the signed beneficiary designation form is filed with
the Secretary of the Corporation while the Director is alive and will cancel all beneficiary designations signed and filed earlier. If the Director fails to designate a beneficiary, or if all designated beneficiaries of the Director die before the
Director or before complete payment of all amounts due hereunder, any remaining unpaid amounts shall be paid in one lump sum to the estate of the last to die of the Director or the Director’s designated beneficiaries, if any. 
 SECTION 7 
 NON-ALIENABILITY OF BENEFITS

 Neither the Director nor any beneficiary designated by the Director shall have the right to, directly or indirectly, alienate, assign,
transfer, pledge, anticipate or encumber (except by reason of death) any amount that is or may be payable hereunder, nor shall any such amount be subject to anticipation, alienation, sale, transfer, assignment, pledge, encumbrance, attachment, or
garnishment by creditors of the Director or the Director’s designated beneficiary or to the debts, contracts, liabilities, engagements, or torts of any Director or designated beneficiary, or transfer by operation of law in the event of
bankruptcy or insolvency of the Director or any beneficiary, or any legal process. 
 SECTION 8 
 NATURE OF DEFERRED ACCOUNTS 
 Any
Deferred Stock Compensation Account and any cash fractional amount accumulated under Section 3(d) shall be established and maintained only on the books and records of the Corporation, and no assets or funds of the Corporation or the Plan or
shares of Common Stock of the Corporation shall be removed from the claims of the Corporation’s general or judgment creditors or otherwise made available until such amounts are actually payable to Directors or their designated beneficiaries as
provided herein. The Plan constitutes a mere promise by the Corporation to make payments in the future. The Directors and their designated beneficiaries shall have the status of, and their rights to receive a payment of cash or shares of Common
Stock under the Plan shall be no greater than the rights of, general unsecured creditors of the Corporation. No person shall be entitled to any voting rights with respect to shares credited to a Deferred Stock Compensation Account and not yet
payable to a Director or the Director’s designated beneficiary. The Corporation shall not be obligated under any circumstance to fund its financial obligations under the Plan, and the Plan is intended to constitute an unfunded plan for tax
purposes. However, the Corporation may, in its discretion, set aside funds in a trust or other vehicle, subject to the claims of its creditors, in order to assist it in 

  

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meeting its obligations under the Plan, if such arrangement will not cause the Plan to be considered a funded deferred compensation plan under the Internal
Revenue Code of 1986, as amended. 
 SECTION 9 
 ADMINISTRATION OF PLAN; HARDSHIP WITHDRAWAL 
 Full power and authority to construe, interpret, and
administer the Plan shall be vested in the Board. Decisions of the Board shall be final, conclusive, and binding upon all parties. Notwithstanding the terms of a Stock Deferral Election made by a Director hereunder, the Board may, in its sole
discretion, permit the withdrawal of shares credited to a Deferred Stock Compensation Account with respect to Director Fees previously payable, upon the request of a Director or the Director’s representative, or following the death of a
Director upon the request of a Director’s beneficiary or such beneficiary’s representative, if such Board determines that the Director or the Director’s beneficiary, as the case may be, is confronted with an unforeseeable emergency.
For this purpose, an unforeseeable emergency is a severe financial hardship of the Director or beneficiary resulting from an illness or accident of the Director or beneficiary, the Director’s or beneficiary’s spouse, or the Director’s
or beneficiary’s dependent (as defined in section 152(a) of the Code); loss of the Director’s or beneficiary’s property due to casualty; or other similar extraordinary and unforeseeable circumstances arising as a result of events
beyond the control of the Director or beneficiary. The Director or the Director’s beneficiary shall provide to such Board such evidence as the Board, in its discretion, may require to demonstrate that such emergency exists and financial
hardship would occur if the withdrawal were not permitted. The withdrawal shall be limited to the number of shares necessary to meet the emergency plus amounts necessary to pay taxes as a result of the distribution. Cash needs arising from
foreseeable events, such as the purchase or building of a house or education expenses, will not be considered to be the result of an unforeseeable financial emergency. Further, a hardship shall not be deemed to exist if it may be relieved
(i) through reimbursement or compensation by insurance or otherwise, (ii) by liquidation of the Director’s assets (to the extent such liquidation would not cause severe financial hardship to the Director) or (iii) by ceasing
deferrals under the Plan. Payment shall be made as soon as practicable after the Board approves the payment and determines the number of shares which shall be withdrawn, in a single lump sum from the portion of the Deferred Stock Compensation
Account with the longest number of installment payments first. No Director shall participate in any decision of the Board regarding such Director’s request for a withdrawal under this Section 9. 
 SECTION 10 
 FAIR MARKET VALUE

 Fair market value of the Common Stock shall be the mean between the following prices, as applicable, for the date as of which fair
market value is to be determined as quoted in The Wall Street Journal (or in such other reliable publication as the Board or its delegate, in its discretion, may determine to rely upon): (a) if the Common Stock is listed on the New York
Stock Exchange, the highest and lowest sales prices per share of the Common Stock as quoted in the NYSE-Composite Transactions listing for such date, (b) if the Common Stock is not listed on such exchange, the highest and lowest sales prices
per share of Common Stock for such date on (or on any composite index including) the principal United States securities exchange registered under the Securities Exchange Act of 1934, as amended (the “1934 Act”) on which the Common Stock is
listed, or (c) if the Common Stock is not listed on any such exchange, the highest and lowest sales prices per share of the Common Stock for such date on the National Association of Securities Dealers Automated Quotations System or any
successor system then in use (“NASDAQ”). If there are no such sale price quotations for the date as of which fair market value is to be determined but there are such sale price quotations within a reasonable period both before and after
such date, then fair market value shall be 

  

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determined by taking a weighted average of the means between the highest and lowest sales prices per share of the Common Stock as so quoted on the nearest
date before and the nearest date after the date as of which fair market value is to be determined. The average should be weighted inversely by the respective numbers of trading days between the selling dates and the date as of which fair market
value is to be determined. If there are no such sale price quotations on or within a reasonable period both before and after the date as of which fair market value is to be determined, then fair market value of the Common Stock shall be the mean
between the bona fide bid and asked prices per share of Common Stock as so quoted for such date on NASDAQ, or if none, the weighted average of the means between such bona fide bid and asked prices on the nearest trading date before and the nearest
trading date after the date as of which fair market value is to be determined, if both such dates are within a reasonable period. The average is to be determined in the manner described above in this Section 10. If the fair market value of the
Common Stock cannot be determined on the basis previously set forth in this Section 10 on the date as of which fair market value is to be determined, the Board or its delegate shall in good faith determine the fair market value of the Common
Stock on such date. Fair market value shall be determined without regard to any restriction other than a restriction which, by its terms, will never lapse. 
 SECTION 11 
 SECURITIES LAWS; ISSUANCE OF SHARES 
 The obligation of the Corporation to issue or credit shares of Common Stock under the Plan shall be subject to (i) the effectiveness of a
registration statement under the Securities Act of 1933, as amended, with respect to such shares, if deemed necessary or appropriate by counsel for the Corporation, (ii) the condition that the shares shall have been listed (or authorized for
listing upon official notice of issuance) upon each stock exchange, if any, on which the Common Stock shares may then be listed and (iii) all other applicable laws, regulations, rules and orders which may then be in effect. If, on the date on
which any shares of Common Stock would be issued pursuant to a Current Stock Election or credited to a Deferred Stock Compensation Account, sufficient shares of Common Stock are not available under the Plan or the Corporation is not obligated to
issue shares pursuant to this Section 11, then no shares of Common Stock shall be issued or credited but rather cash shall be paid if a Director has made Current Stock Election, and cash shall be credited to a deferral account if a Director has
made a Stock Deferral Election. The Board shall adopt appropriate rules and regulations to carry out the intent of the immediately preceding sentence if the need for such rules and regulations arises. 
 SECTION 12 
 GOVERNING LAW 

The provisions of this Plan shall be interpreted and construed in accordance with the laws of the Commonwealth of Pennsylvania. 
 SECTION 13 
 EFFECT OF THE PLAN ON THE RIGHTS

 OF CORPORATION AND STOCKHOLDERS 
 Nothing in the Plan shall confer any right to any person to continue as a Director of the Corporation or interfere with the rights of the stockholders of the Corporation or the Board to elect and remove Directors. 
  

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 SECTION 14 
 AMENDMENT AND TERMINATION 
 The right to amend the Plan at any time and from time to time and the
right to terminate the Plan at any time are hereby specifically reserved to the Board; provided that no amendment of the Plan shall (a) be made without stockholder approval if stockholder approval of the amendment is at the time required by the
rules of the New York Stock Exchange or any other stock exchange on which the Common Stock may then be listed, or (b) otherwise amend the Plan in any manner that would cause the shares of Common Stock issued or credited under the Plan not to
qualify for the exemption from Section 16(b) of the 1934 Act provided by Rule 16b-3. No amendment or termination of the Plan shall, without the written consent of the holder of shares of Common Stock issued or credited under the Plan, adversely
affect the rights of such holder with respect thereto. 
 Notwithstanding anything contained in the preceding paragraph or any other
provision of the Plan, the Board shall have the power to amend the Plan in any manner deemed necessary or advisable for shares of Common Stock issued or credited under the Plan to qualify for the exemption provided by Rule 16b-3 (or any successor
rule relating to exemption from Section 16(b) of the 1934 Act), and any such amendment shall, to the extent deemed necessary or advisable by the Board, be applicable to any outstanding shares of Common Stock theretofore issued or credited under
the Plan. 
 SECTION 15 
 EFFECTIVE DATE 
 The effective date and date of adoption of the Plan shall be December 8, 1997, the date of adoption of
the Plan by the Board. 
  

 -7-Amendment No. 1 to Calgon Carbon Corporation Senior Credit Facility

 Exhibit 10.7 
 EXECUTION VERSION 
 AMENDMENT NO. 1 TO AMENDED AND RESTATED CREDIT AGREEMENT 

THIS AMENDMENT NO. 1 TO AMENDED AND RESTATED CREDIT AGREEMENT, dated as of March 23, 2006 (this “Amendment”),
among the following: 
 (i) CALGON CARBON CORPORATION, a Delaware corporation (herein, together with its successors and
assigns, the “Borrower”); 
 (ii) the lending institutions signatory hereto (herein, together with its
or their successors and assigns, each a “Lender” and collectively, the “Lenders”); and 
 (iii) NATIONAL CITY BANK OF PENNSYLVANIA, a national banking association, as a Lender, a Letter of Credit Issuer, the Swing Line Lender, as the lead arranger and book manager, as the Administrative Agent (in
such capacity, the “Administrative Agent”), and the Collateral Agent. 
 PRELIMINARY STATEMENTS: 
 A. The Borrower, the Lenders, the Swing Lender and the Administrative Agent entered into the Amended and Restated Credit Agreement, dated as of
January 30, 2006 (as the same may from time to time be amended, restated, amended and restated or otherwise modified, the “Credit Agreement,” with the terms defined therein, or the definitions of which are incorporated
therein, being used herein as so defined). 
 B. The parties hereto desire to amend certain terms and provisions of the Credit Agreement, as
more fully set forth below. 
 NOW, THEREFORE, the parties hereby agree as follows: 
 1. AMENDMENTS. Effective on and as of the Amendment Effective Date (as defined in Section 4 of this Amendment): 
 1.1 Amended Annex. Annex XI to the Credit Agreement shall be amended and restated in its entirety as set forth on Exhibit 1 attached hereto.

 1.2 Amended Section. Section 10.8 of the Credit Agreement shall be amended and restated in its entirety to read as follows:

 “10.9 Fixed Charge Coverage Ratio. The Borrower will not at any time permit its Fixed Charge Coverage Ratio to be less than
1.10 to 1.00 for any Testing Period; provided, however, that for any Testing Period ending December 31, 2005, March 31, 2006, June 30, 2006 or September 30, 2006, the Borrower’s Fixed Charge
Coverage Ratio shall be calculated excluding from Consolidated Capital Expenditures the amount of Consolidated Reimbursable Capital Expenditures paid in cash during the applicable Testing Period; provided, further, that
to the extent the Borrower does not receive casualty and/or business interruption 

  

 1 

 
insurance proceeds in the full amount of such Consolidated Reimbursable Capital Expenditures by September 30, 2006, the Borrower’s Fixed Charge
Coverage Ratio for the Testing Period ending September 30, 2006 shall be calculated to include in Consolidated Capital Expenditures the amount of Consolidated Reimbursable Capital Expenditures paid in cash for such Testing Period to the extent
casualty and/or business interruption insurance proceeds have not been received.” 
 1.3 New Definition. Section 1.1 of the
Credit Agreement shall be amended to add the following definition in the appropriate alphabetical order: 
 ““Consolidated
Reimbursable Capital Expenditures” shall mean, for any period, the aggregate of all Consolidated Capital Expenditures made or incurred by the Borrower and its Subsidiaries during that period and that have been, or the Borrower believes
in good faith will be no later than September 30, 2006, reimbursed with proceeds of casualty and/or business interruption insurance.” 
 1.4 New Section. Section 9.1 of the Credit Agreement shall be amended to add the following section (k) thereto: 
 “(k) As soon as available and in any event within 45 days after the close of each of the quarterly accounting periods ending March 31, 2006, June 30, 2006 and September 30, 2006, a written report, in reasonable detail
for such applicable period, setting forth the amount of Consolidated Reimbursable Capital Expenditures made or incurred in such period and the amount of casualty and/or business interruption insurance proceeds received during such period.”

 2. REPRESENTATIONS AND WARRANTIES. The Borrower represents and warrants to the Lenders, the Swing Line Lender, each Letter of Credit
Issuer, the Administrative Agent and the Collateral Agent as follows: 
 2.1 Authorization and Validity of Amendment, etc. This
Amendment has been duly authorized by all necessary corporate action on the part of the Borrower, has been duly executed and delivered by a duly authorized officer of the Borrower and constitutes the valid and binding agreement of the Borrower,
enforceable against the Borrower in accordance with its terms. 
 2.2 Representations and Warranties. The representations and
warranties of the Borrower contained in the Credit Agreement or in the other Credit Documents are true and correct in all material respects on and as of the date hereof as though made on and as of the date hereof, except to the extent that such
representations and warranties expressly relate to an earlier specified date, in which case such representations and warranties are hereby reaffirmed as true and correct in all material respects as of the date when made. 
 2.3 No Event of Default. No condition or event has occurred or exists which constitutes or which, after notice or lapse of time or both, would
constitute a Default or an Event of Default. 
 2.4 No Claims. Neither the Borrower nor any Subsidiary has any claim or offset
against, or defense or counterclaim to, any of Borrower’s or any Subsidiary’s obligations or liabilities under the Credit Agreement or any other Credit Document. 
  

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 2.5 Compliance. The Borrower is in full compliance with all covenants and agreements contained in
the Credit Agreement, as amended hereby, and the other Credit Documents to which it is a party; and without limitation of the foregoing, each Subsidiary of the Borrower which, as of the date hereof, is required to be a Subsidiary Guarantor, has on
or prior to the date hereof, become a Subsidiary Guarantor under the Subsidiary Guaranty. 
 3. RATIFICATIONS. Except as expressly modified
and superseded by this Amendment, the terms and provisions of the Credit Agreement and each other Credit Document are ratified and confirmed and shall continue in full force and effect. 
 4. EFFECTIVENESS. The Amendments shall become effective on the date (the “Amendment Effective Date”) the following conditions
shall have been satisfied: 
 (a) This Amendment shall have been executed by the Borrower, the Lenders and the Administrative
Agent, and counterparts hereof as so executed shall have been delivered to the Administrative Agent; 
 (b) The Borrower shall
have caused the Subsidiary Guarantors to have executed, and shall deliver to the Administrative Agent, the Guarantor Acknowledgement attached hereto; and 
 (c) The Borrower shall have delivered to the Administrative Agent a written report, in reasonable detail for the quarterly accounting period ending December 31, 2005, setting forth the amount of Consolidated
Reimbursable Capital Expenditures made or incurred in such period and the amount of casualty and/or business interruption insurance proceeds received during such period. 
 Upon the satisfaction of the foregoing conditions precedent, this Amendment shall be binding upon and inure to the benefit of the Borrower, each Lender, the Swing Line Lender, each Letter of Credit Issuer, the
Administrative Agent and the Collateral Agent and their respective permitted successors and assigns. After this Amendment becomes effective, the Administrative Agent shall furnish a copy of this Amendment to each Lender and the Borrower. 

5. MISCELLANEOUS. 
 5.1 Survival of
Representations and Warranties. All representations and warranties made in this Amendment shall survive the execution and delivery of this Amendment, and no investigation by the Administrative Agent or any Lender or any subsequent Loan shall
affect the representations and warranties or the right of the Administrative Agent or any Lender to rely upon them. 
 5.2 Reference to
Credit Agreement. The Credit Agreement and any and all other agreements, instruments or documentation now or hereafter executed and delivered pursuant to the terms of the Credit Agreement as amended hereby, are hereby amended so that any
reference therein to the Credit Agreement shall mean a reference to the Credit Agreement as amended hereby. 
 5.3 Expenses. As
provided in the Credit Agreement, but without limiting any terms or provisions thereof, the Borrower shall pay on demand all reasonable costs and expenses incurred by the Administrative Agent in connection with the preparation, negotiation, and
execution of this Amendment, including, without limitation, the reasonable costs and fees of the Administrative Agent’s special legal counsel, regardless of whether this Amendment becomes effective in accordance with the terms hereof, and all
reasonable costs and expenses incurred by the Administrative Agent, the Collateral Agent, or any 

  

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Lender or Letter of Credit Issuer in connection with the enforcement or preservation of any rights under the Credit Agreement, as amended hereby. 

5.4 Severability. Any term or provision of this Amendment held by a court of competent jurisdiction to be invalid or unenforceable shall not
impair or invalidate the remainder of this Amendment, and the effect thereof shall be confined to the term or provision so held to be invalid or unenforceable. 
 5.5 Applicable Law. This Amendment shall be governed by and construed in accordance with the laws of the Commonwealth of Pennsylvania, without regard to principles of conflicts of laws. 
 5.6 Headings. The headings, captions and arrangements used in this Amendment are for convenience only and shall not affect the interpretation of
this Amendment. 
 5.7 Entire Agreement. This Amendment is specifically limited to the matters expressly set forth herein. This
Amendment and all other instruments, agreements and documentation executed and delivered in connection with this Amendment embody the final, entire agreement among the parties hereto with respect to the subject matter hereof and supersede any and
all prior commitments, agreements, representations and understandings, whether written or oral, relating to the matters covered by this Amendment, and may not be contradicted or varied by evidence of prior, contemporaneous or subsequent oral
agreements or discussions of the parties hereto. There are no oral agreements among the parties hereto relating to the subject matter hereof or any other subject matter relating to the Credit Agreement. 
 5.8 Counterparts. This Amendment may be executed by the parties hereto separately in one or more counterparts and by facsimile signature, each of
which when so executed shall be deemed to be an original, but all of which when taken together shall constitute one and the same agreement. 
 5.9 JURY TRIAL WAIVER. EACH OF THE PARTIES TO THIS AMENDMENT HEREBY IRREVOCABLY WAIVES ALL RIGHT TO A TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM ARISING OUT OF OR RELATING TO THIS AMENDMENT, THE OTHER CREDIT DOCUMENTS OR
THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY. EACH PARTY HERETO HEREBY (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF
LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER, AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AMENDMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION.

 [Signatures follow.] 
  

 4 

 IN WITNESS WHEREOF, this Amendment has been duly executed and delivered as of the date first above
written. 
  

			
	CALGON CARBON CORPORATION
		
	By:	 	/s/ Leroy M. Ball
	Name:	 	Leroy M. Ball
	Title:	 	 Vice President and Chief Financial Officer

  

			
	NATIONAL CITY BANK OF PENNSYLVANIA, as a Lender, and as a Letter of Credit Issuer, the Swing Line Lender, the Administrative Agent and the Collateral
Agent
		
	By:	 	/s/ Ervin M. Geiger III
	Name:	 	Ervin M. Geiger III
	Title:	 	 Senior Vice President

			
	PNC BANK, NATIONAL ASSOCIATION
		
	By:	 	/s/ Meredith S. Heavner
	Name:	 	Meredith S. Heavner
	Title:	 	 Vice President

			
	HARRIS N.A.
		
	By:	 	/s/ Patrick McDonnell
	Name:	 	Patrick McDonnell
	Title:	 	 Managing Director

			
	FIRST COMMONWEALTH BANK
		
	By:	 	/s/ C. Forrest Tefft
	Name:	 	C. Forrest Tefft
	Title:	 	 Senior Vice President

			
	FIRST NATIONAL BANK OF PENNSYLVANIA
		
	By:	 	/s/ John L. Hayes IV
	Name:	 	John L. Hayes IV
	Title:	 	 Vice President

 Exhibit I 
 See attached. 

 GUARANTOR ACKNOWLEDGMENT 
 Each of the undersigned (collectively, the “Subsidiary Guarantors” and, individually, each a “Subsidiary
Guarantor”) consents and agrees to and acknowledges the terms of the foregoing Amendment No. 1 to Amended and Restated Credit Agreement, dated as of March 23, 2006 (the “Amendment”). Each Subsidiary
Guarantor specifically acknowledges the terms of and consents to the waivers, including the jury trial waiver, set forth in the Amendment. Each Subsidiary Guarantor further agrees that its obligations pursuant to the Subsidiary Guaranty that it
executed in connection with the Credit Agreement shall remain in full force and effect and be unaffected hereby. 
 Each Subsidiary Guarantor
hereby represents and warrants that there exists no claim or offset against, or defense or counterclaim to, any of its obligations or liabilities under the Credit Agreement or any other Credit Document to which it is a party. 
 IN WITNESS WHEREOF, this Guarantor Acknowledgment has been duly executed and delivered as of the date of the Amendment. 
  

			
	CALGON CARBON INVESTMENTS INC.
		
	By:	 	/s/ Leroy M. Ball
	Name:	 	Leroy M. Ball
	Title:	 	 Vice President and Chief Financial Officer

	
	BSC COLUMBUS, LLC
		
	By:	 	/s/ Leroy M. Ball
	Name:	 	Leroy M. Ball
	Title:	 	 Vice President and Chief Financial Officer

	
	CCC COLUMBUS, LLC
		
	By:	 	/s/ Leroy M. Ball
	Name:	 	Leroy M. Ball
	Title:	 	 Vice President and Chief Financial Officer

	
	CCC DISTRIBUTION, LLC
		
	By:	 	/s/ Leroy M. Ball
	Name:	 	Leroy M. Ball
	Title:	 	 Vice President and Chief Financial Officer

 CALGON CARBON CORPORATION, 
 as the Borrower 
 THE LENDING
INSTITUTIONS NAMED HEREIN, 
 as Lenders 
 NATIONAL CITY BANK OF PENNSYLVANIA 
 as a Lender, a Letter of Credit Issuer, the Swing Line
Lender 
 and as Administrative Agent and Collateral Agent 
  

 AMENDMENT NO. 1 
 dated as of 
 March 23, 2006

 to 
 AMENDED AND
RESTATED 
 CREDIT AGREEMENT 
 dated as of 
 January 30, 2006

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