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ATTACHMENT A <br />TARIFF FOR GAS SERVICE <br />ATMOS ENERGY CORP., <br />MID -TEX DIVISION <br />RATE SCHEDULE: <br />Rate WNA — Weather Normalization Adjustment <br />APPLICABLE TO: <br />Entire System (except Environs areas <br />and the City of Dallas) <br />REVISION: <br />DATE: <br />EFFECTIVE DATE: <br />11/0112008 <br />PAGE: 2 OF 2 <br />Where q;; is the relevant sales quantity for the jth customer in ith rate schedule. <br />Filinas with Entities Exercisina Oriainal 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 of 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 Sensitivity (HSF) Factors <br />Residential Commercial <br />Base use HSF Base use HSF <br />VUaathPr Rtatinn Mrf Mnf /Hnn Mcf Mcf /HDD <br />Abilene <br />1.27 <br />0130 <br />10.93 <br />.0638 <br />Austin <br />1.29 <br />.0133 <br />18.47 <br />.0641 <br />Dallas <br />1.79 <br />.0186 <br />20.83 <br />.0878 <br />Waco <br />1.30 <br />.0141 <br />11.41 <br />.0617 <br />Wichita <br />Falls <br />1.35 <br />.0143 <br />11.62 <br />.0540 <br />Sample WNAF� Calculation: <br />.1533 per Mcf = 1.2267 x <br />Where <br />Ri = <br />(.0131 x (30 -17) ) <br />(1.14 + (.0131 x 17) ) <br />Residential Single Block Rate Schedule <br />1.2267 per MCF (Rate R - Final Order GUD No. 9670) <br />HSFi = .0131 (Residential -Abilene Area) <br />NDD = 30 HDD (Simple ten -year average of Actual HDD for Abilene Area — 9/15/06 <br />—10/14/06) <br />ADD = 17 HDD (Actual HDD for Abilene Area — 9/15/06 — 10/14/06) <br />BLi = 1.14 Mcf (Residential - Abilene Area) <br />