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TRIANGLE AREA WATER SUPPLY WATER QUALITY MONITORING PROJECT <br />AMENDMENT TO INTERLOCAL AGREEMENT <br />ATTACHMENT B <br />TAWSMP ANNUAL COST SHARES FOR PHASE V: <br />FY 2004 — FY 2007 <br />The annual cost for Phase V of the Triangle Area Water Supply Monitoring Project is $340,000. <br />The US Geological Survey will provide a fifty percent cost share match of $170,000. The <br />Monitoring Project Partners' total annual cost for Phase V is the remaining $170,000, plus <br />$12,000 for TJCOG services and support. The Monitoring Project Partners' individual annual <br />cost shares are the sum of a base rate and a variable rate. The base rate is thirty percent of the <br />total annual Monitoring Project Partners' cost, which is thirty percent of $182,000, divided <br />equally among the Monitoring Project Partners. The variable rate is seventy percent of the total <br />annual Monitoring Project Partners' cost, which is seventy percent of $182,000, multiplied by <br />each Monitoring Project Partners' percentage of the total average annual water use during <br />Calendar Year 2001 for all Monitoring Project Partners. <br />Project Partners <br />Cary <br />Chatham County <br />Durham <br />Hillsborough <br />County 2 <br />Water and Sewer Authority <br />Total <br />Average Annual <br />Share of Total <br />Variable Rate <br />Base Rate <br />Phase V Annual <br />Dally Water Use <br />Water Use <br />Cost Share <br />Cost Share <br />Cost Share <br />(mgd)' <br />2.14 <br />3.9% <br />$ 4,963 <br />$ 6,067 <br />$11,030 <br />10.51 <br />19.1% <br />$ 24,376 <br />$ 6,067 <br />$30,442 <br />1.040 <br />1.9% <br />$ 2,411 <br />$ 6,067 <br />$8,478 <br />28.71 <br />52.3% <br />$ 66,587 <br />$ 6,067 <br />$72,653 <br />1.23 <br />2.2% <br />$ 2,853 <br />$ 6,067 <br />$8,919 <br />1.20 <br />2.2% <br />$ 2,783 <br />$ 6,067 <br />$8,850 <br />0.35 <br />0.6% <br />$ 814 <br />$ 6,067 <br />$6,881 <br />9.44 <br />17.2% <br />$ 21,894 <br />$ 6,067 <br />$27,961 <br />0.31 <br />0.6% <br />1 $ 719 <br />$ 6,067 <br />$6,786 <br />54.931 <br />1 100.0% <br />1 $ 127,4001 <br />$ 54,600 <br />$182,000 <br />Notes: <br />1. Average Annual Daily Water Use = Average Annual Daily Water Use - System Processes - Sales to Other <br />Systems. The data are for CY 2001 and reported by the Partners. <br />2. Orange County's Average Annual Daily Water Use is based on the percentage of the Orange- Alamance <br />Water System service area located within Orange County, as indicated in their 1997 Local Water Supply <br />Plan. <br />Page 13 of 14 <br />