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WATER MONITORING <br />• Water sampling for the site was not designed to be responsive to the RML. Surface water <br />sampling continues to be conducted pursuant to the NPDES discharge permit. Groundwater <br />sampling is conducted for the purpose of the mining permit pursuant to the DRMS regulations. <br />Surface Water <br />Surface water in the vicinity of the licensed facilities that may be impacted by site activities <br />consists of Ralston Creek. Ralston Creek is a tributary of the South Platte River system and <br />empties into Ralston Reservoir and Upper or Lower Long Lakes. These reservoirs are owned <br />and managed by the Denver Water utility as a public drinking water supply. The potential <br />influence of routine site activities on the creek is monitored on a monthly basis by collecting a <br />grab sample of the stream flow for dissolved and suspended uranium and dissolved and <br />suspended radium. Historic and 2009 results are displayed on the figures below for dissolved <br />uranium. <br />The following monitoring locations were sampled in 2009. <br />¦ One (1) monitoring location above any potential site activity, used as background above <br />the Waste Dump pile (AWD); <br />¦ One (1) monitoring location below the mine waste rock piles to quantify and separate any <br />potential influence of the waste rock from licensed activities (A001); <br />• One (1) monitoring location at the domestic well; <br />¦ One (1) monitoring location at the discharge point for the site wastewater treatment plant <br />to quantify the influence of the discharge on surface water; no discharge occurred at this <br />station over the past year, therefore no samples were collected (D001); <br />¦ One (1) monitoring location at the east property boundary of the site (set up by DRMS as <br />the compliance point) to quantify the overall influence of potential site discharges on the <br />creek (BPL); <br />¦ One (1) monitoring well located at the first bridge below property line (FBRG); <br />¦ One (1) monitoring well located Above Red Hill (ARH); and <br />¦ One (1) monitoring location approximately two point five (2.5) miles downstream of the <br />site at the Long-Lake head gate used to divert water between the lakes in the reservoir <br />system (LLHG). <br />21