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ATMOS ENERGY CORPORATION <br />MID-7EX DIVISION <br />Exhibit A to Settlement Agreement <br />Attachment A to Ordinaace <br />R{DER: <br />WNA - WEA7HER NORMALIZATION ADJUSTMENT <br />APPLICABLE TO: <br />All Cities except the City of Dallas and all unincorporated areas <br />EFFECTIVE DATE: <br />Bills Rendered on or after 1010112010 <br />Where qr is the relevant sales quantity for the jth customer in ith rate schedule. <br />Filinas with Entities Exercisinq Oriqinal Jurisdiction <br />As part of its annual RRM filing the Company will file (a) a copy of each computation of the Weather <br />Normalization Adjustment Factor, (b) a schedule showing the efFective date of each such Weather <br />Normalization Adjustment, (c) a schedule showing the factors of values used in calculating such <br />Weather Normalization Adjustment and (d) a random sample and audit of thirty (30) actual customer <br />bills, with customer information deleted, for each rate schedule or classification to which the WNA was <br />applied in the preceding 12 month period. To the extent that source data is needed to audit the WNA <br />application, such data will be provided by the Company as part af the annual RRM filing. <br />If the RRM is discontinued, as provided in the Rider RRM tariff, the information required herein to be <br />filed with the entities exercising original jurisdiction shall be filed on March 1 of each year. <br />Base Use/Heat Use Factors <br />Residential <br />Commercial <br />Base use <br />Heat use <br />Base use <br />Heat use <br />Weather Station <br />Mcf <br />Mcf/HDD <br />Mcf <br />Mcf/HDD <br />Abilene <br />1.06 <br />.0131 <br />9•03 <br />•0588 <br />Austin <br />1.17 <br />.0138 <br />19.39 <br />.0674 <br />. Dallas <br />1.49 <br />.0191 <br />20.37 <br />.0872 <br />Waco <br />1.13 <br />.0137 <br />11.81 <br />.0610 <br />Wichita <br />1.19 <br />.0136 <br />11.21 <br />.0549 <br />Falls <br />Sample WNAFy Calculation: <br />.3352 per Mcf = <br />Where <br />i = <br />Ri _ <br />(.0131 <br />2.5246 x <br />(1.06 <br />Residential Single Block Rate Schedule <br />2.5246 per MCF <br />HSFi = .0131 (Residential - Abilene Area) <br />x (30-17) ) <br />+ (.0131 x 17) ) <br />NDD = 30 HDD (Simple ten-year average of Actual HDD for Abilene Area - 8/15106 <br />-10/14/Q6) <br />ADD = 17 HDD (Actual HDD for Abilene Area - 9/15/06 - 10/14/06) <br />gli = 1.06 Mcf (Residential - Abilene Area) <br />