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conducted a series of site - specific investigations of ISDS and their potential to effect ground - <br />water quality in the vicinity of Bailey, Fairplay and Alma, and Lake George and Guffey between <br />2000 and 2003. These studies focused on water quality and did not address the water budget. <br /> <br />To my knowledge, the only pub lished studies that address Colorado site - specific water budgets <br />are associated with the Colorado School of Mines Tur k ey Creek Basin Project in Jefferson <br />County. Dr. Eileen Poeter, fellow CSM researchers/staff, and graduate students have published a <br />numbe r of papers documenting their findings in characterizing the ground - water system in the <br />Turkey Creek Basin. Some of these studies include water budgets associated with ISDS. Cited <br />values for the consumptive use of water, in the home, have ranged from 7 - 1 5%. For a properly <br />functioning septic/leach field system the estimated increase in evapotranspiration (ET) is small <br />~1%. In a recently completed Masters thesis, Water Budget of Mountain Residence, by Bill Paul <br />(CSM) he estimated that 84% of the ground wa ter pumped returns to the subsurface. The current <br />research has produced consumptive use values that are still in the range cited by the State <br />Engineer’s Office in the mid 1970’s. <br />