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<br />2z <br />AQUIFER MONITORING NEAR THE DISSOLUTION SURFACE: American <br />Soda has re-entered the existing 20-1 well for the purpose <br />of monitoring the groundwater for potential changes in fluid <br />pressure, water quality (conductivity), and fluid <br />temperature associated with operation of the solution mining <br />well. This well is located approximately 100 feet from the <br />20-3 production well and is completed to just above the ~a~M <br />Dissolution Surface at a depth of 1,397 feet. The BLM is ,,~~tt~~Ny~ <br />requiring that, if water levels begin to rise in the 20-1 ~~I~1 S <br />well, an evaluation will be implemented by the BLM and ~' ^~ K <br />American Soda to determine the source of the head increase (`~ <br />(BLM 1997). EPA will be notified within five (5) days of an <br />increase in water levels. American Soda has agreed to <br />measure the water level monthly and to cap the 20-1 well, <br />per BI,M, should the water level rise 50 feet above baseline <br />conditions (American Soda 1997). These data will also be <br />provided to EPA. <br />UINTA FORMATION AQUIFER MONITORING: The water supply well <br />(20-8) will be used to monitor the groundwater in the Uinta <br />Formation. American Soda has also established a <br />downgradient monitoring well in the Uinta Formation to <br />monitor any effect on water in the lower portion of the <br />Uinta Formation. This well, denoted well 20-5, is located <br />approximately 180 feet north of the solution mining well. <br />Well 20-5, is completed to a depth of 642 feet. The water <br />level in the. Uinta Formation aquifer will be measured and <br />recorded weekly. The EPA Class V UIC authorization also <br />requires that water quality in the Uinta Formation be <br />monitored by the 20-8 water supply well and the 20-5 <br />monitoring well. This monitoring will continue as part of <br />this permit. <br />Monitoring Information <br />(Condition 2) <br />Records of any monitoring activity required under this <br />permit shall include: <br />ia) The dates, exact place, and the time interval of <br />sampling, monitoring, or field measurements; <br />(b) She name of the individual(s) who performed the <br />sampling or measurements; <br />(c) The exact sampling methods! used to take samples:- <br />(d) The date(s) laboratory analyses were performed; <br />(e) The name of the individual(s) who performed the <br />analyses: <br />