Document:

Exhibit 4.2

                           MORTGAGE LOAN PURCHASE AGREEMENT

               This Mortgage Loan Purchase Agreement (the "Agreement"), dated
October 30, 2006, is between Banc of America Mortgage Securities, Inc., a
Delaware corporation (the "Purchaser" or the "Company") and Bank of America,
National Association, a national banking association ("BANA" or the "Seller").

               The Purchaser and the Seller hereby recite and agree as follows:

               Defined Terms. Terms used without definition herein shall have
the respective meanings assigned to them in the Pooling and Servicing Agreement
dated October 30, 2006 (the "Pooling and Servicing Agreement"), among the
Company, BANA, as servicer and Wells Fargo Bank, N.A., as trustee (the
"Trustee"), relating to the issuance of the Banc of America Alternative Loan
Trust 2006-8 Mortgage Pass-Through Certificates, Series 2006-8 (the
"Certificates") or, if not defined therein, in the underwriting agreement dated
October 27, 2006 (the "Underwriting Agreement"), among the Company, BANA and
Banc of America Securities LLC (the "Underwriter") or in the purchase agreement
dated October 30, 2006 (the "Purchase Agreement"), among the Company, BANA and
Banc of America Securities LLC.

               Purchase Price; Purchase and Sale. The Seller agrees to sell, and
the Company agrees to purchase, the mortgage loans (the "Mortgage Loans"),
listed in the Mortgage Loan Schedule. The purchase price (the "Purchase Price")
for the Mortgage Loans shall consist of $_____________________ payable by the
Company to the Seller on the Closing Date in immediately available funds.

               Upon payment of the Purchase Price, the Seller shall be deemed to
have transferred, assigned, set over and otherwise conveyed to the Company all
the right, title and interest of the Seller in and to the Mortgage Loans,
including all interest and principal received or receivable by the Seller on or
with respect to the Mortgage Loans after the Cut-off Date (and including
scheduled payments of principal and interest due after the Cut-off Date but
received by the Seller on or before the Cut-off Date and Principal Prepayments
received or applied on the Cut-off Date, but not including payments of principal
and interest due on the Mortgage Loans on or before the Cut-off Date), together
with all of the Seller's rights, title and interest in and to the proceeds of
any related title, hazard, primary mortgage, mortgage pool policy or other
insurance policies, but excluding any fees payable by a Mortgagor for the right
to cancel any portion of principal or interest of a BPP Mortgage Loan. The
Company hereby directs the Seller, and the Seller hereby agrees, to deliver to
the Trustee all documents, instruments and agreements required to be delivered
by the Company to the Trustee under the Pooling and Servicing Agreement and such
other documents, instruments and agreements as the Company or the Trustee shall
reasonably request.

               Representations and Warranties. The Seller hereby represents and
warrants to the Company that (i) the Company's representations and warranties to
the Trustee pursuant to Section 2.04 of the Pooling and Servicing Agreement
insofar as they relate to the Mortgage Loans are true and correct, as of the
date thereof, and (ii) the Seller has not dealt with any broker, investment
banker, agent or other Person (other than the Company and Banc of America
Securities LLC) who may be entitled to any commission or compensation in
connection with the sale of the Mortgage Loans. The Seller hereby agrees to cure
any breach of such representations and warranties in accordance with the terms
of the Pooling and Servicing Agreement.

               Repurchase or Substitution. The Seller hereby agrees to
repurchase any Mortgage Loan (i) for which any document is not delivered, as
provided in paragraph 2 above, (ii) which is found by the Trustee to be
defective in any material respect, as provided in the Pooling and Servicing
Agreement, or (iii) which is discovered at any time not to be in conformance
with the representations and warranties referred to in paragraph 3 above and
which document relating thereto the Seller does not deliver or which defect or
breach the Seller does not cure (as provided in paragraph 3 above) within 90
days after the date of notice thereof from the Trustee or the Company, at a
price equal to the then unpaid principal balance thereof, plus accrued and
unpaid interest at the applicable Mortgage Interest Rate, through the last day
of the month in which such repurchase takes place. In addition, the Seller
hereby agrees to reimburse the Purchaser for any Reimbursement Amount.
Alternatively, the Seller hereby agrees, if so requested by the Company, to
substitute for any such Mortgage Loan, a new mortgage loan having
characteristics such that the representations and warranties referred to in
paragraph 3 above would not have been incorrect (except for representations and
warranties as to the correctness of the Mortgage Loan Schedule) had such
substitute mortgage loan originally been a Mortgage Loan. The Seller further
agrees that a substituted mortgage loan will have on the date of substitution
the criteria set forth in the definition of "Substitute Mortgage Loan" in the
Pooling and Servicing Agreement. The Seller shall remit to the Company, in cash,
the difference between the unpaid principal balance of the Mortgage Loan to be
substituted and the unpaid principal balance of the substitute mortgage loan.

               BPP Mortgage Loans. With respect to any BPP Mortgage Loan, the
Seller hereby agrees to remit to the Trustee, on behalf of the Trust, as
assignee of the Company (a) the amount of any principal and interest due by a
Mortgagor and cancelled for any month pursuant to the terms of the related
Mortgage Note (the "Monthly Covered Amount") upon the disability or involuntary
unemployment of the related Mortgagor or (b) the outstanding principal balance
of the Mortgage Loan cancelled pursuant to the terms of the related Mortgage
Note together with accrued interest at the Mortgage Interest Rate minus the
Servicing Fee Rate to the date of cancellation (the "Total Covered Amount") upon
the accidental death of the related Mortgagor. Any Monthly Covered Amount or
Total Covered Amount payable by the Seller pursuant to this Section 5 shall be
deposited by the Seller in the Servicer Custodial Account on or prior to, in the
case of any Monthly Covered Amount, the Remittance Date relating to the
Distribution Date immediately following the Due Date as to which such Monthly
Covered Amount relates and, in the case of a Total Covered Amount, the
Remittance Date relating to the Distribution Date in the month following the
month in which the cancellation to which such Total Covered Amount relates
occurs.

               Underwriting. The Seller hereby agrees to furnish any and all
information, documents, certificates, letters or opinions with respect to the
mortgage loans, reasonably requested by the Company in order to perform any of
its obligations or satisfy any of the conditions on its part to be performed or
satisfied pursuant to the Underwriting Agreement or the Purchase Agreement at or
prior to the Closing Date.

               Costs. The Company shall pay all expenses incidental to the
performance of its obligations under the Underwriting Agreement and the Purchase
Agreement, including without limitation (i) any recording fees or fees for title
policy endorsements and continuations, (ii) the expenses of preparing, printing
and reproducing the Prospectus, the Prospectus Supplement, the Underwriting
Agreement, the Private Placement Memorandum, the Purchase Agreement, the Pooling
and Servicing Agreement and the Certificates and (iii) the cost of delivering
the Certificates to the offices of Banc of America Securities LLC insured to the
satisfaction of Banc of America Securities LLC.

               Notices. All demands, notices and communications hereunder shall
be in writing, shall be effective only upon receipt and shall, if sent to the
Company, be addressed to it at Banc of America Mortgage Securities, Inc., 214
North Tryon Street, Charlotte, North Carolina, 28255, Attention: General Counsel
with a copy to the Chief Financial Officer, or if sent to BANA, be addressed to
it at Bank of America, National Association, 101 South Tryon Street, Charlotte,
North Carolina, 28255, Attention: General Counsel with a copy to the Treasurer.

               Trustee Beneficiary. The representations, warranties and
agreements made by the Seller in this Agreement are made for the benefit of, and
may be enforced by, the Trustee and the Holders of Certificates to the same
extent that the Trustee and the Holders of Certificates, respectively, have
rights against the Company under the Pooling and Servicing Agreement in respect
of representations, warranties and agreements made by the Company therein.

               Recharacterization. The parties to this Agreement intend the
conveyance by the Seller to the Purchaser of all of its right, title and
interest in and to the Mortgage Loans pursuant to this Agreement to constitute a
purchase and sale and not a loan. Notwithstanding the foregoing, to the extent
that such conveyance is held not to constitute a sale under applicable law, it
is intended that this Agreement shall constitute a security agreement under
applicable law and that the Seller shall be deemed to have granted to the
Purchaser a first priority security interest in all of the Seller's right, title
and interest in and to the Mortgage Loans.

               Miscellaneous. This Agreement shall be governed by and construed
in accordance with the laws of the State of New York without regard to the
conflict of law provisions. Neither this Agreement nor any term hereof may be
changed, waived, discharged or terminated except by a writing signed by the
party against whom enforcement of such change, waiver, discharge or termination
is sought. This Agreement may not be changed in any manner which would have a
material adverse effect on Holders of Certificates without the prior written
consent of the Trustee. The Trustee shall be protected in consenting to any such
change to the same extent provided in Article IX of the Pooling and Servicing
Agreement. This Agreement may be signed in any number of counterparts, each of
which shall be deemed an original, which taken together shall constitute one and
the same instrument. This Agreement shall bind and inure to the benefit of and
be enforceable by the Company and the Seller and their respective successors and
assigns.

<PAGE>

        IN WITNESS WHEREOF, the Company and the Seller have caused this
Agreement to be duly executed by their respective officers as of the day and
year first above written.

                                          BANC OF AMERICA MORTGAGE SECURITIES,
                                             INC.

                                          By:       /s/ Judy Lowman
                                              ----------------------------------
                                              Name: Judy Lowman
                                              Title: Senior Vice President

                                          BANK OF AMERICA, NATIONAL ASSOCIATION

                                          By:    /s/ Stephen A. Cummings
                                              ----------------------------------
                                              Name: Stephen A. Cummings
                                              Title: Senior Vice PresidentEX-10.6

    

      Exhibit
        10.6

      

      CHANGE
        OF CONTROL AGREEMENT

      

      

      THIS
        CHANGE OF CONTROL AGREEMENT (“Agreement”) is made this 21st day
        of
November
        2002,
        by and
        among ATLANTIC BANCGROUP, INC. (“Company”), OCEANSIDE BANK (“Bank”) and
Barry
        W. Chandler
        (“Executive”). The Bank and the Company are collectively referred to herein as
        the “Employer.”

      

      

      INTRODUCTION

      

      To
        encourage the Executive to remain an employee of the Employer and to protect
        the
        Executive in the event of a Change of Control, the Employer desires to provide
        a
        change of control benefit to the Executive.

      

      

      AGREEMENT

      

      The
        Employer and the Bank agree as follows:

      

      

      Article
        1

      Definitions

      

      Whenever
        used in this Agreement, the following words and phrases shall have the meanings
        specified:

      

      1.1
         “Base
        Annual Compensation”
        shall
        mean the Executive’s average annualized compensation paid by the Employer, which
        was includible in the Executive’s gross income during the most recent five
        taxable years ending before the date of the Change of Control. This definition
        covers all amounts includible in compensation and defined as the Executive’s
“base amount” under Section 280G of the Code.

      

      1.2
         “Change
        of Control”
        means an
        event that would be required to be reported in response to Item 6(e) of Schedule
        14A of Regulation 14A promulgated under the Securities Exchange Act of 1934,
        as
        amended (“Exchange Act”) or any successor disclosure item; provided that,
        without limitation, such a Change in Control (as set forth in 12 U.S.C. Section
        1841(a)(2) of the Bank Holding Company Act of 1956, as amended) shall be
        deemed
        to have occurred if any person (as such term is used in Sections 13(d) and
        14(d)
        of the Exchange Act), other than any person who on the date hereof is a director
        or officer of the Employer: (i) directly or indirectly, or acting through
        one or
        more other persons, owns, controls, or has power to vote 25% or more of any
        class of the then outstanding voting securities of the Company or the Bank;
        or
        (ii) controls in any manner the election of the directors of the Company
        or the
        Bank. For purposes of this Agreement, a “Change of Control” shall be deemed not
        to have occurred in connection with a reorganization, consolidation, or merger
        of the Company or the Bank where the stockholders of the Employer, immediately
        before the consummation of the transaction, will own over 50% of the total
        combined voting power of all classes of stock entitled to vote of the surviving
        entity immediately after the transaction.

      
        
          
          

        

        
          
          

          
            

          

        

        
          
          

        

      

      1.3
         “Code”
        means
        the Internal Revenue Code of 1986, as amended.

      

      1.4 “Termination
        for Cause”
        means
        termination because of Employee’s personal dishonesty, incompetence, willful
        misconduct, material breach of fiduciary duty, intentional failure to perform
        stated duties, willful violation of any law, rule, or regulation (other than
        traffic violations or similar offenses) or final cease-and-desist order or
        other
        conduct which reflects poorly on Employer, as determined by the Board of
        Directors in its sole discretion. In determining “incompetence,” the acts or
        omissions shall be measured against standards generally prevailing in the
        banking industry. No act, or failure to act on Employee’s part, shall be
        considered “willful” unless done, or omitted to be done, by Employee not in good
        faith and without reasonable belief that his action or omission was in the
        best
        interest of Employer; provided that any act or omission to act on Employee’s
        behalf in reliance upon advice or written opinion of Employer’s counsel shall
        not be deemed to be willful.

      

      1.5 “Termination
        of Employment”
        means
        that the Executive ceases to be employed by the Employer for any reason
        whatsoever (including a resignation by Executive) other than of Termination
        for
        Cause or by death.

      

      Article
        2

      Change
        of Control Benefits

      

      2.1 Change
        of Control Benefits.
        In the
        event of a Termination of Employment within the three years following a Change
        of Control, the Employer shall pay or provide tot the Executive the Change
        of
        Control benefits as described in this Article 2.

      

      2.2 Amount
        of Cash Benefit.
        The
        Change of Control cash benefit shall be an amount equal to 2.99 times the
        Executive’s Base Annual Compensation at the date of the Change of Control, such
        benefit not to exceed the excess parachute payment provisions under Section
        280G
        of the Code.

      

      2.3 Payment
        of Cash Benefit.
        At the
        election of the Executive, the Employer shall pay the Change of Control benefit
        provided herein in either: (i) a lump sum to the Executive within 60 days
        of a
        Termination of Employment; or (ii) in 36 equal monthly installments beginning
        on
        the 30th
        day
        following a Termination of Employment.

      

      2.4 Additional
        Benefit.
        As an
        additional Change of Control benefit, for six months following a Termination
        of
        Employment, Employer shall continue to provide any health insurance benefits
        to
        Executive and his or her dependents, which were provided as of the date of
        the
        Change of Control.

      

      Article
        3

      General
        Limitations

      

      3.1 Excess
        Parachute Payment.
        Notwithstanding any provision of this Agreement to the contrary, the Employer
        shall not pay any benefit under this Agreement to the extent the payment
        of the
        benefit would impose an excise tax under the excess parachute rules of Section
        280G of the Code.

      

      3.2
         Termination
        for Cause.
        Notwithstanding any provision of this Agreement to the contrary, the Employer
        shall not pay any benefit under this Agreement in the event of a Termination
        for
        Cause.

      
        
          
          

        

        
          
          

          
            

          

        

        
          
          

        

      

      Article
        4

      Amendments
        and Termination

      

      This
        Agreement may be amended or termination only by a written agreement signed
        by
        the Employer and the Executive.

      

      Article
        5

      Miscellaneous

      

      5.1 Binding
        Effect.
        This
        Agreement shall bind the Employer and the Executive, and their respective
        beneficiaries, survivors, executors, successors, administrators and
        transferees.

      

      5.2 No
        Guarantee of Employment.
        This
        Agreement is not an employment policy or contract. It does not give the
        Executive the right to remain an employee of the Employer, nor does it interfere
        with the Employer’s right to discharge the Executive. It also does not require
        the Executive to remain an employee nor interfere with the Executive’s right to
        terminate his or her employment at any time.

      

      5.3 Non-Transferability.
        With the
        exception of transfer by the laws of devise and dissent, benefits under this
        Agreement may not be sold, transferred, assigned, pledged, attached or
        encumbered in any manner, and any such purported elimination shall be null
        and
        void.

      

      5.4
         Tax
        Withholding.
        The
        Employer shall withhold any taxes that are required to be withheld from the
        benefits provided under this Agreement.

      

      5.5 Applicable
        Law.
        The
        Agreement and all rights hereunder shall be governed by the laws of the State
        of
        Florida, except to the extent preempted by the laws of the United States
        of
        America and venue for any action hereunder shall lie in Duval County,
        Florida.

      

      5.6 Unfunded
        Arrangement.
        The
        Executive is a general unsecured creditor of the Bank for the payment of
        the
        benefits under this Agreement. The benefits represent the mere promise by
        the
        Employer to pay such benefits under this Agreement. The rights to benefits
        are
        not subject in any manner to anticipation, alienation, sale, transfer,
        assignment, pledge, encumbrance, attachment, or garnishment by
        creditors.

      

      5.7 Entire
        Agreement.
        This
        Agreement constitutes the entire agreement between the Employer and the
        executive as to the subject matter hereof. No rights are granted to the
        Executive by virtue of this Agreement other than those specifically set forth
        herein.

      

      5.8 Administration.
        The
        Employer shall have powers which are necessary to administer this Agreement,
        including but not limited to establishing rules and prescribing any forms
        necessary or desirable to administer this Agreement.

      

      
        
          
          

        

        
          
          

          
            

          

        

        
          
          

        

      

      IN
        WITNESS WHEREOF, the Employer and the Executive have executed this Agreement
        as
        of the date first written above.

      

      
        	
                ATLANTIC
                  BANCGROUP, INC.

              
	 	 	 	 
	 	 	 	 
	
                By:
                  

              	 
                /s/ David L. Young
	 	 	 	 
	
                Its:
                  

              	 Executive
                Vice President
	 	 	 	 
	 	 	 	 
	
                OCEANSIDE
                  BANK

              
	 	 	 	 
	
                By:
                  

              	 /s/
                David L. Young
	 	 	 	 
	
                Its: 

              	 Executive
                Vice President
	 	 	 	 
	 	 	 	 
	
                EXECUTIVE

              
	 	 	 	 
	
                By:
                  

              	 /s/
                Barry W. Chandler
	 	 	 	 
	
                Print
                  Name:  

              	 Barry
                W. Chandler

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