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Table 1 <br />1 -Dam Wellfield Test <br />Summary <br />Well <br />Total Water <br />Level Rise <br />during <br />Shutdown <br />(ft) <br />Total <br />Drawdown <br />after Restart <br />(ft) <br />HMEX -2R <br />3.3 <br />2.4 <br />HMEX -3R <br />4.0 <br />3.0 <br />THP -2 <br />2.5 <br />1.5 <br />THP -5 <br />1.2 <br />0.8 <br />MLGW-4 <br />1 2 <br />0.3 <br />MLGW -8 <br />3.1 <br />2.0 <br />MLGW -9 <br />0.3 <br />0.1 <br />MLGW -14 <br />3.5 <br />2.4 <br />Since the URS assessment in 2010, new monitoring wells (MLGW -12, -13, 14) were installed cast of <br />the 1 -Dam impoundment in September 2012 (Figure 1). These new monitor wells in combination <br />with four historical monitor wells (MLGW -4, -5, -8, and -9) are positioned to monitor downgradient <br />water levels and assist in the evaluation of the 1 -Dam wellfield effectiveness and capture zone. <br />As part of continued evaluation of the system, a wellfield shutdown /startup test was conducted in <br />October 2012. Four wells and four piezometers were monitored during the shutdown /startup test. <br />Maximum changes in water levels in these obsen-ation wells ranged up to 4 feet during the test as <br />shown on Table 1 and Figure 2. These results show that the monitoring network around 1 -Dam <br />wellfield is sufficient to record and monitor hydraulic effects of 1 -Dam wellfield operations. <br />Sincerely, <br />AJAX Mountain Enterprises LLC <br />oa LICFy <br />s <br />E WO; F O <br />39876 z . � <br />(L <br />• • <br />• . WC <br />FSSION�� - <br />Leah Wolf Martin, PG, PE <br />Project Manager <br />The installation of test holes /piezometers, extraction wells, and the historical and new 2012 monitor <br />wells meet the intent of Tasks 1 and 2 of the TR -10 submittal. The effectiveness and performance <br />of the system will continue to be monitored and evaluated using the monitoring network described <br />above. These data can be used to adapt or modify the system to maximize the capture of <br />groundwater as was intended in the original design. Please let us know if you have any additional <br />questions. <br />2 <br />Clear Creek Associates, PLC <br />R. Douglas Bartlett, RG <br />Principal Hydrogeologist <br />