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• provide summaries of the 2002 Water Yeaz data collected at each site. Tables 37A and 38A provide period of <br />record statistical summazies of collected data at each site. Figures 70 through 73 provide graphical <br />representations of water levels and selected water quality parameters recorded at each site. <br />Data has been collected for these sites for a limited time, although the 2002 data is comparable to the 2001 water <br />yeaz. Well AVM-1 recorded new minimums for dissolved calcium, magnesium, sodium. New maximums were <br />recorded for bicarbonate, sulfate, and field pH. Well AVM-2 recorded new minimums for dissolved calcium, <br />magnesium, and sodium. New maximums were recorded for dissolved magnesium, dissolved manganese, and <br />sulfate. <br />3.3 Surface Water MonitorinE <br />Monitoring/Sampling Requirements: Technical Revision 38 (TR38, August 2001), and the subsequent Minor <br />Revision 02-180 (MR 180), outline the quantity and quality of area stream flows, the discharge from <br />sedimentation control ponds, mine water discharge, and the quantity and quality of springs. Monitoring sites and <br />sampling frequencies aze set forth in Exhibit 14, Table A, and in CDPS Permits CO-0027154, CO-0036684, and <br />CO-0042161. Site locations are shown on Map 13A, Hydrologic Monitoring Plan of TR38 (as well as in Figure <br />2 of this AHR). Table A of Exhibit 14 specifies three seasonal monitoring episodes (i.e. October [o Febmary, <br />Mazch to May, and June to September), each of which aze further divided into two general categories of sampling <br />frequency: 1) "Regular" monitoring that is done continuously, and 2) "Contingent" monitoring that is done only <br />• when there is a discharge from underground mine pumping at sites 109 and/or 115. All required <br />monitoring/sampling instances were completed during 2002. <br />Foide! Creek: Five surface flow monitoring sites on Foidel Creek in the vicinity of the TCC mine portals and <br />facilities areas are utilized. Site 800 and site 14 aze located upstream of the portal. Flows at site 800 (Former <br />USGS Station 09243800) were monitored by TCC in 2002. Site 8 is located a short distance downstream of the <br />portal azea and is monitored in conjunction with alluvial well 001-S-5. Site 900 is located further downstream. <br />Site 304 is located further downstream above the confluence with Middle Creek and is monitored in conjunction <br />with alluvial well 008-AV-2. Flows at site 900 (Former USGS Station 09243900) were also monitored by TCC <br />in 2002. Monitoring requirements at site 304 are limited to monthly water levels and quarterly water quality <br />sampling <br />Tables 39 through 43 provide summaries of the 2002 Water Yeaz data collected at each site. Tables 39A, 40A, <br />and 41A provide period of record statistical summaries of collected data at each site. Figures 47, 48, 74 through <br />81, and 118 through 121 provide graphical representations of water levels and selected water quality parameters <br />recorded at each site. Typical flow patterns were exhibited at these sites with spring runoff periods accounting <br />for the peak flows observed. At all of these sites, the inverse relationship between flow and field conductivity <br />continues to be evident. Note that drought conditions in 2002 resulted in site 900 going dry by the end of June. <br />Similazly, site 800 was dry throughout July, flowed briefly in August, and was dry through most of September. <br />C~ <br />10 <br />