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contract, the parties will agree which bill to consider predominant, i.e. to classify as the "month" by name only. 1. Utility rates and costs used for savings calculations are outlined in Exhibit D, Article 6, Utility Rate Structures. 2. Natural gas, oil, purchased steam, water and other purchased utilities usage's shall be determined by the method described above for electricity. 4.2.2 Metrix Calculations. The Tuning Period's utility data and weather parameters will be entered into Metrix or calculated using a substantially similar algorithm. Metrix will adjust the Tuning Period Data based on weather and operational conditions during the Annual Savings Period to estimate the energy and energy costs of the Facility had CONTRACTOR not performed the Work (the "Baseline"). CONTRACTOR will adjust energy savings for variations in energy consumption due to (a) Local weather conditions. (b) Occupancy level changes, hours of operation, (c) Structural modifications, modifications to energy consuming equipment, (d) Damaged or malfunctioning equipment, and (e) Any variances from the proposed operating schedules, strategies and conditions upon which the calculated savings are based on, and described in the Exhibit D, Article 7, "Contracted Baseline" that could affect energy usage. There may be changes in the Facility's usage and operation for which a calculated adjustment is necessary. Either the CLIENT or CONTRACTOR may propose an adjustment procedure based upon acceptable engineering practices to account for any such changes. The Baseline for each month of the Annual Savings Period for each energy type (excluding kW demand adjustments) will be calculated as follows: BL = B x (Ti - Ti-l) + CH X HDDm~,~ + Cc x CDDBc,~ + C~ x U~,~ + C2 x U2,~ + C3 x U3,i where: BL = B = Ti - Ti-1= CH, Cc= HDDB~,~ = CDDBc,i = BH, BC = C1, C2, C3 = added load) Ui,i, U2,i, U3,1 Baseline (Utility Units) Baseload consumption per unit time (Utility Units/day) time interval between date Ti and Ti-1 (days) Coefficients for Heating and Cooling Degree-days (Utility units/deg-day) Time history of Heating degree-days (°F-day or °C-day) Time history of Cooling degree-days (°F-day or °C-day) Heating and Cooling degree-day base temperatures (°F-day or °C-day) Coefficients for user variables 1,2,3 (e.g. occupancy/schedule, space utilization, = Coefficients for user variables 1,2,3 The Baseline for each month of the Annual Savings Period for each energy type for kW demand adjustments will be calculated as follows: Dm = B + C. x HDD~.,~ + Cc x CDD~c,1 + C~ x U~,~ + C2 x U2,~ + C3 x U3,i where: B - Baseload consumption per unit time (Utility Units/day)