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l <br /> �\7kk <br /> V <br /> Figure 23: 2006 aerial image(L)showing the location of the Squaw Gulch compliance monitoring point;the <br /> footprint of the waste rock in 1997 is shown in blue,yellow shows the extent in 1991. Right side is the same <br /> area on the 1951 USGS 1:24000 topography. The red line in both images is the Precambrian-diatreme contact. <br /> 4 <br /> t <br /> s �• <br /> eP <br /> Figure 24: Photograph of the town of Anaconda and the Mary McKinney mine,probably around 1893 <br /> (Campbell,1922,Plate 28). <br /> Figure 25 shows the footprint of VLF2 (construction began in 2013), the location of the Squaw Gulch <br /> monitoring wells, and the Precambrian-diatreme contact, on the 1951 USGS 1:24000 topography. VLF2 <br /> incorporates a synthetic liner, which prevents meteoric water from infiltrating into the groundwater system <br /> within the footprint of the VLF. <br /> Squaw Gulch groundwater monitoring data only go back to August 2014, after construction of VLF2 had <br /> begun, but prior to ore being placed in VLF2. The data in Figure 6 show that sulfate at SGMW 66-60 was <br /> around 900 mg/L in 2014, spiked at 1140 mg/L in March 2015, then declined until November 2015, when <br /> it achieved a relatively stable concentration of around 968 mg/L. <br /> First ore was delivered to VLF2 in October 2015, and data from SGMW 613-60 begin in September 2014. <br /> Comparison of the chemical data prior to ore delivery suggests that sulfate and pH are within one <br />