Exhibit 10


                        Amendment to Employment Agreement

     Amendment to the Employment Agreement dated January 1, 2005 between KeySpan
Corporation,  a New York  corporation  (the  "Company")  and Anthony Sartor (the
"Executive")  which is effective upon the date of execution set forth below (the
"Amendment".)



                                 WITNESSETH THAT



     WHEREAS, the Company and the Executive entered into that certain Employment
Agreement dated as of January 1, 2005 (the "Employment Agreement"),  pursuant to
which the Company provided for the employment of the Executive and the Executive
agreed to be employed by the  Company,  under the terms and  conditions  therein
stated; and

     WHEREAS,  the  Company  and the  Executive  desire to amend the  Employment
Agreement;

     NOW, THEREFORE, the Company and the Executive hereby agree as follows:


1.   Section 2.2 of the  Employment  Agreement  is hereby  amended to extend the
     Expiration Date from April 1, 2008 to April 1, 2009.





2.   Section 4.2 is hereby  amended and restated to be consistent  with the Term
     of this  Agreement  in  paragraph  1 above.  The  following  words  will be
     deleted: "upon attainment of age 65" and substituted in their place "at the
     Expiration Date of this Agreement; April 1, 2009."


3.   Section 4.4 is modified to add the following after the word;  "Term";  plus
     (z) the Highest Annual Bonus (as defined under the Senior  Executive Change
     of  Control  Plan")  that  would  have  been  payable  in each year for the
     remainder of the Term.

4.   Section  4.7(z) is  deleted in its  entirety  and the  following  words are
     inserted as  subparagraph  (z); "the Highest Annual Bonus (as defined under
     the Senior  Executive Change of Control Plan") that would have been payable
     in each year for the remainder of the Term.

5.   Section 5.2(D) is deleted in its entirety.

6.   A new Section 5.2 (D) is added to state the following "Section 5.2 will not
     apply after a determination of a Change of Control, as such term is defined
     in the KeySpan  Senior  Executive  Change of Control  Plan, if Executive is
     terminated  by the Company in  accordance  with  Section 4.7 hereof for any
     Reason other than Good Cause."

7.   Section  5.2(E) is added to state the following:  "If Executive  terminates
     his  employment  pursuant  to  Section  4.4,  after a Change of  Control of
     KeySpan  Corporation,  as  such  term  is  defined  in the  KeySpan  Senior
     Executive  Change of Control  Plan,  then the  Restricted  Period will only
     continue through March 31, 2009.


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8.   Section  5.2(F)  is added to state  the  following:  "If  KeySpan  sells or
     otherwise  disposes  in any manner  substantially  all of the assets or the
     equity  interest of Bard Rao + Athanos,  LLC and/or  Paulus,  Sokolowski  &
     Sartor,  LLC and  Executive  will not  control or in any way be involved in
     such purchase or acquisition of either company,  then KeySpan  acknowledges
     that  Executive may terminate his  employment  for Good Reason  pursuant to
     Section 4.4. whether Executive is employed or not employed by such acquirer
     or purchaser.

9.   Section  5.2(G)  is  added to  state  the  following:  "If  Executive  or a
     corporation,  partnership  or other  entity  controlled  by,  under  common
     control with, or controlling Executive,  purchases,  acquires or obtains in
     any manner  substantially  all of the assets or the equity interest of Bard
     Rao + Athanos,  LLC and/or Paulus,  Sokolowski & Sartor,  LLC, then Section
     5.2 will not apply with  respect to those  competitive  line(s) of business
     engaged in by Bard Rao + Athanos, LLC and/or Paulus, Sokolowski and Sartor,
     LLC and KeySpan  acknowledges  that  Executive may terminate his employment
     for Good Reason pursuant to Section 4.4.  whether  Executive is employed or
     not employed by such acquirer or purchaser.

10   Section 1. of the Supplemental  Retirement  Agreement dated January 1, 2005
     between  the  Company  and the  Executive  is  amended  to delete  the last
     sentence  in its  entirety  and  replace it with the  following  "Executive
     acknowledges  that in  accordance  with the  terms  and  conditions  of the
     Employment Agreement, Executive will retire no later than April 1, 2009. In
     addition, each reference in the Supplemental Retirement Agreement to "April
     1, 2008" is restated to be April 1, 2009 to be consistent  with the Term of
     paragraph 1 of the Employment Agreement.


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11.  Section  2a (ii) of the  Supplemental  Retirement  Agreement  is amended to
     delete after the words;  "by adding";  "one-half  year" and replacing  them
     with "one year."

12.  The second sentence of Section 4b.of the Supplemental  Retirement Agreement
     is  amended  to  delete  the  following;  "80%  of the  Executive's  target
     incentive  payable  in each year  during  the  remainder  of the Term," and
     insert the  following;  "the  Highest  Annual  Bonus (as defined  under the
     Senior  Executive  Change of Control Plan") that would have been payable in
     each year for the remainder of the Term."

13.  In  the  fifth  sentence  of  Section  5  of  the  Supplemental  Retirement
     Agreement,  the  reference  to age "65" is  modified to replace it with age
     "66."

14.  Section 5.2(H) is added as follows. Notwithstanding the above, if Executive
     submits a written  request to KeySpan seeking a waiver of all provisions of
     this Section 5.2, then KeySpan  agrees to consider  such waiver.  KeySpan's
     consent to such waiver  will not be  unreasonably  withheld or delayed.  If
     KeySpan  agrees to waive  the  provision  of this  Section  5.2,  then this
     Amendment  will be null  and  void  and of no  effect,  and the  Employment
     Agreement   will  continue  in  full  force  except  with  respect  to  the
     requirements of this Section 5.2 which will be waived.

15.  The following  provision  will be inserted in the Agreement  because of the
     enactment of Section 409A of the Internal Revenue Code.

     Notwithstanding  anything  herein  to  the  contrary,  if at  the  time  of
     Executive's  termination of employment with the Company,  he is a specified
     employee"  as defined in Section  409A of the  Internal  Revenue  Code,  as


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     amended (the "Code") and the deferral in the commencement of any payment or
     benefits  otherwise  payable  hereunder as a result of such  termination of
     employment is necessary in order to prevent any  accelerated  or additional
     tax  under  Section  409A  of  the  Code,   then  the  Company  will  defer
     commencement  of the  payment  of any such  benefit  or  payment  hereunder
     (without  any  reduction  in such  payment  or benefit  ultimately  paid or
     provided  to  Executive)  until  the  date  that  is six  months  following
     Executive's  termination  of  employment  with the Company (or the earliest
     date as is permitted under Section 409A of the Code.)


16.  The Parties agree that in all other respects,  the Employment  Agreement is
     ratified and confirmed.

     IN WITNESS WHEREOF, the Executive has executed this Agreement and, pursuant
to  authorization  of its  Board of  Directors,  the  Company  has  caused  this
Agreement  to be executed  in its name and on its behalf,  all as of the day and
year written below.


                                            /s/Anthony Sartor
                                            -----------------
                                               Anthony Sartor

                                            Date: 8/30/06
                                                  --------



                                             /s/Robert B. Catell
                                            ------------------------------
                                            KEYSPAN CORPORATION
                                            By: Robert B. Catell
                                            Chairman and Chief Executive Officer

                                            Date: 9/5/06
                                                 -------



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