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I F�ne 'gy, 6 Cost Benefit Analysis As this report documents an initial energy assessment, the cost benefit analysis presented below was completed at a high level. As shown in Table 5, the estimated payback as a result of implementing the energy conservation measures, assuming an estimated incentive from Duke Energy of $34,000 is 3.5 years. Table 5: Estimated enerav savinas and cost Der ECM for RCCC South Notes: 1. Estimated Duke Incentive is typically one year's electrical energy savings, less customer's portion of assessment cost. 2. Savings are based on Duke Energy Rate Schedule OPT -G, effective February 2012. 3. Electrical Energy savings are based on SC February 2012 rate increase 4. Savings are estimates based on industry experience, ASHRAE assumptions and guidelines, DOE studies on re- commissioning; not on modeled savings. Rev A 2012 -05 -15 Page 25 Final Draft G -2 Page 349 Total Estimated Savings Cost Payback ECM # Description ($ /year) ($) (years) ECM1: Chiller Plant Upgrades $ 11,000 $ 73,000 6.6 –I– – 2 – – – – – – – – – – – – – – – – – – – – – ECM2: Air Handler Control Upgrades – – – – – $ 11,000 – – – – – $ 60,000 – – – – 5.5 — 3 — — — — — — — — — — — ECM3: Lighting Upgrades — — $ 12,000 — — $ 20,000 — — 1.7 Total $ 34,000 $ 153,000 4.5 — — — — — — — — — — Du ke En Inc _ _ _ _ _ _ — — _ _ — — $ 3 4,0 00 — _ _ Net Total $ 34,000 $ 119,000 3.5 Notes: 1. Estimated Duke Incentive is typically one year's electrical energy savings, less customer's portion of assessment cost. 2. Savings are based on Duke Energy Rate Schedule OPT -G, effective February 2012. 3. Electrical Energy savings are based on SC February 2012 rate increase 4. Savings are estimates based on industry experience, ASHRAE assumptions and guidelines, DOE studies on re- commissioning; not on modeled savings. Rev A 2012 -05 -15 Page 25 Final Draft G -2 Page 349