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<br />VI. Summation: <br /> <br />Calculation of the Total Technical Potential for reducing municipal per capita water <br />use is detennined by adding the individual technical potential amounts in items I through V <br />above. The following table is a summary of these calculations for the City of Paris water <br />system: <br /> <br />Conservation Measure Calculation Procedure Results <br />Reducing unaccounted-for (Dry-year demand) X o to 1.87 gpcd <br />uses (Unacc.-for percentage if <br /> over 15%, minus 15%) <br />Reducing indoor water use 20.5 gpcd (Most likely) to 20.5 to 21. 7 gpcd <br />due to water-efficient 21. 7 gpcd (Advanced) as <br />plumbing fixtures detennined by the TNRCC <br />Reducing seasonal water Seasonal use (Avg. use X 2.64 to 7.55 gpcd <br />use 20%) X 7% and 20% <br />Reducing water use through Average use X 2% and 5% 3.77 to 9.44 gpcd <br />public education programs <br />Reducing dry-year irrigation Dry-year irrigation use 2.04 to 3.88 gpcd <br />use (Dry-year demand - Avg. <br /> use) X 10.5% and 20% <br /> Total Technical Savings 28.95 to 44.44 gpcd <br /> Potential <br /> <br />To determine the long-tenn planning goal, these totals are subtracted from the !!a: <br />vear water demand (208.1 gpcd for Paris). <br /> <br />Long-tenn planning goal - (Dry-year demand) minus (Total Technical Potential) <br /> <br />= 208.1 gpcd - 28.95 gpcd = 179.15 gpcd ("Most Likely" conservation scenario) <br /> <br />= 208.1 gpcd - 44.44 gpcd = 163.66 gpcd ("Advanced" conservation scenario) <br /> <br /> <br />oal for munici al water use = 179.15 to 163.66 cd <br /> <br />These goals are based on a potential reduction in total municipal gallons per capita <br />per day demand by the year 2050. Some of these conservation measures, such as <br />retrofitting of water-conserving plumbing fixtures, will not be realized in the early years of <br />the goal but will result in increasing benefit as we approach the year 2050 when more <br />older homes are re-plumbed and future new homes constructed. A tentative schedule to <br />achieve 100% of the goal by the year 2050 would be: 10% by 2010,25% by 2020,50% <br />by 2030, 75% by 2040 and 100% by 2050. <br /> <br />Prepared by: City of Paris Environmcntal Services Division, Dccember, 1999 <br /> <br />9 <br />