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<br />The parking lot west of the building that was renovated last year includes approximately <br />3000 square feet of shrub beds, This is also fed through the State Services Building meter. <br />Based on 4 gallons per square foot, an additional 12,000 gallons are applied here annually, <br />Total irrigation water use is estimated at 73.0002allons per year after the remodeling, after <br />renovation, <br /> <br />Summary - Figure 2 summarizes the water balance estimates, Water use calculations were <br />based on observations, measurements, and discussions with personnel familiar with water <br />uses, Total water use is the average metered consumption prior to remodeling, for 1989 and <br />1990, Approximately 4% of actual metered use prior to the renovation was not accounted <br />for in this report, This discrepancy is probably due to the subjective estimates made during <br />the analysis of water usage and reflects the use of conservative assumptions, <br /> <br />After remodeling, the water use profIle is different. The largest reduction in usage is in <br />domestic use, where annual usage is reduced from about 2.5 million gallons per year to 0,8 <br />million gallons per year, This is in part due to a reduction in the number of personnel <br />working in the building, but mainly because of the installation of state-of-the-art low flow <br />plumbing fixtures throughout the building. Water use for facility cooling remains the same <br />before and after remodeling, but the percentage of total use attributed to cooling increases <br />from 27 % to nearly 50 %, There is an increase in irrigation water use due to the addition <br />of the parking lot west of the building, Kitchen use also increases after remodeling due to <br />the increased size of the cafeteria, <br /> <br />WATER CONSERVATION OPPORTUNITIES <br /> <br />The State Services Building was found to be very efficient from a water use standpoint. This <br />building is a show-case of water use efficiency. Water conservation opportunities were <br />difficult to fmd because they have already been implemented, One pressure relief valve was <br />found to be releasing water in the penthouse mechanical room on the top floor. <br /> <br />The following cost factors were used to compute the potential savings of water-conservation <br />measures: <br /> <br />* <br /> <br />Water cost of $0.60 per 1000 gallons. <br />Sewer cost of $1,77 per 1000 gallons of water used. <br />Electrical energy cost of $0,0609 per kilowatt-hour, <br />Natural gas energy cost of $0.3401 per hundred cubic feet. <br /> <br />* <br /> <br />* <br />* <br /> <br />The backflow preventer located in the penthouse mechanical room was found to be blowing <br />off water periodically, Approximately 1/2 cup of water was being released every minute <br />while we observed this unit. State personnel are aware of this problem, and it is being <br />addressed under the construction warranty with the contractor. Annual usage at present <br />rate of release would be approximately 16,000 gallons, or about $38 in water and sewer <br />costs, <br /> <br />5, <br />